Fix ref-count underflow, PSP timezone units, thread restart race, color codegen

- util/ref.c: refUnlock's assert(count >= 0) on an unsigned count was
  tautological, so a double-unlock silently underflowed to UINT32_MAX
  instead of asserting. Now asserts count > 0 before decrementing.
- duskpsp/time/timepsp.c: timeGetRealTimeZonePSP returned hours while
  every other platform (and timeepoch.c's math) expects seconds.
- thread.c: threadHandler reset threadId outside the mutex, after
  signaling STOPPED, letting a caller's immediate threadStart() race
  threadStartRequest()'s "thread id not 0" assert. threadId is now
  reset inside the same locked section.
- tools/color.py: whole-number CSV channels (0, 1) produced invalid C
  float literals (0f, 1f) for the generated COLOR_*_3F/_4F macros.
  Route through float() so they always stringify with a decimal point.

Also adds .claude/code-check.md: a full review pass over every
subsystem in src/dusk/, with the above (plus several other findings
not yet acted on) written up in detail.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.claude/code-check.md

@@ -0,0 +1,858 @@
+# Dusk Code Check
+
+A working checklist for walking through `src/dusk/` (the core, platform-
+agnostic engine layer) one subsystem at a time and reviewing how it
+actually looks today -- not just what it's supposed to do. Pairs with
+`STATUS.md` (maturity snapshot) and `ROADMAP.md` (forward-looking work);
+this doc is about auditing what's already there.
+
+Each section below: **Purpose**, **Key files**, and a **Review status**
+line to fill in as each system gets walked through (e.g. `Not started` /
+`In progress` / `Reviewed 2026-08-01: <one-line finding>`).
+
+First full pass completed 2026-08-01 (all 23 sections below reviewed).
+See "Top cross-cutting findings" right after the index for the
+highest-priority items across all of them before diving into any one
+section -- this doc is long, don't make someone read all 23 to find
+the load-bearing bugs.
+
+Game-specific code lives in `src/duskrpg/` (not covered here) and
+platform-specific implementations live in `src/dusk<platform>/` /
+`src/duskgl/` / `src/dusksdl2/` (also not covered here) -- see `CLAUDE.md`
+for the layer structure.
+
+---
+
+## Index
+
+- [error](#error)
+- [assert](#assert)
+- [util](#util)
+- [event](#event)
+- [time](#time)
+- [thread](#thread)
+- [log](#log)
+- [system](#system)
+- [console](#console)
+- [asset](#asset)
+- [locale](#locale)
+- [save](#save)
+- [network](#network)
+- [display](#display)
+- [ui](#ui)
+- [entity](#entity)
+- [scene](#scene)
+- [physics](#physics)
+- [animation](#animation)
+- [script](#script)
+- [input](#input)
+- [engine](#engine)
+- [game](#game)
+
+---
+
+## Top cross-cutting findings
+
+Ranked roughly by real-world impact, not by section order. Each links
+to its full writeup below.
+
+1. **Bounds/capacity checks that matter at runtime are `assert*` calls,
+   which compile to no-ops in release (`DUSK_ASSERTIONS_FAKED`, set
+   whenever `NDEBUG` is defined) -- confirmed by reading `assert.h`
+   directly.** This shows up in [entity](#entity) (`entitymanager.c`,
+   `component.c` -- reachable from JerryScript via `moduleentity.c`
+   with no return-value check) and [scene](#scene) (`sceneCreate`'s
+   pool-exhaustion path, reachable from `new Scene()`). Untrusted
+   script input can silently get back an invalid ID that later indexes
+   a fixed array out of bounds in a release build -- the exact
+   "validate untrusted data with errorThrow, not asserts" case
+   CLAUDE.md/project memory already calls out, just not applied here.
+2. **FIXED 2026-08-01.** `util/ref.c`'s `refUnlock` decremented an
+   unsigned `count` guarded only by a tautological `count >= 0` assert
+   ([util](#util)) -- a double-unlock silently underflowed to
+   `UINT32_MAX` instead of tripping an assert. This wasn't just a
+   `util/` nit: it's the lock/unlock primitive `asset/loader/assetentry.c`
+   builds on (see [asset](#asset)), so an over-unlocked asset entry
+   became permanently un-reapable rather than erroring loudly. Now
+   asserts `count > 0` before decrementing; the pointless
+   `count >= 0` check in `refLock` was removed too.
+3. **`texture.c:42-52`'s `textureInit()` reads `texture->format` to
+   decide which `data` fields to validate *before* the struct is
+   zeroed a few lines later** ([display](#display)) -- it's validating
+   whatever stale value happened to be in the caller's (possibly
+   stack) memory, not the `format` parameter actually being requested.
+4. **FIXED 2026-08-01 (confirmed real before fixing).** PSP's
+   `timeGetRealTimeZonePSP` returned hours; every other platform
+   (`timeGetRealTimeZoneLinux`/Dolphin) returns seconds, and
+   `timeEpochInit`/`timeEpochGetHours` etc. add the timezone value
+   directly to a Unix-epoch-seconds timestamp -- confirmed by reading
+   all three platform implementations plus `timeepoch.c` directly, not
+   just trusting the review agent's claim. The PSP function's own
+   comment even said "Return timezone offset in hours". Now divides by
+   `1000000.0` only (microseconds -> seconds), matching the other
+   platforms. See [time](#time).
+5. **Discussed, not changed.** `consolePrint` aborts the process (via
+   `stringFormatVA`'s `assert(ret < destSize)`) instead of truncating
+   when a single debug line exceeds 511 bytes. This is a real, if rare,
+   crash risk (any format producing >511 bytes of runtime-variable
+   content -- a long path, a long error string -- takes the whole
+   process down over a debug print), but changing `stringFormatVA`
+   itself would affect every caller in the codebase, and a
+   console-local truncating rewrite is easy to do wrong (vsnprintf
+   directly, bypassing the project's string-utils convention) without
+   more time to get right. Left as-is pending a decision on which
+   fix shape is wanted. See [console](#console).
+6. **FIXED 2026-08-01.** `thread.c`'s `threadHandler` signaled
+   `THREAD_STATE_STOPPED` before resetting `threadId = 0`, and
+   `threadStartRequest` wasn't synchronized against that reset -- a
+   real (if rare-window) race, not hypothetical: the test suite was
+   already working around it by re-calling `threadInit()` instead of
+   exercising true stop/start reuse. `threadId` is now reset inside the
+   same mutex-locked section before the STOPPED signal/unlock;
+   `test_thread_restart` now loops 20x on the same `thread_t` without
+   re-initializing, which would have caught the old race. See
+   [thread](#thread).
+7. **FIXED 2026-08-01.** `tools/color.py` emitted invalid C float
+   literals (`0f`, `1f`, etc.) for any whole-number CSV channel --
+   confirmed by actually running the generator against `color.csv`
+   before and after. Was dormant only because `COLOR_*_3F`/`_4F` were
+   unreferenced anywhere in the repo; the first real use of a float
+   color variant wouldn't have compiled. Now routes channel values
+   through Python `float()` before interpolating (always stringifies
+   with a decimal point, e.g. `0.0`/`1.0`), and `test/display/test_color.c`
+   gained two tests that reference `COLOR_BLACK_3F`/`COLOR_WHITE_4F`/
+   `COLOR_RED_3B`/`COLOR_GRAY_3F` directly -- giving the previously-dead
+   generated macros real compile-time + value coverage instead of
+   silently bit-rotting again. See [display](#display).
+8. **`assetModelLoaderAsync` is confirmed fully dead** -- model loading
+   is genuinely synchronous end-to-end (verified by tracing the state
+   machine, not just repeating STATUS.md's claim). See [asset](#asset).
+9. **No cycle guard on prefab `extends` chains** in
+   `scenePrefabResolveAndApply` -- a self-referencing or A->B->A prefab
+   table is a stack-overflow crash from what looks like a harmless
+   typo in hand-authored data. See [scene](#scene).
+10. **Untested-code hot spots worth prioritizing** if test investment
+    is on the table: `util/ref.c`/`random.c`/`crypt.c`/`endian.c`
+    (zero tests), `animation/easing.c` (13 of 16 functions untested),
+    `event/`, `console/`, `system/`, `log/`, `input/`, `engine/`,
+    `locale/`, `save/`, and most of `display/` (mesh, shader, texture,
+    tileset, text, screen, framebuffer) have no dedicated tests at
+    all.
+
+Convention-only items (real, but lower stakes than the above): raw
+stdlib string functions (`strlen`/`strchr`/`strstr`/etc.) show up
+instead of `util/string.h` wrappers in `network/http/` and
+`asset/loader/locale/assetlocaleloader.c` ([network](#network),
+[asset](#asset)); several `display/mesh/` files use `//` header
+comments and `/* */` inline comments where CLAUDE.md wants the
+opposite ([display](#display)); `animation/`'s core files all use `//`
+copyright headers instead of `/** */` ([animation](#animation)).
+
+---
+
+## error
+
+**Purpose:** The engine's single error-handling convention. Every
+fallible function returns `errorret_t`, built with `errorOk()` /
+`errorThrow(fmt, ...)` / `errorChain(call)` and consumed with
+`errorIsOk()`/`errorIsNotOk()`/`errorCatch()`. No `errno`, no raw error
+codes anywhere else in the engine.
+
+**Key files:** `error.c/h`.
+
+**Review status:** Reviewed 2026-08-01. Solid, and tested unusually well
+(`test/error/test_error.c` covers thread isolation and concurrent
+throws, not just happy path). Two issues: `errorChainImpl` (error.c:86-91)
+hand-rolls `snprintf`/`strlen` instead of `util/string.h`'s
+`stringFormat`/`stringFormatVA` wrappers that `errorThrowImpl` uses one
+function above it -- an inconsistency, not just a style nit, since
+CLAUDE.md requires the wrappers everywhere. `errorThrowWithCode`
+(error.h:100) is dead code -- zero call sites anywhere in `src/`/`test/`.
+
+---
+
+## assert
+
+**Purpose:** Debug-time invariant checks -- `assertNotNull`, `assertTrue`,
+`assertFalse`, `assertUnreachable`, `assertIsMainThread`. Distinct from
+`error/`: asserts are for programmer mistakes/invariants, `errorret_t` is
+for runtime-recoverable failures (see `CLAUDE.md`'s note on validating
+untrusted data with `errorThrow` rather than asserting).
+
+**Key files:** `assert.c/h`.
+
+**Review status:** Reviewed 2026-08-01. Clean, no issues found. Impl
+functions + macros wrapping `__FILE__`/`__LINE__` and a proper
+`DUSK_ASSERTIONS_FAKED` no-op path for release builds;
+`assertNotNullImpl` (assert.c:109-111) does a real "touch" dereference
+after the null check as a belt-and-braces addition. Test coverage
+exercises both success and `expect_assert_failure` failure paths for
+every variant, including `assertDeprecated`/`assertIsMainThread`.
+
+---
+
+## util
+
+**Purpose:** Small stand-alone helpers with no engine-state dependencies:
+`array` (dynamic array), `crypt` (hashing/checksum), `endian` (byte-order
+swap), `math` (clamp/lerp/pow2/etc.), `memory` (`memoryAllocate`/`Free`/
+`Zero`/`Copy`/`Compare` -- the only allocator the rest of the engine is
+allowed to call directly), `random`, `ref` (refcounted handle with
+lock/unlock callbacks), `sort` (bubble sort used for one-time static list
+ordering), `string` (`stringCopy`/`Compare`/`Format`/etc. -- required in
+place of libc `str*` functions per `CLAUDE.md`).
+
+**Key files:** `array.c/h`, `crypt.c/h`, `endian.c/h`, `math.c/h`,
+`memory.c/h`, `random.c/h`, `ref.c/h`, `sort.c/h`, `string.c/h`.
+
+**Review status:** Reviewed 2026-08-01. Several real issues, worst was
+in `ref.c`: `refUnlock` (ref.c:37-39) decremented `count` (`uint32_t`)
+guarded only by `assertTrue(ref->count >= 0, ...)` -- tautologically
+always true on an unsigned type, so a double-unlock silently underflowed
+to `UINT32_MAX` and kept invoking `onUnlock` instead of tripping an
+assert (confirmed by reading ref.c directly). **Fixed 2026-08-01** --
+`refUnlock` now asserts `count > 0` before decrementing; also fixed
+`refInit`'s doc comment, which claimed a fresh ref starts at count 1
+when the code has always started it at 0. Same tautological unsigned
+`>= 0` assert remains in `memory.c:98` (lower stakes -- `memoryFree`'s
+own counter, not a shared lock/unlock primitive other subsystems build
+on -- left as-is). `memory.h:11` declares
+`static size_t MEMORY_POINTERS_IN_USE = 0;` directly in the header --
+confirmed present -- meaning every TU including it gets its own private
+copy (only "works" because the accessors all live in memory.c).
+`random.c`'s `randomInt` (confirmed, random.c:15-16) does
+`rand() % (max - min)` with no `max > min` check (UB on `max <= min`),
+and `srand()` is never called anywhere in the repo -- unseeded,
+deterministic RNG. `sort.c:1` has `#include <stdlib.h>` before the
+copyright header (confirmed). Test coverage: array/math/memory/sort/
+string are thorough; `ref.c`, `random.c`, `crypt.c`, `endian.c` have
+**zero** tests. `randomInt`/`randomFloat` also appear unused
+engine-wide (dead code, not just untested).
+
+---
+
+## event
+
+**Purpose:** Generic pub/sub primitive -- `event_t` wraps a caller-owned
+array of `eventcallback_t`/user-pointer pairs; `eventInit`/`eventSubscribe`/
+`eventInvoke`. Used for things like `uifullbox_t`'s transition-end
+callback and `uiloading_t`'s show/hide callbacks. Per `STATUS.md`: "Clean,
+small, finished", built to replace the old input system's callback
+pattern.
+
+**Key files:** `event.c/h`.
+
+**Review status:** Reviewed 2026-08-01. Well-formed -- correctly uses
+swap-with-last for O(1) unsubscribe, asserts on capacity overflow and
+duplicate-subscribe, no dead code (`eventUnsubscribe` used in 3 other
+files). No `errorret_t` needed here since these are programmer-error
+assertions rather than runtime-data validation, consistent with
+CLAUDE.md's assert-vs-error guidance. One gap: `test/event/` doesn't
+exist -- zero unit coverage, including the capacity-exceeded and
+double-subscribe assert paths.
+
+---
+
+## time
+
+**Purpose:** Frame delta/elapsed time (`TIME.delta`, exposed to JS via
+`moduleTime`) plus `timeepoch_t` wall-clock timestamps (used by
+`uifps.c` for the FPS counter).
+
+**Key files:** `time.c/h`, `timeepoch.c/h`.
+
+**Review status:** Reviewed 2026-08-01. `time.c:52-56` unconditionally
+formats an epoch string into a 256-byte stack buffer every single
+`timeUpdate()` call purely to feed a commented-out `consolePrint` --
+burns the leap-year/day-counting loop three times a frame for a
+discarded value. `timeepoch.c`'s day-counting loops have no
+handling/guard for negative epoch/timezone values (pre-1970). Test
+coverage is solid for `time.c` (mocked ticks, boundary/backwards-time
+cases) but `timeepoch.c`'s date math (leap year, rollover, format
+specifiers) has no dedicated tests despite being the more bug-prone
+half. The PSP-specific timezone unit bug flagged in the cross-cutting
+findings (#4) was confirmed and fixed 2026-08-01 --
+`timeGetRealTimeZonePSP` was returning hours where `timeepoch.c`
+expects seconds.
+
+---
+
+## thread
+
+**Purpose:** Thin cross-platform thread/mutex/thread-local wrappers.
+Used by the asset system's background loading and the POSIX console's
+input-polling thread.
+
+**Key files:** `thread.c/h`, `threadmutex.c/h`, `threadlocal.h`.
+
+**Review status:** Reviewed 2026-08-01. Conventions followed
+throughout. Real race condition, **fixed 2026-08-01**: `threadHandler`
+used to unlock `stateMutex` and signal `THREAD_STATE_STOPPED` *before*
+resetting `thread->threadId = 0`, but `threadStartRequest` asserts
+`threadId == 0` with no synchronization against that reset --
+`threadStop()` immediately followed by `threadStart()` on the same
+struct could intermittently trip the assert. Telling sign it was real,
+not theoretical: `test/thread/test_thread.c` already re-called
+`threadInit()` before restarting specifically "so threadId/state are
+reset" -- the test suite was working around the bug rather than
+exercising true reuse. `threadId` is now reset inside the same
+mutex-locked section, before the signal/unlock; the test now loops
+stop/start 20x on the same `thread_t` with no `threadInit()` in
+between. Otherwise test coverage is good (real pthreads, try-lock
+coordination, a 4-thread x 10k-iteration mutex contention test).
+
+---
+
+## log
+
+**Purpose:** `logDebug`/`logError` -- the engine's only print/debug-output
+path. Header-only declarations; each platform provides the actual
+implementation (see `src/dusk<platform>/log/`).
+
+**Key files:** `log.h` (declarations only, no `.c` in core).
+
+**Review status:** Reviewed 2026-08-01. Clean 2-function API; all
+three platform implementations (`dusklinux`, `duskpsp`, `duskdolphin`)
+match the declared signatures with correct `va_copy` usage for the
+dual stdout+file writes. Dolphin's `logError` correctly falls back to
+raw VIDEO/console init when the framebuffer isn't ready yet and blocks
+on a START-button dismiss loop; PSP writes to
+`ms0:/PSP/GAME/Dusk/*.log`. No bugs found. No `test/log/` exists --
+understandable for I/O/side-effect code, but zero coverage.
+
+---
+
+## system
+
+**Purpose:** Very early engine init (`systemInit`), the
+`systemplatform_t` enum (via the `systemplatformlist.h` X-macro pattern),
+and native OS dialog boxes (`systemdialogtype_t`: render-blocking vs
+tick-blocking).
+
+**Key files:** `system.c/h`, `systemplatformlist.h`.
+
+**Review status:** Reviewed 2026-08-01. X-macro platform enum and
+compile-time `#error` guards for missing platform macros used
+correctly; all three platforms define the required
+`systemInitPlatform`/`systemGetActiveDialogTypePlatform`/
+`systemGetCyclesPlatform`. Dead code confirmed: `systemPSPGetLanguage()`
+(`duskpsp/system/systempsp.c:51`) and `systemGetLanguageDolphin()`
+(`duskdolphin/system/systemdolphin.c:40`) are defined but never called
+anywhere -- likely intended for locale wiring that hasn't landed. No
+`test/system/` exists.
+
+---
+
+## console
+
+**Purpose:** In-engine dev console: fixed-size scrollback
+(`CONSOLE_HISTORY_MAX` lines x `CONSOLE_LINE_MAX` chars), `consolePrint`,
+a `dirty` flag consumers (namely `ui/debug/uiconsole.c`) watch to know
+when to rebuild their own cached representation. POSIX builds also poll
+stdin on a background thread for interactive script execution.
+
+**Key files:** `console.c/h`, `consoledefs.h`.
+
+**Review status:** Reviewed 2026-08-01. Two real issues. `consolePrint`
+(console.c:32-44) gets its length from `stringFormatVA(buffer,
+CONSOLE_LINE_MAX, ...)`, and `stringFormatVA` (util/string.c:100)
+**asserts** `ret < destSize` rather than truncating -- so any single
+debug line over 511 bytes aborts the process instead of just getting
+cut off, a harsh failure mode for a dev console. Separately,
+`consoleUpdate`'s doc ("Processes pending queued script lines") and
+`CONSOLE_EXEC_BUFFER_MAX` (consoledefs.h:12) describe a queued-script-
+execution feature that doesn't exist -- `console_t` has no exec-queue
+fields, `consoleUpdate` only toggles `visible`, and
+`CONSOLE_EXEC_BUFFER_MAX` is unreferenced elsewhere (dead constant,
+stale doc). No `test/console/` exists.
+
+---
+
+## asset
+
+**Purpose:** The asset pipeline: `dusk.dsk` zip archive reading
+(`assetfile.c/h`), lock/ref-counted entries (`asset/loader/assetentry.c/h`,
+built on `util/ref.h`), batch loading (`assetbatch.c/h`), and the loader
+registry (`asset/loader/assetloader.c/h`, plus one subfolder per loader
+type: `dmf/` mesh+model, `display/` texture+tileset, `locale/`, `json/`,
+`animation/`). See `CLAUDE.md`'s "Adding a new asset loader type" for the
+extension pattern. Per `STATUS.md`: model loading's "async" path is
+actually synchronous -- the one known stub in core.
+
+**Key files:** `asset.c/h`, `assetfile.c/h`, `assetbatch.c/h`,
+`loader/assetentry.c/h`, `loader/assetloader.c/h`.
+
+**Review status:** Reviewed 2026-08-01. Core is well-structured and the
+multi-pass reaper correctly handles parent/child dependency chains.
+Found: `assetFileInit` (assetfile.c:29) has `if(!zip_stat(...) == 0)` --
+precedence makes this `(!zip_stat(...)) == 0`, which happens to
+evaluate correctly for zip's 0/nonzero convention but reads as broken
+and should just be `zip_stat(...) != 0`. More seriously,
+`assetEntryLock`/`Unlock` sit on top of `util/ref.c`'s confirmed
+double-unlock underflow bug (see **util** above) -- an over-unlocked
+asset entry silently becomes un-reapable forever instead of asserting.
+**Confirmed via code-trace** (not just citing STATUS.md):
+`assetModelLoaderAsync` (assetmodelloader.c:19-23) is genuinely dead --
+`assetEntryStartLoading` unconditionally sets
+`ASSET_ENTRY_STATE_PENDING_SYNC`, and `assetModelLoaderSync`'s state
+machine never transitions to `PENDING_ASYNC` the way mesh/texture/
+tileset/locale/json/animation all do, so model loading runs fully
+synchronously via `assetRequireLoaded`'s busy-loop; grep confirms
+`assetModelLoaderAsync` has no callers. `assetlocaleloader.c` uses raw
+stdlib (`strstr`/`strncmp`/`strchr`/`strtol`/`atoi`) instead of
+`util/string.h` wrappers throughout, and tests line-prefixes via
+`memoryCompare(lineBuffer, "msgid", 5)` without confirming the reused
+stack buffer actually holds 5 valid bytes at that point -- a short line
+could spuriously prefix-match against stale buffer contents. Test
+coverage: good breadth for entry lifecycle, tileset/JSON/animation
+loaders, and locale parsing; no dedicated tests for mesh/model/texture
+loader internals or `assetfile.c`'s line reader.
+
+---
+
+## locale
+
+**Purpose:** Active-locale tracking (`LOCALE.locale`/`LOCALE.entry`) over
+`.po`-derived locale assets loaded through the asset system. See
+`assets/locale/en_US.po` -- per memory, currently placeholder/test
+content, not real shipped game text.
+
+**Key files:** `localemanager.c/h`, `localeinfo.h`.
+
+**Review status:** Reviewed 2026-08-01. Clean, no bugs found --
+correctly balances `assetEntryLock`/`Unlock` in both `SetLocale` and
+`Dispose` (unlocks the old entry before adopting the new one). Minor
+nit: `localeinfo.h` declares `static const localeinfo_t` globals
+(`LOCALE_EN_US` etc.) directly in the header, so every including TU
+gets its own duplicate copy -- harmless given how few TUs include it.
+No `test/locale/` directory; `test/asset/test_assetlocale.c` tests the
+loader, not `localemanager.c` itself.
+
+---
+
+## save
+
+**Purpose:** Slot-based save data (`SAVE_FILE_COUNT_MAX` fixed slots),
+yyjson documents persisted with size + CRC32 checksum. `saveLoad`/
+`saveSave` read/write JSON fresh every call; callers own the returned
+doc and must free it. Actual file I/O goes through platform stream hooks
+(`saveplatform_t`, one impl per platform) -- core `save.c` must never
+touch the filesystem directly. `savesettings.c/h` layers engine settings
+(display/audio/input/general) on top. Per `CLAUDE.md`: "mature, but
+undocumented" beyond the one paragraph there -- no tests.
+
+**Key files:** `save.c/h`, `savefile.h`, `savestream.c/h`,
+`savesettings.c/h`.
+
+**Review status:** Reviewed 2026-08-01. Clean and convention-compliant
+-- `save.c` genuinely never touches the filesystem directly (every I/O
+path goes through `saveXxxPlatform` macros, all three platforms define
+them), yyjson doc ownership is honored at every call site checked, and
+CRC32 is validated before parsing with every error path freeing `buf`.
+One real gap: `saveFileLoad`'s `memoryAllocate(file->size)`
+(savestream.c:122) allocates straight from an on-disk size field with
+no sanity bound before the allocation -- a corrupted/tampered save
+could request an oversized allocation, worth a max-size guard given the
+"never trust incoming data" principle (arguably applies to save files,
+not just network packets). Confirmed no `test/save/` exists. `saveDelete`/
+`saveExists`/`saveGet` are public API not yet called anywhere in the
+repo -- likely just unconsumed so far, not truly dead.
+
+---
+
+## network
+
+**Purpose:** Connection-state layer only (`networkstate_t`:
+`DISCONNECTED`/`CONNECTING`/`CONNECTED`/`DISCONNECTING`) plus a one-off
+HTTP client (`network/http/`: request/header/URL/thread/process split
+across files). **Not** a multiplayer/replication protocol yet -- that's
+`ROADMAP.md` items 8-17. Platform-specific connection polling (PSP's
+`sceNetApctl`, GameCube/Wii's `if_config()`) lives under
+`src/dusk<platform>/network/`. Has HTTP tests only (`test/network/http/`).
+
+**Key files:** `network.c/h`, `networkinfo.c/h`, `http/networkhttp.c/h`,
+`http/networkhttprequest.c/h`, `http/networkhttpthread.c/h`.
+
+**Review status:** Reviewed 2026-08-01. Genuinely stays a thin
+connection-state layer (grepped for "packet"/"replicat"/"multiplayer"/
+"udp" -- no hits, no scope creep). The HTTP client correctly validates
+untrusted server input with `errorThrow` rather than trusting it
+(malformed status lines, oversized headers, bad `Content-Length`,
+early-closed connections all throw) -- exactly what CLAUDE.md calls
+out. `networkhttpthread.c`'s request handoff is actually correct
+despite request fields being written outside the mutex: the final
+`state = PENDING` write happens under the same mutex the worker
+acquires, giving a valid release/acquire handoff (worth a comment, not
+a bug). One recurring convention violation:
+`networkhttpprocess.c`/`networkhttpurl.c` use raw stdlib
+`strlen`/`strchr`/`strstr`/`strncasecmp`/`strcspn` instead of
+`util/string.h` wrappers in several places -- `util/string.h` currently
+has no direct substitute for `strchr`/`strstr`/`strcspn`, so this may
+be a missing-utility gap rather than pure oversight. No leaks found
+(request/response bodies freed exactly once via
+`networkHttpRequestReset`, redirect loop frees the intermediate body).
+Real test coverage exists: `test/network/http/test_networkhttp.c` runs
+six tests against a fake loopback server (GET/POST/PUT, query encoding,
+redirects, connection-refused), each asserting zero leaked allocations.
+
+---
+
+## display
+
+**Purpose:** The engine's most mature, most-optimized subsystem --
+platform-agnostic rendering built on top of `duskgl`/`duskdolphin`.
+Subfolders: `mesh/` (primitive builders: cube/sphere/capsule/plane/
+triprism/quad, plus the shared `meshvertex_t`/`mesh_t` API), `shader/`
+(currently one material type, unlit), `spritebatch/` (the shared
+`SPRITEBATCH_SPRITES_MAX`-capacity quad batcher everything 2D goes
+through -- flushes on shader/material change), `texture/` (texture +
+tileset + palette), `text/` (`font_t`/`FONT_DEFAULT`'s baked-in bitmap
+glyphs, `textBuildSpriteCache`/`textDrawSpriteCache`'s build-once/
+translate-per-frame pattern), `screen/` (scan-safe area), `framebuffer/`.
+`color.csv` + `tools/color/csv/__main__.py` code-generate `color.h` --
+never hand-edit the generated header.
+
+**Key files:** `display.c/h`, `mesh/mesh.c/h`, `spritebatch/spritebatch.c/h`,
+`spritebatch/spritebatchsprite.c/h`, `text/font.c/h`, `text/text.c/h`,
+`texture/texture.c/h`, `texture/tileset.c/h`, `shader/shader.c/h`.
+
+**Review status:** Reviewed 2026-08-01. "Most mature" oversold it
+slightly -- real bugs found, several confirmed by direct read:
+- **texture.c:42-52 (confirmed)** -- `textureInit()` branches on
+  `texture->format` to validate the incoming `data` union *before*
+  `memoryZero(texture, ...)` runs a few lines later, so it's reading
+  whatever stale/uninitialized value was already in the caller's
+  struct, not the `format` parameter actually being requested.
+  Validation is effectively checking garbage.
+- `spritebatchsprite.c:20-25` -- `spriteBatchSpriteTilesetPosition`'s
+  zero-width/height early return zeroes `sprite.min`/`max` but leaves
+  `uvMin`/`uvMax` uninitialized (stack garbage); the existing
+  zero-size test doesn't check uv fields, so this isn't caught.
+- `mesh.c:43` -- `meshFlush`'s offset assert (`vertexOffset <
+  vertCount - 1`) wrongly rejects a valid offset at the very last
+  vertex; off-by-one.
+- `text.c:34-37` -- bounds assert uses `tileIndex <= tileCount`
+  (should be `<`), currently unreachable in practice since a preceding
+  clamp already guards it, but the assert itself is wrong.
+- `framebuffer.c:23-28` -- `frameBufferBind(NULL)` recurses into
+  binding the backbuffer without `errorChain`, discarding any failure
+  and unconditionally returning `errorOk()`.
+- `displayInit()`'s six static "SIMPLE" primitive meshes
+  (quad/cube/sphere/plane/capsule/triprism) are never disposed in
+  `displayDispose()` -- one VBO+VAO leaked per primitive on the
+  non-legacy GL path.
+- **Confirmed and fixed 2026-08-01.** `tools/color.py` (not the
+  `tools/color/csv/__main__.py` path CLAUDE.md's doc comment names --
+  that's a stale path, only a `__pycache__/` remnant exists there; the
+  live script is `tools/color.py`) emitted invalid C float literals
+  for whole-number CSV channels (`0`, `1` -- every black/white/primary
+  color), e.g. `color3f(0f, 0f, 0f)`. Was harmless *only* because
+  `COLOR_*_3F`/`_4F` were never referenced anywhere in `src/`/`test/`
+  -- confirmed by actually running the generator before and after the
+  fix, not just reading the source. Now routes channel values through
+  Python `float()` first (always stringifies with a decimal point);
+  `test/display/test_color.c` gained tests referencing
+  `COLOR_BLACK_3F`/`COLOR_WHITE_4F`/`COLOR_RED_3B`/`COLOR_GRAY_3F`
+  directly so the previously-dead macros now have real compile-time +
+  value coverage.
+- Style drift: `mesh.h` uses `//` header comments instead of `/** */`;
+  sphere/capsule/triprism use `/* */` block comments inside function
+  bodies where CLAUDE.md mandates `//`; every primitive builder's
+  JSDoc still documents a `@param color` that no longer exists in the
+  signature (leftover from before color moved out of `meshvertex_t`).
+- The primitive `*Buffer()` flexible-geometry functions (sphereBuffer,
+  capsuleBuffer, etc.) are confirmed unused outside their own
+  `*Init()` -- only the fixed default mesh instances are actually
+  consumed (via `script/module/display/modulemesh.c`).
+
+Test coverage: `test/display/` only registers `test_color.c` and
+`test_spritebatchsprite.c` -- mesh/shader/texture/tileset/palette/text/
+font/screen/framebuffer all have zero unit tests.
+
+---
+
+## ui
+
+**Purpose:** Flat, static, singleton-driven widget framework -- no scene
+graph. Top level is a compile-time X-macro registry
+(`uielementlist.h`/`uielement.c/h`) of `{init, update, draw, dispose,
+order}` tuples (screens: frame/confirm/settings/overlays/console/fps),
+spliced with `duskrpg`'s own list. Composition below that is `uimenu_t`
+(`widget/uimenu.c/h`) -- a flat tagged-union array of widgets laid out in
+a simple row/column grid via the `MENU_*` authoring macros; no nesting.
+Widgets: `uilabel`/`uiwidgetlabel` (cached glyph sprites, the pattern
+every other widget's text now uses), `uibutton`, `uicheckbox`,
+`uislider`, `uidropdown`, `uitab`, `uiscrolling` (empty placeholder).
+`focus/` is the gamepad/keyboard directional-navigation stack (no mouse/
+pointer hit-testing exists anywhere). `frame/` is the 9-slice box plus
+the confirm dialog and settings screens. `overlay/` is fullscreen
+fades/loading/crop bars. `debug/` is the FPS counter and dev console
+renderer.
+
+As of 2026-07-31: slider/tab/frame (`uiFrameDrawCached`)/duskrpg's
+textbox all cache their sprite geometry instead of rebuilding it every
+frame; console uses a fixed-size vertex buffer instead of alloc/free.
+Still open: sprite-batch flushes are keyed on material/color, so
+per-widget highlight-color changes still force a flush per widget (see
+`ROADMAP.md` item 5 in the debt backlog). No JS bindings exist for UI
+yet. `test/ui/`/`test/display/test_spritebatchsprite.c` cover the new
+caching *logic* only -- nothing exercises real `uiXxxDraw()` calls, since
+those need a live GL context (`FONT_DEFAULT`/`UI_FRAME` textures) this
+repo's test binaries don't have.
+
+**Key files:** `ui.c/h`, `uielement.c/h`, `focus/uifocus.c/h`,
+`widget/uimenu.c/h`, `widget/uilabel.c/h`, `frame/uiframe.c/h`,
+`debug/uiconsole.c/h`.
+
+**Review status:** Reviewed 2026-07-31 (this session's sprite-caching
+pass) -- see notes above; per-material flush granularity and hit-testing
+still open.
+
+---
+
+## entity
+
+**Purpose:** Fixed-size-array ECS. `entitymanager_t` owns
+`ENTITY_COUNT_MAX` entities, each with up to `ENTITY_COMPONENT_COUNT_MAX`
+components stored in a tagged union (`componentdata_t` -- flagged in
+`PSP_OPTIMIZATION_PLAN.md` as the biggest PSP memory-waste candidate,
+since every entity reserves space for every component type's largest
+variant). `componentlist.h`'s `X()` macro auto-generates the component
+enum/union/dispatch table from `entity/component/**`; engine-level
+`entityprefablist.h` is an empty sentinel (real prefabs live in
+`duskrpg/entity/entityprefablist.h`, resolved via
+`entityPrefabResolveAndApply`). No JSON serialize/deserialize (removed by
+design in favor of C-coded prefabs or JerryScript `Entity`/`Component`).
+
+**Key files:** `entitymanager.c/h`, `entity.c/h`, `component.c/h`,
+`componentlist.h`, `entityprefab.c/h`.
+
+**Review status:** Reviewed 2026-08-01. Structurally sound (sentinel
+prefab list, X-macro shape both match CLAUDE.md), but there's a real
+security-relevant gap: **every capacity/bounds guard
+(`entitymanager.c:35`, `entity.c:56`, `component.c:37-39,58-62,75-76,
+140-141`) is an `assert*` call**, and `assert.h` compiles these to
+`((void)0)` under `DUSK_ASSERTIONS_FAKED` (auto-set whenever `NDEBUG`
+is defined -- confirmed by reading assert.h directly, this is a real
+release-mode no-op, not a hypothetical). `moduleentity.c:30,67` create
+entities/components from JerryScript with no return-value check, so a
+script that exceeds `ENTITY_COUNT_MAX`/the per-entity component cap
+silently gets back an invalid ID in release builds, which then indexes
+fixed arrays out-of-bounds later. This directly contradicts the
+project's own "untrusted-data limits need errorThrow, not asserts"
+guidance -- and script input is about as untrusted as it gets. Minor:
+`component.h:100`/`component.c:52` misplace the `*` in `void *
+componentGetData(`. Dead code: `entityUpdateRemove`/
+`entityDisposeRemove`/`entityDisposeAdd` have zero call sites.
+
+---
+
+## scene
+
+**Purpose:** Same shape as `entity/` one level up -- `SCENE_COUNT_MAX`
+fixed-count scenes, each an isolated entity-manager pool; engine-level
+`sceneprefablist.h` is an empty sentinel (real prefabs in
+`duskrpg/scene/`). As of the `Scene.set()` work (2026-07-31), JerryScript
+can install a `{init, update, dispose}` module as the active scene via
+`modulescene.c`'s `moduleSceneSetStatic`/`moduleSceneUpdateCurrent`/
+`moduleSceneTeardownCurrent` (see `script` below) -- scene IDs are reused
+from a small pool immediately after `sceneDestroy`, so don't assume a
+freshly created scene has a "new" ID.
+
+**Key files:** `scene.c/h`, `scenebase.h`, `sceneprefab.c/h`.
+
+**Review status:** Reviewed 2026-08-01. Shares entity/'s assert-not-
+errorThrow bounds gap (`sceneCreate` hits `assertUnreachable` then
+falls through to `SCENE_ID_INVALID` on pool exhaustion in release --
+reachable from `new Scene()` in JS). Additional finding:
+`scenePrefabResolveAndApply`/`scenePrefabInit` (sceneprefab.c:31-54)
+recurse through a prefab's `extends` chain with **no cycle guard** -- a
+self-referencing or A→B→A prefab table causes unbounded recursion/
+stack overflow from what's otherwise a one-typo mistake in a
+hand-authored prefab list. No dead code, no use-after-free. Tests cover
+create/destroy/isolation/update cadence well but have zero coverage for
+pool exhaustion, `sceneRender()`, or `sceneprefab.c` (no prefab test
+file exists at all).
+
+---
+
+## physics
+
+**Purpose:** `physicsworld_t` step simulation over `physicsbodytype_t`
+(static/dynamic/kinematic) and `physicshapetype_t` (cube/sphere/capsule/
+plane/custom, plus mesh shapes via `physicsshapemesh.c/h`).
+`triggersystem.c/h` layers trigger-volume enter/exit events on top. Per
+`STATUS.md`: "mature, recently churned" -- a revert/re-disable of "old
+ent code" suggests component wiring isn't fully settled yet. Well
+tested (`test/physics/`).
+
+**Key files:** `physicsworld.c/h`, `physicsbodytype.h`, `physicsshape.h`,
+`physicsshapemesh.c/h`, `triggersystem.c/h`.
+
+**Review status:** Reviewed 2026-08-01. `STATUS.md`'s "component
+wiring isn't fully settled" caveat looks stale on closer look:
+`physicsWorldStep`/`triggerSystemStep` are live-wired in `scene.c:89-90`
+and `duskrpg`'s player prefab actively uses both PHYSICS and TRIGGER --
+no `#if 0`/TODO/commented-out code found; the disable-then-revert in
+history reads like a same-day whole-ECS revert, not something
+physics-specific. Two real bugs found instead:
+`physicsbodytype.h:23-27` documents kinematic bodies as capable of
+being a player controller, but `physicsworld.c:124,166-167` only ever
+writes `onGround` for the dynamic side of a collision pair -- a
+kinematic controller's `onGround` is permanently false (latent today,
+since the one existing player prefab uses DYNAMIC, not KINEMATIC).
+`physicstest.c:213`'s barycentric interior-test branch has no guard
+against a zero-area triangle (divide-by-zero/NaN risk in mesh-sphere
+collision). Dead code: `physicsShapeMeshCreate` (mesh-terrain
+collision) has zero production callers despite being well-tested in
+isolation; `entityPhysicsGetShape`/`GetCollideMask` are unwired to the
+JS module. Test depth is genuinely strong for what's implemented
+(gravity convergence, dynamic-vs-dynamic separation, mask filtering,
+mesh sphere/capsule resting) -- "well tested" is earned for the
+features that exist, though the unused mesh-collision path and
+missing trigger→JS bridge mean the subsystem's *integration* maturity
+is a bit narrower than its test depth suggests.
+
+---
+
+## animation
+
+**Purpose:** Keyframe + easing only -- no blend trees or state machines
+yet. `keyframe_t`/`keyframeset_t` interpolate values over time via
+`easing.c/h`'s easing functions; `animation.c/h` ties a keyframe set to
+playback state. Per `STATUS.md`: terse commit history ("ANIM") suggests
+still iterating.
+
+**Key files:** `animation.c/h`, `easing.c/h`, `keyframe.c/h`,
+`keyframeset.c/h`.
+
+**Review status:** Reviewed 2026-08-01. All 8 core files use `//`
+copyright headers instead of the required `/** */` block, inconsistent
+with the correctly-formatted `entityanimation.{c,h}` next door. Math
+checks out: all 16 easing functions satisfy f(0)=0/f(1)=1 with no
+precision issues, and keyframe interpolation clamps (doesn't
+extrapolate) outside the time range with no reachable divide-by-zero
+-- though it doesn't validate that keyframe times are ascending. 15 of
+16 `easing.h` declarations lack Javadoc. Biggest gap: **no
+`test_easing.c` exists** -- only linear/in-quad get incidental coverage
+via `test_keyframe.c`, so 13 of 16 easing functions are completely
+untested. Dead code (test-only, unused by any `duskrpg` game code):
+`keyframeSetGetValues`, `keyframeSetFireCallback`, `animationSetEvent`,
+`entityAnimationSetKeyframes`/`GetValue`.
+
+---
+
+## script
+
+**Purpose:** Embedded JerryScript integration. `scriptmanager.c/h` owns
+the JerryScript context lifecycle and the exec/call helpers
+(`scriptManagerExec`/`ExecFile`/`CallGlobal`/`CallValue`, the last two
+sharing exception + promise-draining logic). `scriptproto.c/h` is the
+`scriptproto_t` prototype-wrapping helper every module builds on.
+`module/` holds each registered JS-facing module:
+- `modulebase.h` -- the shared macro toolkit (`moduleBaseFunction`,
+  `moduleBaseRequireArgs`/`RequireString`/etc., `moduleBaseDefineProp`/
+  `Func`/`StaticFunc`, `moduleBaseSetWrappedPointer`, `moduleBaseThrowError`).
+- `moduleplatform.h`, `entity/moduleentity.c/h` +
+  `entity/component/*` (generic `Component` plus typed Position/Physics/
+  Renderable wrappers via `modulecomponentlist.c/h`), `scene/modulescene.c/h`
+  (`Scene`, including `Scene.set()`), `display/modulemesh.c/h`,
+  `time/moduletime.c/h`, `require/modulerequire.c/h` (CommonJS-style
+  `require()`/`module.exports`, with a directory stack for relative
+  resolution -- `scriptManagerExecFile` now pushes its own file's
+  directory before exec so a top-level entry script's relative
+  `require()` calls resolve correctly).
+- `modulelist.c/h` -- registers/disposes every module above in order;
+  `moduleListDispose()` is now actually called from
+  `scriptManagerDispose()` (was a latent bug -- it wasn't, until
+  2026-07-31).
+
+Entry point convention: `assets/scripts/init.js` does
+`require('./scenefile.js')` + `Scene.set(module)`. Has unit tests
+(`test/script/`), including one that reads the real shipped
+`overworldscene.js` off disk rather than an embedded copy.
+
+**Key files:** `scriptmanager.c/h`, `scriptproto.c/h`,
+`module/modulebase.h`, `module/modulelist.c/h`,
+`module/require/modulerequire.c/h`, `module/scene/modulescene.c/h`.
+
+**Review status:** Reviewed 2026-07-31 (this session's Scene.set() +
+require()-dir-stack work) -- see notes above.
+
+---
+
+## input
+
+**Purpose:** Bind-based input (`inputaction.c/h` maps
+`INPUT_BIND_*` names to raw `inputbutton_t`s per platform), with a
+configurable analog deadzone. Platform button/axis backends live under
+`src/dusk<platform>/input/`; capability macros (`DUSK_INPUT_GAMEPAD`/
+`KEYBOARD`/`POINTER`) gate what's available per target. Pointer axis
+values are plumbed through (`DUSK_INPUT_POINTER`), but nothing in `ui/`
+consumes them yet -- no hit-testing exists (see `ui` above).
+
+**Key files:** `input.c/h`, `inputaction.c/h`, `inputbutton.c/h`.
+
+**Review status:** Reviewed 2026-08-01. Clean and convention-compliant;
+deadzone math (`inputDeadzone`, input.c:244) is correct and safe. One
+naming nit: `inputBind`'s param is named `act` in input.h:216 while its
+own doc comment calls it `action`. **Confirmed, not just cited from
+STATUS.md**: pointer input is genuinely wired end-to-end, not a
+dead-end at the platform layer -- SDL2's `inputUpdateSDL2` populates
+`INPUT.platform.mouseX/Y`/scroll from `SDL_GetMouseState`,
+`inputButtonGetValueSDL2` handles the pointer-axis cases, and
+`duskrpg/input/inputbindmap.h` binds `mouse_x`/`mouse_y` to
+`INPUT_BIND_POINTERX/Y`. The dead end is specifically at the
+*consumption* layer: grepping `src/dusk/ui/` for those binds or any
+pointer-axis read turns up nothing -- exactly as STATUS.md says, just
+now confirmed rather than assumed. No tests exist for `input/`.
+
+---
+
+## engine
+
+**Purpose:** Top-level init/update/dispose orchestration
+(`engineInit`/`engineUpdate`/`engineDispose`) -- the thing `main.c` calls,
+which in turn calls into every subsystem above plus `game/gameInit` etc.
+`ENGINE.running`/`ENGINE.version` are the only bits of global state
+outside the per-subsystem structs.
+
+**Key files:** `engine.c/h`.
+
+**Review status:** Reviewed 2026-08-01, confirmed by direct read of
+`engineInit`/`engineDispose`. Init order is safe (time -> console ->
+system -> input -> asset -> scriptManager -> save/saveSettings ->
+locale -> display -> ui -> network -> scene -> game), with display
+before UI and scriptManager before scene/game so JS `Entity`/`Scene`
+wrappers exist before any script runs. `engineDispose` is **not** a
+clean reverse of that order, though: `localeManagerDispose()` runs
+*before* `uiDispose()`/`displayDispose()`, even though locale was
+initialized *before* both -- correct reverse order would tear down
+UI/display first, and as written there's a real risk of UI/display
+teardown code touching already-freed locale data (e.g. any localized
+string still held/logged during dispose). Separately, `void
+engineExit(void)` (engine.c:95) is defined but **not declared in
+engine.h**, and a repo-wide grep finds no caller anywhere -- dead,
+unreachable, and in violation of the "every public function must be
+declared in its header" rule. No tests exist for `engine/`.
+
+---
+
+## game
+
+**Purpose:** Intentionally header-only in core -- just declares
+`gameInit`/`gameUpdate`/`gameDispose`. The real implementation is
+`src/duskrpg/game/game.c` (currently: runs `scripts/init.js` on init).
+
+**Key files:** `game.h` (no `.c` in core).
+
+**Review status:** Reviewed 2026-08-01. Confirmed: no `.c` file exists
+in `src/dusk/game/` (only `game.h` + `CMakeLists.txt`) -- a pure
+interface, as intended. The real `src/duskrpg/game/game.c`
+implementation is a thin JS-bootstrap shim: `gameInit` just does
+`errorChain(scriptManagerExecFile("scripts/init.js", NULL))`, while
+`gameUpdate`/`gameDispose` are both empty (`errorOk()` only). Not a
+bug -- consistent with the ongoing migration of game logic into JS --
+but worth flagging as "not yet fleshed out" rather than broken if
+anything is expected to happen there per-frame at the C layer. No
+tests exist for this layer.

.github/workflows/test.yml

@@ -33,3 +33,74 @@ jobs:
             libssl-dev
       - name: Run tests
         run: ./scripts/test-linux.sh
+
+  # Emulator smoke tests: boot the built disc/EBOOT for a fixed window and
+  # confirm the emulator doesn't crash. Not yet verified against a real
+  # runner (no CI run has exercised these) -- continue-on-error so a
+  # flaky/broken emulator step doesn't block the required Linux test job.
+  run-tests-gamecube-dolphin:
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    container:
+      image: ghcr.io/extremscorner/libogc2:latest
+    steps:
+      - name: Install Node.js
+        run: apt-get update && apt-get install -y nodejs
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Install additional dependencies
+        run: |
+          apt-get install -y \
+            python3-pip python3-polib python3-pil \
+            python3-dotenv python3-pyqt5 python3-opengl xorriso \
+            dolphin-emu xvfb
+          dkp-pacman -Syu --noconfirm
+          dkp-pacman -S --needed --noconfirm \
+            gamecube-sdl2 ppc-liblzma ppc-libzip \
+            gamecube-tools ppc-libmad ppc-zlib-ng ppc-bzip2 ppc-zstd
+      - name: Build GameCube ISO and boot it in Dolphin
+        run: ./scripts/test-gamecube-dolphin.sh
+
+  run-tests-wii-dolphin:
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    container:
+      image: ghcr.io/extremscorner/libogc2:latest
+    steps:
+      - name: Install Node.js
+        run: apt-get update && apt-get install -y nodejs
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Install additional dependencies
+        run: |
+          apt-get install -y \
+            python3-pip python3-polib python3-pil \
+            python3-dotenv python3-pyqt5 python3-opengl xorriso \
+            dolphin-emu xvfb
+          dkp-pacman -Syu --noconfirm
+          dkp-pacman -S --needed --noconfirm \
+            gamecube-sdl2 ppc-liblzma ppc-libzip \
+            gamecube-tools ppc-libmad ppc-zlib-ng ppc-bzip2 ppc-zstd
+      - name: Build Wii ISO and boot it in Dolphin
+        run: ./scripts/test-wii-dolphin.sh
+
+  run-tests-psp-ppsspp:
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Setup pspdev
+        uses: ./.github/actions/setup-pspdev
+      - name: Install PPSSPPHeadless build dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y git cmake ninja-build libsdl2-dev zlib1g-dev
+      - name: Build PPSSPPHeadless
+        run: |
+          git clone --recursive --depth 1 https://github.com/hrydgard/ppsspp.git /tmp/ppsspp
+          cmake -S /tmp/ppsspp -B /tmp/ppsspp/build -DCMAKE_BUILD_TYPE=Release
+          cmake --build /tmp/ppsspp/build --target PPSSPPHeadless -- -j$(nproc)
+          echo "PPSSPP_HEADLESS_BIN=/tmp/ppsspp/build/PPSSPPHeadless" >> "$GITHUB_ENV"
+      - name: Build PSP EBOOT and boot it in PPSSPPHeadless
+        run: ./scripts/test-psp-ppsspp.sh

CLAUDE.md

@@ -1,5 +1,9 @@
 # Dusk — Claude Code rules
 
+See `STATUS.md` for a periodically-refreshed inventory of subsystem
+maturity, test coverage gaps, and known open issues — check it before
+assuming a subsystem is fully wired up or before picking a next task.
+
 ## File headers
 Every C, H, and JS file starts with:
 
@@ -124,18 +128,16 @@ Set `DUSK_TARGET_SYSTEM` at CMake configure time to select a platform:
 | `linux`              | `DUSK_LINUX`      | Linux desktop    |
 | `knulli`             | `DUSK_KNULLI`     | Knulli (handheld)|
 | `psp`                | `DUSK_PSP`        | Sony PSP         |
-| `vita`               | `DUSK_VITA`       | PlayStation Vita |
 | `gamecube`           | `DUSK_GAMECUBE`   | Nintendo GameCube|
 | `wii`                | `DUSK_WII`        | Nintendo Wii     |
 
 ### Layer structure
 ```
 src/dusk/          core, platform-agnostic game logic
-src/duskgl/        OpenGL abstraction (Linux, Knulli, PSP, Vita)
+src/duskgl/        OpenGL abstraction (Linux, Knulli, PSP)
-src/dusksdl2/      SDL2 window + input (Linux, Knulli, PSP, Vita)
+src/dusksdl2/      SDL2 window + input (Linux, Knulli, PSP)
 src/dusklinux/     Linux + Knulli platform impl
 src/duskpsp/       PSP platform impl
-src/duskvita/      Vita platform impl
 src/duskdolphin/   GameCube / Wii platform impl (no SDL2/OpenGL)
 ```
 
@@ -190,21 +192,110 @@ simply left undefined — the core guards calls with `#ifdef`.
 ## Adding a new entity component
 1. Create `src/dusk/entity/component/<category>/entityMyComp.h/.c` with
    struct `entityMyComp_t`, `entityMyCompInit()`, and optionally
-   `entityMyCompDispose()`.
+   `entityMyCompDispose()`, `entityMyCompRender()`.
-2. Add the include to `src/dusk/entity/componentlist.h` header block.
+2. Add the include to `src/dusk/entity/componentlist.h` header block
-3. Add a row to `src/dusk/entity/componentlist.h`:
+   (or `src/duskrpg/entity/gamecomponentlist.h` for a game-specific
+   component, appended after the engine's inbuilt ones).
+3. Add a row:
    ```c
    X(MYCOMP, entityMyComp_t, myComp, entityMyCompInit, NULL, NULL)
    ```
-   This auto-generates the enum, union field, and definition entry.
+   Params are `(enumName, type, field, init, dispose, render)` — pass
+   `NULL` for any callback the component doesn't need. This
+   auto-generates the enum, union field, and definition entry.
 4. If JS-facing, create the script module and `.d.ts` (see below).
 
+Entities/components/scenes have no JSON serialize/deserialize path —
+that was removed in favor of building scenes from C-coded prefabs
+(below) or from JerryScript (`Entity`/`Component`/`Scene`, see
+"Adding a new script (JS) module").
+
 ---
 
+## Adding a new entity/scene prefab
+Entity prefabs (`src/dusk/entity/entityprefab.h`) and scene prefabs
+(`src/dusk/scene/sceneprefab.h`) follow the same pattern:
+1. Write an apply function: `errorret_t entityPrefabXxxApply(mgr,
+   entityId)` (or `errorret_t scenePrefabXxxApply(sceneId)`), building
+   up the entity/scene with the normal component/entity APIs.
+2. Add an entry to the sentinel-terminated `ENTITY_PREFABS[]` (in
+   `src/dusk/entity/entityprefablist.h`, or a game-specific list it
+   includes) or `SCENE_PREFABS[]`:
+   ```c
+   { .name = "MY_PREFAB", .extends = "", .apply = entityPrefabXxxApply }
+   ```
+   `extends` names another prefab to apply first (recurses through
+   `entityPrefabResolveAndApply`/`scenePrefabResolveAndApply`), or `""`
+   for none. Do not add an enum or count field — the array is iterated
+   until `.name[0] == '\0'`.
+3. `entityPrefabResolveAndApply`/`scenePrefabResolveAndApply` only
+   resolve names against the C-coded registry above — there is no JSON
+   asset fallback. Throws if no prefab with that name is registered.
+
+---
+
+## Adding a new cutscene item type
+1. Create `src/duskrpg/cutscene/item/<category>/cutsceneMyItem.h/.c`
+   with a data struct (e.g. `cutscenemyitem_t`) and
+   `cutsceneMyItemStart(item, data)` / `cutsceneMyItemUpdate(item,
+   data)` (the latter returns `true` once the item has completed). Add
+   a matching `cutscenemyitemdata_t` runtime-data struct only if the
+   item needs per-run state across ticks (most don't).
+2. Add `CUTSCENE_ITEM_TYPE_MY_ITEM` to the enum and a union member to
+   `cutsceneitem_t` (and `cutsceneitemdata_t` if it has runtime data) in
+   `src/duskrpg/cutscene/item/cutsceneitem.h`.
+3. Register the `{ start, update }` pair in `CUTSCENE_ITEM_CALLBACKS[]`
+   in `cutsceneitem.c`.
+4. Add an authoring macro to `src/duskrpg/cutscene/cutscene.h`:
+   ```c
+   #define CUTSCENE_MY_ITEM(ARGS...) \
+     { .type = CUTSCENE_ITEM_TYPE_MY_ITEM, .myItem = { ARGS } }
+   ```
+   used inside a `CUTSCENE(NAME, SIZE, PAUSE_TYPE, ...)` block.
+
+---
+
+## Save system
+Save data lives under `src/dusk/save/` (`save.h`/`savefile.h`/
+`saveplatform.h`). Slots are fixed-count (`SAVE_FILE_COUNT_MAX`), each
+holding a yyjson document persisted with its byte size and a CRC32
+checksum. `saveLoad`/`saveSave` read/write the JSON fresh every call —
+callers own the returned/passed `yyjson_doc`/`yyjson_mut_doc` and must
+free it themselves. Actual file I/O goes through platform-specific
+`saveplatform_t`/stream hooks (one implementation per platform under
+`src/dusk<platform>/save/`) — do not add direct filesystem calls to the
+core `save.c`, extend the platform stream hooks instead.
+
+## Network system
+`src/dusk/network/` (`network.h`) is a connection-state layer only — a
+`networkstate_t` state machine (`DISCONNECTED`/`CONNECTING`/`CONNECTED`/
+`DISCONNECTING`) plus an HTTP client (`network/http/`) used for one-off
+requests. It is not a multiplayer/replication protocol — that layer
+doesn't exist yet (see `ROADMAP.md` items on the socket server/client
+and packet handlers). Platform-specific connection logic (e.g. PSP's
+`sceNetApctl` polling, GameCube/Wii's `if_config()`) lives under
+`src/dusk<platform>/network/`, wired through `networkplatform.h` macros
+the same way display/input are. Whenever this eventually grows a
+multiplayer protocol, apply `ROADMAP.md`'s principle: never trust
+incoming packet data — validate defensively with `errorret_t`/
+`errorThrow()`, not asserts.
+
 ## Adding a new script (JS) module
+Dusk embeds JerryScript (`src/dusk/script/`, fetched via
+`cmake/modules/Findjerryscript.cmake`). Today only `Entity`, the
+generic `Component` wrapper, and `Scene` are registered (see
+`src/dusk/script/module/modulelist.c`) — no per-component-type typed
+wrappers exist yet (e.g. no `.position` on a `POSITION` component);
+`entity.add(TYPE)`/`entity.getComponent(TYPE)` always return the
+generic `Component`.
+
 1. Create `src/dusk/script/module/<category>/moduleMyMod.h/.c`.
    - Declare `extern scriptproto_t MODULE_MYMOD_PROTO;` in the header.
-   - Use `moduleBaseFunction(name)` to define JS-callable functions.
+   - Use `moduleBaseFunction(name)` to define JS-callable functions —
+     these are the one exception to "no `static` in `.c` files": the
+     macro itself expands to a `static jerry_value_t name(...)`
+     JerryScript external-handler trampoline, never called by name
+     from other C files, so it isn't declared in the `.h`.
    - Register props/funcs in `moduleMyModInit()` with
      `scriptProtoDefineProp` / `scriptProtoDefineFunc` /
      `scriptProtoDefineStaticFunc`.
@@ -212,9 +303,12 @@ simply left undefined — the core guards calls with `#ifdef`.
    `src/dusk/script/module/modulelist.c` and call
    `moduleMyModInit()` in `moduleListInit()` (and `Dispose` in
    `moduleListDispose()`).
-3. For component modules also register in
+3. For a component module that adds a *typed* wrapper for a specific
-   `src/dusk/script/module/entity/component/modulecomponentlist.c`
+   component type, create
-   so `entity.add()` returns the typed wrapper.
+   `src/dusk/script/module/entity/component/modulecomponentlist.c` (it
+   doesn't exist yet — the first such module creates it) so
+   `entity.add()` can return the typed wrapper instead of the generic
+   `Component`.
 4. Create `types/<category>/mymod.d.ts` and add a
    `/// <reference path="..." />` line to `types/index.d.ts`.
 

PSP_OPTIMIZATION_PLAN.md

@@ -0,0 +1,260 @@
+# PSP Optimization Plan
+
+A survey of concrete memory and CPU (especially floating-point) optimization
+opportunities for the PSP target, done 2026-07-31 on branch `ac2` at commit
+`e61914ba` + this session's scripting work. Point-in-time findings, not a
+substitute for reading the referenced source before acting on it.
+
+## Why this exists
+
+The PSP (Allegrex MIPS CPU, 222-333MHz, single core, 32-64MB main RAM, 2MB
+eDRAM, 16KB I-cache / 16KB D-cache, no virtual memory or memory protection)
+is the tightest-constrained target this engine ships to. Two rules guide
+everything below, both already correctly applied in one place in this
+codebase (`entityposition_t` caching its transform matrices instead of
+recomputing them from position/rotation/scale every read — see "Already
+correct" below):
+
+- **Memory is finite and cannot be compacted.** No VM means a fragmented
+  heap after a few minutes of play can fail an allocation even with
+  "enough" total free bytes. Prefer static/pool allocation over
+  malloc/free churn; prefer trading memory for CPU only when the memory
+  cost is bounded and paid once.
+- **CPU is finite and floating-point math is not free**, especially
+  trig/sqrt on the plain scalar FPU. Prefer caching a computed result
+  behind a dirty flag over recomputing it unconditionally; prefer
+  avoiding a sqrt via squared-distance comparison wherever only a
+  yes/no or ordering result is needed.
+
+## Priority 1 — Entity/component memory: a union tax paid on every slot, times 4 scenes
+
+**The single biggest finding.** `entitymanager_t` (`src/dusk/entity/entitymanager.h:11-15`)
+is a flat, statically-sized struct:
+
+```c
+typedef struct entitymanager_t {
+  entity_t entities[ENTITY_COUNT_MAX];                              // 64
+  component_t components[ENTITY_COUNT_MAX * ENTITY_COMPONENT_COUNT_MAX]; // 64*16 = 1024
+  componentid_t entitiesWithComponent[COMPONENT_TYPE_COUNT * ENTITY_COUNT_MAX];
+} entitymanager_t;
+```
+
+`component_t` (`src/dusk/entity/component.h:69-72`) holds a **tagged union**
+(`componentdata_t`) sized to its largest variant. That variant is
+`entityrenderable_t`'s spritebatch payload (`entityrenderable.h:25-66`):
+`spritebatchsprite_t sprites[64]` at 40 bytes each (`vec3 min + vec3 max +
+vec2 uvMin + vec2 uvMax`) = **2560 bytes**, versus ~28-300 bytes for every
+other component type (camera, physics, animation, position, trigger).
+
+Because the union is embedded by value in a flat array — not behind a
+pointer, not sparse — **every one of the 1024 component slots in every
+entity manager costs ~2580 bytes, whether it holds a 28-byte camera or
+nothing at all.** `1024 * 2580 ≈ 2.52MB` per `entitymanager_t`, confirmed
+by the engine's own startup log every run: `Entity manager size: 2684992
+bytes (2622.06 KB)`.
+
+`scene_t` (`src/dusk/scene/scene.h:14-18`) embeds `entitymanager_t` by
+value too, and `SCENE_COUNT_MAX = 4` (`scene/scenebase.h:11`) with
+`SCENE_MANAGER` declared as a plain global (`scene/scene.c:20`) — so this
+~2.52MB exists as static BSS from process start for **all 4 scene slots**,
+used or not. **Total: ~10.1MB reserved permanently for entity storage
+alone** — 16-31% of PSP main RAM — before a single texture, mesh, or audio
+asset is loaded.
+
+**Options to fix (roughly increasing effort/risk):**
+1. Pull `entityrenderablespritebatch_t` out of the component union entirely
+   — store spritebatch entities via a pointer/handle into a separate,
+   smaller fixed pool sized to how many spritebatch-renderable entities
+   actually coexist (almost certainly far fewer than 64 per entity, and
+   far fewer entities need spritebatch at all vs. mesh/material
+   rendering). This alone would shrink the union's dominant variant from
+   ~2560 bytes to whatever the next-largest variant is (~300 bytes,
+   `entitytrigger_t`) — an ~88% reduction, dropping the ~10.1MB down to
+   roughly ~1.2MB.
+2. Reduce `SCENE_COUNT_MAX` from 4 if 4 concurrent scenes were never a
+   deliberate requirement (check with the project owner — this may just
+   be a round-number default nobody revisited), or make scene storage
+   pointer-based/lazily allocated so unused scene slots cost ~0 instead
+   of a full `entitymanager_t`.
+3. Reduce `ENTITY_COMPONENT_COUNT_MAX` (16) if entities realistically use
+   far fewer distinct component types simultaneously — check actual
+   usage across `entityprefablist.h`/`gameprefablist.h` prefabs.
+
+Do (1) first — it's the highest-leverage, most contained change (touches
+`entityrenderable.h`'s data layout and its render/dispose paths, not the
+general entity/component system), and re-measure via the same startup
+log line before deciding whether (2)/(3) are still worth doing.
+
+## Priority 2 — VFPU is completely unused; all vec/mat math is scalar
+
+The PSP's Allegrex CPU has a **VFPU** (vector floating-point unit) capable
+of fast SIMD-style 4-wide float ops and hardware-accelerated matrix
+operations, exposed by pspsdk's `pspvfpu`/GU "Geometry Utility" (`gum_*`)
+helpers. This engine links `pspvfpu` (`cmake/targets/psp.cmake`) but
+**never calls into it** — confirmed via a zero-hit grep for
+`vfpu|pspmath|gum_|vcst|gu_matrix` across `src/duskpsp/` and `src/duskgl/`.
+
+All vector/matrix math instead goes through cglm (`glm_vec3_*`,
+`glm_mat4_*`), which auto-detects SIMD only for x86 (`CGLM_SSE2`/`AVX`) or
+ARM (`CGLM_NEON`) — neither applies to MIPS, and no `CGLM_*` macros are
+set anywhere in this repo (confirmed zero hits). **Every `glm_mat4_mul`,
+every position/rotation rebuild, every physics vector op runs on the
+plain scalar MIPS FPU with the VFPU sitting idle.**
+
+This is the single largest *available* CPU win identified in this survey
+— larger than any specific hot-path fix below, because it's a multiplier
+on all of them. Concretely: route `entityposition.c`'s matrix
+rebuild/multiply path and `physicsworld.c`'s per-body vector math through
+`pspvfpu`/`gum_*` on the PSP build specifically (behind `#ifdef DUSK_PSP`,
+matching the project's existing platform-guard convention), while keeping
+cglm as the portable fallback for Linux/Knulli/GameCube/Wii. This is a
+genuinely large effort (new platform-specific math backend, careful
+correctness verification since VFPU has its own quirks around
+pipelining/hazards) — scope it as its own project, not a quick pass.
+
+## Priority 3 — UI/spritebatch rebuilds and redraws every vertex, every frame
+
+Already flagged in `STATUS.md`/`ROADMAP.md` (item 4/5) as a known open
+issue; this session's research adds concrete numbers. `meshvertex_t`
+(`display/mesh/meshvertex.h:14-17`) is `{ float uv[2]; float pos[3]; }` =
+**20 bytes/vertex**, no packing. `SPRITEBATCH_SPRITES_MAX = 512`,
+`SPRITEBATCH_FLUSH_COUNT = 16` → 32 sprites/flush = 192 vertices = **3,840
+bytes rebuilt and redrawn per flush**, with a flush forced on every
+shader/material change (`spritebatch.c:38-50`) and used unconditionally
+by every widget except `uiconsole.c` (`uitab.c:56`, `uislider.c:183/199/231`,
+final flush in `ui.c:51`). A UI screen with ~50-100 sprites and 2-3
+material changes costs an estimated **8-15KB of vertex rebuild + GU
+submission every single frame**, regardless of whether the UI changed
+since the last frame.
+
+Confirmed on the PSP legacy-GL path specifically: there's no GPU buffer
+re-upload cost (`meshFlushGL` is a literal no-op comment: "we use the
+glClientState stuff" — `meshgl.c:91-93`; `meshDrawGL` just points
+`glVertexPointer` at the CPU-side array each call), so the real cost is
+(a) the CPU-side per-sprite vertex rewrite every frame and (b) GU
+re-transforming the full vertex stream from RAM on every draw with no
+skip for unchanged geometry.
+
+**Fix direction** (already captured in `ROADMAP.md`'s debt backlog item 5):
+extend `uiconsole.c`'s cached-mesh, dirty-flag-gated rebuild pattern to
+the rest of the widget tree. This plan adds one refinement: also consider
+packing `meshvertex_t` down (next item) since it multiplies this cost.
+
+## Priority 4 — All-float vertex format wastes bandwidth and T&L cost
+
+`meshvertex_t` uses two `float` fields (20 bytes) for every mesh and
+sprite vertex, mesh-wide, with no normal or per-vertex color (color is
+already handled at the material level, so that part is already optimal).
+GU natively supports fixed-point 16-bit positions/UVs
+(`GU_VERTEX_16BIT`/`GU_TEXTURE_16BIT`), which would roughly halve
+per-vertex size and the corresponding vertex-fetch/transform cost, at the
+cost of position precision (fine for UI/sprite work and most world
+geometry at this engine's scale; worth checking against the largest
+world coordinates actually used before committing). Pair with Priority 3
+so the packing benefit compounds with the dirty-tracking benefit instead
+of just reducing the cost of a rebuild that still happens every frame.
+
+## Priority 5 — Running gameplay logic in JerryScript has a real per-frame cost on PSP
+
+This is new since last session's work, not a pre-existing issue: `assets/
+scripts/overworldscene.js`'s `update()` is now called every frame via
+`scriptManagerCallGlobal("update")` (wired into `engine.c`'s
+`engineUpdate()`), replacing what used to be a direct `cosf`/`sinf` C
+callback (`entityUpdateAdd`). Per call, `scriptManagerCallGlobal`
+(`scriptmanager.c:91-144`) does: a global-object property lookup (key is
+cached, but the `jerry_object_get` dispatch still runs), full JS
+interpreter call dispatch (frame setup, argument marshaling) for what's a
+two-line function, and an unconditional `jerry_value_is_promise` check
+every call even though `update()` is synchronous. Inside, `Math.cos`/
+`Math.sin` run as JS builtin calls rather than direct libm calls.
+
+Additionally: this project's JerryScript fork is already patched to use
+32-bit float internally (`JERRY_NUMBER_TYPE_FLOAT64=0`,
+`Findjerryscript.cmake`) — a deliberate, already-correct optimization for
+this exact concern — but the *public* engine API (`jerry_value_as_number()`)
+still returns `double`, so every native↔JS boundary crossing (every
+`moduleBaseArgFloat`, every `moduleBaseVec3ToObject`) still pays a
+float→double→float round trip. Also note `JERRY_MATH` is off, so
+`Math.sin`/`cos` fall through to whatever generic libm the platform
+provides rather than JerryScript's own fdlibm implementation — worth
+checking whether turning it on changes anything measurable on PSP.
+
+**This is one `update()` call for one scene-level script today — cheap in
+absolute terms.** It becomes a real problem only if the pattern scales:
+giving many individual entities their own per-frame JS update callback
+would multiply all of the above per entity. **Recommendation: keep
+high-frequency, hot per-entity logic (movement, camera math, physics
+response) in native C update callbacks (`entityUpdateAdd`, the existing
+mechanism), and reserve JS for one-time setup, infrequent/event-driven
+logic, and coarse-grained per-scene orchestration** — which is exactly
+what `require()` and the typed component wrappers built this session are
+suited for, not a per-entity-per-frame hot path. This is a design
+guideline to apply going forward, not a regression to fix in the current
+`overworldscene.js` (one scene-level `update()` call per frame is fine).
+
+## Priority 6 — No pooling/arena allocator; plain malloc/free everywhere
+
+`memoryAllocate`/`memoryFree` (`util/memory.c`) are direct `malloc`/`free`
+passthroughs (`memoryAlign`→`memalign`, `memoryReallocate`/`memoryResize`→
+`realloc`), with the only extra behavior being a global allocation-count
+tracker used solely for test leak detection. No pool, arena, free-list,
+or size-class allocator exists anywhere.
+
+This survey found **no rogue per-frame heap allocations** in the hot
+paths checked (render dispatch in `entityrenderable.c`, all of
+`physics/*.c`) — so this is not an active bug today. But it's a
+structural risk for a no-VM platform over a long play session: any future
+code that does frequent small alloc/free (dynamic lists, string
+building, temp buffers) will fragment the 32-64MB heap with no OS-level
+recovery mechanism. **Recommendation: before adding any new subsystem
+that allocates/frees frequently at runtime (not just at load time),
+default to a fixed-size pool or arena for it**, following the same
+"static, bounded" philosophy already used for `ENTITY_COUNT_MAX`/
+`SCENE_COUNT_MAX`/`ASSET_ENTRY_COUNT_MAX` elsewhere in the engine, rather
+than reaching for `memoryAllocate` per-instance.
+
+## Already correct — don't touch without new evidence
+
+- **`entityposition_t`'s matrix caching** (the pattern the project owner
+  called out as the reason for writing this plan). Verified: a full
+  "dirty" recompute chain (decompose + rebuild local + rebuild world) is
+  ~10 trig calls (`asinf`/`cosf`/`atan2f`) plus at most one 4x4 matrix
+  multiply, and `entityPositionEnsurePRS`/`EnsureLocal`/`EnsureWorld`
+  (`entityposition.c:596-669`) all early-return on a flag check, only
+  doing that work when something actually changed. The cache is correct
+  and clearly worth its ~128-byte-per-entity matrix storage cost.
+- **Physics narrow-phase sqrt avoidance.** All three `sqrtf` call sites
+  in `physicstest.c`/`physicsshapemesh.c` already sit behind a
+  squared-distance early-reject and only compute the real (linear)
+  distance once, when actually needed for penetration depth — no further
+  "use squared distance instead" opportunity was found here.
+- **No allocations in the render/physics hot loop** (Priority 6) — this
+  is good and worth preserving as new code is added to those files.
+- **Asset decompression already runs off the main thread.** Assets are
+  DEFLATE-compressed (not stored) in `dusk.dsk`, so loading pays a real
+  CPU cost for decompression — but every `*LoaderAsync` function
+  (`asset/loader/*/*.c`) runs via `ASSET.loadThread`
+  (`assertNotMainThread` in `asset.c:365`), so this cost is already kept
+  off the main thread. Low priority to change; if load-time CPU cost
+  becomes a measured problem later, revisit stored-vs-compressed as a
+  build-time flag rather than assuming compression is free.
+
+## Suggested approach
+
+1. **Measure before changing.** None of the above have been profiled on
+   real PSP hardware in this pass — this is a source-level survey, not a
+   profile. Before investing in Priority 1 or 2 especially, confirm with
+   an actual PSP build/run (or at minimum the existing "Entity manager
+   size" startup log plus a frame-time counter) that these are the real
+   bottlenecks, not just the largest numbers on paper.
+2. **Priority 1 first** — it's the most contained (one component's data
+   layout), has the clearest before/after metric (the startup log line),
+   and doesn't require new platform-specific code.
+3. **Priority 3 next** (extend the console's dirty-tracking pattern to
+   the rest of the UI) — already scoped in `ROADMAP.md`, no new design
+   needed, just implementation.
+4. **Priority 2 (VFPU) as a dedicated project**, not a quick pass — it's
+   the largest potential win but touches core math plumbing and needs
+   careful correctness verification on real hardware.
+5. Treat Priority 5 as a standing design guideline for all future
+   scripting work, not a one-time fix.

ROADMAP.md

@@ -0,0 +1,104 @@
+# Dusk Roadmap
+
+Tracking upcoming milestones for the engine. See `PSP_OPTIMIZATION_PLAN.md`
+for a memory/CPU optimization survey specifically targeting the PSP build
+(milestone 4 below is its Priority 3).
+
+## Upcoming milestones
+
+1. Add a very basic physics engine, moving away from the current
+   tile-based movement.
+2. Give entities full freedom of movement (no longer locked to tile
+   grid positions).
+3. Update entity interaction, triggers, chunk management, and other
+   systems that currently assume tile-based positioning so they work
+   with the new 3D positioning/movement code.
+4. Investigate and fix poor UI rendering performance. First pass done
+   (2026-07-31): slider/tab/frame/textbox now cache their sprite
+   geometry instead of rebuilding it every frame, and the console's
+   vertex buffer is fixed-size instead of alloc/free churn (see
+   `STATUS.md`'s "UI rendering performance" note for detail). Still
+   open: per-widget material/color changes still force a sprite-batch
+   flush each time (color is per-material, not per-vertex), so a row of
+   alternating highlighted widgets still costs one draw call per
+   widget.
+5. Create UI elements for displaying status indicators, e.g. network
+   connection state and save-in-progress.
+6. Fully test saving end-to-end on all supported platforms.
+7. Remove the tile system from chunks in favor of meshes, with
+   dynamic hitboxes per chunk loaded in from the chunk file data.
+8. Create UI elements for network status: a connecting modal, an
+   error state, and a connected flag. Retire the test HTTP request
+   once these are in place.
+9. Build the socket server and client implementation, including
+   handlers for the different packet types.
+10. Add a dedicated multiplayer entity type, `clientplayer`, alongside
+    the existing `npc` and `player` types. Limit to 8 (defined
+    constant) for now.
+11. Send and receive `clientplayer` position over the network.
+12. Create a UI menu for creating a server and joining a server. For
+    now, join IPs are hard-coded (testing against a fixed IP of
+    10.0.0.94).
+13. Create "handshake" packets. For now, just send the username,
+    enforced to be under 10 characters long.
+14. Server tracks all players' positions and broadcasts them to all
+    connected clients.
+15. Server sends disconnect packets for users who leave.
+16. Server assigns each client a UUID; all clients know every other
+    client's UUID (used to reference them across position updates,
+    disconnect packets, etc).
+17. Server notifies all clients (by UUID) when a user joins, leaves,
+    or is disconnected, so clients can spawn or remove the
+    corresponding `clientplayer` entity in the world.
+
+## Infrastructure / debt backlog
+
+Found during a full-codebase inventory pass (2026-07-30, see `STATUS.md`
+for the full survey). These aren't new feature milestones so much as
+loose ends worth closing, roughly in order of how cheap/safe they are to
+fix:
+
+1. Re-enable `test/item` (currently commented out in
+   `test/CMakeLists.txt`) -- confirm it still passes and turn it back on.
+2. Restore `itemgive.c/h` in `src/duskrpg/item/CMakeLists.txt` -- the
+   textbox UI dependency it was waiting on (`ui/textbox/`) is already
+   back.
+3. Decide the fate of the `vita` target: `scripts/build-vita.sh` and
+   `docker/vita/` reference `-DDUSK_TARGET_SYSTEM=vita`, but no
+   `cmake/targets/vita.cmake` exists, so the build is currently broken.
+   Either implement it or remove the dangling scripts/Dockerfile.
+4. Per-PR CI build coverage for non-Linux targets: first pass added
+   2026-07-31 as `run-tests-gamecube-dolphin`/`run-tests-wii-dolphin`
+   (build the ISO, boot it in Dolphin under Xvfb) and
+   `run-tests-psp-ppsspp` (build the EBOOT, boot it in PPSSPPHeadless)
+   in `.github/workflows/test.yml`, plus matching
+   `scripts/test-*-dolphin.sh`/`scripts/test-psp-ppsspp.sh` (+ `-docker`
+   variants). Marked `continue-on-error: true` since none of these have
+   actually been exercised on a real runner yet -- verify they pass
+   before relying on them, and drop the flag once they do. Knulli still
+   has no per-PR coverage at all.
+5. Milestone 4 above (poor UI rendering performance) has a first pass
+   in (2026-07-31, see `STATUS.md`) -- remaining concrete lead: sprite
+   batch flushes are keyed on shader+material (including tint color),
+   so per-widget color changes (e.g. focus highlight) still force a
+   flush per widget; moving tint to per-vertex color would let a whole
+   row of widgets batch into one draw call regardless of highlight
+   state.
+6. Revisit the GameCube/Wii networking static-IP workaround in
+   `networkdolphin.c` -- it's standing in for an unresolved suspected
+   memory-corruption bug in `if_config()`'s DHCP path.
+7. Decide whether the PSP dialog-based network connect UI needs to come
+   back -- it was removed entirely (not fixed) when the original
+   dialog-tearing bug proved hard to resolve.
+8. Backfill unit tests for the biggest untested surfaces: `ui/` (whole
+   widget framework), `save/`, `script/` (JerryScript bindings), `event/`.
+
+## Principles
+
+- Never trust the network implicitly. Neither side (server or client)
+  should assume the other's packets are well-formed or benign --
+  validate all incoming packet data defensively, since either side
+  may send garbage or malicious data. Use `errorret_t` /
+  `errorThrow()` for these runtime checks, not assert macros --
+  asserts are debug-only and won't guard release builds against
+  malformed or malicious packet data.

STATUS.md

@@ -0,0 +1,120 @@
+# Dusk Engine - Status Snapshot
+
+This is a point-in-time inventory of the codebase's maturity, test coverage,
+and known gaps. It is not auto-maintained -- re-survey periodically (or
+whenever picking a new roadmap milestone) rather than trusting it blindly.
+See `ROADMAP.md` for the ordered feature milestones this status feeds into,
+and `CLAUDE.md` for coding conventions.
+
+Last surveyed: 2026-07-31, at commit `8f8fa8f8`.
+
+## Core engine (`src/dusk/`)
+
+| Subsystem  | Maturity                          | Notes |
+|------------|------------------------------------|-------|
+| asset      | Mature, fully wired                | Model loading's "async" path is actually synchronous (`assetmodelloader.h`) -- only real stub found in core. |
+| script     | Mature for its current scope       | Registered modules: `modulePlatform`, `moduleComponent`/`moduleComponentList` (typed Position/Physics/Renderable wrappers), `moduleEntity`, `moduleScene` (with `Scene.set()` module lifecycle), `moduleMesh`, `moduleTime`, `moduleRequire` (CommonJS-style `require()`/`module.exports`). Entry point is `scripts/init.js`, which does `require('./overworldscene.js')` + `Scene.set()`. Has unit tests (`test/script/`). |
+| entity     | Mature                             | Engine-level prefab lists are empty sentinels; all real prefabs live in `duskrpg`. |
+| scene      | Mature                             | Same prefab-delegation pattern as entity. No JSON serialize/deserialize (removed by design). |
+| save       | Mature, but undocumented           | Slot-based, yyjson + CRC32, platform stream hooks. Not covered in `CLAUDE.md`, no tests. |
+| network    | Connection-state layer only        | HTTP client + connection state machine; no multiplayer/replication protocol (expected -- that's roadmap items 8-17). Not covered in `CLAUDE.md`, has HTTP tests only. |
+| physics    | Mature, recently churned           | Recent revert/re-disable of "old ent code" suggests component wiring around physics isn't fully settled. Well tested. |
+| animation  | Early/mid-stage                    | Keyframes + easing only, no blend trees or state machines. Terse commit history ("ANIM") suggests still iterating. |
+| display    | Most mature/battle-tested          | Backbone of the engine; dominated by platform optimization commits. |
+| ui         | Actively churning, perf pass done  | Widget framework has had features added and ripped out repeatedly (story/battle UI added then removed). No JS bindings yet (from-scratch surface if that's picked up). Sprite-cache pass landed for slider/tab/frame/textbox (see roadmap item 4 below); still no scripted pointer/hit-testing. Has unit tests for the new caching logic (`test/ui/`), but nothing exercises actual draw calls -- see below. |
+| console    | Small, finished for its scope      | Fixed-size cached mesh (no more alloc/free churn), same pattern the rest of `ui/` now follows. |
+| event      | Clean, small, finished             | Pub/sub, rebuilt to replace the old input system. |
+| game       | Intentionally header-only          | Real implementation lives in `duskrpg/game/game.c`. |
+
+### UI rendering performance (roadmap item 4)
+First pass landed 2026-07-31: `uislider`/`uitab` now cache their non-text
+quads (track/fill/markers, tab background) relative to origin and only
+rebuild on state change, translating into position at draw time.
+`uiframe.c` grew `uiFrameDrawCached()`, which skips rebuilding its 9-slice
+sprites when x/y/width/height match the last call; wired into the
+confirm dialog, settings panel, and textbox (each owns its own
+`uiframecache_t`). `uitextbox` no longer does one `spriteBatchBuffer` call
+per visible glyph -- it builds a per-page glyph cache once and slices a
+prefix by scroll each frame. `uiconsole` dropped its alloc/free vertex
+buffer for a fixed 512-glyph array. `uifps` skips its label rebuild when
+the formatted FPS string hasn't changed.
+
+Still open: every widget still issues its own `spriteBatchBuffer` call
+per material/color, so a row of alternating highlighted/plain widgets
+still forces a GPU flush per widget (color is applied via material, not
+per-vertex) -- that's the next real win if PSP framerate is still an
+issue. No scripted pointer/hit-testing exists either; input is still
+100% gamepad/keyboard directional-focus (`ui/focus/`).
+
+Test coverage caveat: `test/ui/` and `test/display/test_spritebatchsprite.c`
+cover the new caching *logic* (geometry math, exercised by constructing
+widget structs directly) but cannot exercise `uiXxxDraw()`/`uiFrameDraw()`
+themselves -- those need `FONT_DEFAULT`/`UI_FRAME`'s GL texture, which
+needs a live GL context this test binary doesn't have (confirmed: calling
+`fontInitDefault()` in a test asserts in `texturegl.c`). This is true of
+the whole rendering layer, not something newly introduced -- there's no
+GL-backed test harness anywhere in the repo yet.
+
+## Game layer (`src/duskrpg/`)
+
+Actively maintained, not orphaned (despite an old "remove rpg" commit deep
+in history) -- last touched the same day as this survey.
+
+- **cutscene/** -- actively developed, matches `CLAUDE.md`'s documented
+  recipe exactly. 16 registered item types.
+- **entity/, scene/** -- overworld player/camera/interactable components
+  and prefabs, active.
+- **item/** -- `item.c`/`inventory.c`/`backpack.c` built via a working
+  `item.json` -> `itemdef.h` codegen pipeline. `itemgive.c/h` exist on
+  disk but are explicitly excluded from the CMake build pending textbox
+  UI restoration -- **that UI (`ui/textbox/`) is already restored**, so
+  this looks like an overdue follow-up, not a real blocker.
+- **input/** -- headers only, no implementation. Contains the one
+  genuine TODO found in the whole `duskrpg` tree: `// TODO: Wiimote, USB
+  Keyboard, probably more.`
+- **ui/** -- textbox restored and built; `uitestlabel.c/h` is an
+  intentional smoke-test scaffold, not dead code.
+
+## Platform layers
+
+| Platform     | Status |
+|--------------|--------|
+| duskgl / dusksdl2 | Complete, shared by Linux/Knulli/PSP, no gaps found. |
+| dusklinux    | Complete, well-trodden. |
+| duskpsp      | Complete for current design. The historical dialog/tearing bug (see memory `project_psp_dialog_tearing` etc.) was **not fixed -- the dialog-based connect UI was removed entirely** (commit `d7982599`, "Simplified PSP network") in favor of a silent profile-based connect. Revisit if the dialog UX is still wanted. |
+| duskdolphin (GameCube/Wii) | Functional, not a stub -- real GX-based display/mesh/shader/texture. Wii input uses only the GameCube `PAD_*` library; no WPAD/Wiimote support (`inputdolphin.h` has `#error "Wii not implemented"` gated behind macros that are never defined, so currently dormant, not a live build break). `networkdolphin.c` hardcodes a static IP as an explicit temporary workaround for a suspected DHCP-related memory-corruption bug in `if_config()` -- root cause still open. |
+| vita         | **Referenced by `scripts/build-vita.sh` and `docker/vita/` but no `cmake/targets/vita.cmake` exists** -- the build target is broken/unfinished at the CMake level. |
+
+### CI coverage gap
+`.github/workflows/test.yml` only builds+tests Linux, on PRs to `main`.
+`build.yml` builds all other platforms (PSP, Knulli, GameCube, Wii +
+ISO variants) but **only on tag push** (release time). Vita and Dolphin
+aren't in CI at all. Net effect: regressions on 4+ platforms can land
+silently until a release tag is cut.
+
+## Test coverage gaps
+
+Core `src/dusk/` subsystems with **zero** unit tests: `console`,
+`engine`, `event`, `game`, `input`, `log`, `save`, `script` (+ all JS
+module bindings), `system`, `ui` (entire widget framework).
+
+`src/duskrpg/` has almost no test coverage: `test/item/test_inventory.c`
+exists but **`add_subdirectory(item)` is commented out in
+`test/CMakeLists.txt`**, so even that one test never runs. `cutscene`,
+`entity`, `game`, `input`, `scene`, `ui` under `duskrpg` have no tests at
+all.
+
+No stale tests were found referencing deleted systems (old JSON
+serialize/deserialize, old event/cutscene modules) -- the test suite is
+internally consistent with current code, just incomplete in coverage.
+
+## Build/tooling gaps worth knowing about
+
+- `assetsraw/` -> `assets/` (chunk JSON -> `.dcf`) is a manual/editor-only
+  step (`tools.asset.chunk`), not part of the CMake build -- committed
+  `.dcf` files can silently drift from their raw source.
+- Several Python tool packages exist but aren't wired into any build:
+  `tools/color/csv/`, `tools/asset/chunk_json/`, `tools/asset/dmf/`,
+  `tools/asset/tiles/`, `tools/input/csv/`. Some may be superseded by
+  `tools/color.py`/`tools/item.py`; worth a pass to confirm which are
+  live vs leftover.

assets/cutscene/test_npc.json

@@ -1,25 +0,0 @@
-{
-  "pause": "DEFAULT",
-  "items": [
-    { "type": "text", "text": "Test Two." },
-    { "type": "entityAdd", "entityType": "npc", "position": [4, 4, 0] },
-    {
-      "type": "textMini",
-      "text": "Hello!",
-      "position": [4, 4, 0],
-      "duration": 3.0
-    },
-    {
-      "type": "emoji",
-      "entityIndex": "lastCreated",
-      "emojiType": "exclamation",
-      "duration": 2.0
-    },
-    {
-      "type": "entityWalkTo",
-      "entityIndex": "lastCreated",
-      "positions": [[8, 2, 0]]
-    },
-    { "type": "text", "text": "Done." }
-  ]
-}

assets/map/testmap/chunks/-1_0_0.json

@@ -1 +0,0 @@
-{"tiles": [[1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0]], "meshes": [{"model": "models/chunks/chunk_-1_0_0_0.json", "offset": [0.0, 0.0, 0.0]}, {"model": "models/buildings/house_4_4.json", "offset": [2.0, 1.0, 0.0]}, {"model": "models/buildings/house_6_3.json", "offset": [1.0, 9.0, 0.0]}, {"model": "models/buildings/house_2_2.json", "offset": [12.0, 6.0, 0.0]}]}

assets/map/testmap/chunks/0_1_0.json

@@ -1 +0,0 @@
-{"tiles": [[1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0]], "meshes": [{"model": "models/chunks/chunk_0_1_0_0.json", "offset": [0.0, 0.0, 0.0]}, {"model": "models/buildings/house_8_4.json", "offset": [1.0, 1.0, 0.0]}, {"model": "models/buildings/house_3_3.json", "offset": [11.0, 2.0, 0.0]}, {"model": "models/buildings/house_2_2.json", "offset": [3.0, 11.0, 0.0]}]}

assets/map/testmap/chunks/1_0_0.json

@@ -1 +0,0 @@
-{"tiles": [[1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0]], "meshes": [{"model": "models/chunks/chunk_1_0_0_0.json", "offset": [0.0, 0.0, 0.0]}, {"model": "models/buildings/house_3_2.json", "offset": [1.0, 1.0, 0.0]}, {"model": "models/buildings/house_2_3.json", "offset": [7.0, 2.0, 0.0]}, {"model": "models/buildings/house_4_2.json", "offset": [1.0, 8.0, 0.0]}, {"model": "models/buildings/house_1_1.json", "offset": [11.0, 10.0, 0.0]}, {"model": "models/buildings/house_5_2.json", "offset": [13.0, 6.0, 0.0]}]}

assets/map/testmap/chunks/1_1_0.json

@@ -1 +0,0 @@
-{"tiles": [[1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0]], "meshes": [{"model": "models/chunks/chunk_1_1_0_0.json", "offset": [0.0, 0.0, 0.0]}, {"model": "models/buildings/house_5_5.json", "offset": [3.0, 2.0, 0.0]}, {"model": "models/buildings/house_2_3.json", "offset": [10.0, 3.0, 0.0]}, {"model": "models/buildings/house_3_1.json", "offset": [1.0, 12.0, 0.0]}]}

assets/map/testmap/chunks/2_0_0.json

@@ -1 +0,0 @@
-{"tiles": [[1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 3], [1, 3], [1, 3], [1, 3], [1, 3], [1, 3], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 3], [1, 3], [1, 3], [1, 3], [1, 3], [1, 3], [1, 0], [1, 0], [1, 0], [1, 0], [0, 0], [0, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 3], [1, 3], [1, 3], [1, 3], [1, 3], [1, 3], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [4, 1], [4, 1], [4, 1], [4, 1], [4, 1], [4, 1], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [4, 0], [4, 0], [4, 0], [4, 0], [4, 0], [4, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0]], "meshes": [{"model": "models/chunks/chunk_2_0_0_0.json", "offset": [0.0, 0.0, 0.0]}]}

assets/map/testmap/map.json

@@ -1,13 +0,0 @@
-{
-  "name": "Test Map",
-  "entities": [
-    { "type": "player", "position": [10, 2, 0], "direction": "north" },
-    { "type": "item", "position": [12, 2, 0], "item": "POTION", "quantity": 1 },
-    {
-      "type": "npc",
-      "position": [8, 8, 1],
-      "path": [[4, 4, 0], [10, 10, 1], [4, 4, 0], [10, 10, 1]],
-      "cutscene": "test_npc"
-    }
-  ]
-}

assets/scripts/init.js

@@ -0,0 +1,9 @@
+// Copyright (c) 2026 Dominic Masters
+//
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+// Entry point run once at startup (see game.c). Swap which scene module
+// gets passed to Scene.set() here to change what the game boots into.
+var overworldScene = require('./overworldscene.js');
+Scene.set(overworldScene);

assets/scripts/overworldscene.js

@@ -0,0 +1,85 @@
+// Copyright (c) 2026 Dominic Masters
+//
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+// Radius must stay well outside the floor's footprint (a 20x20 plane has a
+// corner-to-center distance of 10*sqrt(2) =~ 14.1) -- orbiting inside that
+// puts parts of the floor's own geometry near/behind the camera's view
+// direction, which the PSP's legacy GU pipeline can't clip properly and
+// drops the whole triangle instead of clipping it.
+var CAMERA_ORBIT_RADIUS = 18.0;
+var CAMERA_ORBIT_HEIGHT = 10.0;
+var CAMERA_ORBIT_SPEED = 0.5;
+
+var cameraOrbitAngle = 0.0;
+var cameraPosition = null;
+
+// Orbits the camera around the world origin at a fixed radius/height/
+// speed, always looking back at the origin. Called once up front (so the
+// very first rendered frame is already positioned correctly) and then
+// once per frame via update() below.
+function updateCameraOrbit() {
+  cameraOrbitAngle += Time.delta * CAMERA_ORBIT_SPEED;
+
+  var eyeX = Math.cos(cameraOrbitAngle) * CAMERA_ORBIT_RADIUS;
+  var eyeY = CAMERA_ORBIT_HEIGHT;
+  var eyeZ = Math.sin(cameraOrbitAngle) * CAMERA_ORBIT_RADIUS;
+
+  cameraPosition.lookAt(eyeX, eyeY, eyeZ, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
+}
+
+module.exports = {
+  // Called once by Scene.set(), right after it creates and activates the
+  // scene this module owns.
+  init: function() {
+    // Camera, orbiting the origin (see updateCameraOrbit above).
+    var camera = new Entity();
+    cameraPosition = camera.add(POSITION);
+    camera.add(CAMERA);
+    updateCameraOrbit();
+
+    // Static ground plane. Physics ignores the entity's position
+    // component -- the shape's own normal/distance fully define the
+    // plane in world space.
+    var plane = new Entity();
+    var planePosition = plane.add(POSITION);
+    planePosition.setLocalPosition(-10.0, 0.0, -10.0);
+    planePosition.setLocalScale(20.0, 1.0, 20.0);
+
+    var planePhysics = plane.add(PHYSICS);
+    planePhysics.setBodyType(PHYSICS_BODY_STATIC);
+    planePhysics.setShape(PHYSICS_SHAPE_PLANE, 0.0, 1.0, 0.0, 0.0);
+
+    var planeRenderable = plane.add(RENDERABLE);
+    planeRenderable.setMesh(0, MESH_PLANE);
+    planeRenderable.setColor(128, 128, 128, 255);
+
+    // Player: dynamic capsule body, moved relative to the camera by
+    // PLAYER's own update callback (see entityplayer.c).
+    var player = new Entity();
+    var playerPosition = player.add(POSITION);
+    playerPosition.setLocalPosition(0.0, 2.0, 0.0);
+
+    var playerPhysics = player.add(PHYSICS);
+    playerPhysics.setShape(PHYSICS_SHAPE_CAPSULE, 0.5, 0.5);
+
+    var playerRenderable = player.add(RENDERABLE);
+    playerRenderable.setMesh(0, MESH_CAPSULE);
+    playerRenderable.setColor(0, 0, 255, 255);
+
+    player.add(PLAYER);
+  },
+
+  // Called once per engine frame while this module is the active scene
+  // (see Scene.set(), engineUpdate() -> moduleSceneUpdateCurrent()).
+  update: function() {
+    if(cameraPosition) updateCameraOrbit();
+  },
+
+  // Called once by Scene.set() when this module is replaced by another,
+  // right before the scene it owns is destroyed.
+  dispose: function() {
+    cameraPosition = null;
+  }
+};

cmake/modules/Findjerryscript.cmake

@@ -0,0 +1,96 @@
+# Copyright (c) 2026 Dominic Masters
+#
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# Turn things off we don't need
+set(JERRY_CMDLINE OFF CACHE BOOL "" FORCE)
+set(JERRY_EXT ON CACHE BOOL "" FORCE)
+set(JERRY_DEBUGGER OFF CACHE BOOL "" FORCE)
+set(JERRY_BUILTIN_DATE OFF CACHE BOOL "" FORCE)
+set(ENABLE_LTO OFF CACHE BOOL "" FORCE)
+
+# Fetch Jerry
+include(FetchContent)
+FetchContent_Declare(
+  jerryscript
+  GIT_REPOSITORY https://git.wish.moe/YourWishes/jerryscript
+  GIT_TAG float32-fix
+)
+FetchContent_MakeAvailable(jerryscript)
+
+# Mark found
+set(jerryscript_FOUND ON)
+
+# Define targets
+if(TARGET jerryscript-core)
+  set(JERRY_CORE_TARGET jerryscript-core)
+elseif(TARGET jerry-core)
+  set(JERRY_CORE_TARGET jerry-core)
+endif()
+
+if(TARGET jerryscript-ext)
+  set(JERRY_EXT_TARGET jerryscript-ext)
+elseif(TARGET jerry-ext)
+  set(JERRY_EXT_TARGET jerry-ext)
+endif()
+
+if(TARGET jerryscript-port-default)
+  set(JERRY_PORT_TARGET jerryscript-port-default)
+elseif(TARGET jerry-port-default)
+  set(JERRY_PORT_TARGET jerry-port-default)
+elseif(TARGET jerryscript-port)
+  set(JERRY_PORT_TARGET jerryscript-port)
+elseif(TARGET jerry-port)
+  set(JERRY_PORT_TARGET jerry-port)
+endif()
+
+if(NOT JERRY_CORE_TARGET)
+  message(FATAL_ERROR "JerryScript core target not found")
+endif()
+
+if(NOT JERRY_EXT_TARGET)
+  message(FATAL_ERROR "JerryScript ext target not found")
+endif()
+
+if(NOT JERRY_PORT_TARGET)
+  message(FATAL_ERROR "JerryScript port target not found")
+endif()
+
+foreach(tgt IN ITEMS
+  ${JERRY_CORE_TARGET}
+  ${JERRY_EXT_TARGET}
+  ${JERRY_PORT_TARGET}
+)
+  if(TARGET ${tgt})
+    set_property(TARGET ${tgt} PROPERTY INTERPROCEDURAL_OPTIMIZATION OFF)
+    target_compile_definitions(${JERRY_CORE_TARGET} PRIVATE
+      JERRY_NUMBER_TYPE_FLOAT64=0
+      JERRY_BUILTIN_DATE=0
+    )
+  endif()
+endforeach()
+
+# Export include dirs through the targets
+target_include_directories(${JERRY_CORE_TARGET} INTERFACE
+  ${jerryscript_SOURCE_DIR}/jerry-core/include
+)
+
+target_include_directories(${JERRY_EXT_TARGET} INTERFACE
+  ${jerryscript_SOURCE_DIR}/jerry-ext/include
+)
+
+target_include_directories(${JERRY_PORT_TARGET} INTERFACE
+  ${jerryscript_SOURCE_DIR}/jerry-port/default/include
+)
+
+# Suppress JerryScript-only warning
+if(CMAKE_C_COMPILER_ID MATCHES "GNU|Clang")
+  target_compile_options(${JERRY_CORE_TARGET} PRIVATE
+    -Wno-error
+  )
+endif()
+
+add_library(jerryscript::core ALIAS ${JERRY_CORE_TARGET})
+add_library(jerryscript::ext ALIAS ${JERRY_EXT_TARGET})
+add_library(jerryscript::port ALIAS ${JERRY_PORT_TARGET})

cmake/targets/gamecube.cmake

@@ -6,7 +6,7 @@ target_compile_definitions(${DUSK_LIBRARY_TARGET_NAME} PUBLIC
 
 # Link libraries
 target_link_libraries(${DUSK_LIBRARY_TARGET_NAME} PRIVATE
-  # bba
+  bba
 )
 
 # ISO post-build: produce NTSC-J, NTSC-U and PAL disc images

cmake/targets/psp.cmake

@@ -1,3 +1,7 @@
+if(NOT CMAKE_BUILD_TYPE)
+  set(CMAKE_BUILD_TYPE Release CACHE STRING "Build type" FORCE)
+endif()
+
 set(CMAKE_AR "$ENV{PSPDEV}/bin/psp-ar" CACHE FILEPATH "" FORCE)
 set(CMAKE_RANLIB "$ENV{PSPDEV}/bin/psp-ranlib" CACHE FILEPATH "" FORCE)
 set(CMAKE_C_COMPILER_AR "$ENV{PSPDEV}/bin/psp-ar" CACHE FILEPATH "" FORCE)
@@ -55,16 +59,9 @@ target_compile_definitions(${DUSK_BINARY_TARGET_NAME} PUBLIC
   DUSK_DISPLAY_WIDTH=480
   DUSK_DISPLAY_HEIGHT=272
   DUSK_THREAD_PTHREAD
-  DUSK_TIME_DYNAMIC
   DUSK_DISPLAY_OVERSCAN=6
 )
 
-if(NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
-  target_compile_definitions(${DUSK_BINARY_TARGET_NAME} PUBLIC
-    DUSK_ASSERTIONS_FAKED
-  )
-endif()
-
 # Postbuild, create .pbp file for PSP.
 create_pbp_file(
   TARGET "${DUSK_BINARY_TARGET_NAME}"

cmake/targets/vita.cmake

@@ -1,88 +0,0 @@
-# Copyright (c) 2026 Dominic Masters
-#
-# This software is released under the MIT License.
-# https://opensource.org/licenses/MIT
-
-if(NOT DEFINED ENV{VITASDK})
-  message(FATAL_ERROR "VITASDK environment variable is not set.")
-endif()
-
-include("$ENV{VITASDK}/share/vita.cmake" REQUIRED)
-
-set(VITA_APP_NAME "Dusk")
-set(VITA_TITLEID "DUSK00001")
-set(VITA_VERSION "01.00")
-
-find_package(SDL2 REQUIRED)
-
-# Custom flags for cglm
-set(CGLM_SHARED OFF CACHE BOOL "Build cglm shared" FORCE)
-set(CGLM_STATIC ON  CACHE BOOL "Build cglm static" FORCE)
-find_package(cglm REQUIRED)
-
-# Link libraries
-target_link_libraries(${DUSK_LIBRARY_TARGET_NAME} PUBLIC
-  ${SDL2_LIBRARIES}
-  cglm
-  SDL2
-  SDL2main
-  zip
-  bz2
-  z
-  zstd
-  crypto
-  lzma
-  m
-  pthread
-  stdc++
-  vitaGL
-  mathneon
-  vitashark
-  kubridge_stub
-  SceAppMgr_stub
-  SceAudio_stub
-  SceCtrl_stub
-  SceCommonDialog_stub
-  SceDisplay_stub
-  SceKernelDmacMgr_stub
-  SceGxm_stub
-  SceShaccCg_stub
-  SceSysmodule_stub
-  ScePower_stub
-  SceTouch_stub
-  SceVshBridge_stub
-  SceIofilemgr_stub
-  SceShaccCgExt
-  libtaihen_stub.a
-
-
-  # SceKernel_stub
-  SceAppUtil_stub
-  SceHid_stub
-  SceRtc_stub
-)
-
-target_include_directories(${DUSK_LIBRARY_TARGET_NAME} PRIVATE
-  ${SDL2_INCLUDE_DIRS}
-)
-
-target_compile_definitions(${DUSK_LIBRARY_TARGET_NAME} PUBLIC
-  DUSK_SDL2
-  DUSK_OPENGL
-  DUSK_VITA
-  DUSK_INPUT_GAMEPAD
-  DUSK_PLATFORM_ENDIAN_LITTLE
-  DUSK_OPENGL_LEGACY
-  DUSK_DISPLAY_WIDTH=960
-  DUSK_DISPLAY_HEIGHT=544
-)
-
-# Post-build: create SELF from the ELF binary (UNSAFE = homebrew, no signing)
-vita_create_self(${DUSK_BINARY_TARGET_NAME}.self ${DUSK_BINARY_TARGET_NAME} UNSAFE)
-
-# Post-build: package SELF + assets into a .vpk installable on the Vita
-vita_create_vpk(${DUSK_BINARY_TARGET_NAME}.vpk ${VITA_TITLEID} ${DUSK_BINARY_TARGET_NAME}.self
-  VERSION ${VITA_VERSION}
-  NAME ${VITA_APP_NAME}
-  FILE ${DUSK_ASSETS_ZIP} dusk.dsk
-)

docker/dolphin-test/Dockerfile

@@ -0,0 +1,7 @@
+FROM ghcr.io/extremscorner/libogc2
+WORKDIR /workdir
+RUN apt update && \
+    dkp-pacman -Syu --noconfirm && \
+    apt install -y python3 python3-pip python3-polib python3-pil python3-dotenv python3-pyqt5 python3-opengl xorriso dolphin-emu xvfb && \
+    dkp-pacman -S --needed --noconfirm gamecube-sdl2 ppc-liblzma ppc-libzip libogc2 gamecube-tools ppc-libmad ppc-zlib-ng ppc-liblzma ppc-bzip2 ppc-zstd
+VOLUME ["/workdir"]

docker/psp-test/Dockerfile

@@ -0,0 +1,28 @@
+FROM pspdev/pspdev:latest
+WORKDIR /workdir
+RUN apk add --no-cache \
+  python3 \
+  py3-pip \
+  py3-dotenv \
+  git \
+  cmake \
+  make \
+  g++ \
+  sdl2-dev \
+  zlib-dev \
+  linux-headers
+
+# PPSSPP has no Alpine/Linux distro package -- build the "PPSSPPHeadless"
+# target (the CLI/no-window build PPSSPP's own CI uses for automated runs)
+# from source instead. The target name and exact CMake options have moved
+# around across PPSSPP versions -- if this breaks, check
+# https://github.com/hrydgard/ppsspp's CMakeLists.txt for the current name.
+RUN git clone --recursive --depth 1 \
+    https://github.com/hrydgard/ppsspp.git /opt/ppsspp && \
+  cd /opt/ppsspp && \
+  cmake -B build -DCMAKE_BUILD_TYPE=Release && \
+  cmake --build build --target PPSSPPHeadless -- -j$(nproc) && \
+  cp build/PPSSPPHeadless /usr/local/bin/PPSSPPHeadless && \
+  rm -rf /opt/ppsspp
+
+VOLUME ["/workdir"]

scripts/test-gamecube-dolphin-docker.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+docker build -t dusk-dolphin-test -f docker/dolphin-test/Dockerfile .
+docker run --rm -v "$(pwd):/workdir" dusk-dolphin-test /bin/bash -c "./scripts/test-gamecube-dolphin.sh"

scripts/test-gamecube-dolphin.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+set -e
+
+if [ -z "$DEVKITPRO" ]; then
+  echo "DEVKITPRO environment variable is not set. Please set it to the path of your DEVKITPRO installation."
+  exit 1
+fi
+
+DOLPHIN_BIN="${DOLPHIN_BIN:-dolphin-emu}"
+if ! command -v "$DOLPHIN_BIN" >/dev/null 2>&1; then
+  echo "$DOLPHIN_BIN not found. Install Dolphin Emulator (e.g. 'apt install dolphin-emu')"
+  echo "or set DOLPHIN_BIN to its path."
+  exit 1
+fi
+if ! command -v xvfb-run >/dev/null 2>&1; then
+  echo "xvfb-run not found. Install it (e.g. 'apt install xvfb') -- Dolphin's"
+  echo "Qt frontend needs a display even in batch mode."
+  exit 1
+fi
+
+./scripts/build-gamecube-iso.sh
+
+DUSK_TEST_DOLPHIN_SECONDS="${DUSK_TEST_DOLPHIN_SECONDS:-20}"
+ISO="build-gamecube-iso/Dusk-NTSC-U.iso"
+
+echo "Booting $ISO in Dolphin for up to ${DUSK_TEST_DOLPHIN_SECONDS}s (batch mode, headless via Xvfb)..."
+
+# Dolphin's batch mode (-b -e) runs the disc until told to stop -- there's
+# no "the game exited cleanly" signal to wait for, so we bound it with
+# timeout and treat "still running when the clock ran out" as success.
+set +e
+xvfb-run -a timeout "${DUSK_TEST_DOLPHIN_SECONDS}" "$DOLPHIN_BIN" -b -e "$ISO"
+status=$?
+set -e
+
+# timeout returns 124 when it had to kill Dolphin after the duration
+# elapsed -- that means the disc booted and kept running, the expected
+# smoke-test-passed outcome, not a failure. Any other non-zero status
+# means Dolphin crashed or refused to boot the disc.
+if [ "$status" -ne 0 ] && [ "$status" -ne 124 ]; then
+  echo "Dolphin exited with unexpected status $status -- treating as a failure."
+  exit "$status"
+fi
+
+echo "GameCube smoke test passed (Dolphin ran $ISO for ${DUSK_TEST_DOLPHIN_SECONDS}s without crashing)."

scripts/test-psp-ppsspp-docker.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+docker build -t dusk-psp-test -f docker/psp-test/Dockerfile .
+docker run --rm -v "$(pwd):/workdir" dusk-psp-test /bin/bash -c "./scripts/test-psp-ppsspp.sh"

scripts/test-psp-ppsspp.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+set -e
+
+if [ -z "$PSPDEV" ]; then
+  echo "PSPDEV environment variable is not set. Please set it to the path of your PSP development environment."
+  exit 1
+fi
+
+# PPSSPP doesn't ship a standard Linux package -- build its "PPSSPPHeadless"
+# target from source (https://github.com/hrydgard/ppsspp) and either put it
+# on PATH or point PPSSPP_HEADLESS_BIN at it. See docker/psp-test/Dockerfile
+# for a from-scratch build.
+PPSSPP_HEADLESS_BIN="${PPSSPP_HEADLESS_BIN:-PPSSPPHeadless}"
+if ! command -v "$PPSSPP_HEADLESS_BIN" >/dev/null 2>&1; then
+  echo "$PPSSPP_HEADLESS_BIN not found. Build PPSSPP's 'PPSSPPHeadless' target"
+  echo "from source or set PPSSPP_HEADLESS_BIN to its path."
+  exit 1
+fi
+
+./scripts/build-psp.sh
+
+DUSK_TEST_PPSSPP_SECONDS="${DUSK_TEST_PPSSPP_SECONDS:-20}"
+EBOOT="build-psp/EBOOT.PBP"
+
+echo "Booting $EBOOT in PPSSPPHeadless (timeout ${DUSK_TEST_PPSSPP_SECONDS}s)..."
+
+# PPSSPPHeadless is purpose-built for automated/CI runs -- it renders
+# without a window and is expected to exit on its own once --timeout
+# elapses, unlike Dolphin's batch mode which has to be killed externally.
+# Check `"$PPSSPP_HEADLESS_BIN" --help` if these flags don't match your
+# PPSSPP checkout -- the headless CLI has changed across versions.
+set +e
+"$PPSSPP_HEADLESS_BIN" --timeout="${DUSK_TEST_PPSSPP_SECONDS}" "$EBOOT"
+status=$?
+set -e
+
+if [ "$status" -ne 0 ]; then
+  echo "PPSSPPHeadless exited with status $status"
+  exit "$status"
+fi
+
+echo "PSP smoke test passed (PPSSPPHeadless ran EBOOT.PBP for ${DUSK_TEST_PPSSPP_SECONDS}s without crashing)."

scripts/test-wii-dolphin-docker.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+docker build -t dusk-dolphin-test -f docker/dolphin-test/Dockerfile .
+docker run --rm -v "$(pwd):/workdir" dusk-dolphin-test /bin/bash -c "./scripts/test-wii-dolphin.sh"

scripts/test-wii-dolphin.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+set -e
+
+if [ -z "$DEVKITPRO" ]; then
+  echo "DEVKITPRO environment variable is not set. Please set it to the path of your DEVKITPRO installation."
+  exit 1
+fi
+
+DOLPHIN_BIN="${DOLPHIN_BIN:-dolphin-emu}"
+if ! command -v "$DOLPHIN_BIN" >/dev/null 2>&1; then
+  echo "$DOLPHIN_BIN not found. Install Dolphin Emulator (e.g. 'apt install dolphin-emu')"
+  echo "or set DOLPHIN_BIN to its path."
+  exit 1
+fi
+if ! command -v xvfb-run >/dev/null 2>&1; then
+  echo "xvfb-run not found. Install it (e.g. 'apt install xvfb') -- Dolphin's"
+  echo "Qt frontend needs a display even in batch mode."
+  exit 1
+fi
+
+./scripts/build-wii-iso.sh
+
+DUSK_TEST_DOLPHIN_SECONDS="${DUSK_TEST_DOLPHIN_SECONDS:-20}"
+ISO="build-wii-iso/Dusk-NTSC-U.iso"
+
+echo "Booting $ISO in Dolphin for up to ${DUSK_TEST_DOLPHIN_SECONDS}s (batch mode, headless via Xvfb)..."
+
+# Dolphin's batch mode (-b -e) runs the disc until told to stop -- there's
+# no "the game exited cleanly" signal to wait for, so we bound it with
+# timeout and treat "still running when the clock ran out" as success.
+set +e
+xvfb-run -a timeout "${DUSK_TEST_DOLPHIN_SECONDS}" "$DOLPHIN_BIN" -b -e "$ISO"
+status=$?
+set -e
+
+# timeout returns 124 when it had to kill Dolphin after the duration
+# elapsed -- that means the disc booted and kept running, the expected
+# smoke-test-passed outcome, not a failure. Any other non-zero status
+# means Dolphin crashed or refused to boot the disc.
+if [ "$status" -ne 0 ] && [ "$status" -ne 124 ]; then
+  echo "Dolphin exited with unexpected status $status -- treating as a failure."
+  exit "$status"
+fi
+
+echo "Wii smoke test passed (Dolphin ran $ISO for ${DUSK_TEST_DOLPHIN_SECONDS}s without crashing)."

src/CMakeLists.txt

@@ -4,6 +4,7 @@
 # https://opensource.org/licenses/MIT
 
 add_subdirectory(dusk)
+add_subdirectory(duskrpg)
 
 if(DUSK_TARGET_SYSTEM STREQUAL "linux" OR DUSK_TARGET_SYSTEM STREQUAL "knulli")
   add_subdirectory(dusklinux)
@@ -15,11 +16,6 @@ elseif(DUSK_TARGET_SYSTEM STREQUAL "psp")
   add_subdirectory(dusksdl2)
   add_subdirectory(duskgl)
 
-elseif(DUSK_TARGET_SYSTEM STREQUAL "vita")
-  add_subdirectory(duskvita)
-  add_subdirectory(dusksdl2)
-  add_subdirectory(duskgl)
-
 elseif(DUSK_TARGET_SYSTEM STREQUAL "wii" OR DUSK_TARGET_SYSTEM STREQUAL "gamecube")
   add_subdirectory(duskdolphin)
   

src/dusk/CMakeLists.txt

@@ -32,6 +32,15 @@ if(NOT yyjson_FOUND)
   endif()
 endif()
 
+if(NOT jerryscript_FOUND)
+  find_package(jerryscript REQUIRED)
+  target_link_libraries(${DUSK_LIBRARY_TARGET_NAME} PUBLIC
+    jerryscript::core
+    jerryscript::ext
+    jerryscript::port
+  )
+endif()
+
 if(DUSK_BACKTRACE)
   target_link_options(${DUSK_LIBRARY_TARGET_NAME} PUBLIC -rdynamic)
   target_compile_definitions(${DUSK_BINARY_TARGET_NAME} PUBLIC
@@ -58,17 +67,20 @@ add_subdirectory(assert)
 add_subdirectory(asset)
 add_subdirectory(console)
 add_subdirectory(display)
+add_subdirectory(entity)
 add_subdirectory(log)
 add_subdirectory(engine)
 add_subdirectory(error)
+add_subdirectory(game)
 add_subdirectory(input)
 add_subdirectory(locale)
-add_subdirectory(rpg)
 add_subdirectory(scene)
 add_subdirectory(system)
 add_subdirectory(time)
 add_subdirectory(ui)
 add_subdirectory(network)
+add_subdirectory(physics)
 add_subdirectory(save)
+add_subdirectory(script)
 add_subdirectory(util)
 add_subdirectory(thread)

src/dusk/animation/CMakeLists.txt

@@ -6,5 +6,7 @@
 target_sources(${DUSK_LIBRARY_TARGET_NAME}
   PUBLIC
     easing.c
+    keyframe.c
+    keyframeset.c
     animation.c
 )

src/dusk/animation/animation.c

@@ -5,48 +5,70 @@
 
 #include "animation.h"
 #include "assert/assert.h"
-#include "util/memory.h"
 #include "util/math.h"
+#include "time/time.h"
 
 void animationInit(
   animation_t *anim,
-  keyframe_t *keyframes,
+  keyframe_t **tracks,
-  uint16_t keyframeCount
+  uint16_t *trackCounts,
+  uint16_t trackCount
 ) {
   assertNotNull(anim, "Animation pointer cannot be null.");
-  assertNotNull(keyframes, "Keyframes pointer cannot be null.");
-  assertTrue(keyframeCount > 0, "Keyframe count must be more than 0.");
 
-  anim->keyframes = keyframes;
+  keyframeSetInit(
-  anim->keyframeCount = keyframeCount;
+    &anim->keyframes, tracks, trackCounts, NULL, NULL, trackCount, NULL
+  );
+  anim->time = 0.0f;
+  anim->speed = 1.0f;
+  anim->loop = false;
+  anim->playing = false;
+  anim->eventTime = 0.0f;
+  anim->eventCallback = NULL;
+  anim->eventUser = NULL;
 }
 
-float_t animationGetValue(animation_t *anim, const float_t time) {
+void animationUpdate(animation_t *anim) {
   assertNotNull(anim, "Animation pointer cannot be null.");
-  assertNotNull(anim->keyframes, "Keyframes pointer cannot be null.");
+  if(!anim->playing) return;
-  assertTrue(anim->keyframeCount > 0, "Keyframe count invalid.");
-  assertTrue(time >= 0, "Time must be non-negative.");
-  
-  keyframe_t *start;
-  keyframe_t *end;
-  keyframe_t *last = anim->keyframes + anim->keyframeCount - 1;
-  keyframe_t *current = anim->keyframes;
-  start = current;
 
-  do {
+  float_t duration = keyframeSetGetDuration(&anim->keyframes);
-    if(current->time > time) {
+  float_t prevTime = anim->time;
-      end = current;
+  anim->time += TIME.delta * anim->speed;
-      break;
-    }
-    start = current;
-    current++;
 
-    if(current > last) {
+  // Loops that overshoot duration wrap back into [0, duration) -- an event
-      end = start;
+  // near the end must still be checked across that wrap, as two segments:
-      break;
+  // (prevTime, duration] then [0, newTime].
-    }
+  bool_t wrapped = anim->loop && duration > 0.0f && anim->time >= duration;
-  } while(true);
 
-  float_t t = (time - start->time) / (end->time - start->time);
+  if(anim->loop) {
-  return mathLerp(start->value, end->value, easingApply(start->easing, t));
+    if(duration > 0.0f) anim->time = mathModFloat(anim->time, duration);
-}
+  } else if(anim->time >= duration) {
+    anim->time = duration;
+    anim->playing = false;
+  }
+
+  if(!anim->eventCallback) return;
+
+  bool_t crossed = wrapped
+    ? (prevTime < anim->eventTime || anim->time >= anim->eventTime)
+    : (prevTime < anim->eventTime && anim->time >= anim->eventTime);
+  if(crossed) anim->eventCallback(anim, anim->eventUser);
+}
+
+void animationSetEvent(
+  animation_t *anim,
+  const float_t time,
+  const animationeventcallback_t callback,
+  void *user
+) {
+  assertNotNull(anim, "Animation pointer cannot be null.");
+  anim->eventTime = time;
+  anim->eventCallback = callback;
+  anim->eventUser = user;
+}
+
+float_t animationGetValue(animation_t *anim, const uint16_t trackIndex) {
+  assertNotNull(anim, "Animation pointer cannot be null.");
+  return keyframeSetGetValue(&anim->keyframes, trackIndex, anim->time);
+}

src/dusk/animation/animation.h

@@ -4,31 +4,99 @@
 // https://opensource.org/licenses/MIT
 
 #pragma once
-#include "keyframe.h"
+#include "keyframeset.h"
 
-typedef struct {
+typedef struct animation_t animation_t;
-  keyframe_t *keyframes;
+
-  uint16_t keyframeCount;
+/**
+ * Callback fired once when animationUpdate() advances time past
+ * eventTime (see animationSetEvent()).
+ *
+ * @param anim The animation whose event fired.
+ * @param user The user pointer passed to animationSetEvent().
+ */
+typedef void (*animationeventcallback_t)(animation_t *anim, void *user);
+
+typedef struct animation_t {
+  /** The animation's tracks/channels and their raw keyframe data. */
+  keyframeset_t keyframes;
+
+  /** Current playback position, in seconds. */
+  float_t time;
+
+  /** Playback rate multiplier; 1.0 = normal speed. */
+  float_t speed;
+
+  /** True if animationUpdate() should wrap time back to 0 on reaching the
+   * final keyframe, rather than holding there and clearing playing. */
+  bool_t loop;
+
+  /** True while animationUpdate() should advance time each call. */
+  bool_t playing;
+
+  /** Time (seconds) at which eventCallback fires; see animationSetEvent(). */
+  float_t eventTime;
+  /** Callback fired once when time advances past eventTime, or NULL. */
+  animationeventcallback_t eventCallback;
+  /** User pointer passed to eventCallback unchanged. */
+  void *eventUser;
 } animation_t;
 
 /**
- * Initializes an animation.
+ * Initializes an animation: time 0, speed 1.0, not looping, not playing.
- * 
+ * See keyframeSetInit() -- tracks/trackCounts and the keyframe_t arrays
+ * they point to are not copied, and must outlive this animation.
+ *
  * @param anim The animation to initialize.
- * @param keyframes The keyframes to use for the animation.
+ * @param tracks Array of trackCount keyframe_t arrays.
- * @param keyframeCount The number of keyframes in the animation.
+ * @param trackCounts Array of trackCount keyframe counts, matching tracks.
+ * @param trackCount The number of tracks/channels in this animation.
  */
 void animationInit(
   animation_t *anim,
-  keyframe_t *keyframes,
+  keyframe_t **tracks,
-  uint16_t keyframeCount
+  uint16_t *trackCounts,
+  uint16_t trackCount
 );
 
 /**
- * Gets the value of the animation at a given time.
+ * Advances an animation's time by TIME.delta * speed. No-op if not
- * 
+ * playing. Duration is the latest of every track's final keyframe time
- * @param anim The animation to get the value from.
+ * (see keyframeSetGetDuration()). If loop is set, time wraps back into
- * @param time The time at which to get the value, in seconds.
+ * [0, duration) on reaching it; otherwise time is clamped there and
- * @return The value of the animation at the given time.
+ * playing is cleared.
+ *
+ * If eventCallback is set, it fires once when this call advances time
+ * from at or before eventTime to after it (checked across the loop wrap
+ * point too, so an event near the end of a looping animation still fires
+ * every loop).
+ *
+ * @param anim The animation to update.
  */
-float_t animationGetValue(animation_t *anim, const float_t time);
+void animationUpdate(animation_t *anim);
+
+/**
+ * Sets (or clears, with callback NULL) the single time-triggered event
+ * fired by animationUpdate().
+ *
+ * @param anim The animation to set the event on.
+ * @param time The time, in seconds, at which callback fires.
+ * @param callback The callback to invoke, or NULL to clear any event.
+ * @param user Arbitrary pointer forwarded to callback unchanged.
+ */
+void animationSetEvent(
+  animation_t *anim,
+  const float_t time,
+  const animationeventcallback_t callback,
+  void *user
+);
+
+/**
+ * Gets the value of one of the animation's tracks at its current
+ * playback time.
+ *
+ * @param anim The animation to get the value from.
+ * @param trackIndex The track to evaluate, in [0, trackCount).
+ * @return The interpolated value of that track at the current time.
+ */
+float_t animationGetValue(animation_t *anim, const uint16_t trackIndex);

src/dusk/animation/keyframe.c

@@ -0,0 +1,43 @@
+// Copyright (c) 2026 Dominic Masters
+//
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "keyframe.h"
+#include "assert/assert.h"
+#include "util/math.h"
+
+float_t keyframeGetValue(
+  keyframe_t *keyframes,
+  const uint16_t keyframeCount,
+  const float_t time
+) {
+  assertNotNull(keyframes, "Keyframes pointer cannot be null.");
+  assertTrue(keyframeCount > 0, "Keyframe count must be more than 0.");
+  assertTrue(time >= 0, "Time must be non-negative.");
+
+  keyframe_t *first = keyframes;
+  keyframe_t *last = keyframes + keyframeCount - 1;
+
+  // Clamp to the boundary keyframes' values directly rather than
+  // interpolating -- start == end at either boundary would otherwise
+  // divide by zero.
+  if(time <= first->time) return first->value;
+  if(time >= last->time) return last->value;
+
+  keyframe_t *start = first;
+  keyframe_t *end;
+  keyframe_t *current = first;
+
+  do {
+    if(current->time > time) {
+      end = current;
+      break;
+    }
+    start = current;
+    current++;
+  } while(true);
+
+  float_t t = (time - start->time) / (end->time - start->time);
+  return mathLerp(start->value, end->value, easingApply(start->easing, t));
+}

src/dusk/animation/keyframe.h

@@ -10,4 +10,18 @@ typedef struct {
   float_t time;
   float_t value;
   easingtype_t easing;
-} keyframe_t;
+} keyframe_t;
+
+/**
+ * Gets the eased, interpolated value of a keyframe array at a given time.
+ *
+ * @param keyframes The keyframes to evaluate, ascending by time.
+ * @param keyframeCount The number of keyframes.
+ * @param time The time at which to get the value, in seconds.
+ * @return The interpolated value at the given time.
+ */
+float_t keyframeGetValue(
+  keyframe_t *keyframes,
+  const uint16_t keyframeCount,
+  const float_t time
+);

src/dusk/animation/keyframeset.c

@@ -0,0 +1,76 @@
+// Copyright (c) 2026 Dominic Masters
+//
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "keyframeset.h"
+#include "assert/assert.h"
+
+void keyframeSetInit(
+  keyframeset_t *set,
+  keyframe_t **tracks,
+  uint16_t *trackCounts,
+  keyframesetcallback_t *callbacks,
+  void **users,
+  uint16_t trackCount,
+  void *user
+) {
+  assertNotNull(set, "Keyframe set pointer cannot be null.");
+  assertNotNull(tracks, "Tracks pointer cannot be null.");
+  assertNotNull(trackCounts, "Track counts pointer cannot be null.");
+  assertTrue(trackCount > 0, "Track count must be more than 0.");
+
+  set->tracks = tracks;
+  set->trackCounts = trackCounts;
+  set->trackCount = trackCount;
+  set->callbacks = callbacks;
+  set->users = users;
+  set->user = user;
+}
+
+float_t keyframeSetGetValue(
+  keyframeset_t *set,
+  const uint16_t trackIndex,
+  const float_t time
+) {
+  assertNotNull(set, "Keyframe set pointer cannot be null.");
+  assertTrue(trackIndex < set->trackCount, "Track index out of bounds.");
+
+  return keyframeGetValue(
+    set->tracks[trackIndex], set->trackCounts[trackIndex], time
+  );
+}
+
+void keyframeSetGetValues(
+  keyframeset_t *set,
+  const float_t time,
+  float_t *outValues
+) {
+  assertNotNull(set, "Keyframe set pointer cannot be null.");
+  assertNotNull(outValues, "Output values pointer cannot be null.");
+
+  for(uint16_t i = 0; i < set->trackCount; i++) {
+    outValues[i] = keyframeGetValue(set->tracks[i], set->trackCounts[i], time);
+  }
+}
+
+float_t keyframeSetGetDuration(keyframeset_t *set) {
+  assertNotNull(set, "Keyframe set pointer cannot be null.");
+
+  float_t duration = 0.0f;
+  for(uint16_t i = 0; i < set->trackCount; i++) {
+    float_t trackDuration = set->tracks[i][set->trackCounts[i] - 1].time;
+    if(trackDuration > duration) duration = trackDuration;
+  }
+  return duration;
+}
+
+void keyframeSetFireCallback(keyframeset_t *set, const uint16_t trackIndex) {
+  assertNotNull(set, "Keyframe set pointer cannot be null.");
+  assertTrue(trackIndex < set->trackCount, "Track index out of bounds.");
+
+  if(!set->callbacks || !set->callbacks[trackIndex]) return;
+  set->callbacks[trackIndex](
+    set, trackIndex, set->users ? set->users[trackIndex] : NULL
+  );
+}

src/dusk/animation/keyframeset.h

@@ -0,0 +1,116 @@
+// Copyright (c) 2026 Dominic Masters
+//
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "keyframe.h"
+
+typedef struct keyframeset_t keyframeset_t;
+
+/**
+ * Callback associated with one track of a keyframe set (see
+ * keyframeSetFireCallback()).
+ *
+ * @param set The keyframe set the track belongs to.
+ * @param trackIndex The track this callback is registered for.
+ * @param user The per-track user pointer passed to keyframeSetInit().
+ */
+typedef void (*keyframesetcallback_t)(
+  keyframeset_t *set,
+  const uint16_t trackIndex,
+  void *user
+);
+
+/**
+ * A group of N parallel keyframe tracks (e.g. one per animated channel --
+ * position.x/y/z, bone rotations, etc.) sharing a single timeline. Each
+ * track is independent: its own keyframe array and count, evaluated at
+ * whatever time is asked for.
+ */
+typedef struct keyframeset_t {
+  /** Caller-owned array of trackCount keyframe_t arrays. */
+  keyframe_t **tracks;
+  /** Caller-owned array of trackCount counts, one per entry in tracks. */
+  uint16_t *trackCounts;
+  uint16_t trackCount;
+
+  /** Caller-owned array of trackCount callbacks, one per track. Entries
+   * (or the whole array) may be NULL for tracks with no callback. */
+  keyframesetcallback_t *callbacks;
+  /** Caller-owned array of trackCount user pointers, one per track,
+   * passed to that track's callbacks[] entry. May be NULL. */
+  void **users;
+  /** Extra user data for the set as a whole, not tied to any one track. */
+  void *user;
+} keyframeset_t;
+
+/**
+ * Initializes a keyframe set. None of the passed-in arrays (or the
+ * keyframe_t arrays tracks points to) are copied -- they must outlive
+ * this keyframeset_t.
+ *
+ * @param set The keyframe set to initialize.
+ * @param tracks Array of trackCount keyframe_t arrays.
+ * @param trackCounts Array of trackCount keyframe counts, matching tracks.
+ * @param callbacks Array of trackCount callbacks, one per track, or NULL
+ * if no track has one.
+ * @param users Array of trackCount user pointers, matching callbacks, or
+ * NULL.
+ * @param trackCount The number of tracks.
+ * @param user Extra user data for the set as a whole; may be NULL.
+ */
+void keyframeSetInit(
+  keyframeset_t *set,
+  keyframe_t **tracks,
+  uint16_t *trackCounts,
+  keyframesetcallback_t *callbacks,
+  void **users,
+  uint16_t trackCount,
+  void *user
+);
+
+/**
+ * Gets the value of a single track at a given time.
+ *
+ * @param set The keyframe set to evaluate.
+ * @param trackIndex The track to evaluate, in [0, set->trackCount).
+ * @param time The time at which to get the value, in seconds.
+ * @return The interpolated value of that track at the given time.
+ */
+float_t keyframeSetGetValue(
+  keyframeset_t *set,
+  const uint16_t trackIndex,
+  const float_t time
+);
+
+/**
+ * Gets the value of every track at a given time.
+ *
+ * @param set The keyframe set to evaluate.
+ * @param time The time at which to get the values, in seconds.
+ * @param outValues Destination array of at least set->trackCount floats.
+ */
+void keyframeSetGetValues(
+  keyframeset_t *set,
+  const float_t time,
+  float_t *outValues
+);
+
+/**
+ * Gets the set's duration: the latest final-keyframe time across every
+ * track, i.e. how long it takes for every track to finish.
+ *
+ * @param set The keyframe set to measure.
+ * @return The set's duration, in seconds.
+ */
+float_t keyframeSetGetDuration(keyframeset_t *set);
+
+/**
+ * Invokes a track's callback, if it (and its callbacks array) is set.
+ * No-op otherwise.
+ *
+ * @param set The keyframe set the track belongs to.
+ * @param trackIndex The track whose callback to invoke.
+ */
+void keyframeSetFireCallback(keyframeset_t *set, const uint16_t trackIndex);

src/dusk/assert/assert.h

@@ -8,6 +8,13 @@
 #pragma once
 #include "dusk.h"
 
+// Release-style CMake configs (Release, RelWithDebInfo, MinSizeRel) define
+// NDEBUG automatically; fake assertions there rather than requiring every
+// platform's CMakeLists to set DUSK_ASSERTIONS_FAKED itself.
+#if defined(NDEBUG) && !defined(DUSK_ASSERTIONS_FAKED)
+  #define DUSK_ASSERTIONS_FAKED
+#endif
+
 #ifdef DUSK_TEST_ASSERT
   #include <cmocka.h>
   

src/dusk/asset/loader/CMakeLists.txt

@@ -15,5 +15,5 @@ target_sources(${DUSK_LIBRARY_TARGET_NAME}
 add_subdirectory(display)
 add_subdirectory(locale)
 add_subdirectory(json)
-add_subdirectory(chunk)
+add_subdirectory(dmf)
-add_subdirectory(dmf)
+add_subdirectory(animation)

src/dusk/asset/loader/animation/CMakeLists.txt

@@ -5,5 +5,5 @@
 
 target_sources(${DUSK_LIBRARY_TARGET_NAME}
   PUBLIC
-    cutscenestartbattle.c
+    assetanimationloader.c
 )

src/dusk/asset/loader/animation/assetanimationloader.c

@@ -0,0 +1,234 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "assetanimationloader.h"
+#include "util/memory.h"
+#include "util/string.h"
+#include "assert/assert.h"
+#include "asset/loader/assetloading.h"
+#include "asset/loader/assetentry.h"
+
+errorret_t assetAnimationLoaderAsync(assetloading_t *loading) {
+  assertNotNull(loading, "Loading cannot be NULL");
+  assertNotMainThread("Async loader should not be on main thread.");
+
+  if(
+    loading->loading.animation.state != ASSET_ANIMATION_LOADING_STATE_READ_FILE
+  ) {
+    errorOk();
+  }
+
+  assertNull(loading->loading.animation.buffer, "Buffer already defined?");
+
+  assetfile_t *file = &loading->loading.animation.file;
+  assetLoaderErrorChain(
+    loading, assetFileInit(file, loading->entry->name, NULL, NULL)
+  );
+
+  if(file->size > ASSET_ANIMATION_FILE_SIZE_MAX) {
+    assetLoaderErrorThrow(
+      loading, "Animation JSON exceeds maximum allowed size"
+    );
+  }
+
+  uint8_t *buffer;
+  size_t size;
+  assetLoaderErrorChain(loading, assetFileReadEntire(file, &buffer, &size));
+  assetLoaderErrorChain(loading, assetFileDispose(file));
+
+  loading->loading.animation.buffer = buffer;
+  loading->loading.animation.size = size;
+  loading->loading.animation.state = ASSET_ANIMATION_LOADING_STATE_PARSE;
+  loading->entry->state = ASSET_ENTRY_STATE_PENDING_SYNC;
+  errorOk();
+}
+
+errorret_t assetAnimationLoaderSync(assetloading_t *loading) {
+  assertNotNull(loading, "Loading cannot be NULL");
+  assertTrue(loading->type == ASSET_LOADER_TYPE_ANIMATION, "Invalid type.");
+  assertIsMainThread("Must be called from the main thread.");
+
+  switch(loading->loading.animation.state) {
+    case ASSET_ANIMATION_LOADING_STATE_INITIAL:
+      loading->loading.animation.state =
+        ASSET_ANIMATION_LOADING_STATE_READ_FILE;
+      loading->entry->state = ASSET_ENTRY_STATE_PENDING_ASYNC;
+      errorOk();
+      break;
+
+    case ASSET_ANIMATION_LOADING_STATE_PARSE:
+      break;
+
+    default:
+      errorOk();
+  }
+
+  uint8_t *buffer = loading->loading.animation.buffer;
+  assertNotNull(buffer, "Animation buffer should have been loaded by now.");
+
+  yyjson_doc *doc = yyjson_read(
+    (char *)buffer,
+    loading->loading.animation.size,
+    YYJSON_READ_ALLOW_COMMENTS | YYJSON_READ_ALLOW_TRAILING_COMMAS
+  );
+  memoryFree(buffer);
+  loading->loading.animation.buffer = NULL;
+
+  if(!doc) assetLoaderErrorThrow(loading, "Failed to parse animation JSON");
+
+  yyjson_val *root = yyjson_doc_get_root(doc);
+  yyjson_val *channelsVal = yyjson_obj_get(root, "channels");
+  if(!channelsVal || !yyjson_is_arr(channelsVal)) {
+    yyjson_doc_free(doc);
+    assetLoaderErrorThrow(loading, "Animation JSON missing 'channels' array");
+  }
+
+  uint16_t channelCount = (uint16_t)yyjson_arr_size(channelsVal);
+  if(channelCount == 0) {
+    yyjson_doc_free(doc);
+    assetLoaderErrorThrow(loading, "Animation must have at least one channel");
+  }
+
+  keyframe_t **tracks = memoryAllocate(channelCount * sizeof(keyframe_t *));
+  uint16_t *trackCounts = memoryAllocate(channelCount * sizeof(uint16_t));
+
+  size_t idx, max;
+  yyjson_val *channelJson;
+  uint16_t parsed = 0;
+  yyjson_arr_foreach(channelsVal, idx, max, channelJson) {
+    keyframe_t *keyframes;
+    uint16_t count;
+    errorret_t ret =
+      assetAnimationParseChannel(channelJson, &keyframes, &count);
+    if(errorIsNotOk(ret)) {
+      assetAnimationFreeChannels(tracks, parsed);
+      memoryFree(trackCounts);
+      yyjson_doc_free(doc);
+      loading->entry->state = ASSET_ENTRY_STATE_ERROR;
+      errorChain(ret);
+    }
+
+    tracks[idx] = keyframes;
+    trackCounts[idx] = count;
+    parsed++;
+  }
+
+  animationInit(
+    &loading->entry->data.animation, tracks, trackCounts, channelCount
+  );
+
+  yyjson_val *loopVal = yyjson_obj_get(root, "loop");
+  if(loopVal) loading->entry->data.animation.loop = yyjson_get_bool(loopVal);
+
+  yyjson_val *speedVal = yyjson_obj_get(root, "speed");
+  if(speedVal) {
+    loading->entry->data.animation.speed = (float_t)yyjson_get_num(speedVal);
+  }
+
+  yyjson_doc_free(doc);
+
+  loading->entry->state = ASSET_ENTRY_STATE_LOADED;
+  errorOk();
+}
+
+errorret_t assetAnimationDispose(assetentry_t *entry) {
+  assertNotNull(entry, "Asset entry cannot be NULL");
+  assertTrue(entry->type == ASSET_LOADER_TYPE_ANIMATION, "Invalid type.");
+  assertIsMainThread("Must be called from the main thread.");
+
+  // A load that failed before animationInit() ran (e.g. a parse error)
+  // never populated these -- nothing to free in that case.
+  keyframeset_t *set = &entry->data.animation.keyframes;
+  if(set->tracks) {
+    assetAnimationFreeChannels(set->tracks, set->trackCount);
+    memoryFree(set->trackCounts);
+    set->tracks = NULL;
+    set->trackCounts = NULL;
+    set->trackCount = 0;
+  }
+
+  errorOk();
+}
+
+errorret_t assetAnimationParseEasing(
+  const char_t *name,
+  easingtype_t *outEasing
+) {
+  if(stringEquals(name, "LINEAR")) *outEasing = EASING_LINEAR;
+  else if(stringEquals(name, "IN_SINE")) *outEasing = EASING_IN_SINE;
+  else if(stringEquals(name, "OUT_SINE")) *outEasing = EASING_OUT_SINE;
+  else if(stringEquals(name, "IN_OUT_SINE")) *outEasing = EASING_IN_OUT_SINE;
+  else if(stringEquals(name, "IN_QUAD")) *outEasing = EASING_IN_QUAD;
+  else if(stringEquals(name, "OUT_QUAD")) *outEasing = EASING_OUT_QUAD;
+  else if(stringEquals(name, "IN_OUT_QUAD")) *outEasing = EASING_IN_OUT_QUAD;
+  else if(stringEquals(name, "IN_CUBIC")) *outEasing = EASING_IN_CUBIC;
+  else if(stringEquals(name, "OUT_CUBIC")) *outEasing = EASING_OUT_CUBIC;
+  else if(stringEquals(name, "IN_OUT_CUBIC")) *outEasing = EASING_IN_OUT_CUBIC;
+  else if(stringEquals(name, "IN_QUART")) *outEasing = EASING_IN_QUART;
+  else if(stringEquals(name, "OUT_QUART")) *outEasing = EASING_OUT_QUART;
+  else if(stringEquals(name, "IN_OUT_QUART")) *outEasing = EASING_IN_OUT_QUART;
+  else if(stringEquals(name, "IN_BACK")) *outEasing = EASING_IN_BACK;
+  else if(stringEquals(name, "OUT_BACK")) *outEasing = EASING_OUT_BACK;
+  else if(stringEquals(name, "IN_OUT_BACK")) *outEasing = EASING_IN_OUT_BACK;
+  else errorThrow("Unknown easing type '%s'", name);
+
+  errorOk();
+}
+
+errorret_t assetAnimationParseChannel(
+  yyjson_val *channelJson,
+  keyframe_t **outKeyframes,
+  uint16_t *outCount
+) {
+  if(!yyjson_is_arr(channelJson)) {
+    errorThrow("Animation channel must be an array");
+  }
+
+  size_t count = yyjson_arr_size(channelJson);
+  if(count == 0) {
+    errorThrow("Animation channel must have at least one keyframe");
+  }
+
+  keyframe_t *keyframes = memoryAllocate(count * sizeof(keyframe_t));
+
+  size_t idx, max;
+  yyjson_val *keyframeJson;
+  yyjson_arr_foreach(channelJson, idx, max, keyframeJson) {
+    yyjson_val *timeVal = yyjson_obj_get(keyframeJson, "time");
+    yyjson_val *valueVal = yyjson_obj_get(keyframeJson, "value");
+    if(!timeVal || !valueVal) {
+      memoryFree(keyframes);
+      errorThrow("Animation keyframe missing 'time' or 'value'");
+    }
+
+    keyframes[idx].time = (float_t)yyjson_get_num(timeVal);
+    keyframes[idx].value = (float_t)yyjson_get_num(valueVal);
+
+    yyjson_val *easingVal = yyjson_obj_get(keyframeJson, "easing");
+    if(!easingVal) {
+      keyframes[idx].easing = EASING_LINEAR;
+      continue;
+    }
+
+    errorret_t ret = assetAnimationParseEasing(
+      yyjson_get_str(easingVal), &keyframes[idx].easing
+    );
+    if(errorIsNotOk(ret)) {
+      memoryFree(keyframes);
+      errorChain(ret);
+    }
+  }
+
+  *outKeyframes = keyframes;
+  *outCount = (uint16_t)count;
+  errorOk();
+}
+
+void assetAnimationFreeChannels(keyframe_t **tracks, const uint16_t count) {
+  for(uint16_t i = 0; i < count; i++) memoryFree(tracks[i]);
+  memoryFree(tracks);
+}

src/dusk/asset/loader/animation/assetanimationloader.h

@@ -0,0 +1,101 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "error/error.h"
+#include "asset/assetfile.h"
+#include "animation/animation.h"
+#include "yyjson.h"
+
+#define ASSET_ANIMATION_FILE_SIZE_MAX 1024*256
+
+typedef struct assetloading_s assetloading_t;
+typedef struct assetentry_s assetentry_t;
+
+/**
+ * JSON animation file format:
+ * {
+ *   "loop": false,
+ *   "speed": 1.0,
+ *   "channels": [
+ *     [
+ *       { "time": 0.0, "value": 0.0, "easing": "LINEAR" },
+ *       { "time": 1.0, "value": 10.0 }
+ *     ]
+ *   ]
+ * }
+ *
+ * "loop" and "speed" are optional, defaulting to false and 1.0 (see
+ * animationInit()). "channels" is required and must have at least one
+ * entry; each entry is itself a non-empty array of keyframes, ascending
+ * by "time", sharing one timeline with every other channel (see
+ * keyframeset_t). Each keyframe requires "time" and "value"; "easing" is
+ * optional and defaults to "LINEAR" (see easingtype_t for the full set of
+ * names, e.g. "IN_QUAD", "OUT_BACK", "IN_OUT_CUBIC").
+ */
+
+typedef enum {
+  ASSET_ANIMATION_LOADING_STATE_INITIAL,
+  ASSET_ANIMATION_LOADING_STATE_READ_FILE,
+  ASSET_ANIMATION_LOADING_STATE_PARSE,
+  ASSET_ANIMATION_LOADING_STATE_DONE
+} assetanimationloadingstate_t;
+
+typedef struct {
+  assetfile_t file;
+  assetanimationloadingstate_t state;
+  uint8_t *buffer;
+  size_t size;
+} assetanimationloaderloading_t;
+
+typedef animation_t assetanimationoutput_t;
+
+errorret_t assetAnimationLoaderAsync(assetloading_t *loading);
+errorret_t assetAnimationLoaderSync(assetloading_t *loading);
+errorret_t assetAnimationDispose(assetentry_t *entry);
+
+/**
+ * Internal. Maps a JSON easing name (e.g. "IN_OUT_QUAD") to its
+ * easingtype_t.
+ *
+ * @param name The easing name to parse.
+ * @param outEasing Destination for the parsed easing type.
+ * @return Error state; fails if name doesn't match any easingtype_t.
+ */
+errorret_t assetAnimationParseEasing(
+  const char_t *name,
+  easingtype_t *outEasing
+);
+
+/**
+ * Internal. Parses one "channels" array entry into a heap-allocated
+ * keyframe_t array (memoryAllocate) -- freed later by
+ * assetAnimationFreeChannels() (on a parse failure) or
+ * assetAnimationDispose() (once loaded).
+ *
+ * @param channelJson The channel's JSON array of keyframe objects.
+ * @param outKeyframes Destination for the newly allocated keyframe array.
+ * @param outCount Destination for the number of keyframes parsed.
+ * @return Error state.
+ */
+errorret_t assetAnimationParseChannel(
+  yyjson_val *channelJson,
+  keyframe_t **outKeyframes,
+  uint16_t *outCount
+);
+
+/**
+ * Internal. Frees the first count entries of tracks (each a
+ * memoryAllocate'd keyframe_t array from assetAnimationParseChannel()),
+ * then frees tracks itself. Used both to unwind a partially-parsed
+ * channel list on failure and to free a fully-loaded animation's
+ * channels in assetAnimationDispose().
+ *
+ * @param tracks The channel array to free.
+ * @param count The number of entries in tracks to free.
+ */
+void assetAnimationFreeChannels(keyframe_t **tracks, const uint16_t count);

src/dusk/asset/loader/assetloader.c

@@ -46,9 +46,9 @@ assetloadercallbacks_t ASSET_LOADER_CALLBACKS[ASSET_LOADER_TYPE_COUNT] = {
     .dispose = assetJsonDispose
   },
 
-  [ASSET_LOADER_TYPE_CHUNK] = {
+  [ASSET_LOADER_TYPE_ANIMATION] = {
-    .loadSync = assetChunkLoaderSync,
+    .loadSync = assetAnimationLoaderSync,
-    .loadAsync = assetChunkLoaderAsync,
+    .loadAsync = assetAnimationLoaderAsync,
-    .dispose = assetChunkDispose
+    .dispose = assetAnimationDispose
   },
 };

src/dusk/asset/loader/assetloader.h

@@ -12,7 +12,7 @@
 #include "asset/loader/display/assettilesetloader.h"
 #include "asset/loader/locale/assetlocaleloader.h"
 #include "asset/loader/json/assetjsonloader.h"
-#include "asset/loader/chunk/assetchunkloader.h"
+#include "asset/loader/animation/assetanimationloader.h"
 
 typedef enum {
   ASSET_LOADER_TYPE_NULL,
@@ -23,7 +23,7 @@ typedef enum {
   ASSET_LOADER_TYPE_TILESET,
   ASSET_LOADER_TYPE_LOCALE,
   ASSET_LOADER_TYPE_JSON,
-  ASSET_LOADER_TYPE_CHUNK,
+  ASSET_LOADER_TYPE_ANIMATION,
 
   ASSET_LOADER_TYPE_COUNT
 } assetloadertype_t;
@@ -35,7 +35,7 @@ typedef union {
   assettilesetloaderloading_t tileset;
   assetlocaleloaderloading_t locale;
   assetjsonloaderloading_t json;
-  assetchunkloaderloading_t chunk;
+  assetanimationloaderloading_t animation;
 } assetloaderloading_t;
 
 typedef union {
@@ -45,7 +45,7 @@ typedef union {
   assettilesetoutput_t tileset;
   assetlocaleoutput_t locale;
   assetjsonoutput_t json;
-  assetchunkoutput_t chunk;
+  assetanimationoutput_t animation;
 } assetloaderoutput_t;
 
 typedef union {
@@ -53,7 +53,6 @@ typedef union {
   assettilesetloaderinput_t tileset;
   assetlocaleloaderinput_t locale;
   assetjsonloaderinput_t json;
-  assetchunkloaderinput_t chunk;
 } assetloaderinput_t;
 
 typedef struct assetloading_s assetloading_t;

src/dusk/asset/loader/chunk/assetchunkloader.c

@@ -1,220 +0,0 @@
-/**
- * Copyright (c) 2026 Dominic Masters
- *
- * This software is released under the MIT License.
- * https://opensource.org/licenses/MIT
- */
-
-#include "assetchunkloader.h"
-#include "assert/assert.h"
-#include "util/memory.h"
-#include "util/string.h"
-#include "asset/loader/assetloading.h"
-#include "asset/loader/assetentry.h"
-#include "asset/loader/assetloader.h"
-#include "asset/loader/json/assetjsonloader.h"
-#include "asset/asset.h"
-#include "yyjson.h"
-
-errorret_t assetChunkLoaderAsync(assetloading_t *loading) {
-  assertNotNull(loading, "Loading cannot be NULL");
-  assertNotMainThread("Should be called from an async thread.");
-  errorOk();
-}
-
-errorret_t assetChunkLoaderSync(assetloading_t *loading) {
-  assertNotNull(loading, "Loading cannot be NULL");
-  assertTrue(loading->type == ASSET_LOADER_TYPE_CHUNK, "Invalid type.");
-  assertIsMainThread("Must be called from the main thread.");
-
-  assetchunkoutput_t *out = &loading->entry->data.chunk;
-
-  switch(loading->loading.chunk.state) {
-    case ASSET_CHUNK_LOADING_STATE_INITIAL:
-      loading->loading.chunk.state = ASSET_CHUNK_LOADING_STATE_LOAD_JSON;
-      loading->entry->state = ASSET_ENTRY_STATE_PENDING_SYNC;
-      errorOk();
-
-    case ASSET_CHUNK_LOADING_STATE_LOAD_JSON: {
-      // Lock the chunk's JSON as a sub-asset. The entry key is prefixed
-      // with "json:" to avoid a type-collision with the chunk entry
-      // itself (both share the same filename). The JSON loader reads
-      // the real file path supplied in the input.
-      char_t jsonKey[ASSET_FILE_NAME_MAX];
-      stringFormat(
-        jsonKey, sizeof(jsonKey), "json:%s", loading->entry->name
-      );
-      assetloaderinput_t jsonInput;
-      memoryZero(&jsonInput, sizeof(jsonInput));
-      stringCopy(
-        jsonInput.json.path, loading->entry->name, ASSET_FILE_NAME_MAX
-      );
-      assetentry_t *jsonEntry = assetLock(
-        jsonKey, ASSET_LOADER_TYPE_JSON, &jsonInput
-      );
-      errorret_t ret = assetRequireLoaded(jsonEntry);
-      if(errorIsNotOk(ret)) {
-        assetUnlockEntry(jsonEntry);
-        loading->entry->state = ASSET_ENTRY_STATE_ERROR;
-        errorChain(ret);
-      }
-
-      yyjson_val *root = yyjson_doc_get_root(jsonEntry->data.json);
-
-      yyjson_val *tilesVal = yyjson_obj_get(root, "tiles");
-      if(
-        !tilesVal || !yyjson_is_arr(tilesVal) ||
-        yyjson_arr_size(tilesVal) != CHUNK_TILE_COUNT
-      ) {
-        assetUnlockEntry(jsonEntry);
-        loading->entry->state = ASSET_ENTRY_STATE_ERROR;
-        errorThrow(
-          "Chunk JSON 'tiles' must have exactly %d entries",
-          CHUNK_TILE_COUNT
-        );
-      }
-
-      out->tiles = memoryAllocate(CHUNK_TILE_COUNT * sizeof(tile_t));
-      size_t tileIdx, tileMax;
-      yyjson_val *tileVal;
-      yyjson_arr_foreach(tilesVal, tileIdx, tileMax, tileVal) {
-        yyjson_val *shapeVal = yyjson_arr_get(tileVal, 0);
-        yyjson_val *zVal = yyjson_arr_get(tileVal, 1);
-        if(
-          !yyjson_is_arr(tileVal) || yyjson_arr_size(tileVal) != 2 ||
-          !yyjson_is_int(shapeVal) || !yyjson_is_int(zVal)
-        ) {
-          memoryFree(out->tiles);
-          out->tiles = NULL;
-          assetUnlockEntry(jsonEntry);
-          loading->entry->state = ASSET_ENTRY_STATE_ERROR;
-          errorThrow("Chunk JSON tile entries must be [shape, z] arrays");
-        }
-        out->tiles[tileIdx] = (tile_t){
-          .shape = (tileshape_t)yyjson_get_int(shapeVal),
-          .z = (uint8_t)yyjson_get_int(zVal)
-        };
-      }
-
-      yyjson_val *meshesVal = yyjson_obj_get(root, "meshes");
-      out->meshCount = 0;
-      if(meshesVal && yyjson_is_arr(meshesVal)) {
-        size_t meshCount = yyjson_arr_size(meshesVal);
-        if(meshCount > CHUNK_MESH_COUNT_MAX) {
-          memoryFree(out->tiles);
-          out->tiles = NULL;
-          assetUnlockEntry(jsonEntry);
-          loading->entry->state = ASSET_ENTRY_STATE_ERROR;
-          errorThrow(
-            "Chunk JSON 'meshes' exceeds CHUNK_MESH_COUNT_MAX (%d)",
-            CHUNK_MESH_COUNT_MAX
-          );
-        }
-
-        size_t meshIdx, meshMax;
-        yyjson_val *meshVal;
-        yyjson_arr_foreach(meshesVal, meshIdx, meshMax, meshVal) {
-          yyjson_val *modelVal = yyjson_obj_get(meshVal, "model");
-          if(!modelVal || !yyjson_is_str(modelVal)) {
-            memoryFree(out->tiles);
-            out->tiles = NULL;
-            assetUnlockEntry(jsonEntry);
-            loading->entry->state = ASSET_ENTRY_STATE_ERROR;
-            errorThrow("Chunk JSON mesh entry missing 'model' string");
-          }
-          const char_t *modelStr = yyjson_get_str(modelVal);
-          size_t modelLen = yyjson_get_len(modelVal);
-          if(modelLen >= CHUNK_MESH_NAME_MAX) {
-            memoryFree(out->tiles);
-            out->tiles = NULL;
-            assetUnlockEntry(jsonEntry);
-            loading->entry->state = ASSET_ENTRY_STATE_ERROR;
-            errorThrow(
-              "Chunk JSON model path '%s' exceeds max length", modelStr
-            );
-          }
-          memoryCopy(out->modelNames[meshIdx], modelStr, modelLen + 1);
-
-          vec3 offset = { 0.0f, 0.0f, 0.0f };
-          yyjson_val *offsetVal = yyjson_obj_get(meshVal, "offset");
-          if(
-            offsetVal && yyjson_is_arr(offsetVal) &&
-            yyjson_arr_size(offsetVal) == 3
-          ) {
-            size_t offIdx, offMax;
-            yyjson_val *offElem;
-            yyjson_arr_foreach(offsetVal, offIdx, offMax, offElem) {
-              if(yyjson_is_num(offElem)) {
-                offset[offIdx] = (float_t)yyjson_get_num(offElem);
-              }
-            }
-          }
-          glm_vec3_copy(offset, out->meshOffsets[meshIdx]);
-        }
-        out->meshCount = (uint8_t)meshCount;
-      }
-
-      assetUnlockEntry(jsonEntry);
-
-      if(out->meshCount == 0) {
-        loading->entry->state = ASSET_ENTRY_STATE_LOADED;
-        errorOk();
-      }
-
-      loading->loading.chunk.state = ASSET_CHUNK_LOADING_STATE_LOAD_MODELS;
-      loading->loading.chunk.modelIndex = 0;
-      loading->entry->state = ASSET_ENTRY_STATE_PENDING_SYNC;
-      errorOk();
-    }
-
-    case ASSET_CHUNK_LOADING_STATE_LOAD_MODELS:
-      while(loading->loading.chunk.modelIndex < out->meshCount) {
-        uint8_t m = loading->loading.chunk.modelIndex;
-        if(out->modelEntries[m] == NULL) {
-          out->modelEntries[m] = assetLock(
-            out->modelNames[m], ASSET_LOADER_TYPE_MODEL, NULL
-          );
-          assertNotNull(
-            out->modelEntries[m], "Failed to lock model."
-          );
-          loading->entry->state = ASSET_ENTRY_STATE_PENDING_SYNC;
-          errorOk();
-        }
-        if(out->modelEntries[m]->state == ASSET_ENTRY_STATE_ERROR) {
-          assetLoaderErrorThrow(
-            loading, "Model failed to load: %s", out->modelNames[m]
-          );
-        }
-        if(out->modelEntries[m]->state != ASSET_ENTRY_STATE_LOADED) {
-          loading->entry->state = ASSET_ENTRY_STATE_PENDING_SYNC;
-          errorOk();
-        }
-        loading->loading.chunk.modelIndex++;
-      }
-      loading->entry->state = ASSET_ENTRY_STATE_LOADED;
-      errorOk();
-
-    default:
-      errorOk();
-  }
-}
-
-errorret_t assetChunkDispose(assetentry_t *entry) {
-  assertNotNull(entry, "Entry cannot be NULL");
-  assertTrue(entry->type == ASSET_LOADER_TYPE_CHUNK, "Invalid type.");
-  assertIsMainThread("Must be called from the main thread.");
-
-  assetchunkoutput_t *out = &entry->data.chunk;
-
-  if(out->tiles != NULL) {
-    memoryFree(out->tiles);
-    out->tiles = NULL;
-  }
-
-  for(uint8_t m = 0; m < out->meshCount; m++) {
-    if(out->modelEntries[m] == NULL) continue;
-    assetUnlockEntry(out->modelEntries[m]);
-    out->modelEntries[m] = NULL;
-  }
-  errorOk();
-}

src/dusk/asset/loader/chunk/assetchunkloader.h

@@ -1,77 +0,0 @@
-/**
- * Copyright (c) 2026 Dominic Masters
- *
- * This software is released under the MIT License.
- * https://opensource.org/licenses/MIT
- */
-
-#pragma once
-#include "asset/assetfile.h"
-#include "rpg/overworld/chunk.h"
-
-typedef struct assetloading_s assetloading_t;
-typedef struct assetentry_s assetentry_t;
-
-typedef struct {
-  void *nothing;
-} assetchunkloaderinput_t;
-
-typedef enum {
-  ASSET_CHUNK_LOADING_STATE_INITIAL,
-  ASSET_CHUNK_LOADING_STATE_LOAD_JSON,
-  ASSET_CHUNK_LOADING_STATE_LOAD_MODELS
-} assetchunkloadingstate_t;
-
-typedef struct {
-  assetchunkloadingstate_t state;
-  uint8_t modelIndex;
-} assetchunkloaderloading_t;
-
-typedef struct {
-  tile_t *tiles;
-  uint8_t meshCount;
-  char_t modelNames[CHUNK_MESH_COUNT_MAX][CHUNK_MESH_NAME_MAX];
-  vec3 meshOffsets[CHUNK_MESH_COUNT_MAX];
-  assetentry_t *modelEntries[CHUNK_MESH_COUNT_MAX];
-} assetchunkoutput_t;
-
-/**
- * Asynchronous loader for chunk assets. No-op - the chunk's JSON file is
- * loaded via a JSON sub-asset in the sync phase (see assetChunkLoaderSync),
- * which handles its own async file I/O.
- *
- * @param loading Loading information for the asset being loaded.
- * @return Error code indicating success or failure of the load operation.
- */
-errorret_t assetChunkLoaderAsync(assetloading_t *loading);
-
-/**
- * Synchronous loader for chunk assets. Locks and parses the chunk's JSON
- * file (tiles plus referenced model paths/offsets), then locks each
- * referenced model asset before marking the entry loaded.
- *
- * Expected JSON shape:
- *   {
- *     "tiles": [ [shape, z], ... ]  // exactly CHUNK_TILE_COUNT entries,
- *                                   // one per (x, y) column, x-major
- *     "meshes": [
- *       { "model": "models/chunks/chunk_0_0_0_0.json",
- *         "offset": [0.0, 0.0, 0.0] }
- *     ]
- *   }
- * "meshes" is optional; each entry's "offset" defaults to [0, 0, 0] if
- * omitted. By convention mesh index 0 is the chunk's terrain and the
- * rest are props (see sceneOverworldDrawChunksBase/Props).
- *
- * @param loading Loading information for the asset being loaded.
- * @return Error code indicating success or failure of the load operation.
- */
-errorret_t assetChunkLoaderSync(assetloading_t *loading);
-
-/**
- * Disposer for chunk assets.
- *
- * @param entry Asset entry containing the chunk data to dispose.
- * @return Error code indicating success or failure of the dispose operation.
- */
-errorret_t assetChunkDispose(assetentry_t *entry);

src/dusk/asset/loader/dmf/assetmeshloader.c

@@ -127,14 +127,6 @@ errorret_t assetMeshLoaderSync(assetloading_t *loading) {
     errorChain(ret);
   }
 
-  #if defined(DUSK_OPENGL) && !defined(DUSK_OPENGL_LEGACY)
-    // VBO owns the data now; CPU copy is no longer needed. The platform
-    // mesh object itself still needs meshDispose later - tracked via
-    // out->meshInitialized, independent of the CPU buffer's lifetime.
-    memoryFree(out->vertices);
-    out->vertices = NULL;
-  #endif
-
   loading->entry->state = ASSET_ENTRY_STATE_LOADED;
   errorOk();
 }

src/dusk/console/console.c

@@ -42,6 +42,7 @@ void consolePrint(const char_t *message, ...) {
     (CONSOLE_HISTORY_MAX - 1) * CONSOLE_LINE_MAX
   );
   memoryCopy(CONSOLE.line[CONSOLE_HISTORY_MAX - 1], buffer, len + 1);
+  CONSOLE.dirty = true;
 
   #ifdef DUSK_CONSOLE_POSIX
     threadMutexUnlock(&CONSOLE.printMutex);
@@ -55,7 +56,7 @@ void consoleUpdate(void) {
     if(TIME.dynamicUpdate) return;
   #endif
 
-  if(inputPressed(INPUT_ACTION_CONSOLE)) {
+  if(inputPressed(INPUT_BIND_CONSOLE)) {
     CONSOLE.visible = !CONSOLE.visible;
   }
 }

src/dusk/console/console.h

@@ -21,6 +21,11 @@ typedef struct {
   char_t line[CONSOLE_HISTORY_MAX][CONSOLE_LINE_MAX];
   bool_t visible;
 
+  // Set whenever the history changes; consumers rendering the console
+  // (e.g. uiConsoleDraw) check and clear this to know when their own
+  // cached representation of the history needs rebuilding.
+  bool_t dirty;
+
   #ifdef DUSK_CONSOLE_POSIX
     threadmutex_t printMutex;
   #endif

src/dusk/display/mesh/cube.c

@@ -12,8 +12,8 @@ mesh_t CUBE_MESH_SIMPLE;
 meshvertex_t CUBE_MESH_SIMPLE_VERTICES[CUBE_VERTEX_COUNT];
 
 errorret_t cubeInit() {
-  vec3 min = { 0.0f, 0.0f, 0.0f };
+  vec3 min = { -0.5f, -0.5f, -0.5f };
-  vec3 max = { 1.0f, 1.0f, 1.0f };
+  vec3 max = {  0.5f,  0.5f,  0.5f };
   cubeBuffer(CUBE_MESH_SIMPLE_VERTICES, min, max);
   errorChain(meshInit(
     &CUBE_MESH_SIMPLE,

src/dusk/display/mesh/cube.h

@@ -17,7 +17,9 @@ extern mesh_t CUBE_MESH_SIMPLE;
 extern meshvertex_t CUBE_MESH_SIMPLE_VERTICES[CUBE_VERTEX_COUNT];
 
 /**
- * Initializes the simple unit cube mesh (0,0,0) to (1,1,1).
+ * Initializes the simple unit cube mesh, centered at (0,0,0), spanning
+ * (-0.5,-0.5,-0.5) to (0.5,0.5,0.5) -- matching the centered convention
+ * physics shapes and the sphere mesh use (position = center).
  *
  * @return Error for initialization of the cube mesh.
  */

src/dusk/display/mesh/plane.c

@@ -59,7 +59,8 @@ void planeBuffer(
 
   switch(axis) {
     case PLANE_AXIS_XY: {
-      /* Flat in XY at z = min[2]; spans X and Y. */
+      // Flat in XY at z = min[2]; spans X and Y.
+      // +Z normal: CCW when viewed from +Z (matches cube.c's front face).
       const float_t z = min[2];
       PLANE_VERT(0, min[0], min[1], z, u0, v0)
       PLANE_VERT(1, max[0], min[1], z, u1, v0)
@@ -71,19 +72,24 @@ void planeBuffer(
     }
 
     case PLANE_AXIS_XZ: {
-      /* Flat in XZ at y = min[1]; spans X and Z. */
+      // Flat in XZ at y = min[1]; spans X and Z.
+      // +Y normal: CCW when viewed from +Y (matches cube.c's top face).
+      // X and Z swap handedness relative to XY/YZ (right-hand rule with Y
+      // up), so the corner order here is deliberately not a straight copy
+      // of the XY/YZ pattern -- copying it as-is would flip this to -Y.
       const float_t y = min[1];
       PLANE_VERT(0, min[0], y, min[2], u0, v0)
-      PLANE_VERT(1, max[0], y, min[2], u1, v0)
+      PLANE_VERT(1, max[0], y, max[2], u1, v1)
-      PLANE_VERT(2, max[0], y, max[2], u1, v1)
+      PLANE_VERT(2, max[0], y, min[2], u1, v0)
       PLANE_VERT(3, min[0], y, min[2], u0, v0)
-      PLANE_VERT(4, max[0], y, max[2], u1, v1)
+      PLANE_VERT(4, min[0], y, max[2], u0, v1)
-      PLANE_VERT(5, min[0], y, max[2], u0, v1)
+      PLANE_VERT(5, max[0], y, max[2], u1, v1)
       break;
     }
 
     case PLANE_AXIS_YZ: {
-      /* Flat in YZ at x = min[0]; spans Y and Z. */
+      // Flat in YZ at x = min[0]; spans Y and Z.
+      // +X normal: CCW when viewed from +X (matches cube.c's right face).
       const float_t x = min[0];
       PLANE_VERT(0, x, min[1], min[2], u0, v0)
       PLANE_VERT(1, x, max[1], min[2], u1, v0)

src/dusk/display/shader/shader.c

@@ -21,6 +21,7 @@ errorret_t shaderInit(shader_t *shader, const shaderdefinition_t *def) {
 
 errorret_t shaderBind(shader_t *shader) {
   assertNotNull(shader, "Shader cannot be null");
+  if(bound == shader) errorOk();
   errorChain(shaderBindPlatform(shader));
   bound = shader;
   errorOk();

src/dusk/display/spritebatch/spritebatchsprite.c

@@ -39,3 +39,16 @@ spritebatchsprite_t spriteBatchSpriteTilesetPosition(
   sprite.uvMax[1] = uv[3];
   return sprite;
 }
+
+spritebatchsprite_t spriteBatchSpriteTranslate(
+  const spritebatchsprite_t *sprite,
+  const float_t x,
+  const float_t y
+) {
+  spritebatchsprite_t out = *sprite;
+  out.min[0] += x;
+  out.min[1] += y;
+  out.max[0] += x;
+  out.max[1] += y;
+  return out;
+}

src/dusk/display/spritebatch/spritebatchsprite.h

@@ -38,3 +38,19 @@ spritebatchsprite_t spriteBatchSpriteTilesetPosition(
   const float_t width,
   const float_t height
 );
+
+/**
+ * Returns a copy of sprite translated by (x, y). Used to reposition a
+ * sprite cached relative to origin (0,0) at draw time, instead of
+ * re-deriving its geometry from scratch every frame.
+ *
+ * @param sprite The cached sprite, relative to origin (0,0).
+ * @param x X offset to translate by.
+ * @param y Y offset to translate by.
+ * @returns The translated sprite.
+ */
+spritebatchsprite_t spriteBatchSpriteTranslate(
+  const spritebatchsprite_t *sprite,
+  const float_t x,
+  const float_t y
+);

src/dusk/display/text/CMakeLists.txt

@@ -6,5 +6,6 @@
 # Sources
 target_sources(${DUSK_LIBRARY_TARGET_NAME}
   PUBLIC
+    font.c
     text.c
 )

src/dusk/display/text/font.c

@@ -0,0 +1,168 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "font.h"
+#include "util/memory.h"
+#include "util/math.h"
+#include "display/color.h"
+
+font_t FONT_DEFAULT;
+static texture_t FONT_DEFAULT_TEXTURE;
+static tileset_t FONT_DEFAULT_TILESET;
+
+const uint8_t FONT_DEFAULT_GLYPHS[FONT_DEFAULT_TILE_COUNT][
+  FONT_DEFAULT_TILE_HEIGHT
+] = {
+  { 0x00, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00, 0x10, 0x00, 0x00 }, // !
+  { 0x00, 0x14, 0x14, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // "
+  { 0x00, 0x14, 0x14, 0x3E, 0x14, 0x3E, 0x14, 0x14, 0x00, 0x00 }, // #
+  { 0x00, 0x08, 0x1E, 0x28, 0x1C, 0x0A, 0x3C, 0x08, 0x00, 0x00 }, // $
+  { 0x00, 0x00, 0x22, 0x24, 0x08, 0x12, 0x22, 0x00, 0x00, 0x00 }, // %
+  { 0x00, 0x08, 0x14, 0x14, 0x1A, 0x24, 0x24, 0x1A, 0x00, 0x00 }, // &
+  { 0x00, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // '
+  { 0x00, 0x04, 0x08, 0x08, 0x08, 0x08, 0x08, 0x04, 0x00, 0x00 }, // (
+  { 0x00, 0x10, 0x08, 0x08, 0x08, 0x08, 0x08, 0x10, 0x00, 0x00 }, // )
+  { 0x00, 0x00, 0x08, 0x2A, 0x1C, 0x2A, 0x08, 0x00, 0x00, 0x00 }, // *
+  { 0x00, 0x00, 0x08, 0x08, 0x3E, 0x08, 0x08, 0x00, 0x00, 0x00 }, // +
+  { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x10, 0x20, 0x00 }, // ,
+  { 0x00, 0x00, 0x00, 0x00, 0x3E, 0x00, 0x00, 0x00, 0x00, 0x00 }, // -
+  { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x10, 0x00, 0x00 }, // .
+  { 0x00, 0x04, 0x04, 0x08, 0x08, 0x08, 0x10, 0x10, 0x00, 0x00 }, // /
+  { 0x00, 0x1C, 0x22, 0x26, 0x2A, 0x32, 0x22, 0x1C, 0x00, 0x00 }, // 0
+  { 0x00, 0x08, 0x18, 0x08, 0x08, 0x08, 0x08, 0x3E, 0x00, 0x00 }, // 1
+  { 0x00, 0x1C, 0x22, 0x02, 0x04, 0x08, 0x10, 0x3E, 0x00, 0x00 }, // 2
+  { 0x00, 0x1C, 0x22, 0x02, 0x0C, 0x02, 0x22, 0x1C, 0x00, 0x00 }, // 3
+  { 0x00, 0x22, 0x22, 0x22, 0x3E, 0x02, 0x02, 0x02, 0x00, 0x00 }, // 4
+  { 0x00, 0x3E, 0x20, 0x20, 0x3C, 0x02, 0x22, 0x1C, 0x00, 0x00 }, // 5
+  { 0x00, 0x1C, 0x20, 0x20, 0x3C, 0x22, 0x22, 0x1C, 0x00, 0x00 }, // 6
+  { 0x00, 0x3E, 0x02, 0x02, 0x04, 0x08, 0x08, 0x08, 0x00, 0x00 }, // 7
+  { 0x00, 0x1C, 0x22, 0x22, 0x1C, 0x22, 0x22, 0x1C, 0x00, 0x00 }, // 8
+  { 0x00, 0x1C, 0x22, 0x22, 0x1E, 0x02, 0x22, 0x1C, 0x00, 0x00 }, // 9
+  { 0x00, 0x00, 0x10, 0x10, 0x00, 0x10, 0x10, 0x00, 0x00, 0x00 }, // :
+  { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // ;
+  { 0x00, 0x04, 0x08, 0x10, 0x20, 0x10, 0x08, 0x04, 0x00, 0x00 }, // <
+  { 0x00, 0x00, 0x00, 0x3E, 0x00, 0x3E, 0x00, 0x00, 0x00, 0x00 }, // =
+  { 0x00, 0x10, 0x08, 0x04, 0x02, 0x04, 0x08, 0x10, 0x00, 0x00 }, // >
+  { 0x00, 0x1C, 0x22, 0x02, 0x04, 0x08, 0x00, 0x08, 0x00, 0x00 }, // ?
+  { 0x00, 0x1C, 0x26, 0x2A, 0x2A, 0x26, 0x20, 0x1C, 0x00, 0x00 }, // @
+  { 0x00, 0x1C, 0x22, 0x22, 0x22, 0x3E, 0x22, 0x22, 0x00, 0x00 }, // A
+  { 0x00, 0x3C, 0x22, 0x22, 0x3C, 0x22, 0x22, 0x3C, 0x00, 0x00 }, // B
+  { 0x00, 0x1C, 0x22, 0x20, 0x20, 0x20, 0x22, 0x1C, 0x00, 0x00 }, // C
+  { 0x00, 0x3C, 0x22, 0x22, 0x22, 0x22, 0x22, 0x3C, 0x00, 0x00 }, // D
+  { 0x00, 0x3E, 0x20, 0x20, 0x3C, 0x20, 0x20, 0x3E, 0x00, 0x00 }, // E
+  { 0x00, 0x3E, 0x20, 0x20, 0x3C, 0x20, 0x20, 0x20, 0x00, 0x00 }, // F
+  { 0x00, 0x1C, 0x22, 0x20, 0x2E, 0x22, 0x22, 0x1C, 0x00, 0x00 }, // G
+  { 0x00, 0x22, 0x22, 0x22, 0x3E, 0x22, 0x22, 0x22, 0x00, 0x00 }, // H
+  { 0x00, 0x3E, 0x08, 0x08, 0x08, 0x08, 0x08, 0x3E, 0x00, 0x00 }, // I
+  { 0x00, 0x02, 0x02, 0x02, 0x02, 0x22, 0x22, 0x1C, 0x00, 0x00 }, // J
+  { 0x00, 0x22, 0x24, 0x28, 0x30, 0x28, 0x24, 0x22, 0x00, 0x00 }, // K
+  { 0x00, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x3E, 0x00, 0x00 }, // L
+  { 0x00, 0x22, 0x36, 0x2A, 0x22, 0x22, 0x22, 0x22, 0x00, 0x00 }, // M
+  { 0x00, 0x22, 0x22, 0x32, 0x2A, 0x26, 0x22, 0x22, 0x00, 0x00 }, // N
+  { 0x00, 0x1C, 0x22, 0x22, 0x22, 0x22, 0x22, 0x1C, 0x00, 0x00 }, // O
+  { 0x00, 0x3C, 0x22, 0x22, 0x3C, 0x20, 0x20, 0x20, 0x00, 0x00 }, // P
+  { 0x00, 0x1C, 0x22, 0x22, 0x22, 0x22, 0x22, 0x1C, 0x06, 0x00 }, // Q
+  { 0x00, 0x3C, 0x22, 0x22, 0x3C, 0x22, 0x22, 0x22, 0x00, 0x00 }, // R
+  { 0x00, 0x1C, 0x22, 0x20, 0x1C, 0x02, 0x22, 0x1C, 0x00, 0x00 }, // S
+  { 0x00, 0x3E, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00, 0x00 }, // T
+  { 0x00, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x1C, 0x00, 0x00 }, // U
+  { 0x00, 0x22, 0x22, 0x22, 0x22, 0x14, 0x14, 0x08, 0x00, 0x00 }, // V
+  { 0x00, 0x22, 0x22, 0x22, 0x22, 0x2A, 0x36, 0x22, 0x00, 0x00 }, // W
+  { 0x00, 0x22, 0x22, 0x14, 0x08, 0x14, 0x22, 0x22, 0x00, 0x00 }, // X
+  { 0x00, 0x22, 0x22, 0x14, 0x08, 0x08, 0x08, 0x08, 0x00, 0x00 }, // Y
+  { 0x00, 0x3E, 0x02, 0x04, 0x08, 0x10, 0x20, 0x3E, 0x00, 0x00 }, // Z
+  { 0x00, 0x0C, 0x08, 0x08, 0x08, 0x08, 0x08, 0x0C, 0x00, 0x00 }, // [
+  { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // backslash (not drawn in source font)
+  { 0x00, 0x18, 0x08, 0x08, 0x08, 0x08, 0x08, 0x18, 0x00, 0x00 }, // ]
+  { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // ^ (not drawn in source font)
+  { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // _ (not drawn in source font)
+  { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // ` (not drawn in source font)
+  { 0x00, 0x00, 0x00, 0x1E, 0x22, 0x22, 0x22, 0x1E, 0x00, 0x00 }, // a
+  { 0x00, 0x20, 0x20, 0x3C, 0x22, 0x22, 0x22, 0x3C, 0x00, 0x00 }, // b
+  { 0x00, 0x00, 0x00, 0x1C, 0x22, 0x20, 0x22, 0x1C, 0x00, 0x00 }, // c
+  { 0x00, 0x02, 0x02, 0x1E, 0x22, 0x22, 0x22, 0x1E, 0x00, 0x00 }, // d
+  { 0x00, 0x00, 0x00, 0x1C, 0x22, 0x3E, 0x20, 0x1C, 0x00, 0x00 }, // e
+  { 0x00, 0x0C, 0x12, 0x10, 0x3C, 0x10, 0x10, 0x10, 0x00, 0x00 }, // f
+  { 0x00, 0x00, 0x00, 0x1E, 0x22, 0x22, 0x22, 0x1E, 0x02, 0x1C }, // g
+  { 0x00, 0x20, 0x20, 0x3C, 0x22, 0x22, 0x22, 0x22, 0x00, 0x00 }, // h
+  { 0x00, 0x08, 0x00, 0x18, 0x08, 0x08, 0x08, 0x3E, 0x00, 0x00 }, // i
+  { 0x00, 0x02, 0x00, 0x06, 0x02, 0x02, 0x02, 0x02, 0x22, 0x1C }, // j
+  { 0x00, 0x20, 0x20, 0x22, 0x24, 0x38, 0x24, 0x22, 0x00, 0x00 }, // k
+  { 0x00, 0x30, 0x10, 0x10, 0x10, 0x10, 0x10, 0x0E, 0x00, 0x00 }, // l
+  { 0x00, 0x00, 0x00, 0x3C, 0x2A, 0x2A, 0x2A, 0x2A, 0x00, 0x00 }, // m
+  { 0x00, 0x00, 0x00, 0x3C, 0x22, 0x22, 0x22, 0x22, 0x00, 0x00 }, // n
+  { 0x00, 0x00, 0x00, 0x1C, 0x22, 0x22, 0x22, 0x1C, 0x00, 0x00 }, // o
+  { 0x00, 0x00, 0x00, 0x3C, 0x22, 0x22, 0x22, 0x3C, 0x20, 0x20 }, // p
+  { 0x00, 0x00, 0x00, 0x1E, 0x22, 0x22, 0x22, 0x1E, 0x02, 0x02 }, // q
+  { 0x00, 0x00, 0x00, 0x2C, 0x32, 0x20, 0x20, 0x20, 0x00, 0x00 }, // r
+  { 0x00, 0x00, 0x00, 0x1E, 0x20, 0x1C, 0x02, 0x3C, 0x00, 0x00 }, // s
+  { 0x00, 0x10, 0x10, 0x3C, 0x10, 0x10, 0x10, 0x0E, 0x00, 0x00 }, // t
+  { 0x00, 0x00, 0x00, 0x22, 0x22, 0x22, 0x22, 0x1E, 0x00, 0x00 }, // u
+  { 0x00, 0x00, 0x00, 0x22, 0x22, 0x22, 0x14, 0x08, 0x00, 0x00 }, // v
+  { 0x00, 0x00, 0x00, 0x22, 0x22, 0x2A, 0x2A, 0x14, 0x00, 0x00 }, // w
+  { 0x00, 0x00, 0x00, 0x22, 0x14, 0x08, 0x14, 0x22, 0x00, 0x00 }, // x
+  { 0x00, 0x00, 0x00, 0x22, 0x22, 0x22, 0x22, 0x1E, 0x02, 0x1C }, // y
+  { 0x00, 0x00, 0x00, 0x3E, 0x04, 0x08, 0x10, 0x3E, 0x00, 0x00 }, // z
+  { 0x00, 0x04, 0x08, 0x08, 0x10, 0x08, 0x08, 0x04, 0x00, 0x00 }, // {
+  { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // | (not drawn in source font)
+  { 0x00, 0x10, 0x08, 0x08, 0x04, 0x08, 0x08, 0x10, 0x00, 0x00 }, // }
+  { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // ~ (not drawn in source font)
+  { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // unused trailing tile
+  { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // unused trailing tile
+};
+
+errorret_t fontInitDefault(void) {
+  const int32_t width = (int32_t)mathNextPowTwo(
+    FONT_DEFAULT_COLUMNS * FONT_DEFAULT_TILE_WIDTH
+  );
+  const int32_t height = (int32_t)mathNextPowTwo(
+    FONT_DEFAULT_ROWS * FONT_DEFAULT_TILE_HEIGHT
+  );
+
+  color_t *pixels = memoryAllocate(sizeof(color_t) * width * height);
+  memoryZero(pixels, sizeof(color_t) * width * height);
+
+  for(uint16_t i = 0; i < FONT_DEFAULT_TILE_COUNT; i++) {
+    const uint16_t tileX = (i % FONT_DEFAULT_COLUMNS) * FONT_DEFAULT_TILE_WIDTH;
+    const uint16_t tileY = (i / FONT_DEFAULT_COLUMNS) * FONT_DEFAULT_TILE_HEIGHT;
+
+    for(uint8_t row = 0; row < FONT_DEFAULT_TILE_HEIGHT; row++) {
+      const uint8_t bits = FONT_DEFAULT_GLYPHS[i][row];
+
+      for(uint8_t col = 0; col < FONT_DEFAULT_TILE_WIDTH; col++) {
+        if(!((bits >> (FONT_DEFAULT_TILE_WIDTH - 1 - col)) & 1)) continue;
+        pixels[((tileY + row) * width) + (tileX + col)] = COLOR_WHITE;
+      }
+    }
+  }
+
+  FONT_DEFAULT_TILESET.tileWidth = FONT_DEFAULT_TILE_WIDTH;
+  FONT_DEFAULT_TILESET.tileHeight = FONT_DEFAULT_TILE_HEIGHT;
+  FONT_DEFAULT_TILESET.columns = FONT_DEFAULT_COLUMNS;
+  FONT_DEFAULT_TILESET.rows = FONT_DEFAULT_ROWS;
+  FONT_DEFAULT_TILESET.tileCount = FONT_DEFAULT_TILE_COUNT;
+  FONT_DEFAULT_TILESET.uv[0] = (float_t)FONT_DEFAULT_TILE_WIDTH / (float_t)width;
+  FONT_DEFAULT_TILESET.uv[1] = (float_t)FONT_DEFAULT_TILE_HEIGHT / (float_t)height;
+
+  const texturedata_t data = { .rgbaColors = pixels };
+  errorret_t textureResult = textureInit(
+    &FONT_DEFAULT_TEXTURE, width, height, TEXTURE_FORMAT_RGBA, data
+  );
+  memoryFree(pixels);
+  errorChain(textureResult);
+
+  FONT_DEFAULT.texture = &FONT_DEFAULT_TEXTURE;
+  FONT_DEFAULT.tileset = &FONT_DEFAULT_TILESET;
+  errorOk();
+}
+
+errorret_t fontDisposeDefault(void) {
+  errorChain(textureDispose(&FONT_DEFAULT_TEXTURE));
+  FONT_DEFAULT.texture = NULL;
+  FONT_DEFAULT.tileset = NULL;
+  errorOk();
+}

src/dusk/display/text/font.h

@@ -6,6 +6,7 @@
  */
 
 #pragma once
+#include "error/error.h"
 #include "display/texture/texture.h"
 #include "display/texture/tileset.h"
 
@@ -13,3 +14,53 @@ typedef struct {
   texture_t *texture;
   tileset_t *tileset;
 } font_t;
+
+/**
+ * Pixel width/height of a single default-font glyph tile. Matches the
+ * glyph grid baked into the (now retired) ui/minogram.png + .dtf asset
+ * pair this data was extracted from.
+ */
+#define FONT_DEFAULT_TILE_WIDTH 6
+#define FONT_DEFAULT_TILE_HEIGHT 10
+
+/** Grid layout of the generated default-font texture, in tiles. */
+#define FONT_DEFAULT_COLUMNS 16
+#define FONT_DEFAULT_ROWS 6
+
+/**
+ * Number of glyphs defined in FONT_DEFAULT_GLYPHS (FONT_DEFAULT_COLUMNS *
+ * FONT_DEFAULT_ROWS), covering the printable ASCII range starting at
+ * TEXT_CHAR_START ('!') plus a couple of unused trailing tiles.
+ */
+#define FONT_DEFAULT_TILE_COUNT (FONT_DEFAULT_COLUMNS * FONT_DEFAULT_ROWS)
+
+extern font_t FONT_DEFAULT;
+
+/**
+ * Hard coded bitmap data for the built-in default font, extracted
+ * pixel-for-pixel from the original ui/minogram.png glyph atlas (alpha
+ * >= 128 counts as set). Indexed [glyph][row], where glyph 0 corresponds
+ * to TEXT_CHAR_START ('!') and glyphs run consecutively through the
+ * printable ASCII range. Each row byte holds FONT_DEFAULT_TILE_WIDTH bit
+ * flags, one per pixel column: bit (FONT_DEFAULT_TILE_WIDTH - 1) is the
+ * leftmost pixel and bit 0 is the rightmost; 1 means the pixel is set,
+ * 0 means it is not.
+ */
+extern const uint8_t FONT_DEFAULT_GLYPHS[FONT_DEFAULT_TILE_COUNT][
+  FONT_DEFAULT_TILE_HEIGHT
+];
+
+/**
+ * Builds the built-in default font (texture + tileset) directly from
+ * FONT_DEFAULT_GLYPHS, without going through the asset system.
+ *
+ * @return Either an error or success result.
+ */
+errorret_t fontInitDefault(void);
+
+/**
+ * Disposes of the built-in default font created by fontInitDefault.
+ *
+ * @return Either an error or success result.
+ */
+errorret_t fontDisposeDefault(void);

src/dusk/display/text/text.c

@@ -9,34 +9,15 @@
 #include "assert/assert.h"
 #include "util/memory.h"
 #include "display/spritebatch/spritebatch.h"
-#include "asset/asset.h"
-#include "asset/loader/display/assettextureloader.h"
-#include "asset/loader/display/assettilesetloader.h"
 #include "display/shader/shaderunlit.h"
 
-font_t FONT_DEFAULT;
-
 errorret_t textInit(void) {
-  assetloaderinput_t input = { .texture = TEXTURE_FORMAT_RGBA };
+  errorChain(fontInitDefault());
-  assetentry_t *entryTexture = assetLock(
-    "ui/minogram.png", ASSET_LOADER_TYPE_TEXTURE, &input
-  );
-  assetentry_t *entryTileset = assetLock(
-    "ui/minogram.dtf", ASSET_LOADER_TYPE_TILESET, NULL
-  );
-  errorChain(assetRequireLoaded(entryTexture));
-  errorChain(assetRequireLoaded(entryTileset));
-
-  FONT_DEFAULT.texture = &entryTexture->data.texture;
-  FONT_DEFAULT.tileset = &entryTileset->data.tileset;
   errorOk();
 }
 
 errorret_t textDispose(void) {
-  FONT_DEFAULT.texture = NULL;
+  errorChain(fontDisposeDefault());
-  FONT_DEFAULT.tileset = NULL;
-  assetUnlock("ui/minogram.png");
-  assetUnlock("ui/minogram.dtf");
   errorOk();
 }
 
@@ -116,6 +97,89 @@ errorret_t textDraw(
   errorOk();
 }
 
+uint32_t textBuildSpriteCache(
+  const char_t *text,
+  const font_t *font,
+  spritebatchsprite_t *sprites,
+  const uint32_t spritesMax,
+  int32_t *outWidth,
+  int32_t *outHeight
+) {
+  assertNotNull(text, "Text cannot be NULL");
+  assertNotNull(font, "Font cannot be NULL");
+  assertNotNull(sprites, "Sprites cannot be NULL");
+  assertNotNull(outWidth, "Output width cannot be NULL");
+  assertNotNull(outHeight, "Output height cannot be NULL");
+
+  uint32_t count = 0;
+  float_t posX = 0.0f;
+  float_t posY = 0.0f;
+  int32_t width = 0;
+  int32_t lineWidth = 0;
+  int32_t height = font->tileset->tileHeight;
+
+  char_t c;
+  int32_t i = 0;
+  while((c = text[i++]) != '\0') {
+    if(c == '\n') {
+      if(lineWidth > width) width = lineWidth;
+      lineWidth = 0;
+      posX = 0.0f;
+      posY += font->tileset->tileHeight;
+      height += font->tileset->tileHeight;
+      continue;
+    }
+
+    if(c == ' ') {
+      posX += font->tileset->tileWidth;
+      lineWidth += font->tileset->tileWidth;
+      continue;
+    }
+
+    assertTrue(count < spritesMax, "Text produces too many sprites");
+    sprites[count++] = textGetSprite((vec2){ posX, posY }, c, font);
+
+    posX += font->tileset->tileWidth;
+    lineWidth += font->tileset->tileWidth;
+  }
+
+  if(lineWidth > width) width = lineWidth;
+  *outWidth = width;
+  *outHeight = height;
+  return count;
+}
+
+errorret_t textDrawSpriteCache(
+  const spritebatchsprite_t *sprites,
+  const uint32_t spriteCount,
+  spritebatchsprite_t *scratch,
+  const float_t x,
+  const float_t y,
+  const color_t color,
+  texture_t *texture
+) {
+  assertNotNull(scratch, "Scratch buffer cannot be NULL");
+  assertNotNull(texture, "Texture cannot be NULL");
+  if(spriteCount == 0) errorOk();
+
+  for(uint32_t i = 0; i < spriteCount; i++) {
+    scratch[i] = sprites[i];
+    scratch[i].min[0] += x;
+    scratch[i].min[1] += y;
+    scratch[i].max[0] += x;
+    scratch[i].max[1] += y;
+  }
+
+  shadermaterial_t material = {
+    .unlit = {
+      .color = color,
+      .texture = texture
+    }
+  };
+  errorChain(spriteBatchBuffer(scratch, spriteCount, &SHADER_UNLIT, material));
+  errorOk();
+}
+
 void textMeasure(
   const char_t *text,
   const font_t *font,

src/dusk/display/text/text.h

@@ -12,8 +12,6 @@
 
 #define TEXT_CHAR_START '!'
 
-extern font_t FONT_DEFAULT;
-
 /**
  * Initializes the text system.
  *
@@ -60,6 +58,54 @@ errorret_t textDraw(
   font_t *font
 );
 
+/**
+ * Builds a cache of sprites (glyph geometry + UVs, relative to origin
+ * 0,0) for a string of text. Callers that redraw the same text every
+ * frame (e.g. UI labels/widgets) should build this once and reuse it
+ * via textDrawSpriteCache, instead of re-deriving glyph geometry every
+ * frame the way textDraw does.
+ *
+ * @param text The null-terminated string to build sprites for.
+ * @param font Font to use for tile lookup.
+ * @param sprites Destination array to write sprites into.
+ * @param spritesMax Capacity of the sprites array.
+ * @param outWidth Pointer to store the measured width in pixels.
+ * @param outHeight Pointer to store the measured height in pixels.
+ * @return The number of sprites written.
+ */
+uint32_t textBuildSpriteCache(
+  const char_t *text,
+  const font_t *font,
+  spritebatchsprite_t *sprites,
+  const uint32_t spritesMax,
+  int32_t *outWidth,
+  int32_t *outHeight
+);
+
+/**
+ * Draws a previously-built sprite cache (see textBuildSpriteCache) at the
+ * given position in a single batched draw call.
+ *
+ * @param sprites Cached sprites, relative to origin 0,0.
+ * @param spriteCount Number of sprites in the cache.
+ * @param scratch Caller-owned scratch buffer, at least spriteCount
+ * entries, used to translate the cached sprites into position.
+ * @param x The x-coordinate to draw the text at.
+ * @param y The y-coordinate to draw the text at.
+ * @param color The color to draw the text in.
+ * @param texture The font's texture to sample glyphs from.
+ * @return Either an error or success result.
+ */
+errorret_t textDrawSpriteCache(
+  const spritebatchsprite_t *sprites,
+  const uint32_t spriteCount,
+  spritebatchsprite_t *scratch,
+  const float_t x,
+  const float_t y,
+  const color_t color,
+  texture_t *texture
+);
+
 /**
  * Measures the width and height of the given text string when rendered.
  *

src/dusk/engine/engine.c

@@ -10,17 +10,20 @@
 #include "time/time.h"
 #include "input/input.h"
 #include "locale/localemanager.h"
-#include "rpg/item/item.h"
-#include "rpg/rpg.h"
 #include "display/display.h"
 #include "scene/scene.h"
 #include "asset/asset.h"
+#include "script/scriptmanager.h"
+#include "script/module/scene/modulescene.h"
 #include "ui/ui.h"
 #include "assert/assert.h"
 #include "network/network.h"
+#include "game/game.h"
 #include "system/system.h"
 #include "console/console.h"
 #include "save/save.h"
+#include "save/savesettings.h"
+#include "log/log.h"
 
 engine_t ENGINE;
 
@@ -38,14 +41,15 @@ errorret_t engineInit(const int32_t argc, const char_t **argv) {
   errorChain(systemInit());
   errorChain(inputInit());
   errorChain(assetInit());
-  // errorChain(saveInit());
+  errorChain(scriptManagerInit());
+  errorChain(saveInit());
+  errorChain(saveSettingsLoad());
   errorChain(localeManagerInit());
-  errorChain(itemInit());
   errorChain(displayInit());
   errorChain(uiInit());
-  errorChain(rpgInit());
   errorChain(networkInit());
   errorChain(sceneInit());
+  errorChain(gameInit());
 
   consolePrint("Engine initialized");
 
@@ -55,8 +59,7 @@ errorret_t engineInit(const int32_t argc, const char_t **argv) {
     consolePrint("Assertions real");
   #endif
 
-  sceneSet(SCENE_TYPE_OVERWORLD);
+  // sceneSet(SCENE_TYPE_OVERWORLD);
-  
 
   errorOk();
 }
@@ -65,16 +68,27 @@ errorret_t engineUpdate(void) {
   // Order here is important.
   errorChain(networkUpdate());
   timeUpdate();
-  inputUpdate();
+
-  consoleUpdate();
+  const systemdialogtype_t dialogType = systemGetActiveDialogType();
-  errorChain(rpgUpdate());
+  if(dialogType == SYSTEM_DIALOG_TYPE_NONE) {
-  errorChain(sceneUpdate());
+    inputUpdate();
-  errorChain(assetUpdate());
+    consoleUpdate();
-  errorChain(uiUpdate());
+
+    errorChain(gameUpdate());
+    errorChain(moduleSceneUpdateCurrent());
+    errorChain(sceneUpdate());
+    errorChain(assetUpdate());
+    errorChain(uiUpdate());
+  }
 
   // Render
   errorChain(displayUpdate());
-  if(inputPressed(INPUT_ACTION_RAGEQUIT)) ENGINE.running = false;
+  if(
+    dialogType == SYSTEM_DIALOG_TYPE_NONE &&
+    inputPressed(INPUT_BIND_RAGEQUIT)
+  ) {
+    ENGINE.running = false;
+  }
   errorOk();
 }
 
@@ -83,14 +97,15 @@ void engineExit(void) {
 }
 
 errorret_t engineDispose(void) {
+  errorChain(gameDispose());
   errorChain(sceneDispose());
   errorChain(networkDispose());
-  errorChain(rpgDispose());
   localeManagerDispose();
   errorChain(uiDispose());
   consoleDispose();
   errorChain(displayDispose());
-  // errorChain(saveDispose());
+  errorChain(saveDispose());
+  errorChain(scriptManagerDispose());
   errorChain(assetDispose());
 
   errorOk();

src/dusk/engine/engine.h

@@ -37,4 +37,3 @@ errorret_t engineUpdate(void);
  * Shuts down the engine.
  */
 errorret_t engineDispose(void);
-

src/dusk/entity/CMakeLists.txt

@@ -0,0 +1,16 @@
+# Copyright (c) 2026 Dominic Masters
+#
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# Sources
+target_sources(${DUSK_LIBRARY_TARGET_NAME}
+  PUBLIC
+    entity.c
+    entitymanager.c
+    component.c
+    entityprefab.c
+)
+
+# Subdirs
+add_subdirectory(component)

src/dusk/entity/component.c

@@ -0,0 +1,152 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "entitymanager.h"
+#include "assert/assert.h"
+#include "util/memory.h"
+
+componentdefinition_t COMPONENT_DEFINITIONS[] = {
+  [COMPONENT_TYPE_NULL] = { 0 },
+
+  #define X(enm, type, field, iMethod, dMethod, rMethod) \
+    [COMPONENT_TYPE_##enm] = { \
+      .enumName = #enm, \
+      .name = #field, \
+      .init = iMethod, \
+      .dispose = dMethod, \
+      .render = rMethod \
+    },
+
+  #include "componentlist.h"
+  #undef X
+
+  [COMPONENT_TYPE_COUNT] = { 0 }
+};
+
+void componentInit(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const componenttype_t type
+) {
+  assertNotNull(mgr, "Entity manager cannot be null");
+  assertTrue(entityId < ENTITY_COUNT_MAX, "Entity ID OOB");
+  assertTrue(componentId < ENTITY_COMPONENT_COUNT_MAX, "Component ID OOB");
+  assertTrue(type < COMPONENT_TYPE_COUNT, "Component type OOB");
+  assertTrue(type != COMPONENT_TYPE_NULL, "Cannot initialize null component");
+
+  componentindex_t index = componentGetIndex(entityId, componentId);
+  component_t *cmp = &mgr->components[index];
+  memoryZero(cmp, sizeof(component_t));
+
+  cmp->type = type;
+  if(COMPONENT_DEFINITIONS[type].init) {
+    COMPONENT_DEFINITIONS[type].init(mgr, entityId, componentId);
+  }
+}
+
+void * componentGetData(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const componenttype_t type
+) {
+  assertNotNull(mgr, "Entity manager cannot be null");
+  assertTrue(entityId < ENTITY_COUNT_MAX, "Entity ID OOB");
+  assertTrue(componentId < ENTITY_COMPONENT_COUNT_MAX, "Component ID OOB");
+  assertTrue(type < COMPONENT_TYPE_COUNT, "Component type OOB");
+  assertTrue(type != COMPONENT_TYPE_NULL, "Cannot get data of null component");
+
+  componentindex_t index = componentGetIndex(entityId, componentId);
+  component_t *cmp = &mgr->components[index];
+  assertTrue(cmp->type == type, "Component type mismatch");
+
+  return &cmp->data;
+}
+
+componentindex_t componentGetIndex(
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  assertTrue(entityId < ENTITY_COUNT_MAX, "Entity ID OOB");
+  assertTrue(componentId < ENTITY_COMPONENT_COUNT_MAX, "Component ID OOB");
+  return (entityId * ENTITY_COMPONENT_COUNT_MAX) + componentId;
+}
+
+entityid_t componentGetEntitiesWithComponent(
+  entitymanager_t *mgr,
+  const componenttype_t type,
+  entityid_t outEntities[ENTITY_COUNT_MAX],
+  componentid_t outComponents[ENTITY_COUNT_MAX]
+) {
+  assertNotNull(mgr, "Entity manager cannot be null");
+  assertTrue(type < COMPONENT_TYPE_COUNT, "Component type OOB");
+  assertTrue(type != COMPONENT_TYPE_NULL, "Cannot check NULL type");
+  assertNotNull(outEntities, "Output entities array cannot be null");
+  assertNotNull(outComponents, "Output components array cannot be null");
+
+  entityid_t written = 0;
+  for(entityid_t i = 0; i < ENTITY_COUNT_MAX; i++) {
+    componentid_t used = mgr->entitiesWithComponent[
+      type * ENTITY_COUNT_MAX + i
+    ];
+    if(used == COMPONENT_ID_INVALID) continue;
+    assertTrue(
+      mgr->components[componentGetIndex(i, used)].type == type,
+      "Component type mismatch in entitiesWithComponent lookup"
+    );
+    assertTrue(
+      (mgr->entities[i].state & ENTITY_STATE_ACTIVE) != 0,
+      "Inactive entity in entitiesWithComponent lookup"
+    );
+    assertTrue(
+      used < ENTITY_COMPONENT_COUNT_MAX,
+      "Component ID OOB in entitiesWithComponent lookup"
+    );
+    assertTrue(
+      componentGetIndex(i,used) < ENTITY_COUNT_MAX*ENTITY_COMPONENT_COUNT_MAX,
+      "Component index OOB in entitiesWithComponent lookup"
+    );
+    outComponents[written] = used;
+    outEntities[written++] = i;
+  }
+  return written;
+}
+
+errorret_t componentRenderAll(entitymanager_t *mgr) {
+  assertNotNull(mgr, "Entity manager cannot be null");
+  for(entityid_t eid = 0; eid < ENTITY_COUNT_MAX; eid++) {
+    if(!(mgr->entities[eid].state & ENTITY_STATE_ACTIVE)) continue;
+    for(componentid_t cid = 0; cid < ENTITY_COMPONENT_COUNT_MAX; cid++) {
+      component_t *cmp = &mgr->components[componentGetIndex(eid, cid)];
+      if(cmp->type == COMPONENT_TYPE_NULL) continue;
+      if(!COMPONENT_DEFINITIONS[cmp->type].render) continue;
+      errorChain(COMPONENT_DEFINITIONS[cmp->type].render(mgr, eid, cid));
+    }
+  }
+  errorOk();
+}
+
+void componentDispose(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  assertNotNull(mgr, "Entity manager cannot be null");
+  assertTrue(entityId < ENTITY_COUNT_MAX, "Entity ID OOB");
+  assertTrue(componentId < ENTITY_COMPONENT_COUNT_MAX, "Component ID OOB");
+
+  componentindex_t index = componentGetIndex(entityId, componentId);
+  component_t *cmp = &mgr->components[index];
+  if(cmp->type == COMPONENT_TYPE_NULL) return;
+
+  if(COMPONENT_DEFINITIONS[cmp->type].dispose) {
+    COMPONENT_DEFINITIONS[cmp->type].dispose(mgr, entityId, componentId);
+  }
+
+  cmp->type = COMPONENT_TYPE_NULL;
+}

src/dusk/entity/component.h

@@ -0,0 +1,157 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "entitybase.h"
+#include "error/error.h"
+
+#define X(enumName, type, field, init, dispose, render) \
+  // do nothing
+#include "componentlist.h"
+#undef X
+
+typedef union {
+  #define X(enumName, type, field, init, dispose, render) type field;
+  #include "componentlist.h"
+  #undef X
+} componentdata_t;
+
+/**
+ * Callback signature for a component's init/dispose hooks.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ */
+typedef void (*componentcallback_t)(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Callback signature for a component's render hook.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return Error state.
+ */
+typedef errorret_t (*componentcallbackerror_t)(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+typedef struct {
+  const char_t *enumName;
+  const char_t *name;
+  componentcallback_t init;
+  componentcallback_t dispose;
+  componentcallbackerror_t render;
+} componentdefinition_t;
+
+typedef enum {
+  COMPONENT_TYPE_NULL,
+
+  #define X(enumName, type, field, init, dispose, render) \
+    COMPONENT_TYPE_##enumName,
+  #include "componentlist.h"
+  #undef X
+
+  COMPONENT_TYPE_COUNT
+} componenttype_t;
+
+typedef struct {
+  componenttype_t type;
+  componentdata_t data;
+} component_t;
+
+extern componentdefinition_t COMPONENT_DEFINITIONS[];
+
+/**
+ * Initializes a component of the given type for the entity with component ID.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param type The type of the component to initialize.
+ */
+void componentInit(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const componenttype_t type
+);
+
+/**
+ * Gets the pointer to the data of a component for the entity with component ID.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param type The type of the component to get, only used for assertion.
+ * @return A pointer to the component data.
+ */
+void * componentGetData(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const componenttype_t type
+);
+
+/**
+ * Gets the index of a component for the entity with component ID.
+ *
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return The index of the component in the component array.
+ */
+componentindex_t componentGetIndex(
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Gets the entity IDs of all entities with a component of the given type.
+ *
+ * @param mgr The entity manager to search.
+ * @param type The type of the component to get entities for.
+ * @param outEntities An array to write the entity IDs to, must be at least
+ * ENTITY_COUNT_MAX in size.
+ * @param outComponents An array to write the component IDs to.
+ * @return The number of entity IDs written to outEntities.
+ */
+entityid_t componentGetEntitiesWithComponent(
+  entitymanager_t *mgr,
+  const componenttype_t type,
+  entityid_t outEntities[ENTITY_COUNT_MAX],
+  componentid_t outComponents[ENTITY_COUNT_MAX]
+);
+
+/**
+ * Disposes of a component for the entity with component ID.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ */
+void componentDispose(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Calls the render callback on every active component that defines one.
+ * Iterates all active entities and all their component slots. No-op for
+ * components whose definition has render == NULL.
+ *
+ * @param mgr The entity manager to render.
+ * @return Error state.
+ */
+errorret_t componentRenderAll(entitymanager_t *mgr);

src/dusk/entity/component/CMakeLists.txt

@@ -0,0 +1,10 @@
+# Copyright (c) 2026 Dominic Masters
+#
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# Subdirs
+add_subdirectory(display)
+add_subdirectory(physics)
+add_subdirectory(trigger)
+add_subdirectory(animation)

src/dusk/entity/component/animation/CMakeLists.txt

@@ -6,5 +6,5 @@
 # Sources
 target_sources(${DUSK_LIBRARY_TARGET_NAME}
   PUBLIC
-    entityitem.c
+    entityanimation.c
 )

src/dusk/entity/component/animation/entityanimation.c

@@ -0,0 +1,114 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "entityanimation.h"
+#include "entity/entitymanager.h"
+#include "util/memory.h"
+
+void entityAnimationInit(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entityanimation_t *animComp = entityAnimationGet(mgr, entityId, componentId);
+
+  memoryZero(animComp, sizeof(entityanimation_t));
+
+  entityUpdateAdd(mgr, entityId, entityAnimationUpdate, componentId, NULL);
+}
+
+entityanimation_t *entityAnimationGet(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  return componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_ANIMATION
+  );
+}
+
+void entityAnimationSetKeyframes(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  keyframe_t **channelTracks,
+  uint16_t *channelTrackCounts,
+  const uint16_t channelCount
+) {
+  entityanimation_t *animComp = entityAnimationGet(mgr, entityId, componentId);
+  animationInit(
+    &animComp->anim, channelTracks, channelTrackCounts, channelCount
+  );
+}
+
+void entityAnimationPlay(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entityanimation_t *animComp = entityAnimationGet(mgr, entityId, componentId);
+  animComp->anim.time = 0.0f;
+  animComp->anim.playing = true;
+}
+
+void entityAnimationStop(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entityanimation_t *animComp = entityAnimationGet(mgr, entityId, componentId);
+  animComp->anim.playing = false;
+}
+
+bool_t entityAnimationIsPlaying(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entityanimation_t *animComp = entityAnimationGet(mgr, entityId, componentId);
+  return animComp->anim.playing;
+}
+
+void entityAnimationSetLoop(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const bool_t loop
+) {
+  entityanimation_t *animComp = entityAnimationGet(mgr, entityId, componentId);
+  animComp->anim.loop = loop;
+}
+
+void entityAnimationSetSpeed(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const float_t speed
+) {
+  entityanimation_t *animComp = entityAnimationGet(mgr, entityId, componentId);
+  animComp->anim.speed = speed;
+}
+
+float_t entityAnimationGetValue(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const uint16_t channelIndex
+) {
+  entityanimation_t *animComp = entityAnimationGet(mgr, entityId, componentId);
+  return animationGetValue(&animComp->anim, channelIndex);
+}
+
+void entityAnimationUpdate(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  void *user
+) {
+  entityanimation_t *animComp = entityAnimationGet(mgr, entityId, componentId);
+  animationUpdate(&animComp->anim);
+}

src/dusk/entity/component/animation/entityanimation.h

@@ -0,0 +1,176 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "entity/entitybase.h"
+#include "animation/animation.h"
+
+typedef struct {
+  animation_t anim;
+} entityanimation_t;
+
+/**
+ * Initializes the animation component: no keyframes set, and registers
+ * entityAnimationUpdate as an update callback. Call
+ * entityAnimationSetKeyframes() before entityAnimationPlay().
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ */
+void entityAnimationInit(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Gets the underlying animation structure (temporarily) for the given
+ * entity. Prefer the dedicated getters/setters where possible.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return The animation component data for the given entity and
+ * component ID.
+ */
+entityanimation_t *entityAnimationGet(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Sets the entity's keyframes, stopped, at speed 1.0, non-looping. See
+ * keyframeSetInit() -- channelTracks/channelTrackCounts and the
+ * keyframe_t arrays they point to are not copied, and must outlive this
+ * component (e.g. static/const arrays owned by the caller).
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param channelTracks Array of channelCount keyframe_t arrays -- one per
+ * animated channel (e.g. position.x/y/z), sharing this animation's
+ * timeline.
+ * @param channelTrackCounts Array of channelCount keyframe counts,
+ * matching channelTracks.
+ * @param channelCount The number of channels.
+ */
+void entityAnimationSetKeyframes(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  keyframe_t **channelTracks,
+  uint16_t *channelTrackCounts,
+  const uint16_t channelCount
+);
+
+/**
+ * Starts (or restarts) playback from time 0.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ */
+void entityAnimationPlay(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Stops playback without resetting the current time.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ */
+void entityAnimationStop(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Checks whether the animation is currently playing.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return True if playing.
+ */
+bool_t entityAnimationIsPlaying(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Sets whether the animation loops on reaching its final keyframe, rather
+ * than stopping there.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param loop True to loop, false to stop at the end.
+ */
+void entityAnimationSetLoop(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const bool_t loop
+);
+
+/**
+ * Sets the animation's playback rate multiplier.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param speed The new playback rate; 1.0 = normal speed.
+ */
+void entityAnimationSetSpeed(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const float_t speed
+);
+
+/**
+ * Evaluates one of the animation's channels at its current playback
+ * time, regardless of whether it's currently playing.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param channelIndex The channel to evaluate, in [0, channelCount) as
+ * passed to entityAnimationSetKeyframes().
+ * @return That channel's value at the current time.
+ */
+float_t entityAnimationGetValue(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const uint16_t channelIndex
+);
+
+/**
+ * Per-tick update for the animation component: calls animationUpdate()
+ * (a no-op if not playing). Registered automatically as an update
+ * callback by entityAnimationInit.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param user Unused.
+ */
+void entityAnimationUpdate(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  void *user
+);

src/dusk/entity/component/display/CMakeLists.txt

@@ -6,8 +6,7 @@
 # Sources
 target_sources(${DUSK_LIBRARY_TARGET_NAME}
   PUBLIC
-    npc.c
+    entityposition.c
-    npcturn.c
+    entitycamera.c
-    npcwalk.c
+    entityrenderable.c
-    npcpath.c
 )

src/dusk/entity/component/display/entitycamera.c

@@ -0,0 +1,140 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "entity/entitymanager.h"
+#include "entity/entity.h"
+#include "entity/component/display/entityposition.h"
+#include "display/screen/screen.h"
+
+void entityCameraInit(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entitycamera_t *cam = (entitycamera_t *)componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_CAMERA
+  );
+  cam->nearClip = 0.1f;
+  cam->farClip = 5000.0f;
+  cam->projType = ENTITY_CAMERA_PROJECTION_TYPE_PERSPECTIVE;
+  cam->perspective.fov = glm_rad(45.0f);
+}
+
+void entityCameraGetProjection(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  mat4 out
+) {
+  entitycamera_t *cam = (entitycamera_t *)componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_CAMERA
+  );
+
+  if(
+    cam->projType == ENTITY_CAMERA_PROJECTION_TYPE_PERSPECTIVE ||
+    cam->projType == ENTITY_CAMERA_PROJECTION_TYPE_PERSPECTIVE_FLIPPED
+  ) {
+    glm_mat4_identity(out);
+    glm_perspective(
+      cam->perspective.fov,
+      SCREEN.aspect,
+      cam->nearClip,
+      cam->farClip,
+      out
+    );
+
+    if(cam->projType == ENTITY_CAMERA_PROJECTION_TYPE_PERSPECTIVE_FLIPPED) {
+      out[1][1] *= -1.0f;
+    }
+  } else if(cam->projType == ENTITY_CAMERA_PROJECTION_TYPE_ORTHOGRAPHIC) {
+    glm_mat4_identity(out);
+    glm_ortho(
+      cam->orthographic.left,
+      cam->orthographic.right,
+      cam->orthographic.top,
+      cam->orthographic.bottom,
+      cam->nearClip,
+      cam->farClip,
+      out
+    );
+  }
+}
+
+entityid_t entityCameraGetCurrent(entitymanager_t *mgr) {
+  entityid_t camEnts[ENTITY_COUNT_MAX];
+  componentid_t camComps[ENTITY_COUNT_MAX];
+  entityid_t count = componentGetEntitiesWithComponent(
+    mgr, COMPONENT_TYPE_CAMERA, camEnts, camComps
+  );
+  if(count == 0) return ENTITY_ID_INVALID;
+  return camEnts[0];
+}
+
+void entityCameraGetForward(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  vec2 out
+) {
+  componentid_t posComp = entityGetComponent(
+    mgr, entityId, COMPONENT_TYPE_POSITION
+  );
+  mat4 transform;
+  entityPositionGetTransform(mgr, entityId, posComp, transform);
+  // transform is an object->world matrix; column 2 is the entity's local Z
+  // axis expressed in world space. Cameras look down their local -Z.
+  float_t fx = -transform[2][0];
+  float_t fz = -transform[2][2];
+  float_t len = sqrtf(fx * fx + fz * fz);
+  if(len > 1e-6f) { fx /= len; fz /= len; }
+  out[0] = fx;
+  out[1] = fz;
+}
+
+void entityCameraGetRight(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  vec2 out
+) {
+  componentid_t posComp = entityGetComponent(
+    mgr, entityId, COMPONENT_TYPE_POSITION
+  );
+  mat4 transform;
+  entityPositionGetTransform(mgr, entityId, posComp, transform);
+  // transform is an object->world matrix; column 0 is the entity's local X
+  // (right) axis expressed in world space.
+  float_t rx = transform[0][0];
+  float_t rz = transform[0][2];
+  float_t len = sqrtf(rx * rx + rz * rz);
+  if(len > 1e-6f) { rx /= len; rz /= len; }
+  out[0] = rx;
+  out[1] = rz;
+}
+
+void entityCameraLookAtPixelPerfect(
+  entitymanager_t *mgr,
+  const entityid_t ent,
+  const componentid_t posComp,
+  const componentid_t camComp,
+  const vec3 point,
+  const vec3 eyeOffset,
+  const float_t scale
+) {
+  entitycamera_t *cam = (entitycamera_t *)componentGetData(
+    mgr, ent, camComp, COMPONENT_TYPE_CAMERA
+  );
+  float_t dist = (
+    (float_t)SCREEN.height / (2.0f * scale * tanf(cam->perspective.fov * 0.5f))
+  );
+
+  vec3 eye = {
+    point[0] + eyeOffset[0],
+    point[1] + dist + eyeOffset[1],
+    point[2] + eyeOffset[2]
+  };
+  vec3 up = { 0.0f, 0.0f, -1.0f };
+  entityPositionLookAt(mgr, ent, posComp, eye, (float_t *)point, up);
+}

src/dusk/entity/component/display/entitycamera.h

@@ -0,0 +1,122 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "entity/entitybase.h"
+#include "error/error.h"
+
+typedef enum {
+  ENTITY_CAMERA_PROJECTION_TYPE_PERSPECTIVE,
+  ENTITY_CAMERA_PROJECTION_TYPE_PERSPECTIVE_FLIPPED,
+  ENTITY_CAMERA_PROJECTION_TYPE_ORTHOGRAPHIC
+} entitycameraprojectiontype_t;
+
+typedef struct {
+  union {
+    struct {
+      float_t fov;
+    } perspective;
+
+    struct {
+      float_t left;
+      float_t right;
+      float_t top;
+      float_t bottom;
+    } orthographic;
+  };
+
+  float_t nearClip;
+  float_t farClip;
+  entitycameraprojectiontype_t projType;
+} entitycamera_t;
+
+/**
+ * Initializes an entity camera component.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ */
+void entityCameraInit(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Renders out the projection matrix for the given camera.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param out The output projection matrix.
+ */
+void entityCameraGetProjection(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  mat4 out
+);
+
+/**
+ * Returns the entity ID of the first active camera, or ENTITY_ID_INVALID if
+ * none are active.
+ *
+ * @param mgr The entity manager to search.
+ */
+entityid_t entityCameraGetCurrent(entitymanager_t *mgr);
+
+/**
+ * Gets the camera's horizontal forward direction (XZ plane) from its
+ * position component. Automatically finds the position component on the
+ * entity.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The camera entity ID.
+ * @param out Output vec2: {forwardX, forwardZ} normalized.
+ */
+void entityCameraGetForward(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  vec2 out
+);
+
+/**
+ * Gets the camera's horizontal right direction (XZ plane) from its position
+ * component. Automatically finds the position component on the entity.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The camera entity ID.
+ * @param out Output vec2: {rightX, rightZ} normalized.
+ */
+void entityCameraGetRight(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  vec2 out
+);
+
+/**
+ * Positions the camera to look at a 3D point at a pixel-perfect distance
+ * derived from the camera's FOV and screen height.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param ent The camera entity ID.
+ * @param posComp The position component ID.
+ * @param camComp The camera component ID.
+ * @param point World position to look at.
+ * @param eyeOffset Offset added to the eye position only (not the target).
+ * @param scale Pixels per world unit. 1.0 = pixel perfect, 2.0 = 2px per unit.
+ */
+void entityCameraLookAtPixelPerfect(
+  entitymanager_t *mgr,
+  const entityid_t ent,
+  const componentid_t posComp,
+  const componentid_t camComp,
+  const vec3 point,
+  const vec3 eyeOffset,
+  const float_t scale
+);

src/dusk/entity/component/display/entityposition.c

@@ -0,0 +1,669 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "entity/entitymanager.h"
+#include "assert/assert.h"
+
+void entityPositionInit(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+
+  pos->flags = 0;
+  pos->parentEntityId = ENTITY_ID_INVALID;
+  pos->parentComponentId = COMPONENT_ID_INVALID;
+  pos->childCount = 0;
+  glm_vec3_zero(pos->position);
+  glm_vec3_zero(pos->rotation);
+  glm_vec3_one(pos->scale);
+  glm_mat4_identity(pos->localTransform);
+  glm_mat4_identity(pos->worldTransform);
+}
+
+void entityPositionLookAt(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 eye,
+  vec3 target,
+  vec3 up
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+  // glm_lookat() produces a view matrix (world -> eye space). Every other
+  // setter treats localTransform as this entity's placement in world space
+  // (eye -> world), so invert it here to keep that meaning consistent --
+  // callers that need a view matrix (e.g. scene rendering) invert it back.
+  mat4 view;
+  glm_lookat(eye, target, up, view);
+  glm_mat4_inv(view, pos->localTransform);
+  // localTransform is now authoritative; PRS cache is stale.
+  pos->flags = (pos->flags | ENTITY_POSITION_FLAG_PRS_DIRTY)
+    & ~(ENTITY_POSITION_FLAG_ROTATION_DIRTY |
+        ENTITY_POSITION_FLAG_POSITION_DIRTY);
+  entityPositionMarkDirty(mgr, pos);
+}
+
+void entityPositionGetTransform(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  mat4 dest
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+  entityPositionEnsureWorld(mgr, pos);
+  glm_mat4_copy(
+    pos->parentEntityId == ENTITY_ID_INVALID
+      ? pos->localTransform : pos->worldTransform,
+    dest
+  );
+}
+
+void entityPositionGetLocalTransform(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  mat4 dest
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+  entityPositionEnsureLocal(pos);
+  glm_mat4_copy(pos->localTransform, dest);
+}
+
+void entityPositionGetLocalPosition(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 dest
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+  entityPositionEnsurePRS(pos);
+  glm_vec3_copy(pos->position, dest);
+}
+
+void entityPositionGetWorldPosition(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 dest
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+  if(pos->parentEntityId == ENTITY_ID_INVALID) {
+    entityPositionEnsurePRS(pos);
+    glm_vec3_copy(pos->position, dest);
+    return;
+  }
+  entityPositionEnsureWorld(mgr, pos);
+  dest[0] = pos->worldTransform[3][0];
+  dest[1] = pos->worldTransform[3][1];
+  dest[2] = pos->worldTransform[3][2];
+}
+
+void entityPositionSetWorldPosition(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 position
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+  if(pos->parentEntityId == ENTITY_ID_INVALID) {
+    glm_vec3_copy(position, pos->position);
+    pos->flags = (pos->flags | ENTITY_POSITION_FLAG_POSITION_DIRTY)
+               & ~ENTITY_POSITION_FLAG_PRS_DIRTY;
+    entityPositionMarkDirty(mgr, pos);
+    return;
+  }
+  entityposition_t *parent = componentGetData(
+    mgr, pos->parentEntityId, pos->parentComponentId, COMPONENT_TYPE_POSITION
+  );
+  entityPositionEnsureWorld(mgr, parent);
+  mat4 invParent;
+  glm_mat4_inv(parent->worldTransform, invParent);
+  vec3 localPos;
+  glm_mat4_mulv3(invParent, position, 1.0f, localPos);
+  glm_vec3_copy(localPos, pos->position);
+  pos->flags = (pos->flags | ENTITY_POSITION_FLAG_POSITION_DIRTY)
+             & ~ENTITY_POSITION_FLAG_PRS_DIRTY;
+  entityPositionMarkDirty(mgr, pos);
+}
+
+void entityPositionSetLocalPosition(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 position
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+  glm_vec3_copy(position, pos->position);
+  pos->flags = (pos->flags | ENTITY_POSITION_FLAG_POSITION_DIRTY)
+             & ~ENTITY_POSITION_FLAG_PRS_DIRTY;
+  entityPositionMarkDirty(mgr, pos);
+}
+
+void entityPositionGetLocalRotation(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 dest
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+  entityPositionEnsurePRS(pos);
+  glm_vec3_copy(pos->rotation, dest);
+}
+
+void entityPositionGetWorldRotation(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 dest
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+  if(pos->parentEntityId == ENTITY_ID_INVALID) {
+    entityPositionEnsurePRS(pos);
+    glm_vec3_copy(pos->rotation, dest);
+    return;
+  }
+  entityPositionEnsureWorld(mgr, pos);
+  const float_t (*wt)[4] = pos->worldTransform;
+  const float_t sx = sqrtf(
+    wt[0][0]*wt[0][0] + wt[0][1]*wt[0][1] + wt[0][2]*wt[0][2]
+  );
+  const float_t sy = sqrtf(
+    wt[1][0]*wt[1][0] + wt[1][1]*wt[1][1] + wt[1][2]*wt[1][2]
+  );
+  const float_t sz = sqrtf(
+    wt[2][0]*wt[2][0] + wt[2][1]*wt[2][1] + wt[2][2]*wt[2][2]
+  );
+  const float_t r00 = sx > 0.0f ? wt[0][0]/sx : 0.0f;
+  const float_t r10 = sy > 0.0f ? wt[1][0]/sy : 0.0f;
+  const float_t r20 = sz > 0.0f ? wt[2][0]/sz : 0.0f;
+  const float_t r01 = sx > 0.0f ? wt[0][1]/sx : 0.0f;
+  const float_t r11 = sy > 0.0f ? wt[1][1]/sy : 0.0f;
+  const float_t r21 = sz > 0.0f ? wt[2][1]/sz : 0.0f;
+  const float_t r22 = sz > 0.0f ? wt[2][2]/sz : 0.0f;
+  const float_t sinBeta = glm_clamp(r20, -1.0f, 1.0f);
+  dest[1] = asinf(sinBeta);
+  const float_t cosBeta = cosf(dest[1]);
+  if(fabsf(cosBeta) > 1e-6f) {
+    dest[0] = atan2f(-r21, r22);
+    dest[2] = atan2f(-r10, r00);
+  } else {
+    dest[2] = 0.0f;
+    dest[0] = (sinBeta > 0.0f) ? atan2f(r01, r11) : -atan2f(r01, r11);
+  }
+}
+
+void entityPositionSetLocalRotation(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 rotation
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+  glm_vec3_copy(rotation, pos->rotation);
+  pos->flags = (pos->flags | ENTITY_POSITION_FLAG_ROTATION_DIRTY)
+             & ~ENTITY_POSITION_FLAG_PRS_DIRTY;
+  entityPositionMarkDirty(mgr, pos);
+}
+
+void entityPositionSetWorldRotation(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 rotation
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+  if(pos->parentEntityId == ENTITY_ID_INVALID) {
+    glm_vec3_copy(rotation, pos->rotation);
+    pos->flags = (pos->flags | ENTITY_POSITION_FLAG_ROTATION_DIRTY)
+               & ~ENTITY_POSITION_FLAG_PRS_DIRTY;
+    entityPositionMarkDirty(mgr, pos);
+    return;
+  }
+  entityposition_t *parent = componentGetData(
+    mgr, pos->parentEntityId, pos->parentComponentId, COMPONENT_TYPE_POSITION
+  );
+  entityPositionEnsureWorld(mgr, parent);
+
+  // Build target world rotation matrix (unit scale) from XYZ euler.
+  const float_t c0 = cosf(rotation[0]), s0 = sinf(rotation[0]);
+  const float_t c1 = cosf(rotation[1]), s1 = sinf(rotation[1]);
+  const float_t c2 = cosf(rotation[2]), s2 = sinf(rotation[2]);
+  const float_t s0s1 = s0*s1, c0s1 = c0*s1;
+  // Named wr[col_stored][row_stored] matching cglm column-major layout.
+  const float_t wr00 = c1*c2;
+  const float_t wr01 = c0*s2 + s0s1*c2;
+  const float_t wr02 = s0*s2 - c0s1*c2;
+  const float_t wr10 = -c1*s2;
+  const float_t wr11 = c0*c2 - s0s1*s2;
+  const float_t wr12 = s0*c2 + c0s1*s2;
+  const float_t wr20 = s1;
+  const float_t wr21 = -s0*c1;
+  const float_t wr22 = c0*c1;
+
+  // Normalize parent world columns to extract pure rotation.
+  const float_t (*pt)[4] = parent->worldTransform;
+  const float_t psx = sqrtf(
+    pt[0][0]*pt[0][0] + pt[0][1]*pt[0][1] + pt[0][2]*pt[0][2]
+  );
+  const float_t psy = sqrtf(
+    pt[1][0]*pt[1][0] + pt[1][1]*pt[1][1] + pt[1][2]*pt[1][2]
+  );
+  const float_t psz = sqrtf(
+    pt[2][0]*pt[2][0] + pt[2][1]*pt[2][1] + pt[2][2]*pt[2][2]
+  );
+  const float_t pr00 = psx > 0.f ? pt[0][0]/psx : 0.f;
+  const float_t pr01 = psx > 0.f ? pt[0][1]/psx : 0.f;
+  const float_t pr02 = psx > 0.f ? pt[0][2]/psx : 0.f;
+  const float_t pr10 = psy > 0.f ? pt[1][0]/psy : 0.f;
+  const float_t pr11 = psy > 0.f ? pt[1][1]/psy : 0.f;
+  const float_t pr12 = psy > 0.f ? pt[1][2]/psy : 0.f;
+  const float_t pr20 = psz > 0.f ? pt[2][0]/psz : 0.f;
+  const float_t pr21 = psz > 0.f ? pt[2][1]/psz : 0.f;
+  const float_t pr22 = psz > 0.f ? pt[2][2]/psz : 0.f;
+
+  // local_R = parent_R^T * world_R  (R^-1 == R^T for orthogonal matrices).
+  // Compute only the 7 entries of the local rotation matrix needed for XYZ
+  // euler extraction (stored column-major: [col][row] = math [row][col]).
+  // sinBeta  = stored[2][0] = math[0][2]
+  // r21/r22  = stored[2][1..2] = math[1..2][2]
+  // r10/r00  = stored[1][0], stored[0][0] = math[0][1], math[0][0]
+  // gimbal   = stored[0][1], stored[1][1] = math[1][0], math[1][1]
+  const float_t lr00  = pr00*wr00 + pr01*wr10 + pr02*wr20;  // math[0][0]
+  const float_t lr10  = pr00*wr01 + pr01*wr11 + pr02*wr21;  // math[0][1]
+  const float_t lr20  = pr00*wr02 + pr01*wr12 + pr02*wr22; // [0][2] -> sinBeta
+  const float_t lr01  = pr10*wr00 + pr11*wr10 + pr12*wr20;  // math[1][0]
+  const float_t lr11  = pr10*wr01 + pr11*wr11 + pr12*wr21;  // math[1][1]
+  const float_t lr21  = pr10*wr02 + pr11*wr12 + pr12*wr22; // [1][2] -> r21
+  const float_t lr22  = pr20*wr02 + pr21*wr12 + pr22*wr22; // [2][2] -> r22
+
+  const float_t sinBeta = glm_clamp(lr20, -1.0f, 1.0f);
+  pos->rotation[1] = asinf(sinBeta);
+  const float_t cosBeta = cosf(pos->rotation[1]);
+  if(fabsf(cosBeta) > 1e-6f) {
+    pos->rotation[0] = atan2f(-lr21, lr22);
+    pos->rotation[2] = atan2f(-lr10, lr00);
+  } else {
+    pos->rotation[2] = 0.0f;
+    pos->rotation[0] = (sinBeta > 0.0f)
+      ? atan2f(lr01, lr11) : -atan2f(lr01, lr11);
+  }
+  pos->flags = (pos->flags | ENTITY_POSITION_FLAG_ROTATION_DIRTY)
+             & ~ENTITY_POSITION_FLAG_PRS_DIRTY;
+  entityPositionMarkDirty(mgr, pos);
+}
+
+void entityPositionGetLocalScale(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 dest
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+  entityPositionEnsurePRS(pos);
+  glm_vec3_copy(pos->scale, dest);
+}
+
+void entityPositionGetWorldScale(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 dest
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+  if(pos->parentEntityId == ENTITY_ID_INVALID) {
+    entityPositionEnsurePRS(pos);
+    glm_vec3_copy(pos->scale, dest);
+    return;
+  }
+  entityPositionEnsureWorld(mgr, pos);
+  const float_t (*wt)[4] = pos->worldTransform;
+  dest[0] = sqrtf(wt[0][0]*wt[0][0] + wt[0][1]*wt[0][1] + wt[0][2]*wt[0][2]);
+  dest[1] = sqrtf(wt[1][0]*wt[1][0] + wt[1][1]*wt[1][1] + wt[1][2]*wt[1][2]);
+  dest[2] = sqrtf(wt[2][0]*wt[2][0] + wt[2][1]*wt[2][1] + wt[2][2]*wt[2][2]);
+}
+
+void entityPositionSetLocalScale(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 scale
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+  glm_vec3_copy(scale, pos->scale);
+  pos->flags = (pos->flags | ENTITY_POSITION_FLAG_ROTATION_DIRTY)
+             & ~ENTITY_POSITION_FLAG_PRS_DIRTY;
+  entityPositionMarkDirty(mgr, pos);
+}
+
+void entityPositionSetWorldScale(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 scale
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+  if(pos->parentEntityId == ENTITY_ID_INVALID) {
+    glm_vec3_copy(scale, pos->scale);
+    pos->flags = (pos->flags | ENTITY_POSITION_FLAG_ROTATION_DIRTY)
+               & ~ENTITY_POSITION_FLAG_PRS_DIRTY;
+    entityPositionMarkDirty(mgr, pos);
+    return;
+  }
+  entityposition_t *parent = componentGetData(
+    mgr, pos->parentEntityId, pos->parentComponentId, COMPONENT_TYPE_POSITION
+  );
+  entityPositionEnsureWorld(mgr, parent);
+  const float_t (*pt)[4] = parent->worldTransform;
+  const float_t psx = sqrtf(
+    pt[0][0]*pt[0][0] + pt[0][1]*pt[0][1] + pt[0][2]*pt[0][2]
+  );
+  const float_t psy = sqrtf(
+    pt[1][0]*pt[1][0] + pt[1][1]*pt[1][1] + pt[1][2]*pt[1][2]
+  );
+  const float_t psz = sqrtf(
+    pt[2][0]*pt[2][0] + pt[2][1]*pt[2][1] + pt[2][2]*pt[2][2]
+  );
+  pos->scale[0] = psx > 0.0f ? scale[0] / psx : scale[0];
+  pos->scale[1] = psy > 0.0f ? scale[1] / psy : scale[1];
+  pos->scale[2] = psz > 0.0f ? scale[2] / psz : scale[2];
+  pos->flags = (pos->flags | ENTITY_POSITION_FLAG_ROTATION_DIRTY)
+             & ~ENTITY_POSITION_FLAG_PRS_DIRTY;
+  entityPositionMarkDirty(mgr, pos);
+}
+
+void entityPositionSetParent(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const entityid_t parentEntityId,
+  const componentid_t parentComponentId
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+
+  // Remove from old parent's child list.
+  if(pos->parentEntityId != ENTITY_ID_INVALID) {
+    entityposition_t *oldParent = componentGetData(
+      mgr, pos->parentEntityId, pos->parentComponentId,
+      COMPONENT_TYPE_POSITION
+    );
+    for(uint8_t i = 0; i < oldParent->childCount; i++) {
+      if(
+        oldParent->childEntityIds[i] == entityId &&
+        oldParent->childComponentIds[i] == componentId
+      ) {
+        oldParent->childCount--;
+        for(uint8_t j = i; j < oldParent->childCount; j++) {
+          oldParent->childEntityIds[j]    = oldParent->childEntityIds[j + 1];
+          oldParent->childComponentIds[j] = oldParent->childComponentIds[j + 1];
+        }
+        break;
+      }
+    }
+  }
+
+  pos->parentEntityId    = parentEntityId;
+  pos->parentComponentId = parentComponentId;
+
+  // Register with new parent.
+  if(parentEntityId != ENTITY_ID_INVALID) {
+    entityposition_t *parent = componentGetData(
+      mgr, parentEntityId, parentComponentId, COMPONENT_TYPE_POSITION
+    );
+    if(parent->childCount < ENTITY_POSITION_CHILDREN_MAX) {
+      parent->childEntityIds[parent->childCount]    = entityId;
+      parent->childComponentIds[parent->childCount] = componentId;
+      parent->childCount++;
+    }
+  }
+
+  entityPositionMarkDirty(mgr, pos);
+}
+
+entityid_t entityPositionGetParent(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entityposition_t *pos = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+  return pos->parentEntityId;
+}
+
+entityposition_t *entityPositionGet(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  return componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_POSITION
+  );
+}
+
+void entityPositionRebuild(entitymanager_t *mgr, entityposition_t *pos) {
+  pos->flags = (
+    pos->flags |
+    ENTITY_POSITION_FLAG_ROTATION_DIRTY |
+    ENTITY_POSITION_FLAG_POSITION_DIRTY
+  ) & ~ENTITY_POSITION_FLAG_PRS_DIRTY;
+  entityPositionMarkDirty(mgr, pos);
+}
+
+void entityPositionMarkDirty(entitymanager_t *mgr, entityposition_t *pos) {
+  if(pos->flags & ENTITY_POSITION_FLAG_WORLD_DIRTY) return;
+  pos->flags |= ENTITY_POSITION_FLAG_WORLD_DIRTY;
+  for(uint8_t i = 0; i < pos->childCount; i++) {
+    entityposition_t *child = componentGetData(
+      mgr, pos->childEntityIds[i], pos->childComponentIds[i],
+      COMPONENT_TYPE_POSITION
+    );
+    entityPositionMarkDirty(mgr, child);
+  }
+}
+
+void entityPositionDisposeDeep(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entityposition_t *pos = entityPositionGet(mgr, entityId, componentId);
+
+  // Detach from parent so the parent's child list stays consistent.
+  if(pos->parentEntityId != ENTITY_ID_INVALID) {
+    entityPositionSetParent(
+      mgr, entityId, componentId, ENTITY_ID_INVALID, COMPONENT_ID_INVALID
+    );
+  }
+
+  // Copy the child list before disposing self (entityDispose invalidates
+  // pos).
+  uint8_t childCount = pos->childCount;
+  entityid_t childEntityIds[ENTITY_POSITION_CHILDREN_MAX];
+  componentid_t childComponentIds[ENTITY_POSITION_CHILDREN_MAX];
+  for(uint8_t i = 0; i < childCount; i++) {
+    childEntityIds[i]    = pos->childEntityIds[i];
+    childComponentIds[i] = pos->childComponentIds[i];
+    // Sever child's parent link so it won't try to modify our disposed
+    // data.
+    entityposition_t *child = entityPositionGet(
+      mgr, childEntityIds[i], childComponentIds[i]
+    );
+    child->parentEntityId    = ENTITY_ID_INVALID;
+    child->parentComponentId = COMPONENT_ID_INVALID;
+  }
+
+  entityDispose(mgr, entityId);
+
+  for(uint8_t i = 0; i < childCount; i++) {
+    entityPositionDisposeDeep(mgr, childEntityIds[i], childComponentIds[i]);
+  }
+}
+
+void entityPositionDecompose(entityposition_t *pos) {
+  // Translation: column 3
+  pos->position[0] = pos->localTransform[3][0];
+  pos->position[1] = pos->localTransform[3][1];
+  pos->position[2] = pos->localTransform[3][2];
+
+  // Scale: length of each basis column (xyz only)
+  pos->scale[0] = sqrtf(
+    pos->localTransform[0][0] * pos->localTransform[0][0] +
+    pos->localTransform[0][1] * pos->localTransform[0][1] +
+    pos->localTransform[0][2] * pos->localTransform[0][2]
+  );
+  pos->scale[1] = sqrtf(
+    pos->localTransform[1][0] * pos->localTransform[1][0] +
+    pos->localTransform[1][1] * pos->localTransform[1][1] +
+    pos->localTransform[1][2] * pos->localTransform[1][2]
+  );
+  pos->scale[2] = sqrtf(
+    pos->localTransform[2][0] * pos->localTransform[2][0] +
+    pos->localTransform[2][1] * pos->localTransform[2][1] +
+    pos->localTransform[2][2] * pos->localTransform[2][2]
+  );
+
+  // Normalize columns to isolate the rotation matrix (no mat4 needed).
+  const float_t invS0 = pos->scale[0] > 0.0f ? 1.0f / pos->scale[0] : 0.0f;
+  const float_t invS1 = pos->scale[1] > 0.0f ? 1.0f / pos->scale[1] : 0.0f;
+  const float_t invS2 = pos->scale[2] > 0.0f ? 1.0f / pos->scale[2] : 0.0f;
+
+  const float_t r00 = pos->localTransform[0][0] * invS0;
+  const float_t r01 = pos->localTransform[0][1] * invS0;
+  const float_t r02 = pos->localTransform[0][2] * invS0;
+  const float_t r10 = pos->localTransform[1][0] * invS1;
+  const float_t r11 = pos->localTransform[1][1] * invS1;
+  const float_t r20 = pos->localTransform[2][0] * invS2;
+  const float_t r21 = pos->localTransform[2][1] * invS2;
+  const float_t r22 = pos->localTransform[2][2] * invS2;
+
+  // Extract XYZ euler angles (R = Rx * Ry * Rz, column-major)
+  const float_t sinBeta = glm_clamp(r20, -1.0f, 1.0f);
+  pos->rotation[1] = asinf(sinBeta);
+  const float_t cosBeta = cosf(pos->rotation[1]);
+
+  if(fabsf(cosBeta) > 1e-6f) {
+    pos->rotation[0] = atan2f(-r21, r22);
+    pos->rotation[2] = atan2f(-r10, r00);
+  } else {
+    // Gimbal lock: pin Z to 0, recover X.
+    pos->rotation[2] = 0.0f;
+    pos->rotation[0] = (sinBeta > 0.0f)
+      ? atan2f(r01, r11)
+      : -atan2f(r01, r11);
+  }
+}
+
+void entityPositionEnsurePRS(entityposition_t *pos) {
+  if(!(pos->flags & ENTITY_POSITION_FLAG_PRS_DIRTY)) return;
+  entityPositionDecompose(pos);
+  pos->flags &= ~ENTITY_POSITION_FLAG_PRS_DIRTY;
+}
+
+void entityPositionEnsureLocal(entityposition_t *pos) {
+  const uint8_t dirty = pos->flags & (
+    ENTITY_POSITION_FLAG_ROTATION_DIRTY | ENTITY_POSITION_FLAG_POSITION_DIRTY
+  );
+  if(!dirty) return;
+
+  if(dirty & ENTITY_POSITION_FLAG_ROTATION_DIRTY) {
+    // Rotation or scale changed: rebuild cols 0-2 analytically (XYZ euler).
+    const float_t c0 = cosf(pos->rotation[0]), s0 = sinf(pos->rotation[0]);
+    const float_t c1 = cosf(pos->rotation[1]), s1 = sinf(pos->rotation[1]);
+    const float_t c2 = cosf(pos->rotation[2]), s2 = sinf(pos->rotation[2]);
+    const float_t s0s1 = s0 * s1;
+    const float_t c0s1 = c0 * s1;
+
+    pos->localTransform[0][0] =  c1 * c2                  * pos->scale[0];
+    pos->localTransform[0][1] = (c0 * s2 + s0s1 * c2)     * pos->scale[0];
+    pos->localTransform[0][2] = (s0 * s2 - c0s1 * c2)     * pos->scale[0];
+    pos->localTransform[0][3] = 0.0f;
+
+    pos->localTransform[1][0] = -c1 * s2                  * pos->scale[1];
+    pos->localTransform[1][1] = (c0 * c2 - s0s1 * s2)     * pos->scale[1];
+    pos->localTransform[1][2] = (s0 * c2 + c0s1 * s2)     * pos->scale[1];
+    pos->localTransform[1][3] = 0.0f;
+
+    pos->localTransform[2][0] =  s1                        * pos->scale[2];
+    pos->localTransform[2][1] = -s0 * c1                   * pos->scale[2];
+    pos->localTransform[2][2] =  c0 * c1                   * pos->scale[2];
+    pos->localTransform[2][3] = 0.0f;
+  }
+
+  if(dirty & ENTITY_POSITION_FLAG_POSITION_DIRTY) {
+    // Only position changed: update column 3 only (no trig needed).
+    pos->localTransform[3][0] = pos->position[0];
+    pos->localTransform[3][1] = pos->position[1];
+    pos->localTransform[3][2] = pos->position[2];
+    pos->localTransform[3][3] = 1.0f;
+  }
+
+  pos->flags &= ~(
+    ENTITY_POSITION_FLAG_ROTATION_DIRTY | ENTITY_POSITION_FLAG_POSITION_DIRTY
+  );
+}
+
+void entityPositionEnsureWorld(entitymanager_t *mgr, entityposition_t *pos) {
+  if(!(pos->flags & ENTITY_POSITION_FLAG_WORLD_DIRTY)) return;
+  entityPositionEnsureLocal(pos);
+
+  if(pos->parentEntityId != ENTITY_ID_INVALID) {
+    // Parented: world = parent.world x local. worldTransform must be
+    // written because children (and this node's getters) read it.
+    entityposition_t *parent = componentGetData(
+      mgr, pos->parentEntityId, pos->parentComponentId,
+      COMPONENT_TYPE_POSITION
+    );
+    entityPositionEnsureWorld(mgr, parent);
+    glm_mat4_mul(
+      parent->worldTransform, pos->localTransform, pos->worldTransform
+    );
+  } else if(pos->childCount > 0) {
+    // Parentless root with children: children need a valid worldTransform
+    // to multiply against, but world == local, so just copy.
+    glm_mat4_copy(pos->localTransform, pos->worldTransform);
+  }
+  // Parentless leaf: world == local. Getters read localTransform directly;
+  // no copy needed.
+
+  pos->flags &= ~ENTITY_POSITION_FLAG_WORLD_DIRTY;
+}

src/dusk/entity/component/display/entityposition.h

@@ -0,0 +1,460 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "entity/entitybase.h"
+#include "error/error.h"
+
+/** Maximum number of child position components this node can track. */
+#define ENTITY_POSITION_CHILDREN_MAX 8
+
+/**
+ * PRS cache is stale. localTransform was written directly (e.g. lookAt) and
+ * position/rotation/scale need to be decomposed before they can be read.
+ */
+#define ENTITY_POSITION_FLAG_PRS_DIRTY   (1 << 0)
+
+/**
+ * Columns 0-2 of localTransform are stale. Rotation or scale changed; the
+ * basis vectors need to be rebuilt analytically before the matrix can be used.
+ * Does not imply column 3 (translation) is stale.
+ */
+#define ENTITY_POSITION_FLAG_ROTATION_DIRTY (1 << 1)
+
+/**
+ * Column 3 of localTransform is stale. Position changed; only the
+ * translation column needs to be written. Does not imply columns 0-2 are
+ * stale.
+ */
+#define ENTITY_POSITION_FLAG_POSITION_DIRTY (1 << 2)
+
+/**
+ * worldTransform is stale. Either the local matrix changed or an ancestor
+ * moved; worldTransform must be recomputed before world data can be read.
+ */
+#define ENTITY_POSITION_FLAG_WORLD_DIRTY (1 << 3)
+
+typedef struct {
+  /*
+   * Hot fields - flag checks, parent/child traversal (markDirty, ensureWorld)
+   * only touch these. Kept at the front so they share the first cache line.
+   */
+
+  /** ENTITY_POSITION_FLAG_* bitmask; describes which caches are stale. */
+  uint8_t flags;
+  /** Entity ID of the parent node, or ENTITY_ID_INVALID if none. */
+  entityid_t parentEntityId;
+  /** Component ID of the parent position, or COMPONENT_ID_INVALID if none. */
+  componentid_t parentComponentId;
+  /** Number of currently registered children. */
+  uint8_t childCount;
+  /** Entity IDs of child nodes. */
+  entityid_t childEntityIds[ENTITY_POSITION_CHILDREN_MAX];
+  /** Component IDs of child position components. */
+  componentid_t childComponentIds[ENTITY_POSITION_CHILDREN_MAX];
+
+  /*
+   * Warm fields - read/written by PRS getters/setters.
+   * Accessed more often than the matrices but less often than flags.
+   */
+
+  /** Cached local position (XYZ). Stale when PRS_DIRTY is set. */
+  vec3 position;
+  /** Cached local rotation (XYZ euler, radians). Stale when PRS_DIRTY. */
+  vec3 rotation;
+  /** Cached local scale (XYZ). Stale when PRS_DIRTY is set. */
+  vec3 scale;
+
+  /*
+   * Cold fields - only touched when actually rebuilding transforms.
+   */
+
+  /** Local transform matrix, rebuilt lazily from position/rotation/scale. */
+  mat4 localTransform;
+  /** World transform matrix, recomputed lazily from the parent chain. */
+  mat4 worldTransform;
+} entityposition_t;
+
+/**
+ * Initializes the entity position component, setting identity transforms and
+ * zeroing all parent/child state.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ */
+void entityPositionInit(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Positions and orients the entity at eye, facing target. Stores this as
+ * the entity's normal world-space placement (consistent with every other
+ * setter), not as a view matrix -- invert entityPositionGetTransform()'s
+ * result to get a view matrix for rendering.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param eye The eye/camera position.
+ * @param target The target point to look at.
+ * @param up The up vector.
+ */
+void entityPositionLookAt(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 eye,
+  vec3 target,
+  vec3 up
+);
+
+/**
+ * Gets the world-space transform matrix, recomputing it lazily if dirty.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param dest Destination matrix.
+ */
+void entityPositionGetTransform(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  mat4 dest
+);
+
+/**
+ * Gets the local transform matrix (does not include parent transforms).
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param dest Destination matrix.
+ */
+void entityPositionGetLocalTransform(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  mat4 dest
+);
+
+/**
+ * Gets the cached local position (XYZ). Decomposes localTransform into PRS
+ * first if ENTITY_POSITION_FLAG_PRS_DIRTY is set; never triggers a matrix
+ * rebuild or world-transform update.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param dest Destination vector.
+ */
+void entityPositionGetLocalPosition(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 dest
+);
+
+/**
+ * Gets the world-space position. For parentless entities this is the same as
+ * the local position.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param dest Destination vector.
+ */
+void entityPositionGetWorldPosition(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 dest
+);
+
+/**
+ * Sets the world-space position. For parentless entities this is equivalent
+ * to entityPositionSetLocalPosition. For parented entities the position is
+ * converted to local space via the inverted parent world transform.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param position The desired world-space position.
+ */
+void entityPositionSetWorldPosition(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 position
+);
+
+/**
+ * Sets the local position, marks localTransform and worldTransform (self +
+ * descendants) dirty.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param position The new local position.
+ */
+void entityPositionSetLocalPosition(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 position
+);
+
+/**
+ * Gets the cached local euler rotation (XYZ, radians). Decomposes
+ * localTransform first if ENTITY_POSITION_FLAG_PRS_DIRTY is set.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param dest Destination vector.
+ */
+void entityPositionGetLocalRotation(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 dest
+);
+
+/**
+ * Gets the world-space euler rotation (XYZ, radians) by decomposing the
+ * world transform. For parentless entities this is the same as local
+ * rotation.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param dest Destination vector.
+ */
+void entityPositionGetWorldRotation(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 dest
+);
+
+/**
+ * Sets the local euler rotation (XYZ, radians) and marks transforms dirty.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param rotation The new local rotation.
+ */
+void entityPositionSetLocalRotation(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 rotation
+);
+
+/**
+ * Sets the world-space euler rotation (XYZ, radians). For parentless
+ * entities this is equivalent to entityPositionSetLocalRotation. For
+ * parented entities the rotation is converted to local space by removing
+ * the parent world rotation.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param rotation The desired world-space euler rotation.
+ */
+void entityPositionSetWorldRotation(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 rotation
+);
+
+/**
+ * Gets the cached local scale. Decomposes localTransform first if
+ * ENTITY_POSITION_FLAG_PRS_DIRTY is set.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param dest Destination vector.
+ */
+void entityPositionGetLocalScale(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 dest
+);
+
+/**
+ * Gets the world-space scale by extracting column lengths from the world
+ * transform. For parentless entities this is the same as local scale.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param dest Destination vector.
+ */
+void entityPositionGetWorldScale(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 dest
+);
+
+/**
+ * Sets the local scale and marks transforms dirty.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param scale The new local scale.
+ */
+void entityPositionSetLocalScale(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 scale
+);
+
+/**
+ * Sets the world-space scale. For parentless entities this is equivalent to
+ * entityPositionSetLocalScale. For parented entities the scale is converted
+ * to local space by dividing by the parent world scale (assumes no shear).
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param scale The desired world-space scale.
+ */
+void entityPositionSetWorldScale(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 scale
+);
+
+/**
+ * Sets the parent of this entity's position component.
+ * Pass ENTITY_ID_INVALID / COMPONENT_ID_INVALID to detach from any parent.
+ *
+ * @param mgr The entity manager that owns both entities.
+ * @param entityId The child entity ID.
+ * @param componentId The child component ID.
+ * @param parentEntityId The parent entity ID.
+ * @param parentComponentId The parent component ID.
+ */
+void entityPositionSetParent(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const entityid_t parentEntityId,
+  const componentid_t parentComponentId
+);
+
+/**
+ * Gets the entity ID of this position component's parent.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return The parent entity ID, or ENTITY_ID_INVALID if unparented.
+ */
+entityid_t entityPositionGetParent(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Returns a direct pointer to the entity position component data.
+ * After modifying localTransform directly, call entityPositionMarkDirty() to
+ * set ENTITY_POSITION_FLAG_WORLD_DIRTY on self and descendants. After
+ * modifying PRS directly, call entityPositionRebuild() instead.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return Pointer to the component data.
+ */
+entityposition_t *entityPositionGet(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Signals that the PRS cache was modified externally. Sets both
+ * ENTITY_POSITION_FLAG_ROTATION_DIRTY and ENTITY_POSITION_FLAG_POSITION_DIRTY
+ * so all of localTransform is rebuilt lazily on the next read, clears
+ * ENTITY_POSITION_FLAG_PRS_DIRTY, propagates ENTITY_POSITION_FLAG_WORLD_DIRTY
+ * to self and all descendants.
+ *
+ * @param mgr The entity manager that owns pos and its descendants.
+ * @param pos The position component whose PRS was modified.
+ */
+void entityPositionRebuild(entitymanager_t *mgr, entityposition_t *pos);
+
+/**
+ * Sets ENTITY_POSITION_FLAG_WORLD_DIRTY on this node and all descendants,
+ * indicating that worldTransform must be recomputed before it is read.
+ * Call this after modifying localTransform directly.
+ *
+ * @param mgr The entity manager that owns pos and its descendants.
+ * @param pos The position component to mark dirty.
+ */
+void entityPositionMarkDirty(entitymanager_t *mgr, entityposition_t *pos);
+
+/**
+ * Disposes this entity and all of its position-component descendants
+ * recursively. Detaches from any parent before destroying.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The root entity ID.
+ * @param componentId The root position component ID.
+ */
+void entityPositionDisposeDeep(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Decomposes the local transform matrix back into the position, rotation
+ * (XYZ euler, radians), and scale cache fields.
+ *
+ * @param pos The position component to decompose.
+ */
+void entityPositionDecompose(entityposition_t *pos);
+
+/**
+ * Internal. Decomposes localTransform into the PRS cache if
+ * ENTITY_POSITION_FLAG_PRS_DIRTY is set.
+ *
+ * @param pos The position component to update.
+ */
+void entityPositionEnsurePRS(entityposition_t *pos);
+
+/**
+ * Internal. Rebuilds localTransform from the PRS cache, touching only the
+ * columns flagged as stale (ROTATION_DIRTY and/or POSITION_DIRTY).
+ *
+ * @param pos The position component to update.
+ */
+void entityPositionEnsureLocal(entityposition_t *pos);
+
+/**
+ * Internal. Recomputes worldTransform from the parent chain if
+ * ENTITY_POSITION_FLAG_WORLD_DIRTY is set.
+ *
+ * @param mgr The entity manager that owns pos and its ancestors.
+ * @param pos The position component to update.
+ */
+void entityPositionEnsureWorld(entitymanager_t *mgr, entityposition_t *pos);

src/dusk/entity/component/display/entityrenderable.c

@@ -0,0 +1,192 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "entityrenderable.h"
+#include "entity/entitymanager.h"
+#include "display/shader/shadermaterial.h"
+#include "display/shader/shaderunlit.h"
+#include "display/display.h"
+#include "display/mesh/cube.h"
+#include "util/memory.h"
+#include "assert/assert.h"
+
+void entityRenderableInit(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entityrenderable_t *r = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_RENDERABLE
+  );
+  memoryZero(r, sizeof(entityrenderable_t));
+  r->type = ENTITY_RENDERABLE_TYPE_SHADER_MATERIAL;
+  r->data.material.shaderType = SHADER_LIST_SHADER_UNLIT;
+  r->data.material.material.unlit.color = COLOR_WHITE;
+  r->data.material.meshes[0] = &CUBE_MESH_SIMPLE;
+  r->data.material.meshOffsets[0] = 0;
+  r->data.material.meshCounts[0] = -1;
+  r->data.material.meshCount = 1;
+  r->data.material.state.flags = DISPLAY_STATE_FLAG_DEPTH_TEST;
+}
+
+void entityRenderableDispose(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+}
+
+void entityRenderableSetType(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const entityrenderabletype_t type
+) {
+  entityrenderable_t *r = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_RENDERABLE
+  );
+  r->type = type;
+}
+
+void entityRenderableSetPriority(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const int8_t priority
+) {
+  entityrenderable_t *r = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_RENDERABLE
+  );
+  r->priority = priority;
+}
+
+void entityRenderableSetColor(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const color_t color
+) {
+  entityrenderable_t *r = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_RENDERABLE
+  );
+  assertTrue(
+    r->type == ENTITY_RENDERABLE_TYPE_SHADER_MATERIAL,
+    "Renderable must be ENTITY_RENDERABLE_TYPE_SHADER_MATERIAL to set color"
+  );
+  r->data.material.material.unlit.color = color;
+}
+
+void entityRenderableSetMesh(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const uint8_t slot,
+  mesh_t *mesh
+) {
+  assertNotNull(mesh, "Mesh cannot be null");
+  assertTrue(slot < ENTITY_RENDERABLE_MESHES_MAX, "Mesh slot out of bounds");
+
+  entityrenderable_t *r = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_RENDERABLE
+  );
+  assertTrue(
+    r->type == ENTITY_RENDERABLE_TYPE_SHADER_MATERIAL,
+    "Renderable must be ENTITY_RENDERABLE_TYPE_SHADER_MATERIAL to set a mesh"
+  );
+
+  r->data.material.meshes[slot] = mesh;
+  r->data.material.meshOffsets[slot] = 0;
+  r->data.material.meshCounts[slot] = -1;
+  if(slot >= r->data.material.meshCount) {
+    r->data.material.meshCount = slot + 1;
+  }
+}
+
+void entityRenderableSetDraw(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  errorret_t (*draw)(
+    entitymanager_t *mgr,
+    const entityid_t entityId,
+    const componentid_t componentId,
+    void *user
+  ),
+  void *user
+) {
+  assertNotNull(draw, "Draw callback cannot be null");
+  entityrenderable_t *r = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_RENDERABLE
+  );
+  r->type = ENTITY_RENDERABLE_TYPE_CUSTOM;
+  r->data.custom.draw = draw;
+  r->data.custom.drawUser = user;
+}
+
+errorret_t entityRenderableDraw(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entityrenderable_t *r = componentGetData(
+    mgr, entityId, componentId, COMPONENT_TYPE_RENDERABLE
+  );
+  switch(r->type) {
+    case ENTITY_RENDERABLE_TYPE_SPRITEBATCH:
+      return entityRenderableDrawSpritebatch(&r->data.spritebatch);
+    case ENTITY_RENDERABLE_TYPE_SHADER_MATERIAL:
+      return entityRenderableDrawMaterial(&r->data.material);
+    case ENTITY_RENDERABLE_TYPE_CUSTOM:
+      return entityRenderableDrawCustom(
+        mgr, entityId, componentId, &r->data.custom
+      );
+    default:
+      assertUnreachable("Invalid renderable type");
+  }
+}
+
+errorret_t entityRenderableDrawSpritebatch(
+  const entityrenderablespritebatch_t *sb
+) {
+  if(sb->spriteCount == 0) errorOk();
+
+  errorChain(displaySetState((displaystate_t){
+    .flags = DISPLAY_STATE_FLAG_BLEND
+  }));
+
+  spriteBatchClear();
+  shadermaterial_t mat;
+  memoryZero(&mat, sizeof(shadermaterial_t));
+  mat.unlit.texture = sb->texture;
+  mat.unlit.color = COLOR_WHITE;
+  errorChain(spriteBatchBuffer(
+    sb->sprites, sb->spriteCount,
+    SHADER_LIST_DEFS[SHADER_LIST_SHADER_UNLIT].shader, mat
+  ));
+  return spriteBatchFlush();
+}
+
+errorret_t entityRenderableDrawMaterial(const entityrenderablematerial_t *m) {
+  errorChain(displaySetState(m->state));
+  shader_t *shader = SHADER_LIST_DEFS[m->shaderType].shader;
+  assertNotNull(shader, "Shader cannot be null for material type");
+  errorChain(shaderBind(shader));
+  errorChain(shaderSetMaterial(shader, &m->material));
+  for(uint8_t i = 0; i < m->meshCount; i++) {
+    errorChain(meshDraw(m->meshes[i], m->meshOffsets[i], m->meshCounts[i]));
+  }
+  errorOk();
+}
+
+errorret_t entityRenderableDrawCustom(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const entityrenderablecustom_t *custom
+) {
+  return custom->draw(mgr, entityId, componentId, custom->drawUser);
+}

src/dusk/entity/component/display/entityrenderable.h

@@ -0,0 +1,234 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "entity/entitybase.h"
+#include "display/mesh/mesh.h"
+#include "display/shader/shadermaterial.h"
+#include "display/spritebatch/spritebatch.h"
+#include "display/displaystate.h"
+#include "error/error.h"
+
+#define ENTITY_RENDERABLE_SPRITEBATCH_SPRITES_MAX 64
+#define ENTITY_RENDERABLE_MESHES_MAX 8
+
+typedef enum {
+  ENTITY_RENDERABLE_TYPE_CUSTOM = 0,
+  ENTITY_RENDERABLE_TYPE_SPRITEBATCH,
+  ENTITY_RENDERABLE_TYPE_SHADER_MATERIAL,
+} entityrenderabletype_t;
+
+typedef struct {
+  spritebatchsprite_t sprites[ENTITY_RENDERABLE_SPRITEBATCH_SPRITES_MAX];
+  uint32_t spriteCount;
+  texture_t *texture;
+} entityrenderablespritebatch_t;
+
+typedef struct {
+  mesh_t *meshes[ENTITY_RENDERABLE_MESHES_MAX];
+  int32_t meshOffsets[ENTITY_RENDERABLE_MESHES_MAX];
+  int32_t meshCounts[ENTITY_RENDERABLE_MESHES_MAX];
+  uint8_t meshCount;
+  shaderlistshader_t shaderType;
+  shadermaterial_t material;
+  displaystate_t state;
+} entityrenderablematerial_t;
+
+typedef struct {
+  errorret_t (*draw)(
+    entitymanager_t *mgr,
+    const entityid_t entityId,
+    const componentid_t componentId,
+    void *user
+  );
+  void *drawUser;
+} entityrenderablecustom_t;
+
+typedef union entityrenderabledata_u {
+  entityrenderablespritebatch_t spritebatch;
+  entityrenderablematerial_t material;
+  entityrenderablecustom_t custom;
+} entityrenderabledata_t;
+
+typedef struct {
+  entityrenderabletype_t type;
+  entityrenderabledata_t data;
+
+  /**
+   * Render priority. 0 = auto (derived from type/flags). Higher values
+   * render later (on top of lower values). Range: [-128..127] with 0 auto.
+   */
+  int8_t priority;
+} entityrenderable_t;
+
+/**
+ * Initializes the entity renderable component. Defaults to
+ * ENTITY_RENDERABLE_TYPE_SHADER_MATERIAL with the unlit shader, a white
+ * cube, and depth-test enabled.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity to initialize the component for.
+ * @param componentId The renderable component of the entity.
+ */
+void entityRenderableInit(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Disposes the entity renderable component.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity to dispose the component for.
+ * @param componentId The renderable component of the entity.
+ */
+void entityRenderableDispose(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Sets the rendering type for the renderable component. Resets
+ * type-specific data to zero.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity to configure.
+ * @param componentId The renderable component.
+ * @param type The rendering type to use.
+ */
+void entityRenderableSetType(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const entityrenderabletype_t type
+);
+
+/**
+ * Sets the render priority. 0 = auto (derived from type/flags). Higher
+ * values render later (on top). Use non-zero to force ordering.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity to configure.
+ * @param componentId The renderable component.
+ * @param priority The priority value, or 0 for auto.
+ */
+void entityRenderableSetPriority(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const int8_t priority
+);
+
+/**
+ * Sets the unlit material color. Only meaningful when the renderable is
+ * (or defaults to) ENTITY_RENDERABLE_TYPE_SHADER_MATERIAL -- asserts
+ * otherwise.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity to configure.
+ * @param componentId The renderable component.
+ * @param color The color to tint the material with.
+ */
+void entityRenderableSetColor(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const color_t color
+);
+
+/**
+ * Sets one of the material renderable's meshes, drawn in full (no offset/
+ * count override). Only meaningful when the renderable is (or defaults
+ * to) ENTITY_RENDERABLE_TYPE_SHADER_MATERIAL -- asserts otherwise.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity to configure.
+ * @param componentId The renderable component.
+ * @param slot Index into the material's meshes array (0 to
+ * ENTITY_RENDERABLE_MESHES_MAX - 1).
+ * @param mesh The mesh to draw in that slot.
+ */
+void entityRenderableSetMesh(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const uint8_t slot,
+  mesh_t *mesh
+);
+
+/**
+ * Sets the draw callback, switching the type to
+ * ENTITY_RENDERABLE_TYPE_CUSTOM.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity to configure.
+ * @param componentId The renderable component of the entity.
+ * @param draw The draw callback to assign.
+ * @param user Userdata passed to the callback.
+ */
+void entityRenderableSetDraw(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  errorret_t (*draw)(
+    entitymanager_t *mgr,
+    const entityid_t entityId,
+    const componentid_t componentId,
+    void *user
+  ),
+  void *user
+);
+
+/**
+ * Draws the entity using its renderable component data.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity to draw.
+ * @param componentId The renderable component of the entity.
+ * @return Any error state that happened.
+ */
+errorret_t entityRenderableDraw(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Internal. Draws a spritebatch-type renderable.
+ *
+ * @param sb The spritebatch data to draw.
+ * @return Error state.
+ */
+errorret_t entityRenderableDrawSpritebatch(
+  const entityrenderablespritebatch_t *sb
+);
+
+/**
+ * Internal. Draws a shader-material-type renderable.
+ *
+ * @param m The material data to draw.
+ * @return Error state.
+ */
+errorret_t entityRenderableDrawMaterial(const entityrenderablematerial_t *m);
+
+/**
+ * Internal. Invokes a custom-type renderable's draw callback.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity being drawn.
+ * @param componentId The renderable component of the entity.
+ * @param custom The custom draw data.
+ * @return Error state.
+ */
+errorret_t entityRenderableDrawCustom(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const entityrenderablecustom_t *custom
+);

src/dusk/entity/component/physics/CMakeLists.txt

@@ -6,5 +6,5 @@
 # Sources
 target_sources(${DUSK_LIBRARY_TARGET_NAME}
   PUBLIC
-    log.c
+    entityphysics.c
 )

src/dusk/entity/component/physics/entityphysics.c

@@ -0,0 +1,135 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "entityphysics.h"
+#include "entity/entitymanager.h"
+#include "util/memory.h"
+
+void entityPhysicsInit(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entityphysics_t *phys = entityPhysicsGet(mgr, entityId, componentId);
+
+  memoryZero(phys, sizeof(entityphysics_t));
+
+  // Default to cube
+  phys->type = PHYSICS_BODY_DYNAMIC;
+  phys->shape.type = PHYSICS_SHAPE_CUBE;
+  phys->shape.data.cube.halfExtents[0] = 0.5f;
+  phys->shape.data.cube.halfExtents[1] = 0.5f;
+  phys->shape.data.cube.halfExtents[2] = 0.5f;
+  phys->gravityScale = 1.0f;
+  phys->onGround = false;
+  phys->collideMask = 0x1;
+}
+
+entityphysics_t *entityPhysicsGet(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  return componentGetData(mgr, entityId, componentId, COMPONENT_TYPE_PHYSICS);
+}
+
+void entityPhysicsSetShape(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const physicsshape_t shape
+) {
+  entityphysics_t *phys = entityPhysicsGet(mgr, entityId, componentId);
+  phys->shape = shape;
+}
+
+physicsshape_t entityPhysicsGetShape(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entityphysics_t *phys = entityPhysicsGet(mgr, entityId, componentId);
+  return phys->shape;
+}
+
+void entityPhysicsGetVelocity(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 dest
+) {
+  entityphysics_t *phys = entityPhysicsGet(mgr, entityId, componentId);
+  glm_vec3_copy(phys->velocity, dest);
+}
+
+void entityPhysicsSetVelocity(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 velocity
+) {
+  entityphysics_t *phys = entityPhysicsGet(mgr, entityId, componentId);
+  glm_vec3_copy(velocity, phys->velocity);
+}
+
+void entityPhysicsApplyImpulse(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 impulse
+) {
+  entityphysics_t *phys = entityPhysicsGet(mgr, entityId, componentId);
+  if(phys->type == PHYSICS_BODY_STATIC) return;
+  glm_vec3_add(phys->velocity, impulse, phys->velocity);
+}
+
+bool_t entityPhysicsIsOnGround(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entityphysics_t *phys = entityPhysicsGet(mgr, entityId, componentId);
+  return phys->onGround;
+}
+
+void entityPhysicsSetBodyType(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const physicsbodytype_t type
+) {
+  entityphysics_t *phys = entityPhysicsGet(mgr, entityId, componentId);
+  phys->type = type;
+}
+
+physicsbodytype_t entityPhysicsGetBodyType(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entityphysics_t *phys = entityPhysicsGet(mgr, entityId, componentId);
+  return phys->type;
+}
+
+void entityPhysicsSetCollideMask(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const uint32_t mask
+) {
+  entityphysics_t *phys = entityPhysicsGet(mgr, entityId, componentId);
+  phys->collideMask = mask;
+}
+
+uint32_t entityPhysicsGetCollideMask(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entityphysics_t *phys = entityPhysicsGet(mgr, entityId, componentId);
+  return phys->collideMask;
+}

src/dusk/entity/component/physics/entityphysics.h

@@ -0,0 +1,211 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "entity/entitybase.h"
+#include "physics/physicsshape.h"
+#include "physics/physicsbodytype.h"
+#include "error/error.h"
+
+typedef struct {
+  physicsbodytype_t type;
+  physicsshape_t shape;
+  vec3 velocity;
+  float_t gravityScale;
+  bool_t onGround;
+
+  /**
+   * Bitmask of collision layers/categories this body belongs to. Two
+   * bodies only collide with each other if (a.collideMask & b.collideMask)
+   * is non-zero -- i.e. they share at least one set bit. Defaults to 0x1
+   * (only bit 0 set).
+   */
+  uint32_t collideMask;
+} entityphysics_t;
+
+/**
+ * Initializes the physics component: defaults to a dynamic 1x1x1 cube
+ * body, zero velocity, unit gravity scale, and onGround false.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ */
+void entityPhysicsInit(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Gets the underlying physics structure (temporarily) for the given entity.
+ * This is really just intended for doing operations faster than using the
+ * getters and setters, but it is preferred that you use those.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return The physics component data for the given entity and component ID.
+ */
+entityphysics_t *entityPhysicsGet(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Sets the shape of the entity's physics body. This will not reset the body
+ * state, so if you change from a cube to a sphere, it will keep the same
+ * velocity and onGround state.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param shape The new shape to set on the physics body.
+ */
+void entityPhysicsSetShape(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const physicsshape_t shape
+);
+
+/**
+ * Gets the shape of the entity's physics body.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return The shape of the physics body.
+ */
+physicsshape_t entityPhysicsGetShape(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Gets the velocity of the entity's physics body.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param dest The destination vec3 to write the velocity to.
+ */
+void entityPhysicsGetVelocity(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 dest
+);
+
+/**
+ * Sets the velocity of the entity's physics body. This is not an impulse, so
+ * it will be affected by mass and drag.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param velocity The new velocity to set on the physics body.
+ */
+void entityPhysicsSetVelocity(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 velocity
+);
+
+/**
+ * Applies an impulse to the entity's physics body. This is an immediate
+ * velocity change that is not affected by mass or drag. No-op on STATIC
+ * bodies.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param impulse The impulse to apply to the physics body.
+ */
+void entityPhysicsApplyImpulse(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  vec3 impulse
+);
+
+/**
+ * Returns true if the entity's physics body rested on a surface during the
+ * last physicsWorldStep.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return True if the body is on the ground, false otherwise.
+ */
+bool_t entityPhysicsIsOnGround(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Sets the body type of the entity's physics body.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param type The body type to set.
+ */
+void entityPhysicsSetBodyType(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const physicsbodytype_t type
+);
+
+/**
+ * Gets the body type of the entity's physics body.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return The body type of the physics body.
+ */
+physicsbodytype_t entityPhysicsGetBodyType(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Sets the collision mask of the entity's physics body. Two bodies only
+ * collide if their masks share at least one set bit.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param mask The new collision mask to set on the physics body.
+ */
+void entityPhysicsSetCollideMask(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const uint32_t mask
+);
+
+/**
+ * Gets the collision mask of the entity's physics body.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return The collision mask of the physics body.
+ */
+uint32_t entityPhysicsGetCollideMask(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);

src/dusk/entity/component/trigger/CMakeLists.txt

@@ -6,7 +6,6 @@
 # Sources
 target_sources(${DUSK_LIBRARY_TARGET_NAME}
   PUBLIC
-    battle.c
+    entitytrigger.c
-    battlefighter.c
+    entitytriggerevents.c
-    party.c
 )

src/dusk/entity/component/trigger/entitytrigger.c

@@ -0,0 +1,105 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "entitytrigger.h"
+#include "entity/entitymanager.h"
+#include "util/memory.h"
+
+void entityTriggerInit(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entitytrigger_t *trig = entityTriggerGet(mgr, entityId, componentId);
+
+  memoryZero(trig, sizeof(entitytrigger_t));
+
+  trig->shape.type = PHYSICS_SHAPE_CUBE;
+  trig->shape.data.cube.halfExtents[0] = 0.5f;
+  trig->shape.data.cube.halfExtents[1] = 0.5f;
+  trig->shape.data.cube.halfExtents[2] = 0.5f;
+  trig->collideMask = 0x1;
+}
+
+entitytrigger_t *entityTriggerGet(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  return componentGetData(mgr, entityId, componentId, COMPONENT_TYPE_TRIGGER);
+}
+
+void entityTriggerSetShape(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const physicsshape_t shape
+) {
+  entitytrigger_t *trig = entityTriggerGet(mgr, entityId, componentId);
+  trig->shape = shape;
+}
+
+physicsshape_t entityTriggerGetShape(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entitytrigger_t *trig = entityTriggerGet(mgr, entityId, componentId);
+  return trig->shape;
+}
+
+void entityTriggerSetCollideMask(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const uint32_t mask
+) {
+  entitytrigger_t *trig = entityTriggerGet(mgr, entityId, componentId);
+  trig->collideMask = mask;
+}
+
+uint32_t entityTriggerGetCollideMask(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entitytrigger_t *trig = entityTriggerGet(mgr, entityId, componentId);
+  return trig->collideMask;
+}
+
+uint8_t entityTriggerGetOccupantCount(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+) {
+  entitytrigger_t *trig = entityTriggerGet(mgr, entityId, componentId);
+  return trig->occupantCount;
+}
+
+entityid_t entityTriggerGetOccupantEntityId(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const uint8_t index
+) {
+  entitytrigger_t *trig = entityTriggerGet(mgr, entityId, componentId);
+  if(index >= trig->occupantCount) return ENTITY_ID_INVALID;
+  return trig->occupants[index].entityId;
+}
+
+bool_t entityTriggerIsOccupyingEntity(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const entityid_t otherEntityId
+) {
+  entitytrigger_t *trig = entityTriggerGet(mgr, entityId, componentId);
+  for(uint8_t i = 0; i < trig->occupantCount; i++) {
+    if(trig->occupants[i].entityId == otherEntityId) return true;
+  }
+  return false;
+}

src/dusk/entity/component/trigger/entitytrigger.h

@@ -0,0 +1,226 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "entity/entitybase.h"
+#include "physics/physicsshape.h"
+#include "error/error.h"
+
+/** Maximum number of entities a single trigger can track at once. */
+#define ENTITY_TRIGGER_OCCUPANTS_MAX 8
+
+/** Maximum number of subscribers per trigger event (onEnter/onActive/...). */
+#define ENTITY_TRIGGER_CALLBACK_COUNT_MAX 4
+
+/**
+ * Callback invoked for a trigger's onEnter/onActive/onMove/onLeave events.
+ * See entityTriggerOnEnterAdd() and its onActive/onMove/onLeave siblings.
+ *
+ * @param mgr The entity manager that owns both entities.
+ * @param triggerEntityId The entity ID of the trigger volume.
+ * @param triggerComponentId The TRIGGER component ID.
+ * @param otherEntityId The entity ID that entered/is inside/left the
+ * trigger volume.
+ * @param otherComponentId The other entity's POSITION component ID.
+ * @param user The user pointer passed to the matching *Add() call.
+ */
+typedef void (*triggercallback_t)(
+  entitymanager_t *mgr,
+  const entityid_t triggerEntityId,
+  const componentid_t triggerComponentId,
+  const entityid_t otherEntityId,
+  const componentid_t otherComponentId,
+  void *user
+);
+
+/** Tracks one entity currently overlapping a trigger volume. */
+typedef struct {
+  /** The occupying entity's ID. */
+  entityid_t entityId;
+  /** The occupying entity's POSITION component ID. */
+  componentid_t componentId;
+  /** The occupying entity's local position as of the last step, used to
+   * detect movement (see entityTriggerOnMoveAdd()). */
+  vec3 lastPosition;
+} entitytriggeroccupant_t;
+
+typedef struct {
+  /** The trigger volume's shape, in the owning entity's local space. */
+  physicsshape_t shape;
+
+  /**
+   * Bitmask of collision layers/categories this trigger detects. An
+   * entity's PHYSICS body is only tested against this trigger if
+   * (trigger.collideMask & body.collideMask) is non-zero -- i.e. they
+   * share at least one set bit. Defaults to 0x1 (only bit 0 set). See
+   * entityPhysicsSetCollideMask().
+   */
+  uint32_t collideMask;
+
+  /** Number of entities currently tracked in occupants. */
+  uint8_t occupantCount;
+  /** Entities currently overlapping this trigger. */
+  entitytriggeroccupant_t occupants[ENTITY_TRIGGER_OCCUPANTS_MAX];
+
+  /** Fired the step an entity begins overlapping this trigger. */
+  uint8_t onEnterCount;
+  triggercallback_t onEnter[ENTITY_TRIGGER_CALLBACK_COUNT_MAX];
+  void *onEnterUser[ENTITY_TRIGGER_CALLBACK_COUNT_MAX];
+
+  /** Fired every step an entity continues overlapping this trigger,
+   * starting the step after onEnter fired. */
+  uint8_t onActiveCount;
+  triggercallback_t onActive[ENTITY_TRIGGER_CALLBACK_COUNT_MAX];
+  void *onActiveUser[ENTITY_TRIGGER_CALLBACK_COUNT_MAX];
+
+  /** Fired alongside onActive on any step where the entity's position
+   * changed since the previous step. */
+  uint8_t onMoveCount;
+  triggercallback_t onMove[ENTITY_TRIGGER_CALLBACK_COUNT_MAX];
+  void *onMoveUser[ENTITY_TRIGGER_CALLBACK_COUNT_MAX];
+
+  /** Fired the step an entity stops overlapping this trigger. */
+  uint8_t onLeaveCount;
+  triggercallback_t onLeave[ENTITY_TRIGGER_CALLBACK_COUNT_MAX];
+  void *onLeaveUser[ENTITY_TRIGGER_CALLBACK_COUNT_MAX];
+} entitytrigger_t;
+
+/**
+ * Initializes the trigger component: defaults to a 1x1x1 cube volume, no
+ * tracked occupants, and no event subscribers.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ */
+void entityTriggerInit(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Gets the underlying trigger structure (temporarily) for the given
+ * entity. Prefer the dedicated getters/setters where possible.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return The trigger component data for the given entity and component ID.
+ */
+entitytrigger_t *entityTriggerGet(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Sets the shape of the trigger volume.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param shape The new shape to set on the trigger volume.
+ */
+void entityTriggerSetShape(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const physicsshape_t shape
+);
+
+/**
+ * Gets the shape of the trigger volume.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return The shape of the trigger volume.
+ */
+physicsshape_t entityTriggerGetShape(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Sets the collision mask of the trigger volume. An entity's PHYSICS body
+ * is only detected if their masks share at least one set bit.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param mask The new collision mask to set on the trigger volume.
+ */
+void entityTriggerSetCollideMask(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const uint32_t mask
+);
+
+/**
+ * Gets the collision mask of the trigger volume.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return The collision mask of the trigger volume.
+ */
+uint32_t entityTriggerGetCollideMask(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Gets the number of entities currently overlapping this trigger.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return The number of currently tracked occupants.
+ */
+uint8_t entityTriggerGetOccupantCount(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId
+);
+
+/**
+ * Gets the entity ID of the occupant at the given index, in [0,
+ * entityTriggerGetOccupantCount()). Order is not stable across steps.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param index The occupant index.
+ * @return The occupying entity's ID, or ENTITY_ID_INVALID if index is out
+ * of range.
+ */
+entityid_t entityTriggerGetOccupantEntityId(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const uint8_t index
+);
+
+/**
+ * Checks whether a specific entity is currently overlapping this trigger.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param otherEntityId The entity ID to check for.
+ * @return True if otherEntityId is a currently tracked occupant.
+ */
+bool_t entityTriggerIsOccupyingEntity(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const entityid_t otherEntityId
+);

src/dusk/entity/component/trigger/entitytriggerevents.c

@@ -0,0 +1,221 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "entitytriggerevents.h"
+#include "assert/assert.h"
+
+void entityTriggerOnEnterAdd(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const triggercallback_t callback,
+  void *user
+) {
+  entitytrigger_t *trig = entityTriggerGet(mgr, entityId, componentId);
+  assertTrue(
+    trig->onEnterCount < ENTITY_TRIGGER_CALLBACK_COUNT_MAX,
+    "Trigger onEnter callback slots full"
+  );
+  trig->onEnter[trig->onEnterCount] = callback;
+  trig->onEnterUser[trig->onEnterCount] = user;
+  trig->onEnterCount++;
+}
+
+void entityTriggerOnEnterRemove(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const triggercallback_t callback
+) {
+  entitytrigger_t *trig = entityTriggerGet(mgr, entityId, componentId);
+  for(uint8_t i = 0; i < trig->onEnterCount; i++) {
+    if(trig->onEnter[i] != callback) continue;
+    trig->onEnterCount--;
+    for(uint8_t j = i; j < trig->onEnterCount; j++) {
+      trig->onEnter[j] = trig->onEnter[j + 1];
+      trig->onEnterUser[j] = trig->onEnterUser[j + 1];
+    }
+    return;
+  }
+}
+
+void entityTriggerOnActiveAdd(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const triggercallback_t callback,
+  void *user
+) {
+  entitytrigger_t *trig = entityTriggerGet(mgr, entityId, componentId);
+  assertTrue(
+    trig->onActiveCount < ENTITY_TRIGGER_CALLBACK_COUNT_MAX,
+    "Trigger onActive callback slots full"
+  );
+  trig->onActive[trig->onActiveCount] = callback;
+  trig->onActiveUser[trig->onActiveCount] = user;
+  trig->onActiveCount++;
+}
+
+void entityTriggerOnActiveRemove(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const triggercallback_t callback
+) {
+  entitytrigger_t *trig = entityTriggerGet(mgr, entityId, componentId);
+  for(uint8_t i = 0; i < trig->onActiveCount; i++) {
+    if(trig->onActive[i] != callback) continue;
+    trig->onActiveCount--;
+    for(uint8_t j = i; j < trig->onActiveCount; j++) {
+      trig->onActive[j] = trig->onActive[j + 1];
+      trig->onActiveUser[j] = trig->onActiveUser[j + 1];
+    }
+    return;
+  }
+}
+
+void entityTriggerOnMoveAdd(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const triggercallback_t callback,
+  void *user
+) {
+  entitytrigger_t *trig = entityTriggerGet(mgr, entityId, componentId);
+  assertTrue(
+    trig->onMoveCount < ENTITY_TRIGGER_CALLBACK_COUNT_MAX,
+    "Trigger onMove callback slots full"
+  );
+  trig->onMove[trig->onMoveCount] = callback;
+  trig->onMoveUser[trig->onMoveCount] = user;
+  trig->onMoveCount++;
+}
+
+void entityTriggerOnMoveRemove(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const triggercallback_t callback
+) {
+  entitytrigger_t *trig = entityTriggerGet(mgr, entityId, componentId);
+  for(uint8_t i = 0; i < trig->onMoveCount; i++) {
+    if(trig->onMove[i] != callback) continue;
+    trig->onMoveCount--;
+    for(uint8_t j = i; j < trig->onMoveCount; j++) {
+      trig->onMove[j] = trig->onMove[j + 1];
+      trig->onMoveUser[j] = trig->onMoveUser[j + 1];
+    }
+    return;
+  }
+}
+
+void entityTriggerOnLeaveAdd(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const triggercallback_t callback,
+  void *user
+) {
+  entitytrigger_t *trig = entityTriggerGet(mgr, entityId, componentId);
+  assertTrue(
+    trig->onLeaveCount < ENTITY_TRIGGER_CALLBACK_COUNT_MAX,
+    "Trigger onLeave callback slots full"
+  );
+  trig->onLeave[trig->onLeaveCount] = callback;
+  trig->onLeaveUser[trig->onLeaveCount] = user;
+  trig->onLeaveCount++;
+}
+
+void entityTriggerOnLeaveRemove(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const triggercallback_t callback
+) {
+  entitytrigger_t *trig = entityTriggerGet(mgr, entityId, componentId);
+  for(uint8_t i = 0; i < trig->onLeaveCount; i++) {
+    if(trig->onLeave[i] != callback) continue;
+    trig->onLeaveCount--;
+    for(uint8_t j = i; j < trig->onLeaveCount; j++) {
+      trig->onLeave[j] = trig->onLeave[j + 1];
+      trig->onLeaveUser[j] = trig->onLeaveUser[j + 1];
+    }
+    return;
+  }
+}
+
+void entityTriggerFireEnter(
+  entitymanager_t *mgr,
+  const entityid_t triggerEntityId,
+  const componentid_t triggerComponentId,
+  const entityid_t otherEntityId,
+  const componentid_t otherComponentId
+) {
+  entitytrigger_t *trig = entityTriggerGet(
+    mgr, triggerEntityId, triggerComponentId
+  );
+  for(uint8_t i = 0; i < trig->onEnterCount; i++) {
+    trig->onEnter[i](
+      mgr, triggerEntityId, triggerComponentId,
+      otherEntityId, otherComponentId, trig->onEnterUser[i]
+    );
+  }
+}
+
+void entityTriggerFireActive(
+  entitymanager_t *mgr,
+  const entityid_t triggerEntityId,
+  const componentid_t triggerComponentId,
+  const entityid_t otherEntityId,
+  const componentid_t otherComponentId
+) {
+  entitytrigger_t *trig = entityTriggerGet(
+    mgr, triggerEntityId, triggerComponentId
+  );
+  for(uint8_t i = 0; i < trig->onActiveCount; i++) {
+    trig->onActive[i](
+      mgr, triggerEntityId, triggerComponentId,
+      otherEntityId, otherComponentId, trig->onActiveUser[i]
+    );
+  }
+}
+
+void entityTriggerFireMove(
+  entitymanager_t *mgr,
+  const entityid_t triggerEntityId,
+  const componentid_t triggerComponentId,
+  const entityid_t otherEntityId,
+  const componentid_t otherComponentId
+) {
+  entitytrigger_t *trig = entityTriggerGet(
+    mgr, triggerEntityId, triggerComponentId
+  );
+  for(uint8_t i = 0; i < trig->onMoveCount; i++) {
+    trig->onMove[i](
+      mgr, triggerEntityId, triggerComponentId,
+      otherEntityId, otherComponentId, trig->onMoveUser[i]
+    );
+  }
+}
+
+void entityTriggerFireLeave(
+  entitymanager_t *mgr,
+  const entityid_t triggerEntityId,
+  const componentid_t triggerComponentId,
+  const entityid_t otherEntityId,
+  const componentid_t otherComponentId
+) {
+  entitytrigger_t *trig = entityTriggerGet(
+    mgr, triggerEntityId, triggerComponentId
+  );
+  for(uint8_t i = 0; i < trig->onLeaveCount; i++) {
+    trig->onLeave[i](
+      mgr, triggerEntityId, triggerComponentId,
+      otherEntityId, otherComponentId, trig->onLeaveUser[i]
+    );
+  }
+}

src/dusk/entity/component/trigger/entitytriggerevents.h

@@ -0,0 +1,220 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "entitytrigger.h"
+
+/**
+ * Subscribes a callback to a trigger's onEnter event, fired the step an
+ * entity begins overlapping the trigger volume.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param callback The callback to invoke.
+ * @param user Arbitrary pointer forwarded to the callback unchanged.
+ */
+void entityTriggerOnEnterAdd(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const triggercallback_t callback,
+  void *user
+);
+
+/**
+ * Unsubscribes a previously added onEnter callback. No-op if not
+ * currently subscribed.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param callback The callback that was passed to entityTriggerOnEnterAdd().
+ */
+void entityTriggerOnEnterRemove(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const triggercallback_t callback
+);
+
+/**
+ * Subscribes a callback to a trigger's onActive event, fired every step an
+ * entity continues overlapping the trigger volume (starting the step
+ * after onEnter fired).
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param callback The callback to invoke.
+ * @param user Arbitrary pointer forwarded to the callback unchanged.
+ */
+void entityTriggerOnActiveAdd(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const triggercallback_t callback,
+  void *user
+);
+
+/**
+ * Unsubscribes a previously added onActive callback. No-op if not
+ * currently subscribed.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param callback The callback that was passed to entityTriggerOnActiveAdd().
+ */
+void entityTriggerOnActiveRemove(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const triggercallback_t callback
+);
+
+/**
+ * Subscribes a callback to a trigger's onMove event, fired alongside
+ * onActive on any step where the overlapping entity's position changed
+ * since the previous step.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param callback The callback to invoke.
+ * @param user Arbitrary pointer forwarded to the callback unchanged.
+ */
+void entityTriggerOnMoveAdd(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const triggercallback_t callback,
+  void *user
+);
+
+/**
+ * Unsubscribes a previously added onMove callback. No-op if not currently
+ * subscribed.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param callback The callback that was passed to entityTriggerOnMoveAdd().
+ */
+void entityTriggerOnMoveRemove(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const triggercallback_t callback
+);
+
+/**
+ * Subscribes a callback to a trigger's onLeave event, fired the step an
+ * entity stops overlapping the trigger volume.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param callback The callback to invoke.
+ * @param user Arbitrary pointer forwarded to the callback unchanged.
+ */
+void entityTriggerOnLeaveAdd(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const triggercallback_t callback,
+  void *user
+);
+
+/**
+ * Unsubscribes a previously added onLeave callback. No-op if not
+ * currently subscribed.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @param callback The callback that was passed to entityTriggerOnLeaveAdd().
+ */
+void entityTriggerOnLeaveRemove(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const triggercallback_t callback
+);
+
+/**
+ * Internal. Invokes every subscribed onEnter callback for a trigger.
+ * Called by triggerSystemStep() when an entity begins overlapping.
+ *
+ * @param mgr The entity manager that owns both entities.
+ * @param triggerEntityId The entity ID of the trigger volume.
+ * @param triggerComponentId The TRIGGER component ID.
+ * @param otherEntityId The entity ID that entered the trigger volume.
+ * @param otherComponentId The other entity's POSITION component ID.
+ */
+void entityTriggerFireEnter(
+  entitymanager_t *mgr,
+  const entityid_t triggerEntityId,
+  const componentid_t triggerComponentId,
+  const entityid_t otherEntityId,
+  const componentid_t otherComponentId
+);
+
+/**
+ * Internal. Invokes every subscribed onActive callback for a trigger.
+ * Called by triggerSystemStep() for every entity still overlapping.
+ *
+ * @param mgr The entity manager that owns both entities.
+ * @param triggerEntityId The entity ID of the trigger volume.
+ * @param triggerComponentId The TRIGGER component ID.
+ * @param otherEntityId The entity ID still inside the trigger volume.
+ * @param otherComponentId The other entity's POSITION component ID.
+ */
+void entityTriggerFireActive(
+  entitymanager_t *mgr,
+  const entityid_t triggerEntityId,
+  const componentid_t triggerComponentId,
+  const entityid_t otherEntityId,
+  const componentid_t otherComponentId
+);
+
+/**
+ * Internal. Invokes every subscribed onMove callback for a trigger.
+ * Called by triggerSystemStep() when an overlapping entity's position
+ * changed since the previous step.
+ *
+ * @param mgr The entity manager that owns both entities.
+ * @param triggerEntityId The entity ID of the trigger volume.
+ * @param triggerComponentId The TRIGGER component ID.
+ * @param otherEntityId The entity ID that moved within the trigger volume.
+ * @param otherComponentId The other entity's POSITION component ID.
+ */
+void entityTriggerFireMove(
+  entitymanager_t *mgr,
+  const entityid_t triggerEntityId,
+  const componentid_t triggerComponentId,
+  const entityid_t otherEntityId,
+  const componentid_t otherComponentId
+);
+
+/**
+ * Internal. Invokes every subscribed onLeave callback for a trigger.
+ * Called by triggerSystemStep() when an entity stops overlapping.
+ *
+ * @param mgr The entity manager that owns both entities.
+ * @param triggerEntityId The entity ID of the trigger volume.
+ * @param triggerComponentId The TRIGGER component ID.
+ * @param otherEntityId The entity ID that left the trigger volume.
+ * @param otherComponentId The other entity's POSITION component ID.
+ */
+void entityTriggerFireLeave(
+  entitymanager_t *mgr,
+  const entityid_t triggerEntityId,
+  const componentid_t triggerComponentId,
+  const entityid_t otherEntityId,
+  const componentid_t otherComponentId
+);

src/dusk/entity/componentlist.h

@@ -0,0 +1,31 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "entity/component/display/entityposition.h"
+#include "entity/component/display/entitycamera.h"
+#include "entity/component/display/entityrenderable.h"
+#include "entity/component/physics/entityphysics.h"
+#include "entity/component/trigger/entitytrigger.h"
+#include "entity/component/animation/entityanimation.h"
+
+// Name (Uppercase)
+// Structure
+// Field name (lowercase)
+// Init function (optional)
+// Dispose function (optional)
+// Render function (optional)
+
+X(POSITION, entityposition_t, position, entityPositionInit, NULL, NULL)
+X(CAMERA, entitycamera_t, camera, entityCameraInit, NULL, NULL)
+X(RENDERABLE, entityrenderable_t, renderable,
+  entityRenderableInit, entityRenderableDispose, NULL)
+X(PHYSICS, entityphysics_t, physics, entityPhysicsInit, NULL, NULL)
+X(TRIGGER, entitytrigger_t, trigger, entityTriggerInit, NULL, NULL)
+X(ANIMATION, entityanimation_t, animation, entityAnimationInit, NULL, NULL)
+
+// Game-specific components
+#include "entity/gamecomponentlist.h"

src/dusk/entity/entity.c

@@ -0,0 +1,215 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "entitymanager.h"
+#include "component/display/entityposition.h"
+#include "util/memory.h"
+#include "util/string.h"
+#include "assert/assert.h"
+
+void entityInit(entitymanager_t *mgr, const entityid_t entityId) {
+  entity_t *ent = &mgr->entities[entityId];
+
+  memoryZero(ent, sizeof(entity_t));
+
+  // Mark all component types not using this entity.
+  for(
+    componenttype_t compType = 0;
+    compType < COMPONENT_TYPE_COUNT;
+    compType++
+  ) {
+    mgr->entitiesWithComponent[
+      compType * ENTITY_COUNT_MAX + entityId
+    ] = COMPONENT_ID_INVALID;
+  }
+
+  ent->state |= ENTITY_STATE_ACTIVE;
+}
+
+componentid_t entityAddComponent(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componenttype_t type
+) {
+  componentindex_t compInd;
+
+  for(componentid_t i = 0; i < ENTITY_COMPONENT_COUNT_MAX; i++) {
+    compInd = componentGetIndex(entityId, i);
+    if(mgr->components[compInd].type != COMPONENT_TYPE_NULL) {
+      assertTrue(
+        mgr->components[compInd].type != type,
+        "Entity already has component of this type"
+      );
+      continue;
+    }
+    componentInit(mgr, entityId, i, type);
+    mgr->entitiesWithComponent[
+      type * ENTITY_COUNT_MAX + entityId
+    ] = i;
+    return i;
+  }
+
+  assertUnreachable("Entity has no more component slots available");
+  return COMPONENT_ID_INVALID;
+}
+
+componentid_t entityGetComponent(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componenttype_t type
+) {
+  componentid_t compId = mgr->entitiesWithComponent[
+    type * ENTITY_COUNT_MAX + entityId
+  ];
+  if(compId == COMPONENT_ID_INVALID) return compId;
+  assertTrue(
+    mgr->components[componentGetIndex(entityId, compId)].type == type,
+    "Component type mismatch"
+  );
+  return compId;
+}
+
+void entitySetName(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const char_t *name
+) {
+  stringCopy(mgr->entities[entityId].name, name, ENTITY_NAME_MAX);
+}
+
+const char_t *entityGetName(
+  entitymanager_t *mgr,
+  const entityid_t entityId
+) {
+  return mgr->entities[entityId].name;
+}
+
+entityid_t entityFindByName(
+  entitymanager_t *mgr,
+  const char_t *name
+) {
+  for(entityid_t i = 0; i < ENTITY_COUNT_MAX; i++) {
+    if(!(mgr->entities[i].state & ENTITY_STATE_ACTIVE)) continue;
+    if(stringEquals(mgr->entities[i].name, name)) return i;
+  }
+  return ENTITY_ID_INVALID;
+}
+
+void entityDisposeDeep(entitymanager_t *mgr, const entityid_t entityId) {
+  componentid_t posComp = entityGetComponent(
+    mgr, entityId, COMPONENT_TYPE_POSITION
+  );
+  if(posComp != COMPONENT_ID_INVALID) {
+    entityPositionDisposeDeep(mgr, entityId, posComp);
+  } else {
+    entityDispose(mgr, entityId);
+  }
+}
+
+void entityUpdate(entitymanager_t *mgr, const entityid_t entityId) {
+  entity_t *ent = &mgr->entities[entityId];
+  for(uint8_t i = 0; i < ent->updateCount; i++) {
+    ent->onUpdate[i](
+      mgr, entityId, ent->updateComponentId[i], ent->updateUser[i]
+    );
+  }
+}
+
+void entityDispose(entitymanager_t *mgr, const entityid_t entityId) {
+  componentindex_t compInd;
+  entity_t *ent = &mgr->entities[entityId];
+
+  for(uint8_t i = 0; i < ent->disposeCount; i++) {
+    ent->onDispose[i](
+      mgr, entityId, ent->disposeComponentId[i], ent->disposeUser[i]
+    );
+  }
+
+  for(componentid_t i = 0; i < ENTITY_COMPONENT_COUNT_MAX; i++) {
+    compInd = componentGetIndex(entityId, i);
+    componenttype_t type = mgr->components[compInd].type;
+    if(type == COMPONENT_TYPE_NULL) continue;
+    mgr->entitiesWithComponent[
+      type * ENTITY_COUNT_MAX + entityId
+    ] = COMPONENT_ID_INVALID;
+    componentDispose(mgr, entityId, i);
+  }
+
+  ent->state = 0;
+}
+
+void entityUpdateAdd(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const entitycallback_t callback,
+  const componentid_t componentId,
+  void *user
+) {
+  entity_t *ent = &mgr->entities[entityId];
+  assertTrue(
+    ent->updateCount < ENTITY_UPDATE_CALLBACK_COUNT_MAX,
+    "Entity update callback slots full"
+  );
+  ent->onUpdate[ent->updateCount] = callback;
+  ent->updateComponentId[ent->updateCount] = componentId;
+  ent->updateUser[ent->updateCount] = user;
+  ent->updateCount++;
+}
+
+void entityUpdateRemove(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const entitycallback_t callback
+) {
+  entity_t *ent = &mgr->entities[entityId];
+  for(uint8_t i = 0; i < ent->updateCount; i++) {
+    if(ent->onUpdate[i] != callback) continue;
+    ent->updateCount--;
+    for(uint8_t j = i; j < ent->updateCount; j++) {
+      ent->onUpdate[j]          = ent->onUpdate[j + 1];
+      ent->updateComponentId[j] = ent->updateComponentId[j + 1];
+      ent->updateUser[j]        = ent->updateUser[j + 1];
+    }
+    return;
+  }
+}
+
+void entityDisposeAdd(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const entitycallback_t callback,
+  const componentid_t componentId,
+  void *user
+) {
+  entity_t *ent = &mgr->entities[entityId];
+  assertTrue(
+    ent->disposeCount < ENTITY_DISPOSE_CALLBACK_COUNT_MAX,
+    "Entity dispose callback slots full"
+  );
+  ent->onDispose[ent->disposeCount] = callback;
+  ent->disposeComponentId[ent->disposeCount] = componentId;
+  ent->disposeUser[ent->disposeCount] = user;
+  ent->disposeCount++;
+}
+
+void entityDisposeRemove(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const entitycallback_t callback
+) {
+  entity_t *ent = &mgr->entities[entityId];
+  for(uint8_t i = 0; i < ent->disposeCount; i++) {
+    if(ent->onDispose[i] != callback) continue;
+    ent->disposeCount--;
+    for(uint8_t j = i; j < ent->disposeCount; j++) {
+      ent->onDispose[j]          = ent->onDispose[j + 1];
+      ent->disposeComponentId[j] = ent->disposeComponentId[j + 1];
+      ent->disposeUser[j]        = ent->disposeUser[j + 1];
+    }
+    return;
+  }
+}

src/dusk/entity/entity.h

@@ -0,0 +1,202 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "component.h"
+#include "error/error.h"
+
+#define ENTITY_STATE_ACTIVE (1 << 0)
+
+#define ENTITY_UPDATE_CALLBACK_COUNT_MAX  5
+#define ENTITY_DISPOSE_CALLBACK_COUNT_MAX 5
+#define ENTITY_NAME_MAX 32
+
+typedef void (*entitycallback_t)(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componentid_t componentId,
+  void *user
+);
+
+typedef struct {
+  char_t name[ENTITY_NAME_MAX];
+  uint8_t state;
+  uint8_t updateCount;
+  uint8_t disposeCount;
+  entitycallback_t onUpdate[ENTITY_UPDATE_CALLBACK_COUNT_MAX];
+  componentid_t updateComponentId[ENTITY_UPDATE_CALLBACK_COUNT_MAX];
+  void *updateUser[ENTITY_UPDATE_CALLBACK_COUNT_MAX];
+  entitycallback_t onDispose[ENTITY_DISPOSE_CALLBACK_COUNT_MAX];
+  componentid_t disposeComponentId[ENTITY_DISPOSE_CALLBACK_COUNT_MAX];
+  void *disposeUser[ENTITY_DISPOSE_CALLBACK_COUNT_MAX];
+} entity_t;
+
+/**
+ * Initializes an entity with the given ID.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The ID of the entity to initialize.
+ */
+void entityInit(entitymanager_t *mgr, const entityid_t entityId);
+
+/**
+ * Adds a component of the given type to the entity with the given ID.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The ID of the entity to add the component to.
+ * @param type The type of the component to add.
+ * @return The ID of the entity with component.
+ */
+componentid_t entityAddComponent(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componenttype_t type
+);
+
+/**
+ * Gets the ID of the component of the given type on the entity with the
+ * given ID, or COMPONENT_ID_INVALID if the entity lacks the component.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The ID of the entity to get the component from.
+ * @param type The type of the component to get.
+ * @return The ID of the component.
+ */
+componentid_t entityGetComponent(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const componenttype_t type
+);
+
+/**
+ * Sets an entity's name. Names are optional -- an entity's name is empty
+ * by default (entityInit zeroes it) -- but are required to make the
+ * entity referenceable by name, e.g. as a parent via
+ * entityPositionSetParent().
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The ID of the entity to name.
+ * @param name The name to give the entity. Must be shorter than
+ * ENTITY_NAME_MAX.
+ */
+void entitySetName(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const char_t *name
+);
+
+/**
+ * Gets an entity's name, or an empty string if it has none.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The ID of the entity to get the name of.
+ * @return The entity's name.
+ */
+const char_t *entityGetName(
+  entitymanager_t *mgr,
+  const entityid_t entityId
+);
+
+/**
+ * Finds the first active entity with the given name.
+ *
+ * @param mgr The entity manager to search.
+ * @param name The name to search for.
+ * @return The entity ID, or ENTITY_ID_INVALID if no active entity matches.
+ */
+entityid_t entityFindByName(
+  entitymanager_t *mgr,
+  const char_t *name
+);
+
+/**
+ * Runs all registered update callbacks for the entity.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The ID of the entity to update.
+ */
+void entityUpdate(entitymanager_t *mgr, const entityid_t entityId);
+
+/**
+ * Disposes of an entity with the given ID. Fires all dispose callbacks
+ * before cleaning up components and state.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The ID of the entity to dispose of.
+ */
+void entityDispose(entitymanager_t *mgr, const entityid_t entityId);
+
+/**
+ * Disposes of an entity and all of its position-component descendants
+ * recursively. If the entity has no position component, behaves like
+ * entityDispose.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The root entity ID.
+ */
+void entityDisposeDeep(entitymanager_t *mgr, const entityid_t entityId);
+
+/**
+ * Registers an update callback, invoked each time entityUpdate is called.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity to register on.
+ * @param callback The function to call.
+ * @param componentId The component ID passed back to the callback.
+ * @param user Userdata passed back to the callback.
+ */
+void entityUpdateAdd(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const entitycallback_t callback,
+  const componentid_t componentId,
+  void *user
+);
+
+/**
+ * Removes a previously registered update callback.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity to remove from.
+ * @param callback The function to remove.
+ */
+void entityUpdateRemove(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const entitycallback_t callback
+);
+
+/**
+ * Registers a dispose callback, invoked at the start of entityDispose
+ * before any component or state cleanup.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity to register on.
+ * @param callback The function to call.
+ * @param componentId The component ID passed back to the callback.
+ * @param user Userdata passed back to the callback.
+ */
+void entityDisposeAdd(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const entitycallback_t callback,
+  const componentid_t componentId,
+  void *user
+);
+
+/**
+ * Removes a previously registered dispose callback.
+ *
+ * @param mgr The entity manager that owns the entity.
+ * @param entityId The entity to remove from.
+ * @param callback The function to remove.
+ */
+void entityDisposeRemove(
+  entitymanager_t *mgr,
+  const entityid_t entityId,
+  const entitycallback_t callback
+);

src/dusk/entity/entitybase.h

@@ -0,0 +1,24 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "dusk.h"
+
+#define ENTITY_COUNT_MAX 64
+#define ENTITY_COMPONENT_COUNT_MAX 16
+
+#define ENTITY_ID_INVALID     0xFF
+#define COMPONENT_ID_INVALID  0xFF
+
+typedef uint8_t entityid_t;
+typedef uint8_t componentid_t;
+typedef uint16_t componentindex_t;
+
+// Forward declared here (rather than in component.h) so every entity/
+// component header can reference entitymanager_t* regardless of include
+// order, without needing a full entitymanager.h include.
+typedef struct entitymanager_t entitymanager_t;