Map refactoring to prep for loading

src/engine/engine.c

@@ -41,7 +41,7 @@ errorret_t engineInit(const int32_t argc, const char_t **argv) {
   // Run the initial script.
   scriptcontext_t ctx;
   errorChain(scriptContextInit(&ctx));
-  errorChain(scriptContextExecFile(&ctx, "script/init.dsf"));
+  errorChain(scriptContextExecFile(&ctx, "init.dsf"));
   scriptContextDispose(&ctx);
 
   errorOk();

src/rpg/rpgcamera.c

@@ -18,6 +18,8 @@ void rpgCameraInit(void) {
 }
 
 errorret_t rpgCameraUpdate(void) {
+  if(!mapIsLoaded()) errorOk();
+  
   chunkpos_t chunkPos;
 
   switch(RPG_CAMERA.mode) {

src/rpg/world/map.c

@@ -10,32 +10,66 @@
 #include "assert/assert.h"
 #include "asset/asset.h"
 #include "rpg/entity/entity.h"
+#include "util/string.h"
 
 map_t MAP;
 
 errorret_t mapInit() {
   memoryZero(&MAP, sizeof(map_t));
+  errorOk();
+}
+
+bool_t mapIsLoaded() {
+  return MAP.filePath[0] != '\0';
+}
+
+errorret_t mapLoad(const char_t *path, const chunkpos_t position) {
+  assertStrLenMin(path, 1, "Map file path cannot be empty");
+  assertStrLenMax(path, MAP_FILE_PATH_MAX - 1, "Map file path too long");
+
+  if(stringCompare(MAP.filePath, path) == 0) {
+    // Same map, no need to reload
+    errorOk();
+  }
+
+  chunkindex_t i;
   
-  // Init the first chunks.
-  chunkindex_t index = 0;
+  // Unload all loaded chunks
+  if(mapIsLoaded()) {
+    for(i = 0; i < MAP_CHUNK_COUNT; i++) {
+      mapChunkUnload(&MAP.chunks[i]);
+    }
+  }
+
+  // Store the map file path
+  stringCopy(MAP.filePath, path, MAP_FILE_PATH_MAX);
+
+  // Reset map position
+  MAP.chunkPosition = position;
+
+  // Perform "initial load"
+  i = 0;
   for(chunkunit_t z = 0; z < MAP_CHUNK_DEPTH; z++) {
     for(chunkunit_t y = 0; y < MAP_CHUNK_HEIGHT; y++) {
       for(chunkunit_t x = 0; x < MAP_CHUNK_WIDTH; x++) {
-        chunk_t *chunk = &MAP.chunks[index];
-        chunk->position.x = x;
-        chunk->position.y = y;
-        chunk->position.z = z;
-        MAP.chunkOrder[index] = chunk;
+        chunk_t *chunk = &MAP.chunks[i];
+        chunk->position.x = x + position.x;
+        chunk->position.y = y + position.y;
+        chunk->position.z = z + position.z;
+        MAP.chunkOrder[i] = chunk;
         errorChain(mapChunkLoad(chunk));
-        index++;
+        i++;
       }
     }
   }
 
+  // Execute map script.
   errorOk();
 }
 
 errorret_t mapPositionSet(const chunkpos_t newPos) {
+  if(!mapIsLoaded()) errorThrow("No map loaded");
+
   const chunkpos_t curPos = MAP.chunkPosition;
   if(chunkPositionIsEqual(curPos, newPos)) {
     errorOk();
@@ -131,6 +165,7 @@ void mapChunkUnload(chunk_t* chunk) {
     entity_t *entity = &ENTITIES[chunk->entities[i]];
     entity->type = ENTITY_TYPE_NULL;
   }
+
   for(uint8_t i = 0; i < chunk->meshCount; i++) {
     if(chunk->meshes[i].vertexCount == 0) continue;
     meshDispose(&chunk->meshes[i]);
@@ -138,28 +173,37 @@ void mapChunkUnload(chunk_t* chunk) {
 }
 
 errorret_t mapChunkLoad(chunk_t* chunk) {
+  if(!mapIsLoaded()) errorThrow("No map loaded");
+
   char_t buffer[64];
 
+  // TODO: Can probably move this to asset load logic?
   chunk->meshCount = 0;
   memoryZero(chunk->meshes, sizeof(chunk->meshes));
   memorySet(chunk->entities, 0xFF, sizeof(chunk->entities));
 
-  snprintf(buffer, sizeof(buffer), "map/map/%d_%d_%d.dcf",
+  // Get chunk filepath.
+  snprintf(buffer, sizeof(buffer), "%s/%d_%d_%d.dcf",
+    MAP.filePath,
     chunk->position.x,
     chunk->position.y,
     chunk->position.z
   );
 
+  // Chunk available?
   if(!assetFileExists(buffer)) {
     memoryZero(chunk->tiles, sizeof(chunk->tiles));
     errorOk();
   }
 
+  // Load.
   errorChain(assetLoad(buffer, chunk));
   errorOk();
 }
 
 chunkindex_t mapGetChunkIndexAt(const chunkpos_t position) {
+  if(!mapIsLoaded()) return -1;
+
   chunkpos_t relPos = {
     position.x - MAP.chunkPosition.x,
     position.y - MAP.chunkPosition.y,
@@ -180,10 +224,13 @@ chunkindex_t mapGetChunkIndexAt(const chunkpos_t position) {
 
 chunk_t* mapGetChunk(const uint8_t index) {
   if(index >= MAP_CHUNK_COUNT) return NULL;
+  if(!mapIsLoaded()) return NULL;
   return MAP.chunkOrder[index];
 }
 
 tile_t mapGetTile(const worldpos_t position) {
+  if(!mapIsLoaded()) return TILE_SHAPE_NULL;
+
   chunkpos_t chunkPos;
   worldPosToChunkPos(&position, &chunkPos);
   chunkindex_t chunkIndex = mapGetChunkIndexAt(chunkPos);

src/rpg/world/map.h

@@ -8,7 +8,10 @@
 #pragma once
 #include "rpg/world/chunk.h"
 
+#define MAP_FILE_PATH_MAX 128
+
 typedef struct map_s {
+  char_t filePath[MAP_FILE_PATH_MAX];
   chunk_t chunks[MAP_CHUNK_COUNT];
   chunk_t *chunkOrder[MAP_CHUNK_COUNT];
   chunkpos_t chunkPosition;
@@ -23,6 +26,25 @@ extern map_t MAP;
  */
 errorret_t mapInit();
 
+/**
+ * Checks if a map is loaded.
+ * 
+ * @return true if a map is loaded, false otherwise.
+ */
+bool_t mapIsLoaded();
+
+/**
+ * Loads a map from the given file path.
+ * 
+ * @param path The file path.
+ * @param position The initial chunk position.
+ * @return An error code.
+ */
+errorret_t mapLoad(
+  const char_t *path,
+  const chunkpos_t position
+);
+
 /**
  * Updates the map.
  */

src/scene/scene/scenemap.c

@@ -89,6 +89,8 @@ void sceneMapEntityGetPosition(const entity_t *entity, vec3 outPosition) {
 }
 
 void sceneMapRender(scenedata_t *data) {
+  if(!mapIsLoaded()) return;
+  
   // Look at target.
   vec3 cameraTarget;
   switch(RPG_CAMERA.mode) {
@@ -166,6 +168,8 @@ void sceneMapRenderEntity(entity_t *entity) {
 }
 
 void sceneMapRenderMap() {
+  assertTrue(mapIsLoaded(), "No map loaded to render");
+
   // For each chunk.
   for(uint32_t i = 0; i < MAP_CHUNK_COUNT; i++) {
     chunk_t *chunk = MAP.chunkOrder[i];

src/scene/scenemanager.c

@@ -10,6 +10,8 @@
 #include "assert/assert.h"
 #include "display/framebuffer.h"
 #include "util/string.h"
+#include "asset/asset.h"
+#include "script/scriptmanager.h"
 
 scenemanager_t SCENE_MANAGER;
 
@@ -60,9 +62,20 @@ errorret_t sceneManagerSetScene(scene_t *scene) {
   
   SCENE_MANAGER.current = scene;
 
-  if(scene && scene->init) {
+  if(scene && (scene->flags & SCENE_FLAG_INITIALIZED) == 0) {
     scene->flags |= SCENE_FLAG_INITIALIZED;
-    errorChain(scene->init(&SCENE_MANAGER.sceneData));
+
+    if(scene->init) errorChain(scene->init(&SCENE_MANAGER.sceneData));
+
+    // Execute scene script if it exists
+    char_t buffer[256];
+    snprintf(buffer, sizeof(buffer), "scene/%s.dsf", scene->name);
+    if(assetFileExists(buffer)) {
+      scriptcontext_t ctx;
+      scriptContextInit(&ctx);
+      errorChain(scriptContextExecFile(&ctx, buffer));
+      scriptContextDispose(&ctx);
+    }
   }
 
   errorOk();

src/script/module/modulescene.h

@@ -28,7 +28,6 @@ int32_t moduleSceneSetScene(lua_State *L) {
 
   errorret_t err = sceneManagerSetScene(scene);
   if(err.code != ERROR_OK) {
-
     luaL_error(L, "Failed to set scene '%s'", sceneName);
     return 0;
   }