Physics I guess

src/display/camera.c

@@ -70,6 +70,23 @@ void cameraPushMatrix(camera_t *camera) {
         view
       );
       break;
+
+    case CAMERA_VIEW_TYPE_2D:
+      glm_mat4_identity(view);
+      glm_translate(view, (vec3){
+        -camera->_2d.position[0],
+        -camera->_2d.position[1],
+        0.0f
+      });
+      glm_scale(view, (vec3){
+        camera->_2d.zoom,
+        camera->_2d.zoom,
+        1.0f
+      });
+      break;
+
+    default:
+      assertUnreachable("Invalid camera view type");
   }
 
   #if DISPLAY_SDL2

src/display/camera.h

@@ -18,7 +18,8 @@ typedef enum {
 
 typedef enum {
   CAMERA_VIEW_TYPE_MATRIX,
-  CAMERA_VIEW_TYPE_LOOKAT
+  CAMERA_VIEW_TYPE_LOOKAT,
+  CAMERA_VIEW_TYPE_2D
 } cameraviewtype_t;
 
 typedef struct {
@@ -27,11 +28,17 @@ typedef struct {
 
   union {
     mat4 view;
+
     struct {
       float_t position[3];
       float_t target[3];
       float_t up[3];
     } lookat;
+
+    struct {
+      float_t position[2];
+      float_t zoom;
+    } _2d;
   };
 
   union {

src/display/scene/CMakeLists.txt

@@ -10,4 +10,5 @@ target_sources(${DUSK_TARGET_NAME}
 )
 
 # Subdirs
-add_subdirectory(overworld)
+add_subdirectory(overworld)
+add_subdirectory(test)

src/display/scene/overworld/sceneoverworld.c

@@ -93,9 +93,9 @@ void sceneOverworldRenderEntity(const entity_t *entity) {
   // For now, just draw a placeholder quad.
   spriteBatchPush(
     &testAsset->paletteImage.texture,
-    entity->x, entity->y,
-    entity->x + TILESET_ENTITIES.tileWidth,
-    entity->y + TILESET_ENTITIES.tileHeight,
+    entity->position[0], entity->position[1],
+    entity->position[0] + TILESET_ENTITIES.tileWidth,
+    entity->position[1] + TILESET_ENTITIES.tileHeight,
     COLOR_WHITE,
     uv[0], uv[1], uv[2], uv[3]
   );

src/display/scene/scene.h

@@ -25,6 +25,7 @@ typedef struct {
 
 typedef enum {
   SCENE_TYPE_LOGO,
+  SCENE_TYPE_TEST,
   SCENE_TYPE_OVERWORLD,
 
   SCENE_TYPE_COUNT

src/display/scene/scenemanager.c

@@ -8,12 +8,20 @@
 #include "scenemanager.h"
 
 #include "display/scene/overworld/sceneoverworld.h"
+#include "display/scene/test/scenetest.h"
 
 scenemanager_t SCENE_MANAGER;
 
 scene_t SCENE_MANAGER_SCENES[SCENE_TYPE_COUNT] = {
   [SCENE_TYPE_LOGO] = { 0 },
 
+  [SCENE_TYPE_TEST] = {
+    .init = sceneTestInit,
+    .update = sceneTestUpdate,
+    .render = sceneTestRender,
+    .dispose = sceneTestDispose
+  },
+
   [SCENE_TYPE_OVERWORLD] = {
     .init = sceneOverworldInit,
     .update = sceneOverworldUpdate,

src/display/scene/scenemanager.h

@@ -15,7 +15,22 @@ typedef struct {
 extern scenemanager_t SCENE_MANAGER;
 extern scene_t SCENE_MANAGER_SCENES[SCENE_TYPE_COUNT];
 
+/**
+ * Initializes the scene manager and the initial scene.
+ */
 errorret_t sceneManagerInit(void);
+
+/**
+ * Updates all active scenes.
+ */
 void sceneManagerUpdate(void);
+
+/**
+ * Renders all visible scenes.
+ */
 void sceneManagerRender(void);
+
+/**
+ * Disposes of all scenes.
+ */
 void sceneManagerDispose(void);

src/display/scene/test/CMakeLists.txt

@@ -0,0 +1,10 @@
+# Copyright (c) 2025 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# Sources
+target_sources(${DUSK_TARGET_NAME}
+  PRIVATE
+    scenetest.c
+)

src/display/scene/test/scenetest.c

@@ -0,0 +1,48 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "scenetest.h"
+#include "display/scene/scenemanager.h"
+#include "display/spritebatch/spritebatch.h"
+
+scenetest_t SCENE_TEST;
+
+errorret_t sceneTestInit(void) {
+  cameraInit(&SCENE_TEST.camera);
+  SCENE_TEST.camera.projType = CAMERA_PROJECTION_TYPE_ORTHOGRAPHIC;
+  SCENE_TEST.camera.nearClip = -1.0f;
+  SCENE_TEST.camera.farClip = 2.0f;
+
+  SCENE_TEST.camera.viewType = CAMERA_VIEW_TYPE_2D;
+  SCENE_TEST.camera._2d.zoom = 2.0f;
+  SCENE_TEST.camera._2d.position[0] = -150.0f;
+  SCENE_TEST.camera._2d.position[1] = -50.0f;
+
+  scene_t *scene = &SCENE_MANAGER_SCENES[SCENE_TYPE_TEST];
+  scene->flags |= SCENE_FLAG_ACTIVE | SCENE_FLAG_VISIBLE;
+
+  errorOk();
+}
+
+void sceneTestUpdate(void) {
+}
+
+void sceneTestRender(void) {
+  SCENE_TEST.camera.orthographic.left = 0.0f;
+  SCENE_TEST.camera.orthographic.right = frameBufferGetWidth(FRAMEBUFFER_BOUND);
+  SCENE_TEST.camera.orthographic.top = frameBufferGetHeight(FRAMEBUFFER_BOUND);
+  SCENE_TEST.camera.orthographic.bottom = 0.0f;
+
+  cameraPushMatrix(&SCENE_TEST.camera);
+  spriteBatchClear();
+
+  spriteBatchFlush();
+  cameraPopMatrix();
+}
+
+void sceneTestDispose(void) {
+}

src/display/scene/test/scenetest.h

@@ -0,0 +1,36 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "display/camera.h"
+#include "error/error.h"
+
+typedef struct {
+  camera_t camera;
+} scenetest_t;
+
+extern scenetest_t SCENE_TEST;
+
+/**
+ * Initialize the test scene.
+ */
+errorret_t sceneTestInit(void);
+
+/**
+ * Update the test scene.
+ */
+void sceneTestUpdate(void);
+
+/**
+ * Render the test scene.
+ */
+void sceneTestRender(void);
+
+/**
+ * Dispose of the test scene.
+ */
+void sceneTestDispose(void);