Move rendering of tiles into rendering of entities

Downgraded background rendering to each tile individually (no batching)
temporarily such that we can render all entities in one function.

src/AssetManager.c

@@ -20,6 +20,10 @@ Texture *asset_getTexture(AssetManager *assetManager, const enum TexList type)
 	if (type < texlist_count)
 		return &assetManager->textures[type];
 
+#ifdef WT_DEBUG
+	ASSERT(INVALID_CODE_PATH);
+#endif
+
 	return NULL;
 }
 
@@ -28,6 +32,9 @@ TexAtlas *asset_getTextureAtlas(AssetManager *assetManager, const enum TexList t
 	if (type < texlist_count)
 		return &assetManager->texAtlas[type];
 
+#ifdef WT_DEBUG
+	ASSERT(INVALID_CODE_PATH);
+#endif
 	return NULL;
 }
 
@@ -60,6 +67,9 @@ Shader *asset_getShader(AssetManager *assetManager, const enum ShaderList type)
 	if (type < shaderlist_count)
 		return &assetManager->shaders[type];
 
+#ifdef WT_DEBUG
+	ASSERT(INVALID_CODE_PATH);
+#endif
 	return NULL;
 }
 
@@ -234,7 +244,8 @@ const i32 asset_loadTTFont(AssetManager *assetManager, const char *filePath)
 		printf(
 		    "asset_loadTTFont() warning: The target font height creates a "
 		    "glyph sheet that exceeds the available space!");
-		ASSERT(1);
+
+		ASSERT(INVALID_CODE_PATH);
 	}
 #endif
 

src/Renderer.c

@@ -19,37 +19,6 @@ INTERNAL void updateBufferObject(Renderer *const renderer,
 	glBindBuffer(GL_ARRAY_BUFFER, 0);
 }
 
-#if 0
-void renderer_backgroundTiles(Renderer *const renderer, const v2 tileSize,
-                              World *const world, TexAtlas *const atlas,
-                              Texture *const tex)
-{
-	RenderQuad worldQuads[ARRAY_COUNT(world->tiles)] = {0};
-	i32 quadIndex = 0;
-
-	for (i32 i = 0; i < ARRAY_COUNT(world->tiles); i++)
-	{
-		Tile tile = world->tiles[i];
-		v2 tilePosInPixel = v2_scale(tile.pos, tileSize.x);
-
-		if ((tilePosInPixel.x < renderer->size.w && tilePosInPixel.x >= 0) &&
-		    (tilePosInPixel.y < renderer->size.h && tilePosInPixel.y >= 0))
-		{
-			const v4 texRect  = atlas->texRect[terraincoords_ground];
-			const v4 tileRect = getRect(tilePosInPixel, tileSize);
-
-			RenderQuad tileQuad =
-			    renderer_createQuad(renderer, tileRect, texRect, tex);
-			worldQuads[quadIndex++] = tileQuad;
-		}
-	}
-
-	updateBufferObject(renderer, worldQuads, quadIndex);
-	renderer_object(renderer, V2(0.0f, 0.0f), renderer->size, 0.0f,
-	                V3(0, 0, 0), tex);
-}
-#endif
-
 void renderer_string(Renderer *const renderer, Font *const font,
                      const char *const string, v2 pos, f32 rotate,
                      v3 color)
@@ -114,6 +83,9 @@ void renderer_debugString(Renderer *const renderer, Font *const font,
 void renderer_entity(Renderer *renderer, Entity *entity, f32 dt, f32 rotate,
                      v3 color)
 {
+	if ((entity->pos.x < renderer->size.w && entity->pos.x >= 0) &&
+	    (entity->pos.y < renderer->size.h && entity->pos.y >= 0))
+	{
 		SpriteAnim *anim = &entity->anim[entity->currAnimIndex];
 		v4 texRect       = anim->rect[anim->currRectIndex];
 
@@ -131,12 +103,13 @@ void renderer_entity(Renderer *renderer, Entity *entity, f32 dt, f32 rotate,
 			// NOTE(doyle): Flip the x coordinates to flip the tex
 			renderer_flipTexCoord(&texRect, TRUE, FALSE);
 		}
-
 		RenderQuad entityQuad =
 		    renderer_createDefaultQuad(renderer, texRect, entity->tex);
 		updateBufferObject(renderer, &entityQuad, 1);
 		renderer_object(renderer, entity->pos, entity->size, rotate, color,
 		                entity->tex);
+	}
+
 }
 
 void renderer_object(Renderer *renderer, v2 pos, v2 size, f32 rotate, v3 color,

src/WorldTraveller.c

@@ -30,33 +30,59 @@ void worldTraveller_gameInit(GameState *state, v2i windowSize)
 	glCheckError();
 
 	state->state          = state_active;
-	state->tileSize       = 64;
 	state->currWorldIndex = 0;
+	state->tileSize       = 64;
 
-	/* Init world tiles */
+	/* Init world */
-	i32 highestSquaredValue = 1;
+	const i32 targetWorldWidth  = 500 * METERS_TO_PIXEL;
-	while (squared(highestSquaredValue) < ARRAY_COUNT(state->world[0].tiles))
+	const i32 targetWorldHeight = 15 * METERS_TO_PIXEL;
-		highestSquaredValue++;
+	v2i worldDimensionInTiles   = V2i(targetWorldWidth / state->tileSize,
+	                                targetWorldHeight / state->tileSize);
 
-	const i32 worldSize = highestSquaredValue - 1;
-
-	// NOTE(doyle): Origin is center of the world
 	for (i32 i = 0; i < ARRAY_COUNT(state->world); i++)
 	{
-		for (i32 y = 0; y < worldSize; y++)
+		World *const world = &state->world[i];
-		{
+		world->maxEntities = 8192;
-			for (i32 x = 0; x < worldSize; x++)
+		world->entities =
-			{
+		    CAST(Entity *) calloc(world->maxEntities, sizeof(Entity));
-				i32 packedDimension = y * worldSize + x;
+		world->texType = texlist_terrain;
-				World *world = state->world;
 
-				world[i].texType = texlist_terrain;
+		TexAtlas *const atlas =
-				world[i].tiles[packedDimension].pos =
+		    asset_getTextureAtlas(assetManager, world->texType);
-				    V2(CAST(f32) x, CAST(f32) y);
+
+		for (i32 y = 0; y < worldDimensionInTiles.y; y++)
+		{
+			for (i32 x = 0; x < worldDimensionInTiles.x; x++)
+			{
+#ifdef WT_DEBUG
+				ASSERT(worldDimensionInTiles.x * worldDimensionInTiles.y <
+				       world->maxEntities);
+#endif
+
+				world->texType = texlist_terrain;
+				Entity *entity = &world->entities[world->freeEntityIndex++];
+				entity->pos =
+				    V2(CAST(f32) x * state->tileSize,
+				       CAST(f32) y * state->tileSize);
+				entity->dPos = V2(0.0f, 0.0f);
+				entity->size =
+				    V2(CAST(f32) state->tileSize, CAST(f32) state->tileSize);
+				entity->tex = asset_getTexture(assetManager, world->texType);
+				entity->collides = FALSE;
+				entity->freeAnimIndex = 0;
+				entity->currAnimIndex = 0;
+
+				SpriteAnim worldAnimIdle = {NULL, 1, 0, 1.0f, 1.0f};
+				worldAnimIdle.rect        = (v4 *)calloc(1, sizeof(v4));
+				worldAnimIdle.rect[0]     = atlas->texRect[terraincoords_ground];
+
+				entity->anim[entity->freeAnimIndex++] = worldAnimIdle;
 			}
 		}
 	}
 
+	World *const world = &state->world[state->currWorldIndex];
+
 	/* Init hero */
 	Entity heroEnt = {V2(0.0f, 0.0f),
 	                  V2(0.0f, 0.0f),
@@ -83,9 +109,9 @@ void worldTraveller_gameInit(GameState *state, v2i windowSize)
 	heroEnt.anim[heroEnt.freeAnimIndex++] = heroAnimWalk;
 	heroEnt.currAnimIndex = 0;
 
-	state->heroIndex = state->freeEntityIndex;
+	world->heroIndex = world->freeEntityIndex;
-	state->entityList[state->freeEntityIndex++] = heroEnt;
+	world->entities[world->freeEntityIndex++] = heroEnt;
-	Entity *hero = &state->entityList[state->heroIndex];
+	Entity *hero = &world->entities[world->heroIndex];
 
 	Texture *heroSheet = hero->tex;
 	v2 sheetSize = V2(CAST(f32)heroSheet->width, CAST(f32)heroSheet->height);
@@ -114,7 +140,7 @@ void worldTraveller_gameInit(GameState *state, v2i windowSize)
 	                 0,
 	                 0};
 	npcEnt.anim[npcEnt.freeAnimIndex++] = npcAnim;
-	state->entityList[state->freeEntityIndex++] = npcEnt;
+	world->entities[world->freeEntityIndex++] = npcEnt;
 
 	/* Init renderer */
 	Renderer *renderer = &state->renderer;
@@ -168,7 +194,8 @@ INTERNAL void parseInput(GameState *state, const f32 dt)
 	   f (t) = (a/2)*t^2 + v*t + p, where p is a constant, old position
 	 */
 
-	Entity *hero = &state->entityList[state->heroIndex];
+	World *const world = &state->world[state->currWorldIndex];
+	Entity *hero = &world->entities[world->heroIndex];
 	v2 ddPos = V2(0, 0);
 
 	if (state->keys[GLFW_KEY_SPACE])
@@ -203,7 +230,8 @@ INTERNAL void parseInput(GameState *state, const f32 dt)
 		ddPos = v2_scale(ddPos, 0.70710678118f);
 	}
 
-	f32 epsilon    = 20.0f;
+	// NOTE(doyle): Clipping threshold for snapping velocity to 0
+	f32 epsilon    = 15.0f;
 	v2 epsilonDpos = v2_sub(V2(epsilon, epsilon),
 	                        V2(absolute(hero->dPos.x), absolute(hero->dPos.y)));
 	if (epsilonDpos.x >= 0.0f && epsilonDpos.y >= 0.0f)
@@ -248,13 +276,15 @@ INTERNAL void parseInput(GameState *state, const f32 dt)
 	v2 dPos     = v2_scale(hero->dPos, dt);
 	v2 newHeroP = v2_add(v2_add(ddPosNew, dPos), hero->pos);
 
+	// TODO(doyle): Only check collision for entities within small bounding box
+	// of the hero
 	b32 heroCollided = FALSE;
 	if (hero->collides == TRUE)
 	{
-		for (i32 i = 0; i < ARRAY_COUNT(state->entityList); i++)
+		for (i32 i = 0; i < world->maxEntities; i++)
 		{
-			if (i == state->heroIndex) continue;
+			if (i == world->heroIndex) continue;
-			Entity entity = state->entityList[i];
+			Entity entity = world->entities[i];
 			if (entity.collides)
 			{
 				v4 heroRect =
@@ -295,20 +325,13 @@ void worldTraveller_gameUpdateAndRender(GameState *state, const f32 dt)
 	AssetManager *assetManager = &state->assetManager;
 	Renderer *renderer         = &state->renderer;
 
-	/* Render background tiles */
-#if 0
 	World *const world = &state->world[state->currWorldIndex];
-	TexAtlas *const worldAtlas =
+
-	    asset_getTextureAtlas(assetManager, world->texType);
-	Texture *const worldTex = asset_getTexture(assetManager, world->texType);
-	v2 tileSize = (CAST(f32)state->tileSize.w, CAST(f32)state->tileSize.h);
-	renderer_backgroundTiles(&state->renderer, tileSize, world, atlas, tex);
-#endif
 	/* Render entities */
-	ASSERT(state->freeEntityIndex < ARRAY_COUNT(state->entityList));
+	ASSERT(world->freeEntityIndex < world->maxEntities);
-	for (i32 i = 0; i < state->freeEntityIndex; i++)
+	for (i32 i = 0; i < world->freeEntityIndex; i++)
 	{
-		Entity *const entity = &state->entityList[i];
+		Entity *const entity = &world->entities[i];
 		renderer_entity(&state->renderer, entity, dt, 0.0f, V3(0, 0, 0));
 	}
 
@@ -323,7 +346,7 @@ void worldTraveller_gameUpdateAndRender(GameState *state, const f32 dt)
 	Font *font = &assetManager->font;
 	if (debugUpdateCounter <= 0)
 	{
-		Entity *hero = &state->entityList[state->heroIndex];
+		Entity *const hero = &world->entities[world->heroIndex];
 		snprintf(debugStrings[0], ARRAY_COUNT(debugStrings[0]),
 		         "Hero Pos: %06.2f,%06.2f", hero->pos.x, hero->pos.y);
 		numDebugStrings++;
@@ -333,7 +356,7 @@ void worldTraveller_gameUpdateAndRender(GameState *state, const f32 dt)
 		numDebugStrings++;
 
 		snprintf(debugStrings[2], ARRAY_COUNT(debugStrings[2]),
-		         "FreeEntityIndex: %d", state->freeEntityIndex);
+		         "FreeEntityIndex: %d", world->freeEntityIndex);
 		numDebugStrings++;
 
 		const f32 debugUpdateRate = 0.15f;

src/include/Dengine/Common.h

@@ -28,4 +28,8 @@ typedef double f64;
 
 i32 common_strlen(const char *const string);
 
+#ifdef WT_DEBUG
+#define INVALID_CODE_PATH TRUE
+#endif
+
 #endif

src/include/WorldTraveller/WorldTraveller.h

@@ -6,7 +6,7 @@
 #include "Dengine/Renderer.h"
 
 #define NUM_KEYS 1024
-#define METERS_TO_PIXEL 100
+#define METERS_TO_PIXEL 64
 
 enum State
 {
@@ -15,15 +15,16 @@ enum State
 	state_win,
 };
 
-typedef struct Tile
-{
-	v2 pos;
-} Tile;
-
 typedef struct World
 {
-	Tile tiles[2048];
+	Entity *entities;
+	i32 maxEntities;
+
 	enum TexList texType;
+
+	i32 heroIndex;
+	i32 freeEntityIndex;
+
 } World;
 
 typedef struct GameState
@@ -32,16 +33,11 @@ typedef struct GameState
 	b32 keys[NUM_KEYS];
 
 	Renderer renderer;
-	i32 heroIndex;
 
 	World world[4];
 	i32 currWorldIndex;
 	i32 tileSize;
 
-	// TODO(doyle): Make size of list dynamic
-	Entity entityList[256];
-	i32 freeEntityIndex;
-
 	AssetManager assetManager;
 } GameState;