Remove entity map in favor of spatial grid

game/main.c

@@ -32,8 +32,6 @@ bool bzMain(BzAppDesc *appDesc, int argc, const char **argv) {
     appDesc->render = (BzAppRenderFunc) render;
     appDesc->imguiRender = (BzAppRenderFunc) imguiRender;
 
-    Game *game = bzAlloc(sizeof(*game));
-    bzMemSet(game, 0, sizeof(*game));
     appDesc->userData = NULL;
     appDesc->useFlecs = true;
 
@@ -99,11 +97,12 @@ bool init(void *userData) {
         .objectGroups[OBJECTS_GAME]=(BzTileObjectsDesc) {"Game"},
         .objectGroups[OBJECTS_ENTITIES]=(BzTileObjectsDesc ) {"Entities"}
     });
-    game->entityMap = entityMapCreate(&(EntityMapDesc) {
+    game->entityGrid = bzSpatialGridCreate(&(BzSpatialGridDesc) {
         .maxWidth=game->map.width * game->map.tileWidth,
         .maxHeight=game->map.height * game->map.tileHeight,
-        .cellResolution=game->map.tileWidth,
-        .cellDepth=16
+        .cellWidth=game->map.tileWidth * 2,
+        .cellHeight=game->map.tileHeight * 2,
+        .userDataSize=sizeof(ecs_entity_t)
     });
 
     bzTileMapOverrideLayer(&game->map, LAYER_BUILDING_OWNER, initBuildingsLayer);
@@ -129,6 +128,10 @@ void deinit(void *userData) {
     bzTilesetDestroy(&game->buildingsTileset);
     bzTilesetDestroy(&game->entitiesTileset);
 
+
+    bzObjectPoolDestroy(game->pools.pathData);
+    bzSpatialGridDestroy(game->entityGrid);
+
     ecs_singleton_remove(ECS, Game);
 }
 
@@ -226,6 +229,8 @@ void render(float dt, void *userData) {
                            game->input.buildingSize.sizeY * height, placeColor);
     }
 
+    bzSpatialGridDrawDebugGrid(game->entityGrid);
+
 
     Vector2 worldPos = GetScreenToWorld2D(GetMousePosition(), game->camera);
     int tileX = (int) worldPos.x / 16;