Add trees as entities

game/components.h

@@ -6,8 +6,9 @@
 
 #include "utils/building_types.h"
 
-
-#define ecs_set_p(world, e, T, ...) ecs_set_id(world, e, ecs_id(T), sizeof(T), (T*)__VA_ARGS__)
+extern ECS_TAG_DECLARE(TextureTerrain);
+extern ECS_TAG_DECLARE(TextureBuildings);
+extern ECS_TAG_DECLARE(TextureEntities);
 
 typedef struct TilePosition {
     BzTile x;
@@ -32,6 +33,20 @@ extern ECS_COMPONENT_DECLARE(Size);
 extern ECS_COMPONENT_DECLARE(TargetPosition);
 extern ECS_COMPONENT_DECLARE(MoveForce);
 
+typedef enum ResourceType {
+    RES_IRON,
+    RES_WOOD,
+    RES_GOLD,
+    RES_FOOD,
+    RES_COUNT,
+} ResourceType;
+
+typedef struct Resource {
+    ResourceType type;
+    i32 amount;
+} Resource;
+extern ECS_COMPONENT_DECLARE(Resource);
+
 typedef BzSpatialGridID SpatialGridID;
 extern ECS_COMPONENT_DECLARE(SpatialGridID);