Buildings as entities instead of map layer

game/systems/systems.c

@@ -2,6 +2,40 @@
 
 #include "../game_state.h"
 
+Rectangle calculateEntityBounds(Position pos, Size size) {
+    return (Rectangle) {
+            pos.x - size.x * 0.5f,
+            pos.y - size.x * 0.5f,
+            size.x, size.y
+    };
+}
+
+bool getEntityBounds(ecs_entity_t entity, Position *outPos, Size *outSize, Rectangle *outBounds) {
+    if (!ecs_is_alive(ECS, entity))
+        return false;
+    const Position *pos = ecs_get(ECS, entity, Position);
+    if (!pos)
+        return false;
+    const Size *size = ecs_get(ECS, entity, Size);
+    if (!size)
+        return false;
+
+    if (outPos) {
+        *outPos = *pos;
+    }
+    if (outSize) {
+        *outSize = *size;
+    }
+    if (outBounds) {
+        *outBounds = (Rectangle) {
+                pos->x - size->x * 0.5f,
+                pos->y - size->y * 0.5f,
+                size->x, size->y
+        };
+    }
+    return true;
+}
+
 ecs_entity_t renderCollidersSystem;
 ecs_entity_t renderOrientDirSystem;
 ecs_entity_t renderArmPositionSystem;
@@ -37,6 +71,7 @@ ECS_DTOR(Arms, arms, {
         ecs_delete(ECS, arms->secondary);
         arms->secondary = 0;
     }
+
 })
 ECS_MOVE(Arms, dst, src, {
    *dst = *src;