- treballant en colisió en Z

source/actor.cpp

@@ -23,6 +23,19 @@ namespace actor
         return act;
     }
 
+    const bool check_2d_collision(actor_t *obj1, actor_t *obj2)
+    {
+        return  (obj1->pos.x                 < obj2->pos.x + obj2->size.x) &&
+                (obj1->pos.x + obj1->size.x  > obj2->pos.x               ) &&
+                (obj1->pos.y                 < obj2->pos.y + obj2->size.y) &&
+                (obj1->pos.y + obj1->size.y  > obj2->pos.y               );
+    }
+
+    const bool is_above(actor_t *obj1, actor_t *obj2)
+    {
+        return check_2d_collision(obj1, obj2) && (obj1->pos.z==obj2->pos.z+obj2->size.z);
+    }
+
     void setDirty(actor_t *act, const bool force)
     {
         if (act->prev==nullptr && act != first && !force) return;