basic movement

include/state/gamestate.hpp

@@ -2,6 +2,7 @@
 
 #include <vector>
 #include <memory>
+#include <functional>
 #include <utils.hpp>
 #include <object/entity.hpp>
 #include <mutex>
@@ -18,6 +19,10 @@ namespace Game::State {
                 fn(mEntities);
             }
 
+            void sort(); // Sort entities by zIndex for correct rendering order
+            Object::Entity* getEntityByName(const std::string& name); // Get an entity by name, returns nullptr if no entity with the name exists
+            std::vector<Object::Entity*> getEntitiesSnapshot(bool sortByZIndex = false); // Get a stable snapshot of entity pointers for iteration outside the lock
+
             // Update entity at index, by REFERENCE.
             Object::Entity* getAtIndex(size_t at);
             // Add an entity to the gamestate.