png支持

include/config.hpp

@@ -15,6 +15,7 @@ struct WindowConfig {
 
 struct MeshConfig {
     std::string shape = "quad";
+    std::string texture;
     std::array<float, 4> color{0.5F, 0.5F, 0.5F, 1.0F};
 };
 
@@ -33,9 +34,19 @@ struct InputBindingConfig {
     std::vector<int> mouse_buttons;
 };
 
+struct SceneConfig {
+    std::string name;
+    std::string path;
+    std::vector<ActorConfig> actors;
+};
+
 struct GameConfig {
     WindowConfig window;
     std::vector<InputBindingConfig> input_bindings;
+    std::vector<SceneConfig> scenes;
+    std::string start_scene;
+
+    // 兼容旧的单场景写法：直接写在游戏配置里的 actors。
     std::vector<ActorConfig> actors;
 };