큐브추가, 카메라 오빗팅 추가

Source/MainScene.h

@@ -65,10 +65,21 @@ public:
     ~MainScene() override;
 
 private:
+    void updateCameraPosition();
+
     GameState _gameState                            = GameState::init;
     ax::EventListenerTouchAllAtOnce* _touchListener = nullptr;
     ax::EventListenerKeyboard* _keyboardListener    = nullptr;
     ax::EventListenerMouse* _mouseListener          = nullptr;
     int _sceneID                                    = 0;
+
+    // Camera Orbit State
+    ax::Camera* _camera3D = nullptr;
+    ax::Vec3 _targetPos = ax::Vec3::ZERO;
+    float _pitch = 45.0f; // degrees
+    float _yaw = 45.0f;   // degrees
+    float _distance = 25.0f;
+    bool _isMouseDown = false;
+    ax::Vec2 _lastMousePos = ax::Vec2::ZERO;
 };