minor fixing, adapting for mobile web

src/Game.h

@@ -54,21 +54,49 @@ namespace ZL {
 		MenuManager menuManager;
 		
 	private:
-		bool rightMouseDown = false;
-		int lastMouseX = 0;
-		int lastMouseY = 0;
+		// Unified pointer handling: mouse-left and a single touch share one path.
+		// A press becomes a tap (interact / walk-to) on release if it never crossed
+		// CAMERA_DRAG_PIXEL_THRESHOLD; otherwise it becomes a camera-rotation drag.
+		// Two simultaneous touches enter pinch-zoom instead.
+		static constexpr int CAMERA_DRAG_PIXEL_THRESHOLD = 12;
+
+		struct PointerState {
+			int eventX = 0, eventY = 0;        // current raw window-pixel coords
+			int mx = 0, my = 0;                // current projection-space coords
+			int downEventX = 0, downEventY = 0;// where the press started (raw px)
+			int downMx = 0, downMy = 0;        // where the press started (proj)
+			bool capturedByUi = false;
+		};
+		std::unordered_map<int64_t, PointerState> activePointers;
+		bool hasPrimaryPointer = false;
+		int64_t primaryPointerId = 0;
+		bool cameraDragging = false;
+
+		bool pinchActive = false;
+		int64_t pinchFingerA = 0;
+		int64_t pinchFingerB = 0;
+		float pinchStartDistance = 0.0f;
+		float pinchStartZoom = 0.0f;
+
 		std::unique_ptr<AudioPlayerAsync> audioPlayer;
 
 		int64_t getSyncTimeMs();
 		void processTickCount();
 		void drawScene();
 		void drawUI();
-		
+
 		void drawLoading();
 
-		void handleDown(int64_t fingerId, int mx, int my);
-		void handleUp(int64_t fingerId, int mx, int my);
-		void handleMotion(int64_t fingerId, int mx, int my);
+		void onPointerDown(int64_t fingerId, int eventX, int eventY, int mx, int my);
+		void onPointerUp(int64_t fingerId, int eventX, int eventY, int mx, int my);
+		void onPointerMotion(int64_t fingerId, int eventX, int eventY, int mx, int my);
+
+		void enterCameraDragMode(int eventX, int eventY);
+		void exitCameraDragMode();
+		void startPinch();
+		void updatePinchZoom();
+		void endPinch();
+		int countNonUiPointers() const;
 		
 #ifdef EMSCRIPTEN
 		static Game* s_instance;