public UnityMouseInputProcessor(IUnityInputHandler handler, float screenWidth, float screenHeight)
 {
     m_pan    = new MousePanGesture(handler, screenWidth, screenHeight);
     m_zoom   = new MouseZoomGesture(handler);
     m_rotate = new MouseRotateGesture(handler, screenWidth, screenHeight);
     m_tilt   = new MouseTiltGesture(handler);
     m_touch  = new MouseTouchGesture(handler);
     m_tap    = new MouseTapGesture(handler);
 }