Swap yaw and pitch in camera computation. Add functions to convert view matrix to camera position, and camera position to camera yaw pitch roll.

examples/RollingFrictionDemo/RollingFrictionDemo.cpp

@@ -59,10 +59,10 @@ public:
 	void resetCamera()
 	{
 		float dist = 35;
-		float pitch = 0;
-		float yaw = 14;
+		float pitch = -14;
+		float yaw = 0;
 		float targetPos[3]={0,0,0};
-		m_guiHelper->resetCamera(dist,pitch,yaw,targetPos[0],targetPos[1],targetPos[2]);
+		m_guiHelper->resetCamera(dist,yaw,pitch,targetPos[0],targetPos[1],targetPos[2]);
 	}
 	
 };