a) debug Camera Matrices. enable with _IRR_COMPILE_WITH_90_DEGREE_CAMERA.

- allow ICameraSceneNode to accept any values and correct in buildCameraLookAtMatrixLH with normalize_camera_direction.
 if disabled defaults to the current v1.9 normalize
b) add initial Rotation to MayaCamera Constructor default 0,0
c) switchToMayaCamera in Examples. Clones FPSCamera default disabled


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6366 dfc29bdd-3216-0410-991c-e03cc46cb475

examples/11.PerPixelLighting/main.cpp

@@ -212,6 +212,8 @@ int main()
 	// disable mouse cursor
 	device->getCursorControl()->setVisible(false);
 
+	switchToMayaCamera(device);
+
 	/*
 	Because we want the whole scene to look a little bit scarier, we add
 	some fog to it. This is done by a call to IVideoDriver::setFog(). There