void CompositionTarget_Rendering(object sender, object e)
{
scene.isphong = isphong == true?true:false;
scene.isblinn = isblinn == true ? true : false;
scene.camera = new Vector3(camera[0, 0], camera[1, 0], camera[2, 0]);
DateTime now = DateTime.Now;
double FPS = 1000 / (now - previousTime).TotalMilliseconds;
previousTime = now;
fps.Content = ((int)FPS).ToString() + "FPS";
scene.Clear(255, 255, 255, 255);
object3D[0].Rotation = new Vector3(object3D[0].Rotation[0], object3D[0].Rotation[1] + 0.001, object3D[0].Rotation[2]);
scene.Render(camera, object3D);
scene.Present();
}