public void OnRenderFrame(object s, FrameEventArgs e)
{
var angle = Utility.DegreesToRadians((DateTime.Now.Millisecond / 1000.0f + DateTime.Now.Second) * 6 * 4);
var cam = new Vector3((float)System.Math.Sin(angle), 0.0f, (float)System.Math.Cos(angle));
var look = new Vector3(0, 300, 0);
cam *= 1600.0f;
cam.y += 100.0f;
_camera.LookAt(look);
_camera.Position = cam + look;
}