private void RenderHandler(object sender, FrameEventArgs e) { GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.StencilBufferBit | ClearBufferMask.DepthBufferBit); var lookAtMatrix = Matrix4.LookAt(Eye, CameraAt, Up); GL.MatrixMode(MatrixMode.Modelview); GL.LoadMatrix(ref lookAtMatrix); DrawObjectsByStage(); Context.SwapBuffers(); }