private void CreateFromButton_OnClick(object sender, RoutedEventArgs e)
{
var perspectiveCamera = new PerspectiveCamera()
{
Position = new Point3D(50, 50, 200),
LookDirection = new Vector3D(-50, -50, -200),
UpDirection = new Vector3D(0, 1, 0)
};
_selectedCamera.CreateFrom(perspectiveCamera);
}