private void CreateMouseRay3DButton_OnClick(object sender, RoutedEventArgs e)
{
Point3D rayOrigin;
Vector3D rayDirection;
bool isRayPossible = _selectedCamera.CreateMouseRay3D(new Point(100, 100), out rayOrigin, out rayDirection);
MessageBox.Show(string.Format(System.Globalization.CultureInfo.InvariantCulture,
"Calling:\r\nCreateMouseRay3D(new Point(100, 100), out rayOrigin, out rayDirection):\r\n\r\nResults:\r\nrayOrigin: {0:0.0}\r\nrayDirection: {1:0.0}",
rayOrigin, rayDirection));
// You can also use static CreateMouseRay3D that can calculate the ray with camera's viewportSize, viewMatrix and projectionMatrix:
// BaseCamera.CreateMouseRay3D(Point mousePosition, Size viewportSize, ref Matrix3D viewMatrix, ref Matrix3D projectionMatrix, out Point3D rayOrigin, out Vector3D rayDirection)
}
