private static void PositionPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ProjectionCamera target = ((ProjectionCamera)d);
target.PropertyChanged(PositionProperty);
}
private static void FarPlaneDistancePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ProjectionCamera target = ((ProjectionCamera)d);
target.PropertyChanged(FarPlaneDistanceProperty);
}