private static object AngleCoerceValue(DependencyObject d, object value)
{
Knob3D k = ((Knob3D)d);
double walkAngle = k.WalkAngle;
return(-(k.Rate * walkAngle + ((360.0 - walkAngle) / 2.0)));
}
private static void WalkAnglePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
Knob3D k = (Knob3D)d;
k.InvalidateProperty(Knob3D.AngleProperty);
}