public static RadianAngle operator-(RadianAngle a, RadianAngle b)
{
RadianAngle result = new RadianAngle(0);
result.value = (float)((a.value - b.value - Math.PI) % (2 * Math.PI) + Math.PI);
return(result);
}
public static Vector2 rotate(Vector2 origin, Vector2 point, RadianAngle angle)
{
return(new Vector2((float)(origin.X + Math.Cos(angle) * (point.X - origin.X) - Math.Sin(angle) * (point.Y - origin.Y)),
(float)(origin.Y + Math.Sin(angle) * (point.X - origin.X) + Math.Cos(angle) * (point.Y - origin.Y))));
}
