public static Shape2 Rotate(this Shape2 shape, Vector2 center, double angle)
{
var m = Rotates2.Rotate(angle);
return(shape.Transform(p => center + m * (p - center)));
}
public static Shape2 Rotate(this Shape2 shape, double angle)
{
var m = Rotates2.Rotate(angle);
return(shape.Transform(p => m * p));
}