public static PointD ToCartesian(RadialPointD location, PointD origin)
{
PointD p = new PointD();
p.X = location.R * Math.Cos(location.Theta);
p.Y = location.R * Math.Sin(location.Theta);
return p + origin;
}
public static RadialPointD ToPolar(PointD location, PointD origin)
{
PointD v = location - origin;
RadialPointD n = new RadialPointD();
n.m_r = v.Magnitude();
n.m_theta = Math.Atan2(v.Y, v.X);
return n;
}