/***************************************************/
public static Output <Point, Point> CurveProximity(this PolyCurve curve1, PolyCurve curve2, double tolerance = Tolerance.Distance)
{
Output <Point, Point> result = curve2.ICurveProximity(curve1.Curves[0]);
Output <Point, Point> cp = new Output <Point, Point>();
for (int i = 1; i < curve1.Curves.Count; i++)
{
cp = curve1.Curves[i].ICurveProximity(curve2);
if (cp.Item1.Distance(cp.Item2) < result.Item1.Distance(result.Item2))
{
result = cp;
}
}
return(result);
}