/***************************************************/
public static double ParameterAtPoint(this PolyCurve curve, Point point, double tolerance = Tolerance.Distance)
{
double sqTol = tolerance * tolerance;
double length = 0;
foreach (ICurve c in curve.SubParts())
{
if (c.IClosestPoint(point).SquareDistance(point) <= sqTol)
{
return((length + c.IParameterAtPoint(point, tolerance) * c.ILength()) / curve.ILength());
}
else
{
length += c.ILength();
}
}
return(-1);
}