public static Point3d?GetOrthoNormalPoint(this Arc arc, Point3d point, bool nullForOutOfRange = true)
{
point = point.OrthoProject(arc.GetPlane());
CircularArc3d arc3d = arc.ConvertToCircularArc();
Vector3d central = point - arc3d.Center;
PointOnCurve3d pointOn = null;
try
{
pointOn = arc3d.GetNormalPoint(point, Tolerance.Global);
}
catch (InvalidOperationException)
{
if (nullForOutOfRange)
{
return(null);
}
else
{
if ((point - arc3d.StartPoint).Length < (point - arc3d.EndPoint).Length)
{
return(arc3d.StartPoint);
}
else
{
return(arc3d.EndPoint);
}
}
}
if (pointOn != null)
{
return(pointOn.Point);
}
return(null);
}