Reinventing the wheel, or how to found the closest vertex of polyline?

[DeZert]

I keep asking simple questions..

I have a point on polyline (not vertex!) as Point3D, and I need to find closest vertex of polyline.

In other words, I put a points on the polyline, and they should not be located closer than 50 meter vertices of the polyline. For this I need to find closest vertex to point.

Previously sorry for my wrong English )

[_gile · Accepted solution]

Hi,

If the input point is on the polyline, you can get its parameter (double).

Parameters of polylines are integer on vertices, so it's easy to get the closest vertex.

Point3d closestVertex = 
    pline.GetPointAtParam(Math.Round(pline.GetParamAtPoint(inputPoint)));

[DeZert]

Very thanks!