Can we get the segment type from Polyline2d and Polyline3d using C# ?

[Anonymous]

In Polyline, we have the GetSegmentType:

public static void GetPolylineSegment(Polyline pline){
   Point3d p3d;
   SegmentType stype;
   int vn = pline.NumberOfVertices;
   for (int i = 0; i < vn; i++){
      p3d = pline.GetPoint3dAt(i);
      segmentType = pline.GetSegmentType((int)pline.GetParameterAtPoint(p3d));
      if (segmentType == SegmentType.Arc) {
         // find an arc segment
      }
      else if (segmentType == SegmentType.Line) {
         // find a line segment
      }
      // ...
   }
}

Polyline2d and Polyline3d doesn't have the same method, so is there a workaround to deal with ?

[pendean]

You need to post in the proper customization forum: http://forums.autodesk.com/t5/autocad-customization/ct-p/AutoCADTopic1

[Kent1Cooper]

The Customization Forum would be better, but in the meantime....

If I understand what you're asking, one thing you can do [I know how to do it in AutoLISP, but I couldn't say whether it can be done in that programming language], that works on either lightweight or heavy Polylines, is to apply Object Snap CENTER at the pick point.  If it returns anything, you've picked on an arc segment, otherwise on a line segment.  Temporarily set the APERTURE System Variable to be the same size as the PICKBOX, to avoid the possibility of catching some other nearby thing that happens to have a Center.

But I would point out that there's no need to make a determination for segment type on 3DPolylines, which can't have arc segments [unless, of course, you don't know what kind of object you're picking on when you pick it, in which case the above approach will appropriately determine for a 3DPolyline that you picked on a line segment].