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  1. #1
    Senior Member
    AutoCAD 2011
    Join Date
    Jan 2014

    Default extracting Easting Northing from a polyline

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    I have a polyline and I'd like to extract the easting northing coordinates at 1 meter interval, is it possible to do that?

    ps no LIST command

    I need to extract a point every meter

    many thanks!

  2. #2
    Quantum Mechanic BIGAL's Avatar
    Civil 3D 2016
    Join Date
    Dec 2005


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    Its a very simple task there is a vl function vlax-curve-getpointatdist which does just that. This can be expanded out to use with other objects like circle, arc & line, all in one routine.

    (defun ptsatdist ( / obj dist distx pt)
      (setq obj (vlax-ename->vla-object (car (entsel "\nPick object"))))
      (setq dist 1.0)
      (setq distx dist)
      (if (/= (setq len (vla-get-length obj)) nil)
          (repeat (fix  (/ len dist))
          (princ "\n")
          (setq pt (vlax-curve-getpointatdist obj distx))
           (setq distx (+ distx dist))
           (princ (strcat (rtos distx 2 0) " X= " (rtos (car pt) 2 2) " Y= " (rtos (cadr pt) 2 2)))
    A man who never made mistakes never made anything

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