Label only the Start and End Vertex of 3D Poly line

[karunakaran1991]

Hi

could any one help to find a solution?

I wanna label the start and end coordinates only for a 3D poly line using lisp. The 3D poly line have no of vertex points in it.

[Kent1Cooper · Accepted solution]

You can get the start and end points only with

(vl-load-com); if needed

(vlax-curve-getStartPoint YourPolylineEntityName)

(vlax-curve-getEndPoint YourPolylineEntityName)

Those will be point coordinate lists [lists of three real numbers for the XYZ coordinates].  You can convert those into Text in a variety of ways -- what did you have in mind?  And how would you want the labels positioned?  Something like middle-center-justified at the start/end vertex itself in 3D?  Or at a location to be specified by the User?

A sample drawing or image showing the result you're looking for would be helpful.

[karunakaran1991]

Hi Cooper

Thanks for your precious time.

[Kent1Cooper]

---

@karunakaran1991 wrote:

Hi Cooper

Thanks for your precious time.

---

You're welcome.  For your information, that approach will find the start and end points of not just 3DPolylines, but also 2D "heavy" and Lightweight Polylines, Lines, Arcs, Circles, Ellipses, Splines, and maybe a couple of other things.  It can also be done in other ways without the (vlax-curve-...) functions and therefore without needing to do (vl-load-com), but it would be a different way for each of those entity types, and in the case of 2D "heavy" and 3DPolylines, rather more complicated.