Topic: points on line?

[cadplayer]

Hello all!

I wish to can get all polyline vertex- and intersection points on line from 3dPolyline.
First I ask the polyline if it have "VERTEX"

Code: [Select]

(setq en (car (entsel "\nSelect Polyline ")))
(while (and (setq en (entnext en))
            (setq edata (entget en))
            (=(cdr(assoc 0 edata))"VERTEX")
            )
  )

  )Intersection points from terrain points (Gpt) to my ployline (vl-en) I get

Code: [Select]

(defun _sect ()
  (vlax-curve-getClosestPointTo vl-en Gpt)
  )

The vertex points I get with

Code: [Select]

(defun _polyV (en /)
  (cdr (assoc 10 edata))
  )
My Question: How can I get all points in a order
(pList '((vertex1 x y z) (vertex2 x y z) (section1 x y z) (section2 x y z) (vertex3 x y z) (section3 x y z) (vertex4 x y z) (section4 x y z)....))

[Stefan]

Just a guess...

Code - Auto/Visual Lisp: [Select]

1. (vl-sort
2.   (append vertex_list section_list)
3.   (function
4.     (lambda (x y)
5.       (<
6.         (vlax-curve-GetDistAtPoint vl-en x)
7.         (vlax-curve-GetDistAtPoint vl-en y)
8.       )
9.     )
10.   )
11. )

[cadplayer]

thanks that was answer of my question

[Kerry]

Be aware that vl-sort may remove duplicate data ... so you may have issues if you expect all points will be retained.

[cadplayer]

That is okay.
Now I have a problem how I build function if I have diffrent lists in section_list and vertex_list
but alway is coordinates in second position

section_list
(("S" 152747.0 6.4086e+006 72.3828) ("S" 152752.0 6.4086e+006 72.3091) ("S" 152770.0 6.40863e+006 72.1742) ("S" 152774.0 6.40863e+006 72.1143) ("S" 152786.0 6.40866e+006 71.9021))

vertex_list
(("S" 152747.0 6.4086e+006 72.3828 "A" -4.19779) ("S" 152752.0 6.4086e+006 72.3091 "A" -1.95332) ("S" 152770.0 6.40863e+006 72.1742 "A" 0.722905) ("S" 152774.0 6.40863e+006 72.1143 "A" -2.4611) ("S" 152786.0 6.40866e+006 71.9021 "A" 9.32426))


I try it with a sub-function but finally I don´t know to get a

Code: [Select]

(defun xxx (y)
   (foreach L y
     (setq D (vlax-curve-GetDistAtPoint vl-en (list (cadr L) (caddr L) (cadddr L))))
     (setq liste (cons D liste))
     )
   )

Code: [Select]

vl-sort (xxx section_list) '<

vl-sort (xxx vertex_list) '<


So I get two list with distance
But I want one list with "S"coordinates  and "A"area sort by distance D

Can somebody help me.

[Lee Mac]

This?

Code - Auto/Visual Lisp: [Select]

1. (vl-sort (append section_list vertex_list)
2.     (function
3.         (lambda ( a b )
4.             (< (vlax-curve-getdistatpoint vl-en (list (cadr a) (caddr a) (cadddr a)))
5.                (vlax-curve-getdistatpoint vl-en (list (cadr b) (caddr b) (cadddr b)))
6.             )
7.         )
8.     )
9. )

[cadplayer]

Thanks Lee that I was not trying to do.

[Lee Mac]

Thanks Lee that I was not trying to do.

Did I misunderstand?

[CAB]

I'm confused. 

[Kerry]

I'm confused. 

Hi, I'm phred.

[cadplayer]

Sorry my English is very bad, I mean it was answer to my problem. It was not easy to find a solution and Lee was very fast. Thanks for helping