Code Red > AutoLISP (Vanilla / Visual)

Edit LISP to find geometric center and ignore duplicates in a list.

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osa:
Hi, I am still in the process of learning AUTOLISP, and would like to edit some script.  Recently I asked a question on autodesk and someone gave me this code which I am grateful for. but I have been trying to edit it for the past few days.

 

basically it selects a polyline, finds intersection points with the polyline and selected objects, then places text at points of intersection

 

the problem is

1- many times the polyline intersects twice with an object, so it places two text objects

2-  the text should be at the geometric center of the polyline or block if necessary to transform it.

i really have tried and it was too complex for my level .. any help would be truly appreciated.






--- Code - Auto/Visual Lisp: ---(vl-load-com) (defun c:IntersNumbering ( / LM:intersections p s l o z e)    (or *in-n* (setq *in-n* 0))    ;; Intersections  -  Lee Mac ;; Returns a list of all points of intersection between two objects ;; for the given intersection mode.  ;; ob1,ob2 - [vla] VLA-Objects ;;     mod - [int] acextendoption enum of intersectwith method    (defun LM:intersections ( ob1 ob2 mod / lst rtn )    (if      (and        (vlax-method-applicable-p ob1 'intersectwith)         (vlax-method-applicable-p ob2 'intersectwith)         (setq lst (vlax-invoke ob1 'intersectwith ob2 mod)              )             )      (repeat        (/ (length lst) 3)        (setq rtn (cons (list (car lst) (cadr lst) (caddr lst)) rtn)              lst (cdddr lst))))    (reverse rtn))    ; ======================================================================================================      (if (and (setq p (car (entsel "\nSelect a polyline: ")                                      );car                        );setq           (princ "Select intersecting polylines and blocks, ")                      (setq s (ssget '((0 . "LWPOLYLINE,LINE,INSERT"))))            (or (ssdel p s) t)           (setq *in-n* (cond ((setq f (getint (strcat "\nStart with <" (itoa (1+ *in-n*)) ">: ")))                               (1- f))                              (*in-n*)))                      (setq o (vlax-ename->vla-object p))           (setq l '()                 z (getvar 'textsize))           );and    (repeat (setq i (sslength s))      (setq e (vlax-ename->vla-object (ssname s (setq i (1- i))))            l (append (LM:intersections o e acextendnone) l))))    (and l       (setq l (vl-sort l '(lambda (p1 p2) (< (vlax-curve-getdistatpoint p p1) (vlax-curve-getdistatpoint p p2)))))       (foreach p l (entmake (list (cons 0 "TEXT") (cons 10 p) (cons 40 z) (cons 1 (itoa (setq *in-n* (1+ *in-n*))))))))    (princ)  )

It's Alive!:
Welcome OSA

I moved your question to the lisp section  :-)

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