Generate Boundary Line By Selecting Intersecting lines

August 28, 2018

Here is a simple 'proof-of-concept' routine.

Please change the dis value to suit your plans.

Explode the inserts that have resulted from using the _Measure command. If you use a unique layer for the nested line the temporary objects can later easily be selected and erased.

And make sure to zoom in on the selection.

(defun KGA_Conv_Pickset_To_ObjectList (ss / i ret)
  (if ss
    (repeat (setq i (sslength ss))
      (setq ret (cons (vlax-ename->vla-object (ssname ss (setq i (1- i)))) ret))
    )
  )
)

(defun KGA_Geom_MidPoint (pt1 pt2)
  (mapcar '/ (mapcar '+ pt1 pt2) '(2.0 2.0 2.0))
)

(defun CreateBorder (fronObj backObj sideObj / dis fronPt backPt)
  (setq dis 1.0) ; Change value to for example 1/10th of average width of lot.
  (if
    (and
      (setq fronPt (vlax-invoke fronObj 'intersectwith sideObj acextendnone))
      (= 3 (length fronPt))
      (setq backPt (vlax-invoke backObj 'intersectwith sideObj acextendnone))
      (= 3 (length backPt))
    )
    (progn
      (command
        "_.bpoly"
        "_non"
        (polar
          (KGA_Geom_MidPoint fronPt backPt)
          (+ (angle fronPt backPt) (* 0.5 pi))
          dis
        )
        ""
      )
    )
  )
)

(defun c:Test ( / backObj doc fronObj sideObjLst ss)
  (setq doc (vla-get-activedocument (vlax-get-acad-object)))
  (vla-endundomark doc)
  (vla-startundomark doc)
  (if
    (and
      (setq fronObj (car (entsel "\nFront edge of lots: ")))
      (setq backObj (car (entsel "\nBack edge of lots: ")))
      (princ "\nSide edges of lots: ")
      (setq ss (ssget '((0 . "LINE"))))
    )
    (progn
      (setq
        fronObj (vlax-ename->vla-object fronObj)
        backObj (vlax-ename->vla-object backObj)
        sideObjLst (KGA_Conv_Pickset_To_ObjectList ss)
      )
      (setvar 'cmdecho 0)
      (foreach sideObj sideObjLst
        (CreateBorder fronObj backObj sideObj)
      )
      (setvar 'cmdecho 1)
    )
  )
  (vla-endundomark doc)
  (princ)
)

Edited August 28, 2018 by Roy_043

August 28, 2018

On 8/27/2018 at 4:32 PM, loudy000 said:

no worries see attached if you want to have a look at it. Cheers!

Enclosed polylines.LSP

Let's see if we can pimp that one

On 8/27/2018 at 11:00 AM, Stefan BMR said:

You can try the Enclosed Polylines.lsp from here.

Hi Stefan! Very clever piece of coding there! I'm not sure if the version loody attached is your latest version, but I noticed that the 1rst line makes the 2nd line bomb. (*acDoc* is define on the 1rst line while the 2nd uses an undefined variable acDoc).

Now, lets see what I can do with it with some matrix functions kindly made available by Vladimir Nesterovsky, Doug Wilson and Gile... (Merci Gilles. Tu es un mentor et une source d'inspiration même à une distance de probablement plusieurs fuseaux horaires!)

Not bad, heh?

On 8/21/2018 at 11:00 AM, loudy000 said:

That's awesome but too expensive

Soooo! If 14$ is too expensive, tell us how much you think would be a fair price? (ie not too expensive....). I'm wondering how much our time is worth to someone who will get the credit for an increased productivity. At least a "like" I hope.
Enjoy

(defun dupfromins (ent parentlst / tmpnam tmplst newitm); duplst and ss as global here, local to c:ecl
  ;ent is insert
  ;(eq "INSERT" (cdr (assoc 0 (entget ent))))
  ;Jef! 2018-08-28
  (if (null parentlst) (setq parentlst (cons ent parentlst)))
  (setq ent (tblobjname "block" (cdr (assoc 2 (entget ent)))))
  (while (setq ent (entnext ent))
         (cond ((member (setq tmpnam (cdr(assoc 0 (setq tmplst (entget ent))))) '("LINE" "LWPOLYLINE" "ARC" "CIRCLE"))
                (vla-transformby
                  (vlax-ename->vla-object
                    (setq newitm
                      (entmakex
                        (append (vl-remove-if '(lambda (x) (member (car x) '(-1 330 5))) tmplst) (list (cons 410(getvar 'ctab))))
                      )
                    )
                  )
                  (vlax-tmatrix (get-tmatrix parentlst))
                )
                ;(setq duplst (cons (vlax-ename->vla-object newitm) duplst))
                (setq duplst (cons newitm duplst))
                (ssadd newitm ss)
               )
               ((eq "INSERT" tmpnam)
                (dupfromins ent (cons ent parentlst))
               )
         )
  )
)
;;;;;;;;
;helper functions to the helper function ^^


;; Get-TMatrix (gile)
;; Retourne une matrice de transformation (4X4) identique à celle retournée par nentselp
;;
;; Argument
;; lst : (liste de ENAME) la liste des entités "parents" de la plus imbriqué à celle
;; insérée dans l'espace courant -indentique à (last (nentsel)) ou (last (nentselp))

(defun get-tmatrix (lst / mat pt geom)
  (setq	mat (Imat 3)
	pt  '(0.0 0.0 0.0)
  )
  (while lst
    (setq geom (refgeom (car lst))
	  mat  (mxm (car geom) mat)
	  pt   (mapcar '+ (mxv (car geom) pt) (cadr geom))
	  lst  (cdr lst)
    )
  )
  (append
    (mapcar '(lambda (v x) (append v (list x))) mat pt)
    (list '(0.0 0.0 0.0 1.0))
  )
)

;; IMAT
;; Crée une matrice d'identité de dimension n
;;
;; Argument
;; n : la dimension de la matrice

(defun Imat (d / i n r m)
  (setq i d)
  (while (<= 0 (setq i (1- i)))
    (setq n d r nil)
    (while (<= 0 (setq n (1- n)))
      (setq r (cons (if (= i n) 1.0 0.0) r))
    )
    (setq m (cons r m))
  )
)

;; Apply a transformation matrix to a vector by Vladimir Nesterovsky
;; Arguments: a 3X3 matrix and a vector
;; Return : the vecor transformed by the matrix

(defun mxv (m v)
  (mapcar '(lambda (r) (apply '+ (mapcar '* r v))) m)
)

;; TRP
;; transpose une matrice -Doug Wilson-
;;
;; Argument : une matrice

(defun trp (m) (apply 'mapcar (cons 'list m)))

;; MXM
;; Multiple (combine) deux matrices -Vladimir Nesterovsky-
;;
;; Arguments : deux matrices

(defun mxm (m q)
  (mapcar '(lambda (r) (mxv (trp q) r)) m)
)

;; RefGeom (gile)
;; Retourne une liste dont le premier élément est une matrice de transformation
;; (rotation, échelles, normale) de dimension 3X3 et le second le point
;; d'insertion de l'objet dans son "parent" (xref, bloc ou espace)

(defun RefGeom (ename / elst ang norm mat)
  (setq	elst (entget ename)
	ang  (cdr (assoc 50 elst))
	norm (cdr (assoc 210 elst))
  )
  (list
    (setq mat
	   (mxm
	     (mapcar (function (lambda (v) (trans v 0 norm T)))
		     '((1.0 0.0 0.0) (0.0 1.0 0.0) (0.0 0.0 1.0))
	     )
	     (mxm
	       (list (list (cos ang) (- (sin ang)) 0.0)
		     (list (sin ang) (cos ang) 0.0)
		     '(0.0 0.0 1.0)
	       )
	       (list (list (cdr (assoc 41 elst)) 0.0 0.0)
		     (list 0.0 (cdr (assoc 42 elst)) 0.0)
		     (list 0.0 0.0 (cdr (assoc 43 elst)))
	       )
	     )
	   )
    )
    (mapcar
      '-
      (trans (cdr (assoc 10 elst)) norm 0)
      (mxv mat
	   (cdr (assoc 10 (tblsearch "BLOCK" (cdr (assoc 2 elst)))))
      )
    )
  )
)

;;;;;;;;;;;;;;
;main function

(defun c:ECL ( / *error* i lst ms r1 reg ss sysvar prop duplst)
  ;modified by Jef! on 2018-08-28 to also work with blocks
  ;warning: doesnt verify if block inserts are uniformaly scaled
  ;but who uses non uniformaly scaled blocks anyway? :)
  (or acDoc (setq acDoc (vla-get-activedocument (vlax-get-acad-object))))
  (setq ms (vlax-get acDoc (if (= 1 (getvar 'cvport)) 'paperspace 'modelspace)))
  (vla-startundomark acDoc)
  (setq pa (getvar 'peditaccept)
        dr (getvar 'draworderctl)
        ce (getvar 'cmdecho)
        aa 0.00
  )
  
  (defun *error* (msg)
    (and
      msg
      (not (wcmatch (strcase msg) "*CANCEL*,*QUIT*,*EXIT*"))
      (princ (strcat "\nError: " msg))
      )
    (foreach x segments (vla-delete x))
    (setvar 'peditaccept pa)
    (setvar 'draworderctl dr)
    (setvar 'cmdecho ce)
    (vla-endundomark acDoc)
    (princ)
    )
  (defun l2p (l) (if l (cons (list (car l) (cadr l) (caddr l)) (l2p (cdddr l)))))
  
  (defun break_object (e points / object_type start center end radius normal arc res)
    (if points
      (progn
        (setq points
          (vl-sort points
            (function
              (lambda (a b)
                (<
                  (vlax-curve-getdistatpoint e a)
                  (vlax-curve-getdistatpoint e b)
                )
              )
            )
          )
        )
        (cond
          ((eq (setq object_type (vla-get-ObjectName e)) "AcDbLine")
           (setq start (vlax-curve-getstartpoint e))
           (while points
             (if (> (distance start (car points)) 1e-8)
               (setq res (cons (vlax-invoke ms 'addline start (setq start (car points))) res))
               )
             (setq points (cdr points))
             )
           )
          (T
           (if
             (eq object_type "AcDbArc")
             (setq start  (vlax-curve-getStartParam e))
             (setq start  (vlax-curve-getparamatpoint e (car points))
                   points (reverse (cons (car points) (reverse (cdr points))))
             )
           )
           (setq   center (vla-get-Center e)
                   radius (vla-get-Radius e)
                   normal (vla-get-Normal e)
           )
           (while points
             (if (not (equal start (setq end (vlax-curve-getparamatpoint e (car points))) 1e-8))
               (progn
                 (setq arc (vla-AddArc ms center radius start end))
                 (vla-put-Normal arc normal)
                 (setq res (cons arc res))
               )
             )
             (setq points (cdr points)
                   start end)
             )
           )
         )
       )
     )
    res
  )
         
  (if
    (setq ss (ssget ":L" '((0 . "LINE,LWPOLYLINE,ARC,CIRCLE,INSERT"))));added insert (Jef!)
    (progn
      (repeat (setq i (sslength ss));added by Jef!
        (setq i (1- i)
              e (ssname ss i)
              )
        (if (eq "INSERT" (cdr (assoc 0 (entget e))))
            (progn
              (dupfromins e nil)
              (ssdel e ss)
              )
          )
        
      );end added by Jef!
      (repeat (setq i (sslength ss))
        (setq i (1- i)
              e (ssname ss i)
              e (vlax-ename->vla-object e)
              )
        (if
          (eq (vla-get-ObjectName e) "AcDbPolyline")
          (foreach x (vlax-invoke e 'Explode)
            (setq lst (cons x lst))
            )
          (setq lst (cons (vla-copy e) lst))
        )
      )
      (if
        (setq segments
          (apply 'append
            (mapcar
              (function
                (lambda (e / l)
                  (break_object e
                    (progn
                      (foreach other (vl-remove e lst)
                        (foreach x (l2p (vlax-invoke e 'intersectwith other acExtendNone))
                           (setq l (cons x l))
                        )
                      )
                      (if
                        (eq (vla-get-ObjectName e) "AcDbCircle")
                        l
                        (cons (vlax-curve-getendpoint e) l)
                      )
                    )
                  )
                )
              )
              lst
            )
          )
        )
        (progn
          (setq reg (vlax-invoke ms 'AddRegion segments))
          (foreach x (append segments lst) (vla-delete x))
          (setvar 'peditaccept 1)
          (setvar 'draworderctl 0)
          (setvar 'cmdecho 0)
          (foreach x reg
            (setq x (vlax-vla-object->ename x))
            (command "_explode" x)
            (command "_pedit" "_m" "_p" "" "_j" "" "")
            (if (> (vlax-curve-getArea (entlast)) aa) (setq aa (vlax-curve-getArea (setq ea (entlast)))))
            )
          (if (> (length reg) 1) (entdel ea))
          (if duplst (mapcar 'entdel duplst));added by Jef!
          (setvar 'peditaccept pa)
          (setvar 'draworderctl dr)
          (setvar 'cmdecho ce)
        )
        (princ "\nValid region(s) not found")
      )
    )
  )
  (vla-endundomark acDoc)
  (princ)
)

Cheers!

August 29, 2018

46 minutes ago, Jef! said:

Let's see if we can pimp that one

Hi Stefan! Very clever piece of coding there! I'm not sure if the version loody attached is your latest version, but I noticed that the 1rst line makes the 2nd line bomb. (*acDoc* is define on the 1rst line while the 2nd uses an undefined variable acDoc).

Now, lets see what I can do with it with some matrix functions kindly made available by Vladimir Nesterovsky, Doug Wilson and Gile... (Merci Gilles. Tu es un mentor et une source d'inspiration même à une distance de probablement plusieurs fuseaux horaires!)

Not bad, heh?

Soooo! If 14$ is too expensive, tell us how much you think would be a fair price? (ie not too expensive....). I'm wondering how much our time is worth to someone who will get the credit for an increased productivity. At least a "like" I hope.
Enjoy


(defun dupfromins (ent parentlst / tmpnam tmplst newitm); duplst and ss as global here, local to c:ecl
  ;ent is insert
  ;(eq "INSERT" (cdr (assoc 0 (entget ent))))
  ;Jef! 2018-08-28
  (if (null parentlst) (setq parentlst (cons ent parentlst)))
  (setq ent (tblobjname "block" (cdr (assoc 2 (entget ent)))))
  (while (setq ent (entnext ent))
         (cond ((member (setq tmpnam (cdr(assoc 0 (setq tmplst (entget ent))))) '("LINE" "LWPOLYLINE" "ARC" "CIRCLE"))
                (vla-transformby
                  (vlax-ename->vla-object
                    (setq newitm
                      (entmakex
                        (append (vl-remove-if '(lambda (x) (member (car x) '(-1 330 5))) tmplst) (list (cons 410(getvar 'ctab))))
                      )
                    )
                  )
                  (vlax-tmatrix (get-tmatrix parentlst))
                )
                ;(setq duplst (cons (vlax-ename->vla-object newitm) duplst))
                (setq duplst (cons newitm duplst))
                (ssadd newitm ss)
               )
               ((eq "INSERT" tmpnam)
                (dupfromins ent (cons ent parentlst))
               )
         )
  )
)
;;;;;;;;
;helper functions to the helper function ^^


;; Get-TMatrix (gile)
;; Retourne une matrice de transformation (4X4) identique à celle retournée par nentselp
;;
;; Argument
;; lst : (liste de ENAME) la liste des entités "parents" de la plus imbriqué à celle
;; insérée dans l'espace courant -indentique à (last (nentsel)) ou (last (nentselp))

(defun get-tmatrix (lst / mat pt geom)
  (setq	mat (Imat 3)
	pt  '(0.0 0.0 0.0)
  )
  (while lst
    (setq geom (refgeom (car lst))
	  mat  (mxm (car geom) mat)
	  pt   (mapcar '+ (mxv (car geom) pt) (cadr geom))
	  lst  (cdr lst)
    )
  )
  (append
    (mapcar '(lambda (v x) (append v (list x))) mat pt)
    (list '(0.0 0.0 0.0 1.0))
  )
)

;; IMAT
;; Crée une matrice d'identité de dimension n
;;
;; Argument
;; n : la dimension de la matrice

(defun Imat (d / i n r m)
  (setq i d)
  (while (<= 0 (setq i (1- i)))
    (setq n d r nil)
    (while (<= 0 (setq n (1- n)))
      (setq r (cons (if (= i n) 1.0 0.0) r))
    )
    (setq m (cons r m))
  )
)

;; Apply a transformation matrix to a vector by Vladimir Nesterovsky
;; Arguments: a 3X3 matrix and a vector
;; Return : the vecor transformed by the matrix

(defun mxv (m v)
  (mapcar '(lambda (r) (apply '+ (mapcar '* r v))) m)
)

;; TRP
;; transpose une matrice -Doug Wilson-
;;
;; Argument : une matrice

(defun trp (m) (apply 'mapcar (cons 'list m)))

;; MXM
;; Multiple (combine) deux matrices -Vladimir Nesterovsky-
;;
;; Arguments : deux matrices

(defun mxm (m q)
  (mapcar '(lambda (r) (mxv (trp q) r)) m)
)

;; RefGeom (gile)
;; Retourne une liste dont le premier élément est une matrice de transformation
;; (rotation, échelles, normale) de dimension 3X3 et le second le point
;; d'insertion de l'objet dans son "parent" (xref, bloc ou espace)

(defun RefGeom (ename / elst ang norm mat)
  (setq	elst (entget ename)
	ang  (cdr (assoc 50 elst))
	norm (cdr (assoc 210 elst))
  )
  (list
    (setq mat
	   (mxm
	     (mapcar (function (lambda (v) (trans v 0 norm T)))
		     '((1.0 0.0 0.0) (0.0 1.0 0.0) (0.0 0.0 1.0))
	     )
	     (mxm
	       (list (list (cos ang) (- (sin ang)) 0.0)
		     (list (sin ang) (cos ang) 0.0)
		     '(0.0 0.0 1.0)
	       )
	       (list (list (cdr (assoc 41 elst)) 0.0 0.0)
		     (list 0.0 (cdr (assoc 42 elst)) 0.0)
		     (list 0.0 0.0 (cdr (assoc 43 elst)))
	       )
	     )
	   )
    )
    (mapcar
      '-
      (trans (cdr (assoc 10 elst)) norm 0)
      (mxv mat
	   (cdr (assoc 10 (tblsearch "BLOCK" (cdr (assoc 2 elst)))))
      )
    )
  )
)

;;;;;;;;;;;;;;
;main function

(defun c:ECL ( / *error* i lst ms r1 reg ss sysvar prop duplst)
  ;modified by Jef! on 2018-08-28 to also work with blocks
  ;warning: doesnt verify if block inserts are uniformaly scaled
  ;but who uses non uniformaly scaled blocks anyway? :)
  (or acDoc (setq acDoc (vla-get-activedocument (vlax-get-acad-object))))
  (setq ms (vlax-get acDoc (if (= 1 (getvar 'cvport)) 'paperspace 'modelspace)))
  (vla-startundomark acDoc)
  (setq pa (getvar 'peditaccept)
        dr (getvar 'draworderctl)
        ce (getvar 'cmdecho)
        aa 0.00
  )
  
  (defun *error* (msg)
    (and
      msg
      (not (wcmatch (strcase msg) "*CANCEL*,*QUIT*,*EXIT*"))
      (princ (strcat "\nError: " msg))
      )
    (foreach x segments (vla-delete x))
    (setvar 'peditaccept pa)
    (setvar 'draworderctl dr)
    (setvar 'cmdecho ce)
    (vla-endundomark acDoc)
    (princ)
    )
  (defun l2p (l) (if l (cons (list (car l) (cadr l) (caddr l)) (l2p (cdddr l)))))
  
  (defun break_object (e points / object_type start center end radius normal arc res)
    (if points
      (progn
        (setq points
          (vl-sort points
            (function
              (lambda (a b)
                (<
                  (vlax-curve-getdistatpoint e a)
                  (vlax-curve-getdistatpoint e b)
                )
              )
            )
          )
        )
        (cond
          ((eq (setq object_type (vla-get-ObjectName e)) "AcDbLine")
           (setq start (vlax-curve-getstartpoint e))
           (while points
             (if (> (distance start (car points)) 1e-8)
               (setq res (cons (vlax-invoke ms 'addline start (setq start (car points))) res))
               )
             (setq points (cdr points))
             )
           )
          (T
           (if
             (eq object_type "AcDbArc")
             (setq start  (vlax-curve-getStartParam e))
             (setq start  (vlax-curve-getparamatpoint e (car points))
                   points (reverse (cons (car points) (reverse (cdr points))))
             )
           )
           (setq   center (vla-get-Center e)
                   radius (vla-get-Radius e)
                   normal (vla-get-Normal e)
           )
           (while points
             (if (not (equal start (setq end (vlax-curve-getparamatpoint e (car points))) 1e-8))
               (progn
                 (setq arc (vla-AddArc ms center radius start end))
                 (vla-put-Normal arc normal)
                 (setq res (cons arc res))
               )
             )
             (setq points (cdr points)
                   start end)
             )
           )
         )
       )
     )
    res
  )
         
  (if
    (setq ss (ssget ":L" '((0 . "LINE,LWPOLYLINE,ARC,CIRCLE,INSERT"))));added insert (Jef!)
    (progn
      (repeat (setq i (sslength ss));added by Jef!
        (setq i (1- i)
              e (ssname ss i)
              )
        (if (eq "INSERT" (cdr (assoc 0 (entget e))))
            (progn
              (dupfromins e nil)
              (ssdel e ss)
              )
          )
        
      );end added by Jef!
      (repeat (setq i (sslength ss))
        (setq i (1- i)
              e (ssname ss i)
              e (vlax-ename->vla-object e)
              )
        (if
          (eq (vla-get-ObjectName e) "AcDbPolyline")
          (foreach x (vlax-invoke e 'Explode)
            (setq lst (cons x lst))
            )
          (setq lst (cons (vla-copy e) lst))
        )
      )
      (if
        (setq segments
          (apply 'append
            (mapcar
              (function
                (lambda (e / l)
                  (break_object e
                    (progn
                      (foreach other (vl-remove e lst)
                        (foreach x (l2p (vlax-invoke e 'intersectwith other acExtendNone))
                           (setq l (cons x l))
                        )
                      )
                      (if
                        (eq (vla-get-ObjectName e) "AcDbCircle")
                        l
                        (cons (vlax-curve-getendpoint e) l)
                      )
                    )
                  )
                )
              )
              lst
            )
          )
        )
        (progn
          (setq reg (vlax-invoke ms 'AddRegion segments))
          (foreach x (append segments lst) (vla-delete x))
          (setvar 'peditaccept 1)
          (setvar 'draworderctl 0)
          (setvar 'cmdecho 0)
          (foreach x reg
            (setq x (vlax-vla-object->ename x))
            (command "_explode" x)
            (command "_pedit" "_m" "_p" "" "_j" "" "")
            (if (> (vlax-curve-getArea (entlast)) aa) (setq aa (vlax-curve-getArea (setq ea (entlast)))))
            )
          (if (> (length reg) 1) (entdel ea))
          (if duplst (mapcar 'entdel duplst));added by Jef!
          (setvar 'peditaccept pa)
          (setvar 'draworderctl dr)
          (setvar 'cmdecho ce)
        )
        (princ "\nValid region(s) not found")
      )
    )
  )
  (vla-endundomark acDoc)
  (princ)
)

Cheers!

There you go it’s 3:26am here and can’t help but open my pc to test your code . This is pretty decent mate! Ah forget about the price I’m really just a poor guy

Thanks again

August 29, 2018

Hello Jef,
that is a very useful code. Thank you!
I work a lot with Xline. Could you install them in the code?

Many Thanks
Martin

August 4, 2019

hey @Jef!. it’s been a while, hope all is good.. thank you for this great code! it works great however im facing problem and if i have overlapping lines. is there a way to you ignore overlapping and continue to produce closed polyline? thank you very much .

Edited August 4, 2019 by loudy000

August 5, 2019

BEST IS : 1. MAKE HATCH BY PICK INTERNAL POINT.

2. SELECT ALL HATCH AND RIGHT CLICK GENERATE BOUNDARY. AND DELETE ALL HATCH.

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Generate Boundary Line By Selecting Intersecting lines

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