;https://www.caduser.ru/forum/topic30797.html
;| ! *******************************************************************
;; !                  lib:IsPtInView
;; ! *******************************************************************
;; ! Проверяет находится ли точка в видовом экране
;; ! Auguments: 'pt'  — Точка для анализа в МСК!!!
;; ! Return   : T или nil если 'pt' в видовом экране или нет
;; ! *******************************************************************|;
(defun lib:IsPtInView (pt / VCTR Y_Len SSZ X_Pix Y_Pix X_Len Lc Uc)
(setq pt (trans pt 0 1))
(setq VCTR (getvar "VIEWCTR") Y_Len (getvar "VIEWSIZE")
   SSZ (getvar "SCREENSIZE")
   X_Pix (car SSZ) Y_Pix (cadr SSZ)
   X_Len (* (/ X_Pix Y_Pix) Y_Len)
   Lc (polar VCTR (dtr 180.0) (* 0.5 X_Len))
   Uc (polar Lc 0.0 X_Len)
   Lc (polar Lc (dtr 270.0) (* 0.5 Y_Len))
   Uc (polar Uc (dtr 90.0) (* 0.5 Y_Len)))
(if (and (> (car pt) (car Lc))(< (car pt) (car Uc))
   (> (cadr pt) (cadr Lc))(< (cadr pt) (cadr Uc)))
  T nil))
(defun DTR (a)(* pi (/ a 180.0)))
(defun RTD (a)(/ (* a 180.0) pi))
; ! ***********************************************************
;; !                             lib:Zoom2Lst
;; ! **********************************************************
;; ! Function : Zoom границ списка точек
;; ! Arguments: 'vlist' — Список точек в МСК!!!!
;; ! Зуммирует экран, чтобы все точки были видны
;; ! Returns  : t — было зуммирование nil — нет
;; ! **********************************************************
(defun lib:Zoom2Lst( vlist / bl tr Lst OS)
;(setq *MIP-ZOOM-PREV* nil)
(setq  Lst (lib:pt_extents vlist)
  bl (car Lst) tr (cadr Lst))
(if (not (and (lib:IsPtInView bl) (lib:IsPtInView tr)))
(progn  (setq OS (getvar "OSMODE"))(setvar "OSMODE" 0)
  (command "_.Zoom" "_Window" (trans bl 0 1)(trans tr 0 1)
    "_.Zoom" "0.95x")
 ;       (setq *MIP-ZOOM-PREV* 2)
  (setvar "OSMODE" OS)
  T) NIL))
;| ! ***************************************************************************
;; !           lib:pt_extents
;; ! ***************************************************************************
;; ! Function : Возвращает границы MIN, MAX X,Y,Z списка точек
;; ! Argument : 'vlist' — Список точек
;; ! Returns  : Список точек (ЛевНижн ПравВерхн)
;; ! ***************************************************************************|;
(defun  lib:pt_extents (vlist / tmp)
(setq tmp (mapcar '(lambda (x) (vl-remove-if 'null x))
 (mapcar '(lambda (what) (mapcar '(lambda (x) (nth what x)) vlist))
 '(0 1 2))));_setq
  (list (mapcar '(lambda(x)(apply 'min x)) tmp)(mapcar '(lambda(x)(apply 'max x)) tmp)));_defun
;https://www.caduser.ru/forum/topic30797.html
;Block Contour
(defun C:BC ( / *error* blk obj MinPt MaxPt hiden pt pl unnamed_block adoc tmp_blk adoc blks lays lay oname sel csp loc sc ec ret)
(defun *error* ( msg )(mapcar '(lambda(x)(vla-put-Visible x :vlax-true)) hiden)
  (vla-endundomark adoc)(if (and tmp_blk (vlax-write-enabled-p tmp_blk)(not(vlax-erased-p tmp_blk)))(vla-Erase tmp_blk))
  (foreach x loc (vla-put-lock x :vlax-true)))
(vl-load-com)
(if (zerop (getvar "WORLDUCS"))(progn(vl-cmdf "_.UCS" "")(vl-cmdf "_.Plan" "")))
(setq adoc (vla-get-ActiveDocument (vlax-get-acad-object))
        blks (vla-get-blocks adoc)
        lays (vla-get-layers adoc))
  (vla-startundomark adoc)(princ "\nВыберите объекты для построения контура")
 (if (setq sel (ssget))
    (progn
    (setq sel (mapcar 'vlax-ename->vla-object(vl-remove-if 'listp (mapcar 'cadr (ssnamex sel)))))
    (setq csp (vla-objectidtoobject adoc (vla-get-ownerid (car sel))))
    (setq unnamed_block (vla-add (vla-get-blocks adoc)(vlax-3d-point '(0. 0. 0.)) "*U"))
    (foreach x sel
        (setq oname (strcase (vla-get-objectname x))
              lay  (vla-item lays (vla-get-layer x)))
        (if (= (vla-get-lock lay) :vlax-true)
          (progn (vla-put-lock lay :vlax-false) (setq loc (cons lay loc))))
      (cond ((member oname '("ACDBVIEWPORT" "ACDBATTRIBUTEDEFINITION")) nil)
        ((= oname "ACDBBLOCKREFERENCE")
         (vla-InsertBlock unnamed_block
           (vla-get-insertionpoint x)(vla-get-name x)
           (vla-get-xscalefactor x)(vla-get-yscalefactor x)
           (vla-get-zscalefactor x)(vla-get-rotation x))
         (setq blk (cons x blk)))
        (t (setq obj (cons x obj))))
      );_foreach
        (setq lay  (vla-item lays (getvar "CLAYER")))
        (if (= (vla-get-lock lay) :vlax-true)(progn (vla-put-lock lay :vlax-false) (setq loc (cons lay loc))))
     (if obj (progn
         (vla-copyobjects
              (vla-get-activedocument (vlax-get-acad-object))
              (vlax-make-variant
                (vlax-safearray-fill
                  (vlax-make-safearray vlax-vbobject (cons 0 (1- (length obj))))
                  obj
          )
              )
              unnamed_block
            )
     )
       )
    (setq obj (append obj blk))
    (if obj (progn
          (setq tmp_blk (vla-insertblock csp (vlax-3d-point '(0. 0. 0.))(vla-get-name unnamed_block) 1.0 1.0 1.0 0.0))
          (vla-GetBoundingBox tmp_blk 'MinPt 'MaxPt)  ;_Границы блока
               (setq MinPt (vlax-safearray->list MinPt)
                     MaxPt (vlax-safearray->list MaxPt)
                     MinPt (mapcar '- MinPt '(10 10))
                     MaxPt (mapcar '+ MaxPt '(10 10)))
           (lib:Zoom2Lst (list MinPt MaxPt))
           (setq sset (ssget "_C" MinPt MaxPt))
(if sset (progn
      (setq hiden (mapcar 'vlax-ename->vla-object(vl-remove-if 'listp (mapcar 'cadr (ssnamex sset))))
        hiden (vl-remove tmp_blk hiden))
      (mapcar '(lambda(x)(vla-put-Visible x :vlax-false)) hiden)
      (setq pt (mapcar '+ MinPt '(5 5)))
      (vl-cmdf "_.RECTANG" (trans MinPt 0 1)(trans MaxPt 0 1))
      (setq pl (vlax-ename->vla-object(entlast)))
      (setq sc (1-(vla-get-count csp)))
      (if (VL-CATCH-ALL-ERROR-P (VL-CATCH-ALL-APPLY '(lambda ()
         (vl-cmdf "_-BOUNDARY" (trans pt 0 1) "")
              (while (> (getvar "CMDACTIVE") 0)(command "")))))
      (princ "\nНе удалось построить контур"))
      (setq ec (vla-get-count csp))
        (while (< sc ec)
      (setq ret (append ret (list (vla-item csp sc)))
        sc(1+ sc)))
      (setq ret (vl-remove pl ret))
      (mapcar '(lambda (x)(vla-Erase x)(vlax-release-object x))
          (list pl tmp_blk))
      (setq ret (mapcar '(lambda ( x / mipt)
         (vla-GetBoundingBox x 'MiPt nil)  ;_Границы блока
                 (setq MiPt (vlax-safearray->list MiPt))
         (list MiPt x)) ret))
      (setq ret (vl-sort ret '(lambda (e1 e2)(< (distance MinPt (car e1))(distance MinPt (car e2))))))
      (setq pl (nth 1 ret) ret (vl-remove pl ret))(mapcar 'vla-erase (mapcar 'cadr ret))
      (mapcar '(lambda(x)(vla-put-Visible x :vlax-true)) hiden)
      (foreach x loc (vla-put-lock x :vlax-true))
      (if pl (progn
      (initget  "Yes No")
      (if (= (getkword "\nУдалять объекты? [Yes/No] <No> : ") "Yes")
         (mapcar '(lambda (x) (if (vlax-write-enabled-p x)(vla-Erase x))) obj)))
    (princ "\nНе удалось построить контур"))
     ))))
     (VL-CATCH-ALL-APPLY '(lambda ()(mapcar 'vlax-release-object
    (list unnamed_block tmp_blk csp blks lays))))
     )
   );_if not
  (foreach x loc (vla-put-lock x :vlax-true))
  (vla-endundomark adoc)(vlax-release-object adoc)(princ))
(princ "\nНаберите в командной строке BC")