;;  SubDivide.lsp [command name: SD] ;;  To SubDivide a finite linear object into a specified ;;    number of equal-length contiguous sections. ;;  Works on anything of finite length that Break can ;;    be used on [not Xlines or Rays]. ;;  Kent Cooper, October 2009 ; (defun C:SD (/ *error* subdiv obj cmde blips osm esel ent etype entlen secs seclen ent2 secs1 secs2) ;  (defun *error* (errmsg)    (if (not (wcmatch errmsg "Function cancelled,quit / exit abort"))      (princ (strcat "\nError: " errmsg))    ); end if    (setvar 'osmode osm)    (setvar 'blipmode blips)    (command "_.undo" "_end")    (setvar 'cmdecho cmde)  ); end defun *error* ;  (defun subdiv (obj brks)    (repeat brks      (command        "_.break"        obj        (trans (vlax-curve-getPointAtDist obj seclen) 0 1)        "@"      ); end command      (setq obj (entlast))    ); end repeat  ); end defun - subdiv ;  (setq cmde (getvar 'cmdecho))  (setvar 'cmdecho 0)  (command "_.undo" "_begin")  (setq    blips (getvar 'blipmode)    osm (getvar 'osmode)  ); end setq ;  (while    (not      (and        (setq esel (ssget ":S" '((0 . "LINE,ARC,CIRCLE,*POLYLINE,ELLIPSE,SPLINE"))))        (= (cdr (assoc 70 (tblsearch "layer" (cdr (assoc 8 (entget (ssname esel 0))))))) 0); 0 for Unlocked, 4 for Locked      ); end and    ); end not    (prompt "\nNothing selected, or object is not a finite path type, or is on a Locked Layer; try again:")  ); end while  (setvar 'osmode 0)  (setvar 'blipmode 0)  (initget 7)  (setq    ent (ssname esel 0)    etype (if ent (cdr (assoc 0 (entget ent))))    entlen (vlax-curve-getDistAtParam ent (vlax-curve-getEndParam ent))    secs (getint "\nNumber of Sections to SubDivide into: ")    seclen (/ entlen secs)  ); end setq ;  (command "_.divide" ent secs) ; remove leading ; if Points are desired along with subdivision  (cond    ( ; Circle or closed Ellipse/Spline [can't break at one point]      (or        (= etype "CIRCLE")        (and (wcmatch etype "ELLIPSE,SPLINE") (vlax-curve-isClosed ent))      ); end or      (command "_.copy" ent "" "0,0" "0,0"); make a copy in place      (setq        ent2 (entlast)        secs1 (/ secs 2)        secs2 (- secs secs1)      ); end setq      (command        "_.break"        ent        (trans (vlax-curve-getStartPoint ent) 0 1)        (trans (vlax-curve-getPointAtDist ent (* seclen secs1)) 0 1)        "_.break"        ent2        (trans (vlax-curve-getPointAtDist ent2 (* seclen secs1)) 0 1)        (trans (vlax-curve-getStartPoint ent2) 0 1)      ); end command      (subdiv ent (1- secs2))      (subdiv ent2 (1- secs1))    ); end Circle or closed Ellipse/Spline condition    (T ; everything else      (subdiv ent (1- secs))    ); end everything-else condition  ); end cond ;  (setvar 'osmode osm)  (setvar 'blipmode blips)  (command "_.undo" "_end")  (setvar 'cmdecho cmde)  (princ) ); end defun (prompt "Type SD to SubDivide a linear object.")