DIVAREA Autocad Lisp

7/26/2019 DIVAREA Autocad Lisp

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;;;DIVAREA.LSP ver 2.0 Plot division utility (metric units)

;;; by Yorgos Angelopoulos

;;; [email protected]

;;;

;;; Suppose that you have to split a big part into 2, 3, 4 (even works for 5.014)

;;; or you want to cut a smaller part out of the parent one.

;;;

;;; All you need is a CLOSED polyline to define the parent part.

;;;

;;; Load the utility, after placing it into an appropriate folder,

;;; let's say \Program Files\Acad2000\Support, invoke "APPLOAD" command

;;; or invoke (LOAD"DIVAREA") and run it by entering DIVAREA.

;;;

;;;

;;; For proper execution please note that:

;;;

;;; 1. The area which is enclosed by the poly must be FREE of

;;; entities which could cause unexpected behaviour of the BOUNDARY

;;; command (this command is the key to the solution). ERASE ALL lines,

;;; polylines, circles, etc. inside the lwpoly. Text, nodes and attribs

;;; may not interfere with the BOUNDARY command

;;;

;;; 2. The DIVISION LINE must CROSS THE BOUNDARY polyline,

;;; is imaginary, you MUST NOT draw it, let the routine draw it,

;;; just indicate its endpoints

;;; (you may have to draw auxilliary entities BEFORE you start DIVAREA)

;;;



;;; 3. Bear in mind that this DIVISION LINE will be rotated (or be offseted) and

;;; neither of its endpoints should be inside the boundary, at

;;; any moment, or else the result will be unexpected.

;;;

;;; 4. An easy way to help things going, is to indicate the two

;;; end-points as FAR OUT from the boundary as possible, not exceeding

;;; of course, your current visibe area.

;;;

;;; 5. The only exception is for the FIXED POINT, in case that

;;; you prefer "F" rather than "P" as an answer in the relevant question.

;;; Fixed point must be ON or OUTSIDE the polyline, NEVER INSIDE.

;;;

;;; 6. Next, pick a point into the part which will obtain the desired

;;; area. You have to indicate INTO it, NOT ON the boundary and AS FAR

;;; from division line as possible, so this point will not be outside of

;;; the desired part while the division line is moving towards the point.

;;;

;;; 7. Finally, you have to indicate the remaining part, exactly

;;; by the same way, FAR FROM DIVISION line and INTO the remaining piece.

;;;

;;; 8. For better area approximation you can decrease local vars

;;; stp2 and stp1 in the following program-lines accordingly.

;;;

;;;******************UTILITY STARTS HERE*******************************

(defun getver_poly (entnme / subent pllst vertex) ;;POLYLINE VERTICES LIST

(setq subent (entnext entnme))

(setq pllst '())



(while subent

(setq vertex (cdr (assoc 10 (entget subent))))

(setq pllst (append pllst (list vertex)))

(setq subent (entnext subent))

)

pllst

)

;;*********************************************************************

(defun getver_lwpoly (entnme / oldpl nodpl ptyp i n pllst) ;;LWPOLYLINE VERTICES LIST

(setq oldpl(entget entnme))

(setq nodpl(cdr(assoc 90 oldpl)))

(setq ptyp (cdr(assoc 70 oldpl)))

(setq pllst '())

(setq i 0)

(setq n 0)

(while (car(nth i oldpl))

(if (= (car(nth i oldpl)) 10)

(progn

(setq pllst (append pllst (list (cdr(nth i oldpl)))))

(setq n(+ 1 n))

);endprogn

);endif

(setq i (+ i 1))

);endwhile

(if (= ptyp 1)

(progn

(setq pllst (append pllst (list(nth 0 pllst))))



(setq pllst (cdr pllst))

);endprogn

);endif

pllst

)

;;*********************************************************************

(defun prerr (s)

(if (/= s "Function cancelled")

(princ (strcat "\nError: " s))

);endif

(setq *error* olderr)

(princ)

);close defun

;;*********************************************************************

(Defun C:DIVAREA (/ osm strpf strdc ex arxent arx arxon pllst k scl ok

d p1 p2 pta pts ptb deln ar par tem

stp stp1 stp2

)

(setq olderr *error*

*error* prerr)

(setq osm(getvar "osmode"))

(setvar "osmode" 0)

(setvar "cmdecho" 0)

(setq ex 0

stp 0.10

stp1 0.05

stp2 0.005



)

(setq arxent (car(entsel "\nSelect a CLOSED polyline : "))

arx (entget arxent)

arxon (cdr (assoc -1 arx))

)

(if (not

(and

(or

(equal (cdr(assoc 0 arx)) "LWPOLYLINE")

(equal (cdr(assoc 0 arx)) "POLYLINE")

)

(= (cdr(assoc 70 arx)) 1)

)

)

(progn

(princ "\nSORRY, ONLY CLOSED POLYLINES ALLOWED...")

(setq ex 1)

)

)

(if (= ex 0)

(progn

(command "_undo" "m") ;if something goes bad, you may return here

(if (equal (cdr(assoc 0 arx)) "LWPOLYLINE")

(setq pllst (getver_lwpoly arxent))

(setq pllst (getver_poly arxent))

)

(command "_layer" "m" "Area_Division" "")



(command "_area" "e" arxon)

(setq ar(getvar "area"))

(initget "Divide Cut" 1)

(setq strdc(getkword "\nDIVIDE by number or CUT a part ? (D/C) :"))

(if (= strdc "Divide")

(progn

(setq k (getreal "\nEnter number to divide the whole part by : "))

(setq tem(/ ar k))

)

(setq tem (getreal "\nEnter area to cut from the whole part (m2) : "))

)

(initget "Parallel Fixed" 1)

(setq strpf(getkword "\nPARALLEL to a direction or FIXED side? (P/F) :"))

(if (= strpf "Fixed")

(fixpt)

(parpt)

)

)

(ready)

)

)

;******************************************************************************

(defun fixpt ()

(setvar "osmode" osm)

(setq scl 0.05

p1 (getpoint "\nPick fixed point of the division line - OUTSIDE of boundary: ")

p2 (getpoint p1 "\nPick second point of division line - must completly CROSS boundary: ")



)

(setvar "osmode" 0)

(command "_line" p1 p2 "")

(setq deln (entlast))

(setq pts (getpoint "\nPick any point into the REST of the piece, FAR from division line - INSIDE ofboundary: "))

(setq ptb (getpoint "\nPick any point into the FIRST piece, FAR from division line - INSIDE ofboundary: "))

(setvar "blipmode" 0)

(princ "\nPlease wait...")

(command "_boundary" pts "")

(command "_area" "e" "l")

(setq par(getvar "area"))

(setq ok -1)

(if (< par tem)

(progn

(while (< par tem)

(entdel (entlast))

(if (< (- tem par) 50)(setq scl stp))

(if (< (- tem par) 10)(setq scl stp2))

(command "_rotate" deln "" p1 (* scl ok))



(if (< (getvar "area") par)

(setq ok(* ok -1))

)


);endwhile



(entdel deln)

)

(progn

(while (> par tem)

(entdel (entlast))

(if (< (- par tem) 50)(setq scl stp))

(if (< (- par tem) 10)(setq scl stp2))

(command "_rotate" deln "" p1 (* scl ok))



(if (> (getvar "area") par)

(setq ok(* ok -1))

)


);endwhile

(entdel deln)

)

)

(command "_change" "l" "" "p" "c" "green" "")

(command "_boundary" ptb "")

(command "_change" "l" "" "p" "c" "red" "")

(ready)

)

;******************************************************************************

(defun parpt ()


(setq scl 0.25



p1 (getpoint "\nPick one point of division line (far from lwpoly) : ")

p2 (getpoint p1 "\nPick other point of division line (far from lwpoly) : ")

)

(setvar "osmode" 0)

(command "_line" p1 p2 "")

(setq deln(entlast))

(setq pta (getpoint "\nPick any point into the FIRST piece, FAR from division line - INSIDE ofboundary: "))

(setq pts (getpoint "\nPick any point into the REST of the piece, FAR from division line - INSIDE ofboundary: "))

(setq ptb (getpoint "\nPick any point from the REST of the piece, FAR from division line - OUTSIDE ofboundary: "))


(princ "\nPlease wait...")




(if (< par tem)

(progn

(while (< par tem)

(entdel (entlast))



(command "_offset" scl deln ptb "")

(entdel deln)







)

(entdel deln)

)

(progn

(while (> par tem)

(entdel (entlast))



(command "_offset" scl deln ptb "")

(entdel deln)





)

(entdel deln)

)

)

(command "_change" "l" "" "p" "c" "green" "")

(command "_boundary" pta "")

(command "_change" "l" "" "p" "c" "red" "")

(ready)

)

;******************************************************************************

(defun ready ()

(princ scl)

(princ "\nActual : ")



(princ par)

(princ "\nMust be: ")

(princ tem)

(setq *error* olderr)


(setvar "cmdecho" 1)


(princ "\nThanks...")

(princ)

);close defun

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DIVAREA Autocad Lisp