Hello everyone! Please take a look at this.

[sd2006]

Could you please take a look and explain why this Lisp program is producing this result? 27807.35m²

Please help me adjust the result. 27807.35m²

I know nothing about Lisp.

thank you .

 

(defun rh:dxf (code lst) (cdr (assoc code lst)))

(defun c:aa ( / cmde ent e_typ e_lst area vtx x_lst y_lst z_lst x_pt y_pt z_pt c_lst v_lst ss sum)
  (cond
    ( (/= 0 (getvar 'cmdecho))
      (setq cmde (getvar 'cmdecho))
      (setvar 'cmdecho 0)
    )
  )
  (while
    (setq ss (ssget "_+.:E:S"
      '((0 . "POLYLINE,LWPOLYLINE")
        (-4 . "<OR")
        (70 . 1) (70 . 3) (70 . 5)
        (-4 . "OR>")
      )
    ))
    (setq ent (ssname ss 0)
          e_typ (rh:dxf 0 (setq e_lst (entget ent)))
          area (getpropertyvalue ent "area")
          v_lst nil
    )
    (cond
      ( (= e_typ "POLYLINE")
        (setq ent (entnext ent)
              vtx (rh:dxf 10 (entget ent))
        )
        (if (< (length vtx) 3) (setq vtx (reverse (cons 0.0 (reverse vtx)))))
        (while (/= "SEQEND" (cdr (assoc 0 (entget ent))))
          (setq v_lst (cons vtx v_lst)
                ent (entnext ent)
                vtx (rh:dxf 10 (entget ent))
          )
          (if (< (length vtx) 3) (setq vtx (reverse (cons 0.0 (reverse vtx)))))
        )
        (setq x_pt (/ (apply '+ (mapcar '(lambda (x) (car x)) v_lst)) (length v_lst))
              y_pt (/ (apply '+ (mapcar '(lambda (x) (cadr x)) v_lst)) (length v_lst))
        )
        (if (= (setq sum (apply '+ (mapcar '(lambda (x) (caddr x)) v_lst))) 0.0)
          (setq z_pt 0.0)
          (setq z_pt (/ sum (length v_lst)))
        )
      )
      ( (= e_typ "LWPOLYLINE")
        (setq z_pt (rh:dxf 38 e_lst))
        (foreach pr e_lst
          (if (= (car pr) 10) (setq v_lst (cons (cdr pr) v_lst)))
        )
        (setq x_pt (/ (apply '+ (mapcar '(lambda (x) (car x)) v_lst)) (length v_lst))
              y_pt (/ (apply '+ (mapcar '(lambda (x) (cadr x)) v_lst)) (length v_lst))
        )
      )
    )
    (setq c_lst (list x_pt y_pt z_pt))
    (entmakex
      (list
        (cons 0 "MTEXT")
        (cons 100 "AcDbEntity")
        (cons 100 "AcDbMText")
        (cons 10  c_lst)
        (cons 40 (getvar 'textsize))
        (cons 71 5)
        (cons 72 5)
        (cons 1 (strcat (rtos (/ area 1000000.0) 2 2) "m²"))
; (cons 1 (rtos (/ area 1000000.0) 2 3)) ; If you don't need the suffix "m²"
      )
    )
  )
  (if cmde (setvar 'cmdecho cmde))
)

 

Edited 1 hour ago by SLW210
Added Code Tags!!

[SLW210]

Please use Code Tags for your code in the future. (press the <> in the editor toolbar)

[mhupp]

chr instead of string.

(cons 1 (strcat (rtos (/ area 1000000.0) 2 2) "m" (chr 0178)))

 

also might be the fount your using.

 

https://www.cadtutor.net/forum/topic/75383-text-ascii/#findComment-596226

Edited 1 hour ago by mhupp