help to correct routine that creates closed polygon by entering 2 measurements

[cyberactive]

 Hello, I have a routine but it fails when entering the last measurement, what it does is create a closed polygon by clicking on a base point, then it asks me to enter the front side and then returns to the base point to enter the side, but when drawing i

 

(defun c:acin (/ foo _dist p1 p2 p3 ang)
  (defun foo (l)
    (entmake
      (append '((0 . "LWPOLYLINE") (100 . "AcDbEntity") (100 . "AcDbPolyline") (90 . 4) (70 . 129))
              (mapcar (function (lambda (p) (cons 10 (reverse (cdr (reverse (trans p 1 0))))))) l)
      )
    )
  )

  (defun _dist (a b) (distance (list (car a) (cadr a)) (list (car b) (cadr b))))

  (if (setq p1 (getpoint "\nPica un punto base: "))
      (progn
        (setq p2 (getpoint p1 "\nIngresa la medida del frente: "))
        (not (grdraw p1 p2 3 1))
        
        (setq p3 (getpoint p1 "\nIngresa la medida del lado desde el punto base: "))
        (if (vl-consp p3)
            (foo (list p1 p2 p3 (polar p3 (angle p2 p1) (_dist p1 p2))))
          (if (eq (type p3) 'STR)
              (progn
                (setq ang (cond
                            ((eq p3 "I") (+ (/ pi 2.) (angle p2 p1)))
                            ((eq p3 "D") (+ (* pi 1.5) (angle p2 p1)))
                          ))
                (setq p3 (polar p1 ang (getreal "\nIngresa la medida del lado desde el punto base: ")))
                (foo (list p1 p2 p3 (polar p3 (angle p2 p1) (_dist p1 p2))))
              )
          )
        )
      )
  )
  (redraw) 
  (princ)
)

 

[mhupp]

Its seems to be working for me but the rectangle is  a little lopsided.

 

 

(getpoint will only return a list so this if statement is only going to run foo.

 

(defun c:acin (/ foo _dist p1 p2 p3 ang)
  (defun foo (l)
    (entmake
      (append '((0 . "LWPOLYLINE") (100 . "AcDbEntity") (100 . "AcDbPolyline") (90 . 4) (70 . 129))
              (mapcar (function (lambda (p) (cons 10 (reverse (cdr (reverse (trans p 1 0))))))) l)
      )
    )
  )
  (defun _dist (a b) (distance (list (car a) (cadr a)) (list (car b) (cadr b))))
  (setq p1 (getpoint "\nPica un punto base: "))
  (setq p2 (getpoint p1 "\nIngresa la medida del frente: "))
  (not (grdraw p1 p2 3 1))
  (setq p3 (getpoint p1 "\nIngresa la medida del lado desde el punto base: "))
  (if (vl-consp p3)
    (foo (list p1 p2 p3 (polar p3 (angle p2 p1) (_dist p1 p2)))) ;si p3 es una lista 
    (if (eq (type p3) 'STR) ;si p3 no es una lista, ejecute esto
      (progn
        (setq ang
          (cond
            ((eq p3 "I") (+ (/ pi 2.) (angle p2 p1)))
            ((eq p3 "D") (+ (* pi 1.5) (angle p2 p1)))
          )
        )
        (setq p3 (polar p1 ang (getreal "\nIngresa la medida del lado desde el punto base: ")))
        (foo (list p1 p2 p3 (polar p3 (angle p2 p1) (_dist p1 p2))))
      )
    )
  )
  (redraw)
  (princ)
)

 

 

 

 

[cyberactive]

 

The problem is when I enter the second data it takes the final vertex and is very inclined

 

[cyberactive]

https://ibb.co/xgdk0vs

 

https://ibb.co/wM8Vc93

[cyberactive]

This is how it should look

 

https://ibb.co/Svkv7ps

[mhupp]

calculating the midpoint of p2 and p3

 

 

add this after P3
(setq mpt (mapcar '/ (mapcar '+ P2 P3) '(2 2 2)))


change foo
(foo (list p1 p2 (polar p1 (angle p1 mpt) (* (_dist p1 mpt) 2)) p3))

 

Edited February 1 by mhupp

[cyberactive]

Perfect, thank you very much mhupp.