Topic: [XDrX-PlugIn(7)] Subtract two color blocks (HATCH,REGION,MPOLYGON)

[xdcad]

The code written in the forum is mainly to demonstrate the usage of the main functions to be introduced. There may be a better or direct way to implement it.

The following code mainly introduces the AcGe geometry library function and uses the MPOLYGON object to Subtract the HATCH,MPOLYGON,REGION entities.(any combination)

Code - Auto/Visual Lisp: [Select]

1. (defun c:XDTB-Subtract (/ e1 e2)
2.   ;| Use the AcGe geometry library to determine whether it intersects|;
3.   (defun _hasInterPnts (e1 e2 / g1 g2 intv ret)
4.     (setq ret
5.            (and (setq g1 (xdrx-getpropertyvalue e1 "rootloopat" 0))
6.                 (setq g2 (xdrx-getpropertyvalue e2 "rootloopat" 0))
7.                 (setq intv (xdge::getpropertyvalue g1 "getinterval" g2))
8.            )
9.     )
10.     (xdrx-object-release g1 g2 intv)
11.     ret
12.   )
13.   (if (and
14.         (setq e1 (car (xdrx-entsel "\nSelect main color block<Exit>:"'((0 . "HATCH,REGION,MPOLYGON")))))
15.         (xdrx-pickset-redraw e1 3)
16.         (setq e2 (car (xdrx-entsel "\nSelect the color blocks to be Subtract.<Exit>:" '((0 . "HATCH,REGION,MPOLYGON")))))
17.         (not (eq e1 e2))
18.       )
19.     (progn
20.       (xdrx-begin)
21.       (if (_hasInterPnts e1 e2)
22.         (progn
23.           (xdrx-get-subtract e1 e2)
24.  
25.           (xdrx-prompt "\nTwo color blocks were successfully Subtract.")
26.         )
27.       )
28.       (xdrx-end)
29.     )
30.   )
31.   (princ)
32. )
33.