入门级代码
 - (defun c:tt(/ pt1 pt2 ss1 ss2 ss3)
- (setq pt1 (getpoint "\n指定起点: "))
- (setq pt2 (getcorner pt1 "\n指定对角点: "))
- (setq ss1(ssget "C" pt1 pt2)) ;选择任意对象 ,C表示交选,如果用W,表示窗选
- (setq ss2(ssget "C" pt1 pt2 '((0 . "INSERT")))) ;选择块
- (setq ss3(ssget "C" pt1 pt2 '((2 . "HfSec-*")))) ;选择指定块名的块
- (princ))
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