请教前辈两线交点问题

lisperado

wyl219 发表于 2019-10-27 13:29
请问瞬态是什么?

1.短暂显示命令：
VSLIDE

2.最常见getpoint也具有自带瞬态功能

2. (defun c:tt ()
   
3. (and (setq p1 (getpoint "\n第一点 " ))
   
4. (setq p2 (getpoint p1 "\n第二点 " ))
   
5. )
   
6. (princ)
   
7. )
   

(defun c:tt ()<br /> (and (setq p1 (getpoint "\n第一点 " ))<br /> (setq p2 (getpoint p1 "\n第二点 " ))<br /> )<br /> (princ)<br /> )<br />

如果拿掉 p1
(setq p2 (getpoint "\n第二点" ))
就没那种UI体验了

3.函数请看
grdraw
grvecs
redraw
瞬态效果常用于grread