ghl_729 发表于 2010-9-26 09:28:00

图形的多边形删除，为什么有的时候在裁剪的时候剪掉的是相反的呢

<p><font face="Verdana">;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;<br/>;;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;;多边形剪切;;裁剪内部数据<br/>;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;<br/>(defun c:ksjq()<br/>&nbsp; (command"undo" "BE")</font></p>
<p><font face="Verdana">&nbsp; (princ "\n欢迎使用快捷剪切程序，裁剪范围以内的数据！命令名：ksjq=== mdjchy 郭海录&nbsp; 2009.12.29===") <br/>&nbsp; (setq pt (getpoint "\n 指定第一点:"))<br/>&nbsp; (command "pline")<br/>&nbsp; (while pt<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (command pt)<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (setq pt (getpoint pt "\n 指定下一点（回车自动结束）:"))<br/>&nbsp;&nbsp; )<br/>&nbsp; (command "c")<br/>&nbsp; (command "osnap" "off")<br/>&nbsp; <br/>&nbsp; (command "zoom" "e" "")<br/>&nbsp;&nbsp; ;;;;;;;;;;;;;;;;裁剪;;;;;;;;;;;;;;;;;;;<br/>&nbsp;<br/>&nbsp;&nbsp; (setq ma (ssname (ssget "L") 0))<br/>&nbsp;&nbsp; (setq p0 (getpoint "\n选择范围内的任意一点:"))<br/>&nbsp;&nbsp; (command "offset" 0.2 ma p0 "")<br/>&nbsp; <br/>&nbsp;&nbsp; (setq mb (ssname (ssget "L") 0))<br/>&nbsp;&nbsp; (setq bb (entget mb))<br/>&nbsp;&nbsp; (setq d1 nil)<br/>&nbsp;&nbsp; (setq nn1 (length bb) k2 1)<br/>&nbsp;&nbsp; (while (&lt; k2 nn1)<br/>&nbsp;&nbsp;&nbsp; (if(or (= 10 (car ( nth k2 bb))) (= 11 (car ( nth k2 bb))) )<br/>&nbsp;&nbsp;&nbsp;&nbsp; (progn<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (setq x (atof (rtos (nth 1 (nth k2 bb)) 2 3)))<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (setq y (atof (rtos (nth 2 (nth k2 bb)) 2 3)))<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (setq d1 (cons (list x y) d1))<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; )<br/>&nbsp;&nbsp;&nbsp;&nbsp; )<br/>&nbsp;&nbsp;&nbsp;&nbsp; (setq k2 (+ 1 k2))<br/>&nbsp;&nbsp;&nbsp; <br/>&nbsp;&nbsp; )<br/>&nbsp;&nbsp; (setq mn1 (length d1))<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (setq km 0)<br/>&nbsp;&nbsp;&nbsp; (while (&lt;= km (- mn1 1))<br/>&nbsp;&nbsp;&nbsp;&nbsp; (progn<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (setq pt3 (nth km d1))<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (setq km1 (+ 1 km))<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (setq pt4 (nth km1 d1))<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (command "trim" ma "" "f" pt3 pt4 "" "")<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; )<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (setq km (+ 1 km))<br/>&nbsp;&nbsp;&nbsp; )<br/>&nbsp;<br/>&nbsp; (setq pt3 (nth 0 d1))<br/>&nbsp; (setq pt4 (nth (- mn1 1) d1))<br/>&nbsp; (command "trim" ma "" "f" pt3 pt4 "" "")</font></p><font face="Verdana">
<p><br/>&nbsp; ;;;;;;;;;;;;;;删除;;;;;;;;;;;;;;;;;<br/>&nbsp; (setq kn 1)<br/>&nbsp; (command "erase" "wp")<br/>&nbsp; (setq pt1 (nth 0 d1))<br/>&nbsp; (command pt1)<br/>&nbsp; (while (&lt; kn mn1)</p>
<p>&nbsp;&nbsp; <br/>&nbsp;&nbsp;&nbsp;&nbsp; (progn<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (setq pt1 (nth kn d1))<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (command pt1)<br/>&nbsp;&nbsp;&nbsp;&nbsp; ) <br/>&nbsp;&nbsp; <br/>&nbsp;&nbsp;&nbsp; (setq kn (+ 1 kn))<br/>&nbsp;&nbsp; )<br/>&nbsp; (command "" "")</p>
<p>&nbsp;</p>
<p>&nbsp;(command "erase" ma "" "")<br/>&nbsp;(command "erase" mb "" "")<br/>(command"undo" "e")</p>
<p>)</p>
<p></font>&nbsp;</p>
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