工程CAD基础与应用 教学课件 ppt 作者 杨松林 于奕峰 主编10第十单元-2.pptVIP

第十单元 Autolisp编程（二）;学习一个键槽程序;(defun c:jc () (setq p0 (getpoint 键槽第一圆心点:)) (setq p1 (getpoint \n键槽第二圆心点:)) (setq bj (getreal “\n圆半径:)) (setq wd (getreal \n线宽:)) (setq ld (distance p0 p1)) (setq ang (angle p0 p1)) (setq p2 (polar p0 (+ (* 0.5 pi) ang) bj)) (setq p3 (polar p1 (+ (* 0.5 pi) ang) bj)) (setq p4 (polar p1 (+ (* -0.5 pi) ang) bj)) (setq p5 (polar p0 (+ (* -0.5 pi) ang) bj)) (command pline p2 w wd wd p3 a p4 l p5 a cl) );学习几个lisp函数;学习一个多点十字线程序;学习一个同心园程序;(defun c:txy () (setq p0 (getpoint \n同心圆园心:)) (setq dd t) (while dd (setq r (getreal \n园的半径:)) (command circle p0 r) (if (= r ) (setq dd nil) (setq dd t) ) ) (princ) );学习一个任意角度平行线程序;(defun c:pxx () (setq p0 (getpoint 起点:)) (setq p1 (getpoint p0 \n终点:)) (setq d (getreal \n平行线间距:)) (setq ang (angle p0 p1)) (setq p2 (polar p0 (- ang (* 0.5 pi)) (* 0.5 d))) (setq p3 (polar p1 (- ang (* 0.5 pi)) (* 0.5 d))) (setq p4 (polar p0 (+ ang (* 0.5 pi)) (* 0.5 d))) (setq p5 (polar p1 (+ ang (* 0.5 pi)) (* 0.5 d))) (initget P L) (setq ss (getkword \nPline/Line:)) (if (= ss “P) (progn (setq wd (getreal \n线宽:)) (command pline p2 w wd wd p3 “ pline p4 p5 ) ) (command line p2 p3 line p4 p5 ) ) )