(defun c:5js(/ oce os angb angd en I en_data en_type cenpt rad o1 o2 o3 o4 o5 i1 i2 i3 i4 i5 rad1)" J4 n, c# P: ?; l* G6 B R
(setq oce (getvar "cmdecho")) ;命令行回显状态
# G% h e# s+ u7 e+ y7 L6 b: V (setvar "cmdecho" 0) ;命令行不回显6 K5 I6 n3 S5 A
(setq os (getvar "osmode")) ;捕捉方式5 Q; {3 n6 ]0 g
(setvar "osmode" 0) ; 取消捕捉,如果不取消,图形会显示不正确% }& `3 h, Z P x8 s$ {: B
(setq angb (getvar "angbase" )) ;取角度起始方向
, u+ m9 J k; I; | (setq angd (getvar "angdir" )) ;取角度旋转方向
, B5 k+ N1 x1 j8 A (setvar "angbase" 0.0) ;x轴(东)为0
% n; }, \; ?* Q, V (setvar "angdir" 0) ;逆时针为正9 Y+ {, ?7 K! e: \
(setq en (entsel "\n选取内部生成五角星的圆:"))- c: Y' J% Q. T3 Q3 c
(setq I 0) ;记数器3 W( V6 X- O, V
(while en5 P- s; o; }; D; B0 z5 o5 r
(setq en_data (entget (car en))) ;选对象( R8 _7 Q5 E8 l$ R% g* {% P
(setq en_type (cdr (assoc 0 en_data))) ;群码0为参数类别" n( E& a0 V' e
(if (= en_type "CIRCLE") ;如为圆
9 Z8 t5 ?+ b$ y. Y (progn
! G$ [3 @+ U0 U, e9 z$ y/ Y7 ]2 ] (setq cenpt (cdr (assoc 10 en_data))) ;取得中心点* c1 L7 y/ N Z; c6 T
(setq rad (cdr (assoc 40 en_data))) ;取得半径
( p' A1 }$ ^9 H( g! \/ T4 \ (setq o1 (polar cenpt (/ pi 2) rad)) ;外部五个点
, c6 L5 x7 B' w8 c$ c y0 d K- D (setq o2 (polar cenpt (/ (* 18 pi) 180) rad)) F6 t0 ?/ u6 m
(setq o3 (polar cenpt (/ (* -54 pi) 180) rad))1 G' @9 `2 r* Q3 n* ^ c2 @
(setq o4 (polar cenpt (/ (* -126 pi) 180) rad))
0 y2 i8 I# W/ I! u$ t+ y (setq o5 (polar cenpt (/ (* 162 pi) 180) rad))
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/ t/ ~( H: |( m (setq rad1 (* rad (- (sin (/ (* 54 pi) 180)) ;内部五个点距离圆心距离为rad12 A8 y5 f( R% X/ d8 @) d2 k# J
(* (cos (/ (* 54 pi) 180))
/ h+ ~! X5 A, y$ U (/ (sin (/ (* 36 pi) 180)) ;这行及下行只是求36度正切值
4 B' w" \5 }$ h- M& I+ F2 w (cos (/ (* 36 pi) 180))! s8 c9 Z/ S# O9 w" J
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)
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) ;rad赋值完毕. w' {5 F# C+ L- |9 I5 u
(setq i1 (polar cenpt (/ (* 54 pi) 180) rad1)) ;内部五个点9 D* B6 J+ ]' [( `% w* G y, d
(setq i2 (polar cenpt (/ (* -18 pi) 180) rad1))
$ w, W/ k; ~7 w6 A$ G9 V6 ?8 k (setq i3 (polar cenpt (/ pi -2) rad1))
9 f# y8 I( @5 j2 j6 { (setq i4 (polar cenpt (/ (* -162 pi) 180) rad1))8 h, G' S6 C- [3 R4 y4 T
(setq i5 (polar cenpt (/ (* 126 pi) 180) rad1))) z3 H: w. r+ C- D7 u7 h
;五角形外形,用pline使之成为整体; C- ~$ C6 c' w
(command "pline" o1 "w" 0 0 i1 o2 i2 o3 i3 o4 i4 o5 i5 "c") . a, y" a2 F# R& C4 s
(command "line" o1 i3 "") ;五角内部五条直线
0 y- j! _+ ?) g& H8 W8 | (command "line" o2 i4 "" )/ n* G% B+ n7 M) J
(command "line" o3 i5 "")3 `, E4 {8 F/ x) J- h9 Q
(command "line" o4 i1 "")
# O% Q3 G" `; v' Z (command "line" o5 i2 ""): O" G: [$ U' b5 ~. B
(setq I (1+ I)) ;每完成一个,记数器加1
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(alert "该对象并不是圆,请重新选取圆") ;非圆时提醒6 ?+ F5 @9 I# i- O9 X k+ M- Q
) ;end if
$ e! k$ `/ p& ] (setq en (entsel "\n 选取下一个内部生成五角星的圆:")) ;重新选取) P" W6 @, J2 n3 o
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0 P9 X8 z7 Y$ p3 a0 l8 Q (princ (strcat "\n共绘制了"(itoa i) "个圆内接五角星"))
- w4 ?7 h" B/ g (setvar "osmode" os) ;回原捕捉模式
2 b/ i4 ?/ M! t0 B$ x4 b (setvar "cmdecho" oce) ;回命令行回显示状态
6 x' x. R) C$ a3 A9 S1 x1 y* S (setvar "angbase" angb) ;返回角度初始
/ @# b. N+ R# E8 U I (setvar "angdir" angd) ;返回角度旋转方向) {( b) o: Y Y8 u2 E( h# s7 a5 e
(princ)! P5 a+ [' _$ [0 v
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(prompt "\n<<5js>>连续多个圆内接五角星,by孟宪林:[email protected]")2 O4 N: V' z" x Q% h: r
(prin1) |