在圆圈上创建蛇线

4o4osan · 发表于 2022-7-5 17:05:01

你好

希望有人能帮助我的要求。

我想用4个参数在圆上画一条多段线。

基本上，用户应该指定圆心（1）、圆半径（2）、线之间的偏移距离（3）和到折返点的距离（4）。

我能够将我的大部分想法转换成Lisp程序的语言，但有了这一点，我需要一些指导。我知道这是纯数学，但我不知道如何用交点、直线、偏移的代码来表达它。。。

BIGAL · 发表于 2022-7-5 17:39:23

其可行的方法是：首先取顶部象限pt绘制一条线，水平偏移向下直径/编号，然后使用intersectwith计算新的pt偏移向下走反向相交，等等。第二行，直线相切任何角度都一样。

考虑得再多一点，实际上需要像两个defuns一样按顺序左右运行，因为它们是两行分开的。对于左开始右结束，倍数始终为（直径/数量）*2+1。

你们有中心，所以通过简单的极坐标知道象限，只需要跟踪点交换p1=p8 p2=p5等等。当我这样做的时候，我得到一张纸，在上面画出带有pt数字的对象，这样我可以在创建时跟踪添加，然后重复就会变得明显。

copy

; look at this as a starting example of intersect with
(setvar "osmode" 512)  ; nearest make sure on line
(setq pickobj (entsel "\nPick arc :"))
(setq obj1 (vlax-ename->vla-object (car pickobj)))
(setq pickobj1 (entsel "\nPick 1st line :"))
(setq obj2 (vlax-ename->vla-object (car pickobj1)))
(setq intpt1 (vlax-invoke obj2 'intersectWith obj1 acExtendThisEntity))

marko_ribar · 发表于 2022-7-5 18:01:50

这是我的版本与凸-弧。。。

copy


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           [b][color=#80FF00]([/color][/b][color=BLUE]setq[/color] p1 [b][color=#00FFFF]([/color][/b][color=BLUE]polar[/color] [b][color=#0080FF]([/color][/b][color=BLUE]list[/color] [b][color=#FF00FF]([/color][/b][color=BLUE]car[/color] ce[b][color=#FF00FF])[/color][/b] [b][color=#FF00FF]([/color][/b][color=BLUE]+[/color] [b][color=#FF0000]([/color][/b][color=BLUE]-[/color] [b][color=#80FF00]([/color][/b][color=BLUE]cadr[/color] ce[b][color=#80FF00])[/color][/b] r[b][color=#FF0000])[/color][/b] [b][color=#FF0000]([/color][/b][color=BLUE]*[/color] k d[b][color=#FF0000])[/color][/b][b][color=#FF00FF])[/color][/b][b][color=#0080FF])[/color][/b] [b][color=#0080FF]([/color][/b][color=BLUE]*[/color] [b][color=#FF00FF]([/color][/b][color=BLUE]1+[/color] k[b][color=#FF00FF])[/color][/b] [color=BLUE]pi[/color][b][color=#0080FF])[/color][/b] [b][color=#0080FF]([/color][/b][color=BLUE]sqrt[/color] [b][color=#FF00FF]([/color][/b][color=BLUE]-[/color] [b][color=#FF0000]([/color][/b][color=BLUE]expt[/color] r 2[b][color=#FF0000])[/color][/b] [b][color=#FF0000]([/color][/b][color=BLUE]expt[/color] [b][color=#80FF00]([/color][/b][color=BLUE]-[/color] r [b][color=#00FFFF]([/color][/b][color=BLUE]*[/color] [b][color=#0080FF]([/color][/b][color=BLUE]1+[/color] k[b][color=#0080FF])[/color][/b] d[b][color=#00FFFF])[/color][/b][b][color=#80FF00])[/color][/b] 2[b][color=#FF0000])[/color][/b][b][color=#FF00FF])[/color][/b][b][color=#0080FF])[/color][/b][b][color=#00FFFF])[/color][/b][b][color=#80FF00])[/color][/b]
           [b][color=#80FF00]([/color][/b][color=BLUE]setq[/color] p2 [b][color=#00FFFF]([/color][/b][color=BLUE]polar[/color] p1 [b][color=#0080FF]([/color][/b][color=BLUE]*[/color] 0.5 [color=BLUE]pi[/color][b][color=#0080FF])[/color][/b] d[b][color=#00FFFF])[/color][/b][b][color=#80FF00])[/color][/b]
           [b][color=#80FF00]([/color][/b][color=BLUE]setq[/color] pl [b][color=#00FFFF]([/color][/b][color=BLUE]cons[/color] p1 pl[b][color=#00FFFF])[/color][/b] pl [b][color=#00FFFF]([/color][/b][color=BLUE]cons[/color] p2 pl[b][color=#00FFFF])[/color][/b][b][color=#80FF00])[/color][/b]
         [b][color=#FF0000])[/color][/b]
         [b][color=#FF0000]([/color][/b][color=BLUE]setq[/color] k -1[b][color=#FF0000])[/color][/b]
         [b][color=#FF0000]([/color][/b][color=BLUE]repeat[/color] n
           [b][color=#80FF00]([/color][/b][color=BLUE]setq[/color] k [b][color=#00FFFF]([/color][/b][color=BLUE]1+[/color] k[b][color=#00FFFF])[/color][/b][b][color=#80FF00])[/color][/b]
           [b][color=#80FF00]([/color][/b][color=BLUE]setq[/color] p1 [b][color=#00FFFF]([/color][/b][color=BLUE]polar[/color] [b][color=#0080FF]([/color][/b][color=BLUE]list[/color] [b][color=#FF00FF]([/color][/b][color=BLUE]car[/color] ce[b][color=#FF00FF])[/color][/b] [b][color=#FF00FF]([/color][/b][color=BLUE]+[/color] [b][color=#FF0000]([/color][/b][color=BLUE]cadr[/color] ce[b][color=#FF0000])[/color][/b] [b][color=#FF0000]([/color][/b][color=BLUE]*[/color] k d[b][color=#FF0000])[/color][/b][b][color=#FF00FF])[/color][/b][b][color=#0080FF])[/color][/b] [b][color=#0080FF]([/color][/b][color=BLUE]*[/color] [b][color=#FF00FF]([/color][/b][color=BLUE]+[/color] n [b][color=#FF0000]([/color][/b][color=BLUE]1+[/color] k[b][color=#FF0000])[/color][/b][b][color=#FF00FF])[/color][/b] [color=BLUE]pi[/color][b][color=#0080FF])[/color][/b] [b][color=#0080FF]([/color][/b][color=BLUE]sqrt[/color] [b][color=#FF00FF]([/color][/b][color=BLUE]-[/color] [b][color=#FF0000]([/color][/b][color=BLUE]expt[/color] r 2[b][color=#FF0000])[/color][/b] [b][color=#FF0000]([/color][/b][color=BLUE]expt[/color] [b][color=#80FF00]([/color][/b][color=BLUE]*[/color] k d[b][color=#80FF00])[/color][/b] 2[b][color=#FF0000])[/color][/b][b][color=#FF00FF])[/color][/b][b][color=#0080FF])[/color][/b][b][color=#00FFFF])[/color][/b][b][color=#80FF00])[/color][/b]
           [b][color=#80FF00]([/color][/b][color=BLUE]setq[/color] p2 [b][color=#00FFFF]([/color][/b][color=BLUE]polar[/color] p1 [b][color=#0080FF]([/color][/b][color=BLUE]*[/color] 0.5 [color=BLUE]pi[/color][b][color=#0080FF])[/color][/b] d[b][color=#00FFFF])[/color][/b][b][color=#80FF00])[/color][/b]
           [b][color=#80FF00]([/color][/b][color=BLUE]setq[/color] pl [b][color=#00FFFF]([/color][/b][color=BLUE]cons[/color] p1 pl[b][color=#00FFFF])[/color][/b] pl [b][color=#00FFFF]([/color][/b][color=BLUE]cons[/color] p2 pl[b][color=#00FFFF])[/color][/b][b][color=#80FF00])[/color][/b]
         [b][color=#FF0000])[/color][/b]
         [b][color=#FF0000]([/color][/b][color=BLUE]setq[/color] p [b][color=#80FF00]([/color][/b][color=BLUE]list[/color] [b][color=#00FFFF]([/color][/b][color=BLUE]-[/color] [b][color=#0080FF]([/color][/b][color=BLUE]car[/color] ce[b][color=#0080FF])[/color][/b] r[b][color=#00FFFF])[/color][/b] [b][color=#00FFFF]([/color][/b][color=BLUE]+[/color] [b][color=#0080FF]([/color][/b][color=BLUE]cadr[/color] ce[b][color=#0080FF])[/color][/b] r[b][color=#00FFFF])[/color][/b][b][color=#80FF00])[/color][/b][b][color=#FF0000])[/color][/b]
         [b][color=#FF0000]([/color][/b][color=BLUE]setq[/color] pl [b][color=#80FF00]([/color][/b][color=BLUE]cons[/color] p pl[b][color=#80FF00])[/color][/b][b][color=#FF0000])[/color][/b]
         [b][color=#FF0000]([/color][/b][color=BLUE]setq[/color] pl [b][color=#80FF00]([/color][/b][color=BLUE]reverse[/color] pl[b][color=#80FF00])[/color][/b][b][color=#FF0000])[/color][/b]
         [b][color=#FF0000]([/color][/b][color=BLUE]setq[/color] bl [b][color=#80FF00]([/color][/b][color=BLUE]cons[/color] 0.0 bl[b][color=#80FF00])[/color][/b][b][color=#FF0000])[/color][/b]
         [b][color=#FF0000]([/color][/b][color=BLUE]setq[/color] k -1[b][color=#FF0000])[/color][/b]
         [b][color=#FF0000]([/color][/b][color=BLUE]repeat[/color] [b][color=#80FF00]([/color][/b][color=BLUE]-[/color] [b][color=#00FFFF]([/color][/b][color=BLUE]length[/color] pl[b][color=#00FFFF])[/color][/b] 2[b][color=#80FF00])[/color][/b]
           [b][color=#80FF00]([/color][/b][color=BLUE]setq[/color] k [b][color=#00FFFF]([/color][/b][color=BLUE]1+[/color] k[b][color=#00FFFF])[/color][/b][b][color=#80FF00])[/color][/b]
           [b][color=#80FF00]([/color][/b][color=BLUE]if[/color] [b][color=#00FFFF]([/color][/b][color=BLUE]=[/color] [b][color=#0080FF]([/color][/b][color=BLUE]rem[/color] k 2[b][color=#0080FF])[/color][/b] 0[b][color=#00FFFF])[/color][/b]
             [b][color=#00FFFF]([/color][/b][color=BLUE]setq[/color] bl [b][color=#0080FF]([/color][/b][color=BLUE]cons[/color] 0.0 bl[b][color=#0080FF])[/color][/b][b][color=#00FFFF])[/color][/b]
             [b][color=#00FFFF]([/color][/b][color=BLUE]setq[/color] bl [b][color=#0080FF]([/color][/b][color=BLUE]if[/color] [b][color=#FF00FF]([/color][/b][color=BLUE]zerop[/color] [b][color=#FF0000]([/color][/b][color=BLUE]apply[/color] '[color=BLUE]+[/color] bl[b][color=#FF0000])[/color][/b][b][color=#FF00FF])[/color][/b] [b][color=#FF00FF]([/color][/b][color=BLUE]cons[/color] 1.0 bl[b][color=#FF00FF])[/color][/b] [b][color=#FF00FF]([/color][/b][color=BLUE]cons[/color] -1.0 bl[b][color=#FF00FF])[/color][/b][b][color=#0080FF])[/color][/b][b][color=#00FFFF])[/color][/b]
           [b][color=#80FF00])[/color][/b]
         [b][color=#FF0000])[/color][/b]
         [b][color=#FF0000]([/color][/b][color=BLUE]setq[/color] bl [b][color=#80FF00]([/color][/b][color=BLUE]cons[/color] 0.0 bl[b][color=#80FF00])[/color][/b][b][color=#FF0000])[/color][/b]
       [b][color=#FF00FF])[/color][/b]
     [b][color=#0080FF])[/color][/b]
     [b][color=#0080FF]([/color][/b][color=BLUE]entmake[/color]
       [b][color=#FF00FF]([/color][/b][color=BLUE]append[/color]
         [b][color=#FF0000]([/color][/b][color=BLUE]list[/color]
           '[b][color=#80FF00]([/color][/b]0 . [color=BROWN]"LWPOLYLINE"[/color][b][color=#80FF00])[/color][/b]
           '[b][color=#80FF00]([/color][/b]100 . [color=BROWN]"AcDbEntity"[/color][b][color=#80FF00])[/color][/b]
           '[b][color=#80FF00]([/color][/b]100 . [color=BROWN]"AcDbPolyline"[/color][b][color=#80FF00])[/color][/b]
           [b][color=#80FF00]([/color][/b][color=BLUE]cons[/color] 90 [b][color=#00FFFF]([/color][/b][color=BLUE]length[/color] pl[b][color=#00FFFF])[/color][/b][b][color=#80FF00])[/color][/b]
           [b][color=#80FF00]([/color][/b][color=BLUE]cons[/color] 70 [b][color=#00FFFF]([/color][/b][color=BLUE]if[/color] [b][color=#0080FF]([/color][/b][color=BLUE]=[/color] [b][color=#FF00FF]([/color][/b][color=BLUE]getvar[/color] 'plinegen[b][color=#FF00FF])[/color][/b] 1[b][color=#0080FF])[/color][/b] 128 0[b][color=#00FFFF])[/color][/b][b][color=#80FF00])[/color][/b]
           [b][color=#80FF00]([/color][/b][color=BLUE]cons[/color] 38 [b][color=#00FFFF]([/color][/b][color=BLUE]caddr[/color] [b][color=#0080FF]([/color][/b][color=BLUE]cdr[/color] [b][color=#FF00FF]([/color][/b][color=BLUE]assoc[/color] 10 [b][color=#FF0000]([/color][/b][color=BLUE]entget[/color] ci[b][color=#FF0000])[/color][/b][b][color=#FF00FF])[/color][/b][b][color=#0080FF])[/color][/b][b][color=#00FFFF])[/color][/b][b][color=#80FF00])[/color][/b]
         [b][color=#FF0000])[/color][/b]
         [b][color=#FF0000]([/color][/b][color=BLUE]apply[/color] '[color=BLUE]append[/color] [b][color=#80FF00]([/color][/b][color=BLUE]mapcar[/color] '[b][color=#00FFFF]([/color][/b][color=BLUE]lambda[/color] [b][color=#0080FF]([/color][/b] a b [b][color=#0080FF])[/color][/b] [b][color=#0080FF]([/color][/b][color=BLUE]list[/color] [b][color=#FF00FF]([/color][/b][color=BLUE]cons[/color] 10 a[b][color=#FF00FF])[/color][/b] [b][color=#FF00FF]([/color][/b][color=BLUE]cons[/color] 42 b[b][color=#FF00FF])[/color][/b][b][color=#0080FF])[/color][/b][b][color=#00FFFF])[/color][/b] pl bl[b][color=#80FF00])[/color][/b][b][color=#FF0000])[/color][/b]
         [b][color=#FF0000]([/color][/b][color=BLUE]list[/color] [b][color=#80FF00]([/color][/b][color=BLUE]assoc[/color] 210 [b][color=#00FFFF]([/color][/b][color=BLUE]entget[/color] ci[b][color=#00FFFF])[/color][/b][b][color=#80FF00])[/color][/b][b][color=#FF0000])[/color][/b]
         [b][color=#FF0000]([/color][/b][color=BLUE]list[/color] '[b][color=#80FF00]([/color][/b]62 . 3[b][color=#80FF00])[/color][/b][b][color=#FF0000])[/color][/b]
       [b][color=#FF00FF])[/color][/b]
     [b][color=#0080FF])[/color][/b]
   [b][color=#00FFFF])[/color][/b]
 [b][color=#80FF00])[/color][/b]
 [b][color=#80FF00]([/color][/b][color=BLUE]*error*[/color] [color=BLUE]nil[/color][b][color=#80FF00])[/color][/b]
[b][color=#FF0000])[/color][/b]

HTH，M.R。

marko_ribar · 发表于 2022-7-5 18:07:29

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