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发表于 2007-5-14 11:08:14
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来自： 中国辽宁营口
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Sub A() y) w0 W) A. ]2 U
Dim Alpha As Double, Alpha1 As Double, Alpha2 As Double1 `5 i* D4 G( k2 U
Dim Pl As AcadLWPolyline, P(5) As Double
8 C: F o. B V* v% P, ?+ X '用迭代运算寻找正确的角度Alpha
& d3 u* F) w" r( J Alpha2 = 1.5707963267949* a( U, w% x5 o! {
Do. J" G7 S" B/ y- X/ ^
Alpha = (Alpha1 + Alpha2) / 2' ^- M* v$ w" I/ Y0 c* q( h* {
If Alpha = Alpha1 Or Alpha = Alpha2 Then* p. P6 L. d+ `8 E5 p
If Abs(Tan(Alpha1) * 25 + (3.14159265358979 - Alpha1) * 25 - 300) < _+ X9 v% ^3 S; d. R8 i! D
Abs(Tan(Alpha2) * 25 + (3.14159265358979 - Alpha2) * 25 - 300) Then0 {, d0 w; u0 l. l( Z0 \$ k+ l$ b
Alpha = Alpha15 ` i- e% c5 e5 n$ U
Else
8 E6 l5 a+ B. q1 f1 r$ z0 z4 w Alpha = Alpha2" w9 Y' W* {4 b$ M% H, B
End If( y4 u8 N( R# O7 j5 O0 p& U) s
Exit Do
% |( c4 n* k3 P. O; V ElseIf Tan(Alpha) * 25 + (3.14159265358979 - Alpha) * 25 = 300 Then
2 K" X* r* K+ c( H) ?) y2 e Exit Do$ D M4 d) ^' g$ q+ n8 K7 r2 v
ElseIf Tan(Alpha) * 25 + (3.14159265358979 - Alpha) * 25 < 300 Then" p- t+ s, F6 @6 s
Alpha1 = Alpha
, C& U* N& _# e9 C- G" q7 W8 ? Else
, z$ P9 S \ t( M7 S6 S9 {# m Alpha2 = Alpha c0 _; v$ d2 d; r! L
End If/ T& E7 O7 s% H6 u3 R# }
Loop8 `; r; \0 [: g. w+ V& _
'画多段线
w3 G, f0 H0 w% [) Z; z P(1) = 25 / Cos(Alpha) '顶点1纵坐标# z6 K. v; R% U# s1 W- z
P(2) = 25 * Sin(Alpha) '顶点2横坐标% o) j H. @% K) k
P(3) = 25 * Cos(Alpha) '顶点2纵坐标
+ }' a+ `3 S- K P(4) = -P(2) '顶点3与顶点2对称
5 f& I" _1 ~! D3 P% E0 q i P(5) = P(3)
1 x6 R0 Z# N/ H8 M2 }4 i: ] Set Pl = ThisDrawing.ModelSpace.AddLightWeightPolyline(P) '画多段线
" W. Z; _1 e" D/ f( ?- z Pl.Closed = True '多段线闭合3 e5 Y/ F/ j# i7 N8 t
Pl.SetBulge 1, -(P(3) + 25) / P(2) '第2段改为圆弧
; `4 n' a# G/ EEnd Sub
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. G/ S2 |9 S) i$ y2 g- {[ 本帖最后由 woaishuijia 于 2007-5-14 20:51 编辑 ] |
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发表于 2007-5-12 22:48:35
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