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发表于 2015-12-25 04:29:33
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来自： 中国黑龙江伊春
本帖最后由 woaishuijia 于 2015-12-25 08:04 编辑 4 `. @& ^* e4 Q" d8 C9 [: J. P
- Dim P1 As Variant, P2 As Variant, P3 As Variant, R As Double
! \; u4 B& @0 ] - Dim B As AcadBlock, C As AcadCircle, L1 As AcadLine, L2 As AcadLine, L3 As AcadLine% V& I2 `7 G+ k6 |! [. }+ `
- Dim A As Double, A1 As Double, A2 As Double, A3 As Double, A4 As Double% X- ?4 F4 _7 ~
- With ThisDrawing
W; E( y o2 K+ ]( r, H; \ - '操作者屏幕输入参数
6 l% V% f* v9 U% C: U( V - On Error GoTo 101 _/ Q# Z1 r. M) v/ O2 c7 A
- With .Utility
4 w3 T( V% t! v( `9 }# } - P1 = .GetPoint(, "指定圆外第一点")0 V( Y. T% ^. x4 [7 ?
- P2 = .GetPoint(, "指定圆外同侧第二点")
, X8 s. a1 g. u) G* S2 {# x - P3 = .GetPoint(, "指定圆心"), x5 f9 ]; y. ]3 w& q: Q9 M
- R = .GetDistance(P3, "指定半径")
' J2 Y+ N! K8 C; D& I W* H6 { - End With
3 J4 T+ T: j% w - '检查输入的参数,如果有一点或两点在圆内部,则退出宏9 C5 g0 x& t2 s8 g$ L* l, y8 x8 X
- If (P3(0) - P1(0)) ^ 2 + (P3(1) - P1(1)) ^ 2 < R ^ 2 Or (P3(0) - P2(0)) ^ 2 + (P3(1) - P2(1)) ^ 2 < R ^ 2 Then GoTo 107 B( F9 X2 k, T2 n4 Y' e$ q
- '判断作图空间* g: f; F# E! c9 O
- If .ActiveSpace = acModelSpace Then
% a6 C" T1 p, ]% Z* y- Y$ [ - Set B = .ModelSpace
. G' x( T3 s% \% Y( E - Else
9 v# I) p* G* _) V - Set B = .PaperSpace/ T4 U L _9 w8 H! A) T
- End If; Y: S: K, ^6 ]( c! G
- '按输入参数画圆7 _- D& J" ]0 _9 h m; c7 N
- Set C = B.AddCircle(P3, R)5 O' _/ U; h' m
- '在输入的圆外两点间连线
' l% Q: `/ U3 ^+ m- w; f9 y - Set L1 = B.AddLine(P2, P1)
# V3 j% `' ~1 s6 v" D/ r! ?% O - '检查连线与圆是否相交,如不相交则继续;如相交则删除圆和连线并结束宏
# G; t- q8 A8 t4 _ - P3 = C.IntersectWith(L1, acExtendNone)' H- j s3 u9 t6 f
- If UBound(P3) = -1 Then W' B# R- a4 x) z& ~, T
- '将直线L1的起点改到圆心5 k1 V4 Y3 B! {
- L1.StartPoint = C.Center
$ V* m: m6 ^0 z: h& G - '从圆心到输入的第二点画直线L2
4 k9 \0 _" o$ t- k' A3 j: w( t+ @6 Y - Set L2 = B.AddLine(C.Center, P2)2 }$ j: u8 d# R @; R! Y
- '用两直线的角度计算迭代运算的边界0 v* x" m3 v; a9 H9 C
- If L1.Angle - L2.Angle > 0 Then m, j0 o! v: M) c
- If L1.Angle - L2.Angle < .Utility.AngleToReal(180, acDegrees) Then8 l( i4 p- W" @5 i ~
- A1 = L1.Angle3 q3 a6 C4 c! @) F, p* o) T
- A2 = L2.Angle
. n B) p. G: e7 T7 K* M - Else# S7 P. \( R0 X' a
- L1.EndPoint = P21 z+ d7 v$ N# k6 o) B" A/ g
- L2.EndPoint = P1+ ]9 i& ?0 J3 B/ X) P7 R4 N, V
- A1 = L1.Angle
3 X- O& [9 M2 b6 ^: ^" z - A2 = L2.Angle - 2 * .Utility.AngleToReal(180, acDegrees)
) w& k- j$ l7 v. s; X# M - End If$ b8 n& B( |: l( e$ ^6 w
- Else7 {+ N2 `+ T2 g( k; R0 I
- If L2.Angle - L1.Angle < .Utility.AngleToReal(180, acDegrees) Then- X3 X' }9 R+ D! K
- L1.EndPoint = P26 E6 ]( g4 w0 E! q
- L2.EndPoint = P1
' R8 |" n( q) ?+ b$ \6 F - A1 = L1.Angle/ K$ u( J5 X5 W
- A2 = L2.Angle
: U# S1 F, x, K& Z. n9 n - Else
: b5 w: ]0 o, l& z% q6 H - A1 = L1.Angle
9 O$ [+ c5 T o. C& Q9 e - A2 = L2.Angle - 2 * .Utility.AngleToReal(180, acDegrees)+ f" V! R! S; |7 ?4 M
- End If
1 m6 f M6 C7 l- A - End If
T, r. a4 O: U - '以圆心为起点画第直线L3
2 B/ P4 ~' [6 C8 ?, A - Set L3 = B.AddLine(C.Center, C.Center)
0 R2 l/ a7 A# [) L# e7 X - '循环,迭代运算
; A5 H" E! h# ^2 B1 L - Do
" b Q2 Y1 p: Z3 {9 G! O - '简单的插值法
7 n& D9 i& l1 e) p2 b. ~ - A = (A1 + A2) / 2
0 o+ f5 V/ L: t - '直线L3和入射和反射线的端点改到圆上尝试的点 U% u7 A1 b! S
- L3.EndPoint = .Utility.PolarPoint(C.Center, A, R)) v l9 L* L/ x' L1 v
- L1.StartPoint = L3.EndPoint
H& F' Z/ ]$ |3 y7 d - L2.StartPoint = L3.EndPoint
E8 V$ i# W4 H - '计算入射和反射线分别与直线L3的夹角
0 h/ g5 P* l. D% Q) }5 T0 j - A3 = L1.Angle - L3.Angle
@" H q1 R9 h } - If A3 < 0 Then A3 = A3 + 2 * .Utility.AngleToReal(180, acDegrees): X) Z5 T5 ]' F% d. ?0 L( |
- A4 = L3.Angle - L2.Angle7 Q _4 z# y/ R7 j
- If A4 < 0 Then A4 = A4 + 2 * .Utility.AngleToReal(180, acDegrees)
, x5 i. T# z+ F. L" R: Q - '如果两夹角相等或已运算到浮点数的最高精度则退出循环
0 ~* ^( n# P+ @9 N) v; d - '否则将当前尝试点作为新的边界继续循环运算; g" r0 L! Z c! |) c3 b, R, X6 s
- If A3 = A4 Or A = A1 Or A = A2 Then( r, P: |* S4 y$ H
- Exit Do( S/ T$ y" X5 b# O+ j% T
- ElseIf A3 > A4 Then% G5 [3 Z* s) w, k
- A2 = A) N/ m* ^8 l3 M1 t: F) M* ?: Y
- Else
% ]0 m4 D& a8 W; @% v - A1 = A0 g, `: o5 I7 y0 h% C
- End If3 {/ y$ W% H$ N. \6 w+ o0 P
- Loop w' [; r3 F7 K) H" L
- Else
4 E. e a2 q( t - C.Delete- |4 M6 f. E+ N5 W- Z: }
- L1.Delete' R7 ]3 j0 z) c
- Exit Sub
5 z X1 t% i) ^: Y! V% f) _1 H Z - End If2 g. ^" N5 v' c0 J* E
- End With! ?9 T) h# D; V2 O0 Y
- 10:
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发表于 2015-12-23 07:38:17
楼主
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