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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
. s" k8 ^9 f7 K4 m& f- Dim P1 As Variant, P2 As Variant, P3 As Variant, R As Double: k$ F) W- Y( E: T1 k3 e
- Dim B As AcadBlock, C As AcadCircle, L1 As AcadLine, L2 As AcadLine, L3 As AcadLine
1 X: W! \4 E, ]- ^, n# G - Dim A As Double, A1 As Double, A2 As Double, A3 As Double, A4 As Double2 S! C$ l% o" ]( q" O
- With ThisDrawing
& h, v: k. i0 F) b2 B7 j - '操作者屏幕输入参数
7 y( h1 H! @, y - On Error GoTo 10& Q" Q I% K3 \. @ b
- With .Utility- j- h; d" [9 S) c9 s3 P
- P1 = .GetPoint(, "指定圆外第一点")
; k3 V0 z9 { J( ]5 g# M. Z; C1 Y. V - P2 = .GetPoint(, "指定圆外同侧第二点"), O/ N- b" ^$ C! _9 M7 A
- P3 = .GetPoint(, "指定圆心")
4 Q9 k6 {* i% J+ f+ B - R = .GetDistance(P3, "指定半径")+ \6 l, L9 A) X. I
- End With
1 o- \! f: F$ t3 h - '检查输入的参数,如果有一点或两点在圆内部,则退出宏/ F4 y) \) h( E6 x0 \$ N
- 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 10% U* x' q' ^* f' z2 Y2 z
- '判断作图空间% x8 ~7 f. I+ c6 A# m5 l) t
- If .ActiveSpace = acModelSpace Then2 k# r7 j5 G0 l9 |
- Set B = .ModelSpace2 L) ]" C0 O: L% L$ Q
- Else+ J% s' E! [7 k! z- u" i$ T
- Set B = .PaperSpace
- m2 o" h6 O9 r+ } - End If1 V0 W% l, r* L7 e8 | K
- '按输入参数画圆, C9 h5 C/ Z' u8 V" x2 J
- Set C = B.AddCircle(P3, R)' N# V3 S- F+ H3 w5 ` \0 W+ `7 A9 r
- '在输入的圆外两点间连线
- L" y# p, m$ D( ^' o7 B - Set L1 = B.AddLine(P2, P1)( W( c- s; i" N6 Y
- '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
6 s8 V- h9 x; P' ~' x) j - P3 = C.IntersectWith(L1, acExtendNone)
7 }* K4 |# l. @ - If UBound(P3) = -1 Then+ }+ K% K$ ~$ Z3 T1 I6 m- u6 w
- '将直线L1的起点改到圆心2 e+ Y) d5 ]) Y- v
- L1.StartPoint = C.Center4 F, D2 u7 W! v! B% G, a
- '从圆心到输入的第二点画直线L2. Q# v5 D2 v& r! m& F
- Set L2 = B.AddLine(C.Center, P2)2 V5 F# H {( b
- '用两直线的角度计算迭代运算的边界4 R& j( x0 N' ~0 G% C: X
- If L1.Angle - L2.Angle > 0 Then* n x8 c! d7 Y! |* p L
- If L1.Angle - L2.Angle < .Utility.AngleToReal(180, acDegrees) Then' k; B7 }. M- m
- A1 = L1.Angle% l# d$ x0 `7 Y4 c4 [$ y- o
- A2 = L2.Angle; z- A/ }4 R4 `9 C
- Else
6 }* F- s. J3 D$ Y. g4 e9 p8 |2 ?9 i7 q - L1.EndPoint = P2
& @% ]: u) K7 x - L2.EndPoint = P19 R/ K4 t( h; e* ]
- A1 = L1.Angle' k, }- N9 T; q# A. R& f) _2 j
- A2 = L2.Angle - 2 * .Utility.AngleToReal(180, acDegrees); b1 r7 [, |8 U
- End If$ U4 l+ a# v7 ~5 e c F
- Else/ y' |! {1 R' y
- If L2.Angle - L1.Angle < .Utility.AngleToReal(180, acDegrees) Then h# \5 N7 N' t6 w) \% h3 A# E
- L1.EndPoint = P25 O1 B5 P9 e: q: z# P0 w t! i4 _
- L2.EndPoint = P1. b2 F# e& @: Q* x: N1 b9 Y
- A1 = L1.Angle
0 ~* V f+ {$ u6 X0 C1 c - A2 = L2.Angle
: Z& X1 z3 S9 [6 E7 ~8 x5 Q8 Y - Else
6 V | o+ v; b/ g) c e9 q - A1 = L1.Angle. C4 y3 V8 v* x0 b3 `( P
- A2 = L2.Angle - 2 * .Utility.AngleToReal(180, acDegrees)# o1 e: G; D5 R D9 q
- End If
9 U6 U K" Z& o2 Q+ i - End If
: q( {8 Z. l6 f7 d% X - '以圆心为起点画第直线L3/ b! u1 i: ^- S
- Set L3 = B.AddLine(C.Center, C.Center)
' @9 a, `" K1 O) g& ]' O5 }. y: P - '循环,迭代运算( V( m( ~* v/ @& |5 Q$ v$ X9 a
- Do9 N# w! L5 ^, U: p2 A, p5 G* R
- '简单的插值法
/ U! d6 v! s' h2 t - A = (A1 + A2) / 2
- U* f' A3 U5 s7 s* Z - '直线L3和入射和反射线的端点改到圆上尝试的点) n2 U/ i, A4 l
- L3.EndPoint = .Utility.PolarPoint(C.Center, A, R)
, M$ |: W7 c0 C$ e6 m! } - L1.StartPoint = L3.EndPoint6 H, Z3 G* w) Y$ s# ~: d) v
- L2.StartPoint = L3.EndPoint) }9 W1 t; W. G/ S* H3 j
- '计算入射和反射线分别与直线L3的夹角
' h U G, R- W2 G - A3 = L1.Angle - L3.Angle: a. @2 g6 K ^: y& I! {# o! M
- If A3 < 0 Then A3 = A3 + 2 * .Utility.AngleToReal(180, acDegrees)
/ @+ {+ O1 Q: m( C! ?: q% l - A4 = L3.Angle - L2.Angle
2 I) ^$ G* i; L! c8 Q1 o; p - If A4 < 0 Then A4 = A4 + 2 * .Utility.AngleToReal(180, acDegrees)
6 n3 a3 t2 H9 D4 q$ w - '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. x: |& M$ d% S) D8 d6 L8 C% X5 [
- '否则将当前尝试点作为新的边界继续循环运算7 \* i- y; E) c7 S0 J
- If A3 = A4 Or A = A1 Or A = A2 Then
, T& X0 o5 J1 I( }+ C - Exit Do( r+ v& K" Q4 n- c% K
- ElseIf A3 > A4 Then- ]; E, R* P# n# f' M
- A2 = A" V) f I7 G; g1 S+ w9 I) A
- Else
1 W5 Q: ?: g: y2 S& `7 {& M - A1 = A
% e# i# s5 Z7 |5 R - End If
1 L! B, b$ Z1 [' D, C( z - Loop
. s/ x R3 Z; `) l6 q - Else
3 i) S0 b! j! ]8 t$ T9 }" i: I; I - C.Delete
$ x6 C/ [/ B G M. N$ ?6 F9 ~% ^ - L1.Delete
G( V, U& {( [& w+ D - Exit Sub
3 ^/ X+ @) Y( Q& s# W8 A - End If
3 ]" T% C( K+ i: M& K5 I5 ` - End With
& Q4 }4 N- }! {# i q - 10:
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发表于 2015-12-23 07:38:17
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