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发表于 2015-1-19 12:32:28
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来自: 中国辽宁抚顺
怎么没人回呢? - Sub C3PE()
; \# W. m/ m3 s/ N2 V! q - Dim P0(2) As Double, P1 As Variant, P2 As Variant, P3 As Variant, P4 As Variant
. l K4 O C' R/ q) i - Dim X1 As Double, Y1 As Double, X2 As Double, Y2 As Double, X3 As Double, Y3 As Double$ c3 \) X+ }0 n
- Dim A As Double, B As Double, C As Double, F As Double, Ang As Double, R1 As Double, R2 As Double
" Q+ Q) ]/ O: S! o! x- y) H - On Error GoTo 10; P9 `4 [" @" K
- With ThisDrawing
4 @- c9 g+ x8 z) s8 d - P1 = .Utility.GetPoint(, "指定中心点")
H( d9 Y$ y; z, K; A - P2 = .Utility.GetPoint(, "指定第一点")$ p' V `1 {' n- i1 Q
- P3 = .Utility.GetPoint(, "指定第二点")
3 ^7 ?6 m y, [8 \; ^ - P4 = .Utility.GetPoint(, "指定第三点")
. p3 w+ o4 n" h4 u6 ` r6 D. g& \ - X1 = P2(0) - P1(0)
( x) g9 k/ y1 d: Z - Y1 = P2(1) - P1(1)
5 ]' R' `) ?! Q1 G$ C - X2 = P3(0) - P1(0), j7 ^& U9 @! w, E
- Y2 = P3(1) - P1(1)
- ~1 K) ?9 {+ c, u: O, v - X3 = P4(0) - P1(0)
" ~3 c0 f! s6 A8 ~ D - Y3 = P4(1) - P1(1)5 t9 X* W& t8 H- n3 H6 s
- A = (X1 * Y1 - X2 * Y2) * (Y1 ^ 2 - Y3 ^ 2) - (X1 * Y1 - X3 * Y3) * (Y1 ^ 2 - Y2 ^ 2)
$ t: G4 M9 B/ h, N$ I5 D' S/ Q/ l& }0 d - If A <> 0 Then
" U' c- l3 y' J5 L - B = ((X1 ^ 2 - X2 ^ 2) * (X1 * Y1 - X3 * Y3) - (X1 ^ 2 - X3 ^ 2) * (X1 * Y1 - X2 * Y2)) / A
( Y5 A3 s3 ]- z/ g7 T# p! S - C = ((X1 ^ 2 - X3 ^ 2) * (Y1 ^ 2 - Y2 ^ 2) - (X1 ^ 2 - X2 ^ 2) * (Y1 ^ 2 - Y3 ^ 2)) / A
! \9 R. ?0 F# x- I( | - F = -X1 ^ 2 - B * Y1 ^ 2 - C * X1 * Y1, d: [+ ]' W1 \
- If C = 0 Then! r1 X1 E8 b p q
- If B > 0 And F < 0 Then
4 D q( l; ^+ ]3 Y+ i. V* w6 h - Ang = 0. J( i7 k: e: w) R( M' p
- R1 = Sqr(-F)
2 Z7 V5 K8 d: T/ i- M - R2 = Sqr(-F / B)8 w/ `1 Z/ L5 ]
- Else, q% b8 {% J: M* K' c
- Exit Sub
5 B3 _" P' ^! e3 X/ _& d# X4 @ - End If& f; Q' J0 L: W# ^" P }
- Else
/ g3 c3 L1 ]) k! f - If B = 1 Then, x! |0 r- {3 J3 k6 g! F7 I
- If F < 0 And C > -2 And C < 2 Then
5 ~8 C+ |2 w! v) z- L - Ang = .Utility.AngleToReal(45, acDegrees)+ T' x2 a% Z% N0 _3 A
- R1 = Sqr(-2 * F / (2 + C))
( y2 Q, s2 t+ H: `# W% i - R2 = Sqr(-2 * F / (2 - C))3 _" F3 y4 ]) t; F2 U+ k
- Else6 `( o& ^, S; ^/ S+ @5 {# B
- Exit Sub1 B4 h6 Q2 w# E$ x9 x" ~7 m
- End If& o6 J& x9 I9 P/ W8 J
- Else
1 w1 p* s ?+ b5 x - Ang = Atn(C / (1 - B)) / 2
3 c& I" @/ i! x- j - If Ang < 0 Then Ang = Ang + .Utility.AngleToReal(90, acDegrees)+ }$ q8 d9 o U. a0 O3 G
- If B > -1 And F < 0 And C > -(1 + B * Tan(Ang) ^ 2) / Tan(Ang) And C < (B + Tan(Ang) ^ 2) / Tan(Ang) Or _$ P) v5 @, E( ~
- B < -1 And F > 0 And C > (B + Tan(Ang) ^ 2) / Tan(Ang) And C < -(1 + B * Tan(Ang) ^ 2) / Tan(Ang) Then
- X4 h' c3 [0 _0 n( Q - R2 = -F * (1 + Tan(Ang) ^ 2)
! ]$ j" r0 m5 U0 U5 a# } - R1 = Sqr(R2 / (1 + B * Tan(Ang) ^ 2 + C * Tan(Ang)))3 P( ]& Z) w8 B$ a) Z
- R2 = Sqr(R2 / (B + Tan(Ang) ^ 2 - C * Tan(Ang)))* Q# y u! M; l7 z; A; Z% i/ }
- Else, C& u+ B3 E7 n$ L" u/ o! ?4 L
- Exit Sub
7 T! y0 N0 J. V0 ~- H - End If3 Q+ z: M8 t" S
- End If
$ Q$ i4 }- ^2 u/ |4 \7 p - End If. d; |4 C% H4 i u9 `; ?' B# d) ^
- Else0 J! V* E9 w4 q! A0 k
- Exit Sub
' b" {$ J( g5 z' ] - End If& K2 ?0 P0 P9 S
- If R2 < R1 Then
$ k& i4 f* @% f0 L6 [% Z- m - .ModelSpace.AddEllipse P1, .Utility.PolarPoint(P0, Ang, R1), R2 / R1+ \4 h* C+ g6 y; D; Z) H4 Q \
- Else" l$ Z9 F- j1 C5 }
- .ModelSpace.AddEllipse P1, .Utility.PolarPoint(P0, Ang + .Utility.AngleToReal(90, acDegrees), R2), R1 / R2
7 f* U$ _) s, d5 }# N! j - End If
: k! K: K7 p6 Y/ y5 I - End With
- W/ O5 S/ i1 {0 u# f$ h - 10 End Sub
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