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发表于 2015-1-19 12:32:28
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怎么没人回呢?- Sub C3PE()
3 u# b3 l$ n, g, ~# X, i - Dim P0(2) As Double, P1 As Variant, P2 As Variant, P3 As Variant, P4 As Variant* A+ |$ O$ F6 A# n' N
- Dim X1 As Double, Y1 As Double, X2 As Double, Y2 As Double, X3 As Double, Y3 As Double
" _) T b% u* ?$ O$ e - Dim A As Double, B As Double, C As Double, F As Double, Ang As Double, R1 As Double, R2 As Double
7 C* U( t2 x! F - On Error GoTo 10
- A& x% }; `/ W0 W3 P/ U2 \ - With ThisDrawing8 k+ ?- V( }. _0 a9 O: {: \/ c
- P1 = .Utility.GetPoint(, "指定中心点")
4 W8 L9 Q- b& c5 t; u - P2 = .Utility.GetPoint(, "指定第一点")
% G# `) n. ^- h# y# S - P3 = .Utility.GetPoint(, "指定第二点")' A2 f' v3 x7 M
- P4 = .Utility.GetPoint(, "指定第三点")
6 X+ P# |6 ^2 }; ?* Q& ^- N - X1 = P2(0) - P1(0)$ P. w" }+ U. [5 K$ |
- Y1 = P2(1) - P1(1). j/ _) u! _, y( s% _2 x: \
- X2 = P3(0) - P1(0)0 b6 I# W% Z2 V& Q; P
- Y2 = P3(1) - P1(1)
; E2 ^' L6 F! P! I, ?2 d v - X3 = P4(0) - P1(0)) q; v+ J+ y3 m3 S
- Y3 = P4(1) - P1(1)% c* W6 e- o m& c" F I
- A = (X1 * Y1 - X2 * Y2) * (Y1 ^ 2 - Y3 ^ 2) - (X1 * Y1 - X3 * Y3) * (Y1 ^ 2 - Y2 ^ 2)' @$ q/ X$ F& u+ ?( t" x/ k" W
- If A <> 0 Then/ G3 E' N' F% a7 r6 W
- B = ((X1 ^ 2 - X2 ^ 2) * (X1 * Y1 - X3 * Y3) - (X1 ^ 2 - X3 ^ 2) * (X1 * Y1 - X2 * Y2)) / A0 p0 b' D7 |2 N
- C = ((X1 ^ 2 - X3 ^ 2) * (Y1 ^ 2 - Y2 ^ 2) - (X1 ^ 2 - X2 ^ 2) * (Y1 ^ 2 - Y3 ^ 2)) / A
$ x" J/ N) @' L - F = -X1 ^ 2 - B * Y1 ^ 2 - C * X1 * Y1; T( k' L# v+ C' A$ C
- If C = 0 Then6 c/ O) W( O# {* A( N
- If B > 0 And F < 0 Then
- p8 M8 I# G) i2 v$ U - Ang = 08 j" \6 V4 Q \
- R1 = Sqr(-F)
! U6 g$ v4 d+ I, h - R2 = Sqr(-F / B)
) T$ q# M8 \0 O w$ r& T( U) o - Else
" b* d6 W7 @ V7 Y1 n2 a0 f1 x - Exit Sub# e9 W4 E+ ]3 ]
- End If! L7 U1 z# g- d' i' k3 b
- Else+ {3 k8 F2 y# i# r F* j
- If B = 1 Then2 n( @# m) J# W
- If F < 0 And C > -2 And C < 2 Then
& X- K6 |! ~1 i4 s; t$ B/ o - Ang = .Utility.AngleToReal(45, acDegrees)3 @! p+ A4 l- r& R/ z8 l" E
- R1 = Sqr(-2 * F / (2 + C))3 c: D3 M+ v3 I# i8 T% R# m
- R2 = Sqr(-2 * F / (2 - C))3 O; k5 n# T d0 t2 J5 l
- Else. K- f- k& p" R2 s- t
- Exit Sub
- _" j3 c: v% Q7 D9 o - End If
+ o& E% r- y$ G+ ~4 ]# s - Else
- X. }# o0 N+ p5 T - Ang = Atn(C / (1 - B)) / 2# W" n& |- E$ Z" ?
- If Ang < 0 Then Ang = Ang + .Utility.AngleToReal(90, acDegrees)- p. P! B1 I# {0 t4 u2 {0 ^% c9 r
- If B > -1 And F < 0 And C > -(1 + B * Tan(Ang) ^ 2) / Tan(Ang) And C < (B + Tan(Ang) ^ 2) / Tan(Ang) Or _
X) T0 i' y: E& ~2 @% h - B < -1 And F > 0 And C > (B + Tan(Ang) ^ 2) / Tan(Ang) And C < -(1 + B * Tan(Ang) ^ 2) / Tan(Ang) Then. l7 T/ _: |% J2 `
- R2 = -F * (1 + Tan(Ang) ^ 2)" F, X7 @; S; Q% b# T
- R1 = Sqr(R2 / (1 + B * Tan(Ang) ^ 2 + C * Tan(Ang)))) n5 I0 a; J' ~* T+ o
- R2 = Sqr(R2 / (B + Tan(Ang) ^ 2 - C * Tan(Ang)))! ]) v0 W2 E& d9 A9 ?/ p: W3 b- [7 b. X
- Else
B' w, [1 |. X- X - Exit Sub
' |, c8 _# ?% V) g9 ~ - End If
4 W/ w% O2 G0 l - End If
& p# H4 h6 q, s4 k2 y - End If
% h% d4 s# @: p - Else9 C- W0 `1 \8 \4 ~) p
- Exit Sub
1 s; {- N8 P& O$ q1 ]3 y. X! } - End If
9 E/ z3 e; M9 t6 r4 H. {' f& B0 A1 @ - If R2 < R1 Then) ?9 [, i5 s7 Z* z) K0 {, s
- .ModelSpace.AddEllipse P1, .Utility.PolarPoint(P0, Ang, R1), R2 / R1& j$ f" L1 w5 G
- Else
4 o1 @# H+ ^8 N& q - .ModelSpace.AddEllipse P1, .Utility.PolarPoint(P0, Ang + .Utility.AngleToReal(90, acDegrees), R2), R1 / R2' `& o0 Q" H, {8 S. l, l0 y
- End If
- K& o3 }% Y& t+ b' p7 c - End With* e! c+ B6 ~1 d. @
- 10 End Sub
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