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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()
# T6 A. _ j& }9 T - Dim P0(2) As Double, P1 As Variant, P2 As Variant, P3 As Variant, P4 As Variant
( A" K+ j1 c4 i# z" w - Dim X1 As Double, Y1 As Double, X2 As Double, Y2 As Double, X3 As Double, Y3 As Double1 M& Z. h# S. i$ H0 Z0 m: H
- Dim A As Double, B As Double, C As Double, F As Double, Ang As Double, R1 As Double, R2 As Double$ G; @ B" i% ^: g5 P3 ^$ {
- On Error GoTo 10
% z. A; Q( s. Z3 y - With ThisDrawing
1 H( i: f' [+ D2 g - P1 = .Utility.GetPoint(, "指定中心点")* P/ H' } l- A2 c. n F
- P2 = .Utility.GetPoint(, "指定第一点")
; V* t8 H4 k* U! {, l - P3 = .Utility.GetPoint(, "指定第二点")1 m+ F# {0 t$ |+ P
- P4 = .Utility.GetPoint(, "指定第三点")
; U- D0 w/ x& w2 _. A) Q+ k - X1 = P2(0) - P1(0)
( s- Q- T- T- ^+ W - Y1 = P2(1) - P1(1)
( n1 E; j% n* s) T - X2 = P3(0) - P1(0)
; V: o. O8 W# S8 z; L - Y2 = P3(1) - P1(1) }4 K: j/ ]6 J6 W* b2 b
- X3 = P4(0) - P1(0)
; ` j& t- B1 g, ~2 V. [7 z9 k, _6 r - Y3 = P4(1) - P1(1); e& a9 h# B! g
- A = (X1 * Y1 - X2 * Y2) * (Y1 ^ 2 - Y3 ^ 2) - (X1 * Y1 - X3 * Y3) * (Y1 ^ 2 - Y2 ^ 2)9 B) w& H3 V& B$ k w. H3 d @7 l
- If A <> 0 Then/ H8 M: N5 B ~0 _
- B = ((X1 ^ 2 - X2 ^ 2) * (X1 * Y1 - X3 * Y3) - (X1 ^ 2 - X3 ^ 2) * (X1 * Y1 - X2 * Y2)) / A
; d% X! `+ f3 s7 D7 t/ n - C = ((X1 ^ 2 - X3 ^ 2) * (Y1 ^ 2 - Y2 ^ 2) - (X1 ^ 2 - X2 ^ 2) * (Y1 ^ 2 - Y3 ^ 2)) / A. V1 i2 g6 @; J# l
- F = -X1 ^ 2 - B * Y1 ^ 2 - C * X1 * Y1/ C" Z# |9 T' s7 L. n
- If C = 0 Then: p# i8 C( H( }3 v: |) ~/ P
- If B > 0 And F < 0 Then
# K- r) Q- I. c/ h$ T9 m - Ang = 0
' X1 u& ]9 |( H, P# k - R1 = Sqr(-F). |) F6 k; @0 v0 a, H
- R2 = Sqr(-F / B)
1 J- K- X* V- e' w# m - Else
5 K$ I. c8 W3 m# j: b - Exit Sub, q/ _) e! Q! G5 ~' d2 P9 i
- End If
% J4 v3 V' [! P1 n9 G - Else
; x9 f) ?8 l5 t - If B = 1 Then
7 c/ `: M' ]; `3 P/ C- p! V4 h - If F < 0 And C > -2 And C < 2 Then
/ G! j+ }8 S- J - Ang = .Utility.AngleToReal(45, acDegrees)4 T: ~% f- Q% A0 C8 U
- R1 = Sqr(-2 * F / (2 + C))3 @! M, k# Q6 O$ a) d7 n
- R2 = Sqr(-2 * F / (2 - C)) M* z ] z0 t0 e* I
- Else- v' I" A$ Y% B+ E' X
- Exit Sub+ L( m& D0 s! s! d" p
- End If6 A# ?9 Y1 P$ G2 @
- Else
( K8 B$ z8 o/ Y9 {+ y: x - Ang = Atn(C / (1 - B)) / 2
: X5 F; l6 K0 C7 `& P - If Ang < 0 Then Ang = Ang + .Utility.AngleToReal(90, acDegrees), E7 T+ t; N1 z$ p# @* P. T: a+ H
- If B > -1 And F < 0 And C > -(1 + B * Tan(Ang) ^ 2) / Tan(Ang) And C < (B + Tan(Ang) ^ 2) / Tan(Ang) Or _! o! U* @3 P! w& _
- B < -1 And F > 0 And C > (B + Tan(Ang) ^ 2) / Tan(Ang) And C < -(1 + B * Tan(Ang) ^ 2) / Tan(Ang) Then+ P' }7 d* j3 s5 j2 W* o
- R2 = -F * (1 + Tan(Ang) ^ 2)3 x7 p, \2 |1 ^: K9 k
- R1 = Sqr(R2 / (1 + B * Tan(Ang) ^ 2 + C * Tan(Ang))). K4 Q$ V* P* E( t$ c
- R2 = Sqr(R2 / (B + Tan(Ang) ^ 2 - C * Tan(Ang)))8 N: O) J) q/ ]) e; k1 l- u
- Else
( y2 c- Y9 u* x a } - Exit Sub
6 f, S; {# `9 g0 B0 ~% X! K - End If! a" H5 R+ W& V$ e1 \8 Z1 L0 O( Q9 R7 S
- End If$ G: P( E7 ]: K+ i5 \
- End If" F; S: [: v4 \4 H+ E
- Else9 ~3 ?, x! M, Q. y
- Exit Sub
5 x* P, A! U3 S - End If R" R% f7 g3 ]; @+ ?$ y
- If R2 < R1 Then
& A9 v1 k& r: a' c% w - .ModelSpace.AddEllipse P1, .Utility.PolarPoint(P0, Ang, R1), R2 / R1% n; f: ~& \; b/ s# _ X/ y
- Else6 Q( t! T( u) y* X
- .ModelSpace.AddEllipse P1, .Utility.PolarPoint(P0, Ang + .Utility.AngleToReal(90, acDegrees), R2), R1 / R2; T; E8 P3 v5 z0 A9 ^; W
- End If
' b* f$ j1 g! V6 m* s E - End With v. |6 I! c! F6 D8 v, O3 t
- 10 End Sub
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发表于 2015-1-14 00:13:04
发表于 2015-1-19 14:23:08
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