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发表于 2011-7-17 20:39:16
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来自： 中国辽宁
本帖最后由 woaishuijia 于 2011-7-17 20:44 编辑 ! k/ z% P- U+ b# O/ V
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打开"特性"选项板,选择多段线,就可以在"特性"选项板上修改包括宽度在内的多项属性.1 O1 ]# L o# Y, J) L- c
在CAD图形界面的对象捕捉不支持对多段线的轮廓的捕捉,也就无法精确地标注多段线的宽度.
! {/ E k+ C# E; z如果一定要做的话,只能借助于二次开发.# m6 k$ w X) Z; x4 {8 S
下面的VBA代码可以生成优化多段线的轮廓,谨供参考.- Sub 根据多段线轮廓生成块()+ ~# Z1 O. F: h9 i* Z! G
- Dim SS As AcadSelectionSet, Ft(0) As Integer, Fd(0) As Variant, Ap As AcadBlock, La As AcadLayer
! m V& W% I. u1 O - Dim B As AcadBlock, Ip(2) As Double, Bn As String- {+ X2 p5 H% a
- Dim Pl As AcadLWPolyline, E As Variant, Arc As AcadArc, Line As AcadLine, Sw As Double, Ew As Double* u1 v1 ^$ E& q9 H
- Dim P1 As Variant, P2 As Variant, P3 As Variant, P4 As Variant
4 n, S+ t9 M3 p( p. I2 v - Dim Ps() As Double, Bo As Integer, St(2) As Double, Et(2) As Double
" ]7 _ O; H4 `% K - Dim I As Integer, J As Integer, K As Integer8 d. [: G& v% y- C
- i7 e( F/ t2 O5 d6 Z1 T O
- '初始化有关用户参数, X6 T m0 l" X. I- \
- . _, b# b; s: j, T4 W# S2 t
- '设置将要生成的块的名称主体
$ W% G7 L" T3 ?% ]& ]; i - '该名称主体用系统日期和时间生成,以免块名称重复" z2 d: W' e" Y
- '该名称主体可由用户按个人爱好更改,比如添加其它内容.但建议不要去掉日期时间,理由同上
! m) }% |. W" a; Z8 L - Bn = CDbl(Date + Time())
! |2 E6 S) C' ]2 E - '设置将要根据多段线圆弧部分轮廓生成的样条曲线的节点数1 T, A( I+ B: C, e9 q" j" V
- '该参数+1=样条曲线节点数
* F) W2 h: E9 V' a - '该参数必须是正整数4 M$ D0 ?# F+ e9 P
- '该参数越大越接近真实,但系统负担也越重3 N O) D s9 N* `* P
- '该参数可由用户按实际情况更改. N: h( j& [$ Z. V' k7 i0 K
- Bo = 10
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p; u2 K2 G/ p7 z6 L4 |- c7 L - On Error Resume Next
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- '根据用户设置的参数重定义样条曲线节点坐标数组( G$ g1 g6 ?3 z/ _3 S
- ReDim Ps(Bo * 3 + 2)7 k$ w; ]3 _1 w& l w; A' K
-
# w( [+ N- W' ]8 u$ U7 s+ z; w - With ThisDrawing
+ L2 b2 ^+ {% E0 q3 a/ Z; N0 F# d - # ?! U7 j" O# X! o
- '创建选择集) W Y0 y/ K7 g* v, ]( r
- Set SS = .SelectionSets.Add("SS" )
9 h- {3 V9 r0 L: M1 i, o - '定义选择集过滤器为只选择优化多段线
6 M0 l2 Z- g; |% g. b3 W5 L - Fd(0) = "LWPOLYLINE"
" T% t# S+ J& O" W* T - '由用户在屏幕上选择图元对象3 a3 @9 E7 }& w5 e- s# e
- SS.SelectOnScreen Ft, Fd/ H- g0 I9 P c) s* }7 ]
-
; I( ]! k' t3 t" w7 _- C - '判断当前空间
+ _; H! I' H z9 c! z - If .ActiveSpace = acModelSpace Then
; _/ z5 I9 P. g5 \$ s: P - Set Ap = .ModelSpace, {9 t3 `/ p a
- Else
- j6 j+ {4 b8 G1 ` - Set Ap = .PaperSpace. `" F# S" p, i/ i3 S5 _8 D
- End If* K" g8 v& b+ i5 I
- '记录当前图层7 c' i4 g6 g M/ U- k
- Set La = .ActiveLayer) t. h: a& g7 X' C- E
- 5 R5 i: A: L6 X9 l. X. W% c* v
- '遍历选择集,每一条多段线的轮廓分别生成一个块,并在多段线的相同位置插入块参照8 ~# R5 T r K5 I5 u/ q
- For I = 0 To SS.Count - 1
5 F V5 f5 A' A# B -
6 J2 ]3 ?* r. b" D - '创建块,块名称为用户设置的名称主体+序号后缀& k1 n# R" B. {
- Set B = .Blocks.Add(Ip, Bn & "_" & I)) K9 y0 h1 w! K6 V- K6 R6 v
-
( m* [6 \: D% b8 I - '把当前图层改为0层,目的是把块内的子对象都放到0层
% r$ t* t: [& g5 v3 z9 T - .ActiveLayer = .Layers("0" )
" d# I3 {& o( B) E# W1 R -
# B+ z! n& G" u' M' D8 s - Set Pl = SS.Item(I), ^5 G2 [& o0 K4 V) M4 j
- '分解多段线,便于获取多段线每一段的详细参数, Z0 d4 g5 b v5 x! t
- E = Pl.Explode
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- '遍历多段线的每一段,分别生成轮廓线
/ o J/ X( b! W - For J = 0 To UBound(E)% m" j. \# Y7 m0 S" S& v- j! B
- $ T% S- \' ^( x1 s; `2 Q3 |
- '判断某段是否圆弧形. K! Z$ z2 Y& X( t7 S4 x+ q8 T; ?
- If E(J).ObjectName = "AcDbArc" Then. c2 n4 W9 P7 |
- ! j6 L$ A8 U, Q6 R
- '圆弧形
- y: M3 W$ I1 Q1 a8 Z2 E# I - $ k! G) S. f3 u' i; F* B* K7 @- J
- '根据圆弧形的凸凹判断分解所得的相应的圆弧是否与多段线圆弧形部分同向1 X8 b' D a; u7 m/ r+ w& K
- If Pl.GetBulge(J) > 0 Then5 k3 m7 J3 g. ~
- '同向
' y( ~9 ]# O& K: C& F - '获取该圆弧形部分的起始宽度和终止宽度4 G8 y: }' E2 K$ a; N. t" k2 Y
- '并作为分解后的圆弧的起始宽度和终止宽度: I/ U% L: c5 d. Y! b7 a
- Pl.GetWidth J, Sw, Ew# d+ J. n& z+ P0 _6 H
- Else# R% c% {. U+ G) _3 R6 u
- '反向7 f; Z1 J* J% V0 s) Z
- '获取该圆弧形部分的起始宽度和终止宽度
( W2 P! Z0 _6 L - '并作为分解后的圆弧的终止宽度和起始宽度
) i; \: K( y1 L7 `* h) |- H, | - Pl.GetWidth J, Ew, Sw
- ?! v9 U. W. I2 ?; f) v% j& k4 y - End If
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- Set Arc = E(J)
/ F' [5 g4 F# C% l8 M - '计算圆弧形部分轮廓的四个角点
% \2 t4 B3 P. Z; f - P1 = .Utility.PolarPoint(Arc.StartPoint, Arc.StartAngle, Sw / 2)* N: C' Q7 J9 t
- P2 = .Utility.PolarPoint(Arc.StartPoint, Arc.StartAngle + .Utility.AngleToReal(180, acDegrees), Sw / 2). b1 Z' G# o; T
- P3 = .Utility.PolarPoint(Arc.EndPoint, Arc.EndAngle + .Utility.AngleToReal(180, acDegrees), Ew / 2)* `" V' c. g$ G3 ^+ z$ X% x
- P4 = .Utility.PolarPoint(Arc.EndPoint, Arc.EndAngle, Ew / 2)9 W$ ?; n& D' |5 \9 K. C
- '在块中画圆弧形部分的两端直线轮廓
$ b4 B9 p3 |1 s2 ^6 e) _ - B.AddLine P1, P2( h, [, Z3 A# d7 Q* [) i3 e# Z
- B.AddLine P3, P4* ~) l, R, l' X4 u
- % p$ Z- U+ w8 l% O) d4 \
- '逐节点计算圆弧外侧轮廓样条曲线(阿基米德螺线)节点坐标0 ~. A Y0 W7 M. r& A
- For K = 0 To Bo) ~. p6 Y- c: @1 o1 ?
- '计算点坐标8 w; r( C3 \+ L* k0 L# a
- P1 = .Utility.PolarPoint(Arc.Center, Arc.StartAngle + Arc.TotalAngle / Bo * K, Arc.Radius + Sw / 2 + (Ew - Sw) / 2 / Bo * K)# ^4 ^# T% Y- V! L: U
- '把点坐标存入样条曲线节点坐标数组
. z: g$ D6 m5 }( @/ B- G5 y - Ps(K * 3) = P1(0)2 Z0 j) S; m: i' n3 d$ {
- Ps(K * 3 + 1) = P1(1)
/ \$ }& I7 O+ {: u4 ~" ~ - Ps(K * 3 + 2) = P1(2)- Y+ }5 F6 G% h9 e* z7 t( ~
- Next6 ^7 r2 U' p8 s7 F! q! ]) d! g
- '计算样条曲线起点切向
% E5 M1 c( X' G' r4 { - St(0) = Cos(Arc.StartAngle + .Utility.AngleToReal(90, acDegrees) - Atn((Ew - Sw) / 2 / Arc.TotalAngle / (Arc.Radius + Sw / 2)))
# D; I/ ]2 V' X1 O+ R. A/ B - St(1) = Sin(Arc.StartAngle + .Utility.AngleToReal(90, acDegrees) - Atn((Ew - Sw) / 2 / Arc.TotalAngle / (Arc.Radius + Sw / 2))) J) `; ?/ H6 p- U
- '计算样条曲线终点切向) Y5 A+ P- v; z) C
- Et(0) = Cos(Arc.EndAngle + .Utility.AngleToReal(90, acDegrees) - Atn((Ew - Sw) / 2 / Arc.TotalAngle / (Arc.Radius + Ew / 2)))
I+ e1 S1 @% i( ?/ t6 P7 \" g - Et(1) = Sin(Arc.EndAngle + .Utility.AngleToReal(90, acDegrees) - Atn((Ew - Sw) / 2 / Arc.TotalAngle / (Arc.Radius + Ew / 2)))) Q4 c& e3 g: t% p
- '在块中画样条曲线(圆弧部分的外侧轮廓)
) O/ W: v3 m8 C& [7 g - B.AddSpline Ps, St, Et
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- '逐节点计算圆弧内侧轮廓样条曲线(阿基米德螺线)节点坐标( v; \, O* |$ V/ m5 G9 K7 I X7 U# ~
- For K = 0 To Bo& u+ m3 T6 C& r# q* @5 |7 L
- '计算点坐标
+ h% i6 t; W4 t6 I - P1 = .Utility.PolarPoint(Arc.Center, Arc.StartAngle + Arc.TotalAngle / Bo * K, Arc.Radius - Sw / 2 - (Ew - Sw) / 2 / Bo * K), d6 J8 {) v# i
- '把点坐标存入样条曲线节点坐标数组8 ?; D* h" p# }( D
- Ps(K * 3) = P1(0)! V8 J4 \4 p O; m
- Ps(K * 3 + 1) = P1(1)
: ^3 t8 Z" l6 F' d. g2 O, L8 p - Ps(K * 3 + 2) = P1(2)
1 g" N* x& _# t$ P9 h. X/ @8 @ Q - Next
7 ?( N9 @7 A6 G - '计算样条曲线起点切向. [) h/ Y6 m' R. E2 L" }9 G
- St(0) = Cos(Arc.StartAngle + .Utility.AngleToReal(90, acDegrees) + Atn((Ew - Sw) / 2 / Arc.TotalAngle / (Arc.Radius - Sw / 2)))
+ j+ g. L5 v$ ^5 Z/ G( r2 W8 f - St(1) = Sin(Arc.StartAngle + .Utility.AngleToReal(90, acDegrees) + Atn((Ew - Sw) / 2 / Arc.TotalAngle / (Arc.Radius - Sw / 2)))
) p5 j- l( @' Z. N1 I - '计算样条曲线终点切向
, y( I6 z [- } - Et(0) = Cos(Arc.EndAngle + .Utility.AngleToReal(90, acDegrees) + Atn((Ew - Sw) / 2 / Arc.TotalAngle / (Arc.Radius - Ew / 2)))
0 u4 | u. g4 h5 n( r - Et(1) = Sin(Arc.EndAngle + .Utility.AngleToReal(90, acDegrees) + Atn((Ew - Sw) / 2 / Arc.TotalAngle / (Arc.Radius - Ew / 2)))
" q$ E7 J7 N/ Q - '在块中画样条曲线(圆弧部分的内侧轮廓)1 j1 J% }; d4 ~- ~' O' C! ^% [
- B.AddSpline Ps, St, Et# ~1 \0 r3 }8 F
- Else
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- '直线形
# t! N% b! @3 |1 P O& r -
( s Q4 e: `5 h9 i. s$ _ ? - '获取该直线部分的起始宽度和终止宽度: L1 x5 e% _% z! o; z( X
- Pl.GetWidth J, Sw, Ew
. N: k8 a9 e* c" C - Set Line = E(J)( D; h% _% y) n' d3 |
- '计算直线形部分轮廓的四个角点
' g6 B8 k \) u1 i) u6 N" i. u - P1 = .Utility.PolarPoint(Line.StartPoint, Line.Angle + .Utility.AngleToReal(90, acDegrees), Sw / 2)
( E! ^ C1 I9 x+ N' p) \ - P2 = .Utility.PolarPoint(Line.StartPoint, Line.Angle - .Utility.AngleToReal(90, acDegrees), Sw / 2)
3 b1 I2 d) {; x& O+ S2 w# L - P3 = .Utility.PolarPoint(Line.EndPoint, Line.Angle - .Utility.AngleToReal(90, acDegrees), Ew / 2)6 K( S0 ]' V) o& ?$ o
- P4 = .Utility.PolarPoint(Line.EndPoint, Line.Angle + .Utility.AngleToReal(90, acDegrees), Ew / 2)- V1 z8 z! `! ^! U
- '在块中画直线形部分的四边直线轮廓 i9 `# J; M+ b7 z; L4 ^
- B.AddLine P1, P29 U# \2 q9 K2 E! f& i! o% N
- B.AddLine P2, P3! ?8 ~2 \/ e* l4 o0 `; Z0 @
- B.AddLine P3, P40 ^' o/ A" c7 v$ M! E
- B.AddLine P4, P1
% k. W" m8 O; e% G - End If+ n# L) Y! t" l; d" l0 x1 S8 Z d
- '删除用过的分解后的图元
* |1 F: C( w! u& ^/ ~9 [ - E(J).Delete
. K6 w% g7 n' U& G. N, Y - Next% Y* w% \4 m& W
-
2 x7 F; B6 R. E - '恢复用户图层
+ m# p: r: Z; v/ r - .ActiveLayer = La/ j! p- G4 G x# |, ^1 i0 }
- '插入块参照) c* k8 u' Z) v% x; V' Z
- Ap.InsertBlock Ip, B.Name, 1, 1, 1, 0
- V3 O6 [5 _; v x! m+ o9 h - Next: M+ C" q' }- P: k
- End With: f$ u% X3 `/ b2 b+ @
-
4 A' g- {1 a9 K* L) M - '删除用过的选择集
+ U. Q* f/ g0 B5 C* _3 f - SS.Delete7 v* ]* ^9 W: S6 F7 C, E
- End Sub
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发表于 2011-7-16 15:42:15
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