Catia二次开发源码分享：创建草图 Sketch，约束，曲线等

admin

有两种方式可以创建草图：
1.通过参考平面创建
% f# S4 i' X) r  c9 P4 }. S//获得参考平面
) i8 h- |, [$ S* T1 [# dCATLISTV(CATISpecObject_var) spRefPlanes = spPart->GetReferencePlanes();
//初始化草图工厂
9 [- _0 W* Y2 D# WCATISkeTChFactory_var spSketchFactory(spContainer);
7 l0 _9 M8 c& N7 _7 |. ]7 z//在XY plane 上创建草图
CATISketch_var spSketch = spSketchFactory->CreateSketch(spRefPlanes[1]));
& k3 o, [6 p/ A$ R. r4 b* s* Q$ c2.通过原点和两个矢量方向
2 x0 J6 ]2 R* q( ]$ P该方法通过定义一个原点和两个方向 pH、pV 进行创建。
定义原点和方向：
( }4 J2 l9 `/ o5 w1 u! @. q( ^double pOrigin[3]={0,0,10};
. {% @) q; h& }% z; w& D0 Rdouble pH[3]={1,0,0};
# z. O7 Y2 Z/ \% hdouble pV[3]={0,1,0};
CATISketchFactory_var spSketchFactory(spContainer);
CATISketch_var spSketch = spSketchFactory->CreateSketch(pOrigin, pH, pV);
8 v( d2 k. N; P# M4 P" v) h
1 y+ _; w) W4 R; K3 D! e0 e1 S
8 ~( G; N) O9 f8 p. Dsp2DFactory(spSketch);
//下面创建点
CATI2DPoint_var spPt_bottom_left, spPt_bottom_right, spPt_top_right, spPt_top_left;
double pt_bottom_left[2] = {10, 10};
double pt_bottom_right[2] = {50, 10};
double pt_top_right[2] = {50, 50};
8 h, L- N; c8 _2 X/ K" cdouble pt_top_left[2] = {10, 50};
6 z' m2 L/ ^$ Z; l+ ^6 S7 }4 mspPt_bottom_left = sketch2DFactory->CreatePoint(pt_bottom_left);
spPt_bottom_right = sketch2DFactory->CreatePoint(pt_bottom_right);
* q' l7 Q8 m8 p/ p' _8 }. \& |spPt_top_right = sketch2DFactory->CreatePoint(pt_top_right);
spPt_top_left = sketch2DFactory->CreatePoint(pt_top_left);
' _3 i$ s/ ?( [0 a, T% M# q3 d0 p//开始创建线
( y, g" ^- [5 n, r6 u, A5 ~; l6 lCATI2DLine_var spLine1, spLine2, spLine3, spLine4;
( k2 Z6 ]! N$ Z" ^1 U( zspLine1 = sketch2DFactory->CreateLine(pt_bottom_left,pt_bottom_right);
spLine2 = sketch2DFactory->CreateLine(pt_bottom_right,pt_top_right);
/ O* b, L2 F' nspLine3 = sketch2DFactory->CreateLine(pt_top_right,pt_top_left);
9 f, X% v: s' q7 `- L* W7 DspLine4 = sketch2DFactory->CreateLine(pt_top_left,pt_bottom_left);
//将线的首尾连接起来

1 C, o/ I/ o& PCATI2DCurve_var spCurve1 (spLine1);
$ b+ o# C; o- `2 vCATI2DCurve_var spCurve2 (spLine2);
CATI2DCurve_var spCurve3 (spLine3);
- j8 k; _" F1 S, M5 k& p. PCATI2DCurve_var spCurve4 (spLine4);
" O! X+ g4 e7 `  @- VspCurve1->SetStartPoint(spPt_bottom_left);
0 }5 g2 e2 y; j6 V; h, D# @" {) ZspCurve1->SetEndPoint(spPt_bottom_right);
spCurve2->SetStartPoint(spPt_bottom_right);
spCurve2->SetEndPoint(spPt_top_right);
+ U! |$ L- G" K8 i5 L; O) O* j9 zspCurve3->SetStartPoint(spPt_top_right);
. M; b0 O7 j: H/ UspCurve3->SetEndPoint(spPt_top_left);
spCurve4->SetStartPoint(spPt_top_left);
& {$ |# I' l5 h0 u1 d, espCurve4->SetEndPoint(spPt_bottom_left);
//然后退出草图：
1 a# T; D5 b2 `spSketch->CloseEdition();
( g, b+ P, S8 L3 F4 L, ~
( x& _9 j" w' q& t1 y% Z
9 b8 g, }: J5 j0 S3 R" ]
2 B' V4 x: t, g6 ?. [创建草图约束
8 r- V% k" L; r' Z+ p; oCATI2DConstraintFactory_var spConstraint2DFactory(spSketch);
//定义spLine1 为水平约束
1 Z' |- P4 P1 S; D9 G. `; C7 c+ aspConstraint2DFactory->CreateConstraint( spLine1, NULL, NULL, NULL, NULL, NULL,
: ~: C3 @( T! ^/ x" jNULL, Cst2DType_Horizontal, 0, 0 );
" H3 V! _; h+ N4 b8 q/ Z  s//定义spLine2 为垂直约束
spConstraint2DFactory->CreateConstraint( spLine2, NULL, NULL, NULL, NULL, NULL,
NULL, Cst2DType_Vertical, 0, 0 );
  J5 |6 l- j+ g7 O( p& V5 J//定义spLine3 为水平约束
spConstraint2DFactory->CreateConstraint( spLine3, NULL, NULL, NULL, NULL, NULL,
* r' G. H: [$ O; \; J2 YNULL, Cst2DType_Horizontal, 0, 0 );
9 P& @$ U' Q3 a* m6 @//定义spLine4 为垂直约束
, @$ }" b, P) R/ z7 B( g$ [) xspConstraint2DFactory->CreateConstraint( spLine4, NULL, NULL, NULL, NULL, NULL,
" p+ i6 `" R; t$ KNULL, Cst2DType_Vertical, 0, 0 );
# z" T- M! U( ]0 C0 H% x//定义spLine2 的长度约束
spConstraint2DFactory->CreateConstraint( spLine2, NULL, NULL, NULL, NULL, NULL,
+ U, D! y6 {4 R7 G: xNULL, Cst2DType_Length, 0, 0 );

& k1 X8 h$ c( {. d. V6 Y9 ~//定义spLine2 与spLine4 的距离约束
spConstraint2DFactory->CreateConstraint( spLine2, NULL, spLine4, NULL, NULL, NULL,
NULL, Cst2DType_Distance, 0, 0 );
//定义spPt_bottom_left 与X 轴的距离约束
- c: p" ^( R* A: |! E7 aCATI2DAxis_var spSupport = NULL_var;
' y. o+ k7 P2 E. e( |5 m* x0 LspSketch->GetAbsolute2DAxis(spSupport);
spConstraint2DFactory->CreateConstraint( spPt_bottom_left, NULL,
spSupport->GetHDirection(), NULL, NULL, NULL, NULL,Cst2DType_Distance, 0, 0 );
//定义spPt_bottom_left 与Y 轴的距离约束
& l% [. i+ d: i8 E5 FspConstraint2DFactory->CreateConstraint( spPt_bottom_left, NULL,
spSupport->GetVDirection(), NULL, NULL, NULL, NULL,Cst2DType_Distance, 0, 0 );
! {( V) m# h/ ^3 x$ F1 _
, S3 M/ Y+ @6 G, D+ Y* v8 I- U