Catia二次开发源码分享：创建草图 Sketch，约束，曲线等

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有两种方式可以创建草图：
9 A3 n$ }$ s$ ]4 G1 v6 H1.通过参考平面创建
( J; x6 H2 X$ n, ?0 w6 w//获得参考平面
CATLISTV(CATISpecObject_var) spRefPlanes = spPart->GetReferencePlanes();
* b6 u1 }4 d# Y8 d; j//初始化草图工厂
6 z  k. H/ g  K) r. k% MCATISkeTChFactory_var spSketchFactory(spContainer);
8 w8 J* b/ Q7 |3 I" f. G//在XY plane 上创建草图
CATISketch_var spSketch = spSketchFactory->CreateSketch(spRefPlanes[1]));
2.通过原点和两个矢量方向
0 m1 f- I6 C, [$ o" r该方法通过定义一个原点和两个方向 pH、pV 进行创建。
( u4 k# r5 f' N7 J% P定义原点和方向：
7 W3 e9 _' t9 o$ Tdouble pOrigin[3]={0,0,10};
double pH[3]={1,0,0};
double pV[3]={0,1,0};
CATISketchFactory_var spSketchFactory(spContainer);
& ^* @/ Y7 m, KCATISketch_var spSketch = spSketchFactory->CreateSketch(pOrigin, pH, pV);
) M8 ^$ c" |7 K% ~

- f0 X& K- \) h9 b* Tsp2DFactory(spSketch);
5 O0 v* _: l" w( D' K//下面创建点
CATI2DPoint_var spPt_bottom_left, spPt_bottom_right, spPt_top_right, spPt_top_left;
5 ^+ t1 U( c, p) E* J5 Z5 K8 qdouble pt_bottom_left[2] = {10, 10};
6 G8 d% e; j9 A( |9 _7 |double pt_bottom_right[2] = {50, 10};
" d3 C1 v, Z- x2 f' o& x( M' ndouble pt_top_right[2] = {50, 50};
double pt_top_left[2] = {10, 50};
' `, y7 u! l# y( PspPt_bottom_left = sketch2DFactory->CreatePoint(pt_bottom_left);
spPt_bottom_right = sketch2DFactory->CreatePoint(pt_bottom_right);
spPt_top_right = sketch2DFactory->CreatePoint(pt_top_right);
spPt_top_left = sketch2DFactory->CreatePoint(pt_top_left);
//开始创建线
CATI2DLine_var spLine1, spLine2, spLine3, spLine4;
$ r( d8 X1 |$ k8 A! W0 JspLine1 = sketch2DFactory->CreateLine(pt_bottom_left,pt_bottom_right);
spLine2 = sketch2DFactory->CreateLine(pt_bottom_right,pt_top_right);
spLine3 = sketch2DFactory->CreateLine(pt_top_right,pt_top_left);
spLine4 = sketch2DFactory->CreateLine(pt_top_left,pt_bottom_left);
' p" j6 ]. D2 Z4 a//将线的首尾连接起来
+ M& x* H" \0 r
CATI2DCurve_var spCurve1 (spLine1);
CATI2DCurve_var spCurve2 (spLine2);
/ }: \0 s# L2 G! h! ~8 P3 {) pCATI2DCurve_var spCurve3 (spLine3);
CATI2DCurve_var spCurve4 (spLine4);
1 H! R4 @, u" S0 D; mspCurve1->SetStartPoint(spPt_bottom_left);
spCurve1->SetEndPoint(spPt_bottom_right);
6 r* Q% ^9 `0 j, {6 tspCurve2->SetStartPoint(spPt_bottom_right);
spCurve2->SetEndPoint(spPt_top_right);
spCurve3->SetStartPoint(spPt_top_right);
spCurve3->SetEndPoint(spPt_top_left);
) B" G6 W! z4 z# d  |5 b; espCurve4->SetStartPoint(spPt_top_left);
spCurve4->SetEndPoint(spPt_bottom_left);
9 @7 f5 S/ R( Y//然后退出草图：
spSketch->CloseEdition();



创建草图约束
' ^; h/ h9 T  u1 ACATI2DConstraintFactory_var spConstraint2DFactory(spSketch);
//定义spLine1 为水平约束
+ [  x; K$ ]$ p! U7 _* H/ M, GspConstraint2DFactory->CreateConstraint( spLine1, NULL, NULL, NULL, NULL, NULL,
+ g9 r, i# a) }% ONULL, Cst2DType_Horizontal, 0, 0 );
//定义spLine2 为垂直约束
spConstraint2DFactory->CreateConstraint( spLine2, NULL, NULL, NULL, NULL, NULL,
NULL, Cst2DType_Vertical, 0, 0 );
//定义spLine3 为水平约束
spConstraint2DFactory->CreateConstraint( spLine3, NULL, NULL, NULL, NULL, NULL,
. `# S# C$ {2 fNULL, Cst2DType_Horizontal, 0, 0 );
//定义spLine4 为垂直约束
spConstraint2DFactory->CreateConstraint( spLine4, NULL, NULL, NULL, NULL, NULL,
9 A# F) Z7 U  s/ @* ?  G" nNULL, Cst2DType_Vertical, 0, 0 );
5 L/ H. J" N  _2 y* l- f//定义spLine2 的长度约束
spConstraint2DFactory->CreateConstraint( spLine2, NULL, NULL, NULL, NULL, NULL,
/ V, d0 R/ D. D  ~3 ?' h" NNULL, Cst2DType_Length, 0, 0 );
1 q1 ?  k0 s4 d9 e( ?- Z1 E
8 y+ }+ }% ]0 @4 l* Z; d//定义spLine2 与spLine4 的距离约束
5 `) M7 f+ Q6 R/ ?# d, R+ PspConstraint2DFactory->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
CATI2DAxis_var spSupport = NULL_var;
spSketch->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
spConstraint2DFactory->CreateConstraint( spPt_bottom_left, NULL,
- ~8 I. H1 g8 ~( J- ]" ^spSupport->GetVDirection(), NULL, NULL, NULL, NULL,Cst2DType_Distance, 0, 0 );
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