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
) b8 B5 d7 A- p//获得参考平面
6 ?/ f8 f7 l9 S. X. R) H3 G1 ?" W3 bCATLISTV(CATISpecObject_var) spRefPlanes = spPart->GetReferencePlanes();
//初始化草图工厂
! e- u  l+ R8 u& gCATISkeTChFactory_var spSketchFactory(spContainer);
//在XY plane 上创建草图
CATISketch_var spSketch = spSketchFactory->CreateSketch(spRefPlanes[1]));
* j, e7 I& l6 Z/ Q* N1 F2.通过原点和两个矢量方向
. O4 w5 P4 D& V; Q该方法通过定义一个原点和两个方向 pH、pV 进行创建。
2 C4 G9 x: |! H+ ~定义原点和方向：
- q  e' ~, l8 m" u6 gdouble pOrigin[3]={0,0,10};
double pH[3]={1,0,0};
double pV[3]={0,1,0};
; |' K: n# E8 |1 q) v+ s& VCATISketchFactory_var spSketchFactory(spContainer);
" M8 r) `; E/ t  ]: lCATISketch_var spSketch = spSketchFactory->CreateSketch(pOrigin, pH, pV);

, N1 b- A1 {" }% u7 D0 X# a
sp2DFactory(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};
double pt_top_left[2] = {10, 50};
spPt_bottom_left = sketch2DFactory->CreatePoint(pt_bottom_left);
spPt_bottom_right = sketch2DFactory->CreatePoint(pt_bottom_right);
spPt_top_right = sketch2DFactory->CreatePoint(pt_top_right);
8 O9 G; j& i6 YspPt_top_left = sketch2DFactory->CreatePoint(pt_top_left);
4 r, z) k  N% V* j% e//开始创建线
CATI2DLine_var spLine1, spLine2, spLine3, spLine4;
spLine1 = sketch2DFactory->CreateLine(pt_bottom_left,pt_bottom_right);
2 k- P+ }* k# n! WspLine2 = 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);
: G: k' {7 B; B* ?, u: `9 @- U5 Q6 b//将线的首尾连接起来
, \* k9 s6 t- d* {/ U
CATI2DCurve_var spCurve1 (spLine1);
CATI2DCurve_var spCurve2 (spLine2);
5 Y4 V! A3 D- U4 v9 J" }CATI2DCurve_var spCurve3 (spLine3);
CATI2DCurve_var spCurve4 (spLine4);
spCurve1->SetStartPoint(spPt_bottom_left);
spCurve1->SetEndPoint(spPt_bottom_right);
spCurve2->SetStartPoint(spPt_bottom_right);
spCurve2->SetEndPoint(spPt_top_right);
! F* K  M4 e# Q5 SspCurve3->SetStartPoint(spPt_top_right);
spCurve3->SetEndPoint(spPt_top_left);
spCurve4->SetStartPoint(spPt_top_left);
spCurve4->SetEndPoint(spPt_bottom_left);
  @0 Y1 U0 L. g- V' c# T7 k//然后退出草图：
0 i2 E3 G$ E, @1 K- e! j4 ~spSketch->CloseEdition();
: w1 \7 K! C6 A/ K
# P2 T  k) V& g
/ D" a/ o/ `% b* h4 a1 G
. ^, S; {5 q+ W; w5 w创建草图约束
CATI2DConstraintFactory_var spConstraint2DFactory(spSketch);
//定义spLine1 为水平约束
  S5 K. }; x9 h4 g: R$ JspConstraint2DFactory->CreateConstraint( spLine1, NULL, NULL, NULL, NULL, NULL,
" h+ |( h* D/ d2 g8 INULL, Cst2DType_Horizontal, 0, 0 );
//定义spLine2 为垂直约束
- D. G% c7 s3 n" mspConstraint2DFactory->CreateConstraint( spLine2, NULL, NULL, NULL, NULL, NULL,
NULL, Cst2DType_Vertical, 0, 0 );
' U" t7 {- Z7 j4 y$ L//定义spLine3 为水平约束
  L+ |* a( K# D& _# Q3 tspConstraint2DFactory->CreateConstraint( spLine3, NULL, NULL, NULL, NULL, NULL,
NULL, Cst2DType_Horizontal, 0, 0 );
//定义spLine4 为垂直约束
spConstraint2DFactory->CreateConstraint( spLine4, NULL, NULL, NULL, NULL, NULL,
NULL, Cst2DType_Vertical, 0, 0 );
//定义spLine2 的长度约束
spConstraint2DFactory->CreateConstraint( spLine2, NULL, NULL, NULL, NULL, NULL,
# f. V' p( U# W8 aNULL, Cst2DType_Length, 0, 0 );

3 M9 F2 P* U3 w2 {$ ~3 k) B1 ]8 L//定义spLine2 与spLine4 的距离约束
( q  ?( r' N$ l) f# X9 hspConstraint2DFactory->CreateConstraint( spLine2, NULL, spLine4, NULL, NULL, NULL,
6 C( H8 H* v- t# j% L) [3 }NULL, Cst2DType_Distance, 0, 0 );
4 g5 f/ c& s+ w* Z//定义spPt_bottom_left 与X 轴的距离约束
9 f# r9 }* w4 c$ H$ R4 ?CATI2DAxis_var spSupport = NULL_var;
spSketch->GetAbsolute2DAxis(spSupport);
spConstraint2DFactory->CreateConstraint( spPt_bottom_left, NULL,
4 U( z' e* o4 D! o8 W# I* Q% s+ }7 H; P8 ~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,
$ N: `6 L& [* y( }8 {" ZspSupport->GetVDirection(), NULL, NULL, NULL, NULL,Cst2DType_Distance, 0, 0 );

/ @7 u2 x. S" j: l+ W1 j& t3 B
6 U. B% o9 X0 v( r# m