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：
' z; \5 u, W5 I: n1.通过参考平面创建
9 a9 N' O: l4 W& j, Q% H% d//获得参考平面
& h, I. b, W% d8 _1 VCATLISTV(CATISpecObject_var) spRefPlanes = spPart->GetReferencePlanes();
//初始化草图工厂
CATISkeTChFactory_var spSketchFactory(spContainer);
//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
该方法通过定义一个原点和两个方向 pH、pV 进行创建。
% C1 r' }' S4 a( H) `# V/ ?定义原点和方向：
& C' Q/ d1 u9 n# @double pOrigin[3]={0,0,10};
  G; B; ]9 x- ~double pH[3]={1,0,0};
double pV[3]={0,1,0};
5 V6 H6 H& m( D4 b1 x3 J8 iCATISketchFactory_var spSketchFactory(spContainer);
CATISketch_var spSketch = spSketchFactory->CreateSketch(pOrigin, pH, pV);
( y- [6 g- b8 v8 }+ H2 z9 X1 x

sp2DFactory(spSketch);
0 L% g4 g+ s: E" T' O$ M//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};
- f3 p1 k$ h) w* Ldouble pt_bottom_right[2] = {50, 10};
7 ?1 i) ~5 \6 N9 F+ h4 h- \double pt_top_right[2] = {50, 50};
; I* i6 R. g- Sdouble pt_top_left[2] = {10, 50};
spPt_bottom_left = sketch2DFactory->CreatePoint(pt_bottom_left);
spPt_bottom_right = sketch2DFactory->CreatePoint(pt_bottom_right);
- ?) A0 v+ @7 q  ]  xspPt_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; L' S7 \/ F( ?spLine1 = 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);
1 x1 T3 D2 v# ]3 ]spLine4 = sketch2DFactory->CreateLine(pt_top_left,pt_bottom_left);
( x( w  F9 A4 N+ x% v//将线的首尾连接起来
" H  e3 [6 @. }9 U2 D) A
CATI2DCurve_var spCurve1 (spLine1);
CATI2DCurve_var spCurve2 (spLine2);
# e+ H2 I* `# }) k* VCATI2DCurve_var spCurve3 (spLine3);
( A; \# ?& R0 ^2 q( M( RCATI2DCurve_var spCurve4 (spLine4);
* A" b9 W. ]# ]# KspCurve1->SetStartPoint(spPt_bottom_left);
spCurve1->SetEndPoint(spPt_bottom_right);
spCurve2->SetStartPoint(spPt_bottom_right);
5 B1 O, U0 |+ E/ ospCurve2->SetEndPoint(spPt_top_right);
spCurve3->SetStartPoint(spPt_top_right);
3 l, M% J. ?# b' T  |& t" EspCurve3->SetEndPoint(spPt_top_left);
spCurve4->SetStartPoint(spPt_top_left);
spCurve4->SetEndPoint(spPt_bottom_left);
  P0 f/ L* d" l) R: S  ?//然后退出草图：
6 u$ W. p3 u4 a; YspSketch->CloseEdition();

" p3 c" K$ }# `: C+ d" `
! r5 E, \$ A$ P  h+ ]% a
创建草图约束
) I$ s; C9 L- I3 W1 XCATI2DConstraintFactory_var spConstraint2DFactory(spSketch);
: p  M! [1 m3 h% N/ [5 Z//定义spLine1 为水平约束
spConstraint2DFactory->CreateConstraint( spLine1, NULL, NULL, NULL, NULL, NULL,
NULL, Cst2DType_Horizontal, 0, 0 );
//定义spLine2 为垂直约束
spConstraint2DFactory->CreateConstraint( spLine2, NULL, NULL, NULL, NULL, NULL,
( @- D5 [/ Y, J+ eNULL, Cst2DType_Vertical, 0, 0 );
//定义spLine3 为水平约束
! g& B$ m# D% i& p2 BspConstraint2DFactory->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,
! i. u: C: J# ]" N2 a$ \, VNULL, Cst2DType_Vertical, 0, 0 );
* j0 j7 L; o0 T2 }: `//定义spLine2 的长度约束
spConstraint2DFactory->CreateConstraint( spLine2, NULL, NULL, NULL, NULL, NULL,
NULL, Cst2DType_Length, 0, 0 );

+ f5 f" m1 a' y6 J7 v//定义spLine2 与spLine4 的距离约束
spConstraint2DFactory->CreateConstraint( spLine2, NULL, spLine4, NULL, NULL, NULL,
NULL, Cst2DType_Distance, 0, 0 );
% p( c8 u5 u6 x  \. Z* l//定义spPt_bottom_left 与X 轴的距离约束
! ~& a  B' z5 T. ~! n# I5 ^CATI2DAxis_var spSupport = NULL_var;
spSketch->GetAbsolute2DAxis(spSupport);
1 M0 w; }+ M6 L4 a( k+ espConstraint2DFactory->CreateConstraint( spPt_bottom_left, NULL,
spSupport->GetHDirection(), NULL, NULL, NULL, NULL,Cst2DType_Distance, 0, 0 );
2 E% c& a( q. s8 X% j0 H1 E( _; p//定义spPt_bottom_left 与Y 轴的距离约束
  ^- w& c& w" U  \) y( i% p( JspConstraint2DFactory->CreateConstraint( spPt_bottom_left, NULL,
# g4 ?8 K5 i6 a* gspSupport->GetVDirection(), NULL, NULL, NULL, NULL,Cst2DType_Distance, 0, 0 );