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：
/ \/ |! X. H" k& a1.通过参考平面创建
//获得参考平面
CATLISTV(CATISpecObject_var) spRefPlanes = spPart->GetReferencePlanes();
5 v5 I4 n" r3 n* F+ o+ p5 e, k//初始化草图工厂
- o" [1 h% ?3 h) O  J+ aCATISkeTChFactory_var spSketchFactory(spContainer);
//在XY plane 上创建草图
6 ]) _9 @, h6 v. xCATISketch_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。
: |# A/ E; b  `3 i; Y4 ^% T定义原点和方向：
double pOrigin[3]={0,0,10};
2 r- y6 `& |2 r+ Ydouble pH[3]={1,0,0};
" Z5 V: U1 K/ N# hdouble pV[3]={0,1,0};
5 _3 r% y, ~. ?+ @1 }( v4 dCATISketchFactory_var spSketchFactory(spContainer);
. k5 E/ {% e6 S. s! D  @7 s$ ICATISketch_var spSketch = spSketchFactory->CreateSketch(pOrigin, pH, pV);
* P1 ]' |. `) x; [# w+ k! @( m
+ m% f2 ~2 d! U0 o: n# J
sp2DFactory(spSketch);
//下面创建点
5 t; `, y7 s6 j! @7 vCATI2DPoint_var spPt_bottom_left, spPt_bottom_right, spPt_top_right, spPt_top_left;
double pt_bottom_left[2] = {10, 10};
6 [4 z# \/ i8 A: ~" @3 S7 Fdouble pt_bottom_right[2] = {50, 10};
1 A8 q! |, T: y- cdouble pt_top_right[2] = {50, 50};
double pt_top_left[2] = {10, 50};
spPt_bottom_left = sketch2DFactory->CreatePoint(pt_bottom_left);
6 C9 {$ b; H: G  P5 ]; j, rspPt_bottom_right = sketch2DFactory->CreatePoint(pt_bottom_right);
& q/ R+ U" D% @* Q. n7 GspPt_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;
$ d' E0 O. }+ `/ F* xspLine1 = sketch2DFactory->CreateLine(pt_bottom_left,pt_bottom_right);
spLine2 = sketch2DFactory->CreateLine(pt_bottom_right,pt_top_right);
+ E  i+ r. o( |. MspLine3 = sketch2DFactory->CreateLine(pt_top_right,pt_top_left);
spLine4 = sketch2DFactory->CreateLine(pt_top_left,pt_bottom_left);
//将线的首尾连接起来

CATI2DCurve_var spCurve1 (spLine1);
CATI2DCurve_var spCurve2 (spLine2);
CATI2DCurve_var spCurve3 (spLine3);
CATI2DCurve_var spCurve4 (spLine4);
3 j2 U3 W! w+ A# v2 L- K- w4 hspCurve1->SetStartPoint(spPt_bottom_left);
# \# @1 G4 I0 Z9 q' U2 z- M( QspCurve1->SetEndPoint(spPt_bottom_right);
spCurve2->SetStartPoint(spPt_bottom_right);
spCurve2->SetEndPoint(spPt_top_right);
2 ]" D0 B' P& c3 u0 K9 ~, C5 SspCurve3->SetStartPoint(spPt_top_right);
; r! ~* N+ _3 _8 @7 n$ @7 BspCurve3->SetEndPoint(spPt_top_left);
8 K( Y( z) o/ z$ `spCurve4->SetStartPoint(spPt_top_left);
spCurve4->SetEndPoint(spPt_bottom_left);
//然后退出草图：
spSketch->CloseEdition();



创建草图约束
CATI2DConstraintFactory_var spConstraint2DFactory(spSketch);
6 K! |+ k$ U/ x$ ?3 @9 |//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
- R, h& a" X2 E  b# ?3 _( Q, rspConstraint2DFactory->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,
6 A/ V! {$ `# T. q: B! k: tNULL, 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 );
: C" I2 `, @8 l/ k//定义spLine2 的长度约束
spConstraint2DFactory->CreateConstraint( spLine2, NULL, NULL, NULL, NULL, NULL,
NULL, Cst2DType_Length, 0, 0 );

//定义spLine2 与spLine4 的距离约束
spConstraint2DFactory->CreateConstraint( spLine2, NULL, spLine4, NULL, NULL, NULL,
& s- U. }3 N( }  u3 F9 i3 I3 Z  ONULL, Cst2DType_Distance, 0, 0 );
) d6 S9 D$ i4 \" Z//定义spPt_bottom_left 与X 轴的距离约束
+ H5 T, g, I. Z2 lCATI2DAxis_var spSupport = NULL_var;
0 i% V; k! y( [. U5 O5 AspSketch->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
  n5 t6 \$ V% ^5 ~spConstraint2DFactory->CreateConstraint( spPt_bottom_left, NULL,
spSupport->GetVDirection(), NULL, NULL, NULL, NULL,Cst2DType_Distance, 0, 0 );