PLM之家-NX9.0 二次开发实例视频31 NXOpen C++创建草图基本特征

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PLM之家-NX9.0 二次开发实例视频31 NXOpen C++创建基本特征 <1>-草图的创建
内容：
草图作为参数化建模的基础，使用代码实现草图的创建过程，主要是对草图环境的初始化，以及草图约束的添加等问题。
目的：
在NX中，使用NXOpen C++可以很方便的进行JA的录制，从而发掘草图约束中尺寸约束和几何约束的规律，通过这种方式，可以快速的完成开发。

NXOpen C++创建草图基本特征

31 NXOpen C++创建基本特征-草图的创建(1)项目介绍
31 NXOpen C++创建基本特征-草图的创建(2)UI设计
31 NXOpen C++创建基本特征-草图的创建(3)项目创建
31 NXOpen C++创建基本特征-草图的创建(4)草图特征创建
31 NXOpen C++创建基本特征-草图的创建(5)添加几何到草图
31 NXOpen C++创建基本特征-草图的创建(6)添加草图几何约束
31 NXOpen C++创建基本特征-草图的创建(7)添加草图尺寸约束
31 NXOpen C++创建基本特征-草图的创建(8)尺寸和UI关联! W# Y6 D5 C) |, }4 Q, `

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关键代码分享：

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void lesson31_createSkeTCh::createIPSketch()
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{
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Sketch *nullSketch(NULL);
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SketchInPlaceBuilder *sketchInPlaceBuilder1;' ^3 t7 s' C" s7 e! \ C) z2 _
sketchInPlaceBuilder1 = workPart->Sketches()->CreateNewSketchInPlaceBuilder(nullSketch);$ [9 A' M( \) T! |* S( A b
sketchInPlaceBuilder1->SetPlaneOption(Sketch::PlaneOptionNewPlane);0 j* N# ^ I3 g3 d
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//sketchInPlaceBuilder1->Plane()->SetMethod(PlaneTypes::MethodTypeFixedZ);4 }+ _1 m6 ?; B
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// add preference
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theSession->Preferences()->Sketch()->SetContinuousAutoDimensioning(false);% q/ r: t9 N5 p" g t' k
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Drafting::PreferencesBuilder *preferencesBuilder1;
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preferencesBuilder1 = workPart->SettingsManager()->CreatePreferencesBuilder();8 |! K9 H7 X( l' A3 b
preferencesBuilder1->AnnotationStyle()->DimensionStyle()->SetAngularDimensionValuePrecision(3);
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preferencesBuilder1->AnnotationStyle()->DimensionStyle()->SetDimensionValuePrecision(3);
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preferencesBuilder1->Commit();9 `- }$ q0 v0 ^2 l
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preferencesBuilder1->Destroy();
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NXObject *nXObject1;
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nXObject1 = sketchInPlaceBuilder1->Commit();8 i, p) w; i, }7 w6 t' {% `# I
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Sketch *sketch1(dynamic_cast<Sketch *>(nXObject1));! h& G0 _% q, ^3 S5 m
Features::Feature *feature1;
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feature1 = sketch1->Feature();
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feature1->SetName("XY-Plane-Sketch");9 q' `* m$ C9 t8 h) ^4 o7 l; f n
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sketchInPlaceBuilder1->Destroy();; F" ]1 s" G4 q/ o
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//1 active sketch
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sketch1->Activate(Sketch::ViewReorientFalse);$ P; u0 L. [8 b
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double height1 = this->expressionHeight1->GetProperties()->GetDouble("Value");
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double height2 = this->expressionHeight2->GetProperties()->GetDouble("Value");; u3 q+ ]& p5 R* U) `. o; ~* q6 L
double length = this->expressionLength->GetProperties()->GetDouble("Value");
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// 2.1 create geometry; s) E2 I) A. @* P* F% m
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Point3d startPoint1(0.0, 0.0, 0.0);
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Point3d endPoint1(0, height1, 0.0);
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Point3d endPoint2(length, height1, 0.0);
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Point3d endPoint3(length, height1-height2, 0.0);
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Point3d origin = sketch1->Origin();
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Point *originPoint = workPart->Points()->CreatePoint(origin);
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Line *line1,*line2,*line3,*line4;$ C' z$ P6 d9 X* L
line1 = workPart->Curves()->CreateLine(startPoint1, endPoint1);! ?1 F1 B. Q9 N# Q
line2 = workPart->Curves()->CreateLine(endPoint1, endPoint2);
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line3 = workPart->Curves()->CreateLine(endPoint2, endPoint3);
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line4 = workPart->Curves()->CreateLine(endPoint3, startPoint1);, F+ g% X5 A3 m
// 2.2 add geometry
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sketch1->AddGeometry(line1,Sketch::InferConstraintsOptionInferCoincidentConstraints);
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sketch1->AddGeometry(line2,Sketch::InferConstraintsOptionInferCoincidentConstraints);
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sketch1->AddGeometry(line3,Sketch::InferConstraintsOptionInferCoincidentConstraints);
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sketch1->AddGeometry(line4,Sketch::InferConstraintsOptionInferCoincidentConstraints);! z5 m$ _9 ^: b1 c( n- f3 G' z
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//3 add constraints ( gemo)0 ^6 Q' _% x; t) y8 E& ]
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Sketch::ConstraintGeometry geomline1;* E b4 e2 ]" u5 ?+ `: Z. [3 M8 D
geomline1.Geometry = line1;
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geomline1.PointType = Sketch::ConstraintPointTypeNone;7 R6 Z* v0 M' B8 a- G" U3 q
geomline1.SplineDefiningPointIndex = 0;4 z4 }3 \/ n3 T
sketch1->CreateVerticalConstraint(geomline1);
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Sketch::ConstraintGeometry geomline2;9 D6 s& m/ {4 q0 ^! M' _4 G
geomline2.Geometry = line2;8 P0 J \! ]& R! p
geomline2.PointType = Sketch::ConstraintPointTypeNone;/ T/ G* G- W/ Y/ X) X' D
geomline2.SplineDefiningPointIndex = 0;
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sketch1->CreateHorizontalConstraint(geomline2);
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Sketch::ConstraintGeometry geomline3;4 {4 `6 Y7 q8 @; H
geomline3.Geometry = line3;
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geomline3.PointType = Sketch::ConstraintPointTypeNone;
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geomline3.SplineDefiningPointIndex = 0;
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sketch1->CreateVerticalConstraint(geomline3);
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Sketch::ConstraintGeometry geomline1_startPoint;
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geomline1_startPoint.Geometry = line1;
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geomline1_startPoint.PointType = Sketch::ConstraintPointTypeStartVertex;- U$ Z) C" w5 q0 F5 y& b
geomline1.SplineDefiningPointIndex = 0;
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Sketch::ConstraintGeometry geomline2_originPoint;1 p" Y0 Q9 S. o7 m5 _/ @# H
geomline2_originPoint.Geometry = originPoint;6 p R7 f% n" [& G
geomline2_originPoint.PointType = Sketch::ConstraintPointTypeNone;
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geomline2_originPoint.SplineDefiningPointIndex = 0;
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sketch1->CreateCoincidentConstraint(geomline1_startPoint,geomline2_originPoint);+ a5 P! I R& R
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//4 add constraints (dimension)
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NXObject *nullNXObject(NULL);! G. q! G% n) y2 \! }6 K
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stringstream s_height1,s_height2,s_length;: m' H/ e9 e" D) C. G2 @! N
s_height1 <<height1;
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s_height2 <<height2;$ G- b5 i1 u7 y1 y2 Q" A6 z
s_length <<length;
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Expression *expression1,*expression2,*expression3;
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expression1 = workPart->Expressions()->CreateSystemExpression(s_height1.str());' ]: f& \- Y3 \
expression2 = workPart->Expressions()->CreateSystemExpression(s_length.str());
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expression3 = workPart->Expressions()->CreateSystemExpression(s_height2.str());
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// line1 dimension
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Sketch::DimensionGeometry dimLine1_startPoint;+ ~2 T5 r1 ~3 W: b3 J) o8 P% P
dimLine1_startPoint.Geometry = line1;
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dimLine1_startPoint.AssocType = Sketch::AssocTypeStartPoint;
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dimLine1_startPoint.AssocValue = 0;
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dimLine1_startPoint.HelpPoint.X = 0.0;4 h4 y& y! g+ \- r8 {% @) B- P' _
dimLine1_startPoint.HelpPoint.Y = 0.0;# h* ?, s1 Q5 H- ?( Q/ G
dimLine1_startPoint.HelpPoint.Z = 0.0;/ g! v' S. j3 M$ E0 V, w
dimLine1_startPoint.View = nullNXObject;! S- B# g% s2 e0 S6 ]- v5 H; G" l
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Sketch::DimensionGeometry dimLine1_endPoint;- [/ E3 t+ Q8 r( f
dimLine1_endPoint.Geometry = line1;( w& e B. c* N' S" O" q: I1 m
dimLine1_endPoint.AssocType = Sketch::AssocTypeEndPoint;
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dimLine1_endPoint.AssocValue = 0;" j0 O) Z1 ]2 z7 i- o! C; [4 G
dimLine1_endPoint.HelpPoint.X = 0.0;$ S# A# t- T2 }$ l6 R
dimLine1_endPoint.HelpPoint.Y = 0.0;
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dimLine1_endPoint.HelpPoint.Z = 0.0;
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dimLine1_endPoint.View = nullNXObject;
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Point3d dimOrigin1(-100, height1/2, 0.0);# ^% M8 ?. N: a: B. ~& f
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sketch1->CreateDimension(Sketch::ConstraintTypeParallelDim, dimLine1_startPoint, dimLine1_endPoint, dimOrigin1, expression1, Sketch::DimensionOptionCreateAsDriving);! u6 y7 X* @+ X2 ?
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// line2 dimension : ~. Z/ O! k2 s1 |) j/ q/ N
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Sketch::DimensionGeometry dimLine2_startPoint;
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dimLine2_startPoint.Geometry = line2;1 m! }! X( N% R* U$ D* @/ M
dimLine2_startPoint.AssocType = Sketch::AssocTypeStartPoint;
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dimLine2_startPoint.AssocValue = 0;
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dimLine2_startPoint.HelpPoint.X = 0.0;
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dimLine2_startPoint.HelpPoint.Y = 0.0;0 ]! G6 Y; [6 m/ f9 R2 W
dimLine2_startPoint.HelpPoint.Z = 0.0;+ j7 z$ j" ^4 S* n# t
dimLine2_startPoint.View = nullNXObject;) P) b4 G' N% ^' c" `7 w
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Sketch::DimensionGeometry dimLine2_endPoint;
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dimLine2_endPoint.Geometry = line2;
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dimLine2_endPoint.AssocType = Sketch::AssocTypeEndPoint;
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dimLine2_endPoint.AssocValue = 0;
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dimLine2_endPoint.HelpPoint.X = 0.0;
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dimLine2_endPoint.HelpPoint.Y = 0.0;( u; A2 T( q- u- t
dimLine2_endPoint.HelpPoint.Z = 0.0;! S7 \/ q3 M7 G0 k9 m
dimLine2_endPoint.View = nullNXObject;
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Point3d dimOrigin2(length /2,100 + height1, 0.0);5 \, W9 [, e4 |2 b: A, M; H+ \
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sketch1->CreateDimension(Sketch::ConstraintTypeParallelDim, dimLine2_startPoint, dimLine2_endPoint, dimOrigin2, expression2, Sketch::DimensionOptionCreateAsDriving);1 c% Y( x! p& |% q1 j; T& a
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// line3 dimension . S- F& z, J Y
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Sketch::DimensionGeometry dimLine3_startPoint; g7 h$ R: ^& B6 q
dimLine3_startPoint.Geometry = line3;
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dimLine3_startPoint.AssocType = Sketch::AssocTypeStartPoint;
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dimLine3_startPoint.AssocValue = 0;2 ~0 Y8 d' H, ]* y8 A. n3 v A
dimLine3_startPoint.HelpPoint.X = 0.0;& z2 j+ m2 P1 q4 C
dimLine3_startPoint.HelpPoint.Y = 0.0;
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dimLine3_startPoint.HelpPoint.Z = 0.0;
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dimLine3_startPoint.View = nullNXObject;
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Sketch::DimensionGeometry dimLine3_endPoint;
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dimLine3_endPoint.Geometry = line3;
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dimLine3_endPoint.AssocType = Sketch::AssocTypeEndPoint;
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dimLine3_endPoint.AssocValue = 0;
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dimLine3_endPoint.HelpPoint.X = 0.0;: x* `9 ?' T. D! t$ G
dimLine3_endPoint.HelpPoint.Y = 0.0;
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dimLine3_endPoint.HelpPoint.Z = 0.0;
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dimLine3_endPoint.View = nullNXObject;
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Point3d dimOrigin3( 100 + length, height1-height2+ height2 /2 , 0.0);) X8 |% ?/ k/ A. G# v
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sketch1->CreateDimension(Sketch::ConstraintTypeParallelDim, dimLine3_startPoint, dimLine3_endPoint, dimOrigin3, expression3, Sketch::DimensionOptionCreateAsDriving);
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//5 update & deactive
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sketch1->Update();
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sketch1->Deactivate(Sketch::ViewReorientFalse,Sketch::UpdateLevelModel);
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delete expression1;: r# j6 I' B2 ]( V& y: n
delete expression2;0 m7 H3 C8 Z% Q/ B3 W
delete expression3;% S; @. _0 Q# n- A
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