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
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关键代码分享：

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void lesson31_createSkeTCh::createIPSketch()) w; o: Y* l" ]/ ]
{
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Sketch *nullSketch(NULL);
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SketchInPlaceBuilder *sketchInPlaceBuilder1;$ O4 m! ~: H0 _& L8 w
sketchInPlaceBuilder1 = workPart->Sketches()->CreateNewSketchInPlaceBuilder(nullSketch);
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sketchInPlaceBuilder1->SetPlaneOption(Sketch::PlaneOptionNewPlane);
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//sketchInPlaceBuilder1->Plane()->SetMethod(PlaneTypes::MethodTypeFixedZ);9 Q. G) n% z& k4 G" K- D! T
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// add preference8 d7 Q X# q. _' Q2 n5 h2 K
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theSession->Preferences()->Sketch()->SetContinuousAutoDimensioning(false);4 f. e% t& Y( T( ~
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Drafting::PreferencesBuilder *preferencesBuilder1;# Q5 K4 H- K4 H. \) Y3 g3 w
preferencesBuilder1 = workPart->SettingsManager()->CreatePreferencesBuilder();* t& y) |; b5 Q# D
preferencesBuilder1->AnnotationStyle()->DimensionStyle()->SetAngularDimensionValuePrecision(3);
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preferencesBuilder1->AnnotationStyle()->DimensionStyle()->SetDimensionValuePrecision(3);+ `, {2 x+ E5 C, a! K
preferencesBuilder1->Commit();
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preferencesBuilder1->Destroy();
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NXObject *nXObject1;
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nXObject1 = sketchInPlaceBuilder1->Commit();
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Sketch *sketch1(dynamic_cast<Sketch *>(nXObject1));
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Features::Feature *feature1;) `1 m; T0 _. W* @
feature1 = sketch1->Feature();
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feature1->SetName("XY-Plane-Sketch");8 H! Q' e) B4 f' B* w
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sketchInPlaceBuilder1->Destroy();$ h7 Y S# T1 i4 b& L$ l. u! z A
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//1 active sketch
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sketch1->Activate(Sketch::ViewReorientFalse);! `5 A4 W8 H8 M* p6 u* U) t" M
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double height1 = this->expressionHeight1->GetProperties()->GetDouble("Value");
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double height2 = this->expressionHeight2->GetProperties()->GetDouble("Value");9 G7 W( g/ x: E
double length = this->expressionLength->GetProperties()->GetDouble("Value"); |4 n* j6 U1 f$ {
// 2.1 create geometry- F& K; a0 E: F: u) u& R
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Point3d startPoint1(0.0, 0.0, 0.0);+ U$ N! Y. P: \" t8 n
Point3d endPoint1(0, height1, 0.0);" d& d8 @, B5 q
Point3d endPoint2(length, height1, 0.0);: W9 w3 D$ S7 C' x4 ~9 R+ W
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;5 `3 \! U! ~. b0 S# `3 s7 U
line1 = workPart->Curves()->CreateLine(startPoint1, endPoint1);6 L- N2 c/ E& W; }0 p" B1 B
line2 = workPart->Curves()->CreateLine(endPoint1, endPoint2);
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line3 = workPart->Curves()->CreateLine(endPoint2, endPoint3);3 z7 ~* J$ X2 M' u8 V
line4 = workPart->Curves()->CreateLine(endPoint3, startPoint1);; j: O! X6 E: Q7 V. j
// 2.2 add geometry( F0 m+ D) C" @3 _3 [' k4 l8 x$ |
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sketch1->AddGeometry(line1,Sketch::InferConstraintsOptionInferCoincidentConstraints);' M0 p% x) Q# I7 _, M0 F
sketch1->AddGeometry(line2,Sketch::InferConstraintsOptionInferCoincidentConstraints); P' B$ f! H D% Y6 K7 `
sketch1->AddGeometry(line3,Sketch::InferConstraintsOptionInferCoincidentConstraints);
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sketch1->AddGeometry(line4,Sketch::InferConstraintsOptionInferCoincidentConstraints);
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//3 add constraints ( gemo)$ p1 q0 d9 \( F5 u0 @1 f$ |
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Sketch::ConstraintGeometry geomline1;
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geomline1.Geometry = line1;
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geomline1.PointType = Sketch::ConstraintPointTypeNone;* B9 F E/ x6 ?& [
geomline1.SplineDefiningPointIndex = 0; [4 R d$ y( U- D
sketch1->CreateVerticalConstraint(geomline1);
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Sketch::ConstraintGeometry geomline2;! x" c8 [3 I! c' a0 h: q' F1 y2 C
geomline2.Geometry = line2;
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geomline2.PointType = Sketch::ConstraintPointTypeNone;& N2 ^6 s; ?2 ]$ S! W2 c
geomline2.SplineDefiningPointIndex = 0;
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sketch1->CreateHorizontalConstraint(geomline2);. @( [6 J! \0 N8 H4 m) E$ ~" u P9 X
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Sketch::ConstraintGeometry geomline3;; [8 p! H( |0 a1 b" @
geomline3.Geometry = line3;5 ]% e1 G; R# E* J& P
geomline3.PointType = Sketch::ConstraintPointTypeNone;
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geomline3.SplineDefiningPointIndex = 0;
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sketch1->CreateVerticalConstraint(geomline3);+ A* K5 ^! [$ K3 Y" e. I: l; H
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Sketch::ConstraintGeometry geomline1_startPoint;2 Y- d0 F! r. F
geomline1_startPoint.Geometry = line1;+ U1 M# N" r+ m! _1 {
geomline1_startPoint.PointType = Sketch::ConstraintPointTypeStartVertex;
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geomline1.SplineDefiningPointIndex = 0;
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Sketch::ConstraintGeometry geomline2_originPoint;
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geomline2_originPoint.Geometry = originPoint;
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geomline2_originPoint.PointType = Sketch::ConstraintPointTypeNone;
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geomline2_originPoint.SplineDefiningPointIndex = 0;
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sketch1->CreateCoincidentConstraint(geomline1_startPoint,geomline2_originPoint);4 g) V/ K# p* g; ^$ l% c/ W+ K/ F
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//4 add constraints (dimension)7 x5 L0 ^7 G g5 N
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NXObject *nullNXObject(NULL);
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stringstream s_height1,s_height2,s_length;
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s_height1 <<height1;
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s_height2 <<height2;/ H* j H3 H# b! Y9 ]* l* ?
s_length <<length;
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Expression *expression1,*expression2,*expression3;
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expression1 = workPart->Expressions()->CreateSystemExpression(s_height1.str());4 p( M' x6 D! `, V j W1 S
expression2 = workPart->Expressions()->CreateSystemExpression(s_length.str());2 b5 t+ G' ]3 w* C0 s
expression3 = workPart->Expressions()->CreateSystemExpression(s_height2.str());
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// line1 dimension
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Sketch::DimensionGeometry dimLine1_startPoint;
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dimLine1_startPoint.Geometry = line1;# u2 W( W' A, l, @; j/ X: u& `
dimLine1_startPoint.AssocType = Sketch::AssocTypeStartPoint;6 c% c7 G& B* ]5 N2 @' Q8 Z/ M
dimLine1_startPoint.AssocValue = 0;$ [4 r; D# _1 N9 C$ S" M5 c
dimLine1_startPoint.HelpPoint.X = 0.0;
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dimLine1_startPoint.HelpPoint.Y = 0.0;/ L" d$ l' M$ x/ L7 p
dimLine1_startPoint.HelpPoint.Z = 0.0;- m& [# |! e& y( X, d
dimLine1_startPoint.View = nullNXObject;
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Sketch::DimensionGeometry dimLine1_endPoint;/ o! m4 z P+ a; [2 _4 Y/ R
dimLine1_endPoint.Geometry = line1;- c6 \/ s5 z& w& H3 q
dimLine1_endPoint.AssocType = Sketch::AssocTypeEndPoint;
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dimLine1_endPoint.AssocValue = 0;8 P, ]/ s2 D; K# i5 o
dimLine1_endPoint.HelpPoint.X = 0.0;8 I% G; m* O% Z" ] X! t. k
dimLine1_endPoint.HelpPoint.Y = 0.0;. D) X8 l' S6 |1 @
dimLine1_endPoint.HelpPoint.Z = 0.0;' O, l. I8 A, F3 n: G
dimLine1_endPoint.View = nullNXObject;- F& W/ p5 G! \, }. h
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Point3d dimOrigin1(-100, height1/2, 0.0);
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sketch1->CreateDimension(Sketch::ConstraintTypeParallelDim, dimLine1_startPoint, dimLine1_endPoint, dimOrigin1, expression1, Sketch::DimensionOptionCreateAsDriving);
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// line2 dimension 8 v5 h' U! p$ W/ G& d: _8 ?! D
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Sketch::DimensionGeometry dimLine2_startPoint;
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dimLine2_startPoint.Geometry = line2;
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dimLine2_startPoint.AssocType = Sketch::AssocTypeStartPoint;
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dimLine2_startPoint.AssocValue = 0;
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dimLine2_startPoint.HelpPoint.X = 0.0;/ C( |7 q! F$ ~1 p$ X7 L, I! J4 n# v' L
dimLine2_startPoint.HelpPoint.Y = 0.0;) }9 h3 h. |% k. }' ^6 x3 m$ e0 t
dimLine2_startPoint.HelpPoint.Z = 0.0;8 `6 C1 O1 B- s; `) ]) t* Y
dimLine2_startPoint.View = nullNXObject;( q7 s2 u" o3 d7 U, |
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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;! x, g1 t3 `% l' Q8 M' n
dimLine2_endPoint.HelpPoint.Y = 0.0;7 U. K9 {' ^. U0 D+ q. b
dimLine2_endPoint.HelpPoint.Z = 0.0;9 X9 H, C: t" A6 N
dimLine2_endPoint.View = nullNXObject;) ^1 u0 U' u; s% p+ S
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Point3d dimOrigin2(length /2,100 + height1, 0.0);# i; Y6 @2 e7 Q, w6 w, p
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sketch1->CreateDimension(Sketch::ConstraintTypeParallelDim, dimLine2_startPoint, dimLine2_endPoint, dimOrigin2, expression2, Sketch::DimensionOptionCreateAsDriving);
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// line3 dimension
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Sketch::DimensionGeometry dimLine3_startPoint;
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dimLine3_startPoint.Geometry = line3;
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dimLine3_startPoint.AssocType = Sketch::AssocTypeStartPoint;
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dimLine3_startPoint.AssocValue = 0;. }. j/ B J/ s# N" I
dimLine3_startPoint.HelpPoint.X = 0.0;; n/ z2 y! _' K% u: c
dimLine3_startPoint.HelpPoint.Y = 0.0;6 F) b$ G5 n& O# O: M* `
dimLine3_startPoint.HelpPoint.Z = 0.0;
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dimLine3_startPoint.View = nullNXObject;! a( F# _! O$ }8 |- `- [- g
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Sketch::DimensionGeometry dimLine3_endPoint;* e; }0 U1 l6 g) F- i* ^" h: W
dimLine3_endPoint.Geometry = line3;/ z9 b3 i" u" g6 {. Z g
dimLine3_endPoint.AssocType = Sketch::AssocTypeEndPoint;
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dimLine3_endPoint.AssocValue = 0;4 k; k) N( }( U" ?5 y. e
dimLine3_endPoint.HelpPoint.X = 0.0;
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dimLine3_endPoint.HelpPoint.Y = 0.0;1 M# q1 }8 s% e3 [* A
dimLine3_endPoint.HelpPoint.Z = 0.0;# I+ O, m( @; S$ |8 a
dimLine3_endPoint.View = nullNXObject;
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Point3d dimOrigin3( 100 + length, height1-height2+ height2 /2 , 0.0); T5 W( _6 K1 k' l/ A
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sketch1->CreateDimension(Sketch::ConstraintTypeParallelDim, dimLine3_startPoint, dimLine3_endPoint, dimOrigin3, expression3, Sketch::DimensionOptionCreateAsDriving);4 F' s( H! W; x# n9 q7 U7 }; t
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//5 update & deactive' T" [. O% p8 d
sketch1->Update();
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sketch1->Deactivate(Sketch::ViewReorientFalse,Sketch::UpdateLevelModel);1 g w; F. ]' W2 x7 p
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delete expression1;
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delete expression2;8 D* f# U) n* Q, s7 c2 L4 C R, x
delete expression3;
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