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' s: Z! z7 C' T7 [

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关键代码分享：

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void lesson31_createSkeTCh::createIPSketch()& l; M+ z1 p5 O, `# h8 D8 N: m
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Sketch *nullSketch(NULL);" V' b+ M7 p6 c
SketchInPlaceBuilder *sketchInPlaceBuilder1;! f9 @- f* S) h) `8 f' C+ y
sketchInPlaceBuilder1 = workPart->Sketches()->CreateNewSketchInPlaceBuilder(nullSketch);& U1 B" j' B% p$ ]$ J6 Z5 t
sketchInPlaceBuilder1->SetPlaneOption(Sketch::PlaneOptionNewPlane);' t. H: I4 F0 K J' U
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//sketchInPlaceBuilder1->Plane()->SetMethod(PlaneTypes::MethodTypeFixedZ);0 J4 Y4 `; `' j$ a
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// add preference1 g5 b! n2 S) l; g% C' D
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theSession->Preferences()->Sketch()->SetContinuousAutoDimensioning(false);
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Drafting::PreferencesBuilder *preferencesBuilder1;; P+ v; L% A2 ]6 \
preferencesBuilder1 = workPart->SettingsManager()->CreatePreferencesBuilder();6 [# s) B1 @6 _4 j
preferencesBuilder1->AnnotationStyle()->DimensionStyle()->SetAngularDimensionValuePrecision(3);
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preferencesBuilder1->AnnotationStyle()->DimensionStyle()->SetDimensionValuePrecision(3);2 h. s2 G4 s2 j7 ]
preferencesBuilder1->Commit();
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preferencesBuilder1->Destroy();% P$ ~ g' r& i* Q' F& M
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NXObject *nXObject1;
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nXObject1 = sketchInPlaceBuilder1->Commit();9 j5 ]7 J* \' t' X# P' f6 t
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Sketch *sketch1(dynamic_cast<Sketch *>(nXObject1));
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Features::Feature *feature1;
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feature1 = sketch1->Feature();0 W( i3 @$ w( V J, A
feature1->SetName("XY-Plane-Sketch");
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sketchInPlaceBuilder1->Destroy();
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//1 active sketch
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sketch1->Activate(Sketch::ViewReorientFalse); Q: s# B) e, n5 c e4 N+ a
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double height1 = this->expressionHeight1->GetProperties()->GetDouble("Value");
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double height2 = this->expressionHeight2->GetProperties()->GetDouble("Value");" G) R5 Q* h+ I, K& M6 o, d
double length = this->expressionLength->GetProperties()->GetDouble("Value");# j3 a6 j+ p( I. U; x6 }; C5 }
// 2.1 create geometry
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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();# B6 \" V- H" V. N; O0 L7 Y
Point *originPoint = workPart->Points()->CreatePoint(origin);. D6 C/ h B# ^# u) [- B6 N
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Line *line1,*line2,*line3,*line4;
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line1 = workPart->Curves()->CreateLine(startPoint1, endPoint1);3 S# \5 d6 H& s7 g, u
line2 = workPart->Curves()->CreateLine(endPoint1, endPoint2);3 c$ x# }1 e; f! x6 C! E
line3 = workPart->Curves()->CreateLine(endPoint2, endPoint3);/ Y7 b8 H! z l8 M- O7 z! |( o
line4 = workPart->Curves()->CreateLine(endPoint3, startPoint1);
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// 2.2 add geometry
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sketch1->AddGeometry(line1,Sketch::InferConstraintsOptionInferCoincidentConstraints);3 I3 L$ C7 N2 z& Y; c& }7 C; `
sketch1->AddGeometry(line2,Sketch::InferConstraintsOptionInferCoincidentConstraints);
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sketch1->AddGeometry(line3,Sketch::InferConstraintsOptionInferCoincidentConstraints);8 R2 Y9 t* d o3 |: ~( h
sketch1->AddGeometry(line4,Sketch::InferConstraintsOptionInferCoincidentConstraints);# r2 ]" @: J4 ^8 e! g
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//3 add constraints ( gemo)
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Sketch::ConstraintGeometry geomline1;
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geomline1.Geometry = line1;
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geomline1.PointType = Sketch::ConstraintPointTypeNone;
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geomline1.SplineDefiningPointIndex = 0;
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sketch1->CreateVerticalConstraint(geomline1);0 K. O' {( o0 F$ L
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Sketch::ConstraintGeometry geomline2;5 o# P" ?. l+ d; H# ^5 D! u
geomline2.Geometry = line2;
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geomline2.PointType = Sketch::ConstraintPointTypeNone;+ y) T6 U" w4 t! {9 V& w7 F
geomline2.SplineDefiningPointIndex = 0;
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sketch1->CreateHorizontalConstraint(geomline2);
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Sketch::ConstraintGeometry geomline3;
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geomline3.Geometry = line3;" ^2 L* Q4 i0 A9 P6 I. X
geomline3.PointType = Sketch::ConstraintPointTypeNone;4 z9 z; q8 {4 Z
geomline3.SplineDefiningPointIndex = 0;- I' \' p) a. A
sketch1->CreateVerticalConstraint(geomline3);9 ~& s9 R1 A) {# P; ?. B
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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;
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geomline1.SplineDefiningPointIndex = 0;
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Sketch::ConstraintGeometry geomline2_originPoint;# H+ k! M, D. j+ |$ P& M9 R
geomline2_originPoint.Geometry = originPoint;
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geomline2_originPoint.PointType = Sketch::ConstraintPointTypeNone;
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geomline2_originPoint.SplineDefiningPointIndex = 0;$ s2 w* _, o; ~, u
sketch1->CreateCoincidentConstraint(geomline1_startPoint,geomline2_originPoint);
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//4 add constraints (dimension)- x z2 C& O: L5 R4 W0 e% L
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NXObject *nullNXObject(NULL);( v3 V* O5 u$ x" \8 {* [+ ]- A
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stringstream s_height1,s_height2,s_length;" F. ]+ t2 |5 S4 [3 n4 b
s_height1 <<height1;
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s_height2 <<height2;
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s_length <<length;1 a" R1 G# r0 B* j. f4 Q/ h
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Expression *expression1,*expression2,*expression3;6 w7 P' b; o4 R" f
expression1 = workPart->Expressions()->CreateSystemExpression(s_height1.str());7 v. @) x! S$ S
expression2 = workPart->Expressions()->CreateSystemExpression(s_length.str());
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expression3 = workPart->Expressions()->CreateSystemExpression(s_height2.str());
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// line1 dimension 8 ~8 L5 m5 _8 c, I
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Sketch::DimensionGeometry dimLine1_startPoint;9 A; E) Z2 B2 V5 R; `7 A
dimLine1_startPoint.Geometry = line1;$ p9 g2 x8 A! b/ n2 b+ C
dimLine1_startPoint.AssocType = Sketch::AssocTypeStartPoint;/ a. y/ H3 G% r3 |6 C9 K
dimLine1_startPoint.AssocValue = 0;
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dimLine1_startPoint.HelpPoint.X = 0.0;
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dimLine1_startPoint.HelpPoint.Y = 0.0;9 r* u# o- z" W2 a1 E+ L' Y
dimLine1_startPoint.HelpPoint.Z = 0.0;) Z O" L: Q. y& f
dimLine1_startPoint.View = nullNXObject;
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Sketch::DimensionGeometry dimLine1_endPoint;4 q' ?: t c3 L6 B9 ^0 T4 y: X
dimLine1_endPoint.Geometry = line1;* m {1 G- d7 S+ s a
dimLine1_endPoint.AssocType = Sketch::AssocTypeEndPoint;1 F) U. c% ~9 \! R; B e" S
dimLine1_endPoint.AssocValue = 0;+ ^1 _6 t# h% w- | `8 p% o1 Z
dimLine1_endPoint.HelpPoint.X = 0.0;/ t! f2 U$ T/ e6 H
dimLine1_endPoint.HelpPoint.Y = 0.0;: H) {. r0 u+ ]3 c
dimLine1_endPoint.HelpPoint.Z = 0.0;
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dimLine1_endPoint.View = nullNXObject;8 n1 s) N8 b# p: R* Q7 p
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Point3d dimOrigin1(-100, height1/2, 0.0);' r S- z/ v% ~, Y
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sketch1->CreateDimension(Sketch::ConstraintTypeParallelDim, dimLine1_startPoint, dimLine1_endPoint, dimOrigin1, expression1, Sketch::DimensionOptionCreateAsDriving);$ S' g% m4 B' M+ C7 z6 @
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// line2 dimension n/ f) o3 D- K3 Y/ Y) t5 Y
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Sketch::DimensionGeometry dimLine2_startPoint;4 N0 {$ D6 v6 x3 Q7 I
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;7 n7 K0 T& R4 \; ?7 Z
dimLine2_startPoint.HelpPoint.Y = 0.0;* T5 ~8 Z/ Q2 k' |- ^* a' Y+ |
dimLine2_startPoint.HelpPoint.Z = 0.0;$ v3 ?. P3 s* r" E. [" ~; Y, y
dimLine2_startPoint.View = nullNXObject;
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Sketch::DimensionGeometry dimLine2_endPoint;8 d2 v# a' g% L) Q& c
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;5 `5 O1 b6 A1 f' W3 e
dimLine2_endPoint.HelpPoint.Z = 0.0;+ m7 ^* ?2 ]" v8 o* h4 N v
dimLine2_endPoint.View = nullNXObject;
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Point3d dimOrigin2(length /2,100 + height1, 0.0);
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sketch1->CreateDimension(Sketch::ConstraintTypeParallelDim, dimLine2_startPoint, dimLine2_endPoint, dimOrigin2, expression2, Sketch::DimensionOptionCreateAsDriving);
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// line3 dimension 6 d. d1 p+ Z+ i& X7 ^8 Z0 K& `0 ~% {! p
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Sketch::DimensionGeometry dimLine3_startPoint;
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dimLine3_startPoint.Geometry = line3;3 Z0 s" ]& {. }, v a9 u
dimLine3_startPoint.AssocType = Sketch::AssocTypeStartPoint;1 i- @1 p5 l9 F7 ]6 U
dimLine3_startPoint.AssocValue = 0;
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dimLine3_startPoint.HelpPoint.X = 0.0;
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dimLine3_startPoint.HelpPoint.Y = 0.0;
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dimLine3_startPoint.HelpPoint.Z = 0.0;: @+ w7 r; R% x
dimLine3_startPoint.View = nullNXObject;" |3 J+ N) x3 }/ e$ M4 b9 l
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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;( S( V! U4 o# I, V
dimLine3_endPoint.HelpPoint.X = 0.0;
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dimLine3_endPoint.HelpPoint.Y = 0.0;. A9 E( N: K4 v1 p% E
dimLine3_endPoint.HelpPoint.Z = 0.0;7 j% H, f R. t( I0 H% t' ?+ p. R) F
dimLine3_endPoint.View = nullNXObject;
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Point3d dimOrigin3( 100 + length, height1-height2+ height2 /2 , 0.0);
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sketch1->CreateDimension(Sketch::ConstraintTypeParallelDim, dimLine3_startPoint, dimLine3_endPoint, dimOrigin3, expression3, Sketch::DimensionOptionCreateAsDriving);# M" y! k; t: h2 v: x
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//5 update & deactive
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sketch1->Update();& I Y) q, H2 V: C _ ?
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sketch1->Deactivate(Sketch::ViewReorientFalse,Sketch::UpdateLevelModel); U8 f' S+ Q8 [. [- k2 f1 [
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delete expression1;! k7 K( |9 [2 V/ @
delete expression2;& v7 W) x( |* g% d/ i6 f1 g
delete expression3;' e3 F% ?% i1 B: P" h
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}
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