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()
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Sketch *nullSketch(NULL);: x# [5 e. P2 D, i$ l' [
SketchInPlaceBuilder *sketchInPlaceBuilder1;2 V- j) T$ m* K" Z! r
sketchInPlaceBuilder1 = workPart->Sketches()->CreateNewSketchInPlaceBuilder(nullSketch);
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sketchInPlaceBuilder1->SetPlaneOption(Sketch::PlaneOptionNewPlane);% G3 I' k* a% p5 U6 |$ d) o2 \ S
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//sketchInPlaceBuilder1->Plane()->SetMethod(PlaneTypes::MethodTypeFixedZ);
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// add preference
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theSession->Preferences()->Sketch()->SetContinuousAutoDimensioning(false);+ A: A& P" [) b6 A* P
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Drafting::PreferencesBuilder *preferencesBuilder1;
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preferencesBuilder1 = workPart->SettingsManager()->CreatePreferencesBuilder();
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preferencesBuilder1->AnnotationStyle()->DimensionStyle()->SetAngularDimensionValuePrecision(3);* ]4 G' V( V- i# N
preferencesBuilder1->AnnotationStyle()->DimensionStyle()->SetDimensionValuePrecision(3);
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preferencesBuilder1->Commit();
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preferencesBuilder1->Destroy();' z5 T9 t- Z! ^, t9 S. r
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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;2 Z, m& U- y1 R
feature1 = sketch1->Feature();
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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); c6 k0 x: w7 I8 o( ]
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double height1 = this->expressionHeight1->GetProperties()->GetDouble("Value");+ X' N/ B, }+ [ o# M8 O
double height2 = this->expressionHeight2->GetProperties()->GetDouble("Value");' B9 l* K( N8 y
double length = this->expressionLength->GetProperties()->GetDouble("Value");
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// 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);. f+ I5 c v8 K3 }) F+ @# w
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);* v6 U! i* d" N3 d
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Line *line1,*line2,*line3,*line4;' e5 }5 @% Y) E6 f4 o' n7 X# M8 K
line1 = workPart->Curves()->CreateLine(startPoint1, endPoint1);3 o' S% p c. c4 Z4 X: L) c( ]# D/ ~, M" a
line2 = workPart->Curves()->CreateLine(endPoint1, endPoint2);/ x1 G4 w ]5 U% j1 t! N, I
line3 = workPart->Curves()->CreateLine(endPoint2, endPoint3);
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line4 = workPart->Curves()->CreateLine(endPoint3, startPoint1); E: g" a9 [, a: J! n& ?1 l. b9 ^
// 2.2 add geometry$ s5 m2 P: ]9 i! L$ I. u8 a4 I
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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);% a# P9 d$ _$ f; q, j
sketch1->AddGeometry(line4,Sketch::InferConstraintsOptionInferCoincidentConstraints);, c" m: `9 z2 i! B8 R4 `- L1 K
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//3 add constraints ( gemo)# u; w6 h+ }9 {0 T% {& b2 {$ I
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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);# C. E+ U B# F% C) k: B
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Sketch::ConstraintGeometry geomline2;, O& q7 x+ d6 S% [- Z
geomline2.Geometry = line2;6 t: ?& u# ?0 ~
geomline2.PointType = Sketch::ConstraintPointTypeNone;
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geomline2.SplineDefiningPointIndex = 0;
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sketch1->CreateHorizontalConstraint(geomline2);& s) H' S% G$ J' \: |! M2 m
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Sketch::ConstraintGeometry geomline3;& X; a- D/ n. o2 d( M/ \4 ]
geomline3.Geometry = line3;
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geomline3.PointType = Sketch::ConstraintPointTypeNone;1 R" z" D+ R; ~1 w
geomline3.SplineDefiningPointIndex = 0;
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sketch1->CreateVerticalConstraint(geomline3);
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Sketch::ConstraintGeometry geomline1_startPoint;1 i" i- j3 _; _# F* [
geomline1_startPoint.Geometry = line1;# {& P1 w; g$ y, |
geomline1_startPoint.PointType = Sketch::ConstraintPointTypeStartVertex;0 z- O5 K* S( [6 j
geomline1.SplineDefiningPointIndex = 0;3 h8 L ^; P ` K
Sketch::ConstraintGeometry geomline2_originPoint;
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geomline2_originPoint.Geometry = originPoint;( N, m# h; r5 ~; b
geomline2_originPoint.PointType = Sketch::ConstraintPointTypeNone;) D3 r6 C4 [$ b0 f% l F
geomline2_originPoint.SplineDefiningPointIndex = 0;) a. Q/ Z- a+ K0 ^- L4 x
sketch1->CreateCoincidentConstraint(geomline1_startPoint,geomline2_originPoint);
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//4 add constraints (dimension)
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NXObject *nullNXObject(NULL);
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stringstream s_height1,s_height2,s_length;& y( D7 X+ c9 Q1 D
s_height1 <<height1;3 P+ l+ S- G( L* N. w
s_height2 <<height2;
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s_length <<length;
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Expression *expression1,*expression2,*expression3;) [2 ?# p6 \( m7 c' Y! g
expression1 = workPart->Expressions()->CreateSystemExpression(s_height1.str());, J) m1 ?0 i& }
expression2 = workPart->Expressions()->CreateSystemExpression(s_length.str());
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expression3 = workPart->Expressions()->CreateSystemExpression(s_height2.str());
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// line1 dimension " i* R, o' E6 J
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Sketch::DimensionGeometry dimLine1_startPoint;% T. ]6 h; S7 k+ k, i! u
dimLine1_startPoint.Geometry = line1;
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dimLine1_startPoint.AssocType = Sketch::AssocTypeStartPoint;
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dimLine1_startPoint.AssocValue = 0;5 \' I: t4 ?& _/ O4 k
dimLine1_startPoint.HelpPoint.X = 0.0;- Q( b8 U+ b$ x( Z' K
dimLine1_startPoint.HelpPoint.Y = 0.0;
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dimLine1_startPoint.HelpPoint.Z = 0.0;
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dimLine1_startPoint.View = nullNXObject;
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Sketch::DimensionGeometry dimLine1_endPoint;
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dimLine1_endPoint.Geometry = line1;9 c) l, y( Q. U0 B+ h$ ?2 B0 \/ j
dimLine1_endPoint.AssocType = Sketch::AssocTypeEndPoint;
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dimLine1_endPoint.AssocValue = 0;
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dimLine1_endPoint.HelpPoint.X = 0.0;
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dimLine1_endPoint.HelpPoint.Y = 0.0;
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dimLine1_endPoint.HelpPoint.Z = 0.0;3 C% T; T6 _0 R6 q" u
dimLine1_endPoint.View = nullNXObject;
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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
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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;$ z% _' t/ o6 x/ h
dimLine2_startPoint.HelpPoint.X = 0.0;' G; q8 e- X1 W1 q
dimLine2_startPoint.HelpPoint.Y = 0.0;
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dimLine2_startPoint.HelpPoint.Z = 0.0;
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dimLine2_startPoint.View = nullNXObject;
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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;9 C; ]+ a8 C3 F% v7 e& G$ y# C
dimLine2_endPoint.AssocValue = 0;
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dimLine2_endPoint.HelpPoint.X = 0.0;# y# y, q* t/ H. j* W m' i
dimLine2_endPoint.HelpPoint.Y = 0.0;* y6 I* q# L0 z, ^4 E5 A
dimLine2_endPoint.HelpPoint.Z = 0.0;' N( Y4 A) M5 k! f. ~& C1 |+ g% ^5 [7 D
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);: y6 u* n, X% c$ { ^
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// line3 dimension + k; X7 x, V2 w6 e5 F/ ^# e( ~' w
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Sketch::DimensionGeometry dimLine3_startPoint;* H: u. ?( ~" d; ?1 x* n) o, _
dimLine3_startPoint.Geometry = line3;0 p+ ^! f0 f+ U& I9 e* E' @" w
dimLine3_startPoint.AssocType = Sketch::AssocTypeStartPoint;0 P$ A" @! E2 V' Y$ t
dimLine3_startPoint.AssocValue = 0;% s8 k9 ^8 ^/ m7 }) B) d
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;
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dimLine3_startPoint.View = nullNXObject;$ m+ r2 Q- @0 C; Z' ?
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Sketch::DimensionGeometry dimLine3_endPoint;0 e f7 V# G. U4 ~/ }$ s
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;+ L ] e. ^9 U" k4 H3 r
dimLine3_endPoint.HelpPoint.Y = 0.0; e6 F3 Y, N3 Y5 n# I; x
dimLine3_endPoint.HelpPoint.Z = 0.0;6 Y, A z: ]7 l; n
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);
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//5 update & deactive7 S/ Y8 ~; v4 P3 q- I2 r) g7 f. }( [
sketch1->Update();
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sketch1->Deactivate(Sketch::ViewReorientFalse,Sketch::UpdateLevelModel);6 @7 y: f& g! ?/ [# E' W
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delete expression1;
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delete expression2;7 u2 Q2 p9 e+ c
delete expression3;
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}
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