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" l' L# a; o0 I

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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);8 i/ o) [( F0 g, x
SketchInPlaceBuilder *sketchInPlaceBuilder1;
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sketchInPlaceBuilder1 = workPart->Sketches()->CreateNewSketchInPlaceBuilder(nullSketch);2 J1 ?/ K! A2 |9 S: G! q! B) s
sketchInPlaceBuilder1->SetPlaneOption(Sketch::PlaneOptionNewPlane);
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//sketchInPlaceBuilder1->Plane()->SetMethod(PlaneTypes::MethodTypeFixedZ); ?/ R' p$ p; H" P8 A. B! m
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// add preference0 c8 i4 @4 E8 f/ {
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theSession->Preferences()->Sketch()->SetContinuousAutoDimensioning(false);
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Drafting::PreferencesBuilder *preferencesBuilder1;1 M- h- P# k& H& k2 U! d
preferencesBuilder1 = workPart->SettingsManager()->CreatePreferencesBuilder();$ g3 [& I2 m) E; F) ?2 O
preferencesBuilder1->AnnotationStyle()->DimensionStyle()->SetAngularDimensionValuePrecision(3);4 y+ ^! O5 p* X& |( j0 @$ k+ \
preferencesBuilder1->AnnotationStyle()->DimensionStyle()->SetDimensionValuePrecision(3);
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preferencesBuilder1->Commit();0 j: ^' O9 V2 K7 f4 V9 Y, r
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preferencesBuilder1->Destroy();" H. n9 s- N" p, f, T7 [+ Q
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NXObject *nXObject1;* P% C5 X, K6 k5 K5 I# w5 S% m
nXObject1 = sketchInPlaceBuilder1->Commit();# T/ x( h8 ]3 R: l: q" s) _
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Sketch *sketch1(dynamic_cast<Sketch *>(nXObject1));
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Features::Feature *feature1;& D% C" m4 {/ d, s" v. `# i
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 ; ~- w* Z7 X9 v8 e7 V- @5 D L
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sketch1->Activate(Sketch::ViewReorientFalse);
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double height1 = this->expressionHeight1->GetProperties()->GetDouble("Value");
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double height2 = this->expressionHeight2->GetProperties()->GetDouble("Value");) \ k9 ^& B3 d( l* r' o
double length = this->expressionLength->GetProperties()->GetDouble("Value");3 {( `& `' e6 q3 ]# x8 ^6 w/ ^" y# [8 y
// 2.1 create geometry) [3 `1 Z% z! q' M
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Point3d startPoint1(0.0, 0.0, 0.0);. ^9 k; `6 I, X1 H( L# v6 e* b4 h: `) |
Point3d endPoint1(0, height1, 0.0);. T2 N$ t1 M" G
Point3d endPoint2(length, height1, 0.0);* X8 `1 M- q1 v$ J. c: {
Point3d endPoint3(length, height1-height2, 0.0);
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Point3d origin = sketch1->Origin();8 t& V: ~& o1 c3 r+ m- q5 b6 r
Point *originPoint = workPart->Points()->CreatePoint(origin);# b; m! f. f2 X% g/ `
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Line *line1,*line2,*line3,*line4;: m6 N, h: S0 Y
line1 = workPart->Curves()->CreateLine(startPoint1, endPoint1);3 t3 A: S0 |" k" ?# y0 V
line2 = workPart->Curves()->CreateLine(endPoint1, endPoint2);% G) D m/ P5 B- _9 _9 p
line3 = workPart->Curves()->CreateLine(endPoint2, endPoint3);
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line4 = workPart->Curves()->CreateLine(endPoint3, startPoint1);
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// 2.2 add geometry- B6 q$ D1 J2 v
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sketch1->AddGeometry(line1,Sketch::InferConstraintsOptionInferCoincidentConstraints);, d+ U3 ~' T( k
sketch1->AddGeometry(line2,Sketch::InferConstraintsOptionInferCoincidentConstraints);! u5 y0 @; X% x& }/ d
sketch1->AddGeometry(line3,Sketch::InferConstraintsOptionInferCoincidentConstraints);
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sketch1->AddGeometry(line4,Sketch::InferConstraintsOptionInferCoincidentConstraints);
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//3 add constraints ( gemo)7 A8 e+ \1 x8 u3 M- R. [; h3 T( m
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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);
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Sketch::ConstraintGeometry geomline2;
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geomline2.Geometry = line2;
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geomline2.PointType = Sketch::ConstraintPointTypeNone;! ~* K* m a4 N( a7 O1 U2 Z
geomline2.SplineDefiningPointIndex = 0;2 v1 Z- `& x8 m$ ^4 G
sketch1->CreateHorizontalConstraint(geomline2);
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Sketch::ConstraintGeometry geomline3;
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geomline3.Geometry = line3;" f1 g! `; }# G" S8 L6 \0 M: ]' N
geomline3.PointType = Sketch::ConstraintPointTypeNone;* N# n, {% U, L+ ], A- c( h
geomline3.SplineDefiningPointIndex = 0;, F, k1 b7 m+ ^
sketch1->CreateVerticalConstraint(geomline3);
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Sketch::ConstraintGeometry geomline1_startPoint;
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geomline1_startPoint.Geometry = line1;; Z8 T) S# B P% m- b" P) ~2 \6 e
geomline1_startPoint.PointType = Sketch::ConstraintPointTypeStartVertex;+ b2 L" t; y6 A, _# ^
geomline1.SplineDefiningPointIndex = 0;
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Sketch::ConstraintGeometry geomline2_originPoint;* R! e; U' _+ t' S' }5 ^1 S) f
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);
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//4 add constraints (dimension)% M8 e- i, J4 P4 }) p
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NXObject *nullNXObject(NULL);" T" r6 X: M( B& P" n0 O& |+ m- `
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stringstream s_height1,s_height2,s_length;
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s_height1 <<height1;' N. X( @' x* H: S! C
s_height2 <<height2;% M, e" n# K6 w" L
s_length <<length;8 A9 s2 A3 S2 V0 H
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Expression *expression1,*expression2,*expression3;
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expression1 = workPart->Expressions()->CreateSystemExpression(s_height1.str());
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expression2 = workPart->Expressions()->CreateSystemExpression(s_length.str());3 T, w! D2 V! Z) j1 m6 H
expression3 = workPart->Expressions()->CreateSystemExpression(s_height2.str());
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// line1 dimension ) C. y9 E& }) d1 l5 b" [
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Sketch::DimensionGeometry dimLine1_startPoint;
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dimLine1_startPoint.Geometry = line1;$ L% L B& t# q; C( ^
dimLine1_startPoint.AssocType = Sketch::AssocTypeStartPoint;
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dimLine1_startPoint.AssocValue = 0;4 D% t u8 A5 `" I. `6 ]' r2 y
dimLine1_startPoint.HelpPoint.X = 0.0;
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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;: |. J+ Q5 y0 g3 g8 Q
dimLine1_endPoint.AssocType = Sketch::AssocTypeEndPoint;. r! J7 l% v) G( I; W
dimLine1_endPoint.AssocValue = 0;0 F$ a6 e/ O# ]0 z: c3 z
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;7 I w5 R% H! l0 r: i
dimLine1_endPoint.View = nullNXObject;7 m9 g1 g$ W) O
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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);* v1 m [7 z: R; ~
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// line2 dimension
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Sketch::DimensionGeometry dimLine2_startPoint;
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dimLine2_startPoint.Geometry = line2;, ~- R& z6 G7 h; t6 E
dimLine2_startPoint.AssocType = Sketch::AssocTypeStartPoint;& S! x3 E' R' s+ C: ]
dimLine2_startPoint.AssocValue = 0;
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dimLine2_startPoint.HelpPoint.X = 0.0;
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dimLine2_startPoint.HelpPoint.Y = 0.0;9 Z' ]: o, u& ` U. Y2 ^
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;3 O: C# \( v9 K# z0 d- e
dimLine2_endPoint.AssocValue = 0;
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dimLine2_endPoint.HelpPoint.X = 0.0;4 Z8 ]- ~# q* W) a# Q2 c- c3 r
dimLine2_endPoint.HelpPoint.Y = 0.0;
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dimLine2_endPoint.HelpPoint.Z = 0.0;8 I. N5 _& y4 s) ]5 C
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);. L" i9 H) a. o+ o7 Z
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// line3 dimension : A8 p' c1 j3 L2 V3 d8 n
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Sketch::DimensionGeometry dimLine3_startPoint;
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dimLine3_startPoint.Geometry = line3;; ~, U* Q. a7 F: t {" I7 T& A' \
dimLine3_startPoint.AssocType = Sketch::AssocTypeStartPoint;) b. D8 C4 \! v0 c- Q; q
dimLine3_startPoint.AssocValue = 0;
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dimLine3_startPoint.HelpPoint.X = 0.0;
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dimLine3_startPoint.HelpPoint.Y = 0.0;4 J9 Z2 |# S$ N7 e
dimLine3_startPoint.HelpPoint.Z = 0.0;, O9 B" q; ^( m8 L) g
dimLine3_startPoint.View = nullNXObject;/ f. w7 A! u% l5 F
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Sketch::DimensionGeometry dimLine3_endPoint;" M+ `! P! \0 K4 P6 ]$ y1 a
dimLine3_endPoint.Geometry = line3;+ i0 x, L+ F- j3 `6 N/ N5 O6 x
dimLine3_endPoint.AssocType = Sketch::AssocTypeEndPoint;
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dimLine3_endPoint.AssocValue = 0;
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dimLine3_endPoint.HelpPoint.X = 0.0;5 k( k* S; A: h8 f0 }
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);
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sketch1->CreateDimension(Sketch::ConstraintTypeParallelDim, dimLine3_startPoint, dimLine3_endPoint, dimOrigin3, expression3, Sketch::DimensionOptionCreateAsDriving);
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//5 update & deactive ^# _5 i V5 s& I4 t2 p) O
sketch1->Update();
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sketch1->Deactivate(Sketch::ViewReorientFalse,Sketch::UpdateLevelModel);' M% \) l, e: K5 m+ y% B9 i
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delete expression1;" J( U+ J! @# j7 s% T- N$ j4 q, j
delete expression2;6 ?& N. X% E0 z) p! s+ l$ ?: Y
delete expression3;
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}
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