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()2 j$ z9 C1 w4 b6 u, Z! A( m$ i$ C6 e$ c
{
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Sketch *nullSketch(NULL);
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SketchInPlaceBuilder *sketchInPlaceBuilder1;) f" E% h2 M: ?! v; K2 j. a2 R
sketchInPlaceBuilder1 = workPart->Sketches()->CreateNewSketchInPlaceBuilder(nullSketch);
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sketchInPlaceBuilder1->SetPlaneOption(Sketch::PlaneOptionNewPlane);% R" R# h1 O4 ~8 \0 r# F
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//sketchInPlaceBuilder1->Plane()->SetMethod(PlaneTypes::MethodTypeFixedZ);1 M+ P1 k- G1 l7 u/ \# P1 ^8 l& }
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// add preference
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theSession->Preferences()->Sketch()->SetContinuousAutoDimensioning(false);
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Drafting::PreferencesBuilder *preferencesBuilder1;
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preferencesBuilder1 = workPart->SettingsManager()->CreatePreferencesBuilder();
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preferencesBuilder1->AnnotationStyle()->DimensionStyle()->SetAngularDimensionValuePrecision(3);
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preferencesBuilder1->AnnotationStyle()->DimensionStyle()->SetDimensionValuePrecision(3);
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preferencesBuilder1->Commit();; \+ H B$ t, o% _( A" H
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preferencesBuilder1->Destroy();
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NXObject *nXObject1;
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nXObject1 = sketchInPlaceBuilder1->Commit();+ L8 e' _9 H8 D; J5 L$ O" j9 a
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Sketch *sketch1(dynamic_cast<Sketch *>(nXObject1));
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Features::Feature *feature1;
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feature1 = sketch1->Feature();6 Z8 Z7 Q& G; Q5 | a
feature1->SetName("XY-Plane-Sketch");( V6 j" W6 b% o% T+ w
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sketchInPlaceBuilder1->Destroy();
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//1 active sketch " c& p% g- U5 d6 @; P" K
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sketch1->Activate(Sketch::ViewReorientFalse);) ]. g! K5 _& ]$ ]1 ]2 B) N
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double height1 = this->expressionHeight1->GetProperties()->GetDouble("Value");+ s. G' W* Q/ h8 \$ V; H
double height2 = this->expressionHeight2->GetProperties()->GetDouble("Value");6 n% B4 X- b! \# X
double length = this->expressionLength->GetProperties()->GetDouble("Value");+ E) Y8 s' t* E* J9 g+ c
// 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);% i! f$ N- g- z: U! ?( i- K
Point3d endPoint2(length, height1, 0.0);/ x! V+ H2 H+ @ ~( {' f& W) I
Point3d endPoint3(length, height1-height2, 0.0);$ [' t/ a! t9 H, N* {
Point3d origin = sketch1->Origin();
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Point *originPoint = workPart->Points()->CreatePoint(origin);9 u4 b" A' k7 g* w& r* Z& v
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Line *line1,*line2,*line3,*line4;
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line1 = workPart->Curves()->CreateLine(startPoint1, endPoint1);
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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);6 L% l* I _' c9 l) y
// 2.2 add geometry
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sketch1->AddGeometry(line1,Sketch::InferConstraintsOptionInferCoincidentConstraints);7 g+ }, h& G9 {! l* W* i! Y
sketch1->AddGeometry(line2,Sketch::InferConstraintsOptionInferCoincidentConstraints);0 p6 B+ K. I6 H
sketch1->AddGeometry(line3,Sketch::InferConstraintsOptionInferCoincidentConstraints);
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sketch1->AddGeometry(line4,Sketch::InferConstraintsOptionInferCoincidentConstraints);
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//3 add constraints ( gemo). i5 u! c0 O5 Y6 w, s
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Sketch::ConstraintGeometry geomline1;7 C4 l& h; k5 b8 O g- p/ r1 G
geomline1.Geometry = line1;& ^* J C z$ N. m/ q+ `
geomline1.PointType = Sketch::ConstraintPointTypeNone;
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geomline1.SplineDefiningPointIndex = 0;
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sketch1->CreateVerticalConstraint(geomline1);7 L! _6 p! r0 N) L& k
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Sketch::ConstraintGeometry geomline2;" ~3 x6 F2 Z, |
geomline2.Geometry = line2;
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geomline2.PointType = Sketch::ConstraintPointTypeNone;% V: c$ c' ~- W) U" C- F
geomline2.SplineDefiningPointIndex = 0;
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sketch1->CreateHorizontalConstraint(geomline2);
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Sketch::ConstraintGeometry geomline3;4 f9 q+ _1 s3 {. ]
geomline3.Geometry = line3;( s( @# D0 O C: X. w
geomline3.PointType = Sketch::ConstraintPointTypeNone;
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geomline3.SplineDefiningPointIndex = 0;/ V- y( _3 E5 r' b9 ]& L$ z
sketch1->CreateVerticalConstraint(geomline3);6 d; J3 Z7 r! S6 Y# ?
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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;2 q, e: J( @ ]* A. k8 P5 I
geomline1.SplineDefiningPointIndex = 0;
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Sketch::ConstraintGeometry geomline2_originPoint;
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geomline2_originPoint.Geometry = originPoint;, U) ~5 C7 f: I) @& }+ q* c$ D
geomline2_originPoint.PointType = Sketch::ConstraintPointTypeNone;
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geomline2_originPoint.SplineDefiningPointIndex = 0;) g. k; R1 V5 W( z- j+ P
sketch1->CreateCoincidentConstraint(geomline1_startPoint,geomline2_originPoint);
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//4 add constraints (dimension) I' n5 U% {' v/ J: R
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NXObject *nullNXObject(NULL);& Z: R4 t$ z' k# O- }# k
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stringstream s_height1,s_height2,s_length;/ o5 F' e0 x) j2 d+ _- m
s_height1 <<height1;' I8 |9 m- J- N0 `' q
s_height2 <<height2;
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s_length <<length;+ i) I- @1 F! {7 c \* [7 g8 r
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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());/ a7 |( V( U$ Y7 C3 T4 y6 @
expression3 = workPart->Expressions()->CreateSystemExpression(s_height2.str());$ h6 e2 v; `0 ?" S5 q
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// line1 dimension + k1 z6 y4 x- c2 ~$ N/ L6 R) z4 o
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Sketch::DimensionGeometry dimLine1_startPoint;* P: \8 l" ]$ u% N" o. y
dimLine1_startPoint.Geometry = line1;. z) K, c3 R1 l3 F B# T
dimLine1_startPoint.AssocType = Sketch::AssocTypeStartPoint;2 a+ x* O9 Q3 P. P
dimLine1_startPoint.AssocValue = 0;
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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;; g3 D0 i: L f3 w
dimLine1_startPoint.View = nullNXObject;6 ] C" B; v( H% W6 a6 {& m4 x
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Sketch::DimensionGeometry dimLine1_endPoint;) I. M% x. `9 y& N) ~# j1 |
dimLine1_endPoint.Geometry = line1;0 @& q% e1 \* \; Z7 L* U
dimLine1_endPoint.AssocType = Sketch::AssocTypeEndPoint;
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dimLine1_endPoint.AssocValue = 0;( `% y* O$ u" N% t% _
dimLine1_endPoint.HelpPoint.X = 0.0;% A. R$ S* [. o# o
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);5 A) _6 i( D8 O6 [/ F/ Q
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sketch1->CreateDimension(Sketch::ConstraintTypeParallelDim, dimLine1_startPoint, dimLine1_endPoint, dimOrigin1, expression1, Sketch::DimensionOptionCreateAsDriving);2 Z6 V, y U" a4 ~2 o% T& w, z( v: ^
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// line2 dimension
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Sketch::DimensionGeometry dimLine2_startPoint;! ~' q9 T- Q% c( U- F; G0 ^
dimLine2_startPoint.Geometry = line2;6 V" B4 ]0 n% H2 ]
dimLine2_startPoint.AssocType = Sketch::AssocTypeStartPoint;
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dimLine2_startPoint.AssocValue = 0;# b2 @+ g5 l, }
dimLine2_startPoint.HelpPoint.X = 0.0;
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dimLine2_startPoint.HelpPoint.Y = 0.0;3 ~8 {; }* e% ~2 h) X- x
dimLine2_startPoint.HelpPoint.Z = 0.0;
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dimLine2_startPoint.View = nullNXObject;
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Sketch::DimensionGeometry dimLine2_endPoint;2 y+ v% z% A6 _3 G$ R9 [4 U; \
dimLine2_endPoint.Geometry = line2;6 V4 [" C$ ` d6 F a+ ~1 s
dimLine2_endPoint.AssocType = Sketch::AssocTypeEndPoint;( {+ u: O8 z9 F
dimLine2_endPoint.AssocValue = 0;
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dimLine2_endPoint.HelpPoint.X = 0.0;
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dimLine2_endPoint.HelpPoint.Y = 0.0;. g% j% g6 H' K% j
dimLine2_endPoint.HelpPoint.Z = 0.0;4 B3 N: k5 {1 t$ ~1 @ S5 K; }
dimLine2_endPoint.View = nullNXObject;! J- z0 }+ Y6 i
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Point3d dimOrigin2(length /2,100 + height1, 0.0);6 c$ c. u2 ?9 [3 w& E) C
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sketch1->CreateDimension(Sketch::ConstraintTypeParallelDim, dimLine2_startPoint, dimLine2_endPoint, dimOrigin2, expression2, Sketch::DimensionOptionCreateAsDriving); k# K9 g& \6 r/ \; K
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// line3 dimension
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Sketch::DimensionGeometry dimLine3_startPoint; Q. G0 r0 e' w3 O
dimLine3_startPoint.Geometry = line3;; b# A( h- t2 o% E5 Y( c3 n6 w
dimLine3_startPoint.AssocType = Sketch::AssocTypeStartPoint;
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dimLine3_startPoint.AssocValue = 0;- V1 G9 k) J2 r2 D( h' D
dimLine3_startPoint.HelpPoint.X = 0.0;
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dimLine3_startPoint.HelpPoint.Y = 0.0;9 c9 e4 O- |3 c; |; d, s5 X& X
dimLine3_startPoint.HelpPoint.Z = 0.0;& x1 D3 Q @: Z5 e
dimLine3_startPoint.View = nullNXObject;# E+ R6 C# U, E1 }) _$ U
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Sketch::DimensionGeometry dimLine3_endPoint;
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dimLine3_endPoint.Geometry = line3;. A; k1 U8 L7 W' }4 z0 C
dimLine3_endPoint.AssocType = Sketch::AssocTypeEndPoint;4 ^ F# j5 T$ I- t0 Z
dimLine3_endPoint.AssocValue = 0;
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dimLine3_endPoint.HelpPoint.X = 0.0;* y0 ~/ V# Z* O
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);9 }. |" x2 t# f7 D
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//5 update & deactive
sketch1->Update();
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sketch1->Deactivate(Sketch::ViewReorientFalse,Sketch::UpdateLevelModel);7 P/ p* u, x* u8 [4 t
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delete expression1;
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delete expression2;+ A5 a. J# F$ O& f4 ?
delete expression3;
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