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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{
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Sketch *nullSketch(NULL);+ c; N( W$ s# ?7 d+ ~: N w
SketchInPlaceBuilder *sketchInPlaceBuilder1;5 a1 ]' H0 r' i& s
sketchInPlaceBuilder1 = workPart->Sketches()->CreateNewSketchInPlaceBuilder(nullSketch);5 J: W# }) A& l0 n+ o: U7 a" r
sketchInPlaceBuilder1->SetPlaneOption(Sketch::PlaneOptionNewPlane);
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//sketchInPlaceBuilder1->Plane()->SetMethod(PlaneTypes::MethodTypeFixedZ);/ e3 {9 k* J" Q& H' Y1 x5 ~, }
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// add preference
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theSession->Preferences()->Sketch()->SetContinuousAutoDimensioning(false);6 ?( q6 H# Q: t! @5 b) c/ ^9 D
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Drafting::PreferencesBuilder *preferencesBuilder1;5 e; M. K, V0 J) l
preferencesBuilder1 = workPart->SettingsManager()->CreatePreferencesBuilder();
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preferencesBuilder1->AnnotationStyle()->DimensionStyle()->SetAngularDimensionValuePrecision(3);- O. Z4 t) S5 R- i9 m4 W
preferencesBuilder1->AnnotationStyle()->DimensionStyle()->SetDimensionValuePrecision(3);
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preferencesBuilder1->Commit();' d, o3 C% }4 Y' q8 U) \
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preferencesBuilder1->Destroy();
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NXObject *nXObject1;2 r1 G: L6 z% i0 b; A8 e% P: P
nXObject1 = sketchInPlaceBuilder1->Commit();8 s% z( B8 X( n6 g5 G* U
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Sketch *sketch1(dynamic_cast<Sketch *>(nXObject1));8 F3 j( q- f, f/ g9 l6 n
Features::Feature *feature1;
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feature1 = sketch1->Feature();- K6 r( [8 H9 e5 A' N/ b9 d6 u* l
feature1->SetName("XY-Plane-Sketch");( T2 r% Y3 y+ M' a0 ^2 @9 ~) B
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sketchInPlaceBuilder1->Destroy();' e* t6 U- z% `/ ~8 @
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//1 active sketch 9 T+ {" {/ C- 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");3 m% M# c. L$ ^6 l9 ]
double length = this->expressionLength->GetProperties()->GetDouble("Value");
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// 2.1 create geometry$ x7 b' c) J8 \: ~! N
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Point3d startPoint1(0.0, 0.0, 0.0);/ c6 X- B/ O2 b8 Y1 A: R
Point3d endPoint1(0, height1, 0.0);: @- b# M$ J# J5 b" ]
Point3d endPoint2(length, height1, 0.0);
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Point3d endPoint3(length, height1-height2, 0.0);' _* ]: c9 S- s5 e
Point3d origin = sketch1->Origin();' O4 i* y. {5 m* y
Point *originPoint = workPart->Points()->CreatePoint(origin);4 h" }8 o! G+ B& ^: H
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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);- l% k! H# K' R6 u8 \! a8 A* k; ^! w
line4 = workPart->Curves()->CreateLine(endPoint3, startPoint1);
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// 2.2 add geometry
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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);$ d6 D; i) a+ i/ A9 L- s
sketch1->AddGeometry(line4,Sketch::InferConstraintsOptionInferCoincidentConstraints);
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//3 add constraints ( gemo)7 a. ?5 ^2 U' f# I: }+ u0 k
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Sketch::ConstraintGeometry geomline1;, Q; O8 F+ u: ^7 _
geomline1.Geometry = line1;
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geomline1.PointType = Sketch::ConstraintPointTypeNone;) X9 |9 g+ j2 U# M$ L. s
geomline1.SplineDefiningPointIndex = 0;
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sketch1->CreateVerticalConstraint(geomline1);6 ~! S0 S/ U. n4 k+ ]
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Sketch::ConstraintGeometry geomline2;1 Z# u0 m( b, _/ |! @# s
geomline2.Geometry = line2;
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geomline2.PointType = Sketch::ConstraintPointTypeNone;
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geomline2.SplineDefiningPointIndex = 0;; B' S# r6 ]: A w q" H
sketch1->CreateHorizontalConstraint(geomline2);0 r+ `' E# K) M7 c
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Sketch::ConstraintGeometry geomline3;$ g/ I4 u* R2 f u
geomline3.Geometry = line3; B) A) Z6 j P+ p
geomline3.PointType = Sketch::ConstraintPointTypeNone;
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geomline3.SplineDefiningPointIndex = 0;
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sketch1->CreateVerticalConstraint(geomline3);
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Sketch::ConstraintGeometry geomline1_startPoint;/ v+ S% j3 ~# M7 M* o; Z: J8 c, O
geomline1_startPoint.Geometry = line1;3 W8 d4 w6 y- n4 [" L
geomline1_startPoint.PointType = Sketch::ConstraintPointTypeStartVertex;; d8 v) X- d: d9 r# g
geomline1.SplineDefiningPointIndex = 0;' L, }$ n9 \: p
Sketch::ConstraintGeometry geomline2_originPoint;9 h7 R- l! c" J
geomline2_originPoint.Geometry = originPoint;
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geomline2_originPoint.PointType = Sketch::ConstraintPointTypeNone;
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geomline2_originPoint.SplineDefiningPointIndex = 0;: `# h% H8 }# [1 j3 G6 e$ m
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;
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s_height1 <<height1;) {0 M |+ h& Q9 M$ X3 `1 Y3 ^ a: p
s_height2 <<height2;
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s_length <<length;" \! m$ n: R% h* q
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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());, R& x; ?9 {7 N$ g& T- F$ s1 v
expression3 = workPart->Expressions()->CreateSystemExpression(s_height2.str());. `3 w* F6 w: G1 q; [ `, Z7 T" n
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// line1 dimension 8 V5 F! U( P% N3 D- N% G7 l
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Sketch::DimensionGeometry dimLine1_startPoint;
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dimLine1_startPoint.Geometry = line1;) M, m0 p" W( ~( l
dimLine1_startPoint.AssocType = Sketch::AssocTypeStartPoint;6 v9 i9 H) F$ J* @) u8 j' i; R
dimLine1_startPoint.AssocValue = 0;- L! W6 S% x1 d
dimLine1_startPoint.HelpPoint.X = 0.0;
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dimLine1_startPoint.HelpPoint.Y = 0.0;& ^ @+ t7 H; h! v
dimLine1_startPoint.HelpPoint.Z = 0.0;
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dimLine1_startPoint.View = nullNXObject;8 s; L% T. {0 L* Z) t
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Sketch::DimensionGeometry dimLine1_endPoint;
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dimLine1_endPoint.Geometry = line1;
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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;. Y% s+ k3 [3 w7 J8 Z* a
dimLine1_endPoint.HelpPoint.Z = 0.0; k4 J- a# ^; e2 S- F- r" I5 q
dimLine1_endPoint.View = nullNXObject;) G: N! [/ X) J
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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);+ ^+ S3 [( j5 F$ `. C9 o
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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;$ a8 f) G( k8 P5 b; r& G
dimLine2_startPoint.AssocValue = 0;
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dimLine2_startPoint.HelpPoint.X = 0.0;1 d6 D8 l4 h+ }2 Q: y: T+ F1 P
dimLine2_startPoint.HelpPoint.Y = 0.0;- o, |: y. T2 \8 o0 O
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;7 l1 y! [- v6 H: x
dimLine2_endPoint.AssocType = Sketch::AssocTypeEndPoint;
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dimLine2_endPoint.AssocValue = 0;
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dimLine2_endPoint.HelpPoint.X = 0.0;; L. r4 S$ {" ~5 d* @
dimLine2_endPoint.HelpPoint.Y = 0.0;
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dimLine2_endPoint.HelpPoint.Z = 0.0;
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dimLine2_endPoint.View = nullNXObject;7 W1 w0 \+ T% U; z1 W# N8 B/ [
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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);, t1 X* m0 R! t/ c
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// line3 dimension
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Sketch::DimensionGeometry dimLine3_startPoint;
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dimLine3_startPoint.Geometry = line3;3 `! Y q" s% b" q5 p) M( I
dimLine3_startPoint.AssocType = Sketch::AssocTypeStartPoint;) M- O, }! f9 j4 z) N) d7 z
dimLine3_startPoint.AssocValue = 0;
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dimLine3_startPoint.HelpPoint.X = 0.0;
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dimLine3_startPoint.HelpPoint.Y = 0.0;9 Q, ]/ x9 |' I; {
dimLine3_startPoint.HelpPoint.Z = 0.0;1 Q2 T5 W# S( E9 |% a
dimLine3_startPoint.View = nullNXObject;
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Sketch::DimensionGeometry dimLine3_endPoint;
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dimLine3_endPoint.Geometry = line3;9 @% _4 Z4 ]# Q' ` N4 s/ ^
dimLine3_endPoint.AssocType = Sketch::AssocTypeEndPoint;
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dimLine3_endPoint.AssocValue = 0;$ ?$ g( m* E4 m4 c5 ]6 U
dimLine3_endPoint.HelpPoint.X = 0.0;
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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);/ u7 ^8 S. B8 W) P
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sketch1->CreateDimension(Sketch::ConstraintTypeParallelDim, dimLine3_startPoint, dimLine3_endPoint, dimOrigin3, expression3, Sketch::DimensionOptionCreateAsDriving);( q$ C8 z/ z- y8 q/ H
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//5 update & deactive
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sketch1->Update();
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sketch1->Deactivate(Sketch::ViewReorientFalse,Sketch::UpdateLevelModel);) ^8 H. r. H2 O O4 z+ o0 m% g
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delete expression1;
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delete expression2;
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delete expression3;
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}
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