PLM之家-NX9.0 二次开发实例视频31 NXOpen C++创建草图基本特征
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。
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
关键代码分享：
void lesson31_createSketch::createIPSketch()
{
Sketch *nullSketch(NULL);
SketchInPlaceBuilder *sketchInPlaceBuilder1;
sketchInPlaceBuilder1 = workPart->Sketches()->CreateNewSketchInPlaceBuilder(nullSketch);
sketchInPlaceBuilder1->SetPlaneOption(Sketch::PlaneOptionNewPlane);
//sketchInPlaceBuilder1->Plane()->SetMethod(PlaneTypes::MethodTypeFixedZ);
// add preference
theSession->Preferences()->Sketch()->SetContinuousAutoDimensioning(false);
Drafting::PreferencesBuilder *preferencesBuilder1;
preferencesBuilder1 = workPart->SettingsManager()->CreatePreferencesBuilder();
preferencesBuilder1->AnnotationStyle()->DimensionStyle()->SetAngularDimensionValuePrecision(3);
preferencesBuilder1->AnnotationStyle()->DimensionStyle()->SetDimensionValuePrecision(3);
preferencesBuilder1->Commit();
preferencesBuilder1->Destroy();
NXObject *nXObject1;
nXObject1 = sketchInPlaceBuilder1->Commit();
Sketch *sketch1(dynamic_cast<Sketch *>(nXObject1));
Features::Feature *feature1;
feature1 = sketch1->Feature();
feature1->SetName("XY-Plane-Sketch");
sketchInPlaceBuilder1->Destroy();
//1active sketch
sketch1->Activate(Sketch::ViewReorientFalse);
double height1 = this->expressionHeight1->GetProperties()->GetDouble("Value");
double height2 = this->expressionHeight2->GetProperties()->GetDouble("Value");
double length = this->expressionLength->GetProperties()->GetDouble("Value");
// 2.1create geometry
Point3d startPoint1(0.0, 0.0, 0.0);
Point3d endPoint1(0, height1, 0.0);
Point3d endPoint2(length, height1, 0.0);
Point3d endPoint3(length, height1-height2, 0.0);
Point3d origin = sketch1->Origin();
Point *originPoint = workPart->Points()->CreatePoint(origin);
Line *line1,*line2,*line3,*line4;
line1 = workPart->Curves()->CreateLine(startPoint1, endPoint1);
line2 = workPart->Curves()->CreateLine(endPoint1, endPoint2);
line3 = workPart->Curves()->CreateLine(endPoint2, endPoint3);
line4 = workPart->Curves()->CreateLine(endPoint3, startPoint1);
// 2.2 add geometry
sketch1->AddGeometry(line1,Sketch::InferConstraintsOptionInferCoincidentConstraints);
sketch1->AddGeometry(line2,Sketch::InferConstraintsOptionInferCoincidentConstraints);
sketch1->AddGeometry(line3,Sketch::InferConstraintsOptionInferCoincidentConstraints);
sketch1->AddGeometry(line4,Sketch::InferConstraintsOptionInferCoincidentConstraints);
//3add constraints ( gemo)
Sketch::ConstraintGeometry geomline1;
geomline1.Geometry = line1;
geomline1.PointType = Sketch::ConstraintPointTypeNone;
geomline1.SplineDefiningPointIndex = 0;
sketch1->CreateVerticalConstraint(geomline1);
Sketch::ConstraintGeometry geomline2;
geomline2.Geometry = line2;
geomline2.PointType = Sketch::ConstraintPointTypeNone;
geomline2.SplineDefiningPointIndex = 0;
sketch1->CreateHorizontalConstraint(geomline2);
Sketch::ConstraintGeometry geomline3;
geomline3.Geometry = line3;
geomline3.PointType = Sketch::ConstraintPointTypeNone;
geomline3.SplineDefiningPointIndex = 0;
sketch1->CreateVerticalConstraint(geomline3);
Sketch::ConstraintGeometry geomline1_startPoint;
geomline1_startPoint.Geometry = line1;
geomline1_startPoint.PointType = Sketch::ConstraintPointTypeStartVertex;
geomline1.SplineDefiningPointIndex = 0;
Sketch::ConstraintGeometry geomline2_originPoint;
geomline2_originPoint.Geometry = originPoint;
geomline2_originPoint.PointType = Sketch::ConstraintPointTypeNone;
geomline2_originPoint.SplineDefiningPointIndex = 0;
sketch1->CreateCoincidentConstraint(geomline1_startPoint,geomline2_originPoint);
//4add constraints (dimension)
NXObject *nullNXObject(NULL);
stringstream s_height1,s_height2,s_length;
s_height1 <<height1;
s_height2 <<height2;
s_length <<length;
Expression *expression1,*expression2,*expression3;
expression1 = workPart->Expressions()->CreateSystemExpression(s_height1.str());
expression2 = workPart->Expressions()->CreateSystemExpression(s_length.str());
expression3 = workPart->Expressions()->CreateSystemExpression(s_height2.str());
// line1 dimension
Sketch::DimensionGeometry dimLine1_startPoint;
dimLine1_startPoint.Geometry = line1;
dimLine1_startPoint.AssocType = Sketch::AssocTypeStartPoint;
dimLine1_startPoint.AssocValue = 0;
dimLine1_startPoint.HelpPoint.X = 0.0;
dimLine1_startPoint.HelpPoint.Y = 0.0;
dimLine1_startPoint.HelpPoint.Z = 0.0;
dimLine1_startPoint.View = nullNXObject;
Sketch::DimensionGeometry dimLine1_endPoint;
dimLine1_endPoint.Geometry = line1;
dimLine1_endPoint.AssocType = Sketch::AssocTypeEndPoint;
dimLine1_endPoint.AssocValue = 0;
dimLine1_endPoint.HelpPoint.X = 0.0;
dimLine1_endPoint.HelpPoint.Y = 0.0;
dimLine1_endPoint.HelpPoint.Z = 0.0;
dimLine1_endPoint.View = nullNXObject;
Point3d dimOrigin1(-100, height1/2, 0.0);
sketch1->CreateDimension(Sketch::ConstraintTypeParallelDim, dimLine1_startPoint, dimLine1_endPoint, dimOrigin1, expression1, Sketch::DimensionOptionCreateAsDriving);
// line2 dimension
Sketch::DimensionGeometry dimLine2_startPoint;
dimLine2_startPoint.Geometry = line2;
dimLine2_startPoint.AssocType = Sketch::AssocTypeStartPoint;
dimLine2_startPoint.AssocValue = 0;
dimLine2_startPoint.HelpPoint.X = 0.0;
dimLine2_startPoint.HelpPoint.Y = 0.0;
dimLine2_startPoint.HelpPoint.Z = 0.0;
dimLine2_startPoint.View = nullNXObject;
Sketch::DimensionGeometry dimLine2_endPoint;
dimLine2_endPoint.Geometry = line2;
dimLine2_endPoint.AssocType = Sketch::AssocTypeEndPoint;
dimLine2_endPoint.AssocValue = 0;
dimLine2_endPoint.HelpPoint.X = 0.0;
dimLine2_endPoint.HelpPoint.Y = 0.0;
dimLine2_endPoint.HelpPoint.Z = 0.0;
dimLine2_endPoint.View = nullNXObject;
Point3d dimOrigin2(length /2,100 + height1, 0.0);
sketch1->CreateDimension(Sketch::ConstraintTypeParallelDim, dimLine2_startPoint, dimLine2_endPoint, dimOrigin2, expression2, Sketch::DimensionOptionCreateAsDriving);
// line3 dimension
Sketch::DimensionGeometry dimLine3_startPoint;
dimLine3_startPoint.Geometry = line3;
dimLine3_startPoint.AssocType = Sketch::AssocTypeStartPoint;
dimLine3_startPoint.AssocValue = 0;
dimLine3_startPoint.HelpPoint.X = 0.0;
dimLine3_startPoint.HelpPoint.Y = 0.0;
dimLine3_startPoint.HelpPoint.Z = 0.0;
dimLine3_startPoint.View = nullNXObject;
Sketch::DimensionGeometry dimLine3_endPoint;
dimLine3_endPoint.Geometry = line3;
dimLine3_endPoint.AssocType = Sketch::AssocTypeEndPoint;
dimLine3_endPoint.AssocValue = 0;
dimLine3_endPoint.HelpPoint.X = 0.0;
dimLine3_endPoint.HelpPoint.Y = 0.0;
dimLine3_endPoint.HelpPoint.Z = 0.0;
dimLine3_endPoint.View = nullNXObject;
Point3d dimOrigin3( 100 + length, height1-height2+ height2 /2 , 0.0);
sketch1->CreateDimension(Sketch::ConstraintTypeParallelDim, dimLine3_startPoint, dimLine3_endPoint, dimOrigin3, expression3, Sketch::DimensionOptionCreateAsDriving);
//5 update & deactive
sketch1->Update();
sketch1->Deactivate(Sketch::ViewReorientFalse,Sketch::UpdateLevelModel);
delete expression1;
delete expression2;
delete expression3;
}
PLM之家NX9.0二次开发视频教程 31 NXOpen C++草图的创建(1)项目介绍
http://player.youku.com/player.php/sid/XMzA4OTY2Mjk2NA==/v.swf
PLM之家NX9.0二次开发视频教程 31 NXOpen C++草图的创建(2)对话框UI设计
http://player.youku.com/player.php/sid/XMzA4OTY2NTE0OA==/v.swf
PLM之家NX9.0二次开发视频教程 31 NXOpen C++草图的创建(3)项目创建
http://player.youku.com/player.php/sid/XMzA4OTY2NTMwMA==/v.swf
PLM之家NX9.0二次开发视频教程 31 NXOpen C++草图的创建(4)草图特征创建
http://player.youku.com/player.php/sid/XMzA4OTY3OTIzNg==/v.swf
PLM之家NX9.0二次开发视频教程 31 NXOpen C++草图的创建(5)添加几何到草图
http://player.youku.com/player.php/sid/XMzA4OTY3ODk2NA==/v.swf
PLM之家NX9.0二次开发视频教程 31 NXOpen C++草图的创建(6)添加草图几何约束
http://player.youku.com/player.php/sid/XMzA4OTY5MjkwMA==/v.swf
<p></p><div><br></div><div><br></div><div><h3 style="margin-bottom: 8px; font-size: 18px; line-height: 28px; color: rgb(51, 51, 51); font-family: "Microsoft Yahei", Simsun, Gotham-Medium, Arial;">PLM之家NX9.0二次开发视频教程 31 NXOpen C++草图的创建(7)添加草图尺寸约束</h3></div><div>http://player.youku.com/player.php/sid/XMzA5NDAyNzQzNg==/v.swf</div> <p></p><div><br></div><div><h3 style="margin-bottom: 8px; font-size: 18px; line-height: 28px; color: rgb(51, 51, 51); font-family: "Microsoft Yahei", Simsun, Gotham-Medium, Arial;">PLM之家-NX9.0二次开发实例31 NXOpen C++草图的创建(8)尺寸和UI关联</h3></div><div>http://player.youku.com/player.php/sid/XMzA5NDAyODAzMg==/v.swf</div> 支持，不过今天没视频啊 :)老大，您的教程很给力哟，什么时候才能膜拜呢？？ 视频呢，我在等啊 这部分先更新到这里
学习一下谢谢 谢谢分享 想要看看啊 奈斯啊。