NX二次开发源码： 创建草图并通过草图做出回转体

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通过NX开发进行草图的创建，创建草图过程包括基本曲线的创建以及约束。
草图的约束分为几何约束和尺寸约束，通过代码的约束使得草图完全约束。
草图完成后，可以通过回转体进行旋转，此处直接做出简单的例子。
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7 I3 T/ D6 T! ]0 N# r$ q效果如下：
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比较乱，仅供参考
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1. <p>void basicFeatures::createSketch()
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2. {</p><p>{
   
3.     Session *theSession = Session::GetSession();
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4.     Part *workPart(theSession->Parts()->Work());
   
5.     Part *displayPart(theSession->Parts()->Display());
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6.     Sketch *nullSketch(NULL);
   
7.     SketchInPlaceBuilder *sketchInPlaceBuilder1;
   
8.     sketchInPlaceBuilder1 = workPart->Sketches()->CreateNewSketchInPlaceBuilder(nullSketch);
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9.     sketchInPlaceBuilder1->Plane()->SetMethod(PlaneTypes::MethodTypeFixedZ);
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10.     Point3d origin1(0.0, 0.0, 0.0);
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11.     sketchInPlaceBuilder1->Plane()->SetOrigin(origin1);
    
12.     sketchInPlaceBuilder1->Plane()->Evaluate();</p><p> // set the reference</p><p> theSession->Preferences()->Sketch()->SetCreateInferredConstraints(true);
    
13.    
    
14.     theSession->Preferences()->Sketch()->SetContinuousAutoDimensioning(false);
    
15.    
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16.     theSession->Preferences()->Sketch()->SetDimensionLabel(Preferences::SketchPreferences::DimensionLabelTypeExpression);
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17.    
    
18.     theSession->Preferences()->Sketch()->SetTextSizeFixed(true);
    
19.    
    
20.     theSession->Preferences()->Sketch()->SetFixedTextSize(3.0);
    
21.    
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22.     theSession->Preferences()->Sketch()->SetConstraintSymbolSize(3.0);
    
23.    
    
24.     theSession->Preferences()->Sketch()->SetDisplayObjectColor(false);
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25.    
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26.     theSession->Preferences()->Sketch()->SetDisplayObjectName(true);</p><p>   
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27.     NXObject *nXObject1;
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28.     nXObject1 = sketchInPlaceBuilder1->Commit();
    
29.    
    
30.     Sketch *sketch1(dynamic_cast<Sketch *>(nXObject1));
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31.     Features::Feature *feature1;
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32.     feature1 = sketch1->Feature();</p><p>
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33.     sketchInPlaceBuilder1->Destroy();</p><p>
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34. sketch1->Activate(Sketch::ViewReorientFalse);
    
35. 
    
36. // define the dimensions
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37.     double heigth1 = this->doubleHeight1->GetProperties()->GetDouble("Value");
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38. double heigth2 = this->doubleHeight2->GetProperties()->GetDouble("Value");
    
39. double length = this->doubleLength->GetProperties()->GetDouble("Value");
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40. char msg1[UF_MAX_EXP_BUFSIZE],msg2[UF_MAX_EXP_BUFSIZE],msg3[UF_MAX_EXP_BUFSIZE];
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41. sprintf(msg1,"%f",heigth1);
    
42. sprintf(msg2,"%f",heigth2);
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43. sprintf(msg3,"%f",length);
    
44. Expression *height1exp,*height2exp,*lengthexp;
    
45. height1exp= workPart->Expressions()->CreateSystemExpression(msg1);
    
46. height2exp= workPart->Expressions()->CreateSystemExpression(msg2);
    
47. lengthexp= workPart->Expressions()->CreateSystemExpression(msg3);
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48. // these for the dimension position
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49. Point3d dimOrigin1(-100, heigth1/2, 0.0);
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50. Point3d dimOrigin2(length/2, heigth1+100, 0.0);
    
51. Point3d dimOrigin3(length+100, heigth1-heigth2/2, 0.0);</p><p>  // add curves
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52.     Point3d startPoint1(0.0, 0.0, 0.0);
    
53. Point3d endPoint1(0.0,heigth1,0.0);
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54. Point3d endPoint2(length,heigth1,0.0);
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55. Point3d endPoint3(length,heigth1-heigth2,0.0);
    
56.     Line *line1,*line2,*line3,*line4;
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57.     line1 = workPart->Curves()->CreateLine(startPoint1, endPoint1);
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58. line2 = workPart->Curves()->CreateLine(endPoint1, endPoint2);
    
59. line3 = workPart->Curves()->CreateLine(endPoint2, endPoint3);
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60. line4 = workPart->Curves()->CreateLine(endPoint3, startPoint1);
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61. theSession->ActiveSketch()->AddGeometry(line1, Sketch::InferConstraintsOptionInferCoincidentConstraints);
    
62. theSession->ActiveSketch()->AddGeometry(line2, Sketch::InferConstraintsOptionInferCoincidentConstraints);
    
63. theSession->ActiveSketch()->AddGeometry(line3, Sketch::InferConstraintsOptionInferCoincidentConstraints);
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64. theSession->ActiveSketch()->AddGeometry(line4, Sketch::InferConstraintsOptionInferCoincidentConstraints);
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65.    </p><p> // add constraints
    
66. //..
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67. // for line1
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68. Sketch::ConstraintGeometry geopoint1;
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69. geopoint1.Geometry = line1;
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70. geopoint1.PointType = Sketch::ConstraintPointTypeStartVertex;
    
71. geopoint1.SplineDefiningPointIndex = 0;
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72. // find the (0,0,0) point
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73. Sketch::ConstraintGeometry geopoint2;
    
74. Point *pointOriginal;
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75. pointOriginal = workPart->Points()->CreatePoint(sketch1->Origin());
    
76. geopoint2.Geometry = pointOriginal;
    
77. geopoint2.PointType = Sketch::ConstraintPointTypeStartVertex;
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78. geopoint2.SplineDefiningPointIndex = 0;
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79. theSession->ActiveSketch()->CreateCoincidentConstraint(geopoint1,geopoint2);</p><p> Sketch::ConstraintGeometry geoline1;
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80. geoline1.Geometry = line1;
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81. geoline1.PointType = Sketch::ConstraintPointTypeNone;
    
82. geoline1.SplineDefiningPointIndex = 0;
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83. theSession->ActiveSketch()->CreateVerticalConstraint(geoline1);
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84. //..
    
85. // for line2
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86. Sketch::ConstraintGeometry geoline2;
    
87. geoline2.Geometry = line2;
    
88. geoline2.PointType = Sketch::ConstraintPointTypeNone;
    
89. geoline2.SplineDefiningPointIndex = 0;
    
90. theSession->ActiveSketch()->CreateHorizontalConstraint(geoline2);
    
91. //..
    
92. // for line3
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93. Sketch::ConstraintGeometry geoline3;
    
94. geoline3.Geometry = line3;
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95. geoline3.PointType = Sketch::ConstraintPointTypeNone;
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96. geoline3.SplineDefiningPointIndex = 0;
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97. theSession->ActiveSketch()->CreateVerticalConstraint(geoline3);
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98. // use this method to create the constraints
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99. /*SketchConstraintBuilder *line3constraint;
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100. line3constraint= workPart->Sketches()->CreateConstraintBuilder();
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101. line3constraint->GeometryToConstrain()->Add(line3);
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102. line3constraint->SetConstraintType(SketchConstraintBuilder::ConstraintVertical);
     
103. line3constraint->Commit();
     
104.     line3constraint->Destroy();*/
     
105.    
     
106. // add dimension
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107. //..
     
108. // for line1
     
109. Sketch::DimensionGeometry dimobject1_start;
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110. dimobject1_start.AssocType = Sketch::AssocTypeStartPoint;
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111. dimobject1_start.AssocValue = 0;
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112. dimobject1_start.Geometry = line1;
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113. dimobject1_start.HelpPoint.X = 0 ;
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114. dimobject1_start.HelpPoint.Y = 0 ;
     
115. dimobject1_start.HelpPoint.Z = 0 ;
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116. NXObject *nullNXObject1(NULL);
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117. dimobject1_start.View = nullNXObject1;</p><p> Sketch::DimensionGeometry dimobject1_end;
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118. dimobject1_end.AssocType = Sketch::AssocTypeEndPoint;
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119. dimobject1_end.AssocValue = 0;
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120. dimobject1_end.Geometry = line1;
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121. dimobject1_end.HelpPoint.X = 0 ;
     
122. dimobject1_end.HelpPoint.Y = 0 ;
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123. dimobject1_end.HelpPoint.Z = 0 ;
     
124. dimobject1_end.View = nullNXObject1;</p><p> SketchDimensionalConstraint *sketchDimensionalConstraint1 = theSession->ActiveSketch()->CreateDimension(Sketch::ConstraintTypeVerticalDim,dimobject1_start,dimobject1_end,dimOrigin1,height1exp,Sketch::DimensionOptionCreateAsDriving);</p><p>    Annotations::Dimension *dimension1;
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125.     dimension1 = sketchDimensionalConstraint1->AssociatedDimension();</p><p>
     
126. //..
     
127. // for line2
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128. Sketch::DimensionGeometry dimobject2_start;
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129. dimobject2_start.AssocType = Sketch::AssocTypeStartPoint;
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130. dimobject2_start.AssocValue = 0;
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131. dimobject2_start.Geometry = line2;
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132. dimobject2_start.HelpPoint.X = 0 ;
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133. dimobject2_start.HelpPoint.Y = 0 ;
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134. dimobject2_start.HelpPoint.Z = 0 ;
     
135. dimobject2_start.View = nullNXObject1;</p><p> Sketch::DimensionGeometry dimobject2_end;
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136. dimobject2_end.AssocType = Sketch::AssocTypeEndPoint;
     
137. dimobject2_end.AssocValue = 0;
     
138. dimobject2_end.Geometry = line2;
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139. dimobject2_end.HelpPoint.X = 0 ;
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140. dimobject2_end.HelpPoint.Y = 0 ;
     
141. dimobject2_end.HelpPoint.Z = 0 ;
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142. dimobject2_end.View = nullNXObject1;</p><p> SketchDimensionalConstraint *sketchDimensionalConstraint2 = theSession->ActiveSketch()->CreateDimension(Sketch::ConstraintTypeHorizontalDim,dimobject2_start,dimobject2_end,dimOrigin2,lengthexp,Sketch::DimensionOptionCreateAsDriving);</p><p>    Annotations::Dimension *dimension2;
     
143.     dimension2 = sketchDimensionalConstraint2->AssociatedDimension();</p><p> // for line3
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144. Sketch::DimensionGeometry dimobject3_start;
     
145. dimobject3_start.AssocType = Sketch::AssocTypeStartPoint;
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146. dimobject3_start.AssocValue = 0;
     
147. dimobject3_start.Geometry = line3;
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148. dimobject3_start.HelpPoint.X = 0 ;
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149. dimobject3_start.HelpPoint.Y = 0 ;
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150. dimobject3_start.HelpPoint.Z = 0 ;
     
151. dimobject3_start.View = nullNXObject1;</p><p> Sketch::DimensionGeometry dimobject3_end;
     
152. dimobject3_end.AssocType = Sketch::AssocTypeEndPoint;
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153. dimobject3_end.AssocValue = 0;
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154. dimobject3_end.Geometry = line3;
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155. dimobject3_end.HelpPoint.X = 0 ;
     
156. dimobject3_end.HelpPoint.Y = 0 ;
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157. dimobject3_end.HelpPoint.Z = 0 ;
     
158. dimobject3_end.View = nullNXObject1;</p><p> SketchDimensionalConstraint *sketchDimensionalConstraint3 = theSession->ActiveSketch()->CreateDimension(Sketch::ConstraintTypeVerticalDim,dimobject3_start,dimobject3_end,dimOrigin3,height2exp,Sketch::DimensionOptionCreateAsDriving);</p><p>    Annotations::Dimension *dimension3;
     
159.     dimension3 = sketchDimensionalConstraint3->AssociatedDimension();</p><p> //workPart->Expressions()->Delete(height1exp);</p><p> theSession->ActiveSketch()->Update();</p><p> theSession->ActiveSketch()->Deactivate(Sketch::ViewReorientFalse,Sketch::UpdateLevelModel);
     
160. 
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161. /*</p><p> // revolve the body</p><p> */
     
162. Features::Feature *nullFeatures_Feature(NULL);
     
163. Features::RevolveBuilder *revolveBuilder1;
     
164.     revolveBuilder1 = workPart->Features()->CreateRevolveBuilder(nullFeatures_Feature);
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165.     revolveBuilder1->Limits()->StartExtend()->Value()->SetRightHandSide("0");
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166.     revolveBuilder1->Limits()->EndExtend()->Value()->SetRightHandSide("360");
     
167.     revolveBuilder1->SetTolerance(0.01);
     
168. Section *section1;
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169.     section1 = workPart->Sections()->CreateSection(0.0095, 0.01, 0.5);
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170.     revolveBuilder1->SetSection(section1);
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171.    
     
172. section1->SetAllowedEntityTypes(Section::AllowTypesOnlyCurves);
     
173.    
     
174. std::vector<Features::Feature *> features1(1);
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175.     features1[0] = feature1;
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176.     CurveFeatureRule *curveFeatureRule1;
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177.     curveFeatureRule1 = workPart->ScRuleFactory()->CreateRuleCurveFeature(features1);
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178.    
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179.     section1->AllowSelfIntersection(false);
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180.    
     
181.     std::vector<SelectionIntentRule *> rules1(1);
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182.     rules1[0] = curveFeatureRule1;
     
183.     NXObject *nullNXObject(NULL);
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184.     Point3d helpPoint1(0.0, 0.0, 0.0);
     
185.     section1->AddToSection(rules1, nullNXObject, nullNXObject, nullNXObject, helpPoint1, Section::ModeCreate, false);
     
186. 
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187. // define the axis</p><p>    Direction *direction1;
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188.     direction1 = workPart->Directions()->CreateDirection(line2, SenseForward, SmartObject::UpdateOptionWithinModeling);
     
189.    
     
190.     Point *nullPoint(NULL);
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191.     Axis *axis1;
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192.     axis1 = workPart->Axes()->CreateAxis(nullPoint, direction1, SmartObject::UpdateOptionWithinModeling);
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193. 
     
194. revolveBuilder1->SetAxis(axis1);</p><p> // commit feature
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195. Features::Feature *feature2;
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196.     feature2 = revolveBuilder1->CommitFeature();
     
197. revolveBuilder1->Destroy();
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198. }</p><p>}
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199. </p><p> </p>

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