用NX Open C++画Studio Spline的访问冲突中断

p36288

我想用NX Open C++编个简单的外部程序生成一条Studio Spline曲线，直接用操作记录稍微改了一下。程序没有报错，但是调试的时候在“studioSplineBuilder1->CommitFeature()”这句（代码倒数第九行）跳出来这个中断：“***.exe 中的 0x2031f7eb 处未处理的异常: 0xC0000005: 读取位置 0x00000000 时发生访问冲突”(Unhandled exception at 0x2031f7eb in test.exe: 0xC0000005: Access violation reading location 0x00000000.)。请高手指教。
我尝试过生成直线或圆弧，都没有这个问题。
我的邮箱：p36288@gmail.com，用的是NX7.0，中文Visual Studio 2008，系统WinXP。下面是程序原文：

1. 
   
2. /* Include files */
   
3. #if ! defined ( __hp9000s800 ) && ! defined ( __sgi ) && ! defined ( __sun )
   
4. #   include <strstream>
   
5. #   include <iostream>
   
6.     using std::ostrstream;
   
7.     using std::endl;   
   
8.     using std::ends;
   
9.     using std::cerr;
   
10. #else
    
11. #   include <strstream.h>
    
12. #   include <iostream.h>
    
13. #endif
    
14. #include <uf.h>
    
15. #include <ug_session.hxx>
    
16. #include <ug_exception.hxx>
    
17. #include <uf_defs.h>
    
18. /*Your Code*/
    
19. #include <NXOpen/NXException.hxx>
    
20. #include <NXOpen/Session.hxx>
    
21. #include <NXOpen/BasePart.hxx>
    
22. #include <NXOpen/Builder.hxx>
    
23. #include <NXOpen/Features_Feature.hxx>
    
24. #include <NXOpen/Features_FeatureBuilder.hxx>
    
25. #include <NXOpen/Features_FeatureCollection.hxx>
    
26. #include <NXOpen/Features_GeometricConstraintData.hxx>
    
27. #include <NXOpen/Features_GeometricConstraintDataManager.hxx>
    
28. #include <NXOpen/Features_StudioSplineBuilder.hxx>
    
29. #include <NXOpen/Part.hxx>
    
30. #include <NXOpen/PartCollection.hxx>
    
31. #include <NXOpen/PartSaveStatus.hxx>
    
32. #include <NXOpen/Point.hxx>
    
33. #include <NXOpen/PointCollection.hxx>
    
34. #include <NXOpen/Preferences_PartModeling.hxx>
    
35. #include <NXOpen/Preferences_PartPreferences.hxx>
    
36. #include <NXOpen/Session.hxx>
    
37. #include <NXOpen/Spline.hxx>
    
38. #include <NXOpen/Update.hxx>
    
39. using namespace NXOpen;
    
40. 
    
41. /* Main routine */
    
42. extern void main( char argc, char *argv[] )
    
43. {
    
44.     Session *theSession = Session::GetSession();
    
45.     NXOpen::NXString partName = "NXcurve.prt";
    
46.     Part *workPart = theSession->Parts()->NewDisplay(partName, NXOpen::Part::UnitsInches);
    
47. /*创建Studio Spline*/
    
48.     Point3d coordinates1(-60.9672168874869, -85.3444953331698, -16.2564577575515);
    
49.     Point *point1;
    
50.     point1 = workPart->Points()->CreatePoint(coordinates1);
    
51.     Point3d coordinates2(-36.7798197522759, -26.6915553863001, 28.8322080982988);
    
52.     Point *point2;
    
53.     point2 = workPart->Points()->CreatePoint(coordinates2);
    
54.     Point3d coordinates3(-3.3110308509701, -13.9095206113823, -15.3362809033505);
    
55.     Point *point3;
    
56.     point3 = workPart->Points()->CreatePoint(coordinates3);
    
57.     Point3d coordinates4(50.4956319822501, 34.6877235376336, -42.6348609113142);
    
58.     Point *point4;
    
59.     point4 = workPart->Points()->CreatePoint(coordinates4);
    
60. 
    
61.     Features::StudioSpline *nullFeatures_StudioSpline(NULL);
    
62.     Features::StudioSplineBuilder *studioSplineBuilder1;
    
63.     studioSplineBuilder1 = workPart->Features()->CreateStudioSplineBuilder(nullFeatures_StudioSpline);
    
64.     studioSplineBuilder1->SetInputCurveOption(Features::StudioSplineBuilder::CurveOptionRetain);
    
65.     studioSplineBuilder1->SetSplineMethod(Features::StudioSplineBuilder::MethodByPoles);
    
66.     studioSplineBuilder1->SetDegree(3);
    
67.     studioSplineBuilder1->SetPeriodic(false);
    
68.     std::vector<double> knots1(0);
    
69.     studioSplineBuilder1->SetKnots(knots1);
    
70.     std::vector<double> parameters1(0);
    
71.     studioSplineBuilder1->SetParameters(parameters1);
    
72. 
    
73.     Features::GeometricConstraintData *geometricConstraintData1;
    
74.     geometricConstraintData1 = studioSplineBuilder1->ConstraintManager()->CreateGeometricConstraintData();
    
75.     geometricConstraintData1->SetPoint(point1);
    
76.     geometricConstraintData1->SetAutomaticConstraintDirection(Features::GeometricConstraintData::ParameterDirectionIso);
    
77.     geometricConstraintData1->SetAutomaticConstraintType(Features::GeometricConstraintData::AutoConstraintTypeNone);
    
78.     Direction *nullDirection(NULL);
    
79.     geometricConstraintData1->SetTangentDirection(nullDirection);
    
80.     Scalar *nullScalar(NULL);
    
81.     geometricConstraintData1->SetTangentMagnitude(nullScalar);
    
82.     Offset *nullOffset(NULL);
    
83.     geometricConstraintData1->SetCurvature(nullOffset);
    
84.     geometricConstraintData1->SetCurvatureDerivative(nullOffset);
    
85.     geometricConstraintData1->SetHasSymmetricModelingConstraint(false);
    
86. 
    
87.     Features::GeometricConstraintData *geometricConstraintData2;
    
88.     geometricConstraintData2 = studioSplineBuilder1->ConstraintManager()->CreateGeometricConstraintData();
    
89.     geometricConstraintData2->SetPoint(point2);
    
90.     geometricConstraintData2->SetAutomaticConstraintDirection(Features::GeometricConstraintData::ParameterDirectionIso);
    
91.     geometricConstraintData2->SetAutomaticConstraintType(Features::GeometricConstraintData::AutoConstraintTypeNone);
    
92.     geometricConstraintData2->SetTangentDirection(nullDirection);
    
93.     geometricConstraintData2->SetTangentMagnitude(nullScalar);
    
94.     geometricConstraintData2->SetCurvature(nullOffset);
    
95.     geometricConstraintData2->SetCurvatureDerivative(nullOffset);
    
96.     geometricConstraintData2->SetHasSymmetricModelingConstraint(false);
    
97. 
    
98.     Features::GeometricConstraintData *geometricConstraintData3;
    
99.     geometricConstraintData3 = studioSplineBuilder1->ConstraintManager()->CreateGeometricConstraintData();
    
100.     geometricConstraintData3->SetPoint(point3);
     
101.     geometricConstraintData3->SetAutomaticConstraintDirection(Features::GeometricConstraintData::ParameterDirectionIso);
     
102.     geometricConstraintData3->SetAutomaticConstraintType(Features::GeometricConstraintData::AutoConstraintTypeNone);
     
103.     geometricConstraintData3->SetTangentDirection(nullDirection);
     
104.     geometricConstraintData3->SetTangentMagnitude(nullScalar);
     
105.     geometricConstraintData3->SetCurvature(nullOffset);
     
106.     geometricConstraintData3->SetCurvatureDerivative(nullOffset);
     
107.     geometricConstraintData3->SetHasSymmetricModelingConstraint(false);
     
108. 
     
109.     Features::GeometricConstraintData *geometricConstraintData4;
     
110.     geometricConstraintData4 = studioSplineBuilder1->ConstraintManager()->CreateGeometricConstraintData();
     
111.     geometricConstraintData4->SetPoint(point4);
     
112.     geometricConstraintData4->SetAutomaticConstraintDirection(Features::GeometricConstraintData::ParameterDirectionIso);
     
113.     geometricConstraintData4->SetAutomaticConstraintType(Features::GeometricConstraintData::AutoConstraintTypeNone);
     
114.     geometricConstraintData4->SetTangentDirection(nullDirection);
     
115.     geometricConstraintData4->SetTangentMagnitude(nullScalar);
     
116.     geometricConstraintData4->SetCurvature(nullOffset);
     
117.     geometricConstraintData4->SetCurvatureDerivative(nullOffset);
     
118.     geometricConstraintData4->SetHasSymmetricModelingConstraint(false);
     
119. 
     
120.     std::vector<Features::GeometricConstraintData *> constraints1(4);
     
121.     constraints1[0] = geometricConstraintData1;
     
122.     constraints1[1] = geometricConstraintData2;
     
123.     constraints1[2] = geometricConstraintData3;
     
124.     constraints1[3] = geometricConstraintData4;
     
125.     studioSplineBuilder1->ConstraintManager()->SetContents(constraints1);
     
126. 
     
127.     Features::Feature *feature1;
     
128.     feature1 = studioSplineBuilder1->CommitFeature();
     
129. 
     
130.     Spline *spline1;
     
131.     spline1 = studioSplineBuilder1->Curve();
     
132.     studioSplineBuilder1->Destroy();
     
133. /*Save*/
     
134.     NXOpen::PartSaveStatus *partSaveStatus;
     
135.     workPart->Save(NXOpen::Part::SaveComponentsTrue, NXOpen::Part::CloseAfterSaveTrue, &partSaveStatus);
     
136. }
     

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