改变多段线区直 弧线

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1. 代码：
   
2. 
   
3. #include "StdAfx.h"
   
4. #include "StdArx.h"
   
5. #include <dbpl.h>
   
6. #include "..\..\Common\Others\ConvertUtil.h"
   
7. #include <geassign.h>
   
8. #include "..\..\Common\Entity\ArcUtil.h"
   
9. #include "..\..\Common\Document\DwgDatabaseUtil.h"
   
10. #include <afxwin.h>
    
11. #include <dbents.h>
    
12. 
    
13. 
    
14. void ZffMyProjectchangeline()
    
15. {
    
16. 
    
17. ads_name polyLinename;
    
18. ads_point pnt;
    
19. 
    
20. if (acedEntSel("\n请选择多段线的条直线段!",polyLinename,pnt)!=RTNORM)
    
21. {
    
22. return;
    
23. }
    
24. AcDbObjectId polyLineId;
    
25. acdbGetObjectId(polyLineId,polyLinename);
    
26. AcDbEntity *pEnt=NULL;
    
27. acdbOpenObject(pEnt,polyLineId,AcDb::kForWrite);
    
28. if (pEnt->isKindOf(AcDbPolyline::desc()))
    
29. {
    
30. AcDbPolyline *pPolyline=AcDbPolyline::cast(pEnt);
    
31. pEnt->close();
    
32. int vtnum=pPolyline->numVerts();
    
33. AcGePoint3dArray pts;
    
34. AcGePoint3d pt;
    
35. for(int i=0; i<vtnum; i++)
    
36. {
    
37. pPolyline->getPointAt(i, pt);
    
38. pts.append(pt);
    
39. }
    
40. AcDbVoidPtrArray curves;
    
41. pPolyline->getSplitCurves(pts,curves);
    
42. bool nRb=true;
    
43. for (i=0;i<curves.length();i++)
    
44. {
    
45. AcDbCurve *pCurve=static_cast<AcDbCurve*>(curves[i]);
    
46. if (nRb)
    
47. {
    
48. AcGeLine2d geLine;
    
49. AcGePoint3d pt1,pt2;
    
50. pCurve->getStartPoint(pt1);
    
51. pCurve->getEndPoint(pt2);
    
52. AcGePoint2d pt12d,pt22d,pnt2d,pt2d;
    
53. ads_point pt;
    
54. AcGePoint3d ptOnArc;
    
55. pt12d=CConvertUtil::ToPoint2d(pt1);
    
56. pt22d=CConvertUtil::ToPoint2d(pt2);
    
57. pnt2d=CConvertUtil::ToPoint2d(asPnt3d(pnt));
    
58. geLine.set(pt12d,pt22d);
    
59. double tol =1;
    
60. if (geLine.distanceTo(pnt2d)<tol)
    
61. {
    
62. nRb=false;
    
63. delete pCurve;
    
64. pCurve->close();
    
65. acedGetPoint(NULL,"\n输入一个点:",pt);
    
66. pt2d=CConvertUtil::ToPoint2d(asPnt3d(pt));
    
67. AcGeCircArc2d geArc(pt12d, pt2d, pt22d);
    
68. AcGePoint2d ptCenter = geArc.center();
    
69. double radius = geArc.radius();
    
70. AcGeVector2d vecStart(pt12d.x - ptCenter.x, pt12d.y - ptCenter.y);
    
71. AcGeVector2d vecEnd(pt22d.x - ptCenter.x, pt22d.y - ptCenter.y);
    
72. double startAngle = vecStart.angle();
    
73. double endAngle = vecEnd.angle();
    
74. AcDbArc *pArc=new AcDbArc(CConvertUtil::ToPoint3d(ptCenter), radius, startAngle, endAngle);
    
75. pArc->getClosestPointTo(asPnt3d(pt),ptOnArc);
    
76. 
    
77. if (CConvertUtil::ToPoint2d(ptOnArc).distanceTo(pt2d)<tol)
    
78. {
    
79. CDwgDatabaseUtil::PostToModelSpace(pArc);
    
80. }
    
81. else
    
82. {
    
83. AcDbArc *pArc2=new AcDbArc(CConvertUtil::ToPoint3d(ptCenter),radius,endAngle,startAngle);
    
84. CDwgDatabaseUtil::PostToModelSpace(pArc2);
    
85. delete pArc;
    
86. }
    
87. continue;
    
88. }
    
89. 
    
90. }
    
91. CDwgDatabaseUtil::PostToModelSpace(pCurve);
    
92. pCurve->close();
    
93. }
    
94. acdbOpenObject(pPolyline,polyLineId,AcDb::kForWrite);
    
95. pPolyline->erase();
    
96. pPolyline->close();
    
97. }
    
98. pEnt->close();
    
99. }

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