改变多段线区直 弧线

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1. 代码：
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>
14. void ZffMyProjectchangeline()
15. {
17. ads采用name polyLinename;
18. ads采用point pnt;
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采用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采用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);
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. }
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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