arx 获取三维实体边、面，并高亮

admin

1. void
   
2. highlightEdge(const AcDbObjectId& objId, const int marker)
   
3. {
   
4.     TCHAR dummy[133]; // space for acedGetStringB pauses below
   
5. 
   
6.     AcDbEntity *pEnt;
   
7.     acdbOpenAcDbEntity(pEnt, objId, AcDb::kForRead);
   
8.     AcGePoint3d pickpnt;
   
9.     AcGeMatrix3d xform;
   
10.     int numIds;
    
11.     AcDbFullSubentPath *subentIds;
    
12.     pEnt->getSubentPathsAtGsMarker(AcDb::kEdgeSubentType,
    
13.         marker, pickpnt, xform, numIds, subentIds);
    
14. 
    
15.     // At this point the subentId's variable contains the
    
16.     // address of an array of AcDbFullSubentPath objects.
    
17.     // The array should be one element long, so the picked
    
18.     // edge's AcDbFullSubentPath is in subentIds[0].
    
19.     //
    
20.     // For objects with no edges (such as a sphere), the
    
21.     // code to highlight an edge is meaningless and must
    
22.     // be skipped.
    
23.     //
    
24.     if (numIds > 0) {
    
25.         // Highlight the edge.
    
26.         //
    
27.         pEnt->highlight(subentIds[0]);
    
28. 
    
29.         // Pause to let user see the effect.
    
30.         //
    
31.         acedGetString(0, _T("\npress <RETURN> to continue..."),
    
32.             dummy);
    
33. 
    
34.         // Unhighlight the picked edge.
    
35.         //
    
36.         pEnt->unhighlight(subentIds[0]);
    
37. 
    
38.         // Get a copy of the edge, and add it to the database.
    
39.         //
    
40.         AcDbEntity *pEntCpy = pEnt->subentPtr(subentIds[0]);
    
41.         AcDbObjectId objId;
    
42.         addToModelSpace(objId, pEntCpy);
    
43. 
    
44.     }
    
45.     delete []subentIds;
    
46. 
    
47.     pEnt->close();
    
48. }
    
49. void
    
50. highlightFaces(const AcDbObjectId& objId, const int marker)
    
51. {
    
52.     TCHAR dummy[133];
    
53. 
    
54.     AcDbEntity *pEnt;
    
55.     acdbOpenAcDbEntity(pEnt, objId, AcDb::kForRead);
    
56. 
    
57.     // Get the subentIds for the faces.
    
58.     //
    
59.     AcGePoint3d pickpnt;
    
60.     AcGeMatrix3d xform;
    
61.     int numIds;
    
62.     AcDbFullSubentPath *subentIds;
    
63.     pEnt->getSubentPathsAtGsMarker(AcDb::kFaceSubentType,
    
64.         marker, pickpnt, xform, numIds, subentIds);
    
65. 
    
66.     // Walk the subentIds list, highlighting each face subentity.
    
67.     //
    
68.     for (int i = 0;i < numIds; i++) {
    
69.         pEnt->highlight(subentIds[i]); // Highlight face.
    
70. 
    
71.         // Pause to let the user see the effect.
    
72.         //
    
73.         acedGetString(0, _T("\npress <RETURN> to continue..."),
    
74.             dummy);
    
75. 
    
76.         pEnt->unhighlight(subentIds[i]);
    
77.     }
    
78.     delete []subentIds;
    
79.     pEnt->close();
    
80. }
    
81. void
    
82. highlightAll(const AcDbObjectId& objId)
    
83. {
    
84.     TCHAR dummy[133];
    
85. 
    
86.     AcDbEntity *pEnt;
    
87.     acdbOpenAcDbEntity(pEnt, objId, AcDb::kForRead);
    
88. 
    
89.     // Highlight the whole solid.
    
90.     //
    
91.     pEnt->highlight();
    
92. 
    
93.     // Pause to let user see the effect.
    
94.     //
    
95.     acedGetString(0, _T("\npress <RETURN> to continue..."),
    
96.         dummy);
    
97. 
    
98.     pEnt->unhighlight();
    
99.     pEnt->close();
    
100. }
     
101. 
     
102. 
     
103. Acad::ErrorStatus
     
104. addToModelSpace(AcDbObjectId &objId, AcDbEntity* pEntity)
     
105. {
     
106.     AcDbBlockTable *pBlockTable;
     
107.     AcDbBlockTableRecord *pSpaceRecord;
     
108. 
     
109.     acdbHostApplicationServices()->workingDatabase()
     
110.         ->getSymbolTable(pBlockTable, AcDb::kForRead);
     
111. 
     
112.     pBlockTable->getAt(ACDB_MODEL_SPACE, pSpaceRecord,
     
113.         AcDb::kForWrite);
     
114. 
     
115.     pSpaceRecord->appendAcDbEntity(objId, pEntity);
     
116. 
     
117.     pBlockTable->close();
     
118.     pEntity->close();
     
119.     pSpaceRecord->close();
     
120. 
     
121.     return Acad::eOk;
     
122. }
     

复制代码