[每日一码] 获得图中所有不可见的实体到AcDbObjectIdArray

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1. /////////////////////////////////////////////////////
2. //  get invisible entities
3. /////////////////////////////////////////////////////
6. Acad::ErrorStatus
7. getInvisible(const char *blkName, AcDbObjectIdArray& ents)
8. {
9. AcDbBlockTable *pBT = NULL;
10.     Acad::ErrorStatus es;
13.     if (Acad::eOk != (es=acdbHostApplicationServices()->workingDatabase()->getBlockTable(pBT, AcDb::kForRead)))
14.   return es;
17.     AcDbBlockTableRecord *pBTR = NULL;
20.     if ( Acad::eOk != (es=pBT->getAt(blkName, pBTR, AcDb::kForRead))) {
21.   pBT->close();
22.   return es;
23. }
26. pBT->close();
28. AcDbBlockTableRecordIterator *pBTRIter = NULL;
29. AcDbEntity *pEnt = NULL;
32. for(pBTR->newIterator( pBTRIter ); !pBTRIter->done(); pBTRIter->step()) {
33.   pBTRIter->getEntity( pEnt, AcDb::kForRead );
34.   
35.   if (NULL != pEnt) {
36.    if (AcDb::kInvisible == pEnt->visibility())
37.     ents.append( pEnt->objectId() );
40.    pEnt->close();
41.    pEnt = NULL;
42.   }
43. }
44. delete pBTRIter;
45. pBTR->close();
48. return Acad::eOk;
49. }

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