objectarx之遍历当前模型空间中的所有实体，并对每个实体进行炸开

//炸开
void BomEntity()
{
AcDbBlockTable *pBlkTbl;
acdbHostApplicationServices()->workingDatabase()->getBlockTable(pBlkTbl, AcDb::kForRead);

//获得模型空间的块表记录
AcDbBlockTableRecord *pBlkTblRcd;
pBlkTbl->getAt(ACDB_MODEL_SPACE, pBlkTblRcd,AcDb::kForRead);
pBlkTbl->close();

//创建块表记录遍历器
AcDbBlockTableRecordIterator *pItr; //块表记录遍历器
pBlkTblRcd -> newIterator(pItr);
pBlkTblRcd->close();
AcDbEntity *pEnt = NULL; //遍历的临时实体指针
for(pItr->start();!pItr->done();pItr->step()){
//利用遍历器获得每一个实体
pItr->getEntity(pEnt,AcDb::kForWrite);

//块参照
if (pEnt->isKindOf(AcDbBlockReference::desc()))
{
//炸开
AcDbVoidPtrArray ents =Explode(pEnt);
//循环遍历炸开的实体
for(int i = 0; i < ents.length(); ++i)
{
AcDbEntity* pSubEnt = (AcDbEntity*)ents[i];
AcDbEntity* entity = AcDbEntity::cast(pSubEnt);
AppendToDatabase(entity);
entity->close();
}
pEnt->erase();
}

pEnt->close();
}
delete pItr;
}