读写DWG

转载至:http://hi.baidu.com/kcpnevergiveup/item/60d43edea9522f10e1f46f4e

void createDwg()
{
AcDbDatabase *pDb = new AcDbDatabase();

AcDbBlockTable *pBtbl;
pDb->getSymbolTable(pBtbl, AcDb::kForRead);

AcDbBlockTableRecord *pBtblRcd;
pBtbl->getAt(ACDB_MODEL_SPACE, pBtblRcd,
AcDb::kForWrite);
pBtbl->close();

AcDbCircle *pCir1 = new AcDbCircle(AcGePoint3d(1,1,1),
AcGeVector3d(0,0,1),
1.0),
*pCir2 = new AcDbCircle(AcGePoint3d(4,4,4),
AcGeVector3d(0,0,1),
2.0);

pBtblRcd->appendAcDbEntity(pCir1);
pCir1->close();

pBtblRcd->appendAcDbEntity(pCir2);
pCir2->close();
pBtblRcd->close();

// AcDbDatabase::saveAs() does NOT automatically
// append a DWG file extension, so it
// must be specified.
//
pDb->saveAs(_T(“I:\\test1.dwg”));
delete pDb;

}
void readDwg()
{
// Set constructor parameter to kFalse so that the
// database will be constructed empty. This way only
// what is read in will be in the database.
//
AcDbDatabase *pDb = new AcDbDatabase(Adesk::kFalse);

// The AcDbDatabase::readDwgFile() function
// automatically appends a DWG extension if it is not
// specified in the filename parameter.
//
pDb->readDwgFile(_T(“test1.dwg”));

// Open the model space block table record.
//
AcDbBlockTable *pBlkTbl;
pDb->getSymbolTable(pBlkTbl, AcDb::kForRead);

AcDbBlockTableRecord *pBlkTblRcd;
pBlkTbl->getAt(ACDB_MODEL_SPACE, pBlkTblRcd,
AcDb::kForRead);
pBlkTbl->close();

AcDbBlockTableRecordIterator *pBlkTblRcdItr;
pBlkTblRcd->newIterator(pBlkTblRcdItr);

AcDbEntity *pEnt;
for (pBlkTblRcdItr->start(); !pBlkTblRcdItr->done();
pBlkTblRcdItr->step())
{
pBlkTblRcdItr->getEntity(pEnt,
AcDb::kForRead);
acutPrintf(_T(“classname: %s\n”),
(pEnt->isA())->name());
pEnt->close();
}
pBlkTblRcd->close();
delete pBlkTblRcdItr;
delete pDb;
}