[求助]：请问一个问题,谢谢!

leagoti

//复制对象
void cloneSameOwnerObjects()
{
// Step 1: Obtain the set of objects to be cloned.
ads_name sset;

if (acedSSGet(NULL, NULL, NULL, NULL, sset) != RTNORM) {
acutPrintf("\nNothing selected");
return;
}

// Step 2: Add obtained object IDs to list of objects
// to be cloned.
long length;
acedSSLength(sset, &length);
AcDbObjectIdArray objList;
AcDbObjectId ownerId = AcDbObjectId::kNull;

for (int i = 0; i < length; i++) {
ads_name ent;
acedSSName(sset, i, ent);
AcDbObjectId objId;
acdbGetObjectId(objId, ent);

// Check to be sure this has the same owner as the first
// object.
//
AcDbObject *pObj;
acdbOpenObject(pObj, objId, AcDb::kForRead);

if (pObj->ownerId() == ownerId)
objList.append(objId);
else if (i == 0) {
ownerId = pObj->ownerId();
objList.append(objId);
}
pObj->close();
}

acedSSFree(sset);

// Step 3: Get the object ID of the desired owner for
// the cloned objects. We'll use model space for
// this example.
//
AcDbBlockTable *pBlockTable;
acdbHostApplicationServices()->workingDatabase()
->getSymbolTable(pBlockTable, AcDb::kForRead);

AcDbObjectId modelSpaceId;
pBlockTable->getAt(ACDB_MODEL_SPACE, modelSpaceId);
pBlockTable->close();

// Step 4: Create a new ID map.
//
AcDbIdMapping idMap;

// Step 5: Call deepCloneObjects().
//
acdbHostApplicationServices()->workingDatabase()
->deepCloneObjects(objList, modelSpaceId, idMap);

// Now we can go through the ID map and do whatever we'd
// like to the original and/or clone objects.
//
// For this example, we'll print out the object IDs of
// the new objects resulting from the cloning process.
//
AcDbIdMappingIter iter(idMap);
for (iter.start(); !iter.done(); iter.next()) {
AcDbIdPair idPair;
iter.getMap(idPair);
if (!idPair.isCloned())
continue;
acutPrintf("\nObjectId is: %Ld",

idPair.value().asOldId());
}

}



///////////////////////////////////////////////////////
上述一个地方:
if (pObj->ownerId() == ownerId)
objList.append(objId);
else if (i == 0) {
ownerId = pObj->ownerId();
objList.append(objId);
}
加一个判断有什么用?
直接用objList.append(objId)代替可否?

whsmh320

确保加入的ObjId正确。