【转帖】problem with gettransformedcopy
 

problem with gettransformedcopy
problem with gettransformedcopy
hi,
i am facing problem in transformation .i tried with odreadex example.i want to transform entities before extracting data for each entity.initially i tried using transformby.but suppose a block is transformed 8 times in a file then it is displayed only once using transformby.
i think i need to open entity in write mode for transformby so its data is changed after transformation.then i tried with gettransformedcopy.
but it gives null id when control goes to dbdumper::dumpentity function.i am using following code.
void dbdumper::dumpblocks(oddbdatabase* pdb, std(ostream) & os)
{.............
...................
for (; !pentiter->done(); pentiter->step())// for each entity in the block
{
oddbobjectidarray blockrefids;
pblock->getblockreferenceids(blockrefids, true, false);
oddbblockreferenceptr pblkref ;
oduint16 temp,intcount=0;
temp= blockrefids.size();
if (intcount < blockrefids.size()){
for ( intcount = 0; intcount < blockrefids.size(); ++intcount){
if (!blockrefids[intcount].isnull()){
pblkref=blockrefids[intcount].safeopenobject();
odgematrix3d transmat=pblkref->blocktransform();
oddbentityptr pent;
pent=pentiter->objectid().safeopenobject(oddb::kforwrite);
odresult res ;
oddbentityptr pcopy;
//res=pent->transformby(transmat);
res=pent->gettransformedcopy(transmat,pcopy);
dumpentity(pcopy->objectid(),os);
//dumpentity(pent->objectid(), os);
}
}
}
else
dumpentity(pentiter->objectid(), os);
}
}
please help.
thanks
singhn
gettransformedcopy() returns pointer to newly created non-database-resident entity. so its id is null.
btw, gettransformedcopy() may fail because not all entities can be transformed by any matrix. for example by non-uniscale matrix.
sergey slezkin