Hi Tommaso,
If you declare
vector<Track> ve; // a vector of Track objects
then you should fill with
ve.push_back(*tr); and not (tr)
if you declare
vector<Track*> ve; // a vector of Track pointers
you should fill with
ve.push_back(tr);
Note that in your particular example, you use a slow procedure.
Using a TClonesArray of Tracks will be about 3 times faster in I/O.
Rene Brun
Tommaso Chiarusi wrote:
>
> Dear Rooters,
>
> I have problems as I try to build STL vector containing objects
> which are related to a compile Classes (libMyClass.so).
>
> When I was using the not-compiled class, i.e. the include files,
> it worked good!!!!!
>
> I explain myself better:
> I have my own class Track.h .
>
> I want to build a STL vector of Track objects,
> so I can do:
>
> #include <vector>
> #include "Track.h" // as header of the ROOT macro
> ...
> vector<Track> ve;
> Track *tr=new Track(0.2,23.2);
> ve.push_back(tr);
>
> THIS PROCEDURE WORKS GOOD!
>
> But now I need to retrieve tracks stored in a Tree, so I'm forced to use
> the compiled class library: I have produced the libTrack.so.
> Then, omitting the #include "Track.h" , I do:
>
> if(!TClassTable::GetDict("Track")){
> gSystem->Load("mylib/libTrack.so");
> }
>
> vector<Track> ve;
>
> I make the usual opening of the Tree and addressing of the Track objects
>
> TTree *myTree = (TTree*)file_root->Get("t1");
> TBranch *myBranch = myTree->GetBranch("tracks");
>
> Track *tr = new Track();
> myBranch->SetAddress(&tr);
>
> and get the entries one by one looping over the
>
> Int_t nevent = myTree->GetEntries();
>
> so:
> for(Int_t i=0;i<nevent;i++){
> myBranch->GetEntry(i); // get the track
> ve.push_back(tr);
> }
>
> THIS FAILS!!!!!
>
> What can it be?
> Is it something related to some Errors in compiling my class?
>
> sorry if I disturb you again with a new problem.
>
> Thanks and Cheers!
>
> Tommaso
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