Hi,
I've got the following problem:
I've a class deriving from TVector3 that I want to store in a TTree.
The class is stored and I can retrieve it.
This is just fine.
However, for fast analysis with TTRee::Draw(), I would like to have Pt,
eta and phi in my TTree.
The solution I've found is to add those variables in my class, and let
them be streamed as usual.
The problem arises when I want to update those fields.
I can't do it after each action during the object life, so I wanted to
update them just before streaming the object.
I've modified the streamer like this:
void HLGlobalTriggerCandidate::Streamer(TBuffer &R__b)
{
// Stream an object of class HLGlobalTriggerCandidate.
if (R__b.IsReading()) {
HLGlobalTriggerCandidate::Class()->ReadBuffer(R__b, this);
} else {
et = Pt();
eta = Eta();
phi = Phi();
HLGlobalTriggerCandidate::Class()->WriteBuffer(R__b, this);
}
}
... but it doesn't work.
et, eta and phi are not stored with the right value.
Can anybody tell me what's wrong ?
Cheers,
Christophe.
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