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Re: WirepointHitPolicy detplane implementation [message #8091 is a reply to message #8089] Mon, 16 March 2009 18:31 Go to previous messageGo to previous message
Lia Lavezzi
Messages: 291
Registered: May 2007
Location: Torino
first-grade participant

From: *pv.infn.it
Hi,

basically the differences are:

1) the fact that in PndSttRecoHit we make a check on the distance of the poca from the wire:

Double_t distance;
distance =
TMath::Sqrt(fabs(((wire1-vpf).Mag2()*(wire2-wire1).Mag2()-pow((wire1-vpf).Dot(w$
// check vpf inside tube
if(distance>0.5) {
  cout << "vpf outside the firing tube" << endl;
  FitterException exc("distance vpf-wire > 0.5", __LINE__,__FILE__);
  throw exc;
}


while the PndDchRecoHit does not need it;

2) in PndSttRecoHit the origin of the detector plane is set in the center of the tube:
TVector3 O = (wire1 + wire2) * 0.5;
while in PndDchRecoHit it is in the point of closest approach on the wire:
TVector3 O = vwi;

Please Ola correct me if I missed something.
Ciao,
Lia.

 
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