* provided "as is" without express or implied warranty. *
**************************************************************************/
+/* $Id$ */
-#include "AliTrackReference.h"
+#include "TVirtualMC.h"
#include "TParticle.h"
-#include "AliRun.h"
+
+#include "AliTrackReference.h"
+#include <Riostream.h>
+
+//
+// Track Reference object is created every time particle is
+// crossing detector bounds. The object is created by Step Manager
+//
+// The class stores the following informations:
+// track label,
+// track position: X,Y,X
+// track momentum px, py, pz
+// track length and time of fligth: both in cm
+// status bits from Monte Carlo
+//
+
ClassImp(AliTrackReference)
-AliTrackReference::AliTrackReference()
+//_______________________________________________________________________
+ AliTrackReference::AliTrackReference():
+ TObject(),
+ fTrack(0),
+ fX(0),
+ fY(0),
+ fZ(0),
+ fPx(0),
+ fPy(0),
+ fPz(0),
+ fLength(0),
+ fTime(0),
+ fUserId(0),
+ fDetectorId(-999)
{
//
// Default constructor
+ // Creates empty object
+
+ for(Int_t i=0; i<16; i++) ResetBit(BIT(i));
+}
+
+AliTrackReference::AliTrackReference(const AliTrackReference &tr) :
+ TObject(),
+ fTrack(tr.fTrack),
+ fX(tr.fX),
+ fY(tr.fY),
+ fZ(tr.fZ),
+ fPx(tr.fPx),
+ fPy(tr.fPy),
+ fPz(tr.fPz),
+ fLength(tr.fLength),
+ fTime(tr.fTime),
+ fUserId(tr.fUserId),
+ fDetectorId(tr.fDetectorId)
+{
+ // Copy Constructor
+}
+
+//_______________________________________________________________________
+AliTrackReference::AliTrackReference(Int_t label, Int_t id) :
+ TObject(),
+ fTrack(label),
+ fX(0),
+ fY(0),
+ fZ(0),
+ fPx(0),
+ fPy(0),
+ fPz(0),
+ fLength(gMC->TrackLength()),
+ fTime(gMC->TrackTime()),
+ fUserId(0),
+ fDetectorId(id)
+{
+ //
+ // Create Reference object out of label and
+ // data in TVirtualMC object
+ //
+ // Creates an object and fill all parameters
+ // from data in VirtualMC
+ //
+ // Sylwester Radomski, (S.Radomski@gsi.de)
+ // GSI, Jan 31, 2003
//
- fTrack = fX = fY = fZ = fPx = fPy = fPz = fLength = 0;
+
+ Double_t vec[4];
+
+ gMC->TrackPosition(vec[0],vec[1],vec[2]);
+
+ fX = vec[0];
+ fY = vec[1];
+ fZ = vec[2];
+
+ gMC->TrackMomentum(vec[0],vec[1],vec[2],vec[3]);
+
+ fPx = vec[0];
+ fPy = vec[1];
+ fPz = vec[2];
+
+ // Set Up status code
+ // Copy Bits from virtual MC
+
+ for(Int_t i=0; i<16; i++) ResetBit(BIT(i));
+
+ SetBit(BIT(0), gMC->IsNewTrack());
+ SetBit(BIT(1), gMC->IsTrackAlive());
+ SetBit(BIT(2), gMC->IsTrackDisappeared());
+ SetBit(BIT(3), gMC->IsTrackEntering());
+ SetBit(BIT(4), gMC->IsTrackExiting());
+ SetBit(BIT(5), gMC->IsTrackInside());
+ SetBit(BIT(6), gMC->IsTrackOut());
+ SetBit(BIT(7), gMC->IsTrackStop());
+ //
+ // This particle has to be kept
+
+}
+/*
+AliExternalTrackParam * AliTrackReference::MakeTrack(const AliTrackReference *ref, Double_t mass)
+{
+ //
+ // Make dummy track from the track reference
+ // negative mass means opposite charge
+ //
+ Double_t xx[5];
+ Double_t cc[15];
+ for (Int_t i=0;i<15;i++) cc[i]=0;
+ Double_t x = ref->X(), y = ref->Y(), z = ref->Z();
+ Double_t alpha = TMath::ATan2(y,x);
+ Double_t xr = TMath::Sqrt(x*x+y*y);
+ xx[0] = ref->LocalY();
+ xx[1] = z;
+ xx[3] = ref->Pz()/ref->Pt();
+ xx[4] = 1./ref->Pt();
+ if (mass<0) xx[4]*=-1.; // negative mass - negative direction
+ Double_t alphap = TMath::ATan2(ref->Py(),ref->Px())-alpha;
+ if (alphap> TMath::Pi()) alphap-=TMath::Pi();
+ if (alphap<-TMath::Pi()) alphap+=TMath::Pi();
+ xx[2] = TMath::Sin(alphap);
+
+ AliExternalTrackParam * track = new AliExternalTrackParam(xr,alpha,xx,cc);
+ return track;
}
+*/
+//_______________________________________________________________________
+void
+AliTrackReference::Print(Option_t* /*opt*/) const
+{
+ cout << Form("Label %d P=%7.2f (X,Y,Z)=(%7.2f,%7.2f,%7.2f) (PX,PY,PZ)=(%7.2f,%7.2f,%7.2f)"
+ " Length=%7.2f Time=%7.2f UserId=%d",
+ Label(),P(),Px(),Py(),Pz(),X(),Y(),Z(),GetLength(),GetTime()) << endl;
+}
+