- Three classes by MinJung Kweon AliHFEpriVtx, AliHFEsecVtx and AliHFEmcQA for primar...

[u/mrichter/AliRoot.git] / STEER / AliTrackReference.cxx

diff --git a/STEER/AliTrackReference.cxx b/STEER/AliTrackReference.cxx
index 2c209bece661160f37d35b7c72fd4ed050b12e8c..1cd15009d86b1f1d64da0508e7fbbaebc57c02d8 100644 (file)
--- a/STEER/AliTrackReference.cxx
+++ b/STEER/AliTrackReference.cxx
@@ -13,20 +13,32 @@
  * provided "as is" without express or implied warranty.                  *
  **************************************************************************/
 
-/* $Header$ */
+/* $Id$ */
 
-//----------------------------------------------------------------------
-//  Class containing the kinematic information of tracks at various
-//  points in the simulation to check the reconstruction
-//  Origin: M.Ivanov
-//----------------------------------------------------------------------
+#include "TVirtualMC.h"
+#include "TParticle.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():
+   TObject(),
    fTrack(0),
    fX(0),
    fY(0),
@@ -34,9 +46,125 @@ ClassImp(AliTrackReference)
    fPx(0),
    fPy(0),
    fPz(0),
-   fLength(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
+  //
+    
+  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 (PX,PY,PZ)=(%7.2f,%7.2f,%7.2f) (X,Y,Z)=(%7.2f,%7.2f,%7.2f)"
+               " Length=%7.2f Time=%7.2f UserId=%d",
+              Label(),P(),Px(),Py(),Pz(),X(),Y(),Z(),GetLength(),GetTime(),UserId()) << endl;
+}
+