1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
16 //-------------------------------------------------------------------------
17 // Implementation of the AliTracker class
19 // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
20 //-------------------------------------------------------------------------
23 #include "AliTracker.h"
24 #include "AliCluster.h"
25 #include "AliKalmanTrack.h"
29 Double_t AliTracker::fX;
30 Double_t AliTracker::fY;
31 Double_t AliTracker::fZ;
33 //__________________________________________________________________________
34 void AliTracker::CookLabel(AliKalmanTrack *t, Float_t wrong) const {
35 //--------------------------------------------------------------------
36 //This function "cooks" a track label. If label<0, this track is fake.
37 //--------------------------------------------------------------------
38 Int_t noc=t->GetNumberOfClusters();
39 Int_t *lb=new Int_t[noc];
40 Int_t *mx=new Int_t[noc];
41 AliCluster **clusters=new AliCluster*[noc];
44 for (i=0; i<noc; i++) {
46 Int_t index=t->GetClusterIndex(i);
47 clusters[i]=GetCluster(index);
51 for (i=0; i<noc; i++) {
52 AliCluster *c=clusters[i];
53 lab=TMath::Abs(c->GetLabel(0));
55 for (j=0; j<noc; j++) if (lb[j]==lab || mx[j]==0) break;
61 for (i=0; i<noc; i++) if (mx[i]>max) {max=mx[i]; lab=lb[i];}
63 for (i=0; i<noc; i++) {
64 AliCluster *c=clusters[i];
65 if (TMath::Abs(c->GetLabel(1)) == lab ||
66 TMath::Abs(c->GetLabel(2)) == lab ) max++;
69 if ((1.- Float_t(max)/noc) > wrong) lab=-lab;
77 //____________________________________________________________________________
78 void AliTracker::UseClusters(const AliKalmanTrack *t, Int_t from) const {
79 //------------------------------------------------------------------
80 //This function marks clusters associated with the track.
81 //------------------------------------------------------------------
82 Int_t noc=t->GetNumberOfClusters();
83 for (Int_t i=from; i<noc; i++) {
84 Int_t index=t->GetClusterIndex(i);
85 AliCluster *c=GetCluster(index);