1 /**************************************************************************
2 * Copyright(c) 1998-2003, 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 **************************************************************************/
18 ////////////////////////////////////////////////////
19 // Stand alone track class //
20 // Origin: Elisabetta Crescio //
21 // e-mail: crescio@to.infn.it //
22 // it is a V2 track with a possible number //
23 // of cluster equal to fgkMaxNumberOfClusters //
24 ////////////////////////////////////////////////////
26 #include "AliITSgeom.h"
27 #include "AliITStrackSA.h"
30 ClassImp(AliITStrackSA)
32 //_____________________________________
33 AliITStrackSA:: AliITStrackSA() : AliITStrackMI(),
36 // Default constructor
37 SetNumberOfClusters(0);
38 SetNumberOfClustersSA(0);
40 for(Int_t nlay=0;nlay<fgkLayers;nlay++){
41 SetNumberOfMarked(nlay,0);
47 //___________________________________________________
48 AliITStrackSA::AliITStrackSA(const AliITStrackMI& t) :
51 // Copy a V2 track into a SA track
52 SetNumberOfClustersSA(0);
54 for(Int_t nlay=0;nlay<fgkLayers;nlay++){
55 SetNumberOfMarked(nlay,0);
60 //___________________________________________________
61 AliITStrackSA::AliITStrackSA(const AliITStrackSA& t) :
69 Int_t number = t.GetNumberOfClustersSA();
70 SetNumberOfClustersSA(number);
71 for(Int_t nlay=0;nlay<fgkLayers;nlay++){
72 SetNumberOfMarked(nlay,t.GetNumberOfMarked(nlay));
74 for(Int_t i=0;i<number;i++){
77 for(Int_t nlay=0;nlay<fgkLayers;nlay++){
78 for(Int_t i=0;i<t.GetNumberOfMarked(nlay);i++){
79 fCluMark[nlay][i]=t.fCluMark[nlay][i];
83 //____________________________________________________
84 AliITStrackSA::AliITStrackSA(AliITSgeom* geom,Int_t layer, Int_t ladder, Int_t detector, Double_t Ycoor, Double_t Zcoor, Double_t phi, Double_t tanlambda, Double_t curv, Int_t lab ):
87 // standard constructor. Used for ITS standalone tracking
90 Fatal("AliITStrackSA","ITS geometry not found - Abort\n");
93 // get the azimuthal angle of the detector containing the innermost
94 // cluster of this track (data member fAlpha)
96 geom->GetRotMatrix(layer,ladder,detector,rotmatr);
97 Double_t sAlpha=TMath::ATan2(rotmatr[1],rotmatr[0])+TMath::Pi();
98 sAlpha+=TMath::Pi()/2.;
99 if(layer==1) sAlpha+=TMath::Pi();
102 // get the radius of this detector. Procedure taken from the
103 // AliITStrackerV2 constructor
105 geom->GetTrans(layer,ladder,detector,x,y,z);
107 Double_t fi=TMath::ATan2(rotmatr[1],rotmatr[0])+TMath::Pi();
109 if (layer==1) fi+=TMath::Pi();
110 Double_t cp=TMath::Cos(fi), sp=TMath::Sin(fi);
111 Double_t sX=x*cp+y*sp;
116 Double_t conv=GetBz()*kB2C;
117 Double_t sC[] = {0.000009, // 0.000009
131 0.000001/(conv*conv)}; //0.0000001
133 Double_t sP[] = {Ycoor,
135 TMath::Sin(phi-sAlpha),
139 Set(sX,sAlpha,sP,sC);
141 for(Int_t i=0; i<kMaxLayer; i++) fIndex[i] = 0; // to be set explicitely
143 for(Int_t i=0; i<4; i++) fdEdxSample[i] = 0;
145 SetNumberOfClusters(0);
146 SetNumberOfClustersSA(0);
147 for(Int_t nlay=0;nlay<fgkLayers;nlay++) SetNumberOfMarked(nlay,0);
151 SetMass(0.139); // pion mass
156 //____________________________________________________________
157 void AliITStrackSA::AddClusterSA(Int_t layer, Int_t clnumb) {
158 // add one clusters to the list (maximum number=fgkMaxNumberOfClusters)
159 Int_t presnum = GetNumberOfClustersSA();
160 if(presnum>=fgkMaxNumberOfClusters){
161 Warning("AddClusterSA","Maximum number of clusters already reached. Nothing is done\n");
165 fSain[presnum] = (layer<<28)+clnumb;
167 SetNumberOfClustersSA(presnum);
170 //____________________________________________________________
171 void AliITStrackSA::AddClusterMark(Int_t layer, Int_t clnumb) {
172 // add one clusters to the list (maximum number=fgkMaxNumberOfClusters)
173 Int_t presnum = GetNumberOfMarked(layer);
174 // printf("presnum=%d\n",presnum);
175 if(presnum>=fgkMaxNumberOfClustersL){
176 Warning("AddClusterMark","Maximum number of clusters already reached. Nothing is done\n");
180 fCluMark[layer][presnum] = clnumb;
182 SetNumberOfMarked(layer,presnum);
185 //____________________________________________________________
186 void AliITStrackSA::AddClusterV2(Int_t layer,Int_t clnumb) {
187 // add one clusters to the list (maximum number=6)
188 Int_t presnum = GetNumberOfClusters();
189 if(presnum>=kMaxLayer){
190 Warning("AddClusterV2","Maximum number of clusters already reached. Nothing is done\n");
194 fIndex[presnum] = (layer<<28)+clnumb;
196 SetNumberOfClusters(presnum);
199 //_____________________________________________________________
200 void AliITStrackSA::ResetMarked(){
202 //Reset array of marked clusters
203 for(Int_t nlay=0;nlay<fgkLayers;nlay++){
204 for(Int_t k=0; k<fgkMaxNumberOfClustersL; k++) fCluMark[nlay][k]=0;