// Origin: Elisabetta Crescio //
// e-mail: crescio@to.infn.it //
// it is a V2 track with a possible number //
-// of cluster equal to fgkMaxNumberOfClusters //
+// of cluster equal to kMaxNumberOfClusters //
////////////////////////////////////////////////////
#include "AliITSgeomTGeo.h"
SetNumberOfClusters(0);
SetNumberOfClustersSA(0);
ResetIndexSA();
- for(Int_t nlay=0;nlay<fgkLayers;nlay++){
+ for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
SetNumberOfMarked(nlay,0);
}
ResetMarked();
// Copy a V2 track into a SA track
SetNumberOfClustersSA(0);
ResetIndexSA();
- for(Int_t nlay=0;nlay<fgkLayers;nlay++){
+ for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
SetNumberOfMarked(nlay,0);
}
ResetMarked();
ResetMarked();
Int_t number = t.GetNumberOfClustersSA();
SetNumberOfClustersSA(number);
- for(Int_t nlay=0;nlay<fgkLayers;nlay++){
+ for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
SetNumberOfMarked(nlay,t.GetNumberOfMarked(nlay));
}
for(Int_t i=0;i<number;i++){
fSain[i]=t.fSain[i];
}
- for(Int_t nlay=0;nlay<fgkLayers;nlay++){
+ for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
for(Int_t i=0;i<t.GetNumberOfMarked(nlay);i++){
fCluMark[nlay][i]=t.fCluMark[nlay][i];
}
// get the azimuthal angle of the detector containing the innermost
// cluster of this track (data member fAlpha)
- Double_t rotmatr[9];
- AliITSgeomTGeo::GetRotation(layer,ladder,detector,rotmatr);
- Double_t sAlpha=TMath::ATan2(rotmatr[1],rotmatr[0])+TMath::Pi();
- sAlpha+=TMath::Pi()/2.;
- if(layer==1) sAlpha+=TMath::Pi();
+ TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(layer,ladder,detector,m);
+ const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(layer,ladder,detector);
+ m.Multiply(tm);
+ Double_t txyz[3]={0.}, xyz[3]={0.};
+ m.LocalToMaster(txyz,xyz);
+ Double_t sAlpha=TMath::ATan2(xyz[1],xyz[0]);
- // get the radius of this detector. Procedure taken from the
- // AliITStrackerV2 constructor
- Float_t x=0,y=0,z=0;
- Double_t xyz[3];
- AliITSgeomTGeo::GetTranslation(layer,ladder,detector,xyz);
- x=xyz[0];
- y=xyz[1];
- z=xyz[2];
+ if (sAlpha<0) sAlpha+=TMath::TwoPi();
+ else if (sAlpha>=TMath::TwoPi()) sAlpha-=TMath::TwoPi();
- Double_t fi=TMath::ATan2(rotmatr[1],rotmatr[0])+TMath::Pi();
- fi+=TMath::Pi()/2;
- if (layer==1) fi+=TMath::Pi();
- Double_t cp=TMath::Cos(fi), sp=TMath::Sin(fi);
- Double_t sX=x*cp+y*sp;
+ Double_t sX=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
+ Init(sAlpha,sX,Ycoor,Zcoor,phi,tanlambda,curv,lab);
+
+}
+//____________________________________________________
+AliITStrackSA::AliITStrackSA(Double_t alpha, Double_t radius, Double_t Ycoor, Double_t Zcoor, Double_t phi, Double_t tanlambda, Double_t curv, Int_t lab ):
+fNSA(0)
+{
+ // standard constructor. Used for ITS standalone tracking
+
+ // get the azimuthal angle of the detector containing the innermost
+ // cluster of this track (data member fAlpha)
+
+ if (alpha<0) alpha+=TMath::TwoPi();
+ else if (alpha>=TMath::TwoPi()) alpha-=TMath::TwoPi();
+ Init(alpha,radius,Ycoor,Zcoor,phi,tanlambda,curv,lab);
+}
+//____________________________________________________
+ void AliITStrackSA::Init(Double_t alpha, Double_t radius, Double_t Ycoor, Double_t Zcoor, Double_t phi, Double_t tanlambda, Double_t curv, Int_t lab ){
+ // initialize parameters
fdEdx = 0;
Double_t sP[] = {Ycoor,
Zcoor,
- TMath::Sin(phi-sAlpha),
+ TMath::Sin(phi-alpha),
tanlambda,
curv/conv};
- Set(sX,sAlpha,sP,sC);
- for(Int_t i=0; i<kMaxLayer; i++) fIndex[i] = 0; // to be set explicitely
+ // dealing with the case B=0 (taken from AliTPCtrack.cxx)
+ Double_t mostProbablePt=AliExternalTrackParam::GetMostProbablePt();
+ Double_t p0=TMath::Sign(1/mostProbablePt,sP[4]);
+ Double_t w0=sC[14]/(sC[14] + p0*p0), w1=p0*p0/(sC[14] + p0*p0);
+ sP[4] = w0*p0 + w1*sP[4];
+ sC[14]*=w1;
+
+ Set(radius,alpha,sP,sC);
+
+ for(Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fIndex[i] = 0; // to be set explicitely
for(Int_t i=0; i<4; i++) fdEdxSample[i] = 0;
SetNumberOfClusters(0);
SetNumberOfClustersSA(0);
- for(Int_t nlay=0;nlay<fgkLayers;nlay++) SetNumberOfMarked(nlay,0);
+ for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++) SetNumberOfMarked(nlay,0);
ResetIndexSA();
ResetMarked();
SetChi2(0);
//____________________________________________________________
void AliITStrackSA::AddClusterSA(Int_t layer, Int_t clnumb) {
- // add one clusters to the list (maximum number=fgkMaxNumberOfClusters)
+ // add one clusters to the list (maximum number=kMaxNumberOfClusters)
Int_t presnum = GetNumberOfClustersSA();
- if(presnum>=fgkMaxNumberOfClusters){
+ if(presnum>=kMaxNumberOfClusters){
Warning("AddClusterSA","Maximum number of clusters already reached. Nothing is done\n");
return;
}
//____________________________________________________________
void AliITStrackSA::AddClusterMark(Int_t layer, Int_t clnumb) {
- // add one clusters to the list (maximum number=fgkMaxNumberOfClusters)
+ // add one clusters to the list (maximum number=kMaxNumberOfClusters)
Int_t presnum = GetNumberOfMarked(layer);
// printf("presnum=%d\n",presnum);
- if(presnum>=fgkMaxNumberOfClustersL){
+ if(presnum>=kMaxNumberOfClustersL){
Warning("AddClusterMark","Maximum number of clusters already reached. Nothing is done\n");
return;
}
void AliITStrackSA::AddClusterV2(Int_t layer,Int_t clnumb) {
// add one clusters to the list (maximum number=6)
Int_t presnum = GetNumberOfClusters();
- if(presnum>=kMaxLayer){
+ if(presnum>=AliITSgeomTGeo::GetNLayers()){
Warning("AddClusterV2","Maximum number of clusters already reached. Nothing is done\n");
return;
}
void AliITStrackSA::ResetMarked(){
//Reset array of marked clusters
- for(Int_t nlay=0;nlay<fgkLayers;nlay++){
- for(Int_t k=0; k<fgkMaxNumberOfClustersL; k++) fCluMark[nlay][k]=0;
+ for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
+ for(Int_t k=0; k<kMaxNumberOfClustersL; k++) fCluMark[nlay][k]=0;
}
}
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git://git.uio.no / u / mrichter / AliRoot.git / blobdiff