* about the suitability of this software for any purpose. It is *
* provided "as is" without express or implied warranty. *
**************************************************************************/
-//
-// Base Class used to find
-// the reconstructed points for ITS
-// See also AliITSClusterFinderSPD, AliITSClusterFinderSDD,
-// AliITSClusterFinderSDD
-//
+////////////////////////////////////////////////////////////////////////////
+// //
+// Base Class used to find //
+// the reconstructed points for ITS //
+// See also AliITSClusterFinderSPD, AliITSClusterFinderSDD, //
+// AliITSClusterFinderSDD AliITSClusterFinderV2 //
+////////////////////////////////////////////////////////////////////////////
+
+#include "AliRun.h"
#include "AliITSClusterFinder.h"
+#include "AliITSRecPoint.h"
#include "AliITSdigit.h"
-#include "AliRun.h"
-#include "AliITS.h"
+#include "AliITSDetTypeRec.h"
+#include "AliITSMap.h"
+#include "AliITSgeomTGeo.h"
+#include <TParticle.h>
+#include "AliMC.h"
ClassImp(AliITSClusterFinder)
+extern AliRun *gAlice;
+
//----------------------------------------------------------------------
-AliITSClusterFinder::AliITSClusterFinder(){
+AliITSClusterFinder::AliITSClusterFinder():
+TObject(),
+fDebug(0),
+fModule(0),
+fDigits(0),
+fNdigits(0),
+fDetTypeRec(0),
+fClusters(0),
+fNRawClusters(0),
+fMap(0),
+fNperMax(0),
+fDeclusterFlag(0),
+fClusterSize(0),
+fNPeaks(-1),
+fNModules(AliITSgeomTGeo::GetNModules()),
+fEvent(0){
// default cluster finder
-
- fSegmentation = 0;
- fResponse = 0;
- fMap = 0;
- fDigits = 0;
- fNdigits = 0;
- fNRawClusters = 0;
- fNperMax = 0;
- fDeclusterFlag= 0;
- fClusterSize = 0;
- fNPeaks = 0;
+ // Input:
+ // none.
+ // Output:
+ // none.
+ // Return:
+ // A default constructed AliITSCulsterFinder
}
//----------------------------------------------------------------------
-AliITSClusterFinder::AliITSClusterFinder(AliITSsegmentation *seg,
- AliITSresponse *response,
- TClonesArray *digits){
- // cluster finder
- fSegmentation=seg;
- fResponse=response;
- fMap = 0;
-
- fDigits=digits;
- fNdigits = fDigits->GetEntriesFast();
+AliITSClusterFinder::AliITSClusterFinder(AliITSDetTypeRec* dettyp):
+TObject(),
+fDebug(0),
+fModule(0),
+fDigits(0),
+fNdigits(0),
+fDetTypeRec(dettyp),
+fClusters(0),
+fNRawClusters(0),
+fMap(0),
+fNperMax(0),
+fDeclusterFlag(0),
+fClusterSize(0),
+fNPeaks(-1),
+fNModules(AliITSgeomTGeo::GetNModules()),
+fEvent(0){
+ // default cluster finder
+ // Standard constructor for cluster finder
+ // Input:
+ // AliITSsegmentation *seg The segmentation class to be used
+ // AliITSresponse *res The response class to be used
+ // Output:
+ // none.
+ // Return:
+ // A Standard constructed AliITSCulsterFinder
- fNRawClusters=0;
+ SetNperMax();
+ SetClusterSize();
+ SetDeclusterFlag();
+}
+//----------------------------------------------------------------------
+AliITSClusterFinder::AliITSClusterFinder(AliITSDetTypeRec* dettyp,
+ TClonesArray *digits):
+TObject(),
+fDebug(0),
+fModule(0),
+fDigits(digits),
+fNdigits(0),
+fDetTypeRec(dettyp),
+fClusters(0),
+fNRawClusters(0),
+fMap(0),
+fNperMax(0),
+fDeclusterFlag(0),
+fClusterSize(0),
+fNPeaks(-1),
+fNModules(AliITSgeomTGeo::GetNModules()),
+fEvent(0){
+ // default cluster finder
+ // Standard + cluster finder constructor
+ // Input:
+ // AliITSsegmentation *seg The segmentation class to be used
+ // AliITSresponse *res The response class to be used
+ // TClonesArray *digits Array of digits to be used
+ // Output:
+ // none.
+ // Return:
+ // A Standard constructed AliITSCulsterFinder
+ fNdigits = fDigits->GetEntriesFast();
SetNperMax();
SetClusterSize();
SetDeclusterFlag();
+}
- fNPeaks=-1;
+//______________________________________________________________________
+AliITSClusterFinder::AliITSClusterFinder(const AliITSClusterFinder &source) : TObject(source),
+fDebug(source.fDebug),
+fModule(source.fModule),
+fDigits(),
+fNdigits(source.fNdigits),
+fDetTypeRec(),
+fClusters(),
+fNRawClusters(source.fNRawClusters),
+fMap(),
+fNperMax(source.fNperMax),
+fDeclusterFlag(source.fDeclusterFlag),
+fClusterSize(source.fClusterSize),
+fNPeaks(source.fNPeaks),
+fNModules(source.fNModules),
+fEvent(source.fEvent) {
+ // Copy constructor
+ // Copies are not allowed. The method is protected to avoid misuse.
+ AliError("Copy constructor not allowed\n");
}
+
+
+//______________________________________________________________________
+//AliITSClusterFinder& AliITSClusterFinder::operator=(const AliITSClusterFinder& /* source */){
+ // Assignment operator
+ // Assignment is not allowed. The method is protected to avoid misuse.
+// Fatal("= operator","Assignment operator not allowed\n");
+// return *this;
+//}
+
//----------------------------------------------------------------------
AliITSClusterFinder::~AliITSClusterFinder(){
// destructor cluster finder
+ // Input:
+ // none.
+ // Output:
+ // none.
+ // Return:
+ // none.
+ if(fMap) {delete fMap;}
// Zero local pointers. Other classes own these pointers.
- fSegmentation = 0;
- fResponse = 0;
fMap = 0;
fDigits = 0;
fNdigits = 0;
fDeclusterFlag= 0;
fClusterSize = 0;
fNPeaks = 0;
+ fDetTypeRec = 0;
+
}
//__________________________________________________________________________
-AliITSClusterFinder::AliITSClusterFinder(const AliITSClusterFinder &source){
- // Copy Constructor
- if(&source == this) return;
- this->fDigits = source.fDigits;
- this->fNdigits = source.fNdigits;
- this->fResponse = source.fResponse;
- this->fSegmentation = source.fSegmentation;
- this->fNRawClusters = source.fNRawClusters;
- this->fMap = source.fMap;
- this->fNperMax = source.fNperMax;
- this->fDeclusterFlag = source.fDeclusterFlag;
- this->fClusterSize = source.fClusterSize;
- this->fNPeaks = source.fNPeaks;
- return;
-}
-//______________________________________________________________________
-AliITSClusterFinder& AliITSClusterFinder::operator=(const AliITSClusterFinder &source) {
- // Assignment operator
-
- if(&source == this) return *this;
- this->fDigits = source.fDigits;
- this->fNdigits = source.fNdigits;
- this->fResponse = source.fResponse;
- this->fSegmentation = source.fSegmentation;
- this->fNRawClusters = source.fNRawClusters;
- this->fMap = source.fMap;
- this->fNperMax = source.fNperMax;
- this->fDeclusterFlag = source.fDeclusterFlag;
- this->fClusterSize = source.fClusterSize;
- this->fNPeaks = source.fNPeaks;
- return *this;
+void AliITSClusterFinder::InitGeometry(){
+ //
+ // Initialisation of ITS geometry
+ //
+ Int_t mmax=AliITSgeomTGeo::GetNModules();
+ for (Int_t m=0; m<mmax; m++) {
+ Int_t lay,lad,det; AliITSgeomTGeo::GetModuleId(m,lay,lad,det);
+ fNdet[m] = (lad-1)*AliITSgeomTGeo::GetNDetectors(lay) + (det-1);
+ fNlayer[m] = lay-1;
+ }
}
+
+
+
//----------------------------------------------------------------------
void AliITSClusterFinder::AddCluster(Int_t branch, AliITSRawCluster *c){
// Add a raw cluster copy to the list
+ // Input:
+ // Int_t branch The branch to which the cluster is to be added to
+ // AliITSRawCluster *c The cluster to be added to the array of clusters
+ // Output:
+ // none.
+ // Return:
+ // none.
- AliITS *iTS=(AliITS*)gAlice->GetModule("ITS");
- iTS->AddCluster(branch,c);
- fNRawClusters++;
+ if(!fDetTypeRec) {
+ Error("AddCluster","fDetTypeRec is null!");
+ return;
+ }
+ fDetTypeRec->AddCluster(branch,c);
+ fNRawClusters++;
}
//----------------------------------------------------------------------
void AliITSClusterFinder::AddCluster(Int_t branch, AliITSRawCluster *c,
AliITSRecPoint &rp){
- // Add a raw cluster copy to the list
+ // Add a raw cluster copy to the list and the RecPoint
+ // Input:
+ // Int_t branch The branch to which the cluster is to be added to
+ // AliITSRawCluster *c The cluster to be added to the array of clusters
+ // AliITSRecPoint &rp The RecPoint to be added to the array of RecPoints
+ // Output:
+ // none.
+ // Return:
+ // none.
+ if(!fDetTypeRec) {
+ Error("AddCluster","fDetTypeRec is null!");
+ return;
+ }
+
+ fDetTypeRec->AddCluster(branch,c);
+ fNRawClusters++;
+ fDetTypeRec->AddRecPoint(rp);
- AliITS *iTS=(AliITS*)gAlice->GetModule("ITS");
- iTS->AddCluster(branch,c);
- fNRawClusters++;
- iTS->AddRecPoint(rp);
}
+/*
+//______________________________________________________________________
+void AliITSClusterFinder::CheckLabels(Int_t lab[3]) {
+ //------------------------------------------------------------
+ // Tries to find mother's labels
+ //------------------------------------------------------------
+
+ if(lab[0]<0 && lab[1]<0 && lab[2]<0) return; // In case of no labels just exit
+ // Check if simulation
+ AliMC* mc = gAlice->GetMCApp();
+ if(!mc)return;
+
+ Int_t ntracks = mc->GetNtrack();
+ for (Int_t i=0;i<3;i++){
+ Int_t label = lab[i];
+ if (label>=0 && label<ntracks) {
+ TParticle *part=(TParticle*)mc->Particle(label);
+ if (part->P() < 0.005) {
+ Int_t m=part->GetFirstMother();
+ if (m<0) {
+ continue;
+ }
+ if (part->GetStatusCode()>0) {
+ continue;
+ }
+ lab[i]=m;
+ }
+ }
+ }
+
+}
+*/
//______________________________________________________________________
void AliITSClusterFinder::FindRawClusters(Int_t module){
// Default Cluster finder.
Int_t i=0,nc=0,j[4],k,k2=0;
// Copy all digits for this module into a local TObjArray.
- for(i=0;i<ndigits;i++) digs->AddAt(new AliITSdigit(*((AliITSdigit*)(fDigits->At(i)))),i);
+ for(i=0;i<ndigits;i++) digs->AddAt(new AliITSdigit(*(GetDigit(i))),i);
digs->Sort();
// First digit is a cluster.
i = 0;
clust0->AddAtFree(digs->At(i)); // move owner ship from digs to clusts
nc++;
for(i=1;i<ndigits;i++){
- if(IsNeighbor(digs,i,j)){
- dig = (AliITSdigit*)(digs->At(j[0]));
- // Add to existing cluster. Find which cluster this digis
- for(k=0;k<nc;k++){
- clust0 = ((TObjArray*)(clusts->At(k)));
- if(clust0->IndexOf(dig)>=0) break;
- } // end for k
- if(k>=nc){
- Fatal("FindRawClusters","Digit not found as expected");
- } // end if
- if(j[1]>=0){
- dig = (AliITSdigit*)(digs->At(j[1]));
- // Add to existing cluster. Find which cluster this digis
- for(k2=0;k2<nc;k2++){
- clust1 = ((TObjArray*)(clusts->At(k2)));
- if(clust1->IndexOf(dig)>=0) break;
- } // end for k2
- if(k2>=nc){
- Fatal("FindRawClusters","Digit not found as expected");
- } // end if
- } // end if j[1]>=0
- // Found cluster with neighboring digits add this one to it.
- if(clust0==clust1){ // same cluster
- clust0->AddAtFree(digs->At(i));
- clust0 = 0; // finished with cluster. zero for safty
- clust1 = 0; // finished wit hcluster. zero for safty
- }else{ // two different clusters which need to be merged.
- clust0->AddAtFree(digs->At(i)); // Add digit to this cluster.
- for(k=0;k<clust1->GetEntriesFast();k++){
- // move clust1 into clust0
- clust0->AddAtFree(clust1->At(k));//move digit to this cluster
- clust1->AddAt(0,k); // zero this one
- } // end for k
- delete clust1;
- clusts->AddAt(0,k2); // zero array of clusters element clust1
- clust0 = 0; // finished with cluster. zero for safty
- clust1 = 0; // finished wit hcluster. zero for safty
- } // end if clust0==clust1
- }else{// New cluster
- clusts->AddAt(new TObjArray(kelms),nc);
- clust0 = ((TObjArray*)(clusts->At(nc)));
- clust0->AddAtFree(digs->At(i));// move owner ship from digs to clusts
- clust0 = 0; // finished with cluster. zero for safty
- nc++;
- } // End if IsNeighbor
+ if(IsNeighbor(digs,i,j)){
+ dig = (AliITSdigit*)(digs->At(j[0]));
+ // Add to existing cluster. Find which cluster this digis
+ for(k=0;k<nc;k++){
+ clust0 = ((TObjArray*)(clusts->At(k)));
+ if(clust0->IndexOf(dig)>=0) break;
+ } // end for k
+ if(k>=nc){
+ Fatal("FindRawClusters","Digit not found as expected");
+ } // end if
+ if(j[1]>=0){
+ dig = (AliITSdigit*)(digs->At(j[1]));
+ // Add to existing cluster. Find which cluster this digis
+ for(k2=0;k2<nc;k2++){
+ clust1 = ((TObjArray*)(clusts->At(k2)));
+ if(clust1->IndexOf(dig)>=0) break;
+ } // end for k2
+ if(k2>=nc){
+ Fatal("FindRawClusters","Digit not found as expected");
+ } // end if
+ } // end if j[1]>=0
+ // Found cluster with neighboring digits add this one to it.
+ if(clust0==clust1){ // same cluster
+ clust0->AddAtFree(digs->At(i));
+ clust0 = 0; // finished with cluster. zero for safty
+ clust1 = 0; // finished wit hcluster. zero for safty
+ }else{ // two different clusters which need to be merged.
+ clust0->AddAtFree(digs->At(i)); // Add digit to this cluster.
+ for(k=0;k<clust1->GetEntriesFast();k++){
+ // move clust1 into clust0
+ //move digit to this cluster
+ clust0->AddAtFree(clust1->At(k));
+ clust1->AddAt(0,k); // zero this one
+ } // end for k
+ delete clust1;
+ clusts->AddAt(0,k2); // zero array of clusters element clust1
+ clust0 = 0; // finished with cluster. zero for safty
+ clust1 = 0; // finished wit hcluster. zero for safty
+ } // end if clust0==clust1
+ }else{// New cluster
+ clusts->AddAt(new TObjArray(kelms),nc);
+ clust0 = ((TObjArray*)(clusts->At(nc)));
+ // move owner ship from digs to clusts
+ clust0->AddAtFree(digs->At(i));
+ clust0 = 0; // finished with cluster. zero for safty
+ nc++;
+ } // End if IsNeighbor
} // end for i
// There are now nc clusters in clusts. Each element of clust is an
// array of digits which are clustered together.
// clean up at the end.
for(i=0;i<nc;i++){
- clust0 =(TObjArray*)(clusts->At(i));
- // Digits deleted below, so zero this TObjArray
- for(k=0;k<clust0->GetEntriesFast();k++) clust0->AddAt(0,k);
- delete clust0; // Delete this TObjArray
- clusts->AddAt(0,i); // Contents deleted above, so zero it.
+ clust0 =(TObjArray*)(clusts->At(i));
+ // Digits deleted below, so zero this TObjArray
+ for(k=0;k<clust0->GetEntriesFast();k++) clust0->AddAt(0,k);
+ delete clust0; // Delete this TObjArray
+ clusts->AddAt(0,i); // Contents deleted above, so zero it.
} // end for i
delete clusts; // Delete this TObjArray/
// Delete the digits then the TObjArray which containted them.
delete digs;
}
//______________________________________________________________________
-Bool_t AliITSClusterFinder::IsNeighbor(TObjArray *digs,Int_t i,Int_t n[]) const{
+Bool_t AliITSClusterFinder::IsNeighbor(TObjArray *digs,Int_t i,Int_t n[])const{
// Locagical function which checks to see if digit i has a neighbor.
// If so, then it returns kTRUE and its neighbor index j.
// This routine checks if the digits are side by side or one before the
ix = ((AliITSdigit*)(digs->At(i)))->GetCoord1();
iz = ((AliITSdigit*)(digs->At(i)))->GetCoord2();
for(j=0;j<i;j++){
- jx = ((AliITSdigit*)(digs->At(j)))->GetCoord1();
- jz = ((AliITSdigit*)(digs->At(j)))->GetCoord2();
- if(jx+1==ix && jz ==iz){n[0] = j;nei[0] = kTRUE;}
- if(jx ==ix && jz+1==iz){n[1] = j;nei[1] = kTRUE;}
- if(jx+1==ix && jz+1==iz){n[2] = j;nei[2] = kTRUE;}
- if(jx+1==ix && jz-1==iz){n[3] = j;nei[3] = kTRUE;}
+ jx = ((AliITSdigit*)(digs->At(j)))->GetCoord1();
+ jz = ((AliITSdigit*)(digs->At(j)))->GetCoord2();
+ if(jx+1==ix && jz ==iz){n[0] = j;nei[0] = kTRUE;}
+ if(jx ==ix && jz+1==iz){n[1] = j;nei[1] = kTRUE;}
+ if(jx+1==ix && jz+1==iz){n[2] = j;nei[2] = kTRUE;}
+ if(jx+1==ix && jz-1==iz){n[3] = j;nei[3] = kTRUE;}
} // end for k
if(nei[0]||nei[1]) return kTRUE;
if(kdiagonal&&(nei[2]||nei[3])) return kTRUE;
// no Neighbors found.
return kFALSE;
}
+
+//______________________________________________________________________
+void AliITSClusterFinder::Print(ostream *os) const{
+ //Standard output format for this class
+ // Inputs:
+ // ostream *os Output stream
+ // Output:
+ // ostream *os Output stream
+ // Return:
+ // none.
+
+ *os << fDebug<<",";
+ *os << fModule<<",";
+ *os << fNdigits<<",";
+ *os << fNRawClusters<<",";
+ *os << fNperMax<<",";
+ *os << fDeclusterFlag<<",";
+ *os << fClusterSize<<",";
+ *os << fNPeaks<<endl;
+}
+//______________________________________________________________________
+void AliITSClusterFinder::Read(istream *is) {
+ //Standard input for this class
+ // Inputs:
+ // istream *is Input stream
+ // Output:
+ // istream *is Input stream
+ // Return:
+ // none.
+
+ *is >> fDebug;
+ *is >> fModule;
+ *is >> fNdigits;
+ *is >> fNRawClusters;
+ *is >> fNperMax;
+ *is >> fDeclusterFlag;
+ *is >> fClusterSize;
+ *is >> fNPeaks;
+}
+//______________________________________________________________________
+ostream &operator<<(ostream &os,AliITSClusterFinder &source){
+ // Standard output streaming function.
+ // Inputs:
+ // ostream *os Output stream
+ // AliITSClusterFinder &source Class to be printed
+ // Output:
+ // ostream *os Output stream
+ // Return:
+ // none.
+
+ source.Print(&os);
+ return os;
+}
+//______________________________________________________________________
+istream &operator>>(istream &is,AliITSClusterFinder &source){
+ // Standard output streaming function.
+ // Inputs:
+ // istream *is Input stream
+ // AliITSClusterFinder &source Class to be read in.
+ // Output:
+ // istream *is Input stream
+ // Return:
+ // none.
+
+ source.Read(&is);
+ return is;
+}
+//______________________________________________________________________
+void AliITSClusterFinder::CheckLabels2(Int_t lab[10]) {
+ //------------------------------------------------------------
+ // Tries to find mother's labels
+ //------------------------------------------------------------
+ AliRunLoader *rl = AliRunLoader::GetRunLoader();
+ TTree *trK=(TTree*)rl->TreeK();
+
+ if(trK){
+ Int_t nlabels =0;
+ for (Int_t i=0;i<10;i++) if (lab[i]>=0) nlabels++;
+ if(nlabels == 0) return; // In case of no labels just exit
+
+
+ Int_t ntracks = gAlice->GetMCApp()->GetNtrack();
+
+ for (Int_t i=0;i<10;i++){
+ Int_t label = lab[i];
+ if (label>=0 && label<ntracks) {
+ TParticle *part=(TParticle*)gAlice->GetMCApp()->Particle(label);
+
+ if (part->P() < 0.02) {
+ Int_t m=part->GetFirstMother();
+ if (m<0) {
+ continue;
+ }
+ if (part->GetStatusCode()>0) {
+ continue;
+ }
+ lab[i]=m;
+ }
+ else
+ if (part->P() < 0.12 && nlabels>3) {
+ lab[i]=-2;
+ nlabels--;
+ }
+ }
+ else{
+ if ( (label>ntracks||label <0) && nlabels>3) {
+ lab[i]=-2;
+ nlabels--;
+ }
+ }
+ }
+ if (nlabels>3){
+ for (Int_t i=0;i<10;i++){
+ if (nlabels>3){
+ Int_t label = lab[i];
+ if (label>=0 && label<ntracks) {
+ TParticle *part=(TParticle*)gAlice->GetMCApp()->Particle(label);
+ if (part->P() < 0.1) {
+ lab[i]=-2;
+ nlabels--;
+ }
+ }
+ }
+ }
+ }
+
+ //compress labels -- if multi-times the same
+ Int_t lab2[10];
+ for (Int_t i=0;i<10;i++) lab2[i]=-2;
+ for (Int_t i=0;i<10 ;i++){
+ if (lab[i]<0) continue;
+ for (Int_t j=0;j<10 &&lab2[j]!=lab[i];j++){
+ if (lab2[j]<0) {
+ lab2[j]= lab[i];
+ break;
+ }
+ }
+ }
+ for (Int_t j=0;j<10;j++) lab[j]=lab2[j];
+
+ }
+}
+
+//______________________________________________________________________
+void AliITSClusterFinder::AddLabel(Int_t lab[10], Int_t label) {
+ //add label to the cluster
+ AliRunLoader *rl = AliRunLoader::GetRunLoader();
+ TTree *trK=(TTree*)rl->TreeK();
+ if(trK){
+ if(label<0) return; // In case of no label just exit
+
+ Int_t ntracks = gAlice->GetMCApp()->GetNtrack();
+ if (label>ntracks) return;
+ for (Int_t i=0;i<10;i++){
+ // if (label<0) break;
+ if (lab[i]==label) break;
+ if (lab[i]<0) {
+ lab[i]= label;
+ break;
+ }
+ }
+ }
+}
+
+
+//______________________________________________________________________
+void AliITSClusterFinder::
+FindCluster(Int_t k,Int_t maxz,AliBin *bins,Int_t &n,Int_t *idx) {
+ //------------------------------------------------------------
+ // returns an array of indices of digits belonging to the cluster
+ // (needed when the segmentation is not regular)
+ //------------------------------------------------------------
+ if (n<200) idx[n++]=bins[k].GetIndex();
+ bins[k].Use();
+
+ if (bins[k-maxz].IsNotUsed()) FindCluster(k-maxz,maxz,bins,n,idx);
+ if (bins[k-1 ].IsNotUsed()) FindCluster(k-1 ,maxz,bins,n,idx);
+ if (bins[k+maxz].IsNotUsed()) FindCluster(k+maxz,maxz,bins,n,idx);
+ if (bins[k+1 ].IsNotUsed()) FindCluster(k+1 ,maxz,bins,n,idx);
+ /*
+ if (bins[k-maxz-1].IsNotUsed()) FindCluster(k-maxz-1,maxz,bins,n,idx);
+ if (bins[k-maxz+1].IsNotUsed()) FindCluster(k-maxz+1,maxz,bins,n,idx);
+ if (bins[k+maxz-1].IsNotUsed()) FindCluster(k+maxz-1,maxz,bins,n,idx);
+ if (bins[k+maxz+1].IsNotUsed()) FindCluster(k+maxz+1,maxz,bins,n,idx);
+ */
+}
+
+//______________________________________________________________________
+Bool_t AliITSClusterFinder::IsMaximum(Int_t k,Int_t max,const AliBin *bins) {
+ //------------------------------------------------------------
+ //is this a local maximum ?
+ //------------------------------------------------------------
+ UShort_t q=bins[k].GetQ();
+ if (q==1023) return kFALSE;
+ if (bins[k-max].GetQ() > q) return kFALSE;
+ if (bins[k-1 ].GetQ() > q) return kFALSE;
+ if (bins[k+max].GetQ() > q) return kFALSE;
+ if (bins[k+1 ].GetQ() > q) return kFALSE;
+ if (bins[k-max-1].GetQ() > q) return kFALSE;
+ if (bins[k+max-1].GetQ() > q) return kFALSE;
+ if (bins[k+max+1].GetQ() > q) return kFALSE;
+ if (bins[k-max+1].GetQ() > q) return kFALSE;
+ return kTRUE;
+}
+
+//______________________________________________________________________
+void AliITSClusterFinder::
+FindPeaks(Int_t k,Int_t max,AliBin *b,Int_t *idx,UInt_t *msk,Int_t& n) {
+ //------------------------------------------------------------
+ //find local maxima
+ //------------------------------------------------------------
+ if (n<31)
+ if (IsMaximum(k,max,b)) {
+ idx[n]=k; msk[n]=(2<<n);
+ n++;
+ }
+ b[k].SetMask(0);
+ if (b[k-max].GetMask()&1) FindPeaks(k-max,max,b,idx,msk,n);
+ if (b[k-1 ].GetMask()&1) FindPeaks(k-1 ,max,b,idx,msk,n);
+ if (b[k+max].GetMask()&1) FindPeaks(k+max,max,b,idx,msk,n);
+ if (b[k+1 ].GetMask()&1) FindPeaks(k+1 ,max,b,idx,msk,n);
+}
+
+//______________________________________________________________________
+void AliITSClusterFinder::
+MarkPeak(Int_t k, Int_t max, AliBin *bins, UInt_t m) {
+ //------------------------------------------------------------
+ //mark this peak
+ //------------------------------------------------------------
+ UShort_t q=bins[k].GetQ();
+
+ bins[k].SetMask(bins[k].GetMask()|m);
+
+ if (bins[k-max].GetQ() <= q)
+ if ((bins[k-max].GetMask()&m) == 0) MarkPeak(k-max,max,bins,m);
+ if (bins[k-1 ].GetQ() <= q)
+ if ((bins[k-1 ].GetMask()&m) == 0) MarkPeak(k-1 ,max,bins,m);
+ if (bins[k+max].GetQ() <= q)
+ if ((bins[k+max].GetMask()&m) == 0) MarkPeak(k+max,max,bins,m);
+ if (bins[k+1 ].GetQ() <= q)
+ if ((bins[k+1 ].GetMask()&m) == 0) MarkPeak(k+1 ,max,bins,m);
+}
+
+//______________________________________________________________________
+void AliITSClusterFinder::
+MakeCluster(Int_t k,Int_t max,AliBin *bins,UInt_t m,AliITSRecPoint &c) {
+ //------------------------------------------------------------
+ //make cluster using digits of this peak
+ //------------------------------------------------------------
+ Float_t q=(Float_t)bins[k].GetQ();
+ Int_t i=k/max, j=k-i*max;
+
+ c.SetQ(c.GetQ()+q);
+ c.SetY(c.GetY()+i*q);
+ c.SetZ(c.GetZ()+j*q);
+ c.SetSigmaY2(c.GetSigmaY2()+i*i*q);
+ c.SetSigmaZ2(c.GetSigmaZ2()+j*j*q);
+
+ bins[k].SetMask(0xFFFFFFFE);
+
+ if (bins[k-max].GetMask() == m) MakeCluster(k-max,max,bins,m,c);
+ if (bins[k-1 ].GetMask() == m) MakeCluster(k-1 ,max,bins,m,c);
+ if (bins[k+max].GetMask() == m) MakeCluster(k+max,max,bins,m,c);
+ if (bins[k+1 ].GetMask() == m) MakeCluster(k+1 ,max,bins,m,c);
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff