// Author: Constantin Loizides <mailto:loizides@ikf.uni-frankfurt.de>
//*-- Copyright © ALICE HLT Group
+/** /class AliL3HoughTransformerLUT
+//<pre>
+//_____________________________________________________________
+// AliL3HoughTransformerLUT
+//
+// Hough transformation class using Look-UP-Tables
+//
+//</pre>
+*/
#include "AliL3StandardIncludes.h"
#include "AliL3MemHandler.h"
#include "AliL3DigitData.h"
#include "AliL3Histogram.h"
+#include "AliL3HistogramAdaptive.h"
-#if GCCVERSION == 3
+#if __GNUC__ >= 3
using namespace std;
#endif
-//#define FULLLUT
-
-//_____________________________________________________________
-// AliL3HoughTransformerLUT
-//
-// Hough transformation class using Look-UP-Tables
-//
-
ClassImp(AliL3HoughTransformerLUT)
AliL3HoughTransformerLUT::AliL3HoughTransformerLUT() : AliL3HoughBaseTransformer()
{
+ // default contructor
+ fParamSpace=0;
fMinRow=0;
fMaxRow=0;
fLastPad=0;
fLastIndex=0;
fAccCharge=0;
-
- fDoMC = kFALSE;
+ fX=fY=0.;
}
-AliL3HoughTransformerLUT::AliL3HoughTransformerLUT(Int_t slice,Int_t patch,Int_t n_eta_segments) : AliL3HoughBaseTransformer(slice,patch,n_eta_segments)
+AliL3HoughTransformerLUT::AliL3HoughTransformerLUT(Int_t slice,Int_t patch,Int_t nEtaSegments) : AliL3HoughBaseTransformer(slice,patch,nEtaSegments)
{
+ // constructor
+ fParamSpace=0;
fMinRow=0;
fMaxRow=0;
fLastPad=0;
fLastIndex=0;
fAccCharge=0;
- fDoMC=kFALSE;
+ fX=fY=0.;
- Init(slice,patch,n_eta_segments);
+ Init(slice,patch,nEtaSegments);
}
AliL3HoughTransformerLUT::~AliL3HoughTransformerLUT()
{
+ // destructor
DeleteHistograms();
if(fNRows){
void AliL3HoughTransformerLUT::DeleteHistograms()
{
+ // deletes all histograms
if(fNPhi0){
delete[] fLUT2sinphi0;
delete[] fLUT2cosphi0;
}
}
-void AliL3HoughTransformerLUT::Init(Int_t slice,Int_t patch,Int_t n_eta_segments,Int_t n_seqs)
+void AliL3HoughTransformerLUT::Init(Int_t slice,Int_t patch,Int_t nEtaSegments,Int_t /*nSeqs*/)
{
- AliL3HoughBaseTransformer::Init(slice,patch,n_eta_segments);
+ // Initialization
+ AliL3HoughBaseTransformer::Init(slice,patch,nEtaSegments);
//delete old LUT tables
if(fNRows){
fMinRow=AliL3Transform::GetFirstRow(patch);;
fMaxRow=AliL3Transform::GetLastRow(patch);;
fNRows=AliL3Transform::GetNRows(patch);;
- fNEtas=n_eta_segments;
+ fNEtas=nEtaSegments;
if(fNEtas!=GetNEtaSegments()) {
cerr << "AliL3HoughTransformerLUT::Init -> Error: Number of Etas must be equal!" << endl;
exit(1);
}
AliL3Transform::Slice2Sector(slice,fMinRow,fSector,fSectorRow);
- fZSign = slice < 18 ? 1:-1;
+ fZSign = slice < 18 ? 1:-1; //see AliL3Transformer
fSlice = slice;
fZLengthPlusOff=AliL3Transform::GetZLength()+AliL3Transform::GetZOffset();
fTimeWidth=AliL3Transform::GetZWidth();
else
fPadPitch=AliL3Transform::GetPadPitchWidthUp();
- Float_t etamax_=GetEtaMax();
- Float_t etamin_=GetEtaMin();
- fEtaSlice=(etamax_-etamin_)/n_eta_segments;
+ Float_t etaMax=GetEtaMax();
+ Float_t etaMin=GetEtaMin();
+ fEtaSlice=(etaMax-etaMin)/nEtaSegments;
//lookup tables for X and Y
fLUTX=new Float_t[fNRows];
}
//lookup tables for rz2s <=> etas
+ //will only be used ifdef FULLLUT
fLUTEta=new Float_t[fNEtas];
fLUTEtaReal=new Float_t[fNEtas];
for(Int_t rr=0;rr<fNEtas;rr++){
- Float_t eta=etamin_+(rr+1)*fEtaSlice;
+ Float_t eta=etaMin+(rr+1)*fEtaSlice;
fLUTEta[rr]=CalcRoverZ2(eta);
fLUTEtaReal[rr]=eta-0.5*fEtaSlice;
//cout << rr << ": " << eta << " " << fLUTEtaReal[rr] << " " << GetEta(rr,fSlice) << " - " << fLUTEta[rr] << endl;
}
}
-void AliL3HoughTransformerLUT::CreateHistograms(Int_t nxbin,Double_t pt_min,Int_t nybin,Double_t phimin,Double_t phimax)
+void AliL3HoughTransformerLUT::CreateHistograms(Float_t ptmin,Float_t ptmax,Float_t ptres,
+ Int_t nybin,Float_t psi)
+{
+ //Create histograms.
+ //_Only_ to be used in case of the adaptive histograms!
+ //phimax is given in radians!!
+
+ if(ptmin > ptmax)
+ {
+ cerr<<"AliL3HoughTransformerLUT::CreateHistograms: Error in ptrange "<<ptmin<<" "<<ptmax<<endl;
+ return;
+ }
+ if(psi < 0)
+ {
+ cerr<<"AliL3HoughTransformerLUT::CreateHistograms: Wrong psi-angle "<<psi<<endl;
+ return;
+ }
+
+ fParamSpace = new AliL3Histogram*[fNEtas];
+ Char_t histname[256];
+ for(Int_t i=0; i<GetNEtaSegments(); i++)
+ {
+ sprintf(histname,"paramspace_%d",i);
+ fParamSpace[i] = new AliL3HistogramAdaptive(histname,ptmin,ptmax,ptres,nybin,-psi,psi);
+ }
+
+ //create lookup table for sin and cos
+ fNPhi0=nybin;
+ fLUTphi0=new Float_t[fNPhi0];
+ fLUT2sinphi0=new Float_t[fNPhi0];
+ fLUT2cosphi0=new Float_t[fNPhi0];
+ fLUTKappa=new Float_t[fNPhi0];
+ AliL3Histogram *hist=fParamSpace[0];
+ Int_t i=0;
+ for(Int_t b=hist->GetFirstYbin(); b<=hist->GetLastYbin(); b++)
+ {
+ Float_t phi0 = hist->GetBinCenterY(b);
+ fLUTphi0[i]=phi0;
+ fLUT2sinphi0[i]=2.*sin(phi0);
+ fLUT2cosphi0[i]=2.*cos(phi0);
+ fLUTKappa[i]=0.;
+ i++;
+ //cout << i << ": " << fLUTphi0[i] << " " << fLUT2sinphi0[i] << " " << fLUT2cosphi0[i] << endl;
+ }
+}
+
+void AliL3HoughTransformerLUT::CreateHistograms(Int_t nxbin,Float_t ptMin,Int_t nybin,Float_t phimin,Float_t phimax)
{
//Create the histograms (parameter space).
//These are 2D histograms, span by kappa (curvature of track) and phi0 (emission angle with x-axis).
//The arguments give the range and binning;
//nxbin = #bins in kappa
//nybin = #bins in phi0
- //pt_min = mimium Pt of track (corresponding to maximum kappa)
+ //ptMin = mimium Pt of track (corresponding to maximum kappa)
//phi_min = mimimum phi0 (degrees)
//phi_max = maximum phi0 (degrees)
- Double_t x = AliL3Transform::GetBFact()*AliL3Transform::GetBField()/pt_min;
- Double_t torad = AliL3Transform::Pi()/180;
- CreateHistograms(nxbin,-1.*x,x,nybin,phimin*torad,phimax*torad);
+ Double_t x = AliL3Transform::GetBFact()*AliL3Transform::GetBField()/ptMin;
+ //Double_t torad = AliL3Transform::Pi()/180;
+ CreateHistograms(nxbin,-1.*x,x,nybin,phimin/**torad*/,phimax/**torad*/);
}
-void AliL3HoughTransformerLUT::CreateHistograms(Int_t nxbin,Double_t xmin,Double_t xmax,Int_t nybin,Double_t ymin,Double_t ymax)
+void AliL3HoughTransformerLUT::CreateHistograms(Int_t nxbin,Float_t xmin,Float_t xmax,Int_t nybin,Float_t ymin,Float_t ymax)
{
fParamSpace = new AliL3Histogram*[fNEtas];
}
//create lookup table for sin and cos
- fNPhi0=nybin+1;
-
+ fNPhi0=nybin;
fLUTphi0=new Float_t[fNPhi0];
fLUT2sinphi0=new Float_t[fNPhi0];
fLUT2cosphi0=new Float_t[fNPhi0];
fLUTKappa=new Float_t[fNPhi0];
- Float_t diff=(ymax-ymin)/nybin;
- Float_t phi0=ymin-0.5*diff;
- for(Int_t i=0; i<fNPhi0; i++){
- phi0+=diff;
- fLUTphi0[i]=phi0;
- fLUT2sinphi0[i]=2.*sin(phi0);
- fLUT2cosphi0[i]=2.*cos(phi0);
- fLUTKappa[i]=0.;
- //cout << i << ": " << fLUTphi0[i] << " " << fLUT2sinphi0[i] << " " << fLUT2cosphi0[i] << endl;
- }
+
+ AliL3Histogram *hist=fParamSpace[0];
+ Int_t i=0;
+ for(Int_t b=hist->GetFirstYbin(); b<=hist->GetLastYbin(); b++)
+ {
+ Float_t phi0 = hist->GetBinCenterY(b);
+ fLUTphi0[i]=phi0;
+ fLUT2sinphi0[i]=2.*sin(phi0);
+ fLUT2cosphi0[i]=2.*cos(phi0);
+ fLUTKappa[i]=0.;
+ //cout << i << ": " << fLUTphi0[i] << " " << fLUT2sinphi0[i] << " " << fLUT2cosphi0[i] << endl;
+ i++;
+ }
}
void AliL3HoughTransformerLUT::Reset()
fParamSpace[i]->Reset();
}
-Int_t AliL3HoughTransformerLUT::GetEtaIndex(Double_t eta)
+Int_t AliL3HoughTransformerLUT::GetEtaIndex(Double_t eta) const
{
//Return the histogram index of the corresponding eta.
#endif
}
-Int_t AliL3HoughTransformerLUT::FindIndex(Float_t rz2, Int_t start)
+AliL3Histogram *AliL3HoughTransformerLUT::GetHistogram(Int_t etaIndex)
{
- //could improve search through devide and conquere strategy
-
- Int_t index=start;
- if(index==-100){
- index=0;
- while((index<fNEtas)&&(rz2<=fLUTEta[index])){
- index++;
- }
- } else {
- while((index>=0)&&(rz2>fLUTEta[index])){
- index--;
- }
- index++;
- }
- //cout << start << " - " << index << " " << ": " << rz2 << " " << fLUTEta[index] << endl;
-
- return index;
-}
-
-inline AliL3Histogram *AliL3HoughTransformerLUT::GetHistogram(Int_t eta_index)
-{
- if(!fParamSpace || eta_index >= fNEtas || eta_index < 0)
+ // gets hitogram
+ if(!fParamSpace || etaIndex >= fNEtas || etaIndex < 0)
return 0;
- if(!fParamSpace[eta_index])
+ if(!fParamSpace[etaIndex])
return 0;
- return fParamSpace[eta_index];
-}
-
-Float_t AliL3HoughTransformerLUT::CalcRoverZ2(Float_t eta)
-{
- Float_t e=exp(2*eta);
- Float_t ret=(e+1)/(e-1);
- ret*=ret;
- return ret;
-}
-
-Float_t AliL3HoughTransformerLUT::CalcEta(Float_t roverz2)
-{
- Float_t rz=sqrt(roverz2);
- if(fZSign<0) rz=-rz;
- Float_t ret=(1+rz)/(rz-1);
- ret=0.5*log(ret);
- return ret;
-}
-
-Float_t AliL3HoughTransformerLUT::CalcX(Int_t row)
-{
- return fLUTX[row];
-}
-
-Float_t AliL3HoughTransformerLUT::CalcY(Int_t pad,Int_t row)
-{
- return pad*fPadPitch-fLUTY[row];
+ return fParamSpace[etaIndex];
}
-Float_t AliL3HoughTransformerLUT::CalcZ(Int_t time)
+Double_t AliL3HoughTransformerLUT::GetEta(Int_t etaIndex,Int_t slice) const
{
- Float_t ret=time*fTimeWidth;
- if(fZSign>0) ret=fZLengthPlusOff-ret;
- else ret=ret-fZLengthPlusOff;
- return ret;
-}
-
-Double_t AliL3HoughTransformerLUT::GetEta(Int_t eta_index,Int_t slice)
-{
- if(eta_index >= fNEtas || eta_index < 0){
- //LOG(AliL3Log::kWarning,"AliL3HoughTransformerLUT::GetEta","Index") << "Index out of range."<<ENDLOG;
+ // gets eta
+ if(etaIndex >= fNEtas || etaIndex < 0){
+ LOG(AliL3Log::kWarning,"AliL3HoughTransformerLUT::GetEta","Index") << "Index out of range."<<ENDLOG;
return 0.;
}
if(slice != fSlice){
- //LOG(AliL3Log::kWarning,"AliL3HoughTransformerLUT::GetEta","Index") << "Given slice does not match internal slice."<<ENDLOG;
+ LOG(AliL3Log::kWarning,"AliL3HoughTransformerLUT::GetEta","Index") << "Given slice does not match internal slice."<<ENDLOG;
return 0.;
}
- //return (CalcEta(fLUTEta[eta_index])-0.5*fEtaSlice);
- return(fLUTEtaReal[eta_index]);
-}
-
-void AliL3HoughTransformerLUT::AddCurveToHistogram(Int_t new_eta_index)
-{
- //Get the correct histogrampointer:
- AliL3Histogram *hist = fParamSpace[fLastIndex];
- if(!hist){
- //LOG(AliL3Log::kWarning,"AliL3HoughTransformerLUT::TransformCircle","Histograms")<<"Error getting histogram in index "<<fLastIndex<<"."<<ENDLOG;
- return;
- }
-
- //Fill the histogram along the phirange
- for(Int_t b=0; b<fNPhi0; b++){
- hist->Fill(fLUTKappa[b],fLUTphi0[b],fAccCharge);
- //cout << kappa << " " << fLUTphi0[b] << " " << fAccCharge << endl;
- }
-
- fAccCharge=0;
- fLastIndex=new_eta_index;
+ return(fLUTEtaReal[etaIndex]);
}
void AliL3HoughTransformerLUT::TransformCircle()
//
//where R^2 = x^2 + y^2
//
- //Each pixel then transforms into a curve in the (kappa,phi0)-space. In order to find
- //which histogram in which the pixel should be transformed, the eta-value is calcluated
- //and the proper histogram index is found by GetEtaIndex(eta).
+ //After a day of testing it is proven that this h
AliL3DigitRowData *tempPt = GetDataPointer();
if(!tempPt)
<<"No input data "<<ENDLOG;
return;
}
-
+
+ Int_t lowch=GetLowerThreshold();
+ Int_t highch=GetUpperThreshold();
+
//Loop over the padrows:
for(Int_t i=fMinRow, row=0; i<=fMaxRow; i++, row++)
{
continue;
}
- //calculate x for this row
- Float_t x = CalcX(row);
- Float_t x2=x*x;
- Float_t r2=0;
//start a new row
fLastPad=-1;
-
- if(fAccCharge>0) cerr << "Big error " << endl;
-
- //accumulate charge per histogram
+ //store x for this row
+ fX = CalcX(row);
+ //accumulate charge per etaslice
fAccCharge=0;
- fLastIndex=-1;
+ //last histogram
+ fLastIndex=-1;
//Loop over the data on this padrow:
for(UInt_t j=0; j<tempPt->fNDigit; j++)
UShort_t charge = digPt[j].fCharge;
//check threshold
- if((Int_t)charge <= GetLowerThreshold() || (Int_t)charge > GetUpperThreshold())
+ if((Int_t)charge <= lowch)
continue;
+ if ((Int_t)charge > highch)
+ charge=highch;
UChar_t pad = digPt[j].fPad;
UShort_t time = digPt[j].fTime;
if(fLastPad!=pad){ //only update if necessary
- //if there is accumalated charge, put it in the right histogram
- if(fAccCharge>0) AddCurveToHistogram(-1);
+ //if there is accumalated charge,
+ //put it in the old histogram
+ //using the old X and Y values
+ if(fAccCharge>0) AddCurveToHistogram(-1); //fLastIndex will be set to -1
#ifdef FULLLUT
fLastIndex=fNEtas-1;
#endif
- //calculate hough for the new pad
- Float_t y = CalcY(pad,row);
- Float_t y2 = y*y;
- r2 = x2 + y2;
- Float_t xr2=x/r2;
- Float_t yr2=y/r2;
-
- //AliL3Histogram *hist = fParamSpace[0];
- //Int_t bb=hist->GetFirstYbin();
- //if(fNPhi0-1!=hist->GetLastYbin()) cerr << "should not be" << endl;
- for(Int_t b=0; b<fNPhi0; b++){
- fLUTKappa[b]=(yr2*fLUT2cosphi0[b]-xr2*fLUT2sinphi0[b]);
-
- //Float_t phi=atan2(y,x);
- //Float_t phi0 = hist->GetBinCenterY(bb);
- //Float_t R=sqrt(r2);
- //Float_t kappa = 2*sin(phi - phi0)/R;
- //cout << fLUTKappa[b] << " " << kappa << endl;
- //bb++;
- //Int_t bina=hist->FindBin(fLUTphi0[b],fLUTKappa[b]);
- //Int_t binb=hist->FindBin(phi0,kappa);
- //if(bina!=binb) cout << bina << " " << binb << endl;
- }
-
+ //calculate Y for the new pad
+ fY = CalcY(pad,row);
+ //remember new pad
fLastPad=pad;
}
+#ifdef FULLLUT
//find eta slice
Float_t z = CalcZ(time);
- Float_t z2=z*z;
-#ifdef FULLLUT
+ Float_t z2=z*z;
Float_t rz2 = 1 + r2/z2;
- Int_t eta_index = FindIndex(rz2,fLastIndex);
+ Int_t etaIndex = FindIndex(rz2,fLastIndex);
#else
- Double_t r = sqrt(r2+z2);
- Double_t etaval = 0.5 * log((r+z)/(r-z));
- Int_t eta_index = GetEtaIndex(etaval);
+ Float_t z = CalcZ(time);
+ Double_t r = sqrt(fX*fX+fY*fY+z*z);
+ Double_t eta = 0.5 * log((r+z)/(r-z));
+ Int_t etaIndex = GetEtaIndex(eta);
#endif
- //cout << row << " " << (int)pad << " " << (int)time << " " << eta_index << " " << fLastIndex << endl;
- if(eta_index < 0 || eta_index >= fNEtas){
- //LOG(AliL3Log::kWarning,"AliL3HoughTransformerLUT::TransformCircle","Histograms")<<"No histograms corresponding to eta index value of "<<eta_index<<"."<<ENDLOG;
+ if(etaIndex < 0 || etaIndex >= fNEtas){
+ LOG(AliL3Log::kWarning,"AliL3HoughTransformerLUT::TransformCircle","Histograms")<<"No histograms corresponding to eta index value of "<<etaIndex<<"."<<ENDLOG;
continue;
}
#ifndef FULLLUT
- if(fLastIndex==-1) fLastIndex=eta_index;
+ if(fLastIndex==-1) fLastIndex=etaIndex;
#endif
- if(fLastIndex!=eta_index){
- AddCurveToHistogram(eta_index);
+ if(fLastIndex!=etaIndex){ //enter old values first
+ AddCurveToHistogram(etaIndex);
}
fAccCharge+=charge;
//Move the data pointer to the next padrow:
AliL3MemHandler::UpdateRowPointer(tempPt);
}
-
- if(fAccCharge>0) cerr << "Big error " << endl;
-}
-
-Int_t AliL3HoughTransformerLUT::GetTrackID(Int_t eta_index,Double_t kappa,Double_t psi)
-{
- if(fDoMC)
- {
- cerr<<"AliL3HoughTransformerLUT does not provide MC information..."<<endl;
- return -1;
- }
-
- return -1;
}
void AliL3HoughTransformerLUT::Print()
{
+ // debug printout
cout << "fSlice: " << GetSlice() << endl;
cout << "fPatch: " << GetPatch() << endl;
cout << "fSector: " << fSector << endl;
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff