* provided "as is" without express or implied warranty. *
**************************************************************************/
-#include <TMath.h>
-
#include "AliITSsegmentationSPD.h"
-
+//#include "AliITSgeom.h"
+//////////////////////////////////////////////////////
+// Segmentation class for //
+// pixels //
+// //
+//////////////////////////////////////////////////////
ClassImp(AliITSsegmentationSPD)
+//_____________________________________________________________________________
+ AliITSsegmentationSPD::AliITSsegmentationSPD(): AliITSsegmentation(),
+fNpx(0),
+fNpz(0){
+ // Default constructor
+ for(Int_t k=0; k<256; k++){
+ fCellSizeX[k] = 0.;
+ fCellSizeZ[k] = 0.;
+ }
+}
-Float_t ColFromZ300(Float_t z) {
+//_____________________________________________________________________________
+Float_t AliITSsegmentationSPD::ColFromZ300(Float_t z) const {
// Get column number for each z-coordinate taking into account the
// extra pixels in z direction assuming 300 micron sized pixels.
Float_t col = 0.0;
return col;
}
//_____________________________________________________________________________
-Float_t ZFromCol300(Int_t col) {
+Float_t AliITSsegmentationSPD::ZFromCol300(Int_t col) const {
// same comments as above
// Get z-coordinate for each colunm number
Float_t pitchz = 300.0;
return z;
}
//_____________________________________________________________________________
-Float_t ZpitchFromCol300(Int_t col) {
+Float_t AliITSsegmentationSPD::ZpitchFromCol300(Int_t col) const {
// returns Z pixel pitch for 300 micron pixels.
- return 300.0;
+
+ col = 0; // done to remove unused variable warning.
+ return 300.0;
}
//_____________________________________________________________________________
-Float_t ColFromZ(Float_t z) {
-// hard-wired - keep it like this till we can parametrise
-// and get rid of AliITSgeomSPD425
-// Get column number for each z-coordinate taking into account the
-// extra pixels in z direction
-
+Float_t AliITSsegmentationSPD::ColFromZ(Float_t z) const {
+ // hard-wired - keep it like this till we can parametrise
+ // and get rid of AliITSgeomSPD425
+ // Get column number for each z-coordinate taking into account the
+ // extra pixels in z direction
+ Int_t i;
+ Float_t s,col;
+
+ if(z<0||z>fDz){
+ Error("ColFromZ","z=%f outside of range 0.0<=z<fDz=%f",z,fDz);
+ return 0.0; // error
+ } // end if outsize of detector
+ s = 0.0;
+ i = -1;
+ while(z>s){
+ i++;
+ s += fCellSizeZ[i];
+ } // end while
+ s -= fCellSizeZ[i];
+ col = (Float_t) i + (z-s)/fCellSizeZ[i];
+ return col;
+
+/*
Float_t col = 0;
Float_t pitchz = 425;
if( z < 13175) {
} else if( z < 83600) {
col = 161 + (z - 70425)/pitchz;
}
- return col;
+ return TMath::Abs(col);*/
}
//_____________________________________________________________________________
-Float_t ZFromCol(Int_t col) {
-// same comments as above
-// Get z-coordinate for each colunm number
-
+Float_t AliITSsegmentationSPD::ZFromCol(Int_t col) const {
+ // same comments as above
+ // Get z-coordinate for each colunm number
+ Int_t i;
+ Float_t z;
+
+ if(col<0||col>=fNpz){
+ Error("ZFromCol","col=%d outside of range 0<=col<fNpZ=%d",col,fNpz);
+ return 0.0; // error
+ } // end if outsize of detector
+ z = 0.0;
+ for(i=0;i<col;i++) z += fCellSizeZ[i];
+ z += 0.5*fCellSizeZ[col];
+ return z;
+
+/*
Float_t pitchz = 425;
Float_t z = 0;
if( col >=0 && col <= 30 ) {
z = 69175 + (col -159 + 0.5)*pitchz;
} else if( col >= 161 && col <= 191) {
z = 70425 + (col -161 + 0.5)*pitchz;
- }
+ }
- return z;
+ return z;*/
}
-
-Float_t ZpitchFromCol(Int_t col) {
-// Get pitch size in z direction for each colunm
-
- Float_t pitchz = 425;
- if( col >=32 && col <= 33 ) {
- pitchz = 625;
- } else if( col >= 64 && col <= 65) {
- pitchz = 625;
- } else if( col >= 96 && col <= 97) {
- pitchz = 625;
- } else if( col >= 128 && col <= 129) {
- pitchz = 625;
- } else if( col >= 160 && col <= 161) {
- pitchz = 625;
- }
- return pitchz;
+//______________________________________________________________________
+Float_t AliITSsegmentationSPD::ZpitchFromCol(Int_t col) const {
+ // Get pitch size in z direction for each colunm
+
+ Float_t pitchz = 425.;
+ if(col < 0){
+ pitchz = 0.0;
+ } else if(col >= 31 && col <= 32) {
+ pitchz = 625.;
+ } else if(col >= 63 && col <= 64) {
+ pitchz = 625.;
+ } else if(col >= 95 && col <= 96) {
+ pitchz = 625.;
+ } else if(col >= 127 && col <= 128) {
+ pitchz = 625.;
+ } else if(col >= 159 && col <= 160) {
+ pitchz = 625.;
+ } else if(col>=192){
+ pitchz = 425.;
+ }
+ return pitchz;
}
-
-AliITSsegmentationSPD::AliITSsegmentationSPD(){
- // Default constructor
- fNpx = 0;
- fNpz = 0;
- fCorr=0;
- fGeom = 0;
-
-}
-//____________________________________________________________________________
-AliITSsegmentationSPD::AliITSsegmentationSPD(AliITSgeom *gm){
+//______________________________________________________________________
+AliITSsegmentationSPD::AliITSsegmentationSPD(AliITSgeom *gm):
+fNpx(0),
+fNpz(0){
// Constructor
fCorr=0;
- fNpx = 0;
- fNpz = 0;
Init();
fGeom = gm;
}
-//____________________________________________________________________________
-AliITSsegmentationSPD& AliITSsegmentationSPD::operator=(AliITSsegmentationSPD &source){
+//______________________________________________________________________
+void AliITSsegmentationSPD::Copy(TObject &obj) const {
+ // protected method. copy this to obj
+ AliITSsegmentation::Copy(obj);
+ ((AliITSsegmentationSPD& ) obj).fNpx = fNpx;
+ ((AliITSsegmentationSPD& ) obj).fNpz = fNpz;
+ Int_t i;
+ for(i=0;i<256;i++)
+ ((AliITSsegmentationSPD& ) obj).fCellSizeX[i] = fCellSizeX[i];
+ for(i=0;i<280;i++)
+ ((AliITSsegmentationSPD& ) obj).fCellSizeZ[i] = fCellSizeZ[i];
+}
+
+//______________________________________________________________________
+AliITSsegmentationSPD& AliITSsegmentationSPD::operator=(const AliITSsegmentationSPD &source){
// = operator
- Int_t i;
if(this==&source) return *this;
- this->fNpx = source.fNpx;
- this->fNpz = source.fNpz;
- this->fDx = source.fDx;
- this->fDy = source.fDy;
- for(i=0;i<256;i++) this->fCellSizeX[i] = source.fCellSizeX[i];
- for(i=0;i<280;i++) this->fCellSizeZ[i] = source.fCellSizeZ[i];
- this->fCorr = new TF1(*(source.fCorr));// make a proper copy of the function
- this->fGeom = source.fGeom; // copy only the pointers.
+ source.Copy(*this);
return *this;
}
//____________________________________________________________________________
-AliITSsegmentationSPD::AliITSsegmentationSPD(AliITSsegmentationSPD &source){
+AliITSsegmentationSPD::AliITSsegmentationSPD(const AliITSsegmentationSPD &source) :
+ AliITSsegmentation(source),
+fNpx(0),
+fNpz(0){
// copy constructor
- *this = source;
+ source.Copy(*this);
}
-//------------------------------
+//----------------------------------------------------------------------
+void AliITSsegmentationSPD::SetBinSize(Float_t *x,Float_t *z){
+ // Fills the array of pixel sizes in x, microns
+ // The input array x must have 256 elements.
+ Int_t i;
+
+ for(i=0;i<256;i++) fCellSizeX[i] = x[i];
+ for(i=0;i<280;i++) fCellSizeZ[i] = z[i];
+ return;
+}
+//----------------------------------------------------------------------
void AliITSsegmentationSPD::Init300(){
// Initialize infromation for 6 read out chip 300X50 micron pixel SPD
// detectors. This chip is 150 microns thick by 1.28 cm in x by 8.37 cm
// long. It has 256 50 micron pixels in x and 279 300 micron size
// pixels in z.
- Int_t i;
//const Float_t kconv=10000.;
+ Int_t i;
fNpx = 256; // The number of X pixel Cell same as in fCellSizeX array size
fNpz = 279; // The number of Z pixel Cell same as in fCellSizeZ array size
for(i=0;i<fNpx;i++) fCellSizeX[i] = 50.0; // microns all the same
- for(i=0;i<fNpz;i++) fCellSizeZ[i] = ZpitchFromCol300(i); // microns
- for(i=fNpz;i<280;i++) fCellSizeZ[i] = 0.0; // zero out rest of array
+ for(i=0;i<280;i++) fCellSizeZ[i] = ZpitchFromCol300(i); // microns
+// for(i=fNpz;i<280;i++) fCellSizeZ[i] = 0.0; // zero out rest of array
fDx = 0;
for(i=0;i<fNpx;i++) fDx += fCellSizeX[i];
fDz = 0;
// long. It has 256 50 micron pixels in x and 197 mostly 425 micron size
// pixels in z. The two pixels between each readout chip are 625 microns long.
- Int_t i;
//const Float_t kconv=10000.;
+ Int_t i;
fNpx = 256; // The number of X pixel Cell same as in fCellSizeX array size
fNpz = 192; // The number of Z pixel Cell same as in fCellSizeZ array size
for(i=0;i<fNpx;i++) fCellSizeX[i] = 50.0; // microns all the same
- for(i=0;i<fNpz;i++) fCellSizeZ[i] = ZpitchFromCol(i); // microns
- for(i=fNpz;i<280;i++) fCellSizeZ[i] = 0.0; // zero out rest of array
+ for(i=0;i<280;i++) fCellSizeZ[i] = ZpitchFromCol(i); // microns
+// for(i=fNpz;i<280;i++) fCellSizeZ[i] = 0.0; // zero out rest of array
fDx = 0;
for(i=0;i<fNpx;i++) fDx += fCellSizeX[i];
fDz = 0;
for(i=0;i<fNpz;i++) fDz += fCellSizeZ[i];
fDy = 300.0; //microns SPD sensitive layer thickness
- printf(" AliITSsegmentationSPD - Init: fNpx fNpz fDx fDz %d %d %f %f\n",fNpx, fNpz, fDx, fDz);
+ //printf(" AliITSsegmentationSPD - Init: fNpx fNpz fDx fDz %d %d %f %f\n",fNpx, fNpz, fDx, fDz);
}
//------------------------------
-void AliITSsegmentationSPD::SetNCells(Int_t p1, Int_t p2){
+void AliITSsegmentationSPD::SetNPads(Int_t p1, Int_t p2){
// for SPD this function should be used ONLY when a beam test setup
// configuration is studied
fNpz=p2;
}
-//------------------------------
-void AliITSsegmentationSPD::SetDetSize(Float_t p1, Float_t p2, Float_t p3){
- // for SPD this function should be used ONLY when a beam test setup
- // configuration is studied
- fDx=p1;
- fDz=p2;
- fDy=p3;
-
-}
//------------------------------
-Float_t AliITSsegmentationSPD::Dpx(Int_t i){
- //returs x pixel pitch for a give pixel
- return fCellSizeX[i];
+Float_t AliITSsegmentationSPD::Dpx(Int_t i) const {
+ //returs x pixel pitch for a give pixel
+ if(i<0||i>=256) return 0.0;
+ return fCellSizeX[i];
}
//------------------------------
-Float_t AliITSsegmentationSPD::Dpz(Int_t i){
- // returns z pixel pitch for a give pixel
- return ZpitchFromCol(i);
+Float_t AliITSsegmentationSPD::Dpz(Int_t i) const {
+ // returns z pixel pitch for a give pixel
+ if(i<0||i>=280) return 0.0;
+ return fCellSizeZ[i];
}
//------------------------------
-void AliITSsegmentationSPD::GetCellIxz(Float_t &x,Float_t &z,Int_t &ix,Int_t &iz){
+void AliITSsegmentationSPD::GetPadIxz(Float_t x,Float_t z,Int_t &ix,Int_t &iz) const {
// Returns pixel coordinates (ix,iz) for given real local coordinates (x,z)
//
// different segmentation on z
iz = (Int_t)(ColFromZ(z) + 1);
- x /= dpx;
- z = ColFromZ(z);
if (iz > fNpz) iz= fNpz;
if (ix > fNpx) ix= fNpx;
-
/*
if (iz < -fNpz) iz= -fNpz;
if (ix < -fNpx) ix=-fNpx;
}
//------------------------------
-void AliITSsegmentationSPD::GetCellCxz(Int_t ix,Int_t iz,Float_t &x,Float_t&z){
+void AliITSsegmentationSPD::GetPadTxz(Float_t &x,Float_t &z) const{
+// local transformation of real local coordinates (x,z)
+//
+
+ // expects x, z in microns
+
+ // same segmentation on x
+ Float_t dpx=Dpx(0);
+
+ x /= dpx;
+ z = ColFromZ(z);
+
+}
+//------------------------------
+void AliITSsegmentationSPD::GetPadCxz(Int_t ix,Int_t iz,Float_t &x,Float_t&z) const {
// Transform from pixel to real local coordinates
// returns x, z in microns
}
//------------------------------
void AliITSsegmentationSPD::
-Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]){
+Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]) const {
// returns the neighbouring pixels for use in Cluster Finders and the like.
/*
*Nlist=4;Xlist[0]=Xlist[1]=iX;Xlist[2]=iX-1;Xlist[3]=iX+1;
Xlist[7]=iX+1;
Zlist[7]=iZ-1;
}
+//______________________________________________________________________
+Bool_t AliITSsegmentationSPD::LocalToDet(Float_t x,Float_t z,
+ Int_t &ix,Int_t &iz) const {
+ // Transformation from Geant detector centered local coordinates (cm) to
+ // Pixel cell numbers ix and iz.
+ // Input:
+ // Float_t x detector local coordinate x in cm with respect to
+ // the center of the sensitive volume.
+ // Float_t z detector local coordinate z in cm with respect to
+ // the center of the sensitive volulme.
+ // Output:
+ // Int_t ix detector x cell coordinate. Has the range
+ // 0<=ix<fNpx.
+ // Int_t iz detector z cell coordinate. Has the range
+ // 0<=iz<fNpz.
+ // Return:
+ // kTRUE if point x,z is inside sensitive volume, kFALSE otherwise.
+ // A value of -1 for ix or iz indecates that this point is outside of the
+ // detector segmentation as defined.
+ Int_t i,j;
+ Float_t dx,dz;
+ const Float_t kconv = 1.0E-04; // converts microns to cm.
+
+ dx = -0.5*kconv*Dx();
+ dz = -0.5*kconv*Dz();
+ ix = -1;
+ iz = -1;
+ if(x<dx) return kFALSE; // outside x range.
+ if(z<dz) return kFALSE; // outside z range.
+ for(i=0;i<Npx();i++){
+ dx += kconv*fCellSizeX[i];
+ if(x<dx) break;
+ } // end for i
+ if(i>=Npx()) return kFALSE; // outside x range.
+ for(j=0;j<Npz();j++){
+ dz += kconv*fCellSizeZ[j];
+ if(z<dz) break;
+ } // end for j
+ if(j>=Npz()) return kFALSE; // outside z range.
+ ix = i;
+ iz = j;
+ return kTRUE; // Found ix and iz, return.
+}
+//______________________________________________________________________
+void AliITSsegmentationSPD::DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z) const
+{
+// Transformation from Detector cell coordiantes to Geant detector centerd
+// local coordinates (cm).
+// Input:
+// Int_t ix detector x cell coordinate. Has the range 0<=ix<fNpx.
+// Int_t iz detector z cell coordinate. Has the range 0<=iz<fNpz.
+// Output:
+// Float_t x detector local coordinate x in cm with respect to the
+// center of the sensitive volume.
+// Float_t z detector local coordinate z in cm with respect to the
+// center of the sensitive volulme.
+// If ix and or iz is outside of the segmentation range a value of -0.5*Dx()
+// or -0.5*Dz() is returned.
+ Int_t i,j;
+ const Float_t kconv = 1.0E-04; // converts microns to cm.
+
+ x = -0.5*kconv*Dx(); // default value.
+ z = -0.5*kconv*Dz(); // default value.
+ if(ix<0 || ix>=Npx()) return; // outside of detector
+ if(iz<0 || iz>=Npz()) return; // outside of detctor
+ for(i=0;i<ix;i++) x += kconv*fCellSizeX[i]; // sum up to cell ix-1
+ x += 0.5*kconv*fCellSizeX[ix]; // add 1/2 of cell ix for center location.
+ for(j=0;j<iz;j++) z += kconv*fCellSizeZ[j]; // sum up cell iz-1
+ z += 0.5*kconv*fCellSizeZ[iz]; // add 1/2 of cell iz for center location.
+ return; // Found x and z, return.
+}
+//______________________________________________________________________
+void AliITSsegmentationSPD::CellBoundries(Int_t ix,Int_t iz,
+ Double_t &xl,Double_t &xu,
+ Double_t &zl,Double_t &zu) const
+{
+// Transformation from Detector cell coordiantes to Geant detector centerd
+// local coordinates (cm).
+// Input:
+// Int_t ix detector x cell coordinate. Has the range 0<=ix<fNpx.
+// Int_t iz detector z cell coordinate. Has the range 0<=iz<fNpz.
+// Output:
+// Double_t xl detector local coordinate cell lower bounds x in cm
+// with respect to the center of the sensitive volume.
+// Double_t xu detector local coordinate cell upper bounds x in cm
+// with respect to the center of the sensitive volume.
+// Double_t zl detector local coordinate lower bounds z in cm with
+// respect to the center of the sensitive volulme.
+// Double_t zu detector local coordinate upper bounds z in cm with
+// respect to the center of the sensitive volulme.
+// If ix and or iz is outside of the segmentation range a value of -0.5*Dx()
+// and -0.5*Dx() or -0.5*Dz() and -0.5*Dz() are returned.
+ Int_t i,j;
+ const Float_t kconv = 1.0E-04; // converts microns to cm.
+ Float_t x,z;
+
+ xl = xu = x = -0.5*kconv*Dx(); // default value.
+ zl = zu = z = -0.5*kconv*Dz(); // default value.
+ if(ix<0 || ix>=Npx()) return; // outside of detector
+ if(iz<0 || iz>=Npz()) return; // outside of detctor
+ for(i=0;i<ix;i++) x += kconv*fCellSizeX[i]; // sum up to cell ix-1
+ xl = x;
+ x += kconv*fCellSizeX[ix];
+ xu = x;
+ for(j=0;j<iz;j++) z += kconv*fCellSizeZ[j]; // sum up cell iz-1
+ zl = z;
+ z += kconv*fCellSizeZ[iz];
+ zu = z;
+ return; // Found x and z, return.
+}
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