**************************************************************************/
#include <TMath.h>
+#include <TF1.h>
#include "AliITSsegmentationSPD.h"
+#include "AliITSgeom.h"
ClassImp(AliITSsegmentationSPD)
return 300.0;
}
//_____________________________________________________________________________
-Float_t ColFromZ(Float_t z) {
+Float_t AliITSsegmentationSPD::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
} else if( z < 83600) {
col = 161 + (z - 70425)/pitchz;
}
- return col;
+ return TMath::Abs(col);
}
//_____________________________________________________________________________
-Float_t ZFromCol(Int_t col) {
+Float_t AliITSsegmentationSPD::ZFromCol(Int_t col) {
// same comments as above
// Get z-coordinate for each colunm number
z = 69175 + (col -159 + 0.5)*pitchz;
} else if( col >= 161 && col <= 191) {
z = 70425 + (col -161 + 0.5)*pitchz;
- }
+ }
return z;
}
-
-Float_t ZpitchFromCol(Int_t col) {
+//______________________________________________________________________
+Float_t AliITSsegmentationSPD::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 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 = 0.0;
+ }
+ return pitchz;
}
-
+//______________________________________________________________________
AliITSsegmentationSPD::AliITSsegmentationSPD(){
// Default constructor
fNpx = 0;
fGeom = 0;
}
-//____________________________________________________________________________
+//______________________________________________________________________
AliITSsegmentationSPD::AliITSsegmentationSPD(AliITSgeom *gm){
// Constructor
fCorr=0;
fGeom = gm;
}
-//____________________________________________________________________________
+//______________________________________________________________________
AliITSsegmentationSPD& AliITSsegmentationSPD::operator=(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;
+ Int_t i;
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
// 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
// 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
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
return ZpitchFromCol(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){
// 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){
+// 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){
// Transform from pixel to real local coordinates
// returns x, z in microns
Xlist[7]=iX+1;
Zlist[7]=iZ-1;
}
+//______________________________________________________________________
+void AliITSsegmentationSPD::LocalToDet(Float_t x,Float_t z,Int_t &ix,Int_t &iz){
+// 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.
+// 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; // outside x range.
+ if(z<dz) return; // outside z range.
+ for(i=0;i<Npx();i++){
+ dx += kconv*fCellSizeX[i];
+ if(x<dx) break;
+ } // end for i
+ if(i>=Npx()) return; // outside x range.
+ for(j=0;j<Npz();j++){
+ dz += kconv*fCellSizeZ[j];
+ if(z<dz) break;
+ } // end for j
+ if(j>=Npz()) return; // outside z range.
+ ix = i;
+ iz = j;
+ return; // Found ix and iz, return.
+}
+//______________________________________________________________________
+void AliITSsegmentationSPD::DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z)
+{
+// 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.
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff