* about the suitability of this software for any purpose. It is *
* provided "as is" without express or implied warranty. *
**************************************************************************/
-
+#include <Riostream.h>
+#include <TF1.h>
#include <TMath.h>
-#include "AliITSgeom.h"
#include "AliITSsegmentationSDD.h"
#include "AliITS.h"
+#include "AliITSgeom.h"
+#include "AliITSgeomSDD.h"
#include "AliRun.h"
-
-class AliITS;
+#include "AliITSresponse.h"
ClassImp(AliITSsegmentationSDD)
-//------------------------------
-AliITSsegmentationSDD::AliITSsegmentationSDD(AliITSgeom* geom, AliITSresponse *resp){
+//----------------------------------------------------------------------
+AliITSsegmentationSDD::AliITSsegmentationSDD(AliITSgeom* geom,
+ AliITSresponse *resp){
// constructor
fGeom=geom;
- fResponse=resp;
+ fDriftSpeed=resp->DriftSpeed();
fCorr=0;
SetDetSize();
SetPadSize();
SetNPads();
}
-//_____________________________________________________________________________
+//______________________________________________________________________
AliITSsegmentationSDD::AliITSsegmentationSDD(){
// standard constructor
fGeom=0;
- fResponse=0;
+ fDriftSpeed=0;
fCorr=0;
SetDetSize();
SetPadSize();
SetNPads();
}
-//_____________________________________________________________________________
-AliITSsegmentationSDD& AliITSsegmentationSDD::operator=(AliITSsegmentationSDD &source){
- // Operator =
- if(this==&source) return *this;
- this->fNsamples = source.fNsamples;
- this->fNanodes = source.fNanodes;
- this->fPitch = source.fPitch;
- this->fTimeStep = source.fTimeStep;
- this->fDx = source.fDx;
- this->fDz = source.fDz;
- this->fDy = source.fDy;
- this->fCorr = new TF1(*(source.fCorr));
- this->fGeom = source.fGeom; // Just copy the pointer
- this->fResponse = source.fResponse; //Just copy the pointer
- return *this;
-}
-//___________________________________________________________________________
-AliITSsegmentationSDD::AliITSsegmentationSDD(AliITSsegmentationSDD &source){
- // Copy constructor
- *this = source;
-}
-//------------------------------
+//----------------------------------------------------------------------
void AliITSsegmentationSDD::Init(){
// Standard initilisation routine
if(!fGeom) {
- fGeom = ((AliITS*)gAlice->GetModule("ITS"))->GetITSgeom();
+ return;
+ //fGeom = ((AliITS*)gAlice->GetModule("ITS"))->GetITSgeom();
}
AliITSgeomSDD *gsdd = (AliITSgeomSDD *) (fGeom->GetShape(3,1,1));
fDy = 2.*kconv*gsdd->GetDy();
}
-//------------------------------
+//----------------------------------------------------------------------
void AliITSsegmentationSDD::
-Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[4], Int_t Zlist[4]){
- // returns neighbers for use in Cluster Finder routines and the like
+Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]){
+ // returns neighbours for use in Cluster Finder routines and the like
if(iX >= fNanodes) printf("iX > fNanodes %d %d\n",iX,fNanodes);
if(iZ >= fNsamples) printf("iZ > fNsamples %d %d\n",iZ,fNsamples);
*Nlist=4;
Xlist[0]=Xlist[1]=iX;
- if(iX) Xlist[2]=iX-1;
+ if(iX && (iX != fNanodes/2)) Xlist[2]=iX-1;
else Xlist[2]=iX;
- if (iX < fNanodes) Xlist[3]=iX+1;
+ if ((iX !=fNanodes/2 -1) && (iX != fNanodes)) Xlist[3]=iX+1;
else Xlist[3]=iX;
if(iZ) Zlist[0]=iZ-1;
else Zlist[0]=iZ;
if (iZ < fNsamples) Zlist[1]=iZ+1;
else Zlist[1]=iZ;
Zlist[2]=Zlist[3]=iZ;
-
}
-//------------------------------
-void AliITSsegmentationSDD::GetPadIxz(Float_t x,Float_t z,Int_t &timebin,Int_t &anode){
-// Returns cell coordinates (time sample,anode) for given real local coordinates (x,z)
+//----------------------------------------------------------------------
+void AliITSsegmentationSDD::GetPadIxz(Float_t x,Float_t z,
+ Int_t &timebin,Int_t &anode){
+// Returns cell coordinates (time sample,anode) incremented by 1 !!!!!
+// for given real local coordinates (x,z)
// expects x, z in cm
const Float_t kconv=10000; // cm->um
- Float_t speed=fResponse->DriftSpeed();
+ x *= kconv; // Convert to microns
+ z *= kconv; // Convert to microns
Int_t na = fNanodes/2;
- Float_t driftpath=fDx-TMath::Abs(kconv*x);
- timebin=(Int_t)(driftpath/speed/fTimeStep);
- anode=(Int_t)(kconv*z/fPitch) + na/2;
+ Float_t driftpath=fDx-TMath::Abs(x);
+ timebin=(Int_t)(driftpath/fDriftSpeed/fTimeStep);
+ anode=(Int_t)(z/fPitch + na/2);
if (x > 0) anode += na;
timebin+=1;
anode+=1;
}
-
-//------------------------------
-void AliITSsegmentationSDD::GetPadCxz(Int_t timebin,Int_t anode,Float_t &x ,Float_t &z){
+//----------------------------------------------------------------------
+void AliITSsegmentationSDD::GetPadCxz(Int_t timebin,Int_t anode,
+ Float_t &x ,Float_t &z){
// Transform from cell to real local coordinates
-
// returns x, z in cm
+ // the +0.5 means that an # and time bin # should start from 0 !!!
const Float_t kconv=10000; // um->cm
+ // the +0.5 means that an # and time bin # should start from 0 !!!
- Float_t speed=fResponse->DriftSpeed();
Int_t na = fNanodes/2;
- Float_t driftpath=(timebin+1)*fTimeStep*speed;
+ Float_t driftpath=(timebin+0.5)*fTimeStep*fDriftSpeed;
if (anode >= na) x=(fDx-driftpath)/kconv;
else x = -(fDx-driftpath)/kconv;
if (anode >= na) anode-=na;
- z=((anode+1)*fPitch-fDz/2)/kconv;
+ z=((anode+0.5)*fPitch-fDz/2)/kconv;
}
-
-//------------------------------
+//----------------------------------------------------------------------
void AliITSsegmentationSDD::GetPadTxz(Float_t &x,Float_t &z){
// Get anode and time bucket as floats - numbering from 0
const Float_t kconv=10000; // cm->um
- Float_t speed=fResponse->DriftSpeed();
+ Float_t x0=x;
Int_t na = fNanodes/2;
Float_t driftpath=fDx-TMath::Abs(kconv*x);
- x=driftpath/speed/fTimeStep;
+ x=driftpath/fDriftSpeed/fTimeStep;
z=kconv*z/fPitch + (float)na/2;
- if (x > 0) x += (float)na;
+ if (x0 < 0) x = -x;
}
-//------------------------------
+//----------------------------------------------------------------------
void AliITSsegmentationSDD::GetLocal(Int_t module,Float_t *g ,Float_t *l){
// returns local coordinates from global
if(!fGeom) {
- fGeom = ((AliITS*)gAlice->GetModule("ITS"))->GetITSgeom();
+ return;
+ //fGeom = ((AliITS*)gAlice->GetModule("ITS"))->GetITSgeom();
}
fGeom->GtoL(module,g,l);
}
-//------------------------------
+//----------------------------------------------------------------------
void AliITSsegmentationSDD::GetGlobal(Int_t module,Float_t *l ,Float_t *g){
// return global coordinates from local
if(!fGeom) {
- fGeom = ((AliITS*)gAlice->GetModule("ITS"))->GetITSgeom();
+ return;
+ //fGeom = ((AliITS*)gAlice->GetModule("ITS"))->GetITSgeom();
}
fGeom->LtoG(module,l,g);
}
+//----------------------------------------------------------------------
+void AliITSsegmentationSDD::Print(Option_t *opt) const {
+ // Print SDD segmentation Parameters
+
+ cout << "**************************************************" << endl;
+ cout << " Silicon Drift Detector Segmentation Parameters " << endl;
+ cout << "**************************************************" << endl;
+ cout << "Number of Time Samples: " << fNsamples << endl;
+ cout << "Number of Anodes: " << fNanodes << endl;
+ cout << "Time Step (ns): " << fTimeStep << endl;
+ cout << "Anode Pitch (um): " << fPitch << endl;
+ cout << "Full Detector Width (x): " << fDx << endl;
+ cout << "Half Detector Length (z): " << fDz << endl;
+ cout << "Full Detector Thickness (y): " << fDy << endl;
+ cout << "**************************************************" << endl;
+
+}
+//______________________________________________________________________
+
+//______________________________________________________________________
+void AliITSsegmentationSDD::LocalToDet(Float_t x,Float_t z,Int_t &ix,Int_t &iz){
+// Transformation from Geant detector centered local coordinates (cm) to
+// time bucket numbers ix and anode number 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 time coordinate. Has the range 0<=ix<fNsamples.
+// Int_t iz detector z anode coordinate. Has the range 0<=iz<fNandoes.
+// A value of -1 for ix or iz indecates that this point is outside of the
+// detector segmentation as defined.
+// This segmentation geometry can be discribed as the following:
+// {assumes 2*Dx()=7.0cm Dz()=7.5264cm, Dpx()=25ns,
+// res->DeriftSpeed()=7.3mic/ns, Dpz()=512. For other values a only the
+// specific numbers will change not their layout.}
+//
+// 0 191 0
+// 0 |----------------------|---------------------| 256
+// | a time-bins | time-bins a |
+// | n | n |
+// | o |___________________o_|__> X
+// | d | d |
+// | e | e |
+// | s | s |
+// 255 |----------------------|---------------------| 511
+// |
+// V
+// Z
+ Float_t dx,dz,tb;
+ const Float_t kconv = 1.0E-04; // converts microns to cm.
+
+ ix = -1; // default values
+ iz = -1; // default values
+ dx = -kconv*Dx(); // lower left edge in cm.
+ dz = -0.5*kconv*Dz(); // lower left edge in cm.
+ if(x<dx || x>-dx) return; // outside of defined volume.
+ if(z<dz || z>-dz) return; // outside of defined volume.
+ tb = fDriftSpeed*fTimeStep*kconv; // compute size of time bin.
+ if(x>0) dx = -(dx + x)/tb; // distance from + side in time bin units
+ else dx = (x - dx)/tb; // distance from - side in time bin units
+ dz = (z - dz)/(kconv*fPitch); // distance in z in anode pitch units
+ ix = (Int_t) dx; // time bin
+ iz = (Int_t) dz; // anode
+ if(x>0) iz += Npz()/2; // if x>0 then + side anodes values.
+ return; // Found ix and iz, return.
+}
+//______________________________________________________________________
+void AliITSsegmentationSDD::DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z)
+{
+// Transformation from Detector time bucket and anode coordiantes to Geant
+// detector centerd local coordinates (cm).
+// Input:
+// Int_t ix detector x time coordinate. Has the range 0<=ix<fNsamples.
+// Int_t iz detector z anode coordinate. Has the range 0<=iz<fNandoes.
+// 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 -Dx()
+// or -0.5*Dz() is returned.
+// This segmentation geometry can be discribed as the following:
+// {assumes 2*Dx()=7.0cm Dz()=7.5264cm, Dpx()=25ns,
+// res->DeriftSpeed()=7.3mic/ns, Dpz()=512. For other values a only the
+// specific numbers will change not their layout.}
+//
+// 0 191 0
+// 0 |----------------------|---------------------| 256
+// | a time-bins | time-bins a |
+// | n | n |
+// | o |___________________o_|__> X
+// | d | d |
+// | e | e |
+// | s | s |
+// 255 |----------------------|---------------------| 511
+// |
+// V
+// Z
+ Int_t i,j;
+ Float_t tb;
+ const Float_t kconv = 1.0E-04; // converts microns to cm.
+
+ if(iz>=Npz()/2) x = kconv*Dx(); // default value for +x side.
+ else x = -kconv*Dx(); // default value for -x side.
+ 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
+ tb = fDriftSpeed*fTimeStep*kconv; // compute size of time bin.
+ if(iz>=Npz()/2) tb *= -1.0; // for +x side decrement frmo Dx().
+ for(i=0;i<ix;i++) x += tb; // sum up to cell ix-1
+ x += 0.5*tb; // add 1/2 of cell ix for center location.
+ if(iz>=Npz()/2) iz -=Npz()/2;// If +x side don't count anodes from -x side.
+ for(j=0;j<iz;j++) z += kconv*fPitch; // sum up cell iz-1
+ z += 0.5*kconv*fPitch; // add 1/2 of cell iz for center location.
+ return; // Found x and z, return.
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff