[u/mrichter/AliRoot.git] / ITS / AliITSsegmentationSDD.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/
#include <Riostream.h>
#include <TMath.h>
#include <TGeoManager.h>
#include <TGeoVolume.h>
#include <TGeoBBox.h>
#include "AliITSsegmentationSDD.h"
#include "AliITSgeomSDD.h"
#include "AliITSresponseSDD.h"

/////////////////////////////////////////////////////////////////////////////
// Segmentation class for drift detectors                                  //
//                                                                         //
//     microcables                                  microcables            //
//       /\                                           /\                   //
//       ||                                           ||                   //
//       ||                                           ||                   //
//       ||                                           ||                   //
//        0                     256                    0                   //
//      0 |----------------------|---------------------| 511               //
//        |       time-bins      |     time-bins       |                   //
//        | a                    |                   a |                   //
//        | n                    |                   n |                   //
//    X <_|_o____________________|___________________o_|__                 //
//        | d                    |                   d |                   //
//        | e     LEFT SIDE      |   RIGHT SIDE      e |                   //
//        | s     CHANNEL 0      |   CHANNEL 1       s |                   //
//        |       Xlocal > 0     |   Xlocal < 0        |                   //
//    255 |----------------------|---------------------| 256               //
//                               |                                         //
//                               |                                         //
//                               V                                         //
//                               Z                                         //
/////////////////////////////////////////////////////////////////////////////

/* $Id$ */

const Float_t AliITSsegmentationSDD::fgkDxDefault = 35085.;
const Float_t AliITSsegmentationSDD::fgkDzDefault = 75264.;
const Float_t AliITSsegmentationSDD::fgkDyDefault = 300.;
const Float_t AliITSsegmentationSDD::fgkPitchDefault = 294.;
const Float_t AliITSsegmentationSDD::fgkClockDefault = 40.;
const Int_t AliITSsegmentationSDD::fgkHalfNanodesDefault = 256; 
const Int_t AliITSsegmentationSDD::fgkNsamplesDefault = 256;
const Int_t AliITSsegmentationSDD::fgkNchipsPerHybrid = 4;
const Int_t AliITSsegmentationSDD::fgkNanodesPerChip = 64;
const Float_t AliITSsegmentationSDD::fgkCm2Micron = 10000.;
const Float_t AliITSsegmentationSDD::fgkMicron2Cm = 1.0E-04;
ClassImp(AliITSsegmentationSDD)
//----------------------------------------------------------------------
AliITSsegmentationSDD::AliITSsegmentationSDD(AliITSgeom* geom):
AliITSsegmentation(),
fNsamples(0),
fNanodes(0),
fPitch(0),
fTimeStep(0),
fDriftSpeed(0),
fSetDriftSpeed(0){
  // constructor
  InitFromGeom(geom);
}
//______________________________________________________________________
AliITSsegmentationSDD::AliITSsegmentationSDD(Option_t *opt) : AliITSsegmentation(),
fNsamples(0),
fNanodes(0),
fPitch(0),
fTimeStep(0),
fDriftSpeed(0),
fSetDriftSpeed(0){
  // Default constructor
  Init();
  if(strstr(opt,"TGeo")){
    if(!gGeoManager){
      AliError("Geometry is not initialized\n");
      return;
    }
    TGeoVolume *v=NULL;
    v = gGeoManager->GetVolume("ITSsddSensitivL3");
    if(!v){
      AliWarning("TGeo volume ITSsddSensitivL3 not found (hint: use v11Hybrid geometry)\n Using hardwired default values"); 
    }
    else {
      TGeoBBox *s=(TGeoBBox*)v->GetShape();
      SetDetSize(s->GetDX()*10000.,s->GetDZ()*20000.,s->GetDY()*20000.);
    }
  }
}

//______________________________________________________________________
void AliITSsegmentationSDD::Copy(TObject &obj) const {
  // protected method. copy this to obj
  AliITSsegmentation::Copy(obj);
  ((AliITSsegmentationSDD& ) obj).fNsamples = fNsamples;
  ((AliITSsegmentationSDD& ) obj).fNanodes = fNanodes;
  ((AliITSsegmentationSDD& ) obj).fPitch = fPitch;
  ((AliITSsegmentationSDD& ) obj).fTimeStep = fTimeStep;
  ((AliITSsegmentationSDD& ) obj).fDriftSpeed = fDriftSpeed;
  ((AliITSsegmentationSDD& ) obj).fSetDriftSpeed = fSetDriftSpeed;
}

//______________________________________________________________________
AliITSsegmentationSDD& AliITSsegmentationSDD::operator=(const AliITSsegmentationSDD &source){
   // = operator
   if(this==&source) return *this;
   source.Copy(*this);
   return *this;
}

//____________________________________________________________________________
AliITSsegmentationSDD::AliITSsegmentationSDD(const AliITSsegmentationSDD &source) :
    AliITSsegmentation(source),
fNsamples(0),
fNanodes(0),
fPitch(0),
fTimeStep(0),
fDriftSpeed(0),
fSetDriftSpeed(0){
  // copy constructor
  source.Copy(*this);
}

//----------------------------------------------------------------------
void AliITSsegmentationSDD::Init(){
// Standard initilisation routine
   fDriftSpeed=AliITSresponseSDD::DefaultDriftSpeed();
   fCorr=0;
   SetDetSize(fgkDxDefault,fgkDzDefault,fgkDyDefault);
   SetPadSize(fgkPitchDefault,fgkClockDefault);
   SetNPads(fgkHalfNanodesDefault,fgkNsamplesDefault);
}
//----------------------------------------------------------------------
void AliITSsegmentationSDD::InitFromGeom(AliITSgeom *geom){
// Inizialization from geometry
  Init();
  if(!geom) {
    AliFatal("Pointer to ITS geometry class (AliITSgeom) is null\n");
    return;
  }
  AliITSgeomSDD *gsdd = (AliITSgeomSDD *) (geom->GetShape(3,1,1));
  
  fDz = 2.*fgkCm2Micron*gsdd->GetDz();
  fDx = fgkCm2Micron*gsdd->GetDx();
  fDy = 2.*fgkCm2Micron*gsdd->GetDy();
 
}

//----------------------------------------------------------------------
void AliITSsegmentationSDD::
Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]) const {
  // 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 && (iX != fNanodes/2)) Xlist[2]=iX-1;
    else Xlist[2]=iX;
    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;
}
//----------------------------------------------------------------------
Float_t AliITSsegmentationSDD::GetAnodeFromLocal(Float_t xloc,Float_t zloc) const {
  // returns anode coordinate (as float) starting from local coordinates
  Float_t xAnode=zloc*fgkCm2Micron/fPitch;
  if(xloc>0){   // left side (anodes 0-255, anode 0 at zloc<0)
    xAnode+=(Float_t)fNanodes/4;
  }else{ // right side (anodes 256-511, anode 0 at zloc>0)
    xAnode=3*fNanodes/4-xAnode;
  }
  return xAnode;
}

//----------------------------------------------------------------------
Float_t AliITSsegmentationSDD::GetLocalZFromAnode(Int_t nAnode) const{
  // returns local Z coordinate from anode number (integer)
  Float_t zAnode=(Float_t)nAnode+0.5;
  return GetLocalZFromAnode(zAnode);
}

//----------------------------------------------------------------------
Float_t AliITSsegmentationSDD::GetLocalZFromAnode(Float_t zAnode) const{
  // returns local Z coordinate from anode number (float)
  Float_t zloc=0.;
  if(zAnode<fNanodes/2){ // left side
    zloc=(zAnode*fPitch-fDz/2)*fgkMicron2Cm;
  }else{  // right side
    zAnode-=fNanodes/2;
    zloc=-(zAnode*fPitch-fDz/2)*fgkMicron2Cm;
  }
  return zloc;
}
//----------------------------------------------------------------------
Int_t AliITSsegmentationSDD::GetChipFromChannel(Int_t ix, Int_t iz) const {
  // returns chip number (in range 0-7) starting from channel number
  if(iz>=fNanodes  || iz<0 || ix>fNsamples){
    AliError("Bad cell number");
    return -1;
  }
  Int_t theChip=iz/fgkNanodesPerChip;
  return theChip;
}
//----------------------------------------------------------------------
Int_t AliITSsegmentationSDD::GetChipFromLocal(Float_t xloc, Float_t zloc) const {  
  // returns chip number (in range 0-7) starting from local coordinates
  Float_t detsize=fDz*fgkMicron2Cm;
  Float_t chipsize=detsize/(Float_t)fgkNchipsPerHybrid;
  zloc+=detsize/2.;
  if(zloc<-0.01 || zloc>detsize+0.01){ // 100 micron tolerance around edges
    AliError("Z local value out of sensitive SDD area");
    return -1;
  }
  Int_t iChip=int(zloc/chipsize);
  if(zloc<0.) iChip=0;  
  if(zloc>=detsize) iChip=fgkNchipsPerHybrid-1;
  if(iChip>=fgkNchipsPerHybrid || iChip<0){ 
    AliError(Form("Bad chip number %d",iChip));
    return -1;
  }
  Int_t iSide=GetSideFromLocalX(xloc);
  if(iSide==1) iChip=fgkNchipsPerHybrid-iChip+3;   // i.e. 7-iChip
  return iChip;
}
//----------------------------------------------------------------------
void AliITSsegmentationSDD::GetPadIxz(Float_t x,Float_t z,
				      Int_t &timebin,Int_t &anode) const {
// Returns cell coordinates (time sample,anode)
// for given real local coordinates (x,z)

  // expects x, z in cm

  Float_t driftpath=fDx-TMath::Abs(x*fgkCm2Micron);
  timebin=(Int_t)(driftpath/fDriftSpeed/fTimeStep);
  anode=(Int_t)GetAnodeFromLocal(x,z);
  if(!fSetDriftSpeed){
    timebin=-999;
    AliWarning("Drift speed not set: timebin is dummy");
  }

}
//----------------------------------------------------------------------
void AliITSsegmentationSDD::GetPadCxz(Int_t timebin,Int_t anode,
				      Float_t &x ,Float_t &z) const{
  // 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 !!! 
  // the +0.5 means that an # and time bin # should start from 0 !!! 

  Float_t driftpath=GetDriftTimeFromTb(timebin)*fDriftSpeed;
  if (anode < fNanodes/2){ // left side, positive x
    x=(fDx-driftpath)*fgkMicron2Cm;
  }else{ // right side, negative x
    x = -(fDx-driftpath)*fgkMicron2Cm;
  }
  z=GetLocalZFromAnode(anode);
  if(!fSetDriftSpeed){
    x=-9999.;
    AliWarning("Drift speed not set: x coord. is dummy");
  }
}
//----------------------------------------------------------------------
void AliITSsegmentationSDD::GetPadTxz(Float_t &x,Float_t &z) const{
    // Get anode and time bucket as floats - numbering from 0

    // expects x, z in cm

    Float_t xloc=x;
    Float_t zloc=z;
    Float_t driftpath=fDx-TMath::Abs(fgkCm2Micron*xloc);
    x=driftpath/fDriftSpeed/fTimeStep;
    if (xloc < 0) x = -x;
    z=GetAnodeFromLocal(xloc,zloc);
    if(!fSetDriftSpeed){
      x=-9999.;
      AliWarning("Drift speed not set: x coord. is dummy");
    }
}
//----------------------------------------------------------------------
void AliITSsegmentationSDD::Print(Option_t *opt) const {
  // Print SDD segmentation Parameters

   cout << "**************************************************" << endl;
   cout << "  Silicon Drift Detector Segmentation Parameters  " << opt << 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;
   cout<<" (Default is "<<fgkDxDefault<<") "<<endl;
   cout << "Half Detector Length    (z): " << fDz;
   cout<<" (Default is "<<fgkDzDefault<<") "<<endl;
   cout << "Full Detector Thickness (y): " << fDy;
   cout<<" (Default is "<<fgkDyDefault<<") "<<endl;
   cout << "**************************************************" << endl;

}

//----------------------------------------------------------------------
void AliITSsegmentationSDD::PrintDefaultParameters() const {
  // print SDD parameters defined as static const data members

  cout << "**************************************************" << endl;
  cout << "  Silicon Drift Detector Segmentation Parameters  " << endl;
  cout << " Default values defined as static const data members"<< endl;
  cout << " Actual values can be set with the relevant setters"<< endl; 
  cout << "**************************************************" << endl;
  cout<<"fgkDxDefault = "<<fgkDxDefault<<endl;
  cout<<"fgkDzDefault = "<<fgkDzDefault<<endl;
  cout<<"fgkDyDefault = "<<fgkDyDefault<<endl;
  cout<<"fgkPitchDefault = "<<fgkPitchDefault<<endl;
  cout<<"fgkClockDefault = "<<fgkClockDefault<<endl;
  cout<<"fgkHalfNanodesDefault = "<<fgkHalfNanodesDefault<<endl;
  cout<<"fgkNsamplesDefault = "<<fgkNsamplesDefault<<endl;
  cout << "**************************************************" << endl;

}

//______________________________________________________________________
Bool_t AliITSsegmentationSDD::LocalToDet(Float_t x,Float_t z,
                                         Int_t &ix,Int_t &iz) const {
// 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.

    Float_t dx,dz;

    ix = -1; // default values
    iz = -1; // default values
    dx = -fgkMicron2Cm*Dx(); // lower left edge in cm.
    dz = -0.5*fgkMicron2Cm*Dz(); // lower left edge in cm.
    if(x<dx || x>-dx) {
      AliWarning(Form("Input argument %f out of range (%f, %f)",x,dx,-dx));
      return kFALSE; // outside of defined volume.
    }
    if(z<dz || z>-dz) {
      AliWarning(Form("Input argument %f out of range (%f, %f)",z,dz,-dz));
      return kFALSE; // outside of defined volume.
    }
    GetPadIxz(x,z,ix,iz);
    if(!fSetDriftSpeed){
      ix=-999;
      AliWarning("Drift speed not set: timebin is dummy");
      return kFALSE;
    }
    return kTRUE; // Found ix and iz, return.
}
//______________________________________________________________________
void AliITSsegmentationSDD::DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z) const
{
// 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.

  x=-Dx();
  z=-0.5*Dz();
  if(ix<0 || ix>=Npx()) {
    AliWarning(Form("Input argument %d out of range (0, %d)",ix,Npx()));
    return; // outside of detector
  }
  if(iz<0 || iz>=Npz()) {
    AliWarning(Form("Input argument %d out of range (0, %d)",iz,Npz()));
    return; // outside of detctor
  }
  GetPadCxz(ix,iz,x,z);
  if(!fSetDriftSpeed){
    x=-9999.;
    AliWarning("Drift speed not set: x coord. is dummy");
  }
  return; // Found x and z, return.
}
Commit	Line	Data
b0f5e3fc	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
4ae5bbc4	15	#include <Riostream.h>
b0f5e3fc	16	#include <TMath.h>
c9649d1e	17	#include <TGeoManager.h>
	18	#include <TGeoVolume.h>
	19	#include <TGeoBBox.h>
b0f5e3fc	20	#include "AliITSsegmentationSDD.h"
d953664a	21	#include "AliITSgeomSDD.h"
fcf95fc7	22	#include "AliITSresponseSDD.h"
f6b6d58e	23
	24	/////////////////////////////////////////////////////////////////////////////
	25	// Segmentation class for drift detectors //
	26	// //
	27	// microcables microcables //
	28	// /\ /\ //
	29	// \|\| \|\| //
	30	// \|\| \|\| //
	31	// \|\| \|\| //
	32	// 0 256 0 //
	33	// 0 \|----------------------\|---------------------\| 511 //
	34	// \| time-bins \| time-bins \| //
	35	// \| a \| a \| //
	36	// \| n \| n \| //
	37	// X <_\|_o____________________\|___________________o_\|__ //
	38	// \| d \| d \| //
	39	// \| e LEFT SIDE \| RIGHT SIDE e \| //
	40	// \| s CHANNEL 0 \| CHANNEL 1 s \| //
	41	// \| Xlocal > 0 \| Xlocal < 0 \| //
	42	// 255 \|----------------------\|---------------------\| 256 //
	43	// \| //
	44	// \| //
	45	// V //
	46	// Z //
	47	/////////////////////////////////////////////////////////////////////////////
55d2c544	48
c9649d1e	49	/* $Id$ */
214b9c8f	50
55d2c544	51	const Float_t AliITSsegmentationSDD::fgkDxDefault = 35085.;
	52	const Float_t AliITSsegmentationSDD::fgkDzDefault = 75264.;
	53	const Float_t AliITSsegmentationSDD::fgkDyDefault = 300.;
	54	const Float_t AliITSsegmentationSDD::fgkPitchDefault = 294.;
	55	const Float_t AliITSsegmentationSDD::fgkClockDefault = 40.;
	56	const Int_t AliITSsegmentationSDD::fgkHalfNanodesDefault = 256;
	57	const Int_t AliITSsegmentationSDD::fgkNsamplesDefault = 256;
d24bc9d6	58	const Int_t AliITSsegmentationSDD::fgkNchipsPerHybrid = 4;
d24bc9d6	59	const Int_t AliITSsegmentationSDD::fgkNanodesPerChip = 64;
f6b6d58e	60	const Float_t AliITSsegmentationSDD::fgkCm2Micron = 10000.;
f6b6d58e	61	const Float_t AliITSsegmentationSDD::fgkMicron2Cm = 1.0E-04;
b0f5e3fc	62	ClassImp(AliITSsegmentationSDD)
2a4239d3	63	//----------------------------------------------------------------------
4952f440	64	AliITSsegmentationSDD::AliITSsegmentationSDD(AliITSgeom* geom):
d24bc9d6	65	AliITSsegmentation(),
e56160b8	66	fNsamples(0),
	67	fNanodes(0),
	68	fPitch(0),
	69	fTimeStep(0),
4952f440	70	fDriftSpeed(0),
4952f440	71	fSetDriftSpeed(0){
b0f5e3fc	72	// constructor
d24bc9d6	73	InitFromGeom(geom);
b0f5e3fc	74	}
2a4239d3	75	//______________________________________________________________________
c9649d1e	76	AliITSsegmentationSDD::AliITSsegmentationSDD(Option_t *opt) : AliITSsegmentation(),
e56160b8	77	fNsamples(0),
	78	fNanodes(0),
	79	fPitch(0),
	80	fTimeStep(0),
4952f440	81	fDriftSpeed(0),
4952f440	82	fSetDriftSpeed(0){
55d2c544	83	// Default constructor
d24bc9d6	84	Init();
c9649d1e	85	if(strstr(opt,"TGeo")){
	86	if(!gGeoManager){
	87	AliError("Geometry is not initialized\n");
	88	return;
	89	}
	90	TGeoVolume *v=NULL;
	91	v = gGeoManager->GetVolume("ITSsddSensitivL3");
	92	if(!v){
	93	AliWarning("TGeo volume ITSsddSensitivL3 not found (hint: use v11Hybrid geometry)\n Using hardwired default values");
	94	}
	95	else {
	96	TGeoBBox s=(TGeoBBox)v->GetShape();
	97	SetDetSize(s->GetDX()10000.,s->GetDZ()20000.,s->GetDY()*20000.);
	98	}
	99	}
55d2c544	100	}
b0f5e3fc	101
55d2c544	102	//______________________________________________________________________
	103	void AliITSsegmentationSDD::Copy(TObject &obj) const {
	104	// protected method. copy this to obj
	105	AliITSsegmentation::Copy(obj);
	106	((AliITSsegmentationSDD& ) obj).fNsamples = fNsamples;
	107	((AliITSsegmentationSDD& ) obj).fNanodes = fNanodes;
	108	((AliITSsegmentationSDD& ) obj).fPitch = fPitch;
	109	((AliITSsegmentationSDD& ) obj).fTimeStep = fTimeStep;
	110	((AliITSsegmentationSDD& ) obj).fDriftSpeed = fDriftSpeed;
4952f440	111	((AliITSsegmentationSDD& ) obj).fSetDriftSpeed = fSetDriftSpeed;
b0f5e3fc	112	}
55d2c544	113
	114	//______________________________________________________________________
	115	AliITSsegmentationSDD& AliITSsegmentationSDD::operator=(const AliITSsegmentationSDD &source){
	116	// = operator
	117	if(this==&source) return *this;
	118	source.Copy(*this);
	119	return *this;
	120	}
	121
	122	//____________________________________________________________________________
	123	AliITSsegmentationSDD::AliITSsegmentationSDD(const AliITSsegmentationSDD &source) :
e56160b8	124	AliITSsegmentation(source),
	125	fNsamples(0),
	126	fNanodes(0),
	127	fPitch(0),
	128	fTimeStep(0),
4952f440	129	fDriftSpeed(0),
4952f440	130	fSetDriftSpeed(0){
55d2c544	131	// copy constructor
	132	source.Copy(*this);
	133	}
	134
2a4239d3	135	//----------------------------------------------------------------------
b0f5e3fc	136	void AliITSsegmentationSDD::Init(){
d24bc9d6	137	// Standard initilisation routine
	138	fDriftSpeed=AliITSresponseSDD::DefaultDriftSpeed();
	139	fCorr=0;
	140	SetDetSize(fgkDxDefault,fgkDzDefault,fgkDyDefault);
	141	SetPadSize(fgkPitchDefault,fgkClockDefault);
	142	SetNPads(fgkHalfNanodesDefault,fgkNsamplesDefault);
	143	}
	144	//----------------------------------------------------------------------
	145	void AliITSsegmentationSDD::InitFromGeom(AliITSgeom *geom){
	146	// Inizialization from geometry
	147	Init();
	148	if(!geom) {
	149	AliFatal("Pointer to ITS geometry class (AliITSgeom) is null\n");
	150	return;
	151	}
	152	AliITSgeomSDD gsdd = (AliITSgeomSDD ) (geom->GetShape(3,1,1));
	153
	154	fDz = 2.fgkCm2Microngsdd->GetDz();
	155	fDx = fgkCm2Micron*gsdd->GetDx();
	156	fDy = 2.fgkCm2Microngsdd->GetDy();
	157
b0f5e3fc	158	}
b0f5e3fc	159
2a4239d3	160	//----------------------------------------------------------------------
b0f5e3fc	161	void AliITSsegmentationSDD::
55d2c544	162	Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]) const {
314ba410	163	// returns neighbours for use in Cluster Finder routines and the like
b0f5e3fc	164
e8189707	165	if(iX >= fNanodes) printf("iX > fNanodes %d %d\n",iX,fNanodes);
e8189707	166	if(iZ >= fNsamples) printf("iZ > fNsamples %d %d\n",iZ,fNsamples);
b0f5e3fc	167	*Nlist=4;
b0f5e3fc	168	Xlist[0]=Xlist[1]=iX;
314ba410	169	if(iX && (iX != fNanodes/2)) Xlist[2]=iX-1;
b0f5e3fc	170	else Xlist[2]=iX;
314ba410	171	if ((iX !=fNanodes/2 -1) && (iX != fNanodes)) Xlist[3]=iX+1;
b0f5e3fc	172	else Xlist[3]=iX;
	173	if(iZ) Zlist[0]=iZ-1;
	174	else Zlist[0]=iZ;
	175	if (iZ < fNsamples) Zlist[1]=iZ+1;
	176	else Zlist[1]=iZ;
	177	Zlist[2]=Zlist[3]=iZ;
b0f5e3fc	178	}
2a4239d3	179	//----------------------------------------------------------------------
f6b6d58e	180	Float_t AliITSsegmentationSDD::GetAnodeFromLocal(Float_t xloc,Float_t zloc) const {
	181	// returns anode coordinate (as float) starting from local coordinates
	182	Float_t xAnode=zloc*fgkCm2Micron/fPitch;
	183	if(xloc>0){ // left side (anodes 0-255, anode 0 at zloc<0)
	184	xAnode+=(Float_t)fNanodes/4;
	185	}else{ // right side (anodes 256-511, anode 0 at zloc>0)
	186	xAnode=3*fNanodes/4-xAnode;
	187	}
	188	return xAnode;
	189	}
	190
	191	//----------------------------------------------------------------------
	192	Float_t AliITSsegmentationSDD::GetLocalZFromAnode(Int_t nAnode) const{
	193	// returns local Z coordinate from anode number (integer)
	194	Float_t zAnode=(Float_t)nAnode+0.5;
	195	return GetLocalZFromAnode(zAnode);
	196	}
	197
	198	//----------------------------------------------------------------------
	199	Float_t AliITSsegmentationSDD::GetLocalZFromAnode(Float_t zAnode) const{
	200	// returns local Z coordinate from anode number (float)
	201	Float_t zloc=0.;
	202	if(zAnode<fNanodes/2){ // left side
	203	zloc=(zAnodefPitch-fDz/2)fgkMicron2Cm;
	204	}else{ // right side
	205	zAnode-=fNanodes/2;
	206	zloc=-(zAnodefPitch-fDz/2)fgkMicron2Cm;
	207	}
	208	return zloc;
	209	}
	210	//----------------------------------------------------------------------
d24bc9d6	211	Int_t AliITSsegmentationSDD::GetChipFromChannel(Int_t ix, Int_t iz) const {
214b9c8f	212	// returns chip number (in range 0-7) starting from channel number
d24bc9d6	213	if(iz>=fNanodes \|\| iz<0 \|\| ix>fNsamples){
	214	AliError("Bad cell number");
	215	return -1;
	216	}
	217	Int_t theChip=iz/fgkNanodesPerChip;
	218	return theChip;
	219	}
	220	//----------------------------------------------------------------------
	221	Int_t AliITSsegmentationSDD::GetChipFromLocal(Float_t xloc, Float_t zloc) const {
214b9c8f	222	// returns chip number (in range 0-7) starting from local coordinates
d24bc9d6	223	Float_t detsize=fDz*fgkMicron2Cm;
	224	Float_t chipsize=detsize/(Float_t)fgkNchipsPerHybrid;
	225	zloc+=detsize/2.;
	226	if(zloc<-0.01 \|\| zloc>detsize+0.01){ // 100 micron tolerance around edges
	227	AliError("Z local value out of sensitive SDD area");
	228	return -1;
	229	}
	230	Int_t iChip=int(zloc/chipsize);
	231	if(zloc<0.) iChip=0;
	232	if(zloc>=detsize) iChip=fgkNchipsPerHybrid-1;
	233	if(iChip>=fgkNchipsPerHybrid \|\| iChip<0){
	234	AliError(Form("Bad chip number %d",iChip));
	235	return -1;
	236	}
	237	Int_t iSide=GetSideFromLocalX(xloc);
	238	if(iSide==1) iChip=fgkNchipsPerHybrid-iChip+3; // i.e. 7-iChip
	239	return iChip;
	240	}
	241	//----------------------------------------------------------------------
2a4239d3	242	void AliITSsegmentationSDD::GetPadIxz(Float_t x,Float_t z,
55d2c544	243	Int_t &timebin,Int_t &anode) const {
f6b6d58e	244	// Returns cell coordinates (time sample,anode)
03898a57	245	// for given real local coordinates (x,z)
b0f5e3fc	246
f6b6d58e	247	// expects x, z in cm
b0f5e3fc	248
f6b6d58e	249	Float_t driftpath=fDx-TMath::Abs(x*fgkCm2Micron);
	250	timebin=(Int_t)(driftpath/fDriftSpeed/fTimeStep);
	251	anode=(Int_t)GetAnodeFromLocal(x,z);
	252	if(!fSetDriftSpeed){
	253	timebin=-999;
	254	AliWarning("Drift speed not set: timebin is dummy");
	255	}
b0f5e3fc	256
b0f5e3fc	257	}
2a4239d3	258	//----------------------------------------------------------------------
2a4239d3	259	void AliITSsegmentationSDD::GetPadCxz(Int_t timebin,Int_t anode,
55d2c544	260	Float_t &x ,Float_t &z) const{
f6b6d58e	261	// Transform from cell to real local coordinates
f6b6d58e	262	// returns x, z in cm
b0f5e3fc	263
03898a57	264	// the +0.5 means that an # and time bin # should start from 0 !!!
03898a57	265	// the +0.5 means that an # and time bin # should start from 0 !!!
b0f5e3fc	266
f6b6d58e	267	Float_t driftpath=GetDriftTimeFromTb(timebin)*fDriftSpeed;
	268	if (anode < fNanodes/2){ // left side, positive x
	269	x=(fDx-driftpath)*fgkMicron2Cm;
	270	}else{ // right side, negative x
	271	x = -(fDx-driftpath)*fgkMicron2Cm;
	272	}
	273	z=GetLocalZFromAnode(anode);
	274	if(!fSetDriftSpeed){
	275	x=-9999.;
	276	AliWarning("Drift speed not set: x coord. is dummy");
	277	}
b0f5e3fc	278	}
2a4239d3	279	//----------------------------------------------------------------------
55d2c544	280	void AliITSsegmentationSDD::GetPadTxz(Float_t &x,Float_t &z) const{
e8189707	281	// Get anode and time bucket as floats - numbering from 0
	282
	283	// expects x, z in cm
	284
f6b6d58e	285	Float_t xloc=x;
	286	Float_t zloc=z;
	287	Float_t driftpath=fDx-TMath::Abs(fgkCm2Micron*xloc);
03898a57	288	x=driftpath/fDriftSpeed/fTimeStep;
f6b6d58e	289	if (xloc < 0) x = -x;
f6b6d58e	290	z=GetAnodeFromLocal(xloc,zloc);
4952f440	291	if(!fSetDriftSpeed){
4952f440	292	x=-9999.;
f6b6d58e	293	AliWarning("Drift speed not set: x coord. is dummy");
b0f5e3fc	294	}
b0f5e3fc	295	}
f5d698b9	296	//----------------------------------------------------------------------
db93954b	297	void AliITSsegmentationSDD::Print(Option_t *opt) const {
f5d698b9	298	// Print SDD segmentation Parameters
	299
	300	cout << "**************************************************" << endl;
ac74f489	301	cout << " Silicon Drift Detector Segmentation Parameters " << opt << endl;
f5d698b9	302	cout << "**************************************************" << endl;
	303	cout << "Number of Time Samples: " << fNsamples << endl;
	304	cout << "Number of Anodes: " << fNanodes << endl;
	305	cout << "Time Step (ns): " << fTimeStep << endl;
	306	cout << "Anode Pitch (um): " << fPitch << endl;
55d2c544	307	cout << "Full Detector Width (x): " << fDx;
	308	cout<<" (Default is "<<fgkDxDefault<<") "<<endl;
	309	cout << "Half Detector Length (z): " << fDz;
	310	cout<<" (Default is "<<fgkDzDefault<<") "<<endl;
	311	cout << "Full Detector Thickness (y): " << fDy;
	312	cout<<" (Default is "<<fgkDyDefault<<") "<<endl;
f5d698b9	313	cout << "**************************************************" << endl;
	314
	315	}
55d2c544	316
	317	//----------------------------------------------------------------------
	318	void AliITSsegmentationSDD::PrintDefaultParameters() const {
	319	// print SDD parameters defined as static const data members
	320
	321	cout << "**************************************************" << endl;
	322	cout << " Silicon Drift Detector Segmentation Parameters " << endl;
	323	cout << " Default values defined as static const data members"<< endl;
	324	cout << " Actual values can be set with the relevant setters"<< endl;
	325	cout << "**************************************************" << endl;
	326	cout<<"fgkDxDefault = "<<fgkDxDefault<<endl;
	327	cout<<"fgkDzDefault = "<<fgkDzDefault<<endl;
	328	cout<<"fgkDyDefault = "<<fgkDyDefault<<endl;
	329	cout<<"fgkPitchDefault = "<<fgkPitchDefault<<endl;
	330	cout<<"fgkClockDefault = "<<fgkClockDefault<<endl;
	331	cout<<"fgkHalfNanodesDefault = "<<fgkHalfNanodesDefault<<endl;
	332	cout<<"fgkNsamplesDefault = "<<fgkNsamplesDefault<<endl;
	333	cout << "**************************************************" << endl;
	334
	335	}
5752a110	336
5752a110	337	//______________________________________________________________________
aacedc3e	338	Bool_t AliITSsegmentationSDD::LocalToDet(Float_t x,Float_t z,
aacedc3e	339	Int_t &ix,Int_t &iz) const {
5752a110	340	// Transformation from Geant detector centered local coordinates (cm) to
	341	// time bucket numbers ix and anode number iz.
	342	// Input:
	343	// Float_t x detector local coordinate x in cm with respect to the
	344	// center of the sensitive volume.
	345	// Float_t z detector local coordinate z in cm with respect to the
	346	// center of the sensitive volulme.
	347	// Output:
	348	// Int_t ix detector x time coordinate. Has the range 0<=ix<fNsamples.
	349	// Int_t iz detector z anode coordinate. Has the range 0<=iz<fNandoes.
	350	// A value of -1 for ix or iz indecates that this point is outside of the
	351	// detector segmentation as defined.
f6b6d58e	352
f6b6d58e	353	Float_t dx,dz;
5752a110	354
	355	ix = -1; // default values
	356	iz = -1; // default values
f6b6d58e	357	dx = -fgkMicron2Cm*Dx(); // lower left edge in cm.
f6b6d58e	358	dz = -0.5fgkMicron2CmDz(); // lower left edge in cm.
507cf1a7	359	if(x<dx \|\| x>-dx) {
f6b6d58e	360	AliWarning(Form("Input argument %f out of range (%f, %f)",x,dx,-dx));
aacedc3e	361	return kFALSE; // outside of defined volume.
507cf1a7	362	}
507cf1a7	363	if(z<dz \|\| z>-dz) {
f6b6d58e	364	AliWarning(Form("Input argument %f out of range (%f, %f)",z,dz,-dz));
aacedc3e	365	return kFALSE; // outside of defined volume.
507cf1a7	366	}
f6b6d58e	367	GetPadIxz(x,z,ix,iz);
4952f440	368	if(!fSetDriftSpeed){
f6b6d58e	369	ix=-999;
f6b6d58e	370	AliWarning("Drift speed not set: timebin is dummy");
4952f440	371	return kFALSE;
4952f440	372	}
aacedc3e	373	return kTRUE; // Found ix and iz, return.
5752a110	374	}
5752a110	375	//______________________________________________________________________
55d2c544	376	void AliITSsegmentationSDD::DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z) const
5752a110	377	{
	378	// Transformation from Detector time bucket and anode coordiantes to Geant
	379	// detector centerd local coordinates (cm).
	380	// Input:
	381	// Int_t ix detector x time coordinate. Has the range 0<=ix<fNsamples.
	382	// Int_t iz detector z anode coordinate. Has the range 0<=iz<fNandoes.
	383	// Output:
	384	// Float_t x detector local coordinate x in cm with respect to the
	385	// center of the sensitive volume.
	386	// Float_t z detector local coordinate z in cm with respect to the
	387	// center of the sensitive volulme.
	388	// If ix and or iz is outside of the segmentation range a value of -Dx()
	389	// or -0.5*Dz() is returned.
5752a110	390
f6b6d58e	391	x=-Dx();
	392	z=-0.5*Dz();
	393	if(ix<0 \|\| ix>=Npx()) {
	394	AliWarning(Form("Input argument %d out of range (0, %d)",ix,Npx()));
	395	return; // outside of detector
	396	}
	397	if(iz<0 \|\| iz>=Npz()) {
	398	AliWarning(Form("Input argument %d out of range (0, %d)",iz,Npz()));
	399	return; // outside of detctor
	400	}
	401	GetPadCxz(ix,iz,x,z);
	402	if(!fSetDriftSpeed){
	403	x=-9999.;
	404	AliWarning("Drift speed not set: x coord. is dummy");
	405	}
	406	return; // Found x and z, return.
5752a110	407	}