[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 "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                                         //
/////////////////////////////////////////////////////////////////////////////

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 Float_t AliITSsegmentationSDD::fgkCm2Micron = 10000.;
const Float_t AliITSsegmentationSDD::fgkMicron2Cm = 1.0E-04;
ClassImp(AliITSsegmentationSDD)
//----------------------------------------------------------------------
AliITSsegmentationSDD::AliITSsegmentationSDD(AliITSgeom* geom):
AliITSsegmentation(geom),
fNsamples(0),
fNanodes(0),
fPitch(0),
fTimeStep(0),
fDriftSpeed(0),
fSetDriftSpeed(0){
  // constructor
   fDriftSpeed=AliITSresponseSDD::DefaultDriftSpeed();
   fCorr=0;
   SetDetSize(fgkDxDefault,fgkDzDefault,fgkDyDefault);
   SetPadSize(fgkPitchDefault,fgkClockDefault);
   SetNPads(fgkHalfNanodesDefault,fgkNsamplesDefault);
}
//______________________________________________________________________
AliITSsegmentationSDD::AliITSsegmentationSDD() : AliITSsegmentation(),
fNsamples(0),
fNanodes(0),
fPitch(0),
fTimeStep(0),
fDriftSpeed(0),
fSetDriftSpeed(0){
  // Default constructor
   fDriftSpeed=0;  
   SetDetSize(fgkDxDefault,fgkDzDefault,fgkDyDefault);
   SetPadSize(fgkPitchDefault,fgkClockDefault);
   SetNPads(fgkHalfNanodesDefault,fgkNsamplesDefault);
}

//______________________________________________________________________
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

   if(!fGeom) {
     AliFatal("Pointer to ITS geometry class (AliITSgeom) is null\n");
     return;
   }
   AliITSgeomSDD *gsdd = (AliITSgeomSDD *) (fGeom->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;
}
//----------------------------------------------------------------------
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>
b0f5e3fc	17
b0f5e3fc	18	#include "AliITSsegmentationSDD.h"
d953664a	19	#include "AliITSgeomSDD.h"
fcf95fc7	20	#include "AliITSresponseSDD.h"
f6b6d58e	21
	22	/////////////////////////////////////////////////////////////////////////////
	23	// Segmentation class for drift detectors //
	24	// //
	25	// microcables microcables //
	26	// /\ /\ //
	27	// \|\| \|\| //
	28	// \|\| \|\| //
	29	// \|\| \|\| //
	30	// 0 256 0 //
	31	// 0 \|----------------------\|---------------------\| 511 //
	32	// \| time-bins \| time-bins \| //
	33	// \| a \| a \| //
	34	// \| n \| n \| //
	35	// X <_\|_o____________________\|___________________o_\|__ //
	36	// \| d \| d \| //
	37	// \| e LEFT SIDE \| RIGHT SIDE e \| //
	38	// \| s CHANNEL 0 \| CHANNEL 1 s \| //
	39	// \| Xlocal > 0 \| Xlocal < 0 \| //
	40	// 255 \|----------------------\|---------------------\| 256 //
	41	// \| //
	42	// \| //
	43	// V //
	44	// Z //
	45	/////////////////////////////////////////////////////////////////////////////
55d2c544	46
	47	const Float_t AliITSsegmentationSDD::fgkDxDefault = 35085.;
	48	const Float_t AliITSsegmentationSDD::fgkDzDefault = 75264.;
	49	const Float_t AliITSsegmentationSDD::fgkDyDefault = 300.;
	50	const Float_t AliITSsegmentationSDD::fgkPitchDefault = 294.;
	51	const Float_t AliITSsegmentationSDD::fgkClockDefault = 40.;
	52	const Int_t AliITSsegmentationSDD::fgkHalfNanodesDefault = 256;
	53	const Int_t AliITSsegmentationSDD::fgkNsamplesDefault = 256;
f6b6d58e	54	const Float_t AliITSsegmentationSDD::fgkCm2Micron = 10000.;
f6b6d58e	55	const Float_t AliITSsegmentationSDD::fgkMicron2Cm = 1.0E-04;
b0f5e3fc	56	ClassImp(AliITSsegmentationSDD)
2a4239d3	57	//----------------------------------------------------------------------
4952f440	58	AliITSsegmentationSDD::AliITSsegmentationSDD(AliITSgeom* geom):
f6b6d58e	59	AliITSsegmentation(geom),
e56160b8	60	fNsamples(0),
	61	fNanodes(0),
	62	fPitch(0),
	63	fTimeStep(0),
4952f440	64	fDriftSpeed(0),
4952f440	65	fSetDriftSpeed(0){
b0f5e3fc	66	// constructor
4952f440	67	fDriftSpeed=AliITSresponseSDD::DefaultDriftSpeed();
b0f5e3fc	68	fCorr=0;
55d2c544	69	SetDetSize(fgkDxDefault,fgkDzDefault,fgkDyDefault);
	70	SetPadSize(fgkPitchDefault,fgkClockDefault);
	71	SetNPads(fgkHalfNanodesDefault,fgkNsamplesDefault);
b0f5e3fc	72	}
2a4239d3	73	//______________________________________________________________________
e56160b8	74	AliITSsegmentationSDD::AliITSsegmentationSDD() : AliITSsegmentation(),
	75	fNsamples(0),
	76	fNanodes(0),
	77	fPitch(0),
	78	fTimeStep(0),
4952f440	79	fDriftSpeed(0),
4952f440	80	fSetDriftSpeed(0){
55d2c544	81	// Default constructor
03898a57	82	fDriftSpeed=0;
55d2c544	83	SetDetSize(fgkDxDefault,fgkDzDefault,fgkDyDefault);
	84	SetPadSize(fgkPitchDefault,fgkClockDefault);
	85	SetNPads(fgkHalfNanodesDefault,fgkNsamplesDefault);
55d2c544	86	}
b0f5e3fc	87
55d2c544	88	//______________________________________________________________________
	89	void AliITSsegmentationSDD::Copy(TObject &obj) const {
	90	// protected method. copy this to obj
	91	AliITSsegmentation::Copy(obj);
	92	((AliITSsegmentationSDD& ) obj).fNsamples = fNsamples;
	93	((AliITSsegmentationSDD& ) obj).fNanodes = fNanodes;
	94	((AliITSsegmentationSDD& ) obj).fPitch = fPitch;
	95	((AliITSsegmentationSDD& ) obj).fTimeStep = fTimeStep;
	96	((AliITSsegmentationSDD& ) obj).fDriftSpeed = fDriftSpeed;
4952f440	97	((AliITSsegmentationSDD& ) obj).fSetDriftSpeed = fSetDriftSpeed;
b0f5e3fc	98	}
55d2c544	99
	100	//______________________________________________________________________
	101	AliITSsegmentationSDD& AliITSsegmentationSDD::operator=(const AliITSsegmentationSDD &source){
	102	// = operator
	103	if(this==&source) return *this;
	104	source.Copy(*this);
	105	return *this;
	106	}
	107
	108	//____________________________________________________________________________
	109	AliITSsegmentationSDD::AliITSsegmentationSDD(const AliITSsegmentationSDD &source) :
e56160b8	110	AliITSsegmentation(source),
	111	fNsamples(0),
	112	fNanodes(0),
	113	fPitch(0),
	114	fTimeStep(0),
4952f440	115	fDriftSpeed(0),
4952f440	116	fSetDriftSpeed(0){
55d2c544	117	// copy constructor
	118	source.Copy(*this);
	119	}
	120
2a4239d3	121	//----------------------------------------------------------------------
b0f5e3fc	122	void AliITSsegmentationSDD::Init(){
	123	// Standard initilisation routine
	124
e8189707	125	if(!fGeom) {
f6b6d58e	126	AliFatal("Pointer to ITS geometry class (AliITSgeom) is null\n");
314ba410	127	return;
e8189707	128	}
b0f5e3fc	129	AliITSgeomSDD gsdd = (AliITSgeomSDD ) (fGeom->GetShape(3,1,1));
b0f5e3fc	130
f6b6d58e	131	fDz = 2.fgkCm2Microngsdd->GetDz();
	132	fDx = fgkCm2Micron*gsdd->GetDx();
	133	fDy = 2.fgkCm2Microngsdd->GetDy();
b0f5e3fc	134	}
b0f5e3fc	135
2a4239d3	136	//----------------------------------------------------------------------
b0f5e3fc	137	void AliITSsegmentationSDD::
55d2c544	138	Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]) const {
314ba410	139	// returns neighbours for use in Cluster Finder routines and the like
b0f5e3fc	140
e8189707	141	if(iX >= fNanodes) printf("iX > fNanodes %d %d\n",iX,fNanodes);
e8189707	142	if(iZ >= fNsamples) printf("iZ > fNsamples %d %d\n",iZ,fNsamples);
b0f5e3fc	143	*Nlist=4;
b0f5e3fc	144	Xlist[0]=Xlist[1]=iX;
314ba410	145	if(iX && (iX != fNanodes/2)) Xlist[2]=iX-1;
b0f5e3fc	146	else Xlist[2]=iX;
314ba410	147	if ((iX !=fNanodes/2 -1) && (iX != fNanodes)) Xlist[3]=iX+1;
b0f5e3fc	148	else Xlist[3]=iX;
	149	if(iZ) Zlist[0]=iZ-1;
	150	else Zlist[0]=iZ;
	151	if (iZ < fNsamples) Zlist[1]=iZ+1;
	152	else Zlist[1]=iZ;
	153	Zlist[2]=Zlist[3]=iZ;
b0f5e3fc	154	}
2a4239d3	155	//----------------------------------------------------------------------
f6b6d58e	156	Float_t AliITSsegmentationSDD::GetAnodeFromLocal(Float_t xloc,Float_t zloc) const {
	157	// returns anode coordinate (as float) starting from local coordinates
	158	Float_t xAnode=zloc*fgkCm2Micron/fPitch;
	159	if(xloc>0){ // left side (anodes 0-255, anode 0 at zloc<0)
	160	xAnode+=(Float_t)fNanodes/4;
	161	}else{ // right side (anodes 256-511, anode 0 at zloc>0)
	162	xAnode=3*fNanodes/4-xAnode;
	163	}
	164	return xAnode;
	165	}
	166
	167	//----------------------------------------------------------------------
	168	Float_t AliITSsegmentationSDD::GetLocalZFromAnode(Int_t nAnode) const{
	169	// returns local Z coordinate from anode number (integer)
	170	Float_t zAnode=(Float_t)nAnode+0.5;
	171	return GetLocalZFromAnode(zAnode);
	172	}
	173
	174	//----------------------------------------------------------------------
	175	Float_t AliITSsegmentationSDD::GetLocalZFromAnode(Float_t zAnode) const{
	176	// returns local Z coordinate from anode number (float)
	177	Float_t zloc=0.;
	178	if(zAnode<fNanodes/2){ // left side
	179	zloc=(zAnodefPitch-fDz/2)fgkMicron2Cm;
	180	}else{ // right side
	181	zAnode-=fNanodes/2;
	182	zloc=-(zAnodefPitch-fDz/2)fgkMicron2Cm;
	183	}
	184	return zloc;
	185	}
	186	//----------------------------------------------------------------------
2a4239d3	187	void AliITSsegmentationSDD::GetPadIxz(Float_t x,Float_t z,
55d2c544	188	Int_t &timebin,Int_t &anode) const {
f6b6d58e	189	// Returns cell coordinates (time sample,anode)
03898a57	190	// for given real local coordinates (x,z)
b0f5e3fc	191
f6b6d58e	192	// expects x, z in cm
b0f5e3fc	193
f6b6d58e	194	Float_t driftpath=fDx-TMath::Abs(x*fgkCm2Micron);
	195	timebin=(Int_t)(driftpath/fDriftSpeed/fTimeStep);
	196	anode=(Int_t)GetAnodeFromLocal(x,z);
	197	if(!fSetDriftSpeed){
	198	timebin=-999;
	199	AliWarning("Drift speed not set: timebin is dummy");
	200	}
b0f5e3fc	201
b0f5e3fc	202	}
2a4239d3	203	//----------------------------------------------------------------------
2a4239d3	204	void AliITSsegmentationSDD::GetPadCxz(Int_t timebin,Int_t anode,
55d2c544	205	Float_t &x ,Float_t &z) const{
f6b6d58e	206	// Transform from cell to real local coordinates
f6b6d58e	207	// returns x, z in cm
b0f5e3fc	208
03898a57	209	// the +0.5 means that an # and time bin # should start from 0 !!!
03898a57	210	// the +0.5 means that an # and time bin # should start from 0 !!!
b0f5e3fc	211
f6b6d58e	212	Float_t driftpath=GetDriftTimeFromTb(timebin)*fDriftSpeed;
	213	if (anode < fNanodes/2){ // left side, positive x
	214	x=(fDx-driftpath)*fgkMicron2Cm;
	215	}else{ // right side, negative x
	216	x = -(fDx-driftpath)*fgkMicron2Cm;
	217	}
	218	z=GetLocalZFromAnode(anode);
	219	if(!fSetDriftSpeed){
	220	x=-9999.;
	221	AliWarning("Drift speed not set: x coord. is dummy");
	222	}
b0f5e3fc	223	}
2a4239d3	224	//----------------------------------------------------------------------
55d2c544	225	void AliITSsegmentationSDD::GetPadTxz(Float_t &x,Float_t &z) const{
e8189707	226	// Get anode and time bucket as floats - numbering from 0
	227
	228	// expects x, z in cm
	229
f6b6d58e	230	Float_t xloc=x;
	231	Float_t zloc=z;
	232	Float_t driftpath=fDx-TMath::Abs(fgkCm2Micron*xloc);
03898a57	233	x=driftpath/fDriftSpeed/fTimeStep;
f6b6d58e	234	if (xloc < 0) x = -x;
f6b6d58e	235	z=GetAnodeFromLocal(xloc,zloc);
4952f440	236	if(!fSetDriftSpeed){
4952f440	237	x=-9999.;
f6b6d58e	238	AliWarning("Drift speed not set: x coord. is dummy");
b0f5e3fc	239	}
b0f5e3fc	240	}
f5d698b9	241	//----------------------------------------------------------------------
db93954b	242	void AliITSsegmentationSDD::Print(Option_t *opt) const {
f5d698b9	243	// Print SDD segmentation Parameters
	244
	245	cout << "**************************************************" << endl;
ac74f489	246	cout << " Silicon Drift Detector Segmentation Parameters " << opt << endl;
f5d698b9	247	cout << "**************************************************" << endl;
	248	cout << "Number of Time Samples: " << fNsamples << endl;
	249	cout << "Number of Anodes: " << fNanodes << endl;
	250	cout << "Time Step (ns): " << fTimeStep << endl;
	251	cout << "Anode Pitch (um): " << fPitch << endl;
55d2c544	252	cout << "Full Detector Width (x): " << fDx;
	253	cout<<" (Default is "<<fgkDxDefault<<") "<<endl;
	254	cout << "Half Detector Length (z): " << fDz;
	255	cout<<" (Default is "<<fgkDzDefault<<") "<<endl;
	256	cout << "Full Detector Thickness (y): " << fDy;
	257	cout<<" (Default is "<<fgkDyDefault<<") "<<endl;
f5d698b9	258	cout << "**************************************************" << endl;
	259
	260	}
55d2c544	261
	262	//----------------------------------------------------------------------
	263	void AliITSsegmentationSDD::PrintDefaultParameters() const {
	264	// print SDD parameters defined as static const data members
	265
	266	cout << "**************************************************" << endl;
	267	cout << " Silicon Drift Detector Segmentation Parameters " << endl;
	268	cout << " Default values defined as static const data members"<< endl;
	269	cout << " Actual values can be set with the relevant setters"<< endl;
	270	cout << "**************************************************" << endl;
	271	cout<<"fgkDxDefault = "<<fgkDxDefault<<endl;
	272	cout<<"fgkDzDefault = "<<fgkDzDefault<<endl;
	273	cout<<"fgkDyDefault = "<<fgkDyDefault<<endl;
	274	cout<<"fgkPitchDefault = "<<fgkPitchDefault<<endl;
	275	cout<<"fgkClockDefault = "<<fgkClockDefault<<endl;
	276	cout<<"fgkHalfNanodesDefault = "<<fgkHalfNanodesDefault<<endl;
	277	cout<<"fgkNsamplesDefault = "<<fgkNsamplesDefault<<endl;
	278	cout << "**************************************************" << endl;
	279
	280	}
5752a110	281
5752a110	282	//______________________________________________________________________
aacedc3e	283	Bool_t AliITSsegmentationSDD::LocalToDet(Float_t x,Float_t z,
aacedc3e	284	Int_t &ix,Int_t &iz) const {
5752a110	285	// Transformation from Geant detector centered local coordinates (cm) to
	286	// time bucket numbers ix and anode number iz.
	287	// Input:
	288	// Float_t x detector local coordinate x in cm with respect to the
	289	// center of the sensitive volume.
	290	// Float_t z detector local coordinate z in cm with respect to the
	291	// center of the sensitive volulme.
	292	// Output:
	293	// Int_t ix detector x time coordinate. Has the range 0<=ix<fNsamples.
	294	// Int_t iz detector z anode coordinate. Has the range 0<=iz<fNandoes.
	295	// A value of -1 for ix or iz indecates that this point is outside of the
	296	// detector segmentation as defined.
f6b6d58e	297
f6b6d58e	298	Float_t dx,dz;
5752a110	299
	300	ix = -1; // default values
	301	iz = -1; // default values
f6b6d58e	302	dx = -fgkMicron2Cm*Dx(); // lower left edge in cm.
f6b6d58e	303	dz = -0.5fgkMicron2CmDz(); // lower left edge in cm.
507cf1a7	304	if(x<dx \|\| x>-dx) {
f6b6d58e	305	AliWarning(Form("Input argument %f out of range (%f, %f)",x,dx,-dx));
aacedc3e	306	return kFALSE; // outside of defined volume.
507cf1a7	307	}
507cf1a7	308	if(z<dz \|\| z>-dz) {
f6b6d58e	309	AliWarning(Form("Input argument %f out of range (%f, %f)",z,dz,-dz));
aacedc3e	310	return kFALSE; // outside of defined volume.
507cf1a7	311	}
f6b6d58e	312	GetPadIxz(x,z,ix,iz);
4952f440	313	if(!fSetDriftSpeed){
f6b6d58e	314	ix=-999;
f6b6d58e	315	AliWarning("Drift speed not set: timebin is dummy");
4952f440	316	return kFALSE;
4952f440	317	}
aacedc3e	318	return kTRUE; // Found ix and iz, return.
5752a110	319	}
5752a110	320	//______________________________________________________________________
55d2c544	321	void AliITSsegmentationSDD::DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z) const
5752a110	322	{
	323	// Transformation from Detector time bucket and anode coordiantes to Geant
	324	// detector centerd local coordinates (cm).
	325	// Input:
	326	// Int_t ix detector x time coordinate. Has the range 0<=ix<fNsamples.
	327	// Int_t iz detector z anode coordinate. Has the range 0<=iz<fNandoes.
	328	// Output:
	329	// Float_t x detector local coordinate x in cm with respect to the
	330	// center of the sensitive volume.
	331	// Float_t z detector local coordinate z in cm with respect to the
	332	// center of the sensitive volulme.
	333	// If ix and or iz is outside of the segmentation range a value of -Dx()
	334	// or -0.5*Dz() is returned.
5752a110	335
f6b6d58e	336	x=-Dx();
	337	z=-0.5*Dz();
	338	if(ix<0 \|\| ix>=Npx()) {
	339	AliWarning(Form("Input argument %d out of range (0, %d)",ix,Npx()));
	340	return; // outside of detector
	341	}
	342	if(iz<0 \|\| iz>=Npz()) {
	343	AliWarning(Form("Input argument %d out of range (0, %d)",iz,Npz()));
	344	return; // outside of detctor
	345	}
	346	GetPadCxz(ix,iz,x,z);
	347	if(!fSetDriftSpeed){
	348	x=-9999.;
	349	AliWarning("Drift speed not set: x coord. is dummy");
	350	}
	351	return; // Found x and z, return.
5752a110	352	}