[u/mrichter/AliRoot.git] / ITS / AliITSsimulationFastPointsV0.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.                  *
 ***********************************************************************/

/* $Id$ */
/////////////////////////////////////////////////////////
//  fast simulation V0                                 //
//                                                     //
//                                                     //
/////////////////////////////////////////////////////////

#include "AliITS.h"
#include "AliITShit.h"
#include "AliITSRecPoint.h"
#include "AliITSmodule.h"
#include "AliITSsimulationFastPointsV0.h"
#include "AliITSstatistics.h"

ClassImp(AliITSsimulationFastPointsV0)

AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0():
fNrecp(0),
fSx(0),
fSz(0){
  // default constructor
}
AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0(const char *dataType):
fNrecp(0),
fSx(0),
fSz(0){
  //constructor
  Info("AliITSsimulationFastPointsV0","Standard constructor %s",dataType);
  fSx = new AliITSstatistics(2);
  fSz = new AliITSstatistics(2);
}
//______________________________________________________________________
AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0(const AliITSsimulationFastPointsV0 & rec):AliITSsimulation(rec),
fNrecp(rec.fNrecp),
fSx(rec.fSx),
fSz(rec.fSz){
    // Copy constructor. 

}
//______________________________________________________________________
AliITSsimulationFastPointsV0& AliITSsimulationFastPointsV0::operator=(const AliITSsimulationFastPointsV0&  /*source*/){
    // Assignment operator
  Error("operator=","Assignment operator not allowed");
  return *this;
}

//----------------------------------------------------------
AliITSsimulationFastPointsV0::~AliITSsimulationFastPointsV0()
{
  //destructor
  if(fSx) delete fSx;
  if(fSz) delete fSz;

}

//-------------------------------------------------------------
void AliITSsimulationFastPointsV0::CreateFastRecPoints(AliITSmodule *mod,Int_t module,TRandom *rndm, TClonesArray* recp) {
  // Fast points simulator for all of the ITS.

  Int_t   nhit,h,trk,ifirst;
  Float_t x,y,z,t,e;// local coordinate (cm) and time of flight, and dedx.
  Float_t x1,y1,z1;
  AliITShit *hit;

  if(rndm!=0) module=0; // fix unsued parameter warnings.
  fSx->Reset(); // Start out with things clearly zeroed
  fSz->Reset(); // Start out with things clearly zeroed
  e = 0.; // Start out with things clearly zeroed
  Double_t weight=1.;
  nhit = mod->GetNhits();
  ifirst = 1;
  for(h=0;h<nhit;h++){
    hit = mod->GetHit(h);
    hit->GetPositionL(x,y,z,t);
    if(ifirst) {x1=x;y1=y;z1=z;}
    e += hit->GetIonization();
    trk = hit->GetTrack();
    fSx->AddValue((Double_t)x,weight);
    fSz->AddValue((Double_t)z,weight);
    ifirst = 0;
    if(hit->StatusExiting()||  // leaving volume
       hit->StatusDisappeared()|| // interacted/decayed...
       hit->StatusStop() // dropped below E cuts.
       ){ // exiting track, write out RecPoint.
      //      if(fSz->GetRMS()>1.E-1) {
      //	TParticle *part = hit->GetParticle();
      //	printf("idpart %d energy %f \n",part->GetPdgCode(),part->Energy());
      //	printf("diffx=%e diffy=%e diffz=%e\n",x-x1,y-y1,z-z1);
      //      }
      switch (mod->GetLayer()){
      case 1: case 2:  // SPDs
	AddSPD(e,mod,trk,recp);
	break;
      case 3: case 4:  // SDDs
	AddSDD(e,mod,trk,recp);
	break;
      case 5: case 6:  // SSDs
	AddSSD(e,mod,trk,recp);
	break;
      } // end switch
      fSx->Reset();
      fSz->Reset();
      e = 0.;
      ifirst = 1;
      continue;
    }// end if
  } // end for h
}
//_______________________________________________________________________
void AliITSsimulationFastPointsV0::AddSPD(Float_t &e,
					  AliITSmodule* mod,Int_t trackNumber,TClonesArray* recp){
  //
  TClonesArray &pt=*recp;
  const Float_t kmicronTocm = 1.0e-4;
  //  const Float_t kdEdXtoQ = ;
  const Float_t kRMSx = 12.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
  const Float_t kRMSz = 70.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
  
  Int_t lab[4] = {trackNumber,-3,-3,mod->GetIndex()};
  Float_t a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx;
  //  if(a1>1.E5) printf("addSPD: layer=%d track #%d dedx=%e sigmaX2= %e ",
  //		    mod->GetLayer(),trackNumber,e,a1);
  Float_t a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz;
  //  if(a1>1.E5) printf(" sigmaZ2= %e\n",a2);
  Float_t hit[5] = {fSx->GetMean(),fSz->GetMean(),a1,a2,1.0};
  Int_t info[3] = {0,0,mod->GetLayer()};

  AliITSRecPoint rpSPD(lab,hit,info,kTRUE);
  rpSPD.SetdEdX(e);

  new (pt[fNrecp]) AliITSRecPoint(rpSPD);
  fNrecp++;
}
//_______________________________________________________________________
void AliITSsimulationFastPointsV0::AddSDD(Float_t &e,
					  AliITSmodule* mod,Int_t trackNumber,TClonesArray* recp){
  //
  TClonesArray &pt=*recp;
  const Float_t kmicronTocm = 1.0e-4;
  const Float_t kdEdXtoQ = 2.778e+8; 
  const Float_t kRMSx = 38.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
  const Float_t kRMSz = 28.0*kmicronTocm; // microns->cm ITS TDR Table 1.3

  Int_t lab[4] = {trackNumber,-3,-3,mod->GetIndex()};
  Float_t a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx;
  //  if(a1>1.E5) printf("addSPD: layer=%d track #%d dedx=%e sigmaX2= %e ",
  //		    mod->GetLayer(),trackNumber,e,a1);
  Float_t a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz;
  //  if(a1>1.E5) printf(" sigmaZ2= %e\n",a2);
  Float_t hit[5] = {fSx->GetMean(),fSz->GetMean(),a1,a2,kdEdXtoQ*e};
  Int_t info[3] = {0,0,mod->GetLayer()};

  AliITSRecPoint rpSDD(lab,hit,info,kTRUE);
  rpSDD.SetdEdX(e);

  new (pt[fNrecp]) AliITSRecPoint(rpSDD);
  fNrecp++;

}
//_______________________________________________________________________
void AliITSsimulationFastPointsV0::AddSSD(Float_t &e,
					  AliITSmodule* mod,Int_t trackNumber,TClonesArray* recp){
  // 
  TClonesArray &pt=*recp;
  const Float_t kmicronTocm = 1.0e-4;
  const Float_t kdEdXtoQ = 2.778e+8;
  const Float_t kRMSx = 20.0*kmicronTocm;  // microns->cm ITS TDR Table 1.3
  const Float_t kRMSz = 830.0*kmicronTocm; // microns->cm ITS TDR Table 1.3

  Int_t lab[4] = {trackNumber,-3,-3,mod->GetIndex()};
  Float_t a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx;
  //  if(a1>1.E5) printf("addSPD: layer=%d track #%d dedx=%e sigmaX2= %e ",
  //		    mod->GetLayer(),trackNumber,e,a1);
  Float_t a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz;
  //  if(a1>1.E5) printf(" sigmaZ2= %e\n",a2);
  Float_t hit[5] = {fSx->GetMean(),fSz->GetMean(),a1,a2,kdEdXtoQ*e};
  Int_t info[3] = {0,0,mod->GetLayer()};

  AliITSRecPoint rpSSD(lab,hit,info,kTRUE);
  rpSSD.SetdEdX(e);

  new (pt[fNrecp]) AliITSRecPoint(rpSSD);
  fNrecp++;


}
//_______________________________________________________________________
Commit	Line	Data
e8189707	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. *
7d62fb64	14	***********************************************************************/
e8189707	15
803d1ab0	16	/* $Id$ */
7d62fb64	17	/////////////////////////////////////////////////////////
	18	// fast simulation V0 //
	19	// //
	20	// //
	21	/////////////////////////////////////////////////////////
e8189707	22
e8189707	23	#include "AliITS.h"
517784f0	24	#include "AliITShit.h"
	25	#include "AliITSRecPoint.h"
	26	#include "AliITSmodule.h"
e8189707	27	#include "AliITSsimulationFastPointsV0.h"
	28	#include "AliITSstatistics.h"
	29
	30	ClassImp(AliITSsimulationFastPointsV0)
	31
7537d03c	32	AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0():
	33	fNrecp(0),
	34	fSx(0),
	35	fSz(0){
9de0700b	36	// default constructor
9de0700b	37	}
7537d03c	38	AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0(const char *dataType):
	39	fNrecp(0),
	40	fSx(0),
	41	fSz(0){
e8189707	42	//constructor
d0df5576	43	Info("AliITSsimulationFastPointsV0","Standard constructor %s",dataType);
e8189707	44	fSx = new AliITSstatistics(2);
	45	fSz = new AliITSstatistics(2);
	46	}
7d62fb64	47	//______________________________________________________________________
7537d03c	48	AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0(const AliITSsimulationFastPointsV0 & rec):AliITSsimulation(rec),
	49	fNrecp(rec.fNrecp),
	50	fSx(rec.fSx),
	51	fSz(rec.fSz){
7d62fb64	52	// Copy constructor.
7d62fb64	53
7d62fb64	54	}
7d62fb64	55	//______________________________________________________________________
7537d03c	56	AliITSsimulationFastPointsV0& AliITSsimulationFastPointsV0::operator=(const AliITSsimulationFastPointsV0& /source/){
	57	// Assignment operator
	58	Error("operator=","Assignment operator not allowed");
	59	return *this;
7d62fb64	60	}
e8189707	61
	62	//----------------------------------------------------------
	63	AliITSsimulationFastPointsV0::~AliITSsimulationFastPointsV0()
	64	{
	65	//destructor
9de0700b	66	if(fSx) delete fSx;
9de0700b	67	if(fSz) delete fSz;
e8189707	68
	69	}
	70
	71	//-------------------------------------------------------------
7d62fb64	72	void AliITSsimulationFastPointsV0::CreateFastRecPoints(AliITSmodule mod,Int_t module,TRandom rndm, TClonesArray* recp) {
e8189707	73	// Fast points simulator for all of the ITS.
7d62fb64	74
e8189707	75	Int_t nhit,h,trk,ifirst;
	76	Float_t x,y,z,t,e;// local coordinate (cm) and time of flight, and dedx.
	77	Float_t x1,y1,z1;
	78	AliITShit *hit;
	79
ac74f489	80	if(rndm!=0) module=0; // fix unsued parameter warnings.
e8189707	81	fSx->Reset(); // Start out with things clearly zeroed
	82	fSz->Reset(); // Start out with things clearly zeroed
	83	e = 0.; // Start out with things clearly zeroed
	84	Double_t weight=1.;
	85	nhit = mod->GetNhits();
	86	ifirst = 1;
	87	for(h=0;h<nhit;h++){
	88	hit = mod->GetHit(h);
	89	hit->GetPositionL(x,y,z,t);
	90	if(ifirst) {x1=x;y1=y;z1=z;}
	91	e += hit->GetIonization();
	92	trk = hit->GetTrack();
	93	fSx->AddValue((Double_t)x,weight);
	94	fSz->AddValue((Double_t)z,weight);
	95	ifirst = 0;
	96	if(hit->StatusExiting()\|\| // leaving volume
	97	hit->StatusDisappeared()\|\| // interacted/decayed...
	98	hit->StatusStop() // dropped below E cuts.
	99	){ // exiting track, write out RecPoint.
	100	// if(fSz->GetRMS()>1.E-1) {
	101	// TParticle *part = hit->GetParticle();
	102	// printf("idpart %d energy %f \n",part->GetPdgCode(),part->Energy());
	103	// printf("diffx=%e diffy=%e diffz=%e\n",x-x1,y-y1,z-z1);
	104	// }
	105	switch (mod->GetLayer()){
	106	case 1: case 2: // SPDs
7d62fb64	107	AddSPD(e,mod,trk,recp);
e8189707	108	break;
e8189707	109	case 3: case 4: // SDDs
7d62fb64	110	AddSDD(e,mod,trk,recp);
e8189707	111	break;
e8189707	112	case 5: case 6: // SSDs
7d62fb64	113	AddSSD(e,mod,trk,recp);
e8189707	114	break;
	115	} // end switch
	116	fSx->Reset();
	117	fSz->Reset();
	118	e = 0.;
	119	ifirst = 1;
	120	continue;
	121	}// end if
	122	} // end for h
	123	}
	124	//_______________________________________________________________________
	125	void AliITSsimulationFastPointsV0::AddSPD(Float_t &e,
00a7cc50	126	AliITSmodule* mod,Int_t trackNumber,TClonesArray* recp){
d2f55a22	127	//
7d62fb64	128	TClonesArray &pt=*recp;
e8189707	129	const Float_t kmicronTocm = 1.0e-4;
	130	// const Float_t kdEdXtoQ = ;
	131	const Float_t kRMSx = 12.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
	132	const Float_t kRMSz = 70.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
00a7cc50	133
75fb37cc	134	Int_t lab[4] = {trackNumber,-3,-3,mod->GetIndex()};
75fb37cc	135	Float_t a1 = fSx->GetRMS(); a1 = a1; a1 += kRMSxkRMSx;
e8189707	136	// if(a1>1.E5) printf("addSPD: layer=%d track #%d dedx=%e sigmaX2= %e ",
e8189707	137	// mod->GetLayer(),trackNumber,e,a1);
75fb37cc	138	Float_t a2 = fSz->GetRMS(); a2 = a2; a2 += kRMSzkRMSz;
e8189707	139	// if(a1>1.E5) printf(" sigmaZ2= %e\n",a2);
75fb37cc	140	Float_t hit[5] = {fSx->GetMean(),fSz->GetMean(),a1,a2,1.0};
	141	Int_t info[3] = {0,0,mod->GetLayer()};
	142
	143	AliITSRecPoint rpSPD(lab,hit,info,kTRUE);
	144	rpSPD.SetdEdX(e);
	145
7d62fb64	146	new (pt[fNrecp]) AliITSRecPoint(rpSPD);
7d62fb64	147	fNrecp++;
e8189707	148	}
	149	//_______________________________________________________________________
	150	void AliITSsimulationFastPointsV0::AddSDD(Float_t &e,
00a7cc50	151	AliITSmodule* mod,Int_t trackNumber,TClonesArray* recp){
d2f55a22	152	//
7d62fb64	153	TClonesArray &pt=*recp;
e8189707	154	const Float_t kmicronTocm = 1.0e-4;
	155	const Float_t kdEdXtoQ = 2.778e+8;
	156	const Float_t kRMSx = 38.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
	157	const Float_t kRMSz = 28.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
e8189707	158
75fb37cc	159	Int_t lab[4] = {trackNumber,-3,-3,mod->GetIndex()};
	160	Float_t a1 = fSx->GetRMS(); a1 = a1; a1 += kRMSxkRMSx;
	161	// if(a1>1.E5) printf("addSPD: layer=%d track #%d dedx=%e sigmaX2= %e ",
e8189707	162	// mod->GetLayer(),trackNumber,e,a1);
75fb37cc	163	Float_t a2 = fSz->GetRMS(); a2 = a2; a2 += kRMSzkRMSz;
e8189707	164	// if(a1>1.E5) printf(" sigmaZ2= %e\n",a2);
75fb37cc	165	Float_t hit[5] = {fSx->GetMean(),fSz->GetMean(),a1,a2,kdEdXtoQ*e};
	166	Int_t info[3] = {0,0,mod->GetLayer()};
	167
	168	AliITSRecPoint rpSDD(lab,hit,info,kTRUE);
	169	rpSDD.SetdEdX(e);
	170
7d62fb64	171	new (pt[fNrecp]) AliITSRecPoint(rpSDD);
	172	fNrecp++;
	173
e8189707	174	}
	175	//_______________________________________________________________________
	176	void AliITSsimulationFastPointsV0::AddSSD(Float_t &e,
00a7cc50	177	AliITSmodule* mod,Int_t trackNumber,TClonesArray* recp){
d2f55a22	178	//
7d62fb64	179	TClonesArray &pt=*recp;
e8189707	180	const Float_t kmicronTocm = 1.0e-4;
	181	const Float_t kdEdXtoQ = 2.778e+8;
	182	const Float_t kRMSx = 20.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
	183	const Float_t kRMSz = 830.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
e8189707	184
75fb37cc	185	Int_t lab[4] = {trackNumber,-3,-3,mod->GetIndex()};
	186	Float_t a1 = fSx->GetRMS(); a1 = a1; a1 += kRMSxkRMSx;
	187	// if(a1>1.E5) printf("addSPD: layer=%d track #%d dedx=%e sigmaX2= %e ",
	188	// mod->GetLayer(),trackNumber,e,a1);
	189	Float_t a2 = fSz->GetRMS(); a2 = a2; a2 += kRMSzkRMSz;
	190	// if(a1>1.E5) printf(" sigmaZ2= %e\n",a2);
	191	Float_t hit[5] = {fSx->GetMean(),fSz->GetMean(),a1,a2,kdEdXtoQ*e};
	192	Int_t info[3] = {0,0,mod->GetLayer()};
00a7cc50	193
75fb37cc	194	AliITSRecPoint rpSSD(lab,hit,info,kTRUE);
e8189707	195	rpSSD.SetdEdX(e);
75fb37cc	196
7d62fb64	197	new (pt[fNrecp]) AliITSRecPoint(rpSSD);
	198	fNrecp++;
	199
	200
e8189707	201	}
	202	//_______________________________________________________________________
	203