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

  Error("Copy constructor","Copy constructor not allowed");
  
}
//______________________________________________________________________
AliITSsimulationFastPointsV0& AliITSsimulationFastPointsV0::operator=(const AliITSsimulationFastPointsV0& /*source*/){
    // Assignment operator. This is a function which is not allowed to be
    // done.
    Error("operator=","Assignment operator not allowed\n");
    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
  Float_t a1,a2; // general float.
  AliITSRecPoint rpSPD;

  rpSPD.fTracks[0]=trackNumber;
  rpSPD.fTracks[1]=-3;
  rpSPD.fTracks[2]=-3;
  rpSPD.SetX(fSx->GetMean());
  rpSPD.SetZ(fSz->GetMean());
  rpSPD.SetdEdX(e);
  rpSPD.SetQ(1.0);
  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);
  rpSPD.SetSigmaX2(a1);
  a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz;
  //  if(a1>1.E5) printf(" sigmaZ2= %e\n",a2);
  rpSPD.SetSigmaZ2(a2);

  //(mod->GetITS())->AddRecPoint(rpSPD);
  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
  Float_t a1,a2; // general float.
  AliITSRecPoint rpSDD;

  rpSDD.fTracks[0]=trackNumber;
  rpSDD.fTracks[1]=-3;
  rpSDD.fTracks[2]=-3;
  rpSDD.SetX(fSx->GetMean());
  rpSDD.SetZ(fSz->GetMean());
  rpSDD.SetdEdX(e);
  rpSDD.SetQ(kdEdXtoQ*e);
  a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx;
  //  if(a1>1.E5) printf("addSDD: layer=%d track #%d dedx=%e sigmaX2= %e ",
  //		    mod->GetLayer(),trackNumber,e,a1);
  rpSDD.SetSigmaX2(a1);
  a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz;
  //  if(a1>1.E5) printf(" sigmaZ2= %e\n",a2);
  rpSDD.SetSigmaZ2(a2);

  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
  Float_t a1,a2; // general float.
  AliITSRecPoint rpSSD;

  rpSSD.fTracks[0]=trackNumber;
  rpSSD.fTracks[1]=-3;
  rpSSD.fTracks[2]=-3;
  rpSSD.SetX(fSx->GetMean());
  rpSSD.SetZ(fSz->GetMean());
  rpSSD.SetdEdX(e);
  rpSSD.SetQ(kdEdXtoQ*e);
  a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx;
  //  if(a1>1.E5) printf("addSSD: layer=%d track #%d dedx=%e sigmaX2= %e ",
  //		    mod->GetLayer(),trackNumber,e,a1);
  rpSSD.SetSigmaX2(a1);
  a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz;
  //  if(a1>1.E5) printf(" sigmaZ2= %e RMSx=%e RMSz=%e\n",a2,fSx->GetRMS(),fSz->GetRMS());
  rpSSD.SetSigmaZ2(a2);

  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
	32	AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0()
	33	{
9de0700b	34	// default constructor
	35	fSx = 0;
	36	fSz = 0;
	37	}
	38	AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0(const char *dataType){
e8189707	39	//constructor
d0df5576	40	Info("AliITSsimulationFastPointsV0","Standard constructor %s",dataType);
e8189707	41	fSx = new AliITSstatistics(2);
	42	fSz = new AliITSstatistics(2);
	43	}
7d62fb64	44	//______________________________________________________________________
	45	AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0(const AliITSsimulationFastPointsV0 &/rec/):AliITSsimulation(/rec/){
	46	// Copy constructor.
	47
	48	Error("Copy constructor","Copy constructor not allowed");
	49
	50	}
	51	//______________________________________________________________________
	52	AliITSsimulationFastPointsV0& AliITSsimulationFastPointsV0::operator=(const AliITSsimulationFastPointsV0& /source/){
	53	// Assignment operator. This is a function which is not allowed to be
	54	// done.
	55	Error("operator=","Assignment operator not allowed\n");
	56	return *this;
	57	}
e8189707	58
	59	//----------------------------------------------------------
	60	AliITSsimulationFastPointsV0::~AliITSsimulationFastPointsV0()
	61	{
	62	//destructor
9de0700b	63	if(fSx) delete fSx;
9de0700b	64	if(fSz) delete fSz;
e8189707	65
	66	}
	67
	68	//-------------------------------------------------------------
7d62fb64	69	void AliITSsimulationFastPointsV0::CreateFastRecPoints(AliITSmodule mod,Int_t module,TRandom rndm, TClonesArray* recp) {
e8189707	70	// Fast points simulator for all of the ITS.
7d62fb64	71
e8189707	72	Int_t nhit,h,trk,ifirst;
	73	Float_t x,y,z,t,e;// local coordinate (cm) and time of flight, and dedx.
	74	Float_t x1,y1,z1;
	75	AliITShit *hit;
	76
ac74f489	77	if(rndm!=0) module=0; // fix unsued parameter warnings.
e8189707	78	fSx->Reset(); // Start out with things clearly zeroed
	79	fSz->Reset(); // Start out with things clearly zeroed
	80	e = 0.; // Start out with things clearly zeroed
	81	Double_t weight=1.;
	82	nhit = mod->GetNhits();
	83	ifirst = 1;
	84	for(h=0;h<nhit;h++){
	85	hit = mod->GetHit(h);
	86	hit->GetPositionL(x,y,z,t);
	87	if(ifirst) {x1=x;y1=y;z1=z;}
	88	e += hit->GetIonization();
	89	trk = hit->GetTrack();
	90	fSx->AddValue((Double_t)x,weight);
	91	fSz->AddValue((Double_t)z,weight);
	92	ifirst = 0;
	93	if(hit->StatusExiting()\|\| // leaving volume
	94	hit->StatusDisappeared()\|\| // interacted/decayed...
	95	hit->StatusStop() // dropped below E cuts.
	96	){ // exiting track, write out RecPoint.
	97	// if(fSz->GetRMS()>1.E-1) {
	98	// TParticle *part = hit->GetParticle();
	99	// printf("idpart %d energy %f \n",part->GetPdgCode(),part->Energy());
	100	// printf("diffx=%e diffy=%e diffz=%e\n",x-x1,y-y1,z-z1);
	101	// }
	102	switch (mod->GetLayer()){
	103	case 1: case 2: // SPDs
7d62fb64	104	AddSPD(e,mod,trk,recp);
e8189707	105	break;
e8189707	106	case 3: case 4: // SDDs
7d62fb64	107	AddSDD(e,mod,trk,recp);
e8189707	108	break;
e8189707	109	case 5: case 6: // SSDs
7d62fb64	110	AddSSD(e,mod,trk,recp);
e8189707	111	break;
	112	} // end switch
	113	fSx->Reset();
	114	fSz->Reset();
	115	e = 0.;
	116	ifirst = 1;
	117	continue;
	118	}// end if
	119	} // end for h
	120	}
	121	//_______________________________________________________________________
	122	void AliITSsimulationFastPointsV0::AddSPD(Float_t &e,
7d62fb64	123	AliITSmodule* /mod/,Int_t trackNumber,TClonesArray* recp){
d2f55a22	124	//
7d62fb64	125	TClonesArray &pt=*recp;
e8189707	126	const Float_t kmicronTocm = 1.0e-4;
	127	// const Float_t kdEdXtoQ = ;
	128	const Float_t kRMSx = 12.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
	129	const Float_t kRMSz = 70.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
	130	Float_t a1,a2; // general float.
	131	AliITSRecPoint rpSPD;
	132
	133	rpSPD.fTracks[0]=trackNumber;
517784f0	134	rpSPD.fTracks[1]=-3;
517784f0	135	rpSPD.fTracks[2]=-3;
e8189707	136	rpSPD.SetX(fSx->GetMean());
e8189707	137	rpSPD.SetZ(fSz->GetMean());
ac74f489	138	rpSPD.SetdEdX(e);
e8189707	139	rpSPD.SetQ(1.0);
	140	a1 = fSx->GetRMS(); a1 = a1; a1 += kRMSxkRMSx;
	141	// if(a1>1.E5) printf("addSPD: layer=%d track #%d dedx=%e sigmaX2= %e ",
	142	// mod->GetLayer(),trackNumber,e,a1);
	143	rpSPD.SetSigmaX2(a1);
	144	a2 = fSz->GetRMS(); a2 = a2; a2 += kRMSzkRMSz;
	145	// if(a1>1.E5) printf(" sigmaZ2= %e\n",a2);
	146	rpSPD.SetSigmaZ2(a2);
e8189707	147
7d62fb64	148	//(mod->GetITS())->AddRecPoint(rpSPD);
	149	new (pt[fNrecp]) AliITSRecPoint(rpSPD);
	150	fNrecp++;
e8189707	151	}
	152	//_______________________________________________________________________
	153	void AliITSsimulationFastPointsV0::AddSDD(Float_t &e,
7d62fb64	154	AliITSmodule* /mod/,Int_t trackNumber,TClonesArray* recp){
d2f55a22	155	//
7d62fb64	156	TClonesArray &pt=*recp;
e8189707	157	const Float_t kmicronTocm = 1.0e-4;
	158	const Float_t kdEdXtoQ = 2.778e+8;
	159	const Float_t kRMSx = 38.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
	160	const Float_t kRMSz = 28.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
	161	Float_t a1,a2; // general float.
	162	AliITSRecPoint rpSDD;
	163
	164	rpSDD.fTracks[0]=trackNumber;
517784f0	165	rpSDD.fTracks[1]=-3;
517784f0	166	rpSDD.fTracks[2]=-3;
e8189707	167	rpSDD.SetX(fSx->GetMean());
	168	rpSDD.SetZ(fSz->GetMean());
	169	rpSDD.SetdEdX(e);
	170	rpSDD.SetQ(kdEdXtoQ*e);
	171	a1 = fSx->GetRMS(); a1 = a1; a1 += kRMSxkRMSx;
	172	// if(a1>1.E5) printf("addSDD: layer=%d track #%d dedx=%e sigmaX2= %e ",
	173	// mod->GetLayer(),trackNumber,e,a1);
	174	rpSDD.SetSigmaX2(a1);
	175	a2 = fSz->GetRMS(); a2 = a2; a2 += kRMSzkRMSz;
	176	// if(a1>1.E5) printf(" sigmaZ2= %e\n",a2);
	177	rpSDD.SetSigmaZ2(a2);
e8189707	178
7d62fb64	179	new (pt[fNrecp]) AliITSRecPoint(rpSDD);
	180	fNrecp++;
	181
e8189707	182	}
	183	//_______________________________________________________________________
	184	void AliITSsimulationFastPointsV0::AddSSD(Float_t &e,
7d62fb64	185	AliITSmodule* /mod/,Int_t trackNumber,TClonesArray* recp){
d2f55a22	186	//
7d62fb64	187	TClonesArray &pt=*recp;
e8189707	188	const Float_t kmicronTocm = 1.0e-4;
	189	const Float_t kdEdXtoQ = 2.778e+8;
	190	const Float_t kRMSx = 20.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
	191	const Float_t kRMSz = 830.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
	192	Float_t a1,a2; // general float.
	193	AliITSRecPoint rpSSD;
	194
	195	rpSSD.fTracks[0]=trackNumber;
517784f0	196	rpSSD.fTracks[1]=-3;
517784f0	197	rpSSD.fTracks[2]=-3;
e8189707	198	rpSSD.SetX(fSx->GetMean());
	199	rpSSD.SetZ(fSz->GetMean());
	200	rpSSD.SetdEdX(e);
	201	rpSSD.SetQ(kdEdXtoQ*e);
	202	a1 = fSx->GetRMS(); a1 = a1; a1 += kRMSxkRMSx;
	203	// if(a1>1.E5) printf("addSSD: layer=%d track #%d dedx=%e sigmaX2= %e ",
	204	// mod->GetLayer(),trackNumber,e,a1);
	205	rpSSD.SetSigmaX2(a1);
	206	a2 = fSz->GetRMS(); a2 = a2; a2 += kRMSzkRMSz;
	207	// if(a1>1.E5) printf(" sigmaZ2= %e RMSx=%e RMSz=%e\n",a2,fSx->GetRMS(),fSz->GetRMS());
	208	rpSSD.SetSigmaZ2(a2);
e8189707	209
7d62fb64	210	new (pt[fNrecp]) AliITSRecPoint(rpSSD);
	211	fNrecp++;
	212
	213
e8189707	214	}
	215	//_______________________________________________________________________
	216