[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.                  *
 **************************************************************************/

/* $Id$ */

#include <TParticle.h>
#include <TRandom.h>

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

ClassImp(AliITSsimulationFastPointsV0)

AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0()
{
  // default constructor
  fSx = 0;
  fSz = 0;
}
AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0(const char *dataType){
  //constructor
  fSx = new AliITSstatistics(2);
  fSz = new AliITSstatistics(2);
}

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

}

//-------------------------------------------------------------
void AliITSsimulationFastPointsV0::CreateFastRecPoints(AliITSmodule *mod,Int_t module,TRandom *rndm){
  // 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;

  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);
	break;
      case 3: case 4:  // SDDs
	AddSDD(e,mod,trk);
	break;
      case 5: case 6:  // SSDs
	AddSSD(e,mod,trk);
	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){
  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(0.0);
  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);
}
//_______________________________________________________________________
void AliITSsimulationFastPointsV0::AddSDD(Float_t &e,
					 AliITSmodule *mod,Int_t trackNumber){

  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);

  (mod->GetITS())->AddRecPoint(rpSDD);
}
//_______________________________________________________________________
void AliITSsimulationFastPointsV0::AddSSD(Float_t &e,
					 AliITSmodule *mod,Int_t trackNumber){

  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);

  (mod->GetITS())->AddRecPoint(rpSSD);
}
//_______________________________________________________________________
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. *
	14	**************************************************************************/
	15
803d1ab0	16	/* $Id$ */
e8189707	17
	18	#include <TParticle.h>
	19	#include <TRandom.h>
	20
e8189707	21	#include "AliITS.h"
517784f0	22	#include "AliITShit.h"
	23	#include "AliITSRecPoint.h"
	24	#include "AliITSmodule.h"
	25	#include "AliITSgeom.h"
e8189707	26	#include "AliITSsimulationFastPointsV0.h"
	27	#include "AliITSstatistics.h"
	28
	29	ClassImp(AliITSsimulationFastPointsV0)
	30
	31	AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0()
	32	{
9de0700b	33	// default constructor
	34	fSx = 0;
	35	fSz = 0;
	36	}
	37	AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0(const char *dataType){
e8189707	38	//constructor
	39	fSx = new AliITSstatistics(2);
	40	fSz = new AliITSstatistics(2);
	41	}
	42
	43	//----------------------------------------------------------
	44	AliITSsimulationFastPointsV0::~AliITSsimulationFastPointsV0()
	45	{
	46	//destructor
9de0700b	47	if(fSx) delete fSx;
9de0700b	48	if(fSz) delete fSz;
e8189707	49
	50	}
	51
	52	//-------------------------------------------------------------
	53	void AliITSsimulationFastPointsV0::CreateFastRecPoints(AliITSmodule mod,Int_t module,TRandom rndm){
	54	// Fast points simulator for all of the ITS.
	55	Int_t nhit,h,trk,ifirst;
	56	Float_t x,y,z,t,e;// local coordinate (cm) and time of flight, and dedx.
	57	Float_t x1,y1,z1;
	58	AliITShit *hit;
	59
	60	fSx->Reset(); // Start out with things clearly zeroed
	61	fSz->Reset(); // Start out with things clearly zeroed
	62	e = 0.; // Start out with things clearly zeroed
	63	Double_t weight=1.;
	64	nhit = mod->GetNhits();
	65	ifirst = 1;
	66	for(h=0;h<nhit;h++){
	67	hit = mod->GetHit(h);
	68	hit->GetPositionL(x,y,z,t);
	69	if(ifirst) {x1=x;y1=y;z1=z;}
	70	e += hit->GetIonization();
	71	trk = hit->GetTrack();
	72	fSx->AddValue((Double_t)x,weight);
	73	fSz->AddValue((Double_t)z,weight);
	74	ifirst = 0;
	75	if(hit->StatusExiting()\|\| // leaving volume
	76	hit->StatusDisappeared()\|\| // interacted/decayed...
	77	hit->StatusStop() // dropped below E cuts.
	78	){ // exiting track, write out RecPoint.
	79	// if(fSz->GetRMS()>1.E-1) {
	80	// TParticle *part = hit->GetParticle();
	81	// printf("idpart %d energy %f \n",part->GetPdgCode(),part->Energy());
	82	// printf("diffx=%e diffy=%e diffz=%e\n",x-x1,y-y1,z-z1);
	83	// }
	84	switch (mod->GetLayer()){
	85	case 1: case 2: // SPDs
	86	AddSPD(e,mod,trk);
	87	break;
	88	case 3: case 4: // SDDs
	89	AddSDD(e,mod,trk);
	90	break;
	91	case 5: case 6: // SSDs
	92	AddSSD(e,mod,trk);
	93	break;
	94	} // end switch
	95	fSx->Reset();
	96	fSz->Reset();
	97	e = 0.;
	98	ifirst = 1;
	99	continue;
	100	}// end if
	101	} // end for h
	102	}
	103	//_______________________________________________________________________
	104	void AliITSsimulationFastPointsV0::AddSPD(Float_t &e,
	105	AliITSmodule *mod,Int_t trackNumber){
	106	const Float_t kmicronTocm = 1.0e-4;
	107	// const Float_t kdEdXtoQ = ;
	108	const Float_t kRMSx = 12.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
	109	const Float_t kRMSz = 70.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
	110	Float_t a1,a2; // general float.
	111	AliITSRecPoint rpSPD;
	112
113	rpSPD.fTracks[0]=trackNumber;
517784f0	114	rpSPD.fTracks[1]=-3;
517784f0	115	rpSPD.fTracks[2]=-3;
e8189707	116	rpSPD.SetX(fSx->GetMean());
	117	rpSPD.SetZ(fSz->GetMean());
	118	rpSPD.SetdEdX(0.0);
	119	rpSPD.SetQ(1.0);
	120	a1 = fSx->GetRMS(); a1 = a1; a1 += kRMSxkRMSx;
	121	// if(a1>1.E5) printf("addSPD: layer=%d track #%d dedx=%e sigmaX2= %e ",
	122	// mod->GetLayer(),trackNumber,e,a1);
	123	rpSPD.SetSigmaX2(a1);
	124	a2 = fSz->GetRMS(); a2 = a2; a2 += kRMSzkRMSz;
	125	// if(a1>1.E5) printf(" sigmaZ2= %e\n",a2);
	126	rpSPD.SetSigmaZ2(a2);
e8189707	127
	128	(mod->GetITS())->AddRecPoint(rpSPD);
	129	}
	130	//_______________________________________________________________________
	131	void AliITSsimulationFastPointsV0::AddSDD(Float_t &e,
	132	AliITSmodule *mod,Int_t trackNumber){
	133
	134	const Float_t kmicronTocm = 1.0e-4;
	135	const Float_t kdEdXtoQ = 2.778e+8;
	136	const Float_t kRMSx = 38.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
	137	const Float_t kRMSz = 28.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
	138	Float_t a1,a2; // general float.
	139	AliITSRecPoint rpSDD;
	140
	141	rpSDD.fTracks[0]=trackNumber;
517784f0	142	rpSDD.fTracks[1]=-3;
517784f0	143	rpSDD.fTracks[2]=-3;
e8189707	144	rpSDD.SetX(fSx->GetMean());
	145	rpSDD.SetZ(fSz->GetMean());
	146	rpSDD.SetdEdX(e);
	147	rpSDD.SetQ(kdEdXtoQ*e);
	148	a1 = fSx->GetRMS(); a1 = a1; a1 += kRMSxkRMSx;
	149	// if(a1>1.E5) printf("addSDD: layer=%d track #%d dedx=%e sigmaX2= %e ",
	150	// mod->GetLayer(),trackNumber,e,a1);
	151	rpSDD.SetSigmaX2(a1);
	152	a2 = fSz->GetRMS(); a2 = a2; a2 += kRMSzkRMSz;
	153	// if(a1>1.E5) printf(" sigmaZ2= %e\n",a2);
	154	rpSDD.SetSigmaZ2(a2);
e8189707	155
	156	(mod->GetITS())->AddRecPoint(rpSDD);
	157	}
	158	//_______________________________________________________________________
	159	void AliITSsimulationFastPointsV0::AddSSD(Float_t &e,
	160	AliITSmodule *mod,Int_t trackNumber){
	161
	162	const Float_t kmicronTocm = 1.0e-4;
	163	const Float_t kdEdXtoQ = 2.778e+8;
	164	const Float_t kRMSx = 20.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
	165	const Float_t kRMSz = 830.0*kmicronTocm; // microns->cm ITS TDR Table 1.3
	166	Float_t a1,a2; // general float.
	167	AliITSRecPoint rpSSD;
	168
	169	rpSSD.fTracks[0]=trackNumber;
517784f0	170	rpSSD.fTracks[1]=-3;
517784f0	171	rpSSD.fTracks[2]=-3;
e8189707	172	rpSSD.SetX(fSx->GetMean());
	173	rpSSD.SetZ(fSz->GetMean());
	174	rpSSD.SetdEdX(e);
	175	rpSSD.SetQ(kdEdXtoQ*e);
	176	a1 = fSx->GetRMS(); a1 = a1; a1 += kRMSxkRMSx;
	177	// if(a1>1.E5) printf("addSSD: layer=%d track #%d dedx=%e sigmaX2= %e ",
	178	// mod->GetLayer(),trackNumber,e,a1);
	179	rpSSD.SetSigmaX2(a1);
	180	a2 = fSz->GetRMS(); a2 = a2; a2 += kRMSzkRMSz;
	181	// if(a1>1.E5) printf(" sigmaZ2= %e RMSx=%e RMSz=%e\n",a2,fSx->GetRMS(),fSz->GetRMS());
	182	rpSSD.SetSigmaZ2(a2);
e8189707	183
	184	(mod->GetITS())->AddRecPoint(rpSSD);
	185	}
	186	//_______________________________________________________________________
	187