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

/*
$Log$
Revision 1.10  2002/06/10 17:30:24  nilsen
A new CreateFastRecPoints has been made and the old one made compatible.

Revision 1.9  2001/10/01 19:36:03  nilsen
fixed a compilation warning about unused variable.

Revision 1.8  2001/07/27 08:06:49  hristov
Use global gRandom generator (M.Ivanov)

Revision 1.7  2001/05/11 09:15:21  barbera
Corrected to make fast point creation working with PPR geometry

Revision 1.6  2000/10/29 18:30:14  barbera
Z resolution of pixel changed according with the default lenght of 425 microns

Revision 1.1.2.6  2000/10/29 18:29:51  barbera
Z resolution of pixel changed according with the default lenght of 425 microns

Revision 1.1.2.5  2000/10/02 16:03:20  barbera
Forward declarations added

Revision 1.4  2000/09/22 12:43:59  nilsen
Default track number set to -3 and not 0.

*/
#include <TRandom.h>

#include "AliITS.h"
#include "AliITShit.h"
#include "AliITSRecPoint.h"
#include "AliITSmodule.h"
#include "AliITSgeom.h"
#include "AliRun.h"
#include "AliITSsimulationFastPoints.h"


ClassImp(AliITSsimulationFastPoints)

AliITSsimulationFastPoints::AliITSsimulationFastPoints()
{
  //constructor
  fSigmaRPhi[0] = fSigmaRPhi[1] = 12e-4;
  fSigmaRPhi[2] = fSigmaRPhi[3] = 38e-4;
  fSigmaRPhi[4] = fSigmaRPhi[5] = 20e-4;
  fSigmaZ[0] = fSigmaZ[1] = 120e-4;        // resolution for 425 micron pixels
  fSigmaZ[2] = fSigmaZ[3] = 28e-4;
  fSigmaZ[4] = fSigmaZ[5] = 830e-4;
  fSigmaDe[0] = fSigmaDe[1] = 0.72e-6;
  fSigmaDe[2] = fSigmaDe[3] = 0.90e-6;
  fSigmaDe[4] = fSigmaDe[5] =  5e-6;
  fThrDe[0] = fThrDe[1] = 7.2e-6;
  fThrDe[2] = fThrDe[3] = 2.70e-6;
  fThrDe[4] = fThrDe[5] = 10e-6;
}

//-------------------------------------------------------------
void AliITSsimulationFastPoints::CreateFastRecPoints(Int_t module){
    // Fast points simulator
    AliITS *aliITS  = (AliITS*)gAlice->GetModule("ITS");

    CreateFastRecPoints((AliITSmodule *)(aliITS->GetModule(module)),
			module,gRandom);
}
//-------------------------------------------------------------
void AliITSsimulationFastPoints::CreateFastRecPoints(AliITSmodule *mod,
						     Int_t module,
						     TRandom *random){
    // Fast points simulator 
    AliITS *aliITS  = (AliITS*)gAlice->GetModule("ITS");
    AliITSgeom *gm = aliITS->GetITSgeom();

    const Float_t kdEdXtoQ = 2.778e+8; 

    Int_t ihit,flag,numofhits;
    Float_t locals[3];
    Float_t globals[3];
    Double_t sigmarphi=0., sigmaz=0., sigmade=0., thrde=0.;
    Float_t deltaXl,deltaZl,deltaDe;

    Int_t hitlay, hitlad, hitdet, hitstatus;
    Float_t hitpx, hitpy, hitpz, hitdestep;

    Int_t   hitstatus1, hittrack1;
    Float_t hitx1, hity1, hitz1;
    Float_t hitdestep1;
    Float_t xMg,yMg,zMg;

    numofhits = mod->GetNhits();
    //printf("numofhits %d \n",numofhits);
    for(ihit=0;ihit<numofhits;ihit++){
	AliITShit *hit=mod->GetHit(ihit);
	hit->GetPositionG(hitx1,hity1,hitz1);
	hitstatus1 = hit->GetTrackStatus();
	hitdestep1 = hit->GetIonization();
	hittrack1 = hit->GetTrack();

	mod->MedianHit(module,hitx1,hity1,hitz1,hitstatus1,xMg,yMg,zMg,flag);
	if (flag!=1) {
	    hitdestep = hit->GetIonization();

	    if (hitdestep > 0) {
		hit->GetDetectorID(hitlay,hitlad,hitdet);
		hit->GetMomentumG(hitpx,hitpy,hitpz);            
		hitstatus = hitstatus1;
		// Transform to the module local frame
		globals[0] = xMg; 
		globals[1] = yMg;
		globals[2] = zMg;
		gm->GtoL(hitlay,hitlad,hitdet,globals,locals);
		// Retrieve sigma values for position and energy, and energy
		// threshold
		sigmarphi = SigmaRPhi(hitlay);
		sigmaz = SigmaZ(hitlay);
		sigmade = SigmaDe(hitlay);
		thrde = ThrDe(hitlay);
		deltaXl = random->Gaus(0,sigmarphi);
		deltaZl = random->Gaus(0,sigmaz);
		deltaDe = random->Gaus(0,sigmade);

		// Apply energy threshold and trasform back to global reference
		// system

		if ( (hitdestep+deltaDe) > thrde ){
		    locals[0] += deltaXl;
		    locals[2] += deltaZl;
		    AliITSRecPoint rp;
		    rp.fTracks[0]=hit->GetTrack();
		    //		    rp.fTracks[0]=mod->GetHitTrackIndex(ihit);
		    rp.fTracks[1]=-3;
		    rp.fTracks[2]=-3;
		    rp.SetX(locals[0]);
		    rp.SetZ(locals[2]);
		    rp.SetdEdX(hitdestep+deltaDe);
		    rp.SetQ(kdEdXtoQ*(hitdestep+deltaDe));  // number of e
		    rp.SetSigmaX2(sigmarphi*sigmarphi);
		    rp.SetSigmaZ2(sigmaz*sigmaz);
		    aliITS->AddRecPoint(rp);
		} // end if ( (hitdestep+deltaDe)
	    } // end if (hitdestep > 0)
	} // end if (flag!=1)
    } // end for ihit
}
//_______________________________________________________________________
void AliITSsimulationFastPoints::SetSigmaRPhi(Double_t  srphi[6])
{
  // set sigmas in rphi

    Int_t i;
    for (i=0; i<6; i++) {
	fSigmaRPhi[i]=srphi[i];
    }
}
//_______________________________________________________________________
void AliITSsimulationFastPoints::SetSigmaZ(Double_t  sz[6])
{
  // set sigmas in z

    Int_t i;
    for (i=0; i<6; i++) {
	fSigmaZ[i]=sz[i];
    }
}
//_______________________________________________________________________
void AliITSsimulationFastPoints::SetSigmaDe(Double_t  sde[6])
{
  // set sigmas in energy

    Int_t i;
    for (i=0; i<6; i++) {
	fSigmaDe[i]=sde[i];
    }
}
//_______________________________________________________________________
void AliITSsimulationFastPoints::SetThrDe(Double_t  thrde[6])
{
  // set energy thersholds

    Int_t i;
    for (i=0; i<6; i++) {
	fThrDe[i]=thrde[i];
    }
}
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	**************************************************************************/
	15
	16	/*
	17	$Log$
4465d468	18	Revision 1.10 2002/06/10 17:30:24 nilsen
	19	A new CreateFastRecPoints has been made and the old one made compatible.
	20
785086f0	21	Revision 1.9 2001/10/01 19:36:03 nilsen
	22	fixed a compilation warning about unused variable.
	23
84f9ba63	24	Revision 1.8 2001/07/27 08:06:49 hristov
	25	Use global gRandom generator (M.Ivanov)
	26
4c57765b	27	Revision 1.7 2001/05/11 09:15:21 barbera
	28	Corrected to make fast point creation working with PPR geometry
	29
34980f24	30	Revision 1.6 2000/10/29 18:30:14 barbera
	31	Z resolution of pixel changed according with the default lenght of 425 microns
	32
21d3c626	33	Revision 1.1.2.6 2000/10/29 18:29:51 barbera
	34	Z resolution of pixel changed according with the default lenght of 425 microns
	35
1ca7869b	36	Revision 1.1.2.5 2000/10/02 16:03:20 barbera
	37	Forward declarations added
	38
	39	Revision 1.4 2000/09/22 12:43:59 nilsen
	40	Default track number set to -3 and not 0.
	41
b0f5e3fc	42	*/
e8189707	43	#include <TRandom.h>
b0f5e3fc	44
b0f5e3fc	45	#include "AliITS.h"
517784f0	46	#include "AliITShit.h"
	47	#include "AliITSRecPoint.h"
	48	#include "AliITSmodule.h"
	49	#include "AliITSgeom.h"
e8189707	50	#include "AliRun.h"
b0f5e3fc	51	#include "AliITSsimulationFastPoints.h"
e8189707	52
b0f5e3fc	53
	54	ClassImp(AliITSsimulationFastPoints)
	55
	56	AliITSsimulationFastPoints::AliITSsimulationFastPoints()
	57	{
	58	//constructor
e8189707	59	fSigmaRPhi[0] = fSigmaRPhi[1] = 12e-4;
	60	fSigmaRPhi[2] = fSigmaRPhi[3] = 38e-4;
	61	fSigmaRPhi[4] = fSigmaRPhi[5] = 20e-4;
21d3c626	62	fSigmaZ[0] = fSigmaZ[1] = 120e-4; // resolution for 425 micron pixels
e8189707	63	fSigmaZ[2] = fSigmaZ[3] = 28e-4;
	64	fSigmaZ[4] = fSigmaZ[5] = 830e-4;
	65	fSigmaDe[0] = fSigmaDe[1] = 0.72e-6;
	66	fSigmaDe[2] = fSigmaDe[3] = 0.90e-6;
	67	fSigmaDe[4] = fSigmaDe[5] = 5e-6;
	68	fThrDe[0] = fThrDe[1] = 7.2e-6;
	69	fThrDe[2] = fThrDe[3] = 2.70e-6;
	70	fThrDe[4] = fThrDe[5] = 10e-6;
b0f5e3fc	71	}
b0f5e3fc	72
e8189707	73	//-------------------------------------------------------------
785086f0	74	void AliITSsimulationFastPoints::CreateFastRecPoints(Int_t module){
	75	// Fast points simulator
	76	AliITS aliITS = (AliITS)gAlice->GetModule("ITS");
b0f5e3fc	77
785086f0	78	CreateFastRecPoints((AliITSmodule *)(aliITS->GetModule(module)),
	79	module,gRandom);
	80	}
	81	//-------------------------------------------------------------
	82	void AliITSsimulationFastPoints::CreateFastRecPoints(AliITSmodule *mod,
	83	Int_t module,
	84	TRandom *random){
	85	// Fast points simulator
	86	AliITS aliITS = (AliITS)gAlice->GetModule("ITS");
	87	AliITSgeom *gm = aliITS->GetITSgeom();
	88
	89	const Float_t kdEdXtoQ = 2.778e+8;
	90
	91	Int_t ihit,flag,numofhits;
	92	Float_t locals[3];
	93	Float_t globals[3];
	94	Double_t sigmarphi=0., sigmaz=0., sigmade=0., thrde=0.;
	95	Float_t deltaXl,deltaZl,deltaDe;
	96
	97	Int_t hitlay, hitlad, hitdet, hitstatus;
	98	Float_t hitpx, hitpy, hitpz, hitdestep;
	99
	100	Int_t hitstatus1, hittrack1;
	101	Float_t hitx1, hity1, hitz1;
	102	Float_t hitdestep1;
	103	Float_t xMg,yMg,zMg;
	104
	105	numofhits = mod->GetNhits();
	106	//printf("numofhits %d \n",numofhits);
	107	for(ihit=0;ihit<numofhits;ihit++){
	108	AliITShit *hit=mod->GetHit(ihit);
	109	hit->GetPositionG(hitx1,hity1,hitz1);
	110	hitstatus1 = hit->GetTrackStatus();
	111	hitdestep1 = hit->GetIonization();
	112	hittrack1 = hit->GetTrack();
	113
	114	mod->MedianHit(module,hitx1,hity1,hitz1,hitstatus1,xMg,yMg,zMg,flag);
	115	if (flag!=1) {
	116	hitdestep = hit->GetIonization();
	117
	118	if (hitdestep > 0) {
	119	hit->GetDetectorID(hitlay,hitlad,hitdet);
	120	hit->GetMomentumG(hitpx,hitpy,hitpz);
	121	hitstatus = hitstatus1;
	122	// Transform to the module local frame
	123	globals[0] = xMg;
	124	globals[1] = yMg;
	125	globals[2] = zMg;
	126	gm->GtoL(hitlay,hitlad,hitdet,globals,locals);
	127	// Retrieve sigma values for position and energy, and energy
	128	// threshold
	129	sigmarphi = SigmaRPhi(hitlay);
	130	sigmaz = SigmaZ(hitlay);
	131	sigmade = SigmaDe(hitlay);
	132	thrde = ThrDe(hitlay);
	133	deltaXl = random->Gaus(0,sigmarphi);
	134	deltaZl = random->Gaus(0,sigmaz);
	135	deltaDe = random->Gaus(0,sigmade);
	136
	137	// Apply energy threshold and trasform back to global reference
	138	// system
	139
	140	if ( (hitdestep+deltaDe) > thrde ){
	141	locals[0] += deltaXl;
142	locals[2] += deltaZl;
143	AliITSRecPoint rp;
4465d468	144	rp.fTracks[0]=hit->GetTrack();
4465d468	145	// rp.fTracks[0]=mod->GetHitTrackIndex(ihit);
785086f0	146	rp.fTracks[1]=-3;
	147	rp.fTracks[2]=-3;
	148	rp.SetX(locals[0]);
	149	rp.SetZ(locals[2]);
	150	rp.SetdEdX(hitdestep+deltaDe);
	151	rp.SetQ(kdEdXtoQ*(hitdestep+deltaDe)); // number of e
	152	rp.SetSigmaX2(sigmarphi*sigmarphi);
	153	rp.SetSigmaZ2(sigmaz*sigmaz);
	154	aliITS->AddRecPoint(rp);
	155	} // end if ( (hitdestep+deltaDe)
	156	} // end if (hitdestep > 0)
	157	} // end if (flag!=1)
	158	} // end for ihit
b0f5e3fc	159	}
e8189707	160	//_______________________________________________________________________
	161	void AliITSsimulationFastPoints::SetSigmaRPhi(Double_t srphi[6])
	162	{
	163	// set sigmas in rphi
b0f5e3fc	164
e8189707	165	Int_t i;
	166	for (i=0; i<6; i++) {
	167	fSigmaRPhi[i]=srphi[i];
	168	}
b0f5e3fc	169	}
b0f5e3fc	170	//_______________________________________________________________________
e8189707	171	void AliITSsimulationFastPoints::SetSigmaZ(Double_t sz[6])
	172	{
	173	// set sigmas in z
	174
	175	Int_t i;
	176	for (i=0; i<6; i++) {
	177	fSigmaZ[i]=sz[i];
	178	}
b0f5e3fc	179	}
b0f5e3fc	180	//_______________________________________________________________________
e8189707	181	void AliITSsimulationFastPoints::SetSigmaDe(Double_t sde[6])
	182	{
	183	// set sigmas in energy
	184
	185	Int_t i;
	186	for (i=0; i<6; i++) {
	187	fSigmaDe[i]=sde[i];
	188	}
b0f5e3fc	189	}
b0f5e3fc	190	//_______________________________________________________________________
e8189707	191	void AliITSsimulationFastPoints::SetThrDe(Double_t thrde[6])
	192	{
	193	// set energy thersholds
	194
	195	Int_t i;
	196	for (i=0; i<6; i++) {
	197	fThrDe[i]=thrde[i];
	198	}
b0f5e3fc	199	}
e8189707	200