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