[u/mrichter/AliRoot.git] / FMD / AliFMDv1.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.                  *
 **************************************************************************/

/* $Id$ */

//____________________________________________________________________
//                                                                          
// Forward Multiplicity Detector based on Silicon wafers. This class
// contains the base procedures for the Forward Multiplicity detector
// Detector consists of 3 sub-detectors FMD1, FMD2, and FMD3, each of
// which has 1 or 2 rings of silicon sensors. 
//                                                       
// This class contains the detailed version of the FMD - that is, hits
// are produced during simulation. 
//                                                                           
// See also the class AliFMD for a more detailed explanation of the
// various componets. 
//
#include <TVirtualMC.h>		// ROOT_TVirtualMC
#include <AliRun.h>		// ALIRUN_H
#include <AliMC.h>		// ALIMC_H
#include <AliLog.h>		// ALILOG_H
#include "AliFMDv1.h"		// ALIFMDV1_H
#include "AliFMDGeometryBuilder.h"
#include "AliFMDGeometry.h"
#include "AliFMDDetector.h"
#include "AliFMDRing.h"
#include <TParticlePDG.h>
#include <TDatabasePDG.h>
#include "AliFMDHit.h"

//____________________________________________________________________
ClassImp(AliFMDv1)
#if 0
  ; // This is here to keep Emacs for indenting the next line
#endif


//____________________________________________________________________
Bool_t
AliFMDv1::VMC2FMD(TLorentzVector& v, UShort_t& detector,
		  Char_t& ring, UShort_t& sector, UShort_t& strip) const
{
  TVirtualMC* mc = TVirtualMC::GetMC();
  AliFMDGeometry*  fmd = AliFMDGeometry::Instance();

  // Get track position
  mc->TrackPosition(v);
  Int_t moduleno; mc->CurrentVolOffID(fmd->GetModuleOff(), moduleno);
  Int_t iring;    mc->CurrentVolOffID(fmd->GetRingOff(), iring);   
  ring = Char_t(iring);
  Int_t det;      mc->CurrentVolOffID(fmd->GetDetectorOff(), det); 
  detector = det;
  

  // Get the ring geometry
  //Int_t     nsec = fmd->GetDetector(detector)->GetRing(ring)->GetNSectors();
  Int_t     nstr  = fmd->GetDetector(detector)->GetRing(ring)->GetNStrips();
  Double_t  lowr  = fmd->GetDetector(detector)->GetRing(ring)->GetMinR();
  Double_t  theta = fmd->GetDetector(detector)->GetRing(ring)->GetTheta();
  Double_t  pitch = fmd->GetDetector(detector)->GetRing(ring)->GetPitch();

  // Figure out the strip number
  Double_t r     = TMath::Sqrt(v.X() * v.X() + v.Y() * v.Y());
  Int_t    str   = Int_t((r - lowr) / pitch);
  if (str < 0 || str >= nstr) return kFALSE;
  strip          = str;

  // Figure out the sector number
  Double_t phi    = TMath::ATan2(v.Y(), v.X()) * 180. / TMath::Pi();
  if (phi < 0) phi = 360. + phi;
  Double_t t      = phi - 2 * moduleno * theta;
  sector          = 2 * moduleno;
  if (t < 0 || t > 2 * theta) return kFALSE;
  else if (t > theta)         sector += 1;

  AliDebug(40, Form("<1> Inside an active FMD volume FMD%d%c[%2d,%3d] %s",
		    detector, ring, sector, strip, mc->CurrentVolPath()));
  return kTRUE;
}

//____________________________________________________________________
Bool_t
AliFMDv1::VMC2FMD(Int_t copy, TLorentzVector& v,
		  UShort_t& detector, Char_t& ring,
		  UShort_t& sector, UShort_t& strip) const
{
  TVirtualMC* mc = TVirtualMC::GetMC();
  AliFMDGeometry* fmd = AliFMDGeometry::Instance();

  strip = copy - 1;
  Int_t sectordiv; mc->CurrentVolOffID(fmd->GetSectorOff(), sectordiv);
  if (fmd->GetModuleOff() >= 0) {
    Int_t module;    mc->CurrentVolOffID(fmd->GetModuleOff(), module);
    sector = 2 * module + sectordiv;
  }
  else 
    sector = sectordiv;
  AliDebug(30, Form("Getting ring volume with offset %d -> %s", 
		    fmd->GetRingOff(), 
		    mc->CurrentVolOffName(fmd->GetRingOff())));
  Int_t iring;     mc->CurrentVolOffID(fmd->GetRingOff(), iring); 
  ring = Char_t(iring);
  Int_t det;       mc->CurrentVolOffID(fmd->GetDetectorOff(), det); 
  detector = det;

  //Double_t  rz  = fmd->GetDetector(detector)->GetRingZ(ring);
  AliFMDDetector* gdet  = fmd->GetDetector(detector);
  AliFMDRing*     gring = gdet->GetRing(ring);
  if (!gring) {
    AliFatal(Form("Ring %c not found (volume was %s at offset %d in path %s)", 
		  ring, fmd->GetRingOff(), 
		  mc->CurrentVolOffName(fmd->GetRingOff()),
		  mc->CurrentVolPath()));
  }
  Int_t n = gring->GetNSectors();
#if 0
  if (rz < 0) {
    Int_t s = ((n - sector + n / 2) % n) + 1;
    AliDebug(1, Form("Recalculating sector to %d (=%d-%d+%d/2%%%d+1 z=%f)",
		     s, n, sector, n, n, rz));
    sector = s;
  }
#endif
  if (sector < 1 || sector > n) {
    AliWarning(Form("sector # %d out of range (0-%d)", sector-1, n-1));
    return kFALSE;
  }
  sector--;
  // Get track position
  mc->TrackPosition(v);
  AliDebug(15, Form("<2> Inside an active FMD volume FMD%d%c[%2d,%3d] %s",
		    detector, ring, sector, strip, mc->CurrentVolPath()));

  return kTRUE;
}


//____________________________________________________________________
Bool_t
AliFMDv1::CheckHit(Int_t trackno, Int_t pdg, Float_t absQ, 
		   const TLorentzVector& p, Float_t edep) const
{
  if (AliLog::GetDebugLevel("FMD", "AliFMD") < 5) return kFALSE;
  TVirtualMC* mc   = TVirtualMC::GetMC();
  Double_t mass    = mc->TrackMass();
  Double_t poverm  = (mass == 0 ? 0 : p.P() / mass);
    
  // This `if' is to debug abnormal energy depositions.  We trigger on
  // p/m approx larger than or equal to a MIP, and a large edep - more 
  // than 1 keV - a MIP is 100 eV. 
  if (!(edep > absQ * absQ && poverm > 1)) return kFALSE;
  
  TArrayI procs;
  mc->StepProcesses(procs);
  TString processes;
  for (Int_t ip = 0; ip < procs.fN; ip++) {
    if (ip != 0) processes.Append(",");
    processes.Append(TMCProcessName[procs.fArray[ip]]);
  }
  TDatabasePDG* pdgDB        = TDatabasePDG::Instance();
  TParticlePDG* particleType = pdgDB->GetParticle(pdg);
  TString pname(particleType ? particleType->GetName() : "???");
  TString what;
  if (mc->IsTrackEntering())    what.Append("entering ");
  if (mc->IsTrackExiting())     what.Append("exiting ");
  if (mc->IsTrackInside())      what.Append("inside ");
  if (mc->IsTrackDisappeared()) what.Append("disappeared ");
  if (mc->IsTrackStop())        what.Append("stopped ");
  if (mc->IsNewTrack())         what.Append("new ");
  if (mc->IsTrackAlive())       what.Append("alive ");
  if (mc->IsTrackOut())         what.Append("out ");
      
  Int_t mother = gAlice->GetMCApp()->GetPrimary(trackno);
  AliDebug(15, Form("Track # %5d deposits a lot of energy\n" 
		    "  Volume:    %s\n" 
		    "  Momentum:  (%7.4f,%7.4f,%7.4f)\n"
		    "  PDG:       %d (%s)\n" 
		    "  Edep:      %-14.7f keV (mother %d)\n"
		    "  p/m:       %-7.4f/%-7.4f = %-14.7f\n"
		    "  Processes: %s\n"
		    "  What:      %s\n",
		    trackno, mc->CurrentVolPath(), p.X(), p.Y(), p.Z(),
		    pdg, pname.Data(), edep, mother, p.P(), mass, 
		    poverm, processes.Data(), what.Data()));
  return kTRUE;
}


//____________________________________________________________________
void 
AliFMDv1::StepManager()
{
  // Member function that is executed each time a hit is made in the
  // FMD.  None-charged particles are ignored.   Dead tracks  are
  // ignored. 
  //
  // The procedure is as follows: 
  // 
  //   - IF NOT track is alive THEN RETURN ENDIF
  //   - IF NOT particle is charged THEN RETURN ENDIF
  //   - IF NOT volume name is "STRI" or "STRO" THEN RETURN ENDIF 
  //   - Get strip number (volume copy # minus 1)
  //   - Get phi division number (mother volume copy #)
  //   - Get module number (grand-mother volume copy #)
  //   - section # = 2 * module # + phi division # - 1
  //   - Get ring Id from volume name 
  //   - Get detector # from grand-grand-grand-mother volume name 
  //   - Get pointer to sub-detector object. 
  //   - Get track position 
  //   - IF track is entering volume AND track is inside real shape THEN
  //   -   Reset energy deposited 
  //   -   Get track momentum 
  //   -   Get particle ID # 
  ///  - ENDIF
  //   - IF track is inside volume AND inside real shape THEN 
  ///  -   Update energy deposited 
  //   - ENDIF 
  //   - IF track is inside real shape AND (track is leaving volume,
  //         or it died, or it is stopped  THEN
  //   -   Create a hit 
  //   - ENDIF
  //     
  TVirtualMC* mc = TVirtualMC::GetMC();
  if (!mc->IsTrackAlive()) return;
  Double_t absQ = TMath::Abs(mc->TrackCharge());
  if (absQ <= 0) return;
  
  Int_t copy;
  Int_t vol = mc->CurrentVolID(copy);
  AliFMDGeometry*  fmd = AliFMDGeometry::Instance();
  if (!fmd->IsActive(vol)) {
    AliDebug(50, Form("Not an FMD volume %d '%s'",vol,mc->CurrentVolName()));
    return;
  }
  TLorentzVector v;
  UShort_t       detector;
  Char_t         ring;
  UShort_t       sector;
  UShort_t       strip;
  
  if (fmd->IsDetailed()) {
    if (!VMC2FMD(copy, v, detector, ring, sector, strip)) return;
  } else {
    if (!VMC2FMD(v, detector, ring, sector, strip)) return;
  }
  TLorentzVector p;
  mc->TrackMomentum(p);
  Int_t    trackno = gAlice->GetMCApp()->GetCurrentTrackNumber();
  Int_t    pdg     = mc->TrackPid();
  Double_t edep    = mc->Edep() * 1000; // keV
  Bool_t   isBad   = CheckHit(trackno, pdg, absQ, p, edep);
  
  // Check that the track is actually within the active area 
  Bool_t entering = mc->IsTrackEntering();
  Bool_t inside   = mc->IsTrackInside();
  Bool_t out      = (mc->IsTrackExiting()|| mc->IsTrackDisappeared()||
		     mc->IsTrackStop());
  // Reset the energy deposition for this track, and update some of
  // our parameters.
  if (entering) {
    AliDebug(15, Form("Track # %8d entering active FMD volume %s: "
		      "Edep=%f (%f,%f,%f)", trackno, mc->CurrentVolPath(),
		      edep, v.X(), v.Y(), v.Z()));
    fCurrentP      = p;
    fCurrentV      = v;    
    fCurrentDeltaE = edep;
    fCurrentPdg    = pdg; // mc->IdFromPDG(pdg);
  }
  // If the track is inside, then update the energy deposition
  if (inside && fCurrentDeltaE >= 0) {
    fCurrentDeltaE += edep;
    AliDebug(15, Form("Track # %8d inside active FMD volume %s: Edep=%f, "
		      "Accumulated Edep=%f  (%f,%f,%f)", trackno, 
		      mc->CurrentVolPath(), edep, fCurrentDeltaE, 
		      v.X(), v.Y(), v.Z()));
  }
  // The track exits the volume, or it disappeared in the volume, or
  // the track is stopped because it no longer fulfills the cuts
  // defined, then we create a hit. 
  if (out) {
    if (fCurrentDeltaE >= 0) {
      fCurrentDeltaE += edep;
      AliDebug(15, Form("Track # %8d exiting active FMD volume %s: Edep=%g, "
			"Accumulated Edep=%g (%f,%f,%f)", trackno, 
			mc->CurrentVolPath(), edep, fCurrentDeltaE, 
			v.X(), v.Y(), v.Z()));
      TVector3 cur(v.Vect());
      cur -= fCurrentV.Vect();
      Double_t len = cur.Mag();
      AliFMDHit* h = 
	AddHitByFields(trackno, detector, ring, sector, strip,
		       fCurrentV.X(),  fCurrentV.Y(), fCurrentV.Z(),
		       fCurrentP.X(),  fCurrentP.Y(), fCurrentP.Z(), 
		       fCurrentDeltaE, fCurrentPdg,   fCurrentV.T(), 
		       len, mc->IsTrackDisappeared()||mc->IsTrackStop());
      // Add a copy 
      if (isBad && fBad) { 
	new ((*fBad)[fBad->GetEntries()]) AliFMDHit(*h);
      }
      // Check the geometry that we can get back the coordinates. 
#ifdef CHECK_TRANS
      Double_t x, y, z;
      fmd->Detector2XYZ(detector, ring, sector, strip, x, y ,z);
      AliDebug(1, Form("Hit at (%f,%f,%f), geometry says (%f,%f,%f)", 
		       fCurrentV.X(), fCurrentV.Y(), fCurrentV.Z(), x, y, z));
#endif
    }
    fCurrentDeltaE = -1;
  }
}
//___________________________________________________________________
//
// EOF
//
Commit	Line	Data
37c4363a	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	/* $Id$ */
	17
	18	//____________________________________________________________________
	19	//
	20	// Forward Multiplicity Detector based on Silicon wafers. This class
	21	// contains the base procedures for the Forward Multiplicity detector
1a1fdef7	22	// Detector consists of 3 sub-detectors FMD1, FMD2, and FMD3, each of
	23	// which has 1 or 2 rings of silicon sensors.
	24	//
37c4363a	25	// This class contains the detailed version of the FMD - that is, hits
	26	// are produced during simulation.
	27	//
37c4363a	28	// See also the class AliFMD for a more detailed explanation of the
37c4363a	29	// various componets.
1a1fdef7	30	//
56b1929b	31	#include <TVirtualMC.h> // ROOT_TVirtualMC
	32	#include <AliRun.h> // ALIRUN_H
	33	#include <AliMC.h> // ALIMC_H
	34	#include <AliLog.h> // ALILOG_H
e802be3e	35	#include "AliFMDv1.h" // ALIFMDV1_H
54e415a8	36	#include "AliFMDGeometryBuilder.h"
	37	#include "AliFMDGeometry.h"
	38	#include "AliFMDDetector.h"
	39	#include "AliFMDRing.h"
	40	#include <TParticlePDG.h>
	41	#include <TDatabasePDG.h>
	42	#include "AliFMDHit.h"
37c4363a	43
37c4363a	44	//____________________________________________________________________
925e6570	45	ClassImp(AliFMDv1)
1a1fdef7	46	#if 0
	47	; // This is here to keep Emacs for indenting the next line
	48	#endif
37c4363a	49
37c4363a	50
54e415a8	51	//____________________________________________________________________
	52	Bool_t
	53	AliFMDv1::VMC2FMD(TLorentzVector& v, UShort_t& detector,
	54	Char_t& ring, UShort_t& sector, UShort_t& strip) const
	55	{
	56	TVirtualMC* mc = TVirtualMC::GetMC();
	57	AliFMDGeometry* fmd = AliFMDGeometry::Instance();
	58
	59	// Get track position
	60	mc->TrackPosition(v);
	61	Int_t moduleno; mc->CurrentVolOffID(fmd->GetModuleOff(), moduleno);
	62	Int_t iring; mc->CurrentVolOffID(fmd->GetRingOff(), iring);
	63	ring = Char_t(iring);
	64	Int_t det; mc->CurrentVolOffID(fmd->GetDetectorOff(), det);
	65	detector = det;
	66
	67
	68	// Get the ring geometry
	69	//Int_t nsec = fmd->GetDetector(detector)->GetRing(ring)->GetNSectors();
	70	Int_t nstr = fmd->GetDetector(detector)->GetRing(ring)->GetNStrips();
	71	Double_t lowr = fmd->GetDetector(detector)->GetRing(ring)->GetMinR();
	72	Double_t theta = fmd->GetDetector(detector)->GetRing(ring)->GetTheta();
	73	Double_t pitch = fmd->GetDetector(detector)->GetRing(ring)->GetPitch();
	74
	75	// Figure out the strip number
	76	Double_t r = TMath::Sqrt(v.X() * v.X() + v.Y() * v.Y());
	77	Int_t str = Int_t((r - lowr) / pitch);
	78	if (str < 0 \|\| str >= nstr) return kFALSE;
	79	strip = str;
	80
	81	// Figure out the sector number
	82	Double_t phi = TMath::ATan2(v.Y(), v.X()) * 180. / TMath::Pi();
	83	if (phi < 0) phi = 360. + phi;
	84	Double_t t = phi - 2 * moduleno * theta;
	85	sector = 2 * moduleno;
	86	if (t < 0 \|\| t > 2 * theta) return kFALSE;
	87	else if (t > theta) sector += 1;
	88
	89	AliDebug(40, Form("<1> Inside an active FMD volume FMD%d%c[%2d,%3d] %s",
	90	detector, ring, sector, strip, mc->CurrentVolPath()));
	91	return kTRUE;
	92	}
	93
	94	//____________________________________________________________________
	95	Bool_t
	96	AliFMDv1::VMC2FMD(Int_t copy, TLorentzVector& v,
	97	UShort_t& detector, Char_t& ring,
	98	UShort_t& sector, UShort_t& strip) const
	99	{
	100	TVirtualMC* mc = TVirtualMC::GetMC();
	101	AliFMDGeometry* fmd = AliFMDGeometry::Instance();
	102
	103	strip = copy - 1;
	104	Int_t sectordiv; mc->CurrentVolOffID(fmd->GetSectorOff(), sectordiv);
	105	if (fmd->GetModuleOff() >= 0) {
	106	Int_t module; mc->CurrentVolOffID(fmd->GetModuleOff(), module);
	107	sector = 2 * module + sectordiv;
	108	}
	109	else
	110	sector = sectordiv;
bf000c32	111	AliDebug(30, Form("Getting ring volume with offset %d -> %s",
	112	fmd->GetRingOff(),
	113	mc->CurrentVolOffName(fmd->GetRingOff())));
54e415a8	114	Int_t iring; mc->CurrentVolOffID(fmd->GetRingOff(), iring);
	115	ring = Char_t(iring);
	116	Int_t det; mc->CurrentVolOffID(fmd->GetDetectorOff(), det);
	117	detector = det;
	118
	119	//Double_t rz = fmd->GetDetector(detector)->GetRingZ(ring);
088f8e79	120	AliFMDDetector* gdet = fmd->GetDetector(detector);
088f8e79	121	AliFMDRing* gring = gdet->GetRing(ring);
bf000c32	122	if (!gring) {
	123	AliFatal(Form("Ring %c not found (volume was %s at offset %d in path %s)",
	124	ring, fmd->GetRingOff(),
	125	mc->CurrentVolOffName(fmd->GetRingOff()),
	126	mc->CurrentVolPath()));
	127	}
	128	Int_t n = gring->GetNSectors();
54e415a8	129	#if 0
	130	if (rz < 0) {
	131	Int_t s = ((n - sector + n / 2) % n) + 1;
	132	AliDebug(1, Form("Recalculating sector to %d (=%d-%d+%d/2%%%d+1 z=%f)",
	133	s, n, sector, n, n, rz));
	134	sector = s;
	135	}
	136	#endif
	137	if (sector < 1 \|\| sector > n) {
8f6ee336	138	AliWarning(Form("sector # %d out of range (0-%d)", sector-1, n-1));
54e415a8	139	return kFALSE;
	140	}
	141	sector--;
	142	// Get track position
	143	mc->TrackPosition(v);
	144	AliDebug(15, Form("<2> Inside an active FMD volume FMD%d%c[%2d,%3d] %s",
	145	detector, ring, sector, strip, mc->CurrentVolPath()));
	146
	147	return kTRUE;
	148	}
bf000c32	149
	150
	151	//____________________________________________________________________
	152	Bool_t
	153	AliFMDv1::CheckHit(Int_t trackno, Int_t pdg, Float_t absQ,
	154	const TLorentzVector& p, Float_t edep) const
	155	{
	156	if (AliLog::GetDebugLevel("FMD", "AliFMD") < 5) return kFALSE;
	157	TVirtualMC* mc = TVirtualMC::GetMC();
	158	Double_t mass = mc->TrackMass();
	159	Double_t poverm = (mass == 0 ? 0 : p.P() / mass);
	160
	161	// This `if' is to debug abnormal energy depositions. We trigger on
	162	// p/m approx larger than or equal to a MIP, and a large edep - more
	163	// than 1 keV - a MIP is 100 eV.
	164	if (!(edep > absQ * absQ && poverm > 1)) return kFALSE;
	165
	166	TArrayI procs;
	167	mc->StepProcesses(procs);
	168	TString processes;
	169	for (Int_t ip = 0; ip < procs.fN; ip++) {
	170	if (ip != 0) processes.Append(",");
	171	processes.Append(TMCProcessName[procs.fArray[ip]]);
	172	}
	173	TDatabasePDG* pdgDB = TDatabasePDG::Instance();
	174	TParticlePDG* particleType = pdgDB->GetParticle(pdg);
	175	TString pname(particleType ? particleType->GetName() : "???");
	176	TString what;
	177	if (mc->IsTrackEntering()) what.Append("entering ");
	178	if (mc->IsTrackExiting()) what.Append("exiting ");
	179	if (mc->IsTrackInside()) what.Append("inside ");
	180	if (mc->IsTrackDisappeared()) what.Append("disappeared ");
	181	if (mc->IsTrackStop()) what.Append("stopped ");
	182	if (mc->IsNewTrack()) what.Append("new ");
	183	if (mc->IsTrackAlive()) what.Append("alive ");
	184	if (mc->IsTrackOut()) what.Append("out ");
	185
	186	Int_t mother = gAlice->GetMCApp()->GetPrimary(trackno);
	187	AliDebug(15, Form("Track # %5d deposits a lot of energy\n"
	188	" Volume: %s\n"
	189	" Momentum: (%7.4f,%7.4f,%7.4f)\n"
	190	" PDG: %d (%s)\n"
	191	" Edep: %-14.7f keV (mother %d)\n"
	192	" p/m: %-7.4f/%-7.4f = %-14.7f\n"
	193	" Processes: %s\n"
	194	" What: %s\n",
	195	trackno, mc->CurrentVolPath(), p.X(), p.Y(), p.Z(),
	196	pdg, pname.Data(), edep, mother, p.P(), mass,
	197	poverm, processes.Data(), what.Data()));
	198	return kTRUE;
	199	}
	200
54e415a8	201
37c4363a	202	//____________________________________________________________________
	203	void
	204	AliFMDv1::StepManager()
	205	{
54e415a8	206	// Member function that is executed each time a hit is made in the
	207	// FMD. None-charged particles are ignored. Dead tracks are
	208	// ignored.
	209	//
	210	// The procedure is as follows:
	211	//
	212	// - IF NOT track is alive THEN RETURN ENDIF
	213	// - IF NOT particle is charged THEN RETURN ENDIF
	214	// - IF NOT volume name is "STRI" or "STRO" THEN RETURN ENDIF
	215	// - Get strip number (volume copy # minus 1)
	216	// - Get phi division number (mother volume copy #)
	217	// - Get module number (grand-mother volume copy #)
	218	// - section # = 2 * module # + phi division # - 1
	219	// - Get ring Id from volume name
	220	// - Get detector # from grand-grand-grand-mother volume name
	221	// - Get pointer to sub-detector object.
	222	// - Get track position
	223	// - IF track is entering volume AND track is inside real shape THEN
	224	// - Reset energy deposited
	225	// - Get track momentum
	226	// - Get particle ID #
	227	/// - ENDIF
	228	// - IF track is inside volume AND inside real shape THEN
	229	/// - Update energy deposited
	230	// - ENDIF
	231	// - IF track is inside real shape AND (track is leaving volume,
	232	// or it died, or it is stopped THEN
	233	// - Create a hit
	234	// - ENDIF
	235	//
54e415a8	236	TVirtualMC* mc = TVirtualMC::GetMC();
	237	if (!mc->IsTrackAlive()) return;
	238	Double_t absQ = TMath::Abs(mc->TrackCharge());
	239	if (absQ <= 0) return;
	240
	241	Int_t copy;
	242	Int_t vol = mc->CurrentVolID(copy);
	243	AliFMDGeometry* fmd = AliFMDGeometry::Instance();
	244	if (!fmd->IsActive(vol)) {
	245	AliDebug(50, Form("Not an FMD volume %d '%s'",vol,mc->CurrentVolName()));
	246	return;
	247	}
	248	TLorentzVector v;
	249	UShort_t detector;
	250	Char_t ring;
	251	UShort_t sector;
	252	UShort_t strip;
	253
	254	if (fmd->IsDetailed()) {
	255	if (!VMC2FMD(copy, v, detector, ring, sector, strip)) return;
	256	} else {
	257	if (!VMC2FMD(v, detector, ring, sector, strip)) return;
	258	}
	259	TLorentzVector p;
	260	mc->TrackMomentum(p);
	261	Int_t trackno = gAlice->GetMCApp()->GetCurrentTrackNumber();
	262	Int_t pdg = mc->TrackPid();
54e415a8	263	Double_t edep = mc->Edep() * 1000; // keV
bf000c32	264	Bool_t isBad = CheckHit(trackno, pdg, absQ, p, edep);
54e415a8	265
	266	// Check that the track is actually within the active area
	267	Bool_t entering = mc->IsTrackEntering();
	268	Bool_t inside = mc->IsTrackInside();
	269	Bool_t out = (mc->IsTrackExiting()\|\| mc->IsTrackDisappeared()\|\|
	270	mc->IsTrackStop());
	271	// Reset the energy deposition for this track, and update some of
	272	// our parameters.
	273	if (entering) {
	274	AliDebug(15, Form("Track # %8d entering active FMD volume %s: "
	275	"Edep=%f (%f,%f,%f)", trackno, mc->CurrentVolPath(),
	276	edep, v.X(), v.Y(), v.Z()));
	277	fCurrentP = p;
	278	fCurrentV = v;
	279	fCurrentDeltaE = edep;
	280	fCurrentPdg = pdg; // mc->IdFromPDG(pdg);
	281	}
	282	// If the track is inside, then update the energy deposition
	283	if (inside && fCurrentDeltaE >= 0) {
	284	fCurrentDeltaE += edep;
	285	AliDebug(15, Form("Track # %8d inside active FMD volume %s: Edep=%f, "
	286	"Accumulated Edep=%f (%f,%f,%f)", trackno,
	287	mc->CurrentVolPath(), edep, fCurrentDeltaE,
	288	v.X(), v.Y(), v.Z()));
	289	}
	290	// The track exits the volume, or it disappeared in the volume, or
	291	// the track is stopped because it no longer fulfills the cuts
	292	// defined, then we create a hit.
	293	if (out) {
	294	if (fCurrentDeltaE >= 0) {
	295	fCurrentDeltaE += edep;
	296	AliDebug(15, Form("Track # %8d exiting active FMD volume %s: Edep=%g, "
	297	"Accumulated Edep=%g (%f,%f,%f)", trackno,
	298	mc->CurrentVolPath(), edep, fCurrentDeltaE,
	299	v.X(), v.Y(), v.Z()));
088f8e79	300	TVector3 cur(v.Vect());
	301	cur -= fCurrentV.Vect();
	302	Double_t len = cur.Mag();
54e415a8	303	AliFMDHit* h =
	304	AddHitByFields(trackno, detector, ring, sector, strip,
	305	fCurrentV.X(), fCurrentV.Y(), fCurrentV.Z(),
	306	fCurrentP.X(), fCurrentP.Y(), fCurrentP.Z(),
088f8e79	307	fCurrentDeltaE, fCurrentPdg, fCurrentV.T(),
088f8e79	308	len, mc->IsTrackDisappeared()\|\|mc->IsTrackStop());
54e415a8	309	// Add a copy
	310	if (isBad && fBad) {
	311	new ((fBad)[fBad->GetEntries()]) AliFMDHit(h);
	312	}
bf000c32	313	// Check the geometry that we can get back the coordinates.
	314	#ifdef CHECK_TRANS
	315	Double_t x, y, z;
	316	fmd->Detector2XYZ(detector, ring, sector, strip, x, y ,z);
	317	AliDebug(1, Form("Hit at (%f,%f,%f), geometry says (%f,%f,%f)",
	318	fCurrentV.X(), fCurrentV.Y(), fCurrentV.Z(), x, y, z));
	319	#endif
54e415a8	320	}
	321	fCurrentDeltaE = -1;
	322	}
37c4363a	323	}
	324	//___________________________________________________________________
	325	//
	326	// EOF
	327	//