[u/mrichter/AliRoot.git] / STEER / AliLego.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 1.26  2001/05/30 12:18:13  morsch
Fastidious printf commented.

Revision 1.25  2001/05/23 11:59:46  morsch
Use RemoveAt method instead of delete to remove objects from TClonesArray.

Revision 1.24  2001/05/21 08:39:13  morsch
Use fStepBack = 1 only in debug mode.

Revision 1.23  2001/05/20 10:10:39  morsch
- Debug output at the beginning of new event and end of run.
- Filter out boundary loops.

Revision 1.22  2001/05/11 13:22:40  morsch
If run with debug option (from gAlice) geantinos are sent back and volume sequence forward/backward is compared.
Can be very verbous in some cases.

Revision 1.21  2000/12/15 10:33:59  morsch
Invert coordinates to make meaningful zylindrical plots.

Revision 1.20  2000/11/30 07:12:48  alibrary
Introducing new Rndm and QA classes

Revision 1.19  2000/10/26 14:13:05  morsch
- Change from coordinates theta, phi to general coordinates Coor1 and Coor2.
- Lego generator instance can be passed in constructor.

Revision 1.18  2000/10/02 21:28:14  fca
Removal of useless dependecies via forward declarations

Revision 1.17  2000/07/12 08:56:25  fca
Coding convention correction and warning removal

Revision 1.16  2000/05/26 08:35:03  fca
Move the check on z after z has been retrieved

Revision 1.15  2000/05/16 13:10:40  fca
New method IsNewTrack and fix for a problem in Father-Daughter relations

Revision 1.14  2000/04/27 10:38:21  fca
Correct termination of Lego Run and introduce Lego getter in AliRun

Revision 1.13  2000/04/26 10:17:31  fca
Changes in Lego for G4 compatibility

Revision 1.12  2000/04/07 11:12:33  fca
G4 compatibility changes

Revision 1.11  2000/03/22 13:42:26  fca
SetGenerator does not replace an existing generator, ResetGenerator does

Revision 1.10  2000/02/23 16:25:22  fca
AliVMC and AliGeant3 classes introduced
ReadEuclid moved from AliRun to AliModule

Revision 1.9  1999/12/03 10:54:01  fca
Fix lego summary

Revision 1.8  1999/10/01 09:54:33  fca
Correct logics for Lego StepManager

Revision 1.7  1999/09/29 09:24:29  fca
Introduction of the Copyright and cvs Log

*/

//////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////
//                            
//  Utility class to evaluate the material budget from
//  a given radius to the surface of an arbitrary cylinder
//  along radial directions from the centre:
// 
//   - radiation length
//   - Interaction length
//   - g/cm2
// 
//  Geantinos are shot in the bins in the fNtheta bins in theta
//  and fNphi bins in phi with specified rectangular limits.
//  The statistics are accumulated per
//    fRadMin < r < fRadMax    and  <0 < z < fZMax
//
//  To activate this option, you can do:
//      Root > gAlice.RunLego();
//  or  Root > .x menu.C  then select menu item "RunLego"
//  Note that when calling gAlice->RunLego, an optional list
//  of arguments may be specified.
//
//Begin_Html
/*
<img src="picts/alilego.gif">
*/
//End_Html
//
//////////////////////////////////////////////////////////////

#include "TMath.h"

#include "AliLego.h"

#include "AliDebugVolume.h"
#include "AliRun.h"
#include "AliLegoGenerator.h"
#include "AliConst.h"
#include "AliMC.h"
#include "TH2.h"
#include "../TGeant3/TGeant3.h"
#include "TString.h"
#include "TClonesArray.h"

ClassImp(AliLego)


//___________________________________________
AliLego::AliLego()
{
  //
  // Default constructor
  //
  fHistRadl = 0;
  fHistAbso = 0;
  fHistGcm2 = 0;
  fHistReta = 0;
}

//___________________________________________
AliLego::AliLego(const char *title, Int_t ntheta, Float_t thetamin, 
		 Float_t thetamax, Int_t nphi, Float_t phimin, Float_t phimax,
		 Float_t rmin, Float_t rmax, Float_t zmax)
  : TNamed("Lego Generator",title)
{
  //
  // specify the angular limits and the size of the rectangular box
  //
   fGener = new AliLegoGenerator(ntheta, thetamin, thetamax,
		       nphi, phimin, phimax, rmin, rmax, zmax);
   

   fHistRadl = new TH2F("hradl","Radiation length map",    
			ntheta,thetamin,thetamax,nphi,phimin,phimax);
   fHistAbso = new TH2F("habso","Interaction length map",  
			ntheta,thetamin,thetamax,nphi,phimin,phimax);
   fHistGcm2 = new TH2F("hgcm2","g/cm2 length map",        
			ntheta,thetamin,thetamax,nphi,phimin,phimax);
//
   fStepBack       = 0;
   fStepsBackward  = 0;
   fStepsForward   = 0;
   fStepBack       = 0;
   fVolumesFwd     = new TClonesArray("AliDebugVolume",1000);
   fVolumesBwd     = new TClonesArray("AliDebugVolume",1000);
   fDebug          = gAlice->GetDebug();
   fErrorCondition = 0;   
}

AliLego::AliLego(const char *title, AliLegoGenerator* generator)
  : TNamed("Lego Generator",title)
{
  //
  // specify the angular limits and the size of the rectangular box
  //
   fGener = generator;
   Float_t c1min, c1max, c2min, c2max;
   Int_t n1 = fGener->NCoor1();
   Int_t n2 = fGener->NCoor2();
   
   fGener->Coor1Range(c1min, c1max);
   fGener->Coor2Range(c2min, c2max);   

   fHistRadl = new TH2F("hradl","Radiation length map",    
			n2, c2min, c2max, n1, c1min, c1max);
   fHistAbso = new TH2F("habso","Interaction length map",  
			n2, c2min, c2max, n1, c1min, c1max);
   fHistGcm2 = new TH2F("hgcm2","g/cm2 length map",        
			n2, c2min, c2max, n1, c1min, c1max);
//
//
   fStepBack       = 0;
   fStepsBackward  = 0;
   fStepsForward   = 0;
   fStepBack       = 0;
   fVolumesFwd     = new TClonesArray("AliDebugVolume",1000);
   fVolumesBwd     = new TClonesArray("AliDebugVolume",1000);
   fDebug          = gAlice->GetDebug();
   fErrorCondition =0;
}

//___________________________________________
AliLego::~AliLego()
{
  //
  // Destructor
  //
  delete fHistRadl;
  delete fHistAbso;
  delete fHistGcm2;
  delete fGener;
  if (fVolumesFwd) delete fVolumesFwd;
  if (fVolumesBwd) delete fVolumesBwd;
}

//___________________________________________
void AliLego::BeginEvent()
{
  //
  // --- Set to 0 radiation length, absorption length and g/cm2 ---
  //
  fTotRadl = 0;
  fTotAbso = 0;
  fTotGcm2 = 0;

  if (fDebug) {
      if (fErrorCondition) DumpVolumes();
      fVolumesFwd->Delete();
      fVolumesBwd->Delete();
      fStepsForward    = 0;
      fStepsBackward   = 0;		  
      fErrorCondition  = 0;
      if (gAlice->CurrentTrack() == 0) fStepBack = 0;
  }
}

//___________________________________________
void AliLego::FinishEvent()
{
  //
  // Finish the event and update the histos
  //
  Double_t c1, c2;
  c1 = fGener->CurCoor1();
  c2 = fGener->CurCoor2();
  fHistRadl->Fill(c2,c1,fTotRadl);
  fHistAbso->Fill(c2,c1,fTotAbso);
  fHistGcm2->Fill(c2,c1,fTotGcm2);
}

//___________________________________________
void AliLego::FinishRun()
{
  //
  // Store histograms in current Root file
  //
  fHistRadl->Write();
  fHistAbso->Write();
  fHistGcm2->Write();

  // Delete histograms from memory
  fHistRadl->Delete(); fHistRadl=0;
  fHistAbso->Delete(); fHistAbso=0;
  fHistGcm2->Delete(); fHistGcm2=0;
  //
  if (fErrorCondition) DumpVolumes();
}

//___________________________________________
void AliLego::Copy(AliLego &lego) const
{
  //
  // Copy *this onto lego -- not implemented
  //
  Fatal("Copy","Not implemented!\n");
}

//___________________________________________
void AliLego::StepManager() {
// called from AliRun::Stepmanager from gustep.
// Accumulate the 3 parameters step by step

    static Float_t t;
    Float_t a,z,dens,radl,absl;
    Int_t i, id, copy;
    const char* vol;
    static Float_t vect[3], dir[3];
    
    TString tmp1, tmp2;
    copy = 1;
    id  = gMC->CurrentVolID(copy);
    vol = gMC->VolName(id);
    Float_t step  = gMC->TrackStep();

   TLorentzVector pos, mom; 
   gMC->TrackPosition(pos);  
   gMC->TrackMomentum(mom);
   
   Int_t status = 0;
   if (gMC->IsTrackEntering()) status = 1;
   if (gMC->IsTrackExiting())  status = 2;

   
  if (! fStepBack) {
//      printf("\n volume %s %d", vol, status);      
//
// Normal Forward stepping
//
      if (fDebug) {
//	  printf("\n steps fwd %d %s %d %f", fStepsForward, vol, fErrorCondition, step);	  

//
// store volume if different from previous
//
	  
	  TClonesArray &lvols = *fVolumesFwd;
	  if (fStepsForward > 0) {
	      AliDebugVolume* tmp = (AliDebugVolume*) (*fVolumesFwd)[fStepsForward-1];	       
	      if (tmp->IsEqual(vol, copy) && gMC->IsTrackEntering()) {
		  fStepsForward -= 2;
		  fVolumesFwd->RemoveAt(fStepsForward);
		  fVolumesFwd->RemoveAt(fStepsForward+1);		  
	      }
	  }

	  new(lvols[fStepsForward++]) 
	      AliDebugVolume(vol,copy,step,pos[0], pos[1], pos[2], status);

      } // Debug
//
// Get current material properties

      gMC->CurrentMaterial(a,z,dens,radl,absl);
      
      if (z < 1) return;
      
// --- See if we have to stop now
       if (TMath::Abs(pos[2]) > fGener->ZMax()  || 
	   pos[0]*pos[0] +pos[1]*pos[1] > fGener->RadMax()*fGener->RadMax()) {
	   if (!gMC->IsNewTrack()) {
	       // Not the first step, add past contribution
	       fTotAbso += t/absl;
	       fTotRadl += t/radl;
	       fTotGcm2 += t*dens;
	       if (fDebug) {
//
//  generate "mirror" particle flying back
//
		   fStepsBackward = fStepsForward;
	       
		   Float_t pmom[3], orig[3];
		   Float_t polar[3] = {0.,0.,0.};
		   Int_t ntr;
		   pmom[0] = -dir[0];
		   pmom[1] = -dir[1];	   
		   pmom[2] = -dir[2];
		   orig[0] =  vect[0];
		   orig[1] =  vect[1];	   
		   orig[2] =  vect[2];
		   
		   gAlice->SetTrack(1, gAlice->CurrentTrack(), 
				    0, pmom, orig, polar, 0., kPNoProcess, ntr);
	       } // debug
	       
	   } // not a new track !

	   if (fDebug) fStepBack = 1;
	   gMC->StopTrack();
	   return;
       } // outside scoring region ?
       
// --- See how long we have to go
       for(i=0;i<3;++i) {
	   vect[i]=pos[i];
	   dir[i]=mom[i];
       }
       
       t  = fGener->PropagateCylinder(vect,dir,fGener->RadMax(),fGener->ZMax());
       
       if(step) {

	   fTotAbso += step/absl;
	   fTotRadl += step/radl;
	   fTotGcm2 += step*dens;
       }
       

  } else {
      if (fDebug) {
//
// Geometry debugging
// Fly back and compare volume sequence
//
	  TClonesArray &lvols = *fVolumesBwd;
	  if (fStepsBackward < fStepsForward) {
	      AliDebugVolume* tmp = (AliDebugVolume*) (*fVolumesBwd)[fStepsBackward];	       
	      if (tmp->IsEqual(vol, copy) && gMC->IsTrackEntering()) {
		  fStepsBackward += 2;
		  fVolumesBwd->RemoveAt(fStepsBackward-1);
		  fVolumesBwd->RemoveAt(fStepsBackward-2);		  
	      }
	  } 

	  fStepsBackward--;
//	  printf("\n steps %d %s %d", fStepsBackward, vol, fErrorCondition);	  
	  if (fStepsBackward < 0) {
	      gMC->StopTrack();
	      fStepBack = 0;
	      return;
	  }
	  
	  new(lvols[fStepsBackward]) AliDebugVolume(vol,copy,step,pos[0], pos[1], pos[2], status);
	  
	  AliDebugVolume* tmp = (AliDebugVolume*) (*fVolumesFwd)[fStepsBackward];
	  if (! (tmp->IsEqual(vol, copy)) && (!fErrorCondition)) 
	  {
	      printf("\n Problem at (x,y,z): %d %f %f %f, volumes: %s %s step: %f\n", 
		     fStepsBackward, pos[0], pos[1], pos[2], tmp->GetName(), vol, step);
	      fErrorCondition = 1;
	  } 
      } // Debug
  } // bwd/fwd
}

void AliLego::DumpVolumes()
{
//
// Dump volume sequence in case of error
//
    printf("\n Dumping Volume Sequence:");
    printf("\n ==============================================");
    
    for (Int_t i = fStepsForward-1; i>=0; i--)
    {
	AliDebugVolume* tmp1 = (AliDebugVolume*) (*fVolumesFwd)[i];
	AliDebugVolume* tmp2 = (AliDebugVolume*) (*fVolumesBwd)[i];
	if (tmp1)
	printf("\n Volume Fwd: %3d: %5s (%3d) step: %12.5e (x,y,z) (%12.5e %12.5e %12.5e) status: %9s \n"
	       , i, 
	       tmp1->GetName(), tmp1->CopyNumber(), tmp1->Step(), 
	       tmp1->X(), tmp1->Y(), tmp1->Z(), tmp1->Status());
	if (tmp2 && i>= fStepsBackward)
	printf("\n Volume Bwd: %3d: %5s (%3d) step: %12.5e (x,y,z) (%12.5e %12.5e %12.5e) status: %9s \n"
	       , i, 
	       tmp2->GetName(), tmp2->CopyNumber(), tmp2->Step(), 
	       tmp2->X(), tmp2->Y(), tmp2->Z(), tmp2->Status());
	
	printf("\n ............................................................................\n");
    }
    printf("\n ==============================================\n");
}
Commit	Line	Data
4c039060	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	$Log$
899fde02	18	Revision 1.26 2001/05/30 12:18:13 morsch
	19	Fastidious printf commented.
	20
09a536f9	21	Revision 1.25 2001/05/23 11:59:46 morsch
	22	Use RemoveAt method instead of delete to remove objects from TClonesArray.
	23
5f3dc1c9	24	Revision 1.24 2001/05/21 08:39:13 morsch
	25	Use fStepBack = 1 only in debug mode.
	26
19237f5f	27	Revision 1.23 2001/05/20 10:10:39 morsch
	28	- Debug output at the beginning of new event and end of run.
	29	- Filter out boundary loops.
	30
a74d2699	31	Revision 1.22 2001/05/11 13:22:40 morsch
	32	If run with debug option (from gAlice) geantinos are sent back and volume sequence forward/backward is compared.
	33	Can be very verbous in some cases.
	34
7eb618fa	35	Revision 1.21 2000/12/15 10:33:59 morsch
	36	Invert coordinates to make meaningful zylindrical plots.
	37
10bd7535	38	Revision 1.20 2000/11/30 07:12:48 alibrary
	39	Introducing new Rndm and QA classes
	40
65fb704d	41	Revision 1.19 2000/10/26 14:13:05 morsch
	42	- Change from coordinates theta, phi to general coordinates Coor1 and Coor2.
	43	- Lego generator instance can be passed in constructor.
	44
0b27b8c7	45	Revision 1.18 2000/10/02 21:28:14 fca
	46	Removal of useless dependecies via forward declarations
	47
94de3818	48	Revision 1.17 2000/07/12 08:56:25 fca
	49	Coding convention correction and warning removal
	50
8918e700	51	Revision 1.16 2000/05/26 08:35:03 fca
	52	Move the check on z after z has been retrieved
	53
119a6af6	54	Revision 1.15 2000/05/16 13:10:40 fca
	55	New method IsNewTrack and fix for a problem in Father-Daughter relations
	56
a01a8b12	57	Revision 1.14 2000/04/27 10:38:21 fca
	58	Correct termination of Lego Run and introduce Lego getter in AliRun
	59
838edcaf	60	Revision 1.13 2000/04/26 10:17:31 fca
	61	Changes in Lego for G4 compatibility
	62
dffd31ef	63	Revision 1.12 2000/04/07 11:12:33 fca
	64	G4 compatibility changes
	65
875c717b	66	Revision 1.11 2000/03/22 13:42:26 fca
	67	SetGenerator does not replace an existing generator, ResetGenerator does
	68
ee1dd322	69	Revision 1.10 2000/02/23 16:25:22 fca
	70	AliVMC and AliGeant3 classes introduced
	71	ReadEuclid moved from AliRun to AliModule
	72
b13db077	73	Revision 1.9 1999/12/03 10:54:01 fca
	74	Fix lego summary
	75
00719c1b	76	Revision 1.8 1999/10/01 09:54:33 fca
	77	Correct logics for Lego StepManager
	78
f059c84a	79	Revision 1.7 1999/09/29 09:24:29 fca
	80	Introduction of the Copyright and cvs Log
	81
4c039060	82	*/
4c039060	83
fe4da5cc	84	//////////////////////////////////////////////////////////////
	85	//////////////////////////////////////////////////////////////
	86	//
	87	// Utility class to evaluate the material budget from
	88	// a given radius to the surface of an arbitrary cylinder
	89	// along radial directions from the centre:
	90	//
	91	// - radiation length
	92	// - Interaction length
	93	// - g/cm2
	94	//
	95	// Geantinos are shot in the bins in the fNtheta bins in theta
	96	// and fNphi bins in phi with specified rectangular limits.
	97	// The statistics are accumulated per
	98	// fRadMin < r < fRadMax and <0 < z < fZMax
	99	//
	100	// To activate this option, you can do:
	101	// Root > gAlice.RunLego();
	102	// or Root > .x menu.C then select menu item "RunLego"
	103	// Note that when calling gAlice->RunLego, an optional list
	104	// of arguments may be specified.
	105	//
	106	//Begin_Html
	107	/*
1439f98e	108	<img src="picts/alilego.gif">
fe4da5cc	109	*/
	110	//End_Html
	111	//
	112	//////////////////////////////////////////////////////////////
	113
	114	#include "TMath.h"
94de3818	115
1578254f	116	#include "AliLego.h"
a74d2699	117
7eb618fa	118	#include "AliDebugVolume.h"
7eb618fa	119	#include "AliRun.h"
8918e700	120	#include "AliLegoGenerator.h"
fe4da5cc	121	#include "AliConst.h"
875c717b	122	#include "AliMC.h"
94de3818	123	#include "TH2.h"
a74d2699	124	#include "../TGeant3/TGeant3.h"
7eb618fa	125	#include "TString.h"
	126	#include "TClonesArray.h"
	127
fe4da5cc	128	ClassImp(AliLego)
	129
	130
	131	//___________________________________________
	132	AliLego::AliLego()
	133	{
8918e700	134	//
	135	// Default constructor
	136	//
	137	fHistRadl = 0;
	138	fHistAbso = 0;
	139	fHistGcm2 = 0;
	140	fHistReta = 0;
fe4da5cc	141	}
	142
	143	//___________________________________________
0b27b8c7	144	AliLego::AliLego(const char *title, Int_t ntheta, Float_t thetamin,
0b27b8c7	145	Float_t thetamax, Int_t nphi, Float_t phimin, Float_t phimax,
b13db077	146	Float_t rmin, Float_t rmax, Float_t zmax)
b13db077	147	: TNamed("Lego Generator",title)
fe4da5cc	148	{
8918e700	149	//
	150	// specify the angular limits and the size of the rectangular box
	151	//
0b27b8c7	152	fGener = new AliLegoGenerator(ntheta, thetamin, thetamax,
b13db077	153	nphi, phimin, phimax, rmin, rmax, zmax);
b13db077	154
b13db077	155
0b27b8c7	156
b13db077	157	fHistRadl = new TH2F("hradl","Radiation length map",
0b27b8c7	158	ntheta,thetamin,thetamax,nphi,phimin,phimax);
b13db077	159	fHistAbso = new TH2F("habso","Interaction length map",
0b27b8c7	160	ntheta,thetamin,thetamax,nphi,phimin,phimax);
b13db077	161	fHistGcm2 = new TH2F("hgcm2","g/cm2 length map",
0b27b8c7	162	ntheta,thetamin,thetamax,nphi,phimin,phimax);
7eb618fa	163	//
19237f5f	164	fStepBack = 0;
	165	fStepsBackward = 0;
	166	fStepsForward = 0;
	167	fStepBack = 0;
7eb618fa	168	fVolumesFwd = new TClonesArray("AliDebugVolume",1000);
7eb618fa	169	fVolumesBwd = new TClonesArray("AliDebugVolume",1000);
19237f5f	170	fDebug = gAlice->GetDebug();
19237f5f	171	fErrorCondition = 0;
0b27b8c7	172	}
	173
	174	AliLego::AliLego(const char title, AliLegoGenerator generator)
	175	: TNamed("Lego Generator",title)
	176	{
	177	//
	178	// specify the angular limits and the size of the rectangular box
	179	//
	180	fGener = generator;
	181	Float_t c1min, c1max, c2min, c2max;
	182	Int_t n1 = fGener->NCoor1();
	183	Int_t n2 = fGener->NCoor2();
	184
	185	fGener->Coor1Range(c1min, c1max);
	186	fGener->Coor2Range(c2min, c2max);
b13db077	187
0b27b8c7	188	fHistRadl = new TH2F("hradl","Radiation length map",
10bd7535	189	n2, c2min, c2max, n1, c1min, c1max);
0b27b8c7	190	fHistAbso = new TH2F("habso","Interaction length map",
10bd7535	191	n2, c2min, c2max, n1, c1min, c1max);
0b27b8c7	192	fHistGcm2 = new TH2F("hgcm2","g/cm2 length map",
10bd7535	193	n2, c2min, c2max, n1, c1min, c1max);
7eb618fa	194	//
	195	//
	196	fStepBack = 0;
	197	fStepsBackward = 0;
	198	fStepsForward = 0;
	199	fStepBack = 0;
	200	fVolumesFwd = new TClonesArray("AliDebugVolume",1000);
	201	fVolumesBwd = new TClonesArray("AliDebugVolume",1000);
19237f5f	202	fDebug = gAlice->GetDebug();
a74d2699	203	fErrorCondition =0;
fe4da5cc	204	}
	205
	206	//___________________________________________
	207	AliLego::~AliLego()
	208	{
8918e700	209	//
	210	// Destructor
	211	//
	212	delete fHistRadl;
	213	delete fHistAbso;
	214	delete fHistGcm2;
8918e700	215	delete fGener;
7eb618fa	216	if (fVolumesFwd) delete fVolumesFwd;
7eb618fa	217	if (fVolumesBwd) delete fVolumesBwd;
fe4da5cc	218	}
fe4da5cc	219
b13db077	220	//___________________________________________
dffd31ef	221	void AliLego::BeginEvent()
b13db077	222	{
8918e700	223	//
	224	// --- Set to 0 radiation length, absorption length and g/cm2 ---
	225	//
dffd31ef	226	fTotRadl = 0;
	227	fTotAbso = 0;
	228	fTotGcm2 = 0;
19237f5f	229
a74d2699	230	if (fDebug) {
	231	if (fErrorCondition) DumpVolumes();
	232	fVolumesFwd->Delete();
	233	fVolumesBwd->Delete();
	234	fStepsForward = 0;
	235	fStepsBackward = 0;
	236	fErrorCondition = 0;
	237	if (gAlice->CurrentTrack() == 0) fStepBack = 0;
	238	}
dffd31ef	239	}
	240
	241	//___________________________________________
	242	void AliLego::FinishEvent()
	243	{
8918e700	244	//
	245	// Finish the event and update the histos
	246	//
0b27b8c7	247	Double_t c1, c2;
	248	c1 = fGener->CurCoor1();
	249	c2 = fGener->CurCoor2();
10bd7535	250	fHistRadl->Fill(c2,c1,fTotRadl);
	251	fHistAbso->Fill(c2,c1,fTotAbso);
	252	fHistGcm2->Fill(c2,c1,fTotGcm2);
b13db077	253	}
b13db077	254
dffd31ef	255	//___________________________________________
	256	void AliLego::FinishRun()
	257	{
8918e700	258	//
	259	// Store histograms in current Root file
	260	//
dffd31ef	261	fHistRadl->Write();
	262	fHistAbso->Write();
	263	fHistGcm2->Write();
dffd31ef	264
	265	// Delete histograms from memory
	266	fHistRadl->Delete(); fHistRadl=0;
	267	fHistAbso->Delete(); fHistAbso=0;
	268	fHistGcm2->Delete(); fHistGcm2=0;
a74d2699	269	//
a74d2699	270	if (fErrorCondition) DumpVolumes();
dffd31ef	271	}
dffd31ef	272
8918e700	273	//___________________________________________
	274	void AliLego::Copy(AliLego &lego) const
	275	{
	276	//
	277	// Copy *this onto lego -- not implemented
	278	//
	279	Fatal("Copy","Not implemented!\n");
	280	}
dffd31ef	281
b13db077	282	//___________________________________________
7eb618fa	283	void AliLego::StepManager() {
b13db077	284	// called from AliRun::Stepmanager from gustep.
b13db077	285	// Accumulate the 3 parameters step by step
a74d2699	286
7eb618fa	287	static Float_t t;
	288	Float_t a,z,dens,radl,absl;
	289	Int_t i, id, copy;
	290	const char* vol;
	291	static Float_t vect[3], dir[3];
a01a8b12	292
7eb618fa	293	TString tmp1, tmp2;
	294	copy = 1;
	295	id = gMC->CurrentVolID(copy);
	296	vol = gMC->VolName(id);
	297	Float_t step = gMC->TrackStep();
7eb618fa	298
7eb618fa	299	TLorentzVector pos, mom;
b13db077	300	gMC->TrackPosition(pos);
b13db077	301	gMC->TrackMomentum(mom);
7eb618fa	302
	303	Int_t status = 0;
	304	if (gMC->IsTrackEntering()) status = 1;
a74d2699	305	if (gMC->IsTrackExiting()) status = 2;
0b27b8c7	306
a74d2699	307
	308
	309
7eb618fa	310	if (! fStepBack) {
09a536f9	311	// printf("\n volume %s %d", vol, status);
7eb618fa	312	//
	313	// Normal Forward stepping
	314	//
	315	if (fDebug) {
a74d2699	316	// printf("\n steps fwd %d %s %d %f", fStepsForward, vol, fErrorCondition, step);
a74d2699	317
7eb618fa	318	//
	319	// store volume if different from previous
	320	//
	321
a74d2699	322	TClonesArray &lvols = *fVolumesFwd;
7eb618fa	323	if (fStepsForward > 0) {
7eb618fa	324	AliDebugVolume* tmp = (AliDebugVolume) (fVolumesFwd)[fStepsForward-1];
a74d2699	325	if (tmp->IsEqual(vol, copy) && gMC->IsTrackEntering()) {
a74d2699	326	fStepsForward -= 2;
5f3dc1c9	327	fVolumesFwd->RemoveAt(fStepsForward);
5f3dc1c9	328	fVolumesFwd->RemoveAt(fStepsForward+1);
a74d2699	329	}
7eb618fa	330	}
a74d2699	331
	332	new(lvols[fStepsForward++])
	333	AliDebugVolume(vol,copy,step,pos[0], pos[1], pos[2], status);
	334
7eb618fa	335	} // Debug
	336	//
	337	// Get current material properties
b13db077	338
7eb618fa	339	gMC->CurrentMaterial(a,z,dens,radl,absl);
	340
	341	if (z < 1) return;
	342
	343	// --- See if we have to stop now
	344	if (TMath::Abs(pos[2]) > fGener->ZMax() \|\|
	345	pos[0]pos[0] +pos[1]pos[1] > fGener->RadMax()*fGener->RadMax()) {
	346	if (!gMC->IsNewTrack()) {
	347	// Not the first step, add past contribution
	348	fTotAbso += t/absl;
	349	fTotRadl += t/radl;
	350	fTotGcm2 += t*dens;
7eb618fa	351	if (fDebug) {
	352	//
	353	// generate "mirror" particle flying back
	354	//
	355	fStepsBackward = fStepsForward;
	356
	357	Float_t pmom[3], orig[3];
	358	Float_t polar[3] = {0.,0.,0.};
	359	Int_t ntr;
	360	pmom[0] = -dir[0];
	361	pmom[1] = -dir[1];
	362	pmom[2] = -dir[2];
	363	orig[0] = vect[0];
	364	orig[1] = vect[1];
	365	orig[2] = vect[2];
	366
	367	gAlice->SetTrack(1, gAlice->CurrentTrack(),
	368	0, pmom, orig, polar, 0., kPNoProcess, ntr);
	369	} // debug
	370
	371	} // not a new track !
	372
19237f5f	373	if (fDebug) fStepBack = 1;
7eb618fa	374	gMC->StopTrack();
	375	return;
	376	} // outside scoring region ?
	377
b13db077	378	// --- See how long we have to go
7eb618fa	379	for(i=0;i<3;++i) {
	380	vect[i]=pos[i];
	381	dir[i]=mom[i];
	382	}
	383
	384	t = fGener->PropagateCylinder(vect,dir,fGener->RadMax(),fGener->ZMax());
	385
	386	if(step) {
19237f5f	387
7eb618fa	388	fTotAbso += step/absl;
	389	fTotRadl += step/radl;
	390	fTotGcm2 += step*dens;
	391	}
	392
	393
	394	} else {
	395	if (fDebug) {
	396	//
	397	// Geometry debugging
	398	// Fly back and compare volume sequence
	399	//
a74d2699	400	TClonesArray &lvols = *fVolumesBwd;
7eb618fa	401	if (fStepsBackward < fStepsForward) {
7eb618fa	402	AliDebugVolume* tmp = (AliDebugVolume) (fVolumesBwd)[fStepsBackward];
a74d2699	403	if (tmp->IsEqual(vol, copy) && gMC->IsTrackEntering()) {
a74d2699	404	fStepsBackward += 2;
5f3dc1c9	405	fVolumesBwd->RemoveAt(fStepsBackward-1);
5f3dc1c9	406	fVolumesBwd->RemoveAt(fStepsBackward-2);
7eb618fa	407	}
7eb618fa	408	}
a74d2699	409
7eb618fa	410	fStepsBackward--;
a74d2699	411	// printf("\n steps %d %s %d", fStepsBackward, vol, fErrorCondition);
7eb618fa	412	if (fStepsBackward < 0) {
7eb618fa	413	gMC->StopTrack();
a74d2699	414	fStepBack = 0;
7eb618fa	415	return;
	416	}
	417
7eb618fa	418	new(lvols[fStepsBackward]) AliDebugVolume(vol,copy,step,pos[0], pos[1], pos[2], status);
	419
	420	AliDebugVolume* tmp = (AliDebugVolume) (fVolumesFwd)[fStepsBackward];
	421	if (! (tmp->IsEqual(vol, copy)) && (!fErrorCondition))
	422	{
	423	printf("\n Problem at (x,y,z): %d %f %f %f, volumes: %s %s step: %f\n",
	424	fStepsBackward, pos[0], pos[1], pos[2], tmp->GetName(), vol, step);
	425	fErrorCondition = 1;
	426	}
	427	} // Debug
	428	} // bwd/fwd
b13db077	429	}
b13db077	430
a74d2699	431	void AliLego::DumpVolumes()
	432	{
	433	//
	434	// Dump volume sequence in case of error
	435	//
	436	printf("\n Dumping Volume Sequence:");
	437	printf("\n ==============================================");
	438
	439	for (Int_t i = fStepsForward-1; i>=0; i--)
	440	{
	441	AliDebugVolume* tmp1 = (AliDebugVolume) (fVolumesFwd)[i];
	442	AliDebugVolume* tmp2 = (AliDebugVolume) (fVolumesBwd)[i];
899fde02	443	if (tmp1)
899fde02	444	printf("\n Volume Fwd: %3d: %5s (%3d) step: %12.5e (x,y,z) (%12.5e %12.5e %12.5e) status: %9s \n"
a74d2699	445	, i,
	446	tmp1->GetName(), tmp1->CopyNumber(), tmp1->Step(),
	447	tmp1->X(), tmp1->Y(), tmp1->Z(), tmp1->Status());
899fde02	448	if (tmp2 && i>= fStepsBackward)
899fde02	449	printf("\n Volume Bwd: %3d: %5s (%3d) step: %12.5e (x,y,z) (%12.5e %12.5e %12.5e) status: %9s \n"
a74d2699	450	, i,
	451	tmp2->GetName(), tmp2->CopyNumber(), tmp2->Step(),
	452	tmp2->X(), tmp2->Y(), tmp2->Z(), tmp2->Status());
	453
	454	printf("\n ............................................................................\n");
	455	}
	456	printf("\n ==============================================\n");
	457	}
0b27b8c7	458
	459
	460
	461
7eb618fa	462
	463
	464