[u/mrichter/AliRoot.git] / RICH / AliRICHDetect.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  2001/01/22 21:39:11  jbarbosa
  Several tune-ups

  Revision 1.8  2000/11/15 15:52:53  jbarbosa
  Turned on spot algorithm.

  Revision 1.7  2000/11/01 15:37:05  jbarbosa
  Updated to use its own rec. point object.

  Revision 1.6  2000/10/02 21:28:12  fca
  Removal of useless dependecies via forward declarations

  Revision 1.5  2000/06/30 16:30:28  dibari
  Disabled writing to rechits.

  Revision 1.4  2000/06/15 15:46:59  jbarbosa
  Corrected compilation errors on HP-UX (replaced pow with TMath::Power)

  Revision 1.3  2000/06/13 13:15:41  jbarbosa
  Still some code cleanup done (variable names)

  Revision 1.2  2000/06/12 15:19:30  jbarbosa
  Cleaned up version.

  Revision 1.1  2000/04/19 13:05:14  morsch
  J. Barbosa's spot reconstruction algorithm.

*/


#include "AliRICH.h"
#include "AliRICHPoints.h"
#include "AliRICHDetect.h"
#include "AliRICHHit.h"
#include "AliRICHDigit.h"
#include "AliRun.h"
#include "TParticle.h"
#include "TTree.h"
#include "TMath.h"
#include "TRandom.h"


ClassImp(AliRICHDetect)
//___________________________________________
AliRICHDetect::AliRICHDetect() : TObject()
{

// Default constructor 

    //fChambers = 0;
}

//___________________________________________
AliRICHDetect::AliRICHDetect(const char *name, const char *title)
    : TObject()
{
    
// Constructor

    /*fChambers = new TObjArray(7);
    for (Int_t i=0; i<7; i++) {
    
	(*fChambers)[i] = new AliRICHchamber();  
	
    } */     
}


void AliRICHDetect::Detect()
{  	
    
//
// Detection algorithm


  //printf("Detection started!\n");
  Float_t omega,steptheta,stepphi,x,y,cx,cy,l,aux1,aux2,aux3,maxi,maxj,maxk,max;
  //Float_t theta,phi,realomega,realtheta;
  Int_t i,j,k;
 
  
  //const Float_t Noise_Level=0;                //Noise Level in percentage of mesh points
  //const Float_t t=0.6;			//Softening of Noise Correction (factor)
  
  const Float_t kPi=3.1415927;		
  
  const Float_t kHeight=10;                     //Distance from Radiator to Pads in pads
 
  const Int_t kSpot=0;                          //number of passes with spot algorithm
  
  const Int_t kDimensionTheta=50;		//Matrix dimension for angle Detection
  const Int_t kDimensionPhi=50;
  const Int_t kDimensionOmega=50;
  
  const Float_t SPOTp=.2;		        //Percentage of spot action
  //const Int_t np=500;		                //Number of points to reconstruct elipse 
  const Float_t kMinOmega=30*kPi/180;
  const Float_t kMaxOmega=65*kPi/180;		//Maximum Cherenkov angle to identify
 
  const Float_t kCorr=.5;                       //Correction factor, accounting for aberration, refractive index, etc.
   
  Int_t point[kDimensionTheta][kDimensionPhi][kDimensionOmega];
  Int_t point1[kDimensionTheta][kDimensionPhi][kDimensionOmega];
  
  steptheta=kPi/kDimensionTheta;
  stepphi=kPi/kDimensionPhi;

  AliRICHChamber*       iChamber;
  
  AliRICH *pRICH  = (AliRICH*)gAlice->GetDetector("RICH");
  Int_t ntracks = (Int_t)gAlice->TreeH()->GetEntries();
  //Int_t ntrks = gAlice->GetNtrack();
  
  Float_t trackglob[3];
  Float_t trackloc[3];

  //printf("Got ntracks:%d\n",ntracks);
  /*TVector *xp = new TVector(1000);
  TVector *yp = new TVector(1000);
  TVector *zp = new TVector(1000);
  TVector *ptrk = new TVector(1000);
  TVector *phit = new TVector(1000);*/
  
  //printf("Area de uma elipse com teta 0 e Omega 45:%f",Area(0,45));
    
  Int_t track;
	
  for (track=0; track<ntracks;track++) {
    gAlice->ResetHits();
    gAlice->TreeH()->GetEvent(track);
    TClonesArray *pHits  = pRICH->Hits();
    if (pHits == 0) return;
    Int_t nhits = pHits->GetEntriesFast();
    if (nhits == 0) continue;
    Int_t nent=(Int_t)gAlice->TreeD()->GetEntries();
    gAlice->TreeD()->GetEvent(0);
    AliRICHHit *mHit = 0;
    AliRICHDigit *points = 0;
    //Int_t npoints=0;
    
    Int_t counter=0;
    //Initialization
    for(i=0;i<kDimensionTheta;i++)
      {
	for(j=0;j<kDimensionPhi;j++)
	  {
	    for(k=0;k<kDimensionOmega;k++)
	      {
		counter++;
		point[i][j][k]=0;
		//printf("Dimensions theta:%d, phi:%d, omega:%d",kDimensionTheta,kDimensionPhi,kDimensionOmega);
		//printf("Resetting %d %d %d, time %d\n",i,j,k,counter);
		//-Noise_Level*(Area(i*kPi/(18*dimension),k*kMaxOmega/dimension)-Area((i-1)*kPi/(18*dimension),(k-1)*kMaxOmega/dimension));
		//printf("n-%f",-Noise_Level*(Area(i*kPi/(18*dimension),k*kMaxOmega/dimension)-Area((i-1)*kPi/(18*dimension),(k-1)*kMaxOmega/dimension)));
	      }
	  }
      }
    mHit = (AliRICHHit*) pHits->UncheckedAt(0);
    //printf("Aqui vou eu\n");
    Int_t nch  = mHit->fChamber;
    //printf("Aqui fui eu\n");
    trackglob[0] = mHit->X();
    trackglob[1] = mHit->Y();
    trackglob[2] = mHit->Z();

    cx=trackglob[0];
    cy=trackglob[2];
    
    
    //printf("Chamber processed:%d\n",nch);

    printf("\nChamber %d, particle at: %3.1f %3.1f,\n",nch,trackglob[0],trackglob[2]);

    iChamber = &(pRICH->Chamber(nch-1));
    
    //printf("Nch:%d\n",nch);

    iChamber->GlobaltoLocal(trackglob,trackloc);
    
    //printf("Transformation 1: %3.1f %3.1f %3.1f\n",trackloc[0],trackloc[1],trackloc[2]);


    iChamber->LocaltoGlobal(trackloc,trackglob);
       
    //printf("Transformation 2: %3.1f %3.1f %3.1f\n",trackglob[0],trackglob[1],trackglob[2]);
    
    
    TClonesArray *pDigits = pRICH->DigitsAddress(nch-1);   
    Int_t ndigits = pDigits->GetEntriesFast();
    
    //printf("Got %d digits\n",ndigits);

    //printf("Starting calculations\n");
    
    for(Float_t theta=0;theta<kPi/18;theta+=steptheta)
      {			
	for(Float_t phi=0;phi<=kPi/3;phi+=stepphi)
	  {		       
	    for (Int_t dig=0;dig<ndigits;dig++)
	      {	
		points=(AliRICHDigit*) pDigits->UncheckedAt(dig);
		
		x=points->fPadX-cx;
		y=points->fPadY-cy;
		//printf("Loaded digit %d with coordinates x:%f, y%f\n",dig,x,y);
		//cout<<"x="<<x<<" y="<<y<<endl;
			
		if (sqrt(TMath::Power(x,2)+TMath::Power(y,2))<kHeight*tan(theta+kMaxOmega)*3/4)
		  {
		    
	
		    l=kHeight/cos(theta);
		    
		    aux1=-y*sin(phi)+x*cos(phi);
		    aux2=y*cos(phi)+x*sin(phi);
		    aux3=( TMath::Power(aux1,2)+TMath::Power(cos(theta)*aux2 ,2))/TMath::Power(sin(theta)*aux2+l,2);
			//cout<<"aux1="<<aux1<<" aux2="<<aux2<<" aux3="<<aux3;
			    
		    omega=atan(sqrt(aux3));
		    //printf("Omega: %f\n",omega);
		    
		    //cout<<"\ni="<<i<<" theta="<<Int_t(2*theta*dimension/kPi)<<" phi="<<Int_t(2*phi*dimension/kPi)<<" omega="<<Int_t(2*omega*dimension/kPi)<<endl<<endl;
		    //{Int_t lixo;cin>>lixo;}
		    if(omega<kMaxOmega && omega>kMinOmega)
		      {
			omega=omega-kMinOmega;
			//point[Int_t(2*theta*kDimensionTheta/kPi)][Int_t(2*phi*kDimensionPhi/kPi)][Int_t(kCorr*2*omega*kDimensionOmega/kMaxOmega)]+=1;	
			point[Int_t(2*theta*kDimensionTheta/kPi)][Int_t(2*phi*kDimensionPhi/kPi)][Int_t(kCorr*(omega/(kMaxOmega-kMinOmega)*kDimensionOmega))]+=1;		
		      }
		    //if(omega<kMaxOmega)point[Int_t(theta)][Int_t(phi)][Int_t(omega)]+=1;
		  }
		}
	  }
      }	
    
    
    //SPOT execute twice
    for(Int_t s=0;s<kSpot;s++)
      {
	printf("     Applying Spot algorithm, pass %d\n", s);
	
	//buffer copy
	for(i=0;i<=kDimensionTheta;i++)
	  {
	    for(j=0;j<=kDimensionPhi;j++)
	      {
		for(k=0;k<=kDimensionOmega;k++)
		  {
		    point1[i][j][k]=point[i][j][k];	
		  }
	      }
	  }

	//SPOT algorithm			
	for(i=1;i<kDimensionTheta;i++)
	  {
	    for(j=1;j<kDimensionPhi;j++)
	      {
		for(k=1;k<kDimensionOmega;k++)
		  {
		    if((point[i][k][j]>point[i-1][k][j])&&(point[i][k][j]>point[i+1][k][j])&&
		       (point[i][k][j]>point[i][k-1][j])&&(point[i][k][j]>point[i][k+1][j])&&
		       (point[i][k][j]>point[i][k][j-1])&&(point[i][k][j]>point[i][k][j+1]))
		      {
			//cout<<"SPOT"<<endl;
			//Execute SPOT on point											   	
			point1[i][j][k]+=Int_t(SPOTp*(point[i-1][k][j]+point[i+1][k][j]+point[i][k-1][j]+point[i][k+1][j]+point[i][k][j-1]+point[i][k][j+1]));    
			point1[i-1][k][j]=Int_t(SPOTp*point[i-1][k][j]);
			point1[i+1][k][j]=Int_t(SPOTp*point[i+1][k][j]);
			point1[i][k-1][j]=Int_t(SPOTp*point[i][k-1][j]);
			point1[i][k+1][j]=Int_t(SPOTp*point[i][k+1][j]);
			point1[i][k][j-1]=Int_t(SPOTp*point[i][k][j-1]);
			point1[i][k][j+1]=Int_t(SPOTp*point[i][k][j+1]);
		      }
		  }
	      }
	  }
	
	//copy from buffer copy
	for(i=1;i<kDimensionTheta;i++)
	  {
	    for(j=1;j<kDimensionPhi;j++)
	      {
		for(k=1;k<kDimensionOmega;k++)
		  {
		    point[i][j][k]=point1[i][j][k];
		    //if(point1[i][j][k] != 0)
		      //printf("Last transfer point: %d, point1, %d\n",point[i][j][k],point1[i][j][k]);
		  }
	      }
	  }
      }
    
    
    //Identification is equivalent to maximum determination
    max=0;maxi=0;maxj=0;maxk=0;
    
    printf("     Proceeding to identification");
    
    for(i=1;i<kDimensionTheta-3;i++)
      for(j=1;j<=kDimensionPhi-3;j++)
	for(k=0;k<=kDimensionOmega;k++)
	    if(point[i][j][k]>max)
	      {
		//cout<<"maxi="<<i*90/dimension<<" maxj="<<j*90/dimension<<" maxk="<<k*kMaxOmega/dimension*180/kPi<<" max="<<max<<endl;
		maxi=i;maxj=j;maxk=k;
		max=point[i][j][k];
		printf(".");
		//printf("Max Omega %f, Max Theta %f, Max Phi %f\n",maxk,maxi,maxj);
	      }
    printf("\n");
    
    maxk=maxk*(kMaxOmega-kMinOmega)/kDimensionOmega + kMinOmega;

    
    //printf("Detected angle for height %3.1f and for center %3.1f %3.1f:%f\n",h,cx,cy,maxk*kPi/(kDimensionTheta*4));
    printf("     Indentified cerenkov angle: %f\n", maxk);
    //printf("Detected angle for height %3.1f and for center %3.1f %3.1f:%f\n",kHeight,cx,cy,maxk);


    //fscanf(omegas,"%f",&realomega);
    //fscanf(thetas,"%f",&realtheta);
    //printf("Real Omega: %f",realomega);			
    //cout<<"Detected:theta="<<maxi*90/kDimensionTheta<<"phi="<<maxj*90/kDimensionPhi<<"omega="<<maxk*kMaxOmega/kDimensionOmega*180/kPi<<" OmegaError="<<fabs(maxk*kMaxOmega/kDimensionOmega*180/kPi-realomega)<<" ThetaError="<<fabs(maxi*90/kDimensionTheta-realtheta)<<endl<<endl;		
    
    //fprintf(results,"Center Coordinates, cx=%6.2f cy=%6.2f, Real Omega=%6.2f, Detected Omega=%6.2f, Omega Error=%6.2f Theta Error=%6.2f\n",cx,cy,realomega,maxk*kMaxOmega/kDimensionOmega*180/kPi,fabs(maxk*kMaxOmega/kDimensionOmega*180/kPi-realomega),fabs(maxi*90/kDimensionTheta-realtheta));
    
    /*for(j=0;j<np;j++)
      pointpp(maxj*90/kDimensionTheta,maxi*90/kDimensionPhi,maxk*kMaxOmega/kDimensionOmega*180/kPi,cx,cy);//Generates a point on the elipse*/		    


    //Start filling rec. hits
    
    Float_t rechit[6];
    
    rechit[0] = (Float_t)( maxi*kPi/(kDimensionTheta*4));
    rechit[1]   = (Float_t)( maxj*kPi/(kDimensionPhi*4));
    rechit[2] = (Float_t)( maxk);
    //rechit[0] = (Float_t)( maxi);
    //rechit[1]   = (Float_t)( maxj);
    //rechit[2] = (Float_t)( maxk);
    rechit[3] = cx;
    rechit[4] = cy;
    rechit[5] = 0.5;
    
    //printf ("track %d, theta %f, phi %f, omega %f\n\n\n",track,rechit[0],rechit[1],rechit[2]);
    
    // fill rechits
    pRICH->AddRecHit3D(nch-1,rechit);
    //printf("Chamber:%d",nch);
  }			
  //printf("\n\n\n\n");
  gAlice->TreeR()->Fill();
  //TTree *TR=gAlice->TreeR();
  //Stat_t ndig=TR->GetEntries();
  TClonesArray *fRec;
  for (i=0;i<kNCH;i++) {
    fRec=pRICH->RecHitsAddress3D(i);
    int ndig=fRec->GetEntriesFast();
    printf ("Chamber %d, rings %d\n",i,ndig);
  }
  //printf("Number of rec. hits: %d",ndig);
  pRICH->ResetRecHits3D();
  //char hname[30];
  //sprintf(hname,"TreeR%d",track);
  //gAlice->TreeR()->Write(hname);
	
}

Float_t AliRICHDetect:: Area(Float_t theta,Float_t omega)
{

//
// Calculates area of an ellipse for given incidence angles    


    Float_t area;
    const Float_t kHeight=9.25;                       //Distance from Radiator to Pads in pads
    
    area=TMath::Pi()*TMath::Power(kHeight*tan(omega),2)/TMath::Power(TMath::Power(cos(theta),2)-TMath::Power(tan(omega)*sin(theta),2),3/2);
    
    return (area);
}

/*Int_t ***AliRICHDetect::i3tensor(long nrl, long nrh, long ncl, long nch, long ndl, long ndh)
// allocate a Float_t 3tensor with range t[nrl..nrh][ncl..nch][ndl..ndh] 
{
long i,j,nrow=nrh-nrl+1,ncol=nch-ncl+1,ndep=ndh-ndl+1;
Int_t ***t;

// allocate pointers to pointers to rows 
t=(Int_t ***) malloc((size_t)((nrow+NR_END)*sizeof(Int_t**)));
if (!t) printf("allocation failure 1 in f3tensor()");
t += NR_END;
t -= nrl;

// allocate pointers to rows and set pointers to them 
t[nrl]=(Int_t **) malloc((size_t)((nrow*ncol+NR_END)*sizeof(Int_t*)));
if (!t[nrl]) printf("allocation failure 2 in f3tensor()");
t[nrl] += NR_END;
t[nrl] -= ncl;

// allocate rows and set pointers to them 
t[nrl][ncl]=(Int_t *) malloc((size_t)((nrow*ncol*ndep+NR_END)*sizeof(Int_t)));
if (!t[nrl][ncl]) printf("allocation failure 3 in f3tensor()");
t[nrl][ncl] += NR_END;
t[nrl][ncl] -= ndl;

for(j=ncl+1;j<=nch;j++) t[nrl][j]=t[nrl][j-1]+ndep;
for(i=nrl+1;i<=nrh;i++) {
t[i]=t[i-1]+ncol;
t[i][ncl]=t[i-1][ncl]+ncol*ndep;
for(j=ncl+1;j<=nch;j++) t[i][j]=t[i][j-1]+ndep;
}

// return pointer to array of pointers to rows 
return t;
}*/

/*void pointpp(Float_t alfa,Float_t theta,Float_t omega,Float_t cx,Float_t cy)
  {
  Int_t s;
  Float_t fiducial=h*tan((omega+theta)*kPi/180),l=h/cos(theta*kPi/180),xtrial,y,c0,c1,c2;
  
  //cout<<"fiducial="<<fiducial<<endl;
  
  c0=0;c1=0;c2=0;
  while((c1*c1-4*c2*c0)<=0)
  {	
  //Choose which side to go...
  if(aleat(1)>.5) s=1; else s=-1;
  //Trial a y
  y=s*aleat(fiducial);		
  Float_t alfa1=alfa*kPi/180;
  Float_t theta1=theta*kPi/180;
  Float_t omega1=omega*kPi/180;
  //Solve the eq for a trial x
  c0=-TMath::Power(y*cos(alfa1)*cos(theta1),2)-TMath::Power(y*sin(alfa1),2)+TMath::Power(l*tan(omega1),2)+2*l*y*cos(alfa1)*sin(theta1)*TMath::Power(tan(omega1),2)+TMath::Power(y*cos(alfa1)*sin(theta1)*tan(omega1),2);
  c1=2*y*cos(alfa1)*sin(alfa1)-2*y*cos(alfa1)*TMath::Power(cos(theta1),2)*sin(alfa1)+2*l*sin(alfa1)*sin(theta1)*TMath::Power(tan(omega1),2)+2*y*cos(alfa1)*sin(alfa1)*TMath::Power(sin(theta1),2)*TMath::Power(tan(omega1),2);
  c2=-TMath::Power(cos(alfa1),2)-TMath::Power(cos(theta1)*sin(alfa1),2)+TMath::Power(sin(alfa1)*sin(theta1)*tan(omega1),2);
  //cout<<"Trial: y="<<y<<"c0="<<c0<<" c1="<<c1<<" c2="<<c2<<endl;
  }
  //Choose which side to go...
  if(aleat(1)>.5) s=1; else s=-1;
  xtrial=cx+(-c1+s*sqrt(c1*c1-4*c2*c0))/(2*c2);
  //cout<<"x="<<xtrial<<" y="<<cy+y<<endl;
  fprintf(final,"%f %f\n",xtrial,cy+y);
  }*/
Commit	Line	Data
c1076715	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	$Log$
a5886574	18	Revision 1.9 2001/01/22 21:39:11 jbarbosa
	19	Several tune-ups
	20
eb1ee126	21	Revision 1.8 2000/11/15 15:52:53 jbarbosa
	22	Turned on spot algorithm.
	23
ceccff49	24	Revision 1.7 2000/11/01 15:37:05 jbarbosa
	25	Updated to use its own rec. point object.
	26
4a5c8776	27	Revision 1.6 2000/10/02 21:28:12 fca
	28	Removal of useless dependecies via forward declarations
	29
94de3818	30	Revision 1.5 2000/06/30 16:30:28 dibari
	31	Disabled writing to rechits.
	32
a366fdbe	33	Revision 1.4 2000/06/15 15:46:59 jbarbosa
	34	Corrected compilation errors on HP-UX (replaced pow with TMath::Power)
	35
00df6e79	36	Revision 1.3 2000/06/13 13:15:41 jbarbosa
	37	Still some code cleanup done (variable names)
	38
3a3df9e3	39	Revision 1.2 2000/06/12 15:19:30 jbarbosa
	40	Cleaned up version.
	41
237c933d	42	Revision 1.1 2000/04/19 13:05:14 morsch
	43	J. Barbosa's spot reconstruction algorithm.
	44
c1076715	45	*/
	46
	47
	48	#include "AliRICH.h"
	49	#include "AliRICHPoints.h"
	50	#include "AliRICHDetect.h"
237c933d	51	#include "AliRICHHit.h"
237c933d	52	#include "AliRICHDigit.h"
c1076715	53	#include "AliRun.h"
c1076715	54	#include "TParticle.h"
94de3818	55	#include "TTree.h"
c1076715	56	#include "TMath.h"
	57	#include "TRandom.h"
	58
	59
	60
	61	ClassImp(AliRICHDetect)
	62	//___________________________________________
	63	AliRICHDetect::AliRICHDetect() : TObject()
	64	{
237c933d	65
	66	// Default constructor
	67
c1076715	68	//fChambers = 0;
	69	}
	70
	71	//___________________________________________
	72	AliRICHDetect::AliRICHDetect(const char name, const char title)
	73	: TObject()
	74	{
	75
237c933d	76	// Constructor
237c933d	77
c1076715	78	/*fChambers = new TObjArray(7);
	79	for (Int_t i=0; i<7; i++) {
	80
	81	(*fChambers)[i] = new AliRICHchamber();
	82
	83	} */
	84	}
	85
	86
	87	void AliRICHDetect::Detect()
	88	{
	89
237c933d	90	//
	91	// Detection algorithm
	92
	93
c1076715	94	//printf("Detection started!\n");
3a3df9e3	95	Float_t omega,steptheta,stepphi,x,y,cx,cy,l,aux1,aux2,aux3,maxi,maxj,maxk,max;
c1076715	96	//Float_t theta,phi,realomega,realtheta;
c1076715	97	Int_t i,j,k;
ceccff49	98
c1076715	99
eb1ee126	100	//const Float_t Noise_Level=0; //Noise Level in percentage of mesh points
c1076715	101	//const Float_t t=0.6; //Softening of Noise Correction (factor)
c1076715	102
3a3df9e3	103	const Float_t kPi=3.1415927;
c1076715	104
eb1ee126	105	const Float_t kHeight=10; //Distance from Radiator to Pads in pads
ceccff49	106
eb1ee126	107	const Int_t kSpot=0; //number of passes with spot algorithm
c1076715	108
ceccff49	109	const Int_t kDimensionTheta=50; //Matrix dimension for angle Detection
	110	const Int_t kDimensionPhi=50;
	111	const Int_t kDimensionOmega=50;
c1076715	112
eb1ee126	113	const Float_t SPOTp=.2; //Percentage of spot action
	114	//const Int_t np=500; //Number of points to reconstruct elipse
	115	const Float_t kMinOmega=30*kPi/180;
3a3df9e3	116	const Float_t kMaxOmega=65*kPi/180; //Maximum Cherenkov angle to identify
eb1ee126	117
	118	const Float_t kCorr=.5; //Correction factor, accounting for aberration, refractive index, etc.
	119
3a3df9e3	120	Int_t point[kDimensionTheta][kDimensionPhi][kDimensionOmega];
ceccff49	121	Int_t point1[kDimensionTheta][kDimensionPhi][kDimensionOmega];
c1076715	122
3a3df9e3	123	steptheta=kPi/kDimensionTheta;
3a3df9e3	124	stepphi=kPi/kDimensionPhi;
c1076715	125
	126	AliRICHChamber* iChamber;
	127
3a3df9e3	128	AliRICH pRICH = (AliRICH)gAlice->GetDetector("RICH");
c1076715	129	Int_t ntracks = (Int_t)gAlice->TreeH()->GetEntries();
	130	//Int_t ntrks = gAlice->GetNtrack();
	131
	132	Float_t trackglob[3];
	133	Float_t trackloc[3];
	134
	135	//printf("Got ntracks:%d\n",ntracks);
	136	/TVector xp = new TVector(1000);
	137	TVector *yp = new TVector(1000);
	138	TVector *zp = new TVector(1000);
	139	TVector *ptrk = new TVector(1000);
	140	TVector phit = new TVector(1000);/
	141
	142	//printf("Area de uma elipse com teta 0 e Omega 45:%f",Area(0,45));
	143
4a5c8776	144	Int_t track;
c1076715	145
4a5c8776	146	for (track=0; track<ntracks;track++) {
c1076715	147	gAlice->ResetHits();
c1076715	148	gAlice->TreeH()->GetEvent(track);
3a3df9e3	149	TClonesArray *pHits = pRICH->Hits();
	150	if (pHits == 0) return;
	151	Int_t nhits = pHits->GetEntriesFast();
c1076715	152	if (nhits == 0) continue;
c1076715	153	Int_t nent=(Int_t)gAlice->TreeD()->GetEntries();
a5886574	154	gAlice->TreeD()->GetEvent(0);
c1076715	155	AliRICHHit *mHit = 0;
	156	AliRICHDigit *points = 0;
	157	//Int_t npoints=0;
	158
	159	Int_t counter=0;
	160	//Initialization
3a3df9e3	161	for(i=0;i<kDimensionTheta;i++)
c1076715	162	{
3a3df9e3	163	for(j=0;j<kDimensionPhi;j++)
c1076715	164	{
3a3df9e3	165	for(k=0;k<kDimensionOmega;k++)
c1076715	166	{
c1076715	167	counter++;
3a3df9e3	168	point[i][j][k]=0;
3a3df9e3	169	//printf("Dimensions theta:%d, phi:%d, omega:%d",kDimensionTheta,kDimensionPhi,kDimensionOmega);
c1076715	170	//printf("Resetting %d %d %d, time %d\n",i,j,k,counter);
3a3df9e3	171	//-Noise_Level(Area(ikPi/(18dimension),kkMaxOmega/dimension)-Area((i-1)kPi/(18dimension),(k-1)*kMaxOmega/dimension));
3a3df9e3	172	//printf("n-%f",-Noise_Level(Area(ikPi/(18dimension),kkMaxOmega/dimension)-Area((i-1)kPi/(18dimension),(k-1)*kMaxOmega/dimension)));
c1076715	173	}
	174	}
	175	}
3a3df9e3	176	mHit = (AliRICHHit*) pHits->UncheckedAt(0);
c1076715	177	//printf("Aqui vou eu\n");
	178	Int_t nch = mHit->fChamber;
	179	//printf("Aqui fui eu\n");
94de3818	180	trackglob[0] = mHit->X();
	181	trackglob[1] = mHit->Y();
	182	trackglob[2] = mHit->Z();
c1076715	183
	184	cx=trackglob[0];
	185	cy=trackglob[2];
	186
	187
	188	//printf("Chamber processed:%d\n",nch);
ceccff49	189
ceccff49	190	printf("\nChamber %d, particle at: %3.1f %3.1f,\n",nch,trackglob[0],trackglob[2]);
c1076715	191
3a3df9e3	192	iChamber = &(pRICH->Chamber(nch-1));
c1076715	193
	194	//printf("Nch:%d\n",nch);
	195
	196	iChamber->GlobaltoLocal(trackglob,trackloc);
	197
3a3df9e3	198	//printf("Transformation 1: %3.1f %3.1f %3.1f\n",trackloc[0],trackloc[1],trackloc[2]);
c1076715	199
	200
	201	iChamber->LocaltoGlobal(trackloc,trackglob);
	202
3a3df9e3	203	//printf("Transformation 2: %3.1f %3.1f %3.1f\n",trackglob[0],trackglob[1],trackglob[2]);
c1076715	204
	205
	206
	207
3a3df9e3	208	TClonesArray *pDigits = pRICH->DigitsAddress(nch-1);
3a3df9e3	209	Int_t ndigits = pDigits->GetEntriesFast();
c1076715	210
	211	//printf("Got %d digits\n",ndigits);
	212
	213	//printf("Starting calculations\n");
	214
3a3df9e3	215	for(Float_t theta=0;theta<kPi/18;theta+=steptheta)
c1076715	216	{
3a3df9e3	217	for(Float_t phi=0;phi<=kPi/3;phi+=stepphi)
c1076715	218	{
	219	for (Int_t dig=0;dig<ndigits;dig++)
	220	{
3a3df9e3	221	points=(AliRICHDigit*) pDigits->UncheckedAt(dig);
c1076715	222
	223	x=points->fPadX-cx;
	224	y=points->fPadY-cy;
	225	//printf("Loaded digit %d with coordinates x:%f, y%f\n",dig,x,y);
	226	//cout<<"x="<<x<<" y="<<y<<endl;
eb1ee126	227
00df6e79	228	if (sqrt(TMath::Power(x,2)+TMath::Power(y,2))<kHeighttan(theta+kMaxOmega)3/4)
c1076715	229	{
c1076715	230
eb1ee126	231
3a3df9e3	232	l=kHeight/cos(theta);
c1076715	233
	234	aux1=-ysin(phi)+xcos(phi);
	235	aux2=ycos(phi)+xsin(phi);
00df6e79	236	aux3=( TMath::Power(aux1,2)+TMath::Power(cos(theta)aux2 ,2))/TMath::Power(sin(theta)aux2+l,2);
eb1ee126	237	//cout<<"aux1="<<aux1<<" aux2="<<aux2<<" aux3="<<aux3;
eb1ee126	238
3a3df9e3	239	omega=atan(sqrt(aux3));
3a3df9e3	240	//printf("Omega: %f\n",omega);
c1076715	241
3a3df9e3	242	//cout<<"\ni="<<i<<" theta="<<Int_t(2thetadimension/kPi)<<" phi="<<Int_t(2phidimension/kPi)<<" omega="<<Int_t(2omegadimension/kPi)<<endl<<endl;
c1076715	243	//{Int_t lixo;cin>>lixo;}
eb1ee126	244	if(omega<kMaxOmega && omega>kMinOmega)
	245	{
	246	omega=omega-kMinOmega;
	247	//point[Int_t(2thetakDimensionTheta/kPi)][Int_t(2phikDimensionPhi/kPi)][Int_t(kCorr2omega*kDimensionOmega/kMaxOmega)]+=1;
	248	point[Int_t(2thetakDimensionTheta/kPi)][Int_t(2phikDimensionPhi/kPi)][Int_t(kCorr(omega/(kMaxOmega-kMinOmega)kDimensionOmega))]+=1;
	249	}
3a3df9e3	250	//if(omega<kMaxOmega)point[Int_t(theta)][Int_t(phi)][Int_t(omega)]+=1;
c1076715	251	}
	252	}
	253	}
	254	}
	255
	256
c1076715	257	//SPOT execute twice
ceccff49	258	for(Int_t s=0;s<kSpot;s++)
c1076715	259	{
ceccff49	260	printf(" Applying Spot algorithm, pass %d\n", s);
ceccff49	261
c1076715	262	//buffer copy
3a3df9e3	263	for(i=0;i<=kDimensionTheta;i++)
ceccff49	264	{
	265	for(j=0;j<=kDimensionPhi;j++)
	266	{
	267	for(k=0;k<=kDimensionOmega;k++)
	268	{
	269	point1[i][j][k]=point[i][j][k];
	270	}
	271	}
	272	}
	273
c1076715	274	//SPOT algorithm
3a3df9e3	275	for(i=1;i<kDimensionTheta;i++)
ceccff49	276	{
ceccff49	277	for(j=1;j<kDimensionPhi;j++)
c1076715	278	{
ceccff49	279	for(k=1;k<kDimensionOmega;k++)
c1076715	280	{
ceccff49	281	if((point[i][k][j]>point[i-1][k][j])&&(point[i][k][j]>point[i+1][k][j])&&
	282	(point[i][k][j]>point[i][k-1][j])&&(point[i][k][j]>point[i][k+1][j])&&
	283	(point[i][k][j]>point[i][k][j-1])&&(point[i][k][j]>point[i][k][j+1]))
	284	{
	285	//cout<<"SPOT"<<endl;
	286	//Execute SPOT on point
	287	point1[i][j][k]+=Int_t(SPOTp*(point[i-1][k][j]+point[i+1][k][j]+point[i][k-1][j]+point[i][k+1][j]+point[i][k][j-1]+point[i][k][j+1]));
	288	point1[i-1][k][j]=Int_t(SPOTp*point[i-1][k][j]);
	289	point1[i+1][k][j]=Int_t(SPOTp*point[i+1][k][j]);
	290	point1[i][k-1][j]=Int_t(SPOTp*point[i][k-1][j]);
	291	point1[i][k+1][j]=Int_t(SPOTp*point[i][k+1][j]);
	292	point1[i][k][j-1]=Int_t(SPOTp*point[i][k][j-1]);
	293	point1[i][k][j+1]=Int_t(SPOTp*point[i][k][j+1]);
	294	}
c1076715	295	}
c1076715	296	}
ceccff49	297	}
ceccff49	298
c1076715	299	//copy from buffer copy
3a3df9e3	300	for(i=1;i<kDimensionTheta;i++)
ceccff49	301	{
	302	for(j=1;j<kDimensionPhi;j++)
	303	{
	304	for(k=1;k<kDimensionOmega;k++)
	305	{
	306	point[i][j][k]=point1[i][j][k];
	307	//if(point1[i][j][k] != 0)
	308	//printf("Last transfer point: %d, point1, %d\n",point[i][j][k],point1[i][j][k]);
	309	}
	310	}
	311	}
	312	}
c1076715	313
	314
	315	//Identification is equivalent to maximum determination
	316	max=0;maxi=0;maxj=0;maxk=0;
	317
ceccff49	318	printf(" Proceeding to identification");
c1076715	319
3a3df9e3	320	for(i=1;i<kDimensionTheta-3;i++)
	321	for(j=1;j<=kDimensionPhi-3;j++)
	322	for(k=0;k<=kDimensionOmega;k++)
ceccff49	323	if(point[i][j][k]>max)
	324	{
	325	//cout<<"maxi="<<i90/dimension<<" maxj="<<j90/dimension<<" maxk="<<kkMaxOmega/dimension180/kPi<<" max="<<max<<endl;
	326	maxi=i;maxj=j;maxk=k;
	327	max=point[i][j][k];
	328	printf(".");
	329	//printf("Max Omega %f, Max Theta %f, Max Phi %f\n",maxk,maxi,maxj);
	330	}
	331	printf("\n");
c1076715	332
eb1ee126	333	maxk=maxk*(kMaxOmega-kMinOmega)/kDimensionOmega + kMinOmega;
	334
	335
3a3df9e3	336	//printf("Detected angle for height %3.1f and for center %3.1f %3.1f:%f\n",h,cx,cy,maxkkPi/(kDimensionTheta4));
eb1ee126	337	printf(" Indentified cerenkov angle: %f\n", maxk);
3a3df9e3	338	//printf("Detected angle for height %3.1f and for center %3.1f %3.1f:%f\n",kHeight,cx,cy,maxk);
c1076715	339
	340
	341	//fscanf(omegas,"%f",&realomega);
	342	//fscanf(thetas,"%f",&realtheta);
	343	//printf("Real Omega: %f",realomega);
3a3df9e3	344	//cout<<"Detected:theta="<<maxi90/kDimensionTheta<<"phi="<<maxj90/kDimensionPhi<<"omega="<<maxkkMaxOmega/kDimensionOmega180/kPi<<" OmegaError="<<fabs(maxkkMaxOmega/kDimensionOmega180/kPi-realomega)<<" ThetaError="<<fabs(maxi*90/kDimensionTheta-realtheta)<<endl<<endl;
c1076715	345
3a3df9e3	346	//fprintf(results,"Center Coordinates, cx=%6.2f cy=%6.2f, Real Omega=%6.2f, Detected Omega=%6.2f, Omega Error=%6.2f Theta Error=%6.2f\n",cx,cy,realomega,maxkkMaxOmega/kDimensionOmega180/kPi,fabs(maxkkMaxOmega/kDimensionOmega180/kPi-realomega),fabs(maxi*90/kDimensionTheta-realtheta));
c1076715	347
c1076715	348	/*for(j=0;j<np;j++)
3a3df9e3	349	pointpp(maxj90/kDimensionTheta,maxi90/kDimensionPhi,maxkkMaxOmega/kDimensionOmega180/kPi,cx,cy);//Generates a point on the elipse*/
c1076715	350
	351
	352	//Start filling rec. hits
	353
a366fdbe	354	Float_t rechit[6];
c1076715	355
3a3df9e3	356	rechit[0] = (Float_t)( maxikPi/(kDimensionTheta4));
3a3df9e3	357	rechit[1] = (Float_t)( maxjkPi/(kDimensionPhi4));
eb1ee126	358	rechit[2] = (Float_t)( maxk);
c1076715	359	//rechit[0] = (Float_t)( maxi);
	360	//rechit[1] = (Float_t)( maxj);
	361	//rechit[2] = (Float_t)( maxk);
	362	rechit[3] = cx;
	363	rechit[4] = cy;
a366fdbe	364	rechit[5] = 0.5;
c1076715	365
	366	//printf ("track %d, theta %f, phi %f, omega %f\n\n\n",track,rechit[0],rechit[1],rechit[2]);
	367
	368	// fill rechits
4a5c8776	369	pRICH->AddRecHit3D(nch-1,rechit);
ceccff49	370	//printf("Chamber:%d",nch);
c1076715	371	}
	372	//printf("\n\n\n\n");
	373	gAlice->TreeR()->Fill();
	374	//TTree *TR=gAlice->TreeR();
	375	//Stat_t ndig=TR->GetEntries();
	376	TClonesArray *fRec;
237c933d	377	for (i=0;i<kNCH;i++) {
4a5c8776	378	fRec=pRICH->RecHitsAddress3D(i);
c1076715	379	int ndig=fRec->GetEntriesFast();
	380	printf ("Chamber %d, rings %d\n",i,ndig);
	381	}
	382	//printf("Number of rec. hits: %d",ndig);
4a5c8776	383	pRICH->ResetRecHits3D();
c1076715	384	//char hname[30];
	385	//sprintf(hname,"TreeR%d",track);
	386	//gAlice->TreeR()->Write(hname);
	387
	388	}
	389
3a3df9e3	390	Float_t AliRICHDetect:: Area(Float_t theta,Float_t omega)
c1076715	391	{
237c933d	392
	393	//
	394	// Calculates area of an ellipse for given incidence angles
	395
	396
c1076715	397	Float_t area;
3a3df9e3	398	const Float_t kHeight=9.25; //Distance from Radiator to Pads in pads
c1076715	399
00df6e79	400	area=TMath::Pi()TMath::Power(kHeighttan(omega),2)/TMath::Power(TMath::Power(cos(theta),2)-TMath::Power(tan(omega)*sin(theta),2),3/2);
c1076715	401
	402	return (area);
	403	}
	404
	405	/Int_t **AliRICHDetect::i3tensor(long nrl, long nrh, long ncl, long nch, long ndl, long ndh)
	406	// allocate a Float_t 3tensor with range t[nrl..nrh][ncl..nch][ndl..ndh]
	407	{
	408	long i,j,nrow=nrh-nrl+1,ncol=nch-ncl+1,ndep=ndh-ndl+1;
	409	Int_t ***t;
	410
	411	// allocate pointers to pointers to rows
	412	t=(Int_t **) malloc((size_t)((nrow+NR_END)sizeof(Int_t**)));
	413	if (!t) printf("allocation failure 1 in f3tensor()");
	414	t += NR_END;
	415	t -= nrl;
	416
	417	// allocate pointers to rows and set pointers to them
	418	t[nrl]=(Int_t *) malloc((size_t)((nrowncol+NR_END)sizeof(Int_t)));
	419	if (!t[nrl]) printf("allocation failure 2 in f3tensor()");
	420	t[nrl] += NR_END;
	421	t[nrl] -= ncl;
	422
	423	// allocate rows and set pointers to them
	424	t[nrl][ncl]=(Int_t ) malloc((size_t)((nrowncolndep+NR_END)sizeof(Int_t)));
	425	if (!t[nrl][ncl]) printf("allocation failure 3 in f3tensor()");
	426	t[nrl][ncl] += NR_END;
	427	t[nrl][ncl] -= ndl;
	428
	429	for(j=ncl+1;j<=nch;j++) t[nrl][j]=t[nrl][j-1]+ndep;
	430	for(i=nrl+1;i<=nrh;i++) {
	431	t[i]=t[i-1]+ncol;
	432	t[i][ncl]=t[i-1][ncl]+ncol*ndep;
	433	for(j=ncl+1;j<=nch;j++) t[i][j]=t[i][j-1]+ndep;
	434	}
	435
	436	// return pointer to array of pointers to rows
	437	return t;
	438	}*/
	439
3a3df9e3	440	/*void pointpp(Float_t alfa,Float_t theta,Float_t omega,Float_t cx,Float_t cy)
c1076715	441	{
c1076715	442	Int_t s;
3a3df9e3	443	Float_t fiducial=htan((omega+theta)kPi/180),l=h/cos(theta*kPi/180),xtrial,y,c0,c1,c2;
c1076715	444
	445	//cout<<"fiducial="<<fiducial<<endl;
	446
	447	c0=0;c1=0;c2=0;
	448	while((c1c1-4c2*c0)<=0)
	449	{
	450	//Choose which side to go...
	451	if(aleat(1)>.5) s=1; else s=-1;
	452	//Trial a y
	453	y=s*aleat(fiducial);
3a3df9e3	454	Float_t alfa1=alfa*kPi/180;
	455	Float_t theta1=theta*kPi/180;
	456	Float_t omega1=omega*kPi/180;
c1076715	457	//Solve the eq for a trial x
00df6e79	458	c0=-TMath::Power(ycos(alfa1)cos(theta1),2)-TMath::Power(ysin(alfa1),2)+TMath::Power(ltan(omega1),2)+2lycos(alfa1)sin(theta1)TMath::Power(tan(omega1),2)+TMath::Power(ycos(alfa1)sin(theta1)tan(omega1),2);
	459	c1=2ycos(alfa1)sin(alfa1)-2ycos(alfa1)TMath::Power(cos(theta1),2)sin(alfa1)+2lsin(alfa1)sin(theta1)TMath::Power(tan(omega1),2)+2ycos(alfa1)sin(alfa1)TMath::Power(sin(theta1),2)TMath::Power(tan(omega1),2);
	460	c2=-TMath::Power(cos(alfa1),2)-TMath::Power(cos(theta1)sin(alfa1),2)+TMath::Power(sin(alfa1)sin(theta1)*tan(omega1),2);
c1076715	461	//cout<<"Trial: y="<<y<<"c0="<<c0<<" c1="<<c1<<" c2="<<c2<<endl;
	462	}
	463	//Choose which side to go...
	464	if(aleat(1)>.5) s=1; else s=-1;
	465	xtrial=cx+(-c1+ssqrt(c1c1-4c2c0))/(2*c2);
	466	//cout<<"x="<<xtrial<<" y="<<cy+y<<endl;
	467	fprintf(final,"%f %f\n",xtrial,cy+y);
	468	}*/
	469
	470
	471
	472
	473
	474