1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 Revision 1.8 2000/11/15 15:52:53 jbarbosa
19 Turned on spot algorithm.
21 Revision 1.7 2000/11/01 15:37:05 jbarbosa
22 Updated to use its own rec. point object.
24 Revision 1.6 2000/10/02 21:28:12 fca
25 Removal of useless dependecies via forward declarations
27 Revision 1.5 2000/06/30 16:30:28 dibari
28 Disabled writing to rechits.
30 Revision 1.4 2000/06/15 15:46:59 jbarbosa
31 Corrected compilation errors on HP-UX (replaced pow with TMath::Power)
33 Revision 1.3 2000/06/13 13:15:41 jbarbosa
34 Still some code cleanup done (variable names)
36 Revision 1.2 2000/06/12 15:19:30 jbarbosa
39 Revision 1.1 2000/04/19 13:05:14 morsch
40 J. Barbosa's spot reconstruction algorithm.
46 #include "AliRICHPoints.h"
47 #include "AliRICHDetect.h"
48 #include "AliRICHHit.h"
49 #include "AliRICHDigit.h"
51 #include "TParticle.h"
58 ClassImp(AliRICHDetect)
59 //___________________________________________
60 AliRICHDetect::AliRICHDetect() : TObject()
63 // Default constructor
68 //___________________________________________
69 AliRICHDetect::AliRICHDetect(const char *name, const char *title)
75 /*fChambers = new TObjArray(7);
76 for (Int_t i=0; i<7; i++) {
78 (*fChambers)[i] = new AliRICHchamber();
84 void AliRICHDetect::Detect()
88 // Detection algorithm
91 //printf("Detection started!\n");
92 Float_t omega,steptheta,stepphi,x,y,cx,cy,l,aux1,aux2,aux3,maxi,maxj,maxk,max;
93 //Float_t theta,phi,realomega,realtheta;
97 //const Float_t Noise_Level=0; //Noise Level in percentage of mesh points
98 //const Float_t t=0.6; //Softening of Noise Correction (factor)
100 const Float_t kPi=3.1415927;
102 const Float_t kHeight=10; //Distance from Radiator to Pads in pads
104 const Int_t kSpot=0; //number of passes with spot algorithm
106 const Int_t kDimensionTheta=50; //Matrix dimension for angle Detection
107 const Int_t kDimensionPhi=50;
108 const Int_t kDimensionOmega=50;
110 const Float_t SPOTp=.2; //Percentage of spot action
111 //const Int_t np=500; //Number of points to reconstruct elipse
112 const Float_t kMinOmega=30*kPi/180;
113 const Float_t kMaxOmega=65*kPi/180; //Maximum Cherenkov angle to identify
115 const Float_t kCorr=.5; //Correction factor, accounting for aberration, refractive index, etc.
117 Int_t point[kDimensionTheta][kDimensionPhi][kDimensionOmega];
118 Int_t point1[kDimensionTheta][kDimensionPhi][kDimensionOmega];
120 steptheta=kPi/kDimensionTheta;
121 stepphi=kPi/kDimensionPhi;
123 AliRICHChamber* iChamber;
125 AliRICH *pRICH = (AliRICH*)gAlice->GetDetector("RICH");
126 Int_t ntracks = (Int_t)gAlice->TreeH()->GetEntries();
127 //Int_t ntrks = gAlice->GetNtrack();
129 Float_t trackglob[3];
132 //printf("Got ntracks:%d\n",ntracks);
133 /*TVector *xp = new TVector(1000);
134 TVector *yp = new TVector(1000);
135 TVector *zp = new TVector(1000);
136 TVector *ptrk = new TVector(1000);
137 TVector *phit = new TVector(1000);*/
139 //printf("Area de uma elipse com teta 0 e Omega 45:%f",Area(0,45));
143 for (track=0; track<ntracks;track++) {
145 gAlice->TreeH()->GetEvent(track);
146 TClonesArray *pHits = pRICH->Hits();
147 if (pHits == 0) return;
148 Int_t nhits = pHits->GetEntriesFast();
149 if (nhits == 0) continue;
150 Int_t nent=(Int_t)gAlice->TreeD()->GetEntries();
151 gAlice->TreeD()->GetEvent(nent-1);
152 AliRICHHit *mHit = 0;
153 AliRICHDigit *points = 0;
158 for(i=0;i<kDimensionTheta;i++)
160 for(j=0;j<kDimensionPhi;j++)
162 for(k=0;k<kDimensionOmega;k++)
166 //printf("Dimensions theta:%d, phi:%d, omega:%d",kDimensionTheta,kDimensionPhi,kDimensionOmega);
167 //printf("Resetting %d %d %d, time %d\n",i,j,k,counter);
168 //-Noise_Level*(Area(i*kPi/(18*dimension),k*kMaxOmega/dimension)-Area((i-1)*kPi/(18*dimension),(k-1)*kMaxOmega/dimension));
169 //printf("n-%f",-Noise_Level*(Area(i*kPi/(18*dimension),k*kMaxOmega/dimension)-Area((i-1)*kPi/(18*dimension),(k-1)*kMaxOmega/dimension)));
173 mHit = (AliRICHHit*) pHits->UncheckedAt(0);
174 //printf("Aqui vou eu\n");
175 Int_t nch = mHit->fChamber;
176 //printf("Aqui fui eu\n");
177 trackglob[0] = mHit->X();
178 trackglob[1] = mHit->Y();
179 trackglob[2] = mHit->Z();
185 //printf("Chamber processed:%d\n",nch);
187 printf("\nChamber %d, particle at: %3.1f %3.1f,\n",nch,trackglob[0],trackglob[2]);
189 iChamber = &(pRICH->Chamber(nch-1));
191 //printf("Nch:%d\n",nch);
193 iChamber->GlobaltoLocal(trackglob,trackloc);
195 //printf("Transformation 1: %3.1f %3.1f %3.1f\n",trackloc[0],trackloc[1],trackloc[2]);
198 iChamber->LocaltoGlobal(trackloc,trackglob);
200 //printf("Transformation 2: %3.1f %3.1f %3.1f\n",trackglob[0],trackglob[1],trackglob[2]);
205 TClonesArray *pDigits = pRICH->DigitsAddress(nch-1);
206 Int_t ndigits = pDigits->GetEntriesFast();
208 //printf("Got %d digits\n",ndigits);
210 //printf("Starting calculations\n");
212 for(Float_t theta=0;theta<kPi/18;theta+=steptheta)
214 for(Float_t phi=0;phi<=kPi/3;phi+=stepphi)
216 for (Int_t dig=0;dig<ndigits;dig++)
218 points=(AliRICHDigit*) pDigits->UncheckedAt(dig);
222 //printf("Loaded digit %d with coordinates x:%f, y%f\n",dig,x,y);
223 //cout<<"x="<<x<<" y="<<y<<endl;
225 if (sqrt(TMath::Power(x,2)+TMath::Power(y,2))<kHeight*tan(theta+kMaxOmega)*3/4)
229 l=kHeight/cos(theta);
231 aux1=-y*sin(phi)+x*cos(phi);
232 aux2=y*cos(phi)+x*sin(phi);
233 aux3=( TMath::Power(aux1,2)+TMath::Power(cos(theta)*aux2 ,2))/TMath::Power(sin(theta)*aux2+l,2);
234 //cout<<"aux1="<<aux1<<" aux2="<<aux2<<" aux3="<<aux3;
236 omega=atan(sqrt(aux3));
237 //printf("Omega: %f\n",omega);
239 //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;
240 //{Int_t lixo;cin>>lixo;}
241 if(omega<kMaxOmega && omega>kMinOmega)
243 omega=omega-kMinOmega;
244 //point[Int_t(2*theta*kDimensionTheta/kPi)][Int_t(2*phi*kDimensionPhi/kPi)][Int_t(kCorr*2*omega*kDimensionOmega/kMaxOmega)]+=1;
245 point[Int_t(2*theta*kDimensionTheta/kPi)][Int_t(2*phi*kDimensionPhi/kPi)][Int_t(kCorr*(omega/(kMaxOmega-kMinOmega)*kDimensionOmega))]+=1;
247 //if(omega<kMaxOmega)point[Int_t(theta)][Int_t(phi)][Int_t(omega)]+=1;
255 for(Int_t s=0;s<kSpot;s++)
257 printf(" Applying Spot algorithm, pass %d\n", s);
260 for(i=0;i<=kDimensionTheta;i++)
262 for(j=0;j<=kDimensionPhi;j++)
264 for(k=0;k<=kDimensionOmega;k++)
266 point1[i][j][k]=point[i][j][k];
272 for(i=1;i<kDimensionTheta;i++)
274 for(j=1;j<kDimensionPhi;j++)
276 for(k=1;k<kDimensionOmega;k++)
278 if((point[i][k][j]>point[i-1][k][j])&&(point[i][k][j]>point[i+1][k][j])&&
279 (point[i][k][j]>point[i][k-1][j])&&(point[i][k][j]>point[i][k+1][j])&&
280 (point[i][k][j]>point[i][k][j-1])&&(point[i][k][j]>point[i][k][j+1]))
282 //cout<<"SPOT"<<endl;
283 //Execute SPOT on point
284 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]));
285 point1[i-1][k][j]=Int_t(SPOTp*point[i-1][k][j]);
286 point1[i+1][k][j]=Int_t(SPOTp*point[i+1][k][j]);
287 point1[i][k-1][j]=Int_t(SPOTp*point[i][k-1][j]);
288 point1[i][k+1][j]=Int_t(SPOTp*point[i][k+1][j]);
289 point1[i][k][j-1]=Int_t(SPOTp*point[i][k][j-1]);
290 point1[i][k][j+1]=Int_t(SPOTp*point[i][k][j+1]);
296 //copy from buffer copy
297 for(i=1;i<kDimensionTheta;i++)
299 for(j=1;j<kDimensionPhi;j++)
301 for(k=1;k<kDimensionOmega;k++)
303 point[i][j][k]=point1[i][j][k];
304 //if(point1[i][j][k] != 0)
305 //printf("Last transfer point: %d, point1, %d\n",point[i][j][k],point1[i][j][k]);
312 //Identification is equivalent to maximum determination
313 max=0;maxi=0;maxj=0;maxk=0;
315 printf(" Proceeding to identification");
317 for(i=1;i<kDimensionTheta-3;i++)
318 for(j=1;j<=kDimensionPhi-3;j++)
319 for(k=0;k<=kDimensionOmega;k++)
320 if(point[i][j][k]>max)
322 //cout<<"maxi="<<i*90/dimension<<" maxj="<<j*90/dimension<<" maxk="<<k*kMaxOmega/dimension*180/kPi<<" max="<<max<<endl;
323 maxi=i;maxj=j;maxk=k;
326 //printf("Max Omega %f, Max Theta %f, Max Phi %f\n",maxk,maxi,maxj);
330 maxk=maxk*(kMaxOmega-kMinOmega)/kDimensionOmega + kMinOmega;
333 //printf("Detected angle for height %3.1f and for center %3.1f %3.1f:%f\n",h,cx,cy,maxk*kPi/(kDimensionTheta*4));
334 printf(" Indentified cerenkov angle: %f\n", maxk);
335 //printf("Detected angle for height %3.1f and for center %3.1f %3.1f:%f\n",kHeight,cx,cy,maxk);
338 //fscanf(omegas,"%f",&realomega);
339 //fscanf(thetas,"%f",&realtheta);
340 //printf("Real Omega: %f",realomega);
341 //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;
343 //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));
346 pointpp(maxj*90/kDimensionTheta,maxi*90/kDimensionPhi,maxk*kMaxOmega/kDimensionOmega*180/kPi,cx,cy);//Generates a point on the elipse*/
349 //Start filling rec. hits
353 rechit[0] = (Float_t)( maxi*kPi/(kDimensionTheta*4));
354 rechit[1] = (Float_t)( maxj*kPi/(kDimensionPhi*4));
355 rechit[2] = (Float_t)( maxk);
356 //rechit[0] = (Float_t)( maxi);
357 //rechit[1] = (Float_t)( maxj);
358 //rechit[2] = (Float_t)( maxk);
363 //printf ("track %d, theta %f, phi %f, omega %f\n\n\n",track,rechit[0],rechit[1],rechit[2]);
366 pRICH->AddRecHit3D(nch-1,rechit);
367 //printf("Chamber:%d",nch);
369 //printf("\n\n\n\n");
370 gAlice->TreeR()->Fill();
371 //TTree *TR=gAlice->TreeR();
372 //Stat_t ndig=TR->GetEntries();
374 for (i=0;i<kNCH;i++) {
375 fRec=pRICH->RecHitsAddress3D(i);
376 int ndig=fRec->GetEntriesFast();
377 printf ("Chamber %d, rings %d\n",i,ndig);
379 //printf("Number of rec. hits: %d",ndig);
380 pRICH->ResetRecHits3D();
382 //sprintf(hname,"TreeR%d",track);
383 //gAlice->TreeR()->Write(hname);
387 Float_t AliRICHDetect:: Area(Float_t theta,Float_t omega)
391 // Calculates area of an ellipse for given incidence angles
395 const Float_t kHeight=9.25; //Distance from Radiator to Pads in pads
397 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);
402 /*Int_t ***AliRICHDetect::i3tensor(long nrl, long nrh, long ncl, long nch, long ndl, long ndh)
403 // allocate a Float_t 3tensor with range t[nrl..nrh][ncl..nch][ndl..ndh]
405 long i,j,nrow=nrh-nrl+1,ncol=nch-ncl+1,ndep=ndh-ndl+1;
408 // allocate pointers to pointers to rows
409 t=(Int_t ***) malloc((size_t)((nrow+NR_END)*sizeof(Int_t**)));
410 if (!t) printf("allocation failure 1 in f3tensor()");
414 // allocate pointers to rows and set pointers to them
415 t[nrl]=(Int_t **) malloc((size_t)((nrow*ncol+NR_END)*sizeof(Int_t*)));
416 if (!t[nrl]) printf("allocation failure 2 in f3tensor()");
420 // allocate rows and set pointers to them
421 t[nrl][ncl]=(Int_t *) malloc((size_t)((nrow*ncol*ndep+NR_END)*sizeof(Int_t)));
422 if (!t[nrl][ncl]) printf("allocation failure 3 in f3tensor()");
423 t[nrl][ncl] += NR_END;
426 for(j=ncl+1;j<=nch;j++) t[nrl][j]=t[nrl][j-1]+ndep;
427 for(i=nrl+1;i<=nrh;i++) {
429 t[i][ncl]=t[i-1][ncl]+ncol*ndep;
430 for(j=ncl+1;j<=nch;j++) t[i][j]=t[i][j-1]+ndep;
433 // return pointer to array of pointers to rows
437 /*void pointpp(Float_t alfa,Float_t theta,Float_t omega,Float_t cx,Float_t cy)
440 Float_t fiducial=h*tan((omega+theta)*kPi/180),l=h/cos(theta*kPi/180),xtrial,y,c0,c1,c2;
442 //cout<<"fiducial="<<fiducial<<endl;
445 while((c1*c1-4*c2*c0)<=0)
447 //Choose which side to go...
448 if(aleat(1)>.5) s=1; else s=-1;
451 Float_t alfa1=alfa*kPi/180;
452 Float_t theta1=theta*kPi/180;
453 Float_t omega1=omega*kPi/180;
454 //Solve the eq for a trial x
455 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);
456 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);
457 c2=-TMath::Power(cos(alfa1),2)-TMath::Power(cos(theta1)*sin(alfa1),2)+TMath::Power(sin(alfa1)*sin(theta1)*tan(omega1),2);
458 //cout<<"Trial: y="<<y<<"c0="<<c0<<" c1="<<c1<<" c2="<<c2<<endl;
460 //Choose which side to go...
461 if(aleat(1)>.5) s=1; else s=-1;
462 xtrial=cx+(-c1+s*sqrt(c1*c1-4*c2*c0))/(2*c2);
463 //cout<<"x="<<xtrial<<" y="<<cy+y<<endl;
464 fprintf(final,"%f %f\n",xtrial,cy+y);