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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$Log$
18*/
19
8c555625 20///////////////////////////////////////////////////////////////////////////////
21// AliTPCPRF2D - //
22// Pad response function object in two dimesions //
23// This class contains the basic functions for the //
24// calculation of PRF according generic charge distribution //
25// In Update function object calculate table of response function //
26// in discrete x and y position //
27// This table is used for interpolation od response function in any position //
28// (function GetPRF) //
29// //
30// Origin: Marian Ivanov, Uni. of Bratislava, ivanov@fmph.uniba.sk //
31// //
32///////////////////////////////////////////////////////////////////////////////
33#include "TMath.h"
34#include "AliTPCPRF2D.h"
35#include "TF2.h"
36#include <iostream.h>
37#include <string.h>
38#include "TCanvas.h"
39#include "TPad.h"
40#include "TStyle.h"
41#include "TH1.h"
42#include "TH2.h"
43#include "TPaveText.h"
44#include "TText.h"
45
46extern TStyle * gStyle;
47
48static const Float_t sqrt12=3.46;
49static const Int_t NPRF = 100;
50
51
52static Double_t funGauss2D(Double_t *x, Double_t * par)
53{
54 return ( TMath::Exp(-(x[0]*x[0])/(2*par[0]*par[0]))*
55 TMath::Exp(-(x[1]*x[1])/(2*par[1]*par[1])));
56
57}
58
59static Double_t funCosh2D(Double_t *x, Double_t * par)
60{
61 return ( 1/(TMath::CosH(3.14159*x[0]/(2*par[0]))*
62 TMath::CosH(3.14159*x[1]/(2*par[1]))));
63}
64
65static Double_t funGati2D(Double_t *x, Double_t * par)
66{
67 //par[1] = is equal to k3X
68 //par[0] is equal to pad wire distance
69 Float_t K3=par[1];
70 Float_t K3R=TMath::Sqrt(K3);
71 Float_t K2=(TMath::Pi()/2)*(1-K3R/2.);
72 Float_t K1=K2*K3R/(4*TMath::ATan(K3R));
73 Float_t l=x[0]/par[0];
74 Float_t tan2=TMath::TanH(K2*l);
75 tan2*=tan2;
76 Float_t res = K1*(1-tan2)/(1+K3*tan2);
77 //par[4] = is equal to k3Y
78 K3=par[4];
79 K3R=TMath::Sqrt(K3);
80 K2=(TMath::Pi()/2)*(1-K3R/2.);
81 K1=K2*K3R/(4*TMath::ATan(K3R));
82 l=x[1]/par[0];
83 tan2=TMath::TanH(K2*l);
84 tan2*=tan2;
85 res = res*K1*(1-tan2)/(1+K3*tan2);
86 return res;
87}
88
89
90///////////////////////////////////////////////////////////////////////////
91///////////////////////////////////////////////////////////////////////////
92///////////////////////////////////////////////////////////////////////////
93///////////////////////////////////////////////////////////////////////////
94
95ClassImp(AliTPCPRF2D)
96
97AliTPCPRF2D::AliTPCPRF2D()
98{
99 ffcharge = 0;
100 fNPRF =NPRF ;
101 fSigmaX = 0;
102
103 fGRF = 0;
104 fkNorm = 1;
105 forigsigmaY=0;
106 forigsigmaX=0;
107 fNdiv = 5;
108 //chewron default values
109 SetPad(0.8,0.8);
110 SetChevron(0.2,0.0,1.0);
111 SetY(-0.2,0.2,2);
112 // SetGauss(0.22,0.22,1);
113}
114
115AliTPCPRF2D::~AliTPCPRF2D()
116{
117 if (ffcharge!=0) delete [] ffcharge;
118 if (fGRF !=0 ) fGRF->Delete();
119}
120
121void AliTPCPRF2D::SetY(Float_t y1, Float_t y2, Int_t nYdiv)
122{
123 //
124 //set virtual line position
125 //first and last line and number of lines
126 fNYdiv = nYdiv;
127 if (ffcharge!=0) delete [] ffcharge;
128 ffcharge = new Float_t[fNPRF*fNYdiv];
129 fY1=y1;
130 fY2=y2;
131}
132
133void AliTPCPRF2D::SetPad(Float_t width, Float_t height)
134{
135 //set base chevron parameters
136 fHeightFull=height;
137 fWidth=width;
138}
139void AliTPCPRF2D::SetChevron(Float_t hstep,
140 Float_t shifty,
141 Float_t fac)
142{
143 //set shaping of chewron parameters
144 fHeightS=hstep;
145 fShiftY=shifty;
146 fK=fWidth*fac/hstep;
147}
148
149void AliTPCPRF2D::SetChParam(Float_t width, Float_t height,
150 Float_t hstep, Float_t shifty, Float_t fac)
151{
152 SetPad(width,height);
153 SetChevron(hstep,shifty,fac);
154}
155
156
157Float_t AliTPCPRF2D::GetPRF(Float_t xin, Float_t yin, Bool_t inter)
158{
159 if (ffcharge==0) return 0;
160 // Float_t y=Float_t(fNYdiv-1)*(yin-fY1)/(fY2-fY1);
161 //transform position to "wire position"
162 Float_t y=fDYtoWire*(yin-fY1);
163 if (fNYdiv == 1) y=fY1;
164 //normaly it find nearest line charge
165 if (inter ==kFALSE){
166 Int_t i=Int_t(0.5+y);
167 if (y<0) i=Int_t(-0.5+y);
168 if ((i<0) || (i>=fNYdiv) ) return 0;
169 fcharge = &(ffcharge[i*fNPRF]);
170 return GetPRFActiv(xin);
171 }
172 else{
173 //make interpolation from more fore lines
174 Int_t i= Int_t(y);
175 if ((i<0) || (i>=fNYdiv) ) return 0;
176 Float_t z0=0;
177 Float_t z1=0;
178 Float_t z2=0;
179 Float_t z3=0;
180 if (i>0) {
181 fcharge =&(ffcharge[(i-1)*fNPRF]);
182 z0 = GetPRFActiv(xin);
183 }
184 fcharge =&(ffcharge[i*fNPRF]);
185 z1=GetPRFActiv(xin);
186 if ((i+1)<fNYdiv){
187 fcharge =&(ffcharge[(i+1)*fNPRF]);
188 z2 = GetPRFActiv(xin);
189 }
190 if ((i+2)<fNYdiv){
191 fcharge =&(ffcharge[(i+2)*fNPRF]);
192 z3 = GetPRFActiv(xin);
193 }
194 Float_t a,b,c,d,K,L;
195 a=z1;
196 b=(z2-z0)/2.;
197 K=z2-a-b;
198 L=(z3-z1)/2.-b;
199 d=L-2*K;
200 c=K-d;
201 Float_t dy=y-Float_t(i);
202 Float_t res = a+b*dy+c*dy*dy+d*dy*dy*dy;
203 //Float_t res = z1*(1-dy)+z2*dy;
204 return res;
205 }
206 return 0.;
207}
208
209
210Float_t AliTPCPRF2D::GetPRFActiv(Float_t xin)
211{
212 //x xin DStep unit
213 //return splaine aproximaton
214 Float_t x = (xin*fDStepM1)+fNPRF/2;
215 Int_t i = Int_t(x);
216
217 if ( (i>0) && ((i+2)<fNPRF)) {
218 Float_t a,b,c,d,K,L;
219 a = fcharge[i];
220 b = (fcharge[i+1]-fcharge[i-1])*0.5;
221 K = fcharge[i+1]-a-b;
222 L = (fcharge[i+2]-fcharge[i])*0.5-b;
223 d=L-2.*K;
224 c=K-d;
225 Float_t dx=x-Float_t(i);
226 Float_t res = a+b*dx+c*dx*dx+d*dx*dx*dx;
227 return res;
228 }
229 else return 0;
230}
231
232
233Float_t AliTPCPRF2D::GetGRF(Float_t xin, Float_t yin)
234{
235 if (fGRF != 0 )
236 return fkNorm*fGRF->Eval(xin,yin)/fInteg;
237 else
238 return 0.;
239}
240
241
242void AliTPCPRF2D::SetParam( TF2 * GRF, Float_t kNorm,
243 Float_t sigmaX, Float_t sigmaY)
244{
245 if (fGRF !=0 ) fGRF->Delete();
246 fGRF = GRF;
247 fkNorm = kNorm;
248 if (sigmaX ==0) sigmaX=(fWidth+fK*fHeightS)/sqrt12;
249 if (sigmaY ==0) sigmaY=(fWidth+fK*fHeightS)/sqrt12;
250 forigsigmaX=sigmaX;
251 forigsigmaY=sigmaY;
252 fDStep = TMath::Sqrt(sigmaX*sigmaX+fWidth*fWidth/6.)/10.;
253 // Update();
254 sprintf(fType,"User");
255}
256
257
258void AliTPCPRF2D::SetGauss(Float_t sigmaX, Float_t sigmaY,
259 Float_t kNorm)
260{
261 fkNorm = kNorm;
262 if (fGRF !=0 ) fGRF->Delete();
263 fGRF = new TF2("fun",funGauss2D,-5.,5.,-5.,5.,4);
264 funParam[0]=sigmaX;
265 funParam[1]=sigmaY;
266 funParam[2]=fK;
267 funParam[3]=fHeightS;
268 forigsigmaX=sigmaX;
269 forigsigmaY=sigmaY;
270 fGRF->SetParameters(funParam);
271 fDStep = TMath::Sqrt(sigmaX*sigmaX+fWidth*fWidth/6.)/10.;
272 //by default I set the step as one tenth of sigma
273 //Update();
274 sprintf(fType,"Gauss");
275}
276
277void AliTPCPRF2D::SetCosh(Float_t sigmaX, Float_t sigmaY,
278 Float_t kNorm)
279{
280 fkNorm = kNorm;
281 if (fGRF !=0 ) fGRF->Delete();
282 fGRF = new TF2("fun", funCosh2D,-5.,5.,-5.,5.,4);
283 funParam[0]=sigmaX;
284 funParam[1]=sigmaY;
285 funParam[2]=fK;
286 funParam[3]=fHeightS;
287 fGRF->SetParameters(funParam);
288 forigsigmaX=sigmaX;
289 forigsigmaY=sigmaY;
290 fDStep = TMath::Sqrt(sigmaX*sigmaX+fWidth*fWidth/6.)/10.;
291 //by default I set the step as one tenth of sigma
292 //Update();
293 sprintf(fType,"Cosh");
294}
295
296void AliTPCPRF2D::SetGati(Float_t K3X, Float_t K3Y,
297 Float_t padDistance,
298 Float_t kNorm)
299{
300 fkNorm = kNorm;
301 if (fGRF !=0 ) fGRF->Delete();
302 fGRF = new TF2("fun", funGati2D,-5.,5.,-5.,5.,5);
303 fK3X=K3X;
304 fK3Y=K3Y;
305 fPadDistance=padDistance;
306 funParam[0]=padDistance;
307 funParam[1]=K3X;
308 funParam[2]=fK;
309 funParam[3]=fHeightS;
310 funParam[4]=K3Y;
311 fGRF->SetParameters(funParam);
312 forigsigmaX=padDistance;
313 forigsigmaY=padDistance;
314 fDStep = TMath::Sqrt(padDistance*padDistance+fWidth*fWidth/6.)/10.;
315 //by default I set the step as one tenth of sigma
316 //Update();
317 sprintf(fType,"Gati");
318}
319
320
321
322void AliTPCPRF2D::Update()
323{
324 for (Int_t i=0; i<fNYdiv; i++){
325 if (fNYdiv == 1) fActualY = fY1;
326 else
327 fActualY = fY1+Float_t(i)*(fY2-fY1)/Float_t(fNYdiv-1);
328 fcharge = &(ffcharge[i*fNPRF]);
329 Update1();
330 }
331}
332
333
334
335void AliTPCPRF2D::Update1()
336{
337 //initialize to 0
338
339
340 Int_t i;
341 Float_t x;
342 for (i =0; i<fNPRF;i++) fcharge[i] = 0;
343 if ( fGRF == 0 ) return;
344 ////////////////////////////////////////////////////////
345 //I'm waiting for normal integral
346 //in this moment only sum
347 Float_t x2= 4*forigsigmaX;
348 Float_t y2= 4*forigsigmaY;
349 Float_t dx = forigsigmaX/Float_t(fNdiv*6);
350 Float_t dy = forigsigmaY/Float_t(fNdiv*6);
351 fInteg = 0;
352 for (x=0.;x<x2;x+=dx)
353 for (Float_t y=0;y<y2;y+=dy) fInteg+=fGRF->Eval(x,y)*dx*dy;
354 fInteg*=4;
355 /////////////////////////////////////////////////////
356
357
358 if ( fInteg == 0 ) fInteg = 1;
359
360 //integrate charge over pad for different distance of pad
361 for (i =0; i<fNPRF;i++)
362 { //x in cm fWidth in cm
363 //calculate integral
364 Float_t xch = fDStep * (Float_t)(i-fNPRF/2);
365 Float_t k=1;
366 fcharge[i]=0;
367 for (Float_t y=-fHeightFull/2.-fShiftY;
368 y<fHeightFull/2.;y+=fHeightS){
369 Float_t y2=TMath::Min((y+fHeightS),Float_t(fHeightFull/2.));
370 Float_t y1=TMath::Max((y),Float_t(-fHeightFull/2.));
371 Float_t x1;
372
373 if (k>0)
374 x1 = (y2-y1)*fK-(fWidth+fK*fHeightS)/2.;
375 else
376 x1 =-(fWidth+fK*fHeightS)/2. ;
377 Float_t x2=x1+fWidth;
378
379 if (y2>y1) {
380
381 if ((x2-x1)*fNdiv<forigsigmaX) dx=(x2-x1);
382 else{
383 dx= forigsigmaX/Float_t(fNdiv);
384 dx = (x2-x1)/Float_t(Int_t(3+(x2-x1)/dx));
385 }
386 Float_t dy;
387 if ((y2-y1)*fNdiv<forigsigmaY) dy=(y2-y1);
388 else{
389 dy= forigsigmaY/Float_t(fNdiv);
390 dy = (y2-y1)/Float_t(Int_t(3+(y2-y1)/dy));
391 }
392
393 for (x=x1;x<x2;x+=dx)
394 for (Float_t y=y1;y<y2;y+=dy){
395 if ( (y>(fActualY-(4.0*forigsigmaY))) &&
396 (y<(fActualY+(4.0*forigsigmaY)))){
397 Float_t xt=x-k*fK*(y-y1);
398 if ((TMath::Abs(xch-xt)<4*forigsigmaX)){
399
400 Float_t z0=fGRF->Eval(xch-(xt+dx/2.),fActualY-(y+dy/2.));
401
402 Float_t z1=fGRF->Eval(xch-(xt+dx/2.),fActualY-y);
403 Float_t z2=fGRF->Eval(xch-xt,fActualY-(y+dy/2.));
404 Float_t z3=fGRF->Eval(xch-(xt-dx/2.),fActualY-y);
405 Float_t z4=fGRF->Eval(xch-xt,fActualY-(y-dy/2.));
406 if (z0<0) z0=0;
407 if (z1<0) z1=0;
408 if (z2<0) z2=0;
409 if (z3<0) z3=0;
410 if (z4<0) z4=0;
411
412 // Float_t a=(z1-z3)/2;
413 // Float_t b=(z2-z4)/2;
414 Float_t c= (z3+z1-2*z0)/2.;
415 Float_t d= (z2+z4-2*z0)/2.;
416 Float_t z= (z0+c/12.+d/12.);
417
418 //Float_t z= fGRF->Eval(xch-xt,fActualY-y);
419 if (z>0.) fcharge[i]+=z*dx*dy/fInteg;
420 }
421 }
422 }
423 }
424 k*=-1;
425 }
426 };
427
428 fSigmaX = 0;
429 Float_t sum =0;
430 Float_t mean=0;
431 for (x =-fNPRF*fDStep; x<fNPRF*fDStep;x+=fDStep)
432 { //x in cm fWidth in cm
433 Float_t weight = GetPRFActiv(x);
434 fSigmaX+=x*x*weight;
435 mean+=x*weight;
436 sum+=weight;
437 };
438 if (sum>0){
439 mean/=sum;
440 fSigmaX = TMath::Sqrt(fSigmaX/sum-mean*mean);
441 }
442 else fSigmaX=0;
443 //calculate conversion coefitient to convert position to virtual wire
444 fDYtoWire=Float_t(fNYdiv-1)/(fY2-fY1);
445 fDStepM1=1/fDStep;
446}
447
448void AliTPCPRF2D::Streamer(TBuffer &R__b)
449{
450 // Stream an object of class AliTPCPRF2D
451
452 if (R__b.IsReading()) {
453 Version_t R__v = R__b.ReadVersion(); if (R__v) { }
454 TObject::Streamer(R__b);
455 //read chewron parameters
456 R__b >> fSigmaX;
457 R__b >> fHeightFull;
458 R__b >> fHeightS;
459 R__b >> fShiftY;
460 R__b >> fWidth;
461 R__b >> fK;
462 R__b >> fActualY;
463 //read charge parameters
464 R__b >> fType[0];
465 R__b >> fType[1];
466 R__b >> fType[2];
467 R__b >> fType[3];
468 R__b >> fType[4];
469 R__b >> forigsigmaX;
470 R__b >> forigsigmaY;
471 R__b >> fkNorm;
472 R__b >> fK3X;
473 R__b >> fK3Y;
474 R__b >> fPadDistance;
475 R__b >> fInteg;
476
477 //read functions
478 if (fGRF!=0) {
479 delete [] fGRF;
480 fGRF=0;
481 }
482 if (strncmp(fType,"User",3)==0){
483 fGRF= new TF2;
484 R__b>>fGRF;
485 }
486 if (strncmp(fType,"Gauss",3)==0)
487 fGRF = new TF2("fun",funGauss2D,-5.,5.,-5.,5.,4);
488 if (strncmp(fType,"Cosh",3)==0)
489 fGRF = new TF2("fun",funCosh2D,-5.,5.,-5.,5.,4);
490 if (strncmp(fType,"Gati",3)==0)
491 fGRF = new TF2("fun",funGati2D,-5.,5.,-5.,5.,5);
492
493 //read interpolation parameters
494 R__b >>fY1;
495 R__b >>fY2;
496 R__b >>fNYdiv;
497 R__b >>fDStep;
498 R__b >>fNPRF;
499 if (ffcharge!=0) delete [] ffcharge;
500 ffcharge = new Float_t[fNPRF*fNYdiv];
501 R__b.ReadFastArray(ffcharge,fNPRF*fNYdiv);
502 R__b.ReadFastArray(funParam,5);
503 if (fGRF!=0) fGRF->SetParameters(funParam);
504 //calculate conversion coefitient to convert position to virtual wire
505 fDYtoWire=Float_t(fNYdiv-1)/(fY2-fY1);
506 fDStepM1=1/fDStep;
507 } else {
508 R__b.WriteVersion(AliTPCPRF2D::IsA());
509 TObject::Streamer(R__b);
510 //write chewron parameters
511 R__b << fSigmaX;
512 R__b << fHeightFull;
513 R__b << fHeightS;
514 R__b << fShiftY;
515 R__b << fWidth;
516 R__b << fK;
517 R__b << fActualY;
518 //write charge parameters
519 R__b << fType[0];
520 R__b << fType[1];
521 R__b << fType[2];
522 R__b << fType[3];
523 R__b << fType[4];
524
525 R__b << forigsigmaX;
526 R__b << forigsigmaY;
527 R__b << fkNorm;
528 R__b << fK3X;
529 R__b << fK3Y;
530 R__b << fPadDistance;
531 R__b << fInteg;
532
533 if (strncmp(fType,"User",3)==0) R__b <<fGRF;
534 //write interpolation parameters
535 R__b <<fY1;
536 R__b <<fY2;
537 R__b <<fNYdiv;
538 R__b <<fDStep;
539 R__b <<fNPRF;
540 R__b.WriteFastArray(ffcharge,fNPRF*fNYdiv);
541 R__b.WriteFastArray(funParam,5);
542 }
543}
544
545
546
547
548void AliTPCPRF2D::DrawX(Float_t x1 ,Float_t x2,Float_t y, Bool_t inter)
549{
550 if (fGRF==0) return ;
551 const Int_t N=100;
552 char s[100];
553 TCanvas * c1 = new TCanvas("canPRF","Pad response function",700,900);
554 c1->cd();
555 TPad * pad1 = new TPad("pad1PRF","",0.05,0.61,0.95,0.97,21);
556 pad1->Draw();
557 TPad * pad2 = new TPad("pad2PRF","",0.05,0.22,0.95,0.60,21);
558 pad2->Draw();
559
560 // pad1->cd();
561 //pad2->cd();
562 gStyle->SetOptFit(1);
563 gStyle->SetOptStat(0);
564 sprintf(s,"PRF response function for chevron pad");
565 TH1F * hPRFc = new TH1F("hPRFc",s,N+1,x1,x2);
566 Float_t x=x1;
567 Float_t y1;
568 // Float_t y2;
569
570 for (Float_t i = 0;i<N+1;i++)
571 {
572 x+=(x2-x1)/Float_t(N);
573 y1 = GetPRF(x,y,inter);
574 hPRFc->Fill(x,y1);
575 };
576
577 pad1->cd();
578 fGRF->SetRange(x1,x1,x2,x2);
579 fGRF->SetNpx(25);
580 fGRF->SetNpy(25);
581 fGRF->Draw("lego2");
582 // hPRFo->Fit("gaus");
583 gStyle->SetOptStat(1);
584 pad2->cd();
585 hPRFc->Fit("gaus");
586 c1->cd();
587 TPaveText * comment = new TPaveText(0.05,0.02,0.95,0.20,"NDC");
588 comment->SetTextAlign(12);
589 comment->SetFillColor(42);
590 TText *title = comment->AddText("Chevron pad parameters:");
591 title->SetTextSize(0.03);
592 sprintf(s,"Full height of pad: %2.2f",fHeightFull);
593 comment->AddText(s);
594 sprintf(s,"Height of one chevron unit h: %2.2f cm",2*fHeightS);
595 comment->AddText(s);
596 sprintf(s,"Width of one chevron unit w: %2.2f cm",fWidth);
597 comment->AddText(s);
598 sprintf(s,"Overlap factor: %2.2f",fK*fHeightS/fWidth);
599 comment->AddText(s);
600 sprintf(s,"Y position: %2.2f ",y);
601 comment->AddText(s);
602 sprintf(s,"Sigma x of original distribution: %2.2f ",forigsigmaX);
603 comment->AddText(s);
604 sprintf(s,"Sigma y of original distribution: %2.2f ",forigsigmaY);
605 comment->AddText(s);
606 sprintf(s,"Type of original distribution: %s ",fType);
607 comment->AddText(s);
608 comment->Draw();
609}
610
611
612
613void AliTPCPRF2D::Draw(Float_t x1 ,Float_t x2,Float_t y1, Float_t y2,
614 Bool_t inter, Int_t Nx, Int_t Ny)
615{
616 char s[100];
617 if (fGRF==0) return ;
618 TCanvas * c1 = new TCanvas("canPRF","Pad response function",700,900);
619 c1->cd();
620 TPad * pad1 = new TPad("pad1PRF","",0.05,0.61,0.95,0.97,21);
621 pad1->Draw();
622 TPad * pad2 = new TPad("pad2PRF","",0.05,0.22,0.95,0.60,21);
623 pad2->Draw();
624
625 // pad1->cd();
626 //pad2->cd();
627 gStyle->SetOptFit(1);
628 gStyle->SetOptStat(0);
629 sprintf(s,"PRF response function for chevron pad");
630 TH2F * hPRFc = new TH2F("hPRFc",s,Nx+1,x1,x2,Ny+1,y1,y2);
631 Float_t dx=(x2-x1)/Float_t(Nx);
632 Float_t dy=(y2-y1)/Float_t(Ny) ;
633 Float_t x,y,z;
634 // Float_t y2;
635 for ( x = x1;x<=x2;x+=dx){
636 for(y = y1;y<=y2;y+=dy)
637 {
638 z = GetPRF(x,y,inter);
639 hPRFc->Fill(x,y,z);
640 };
641 }
642 pad1->cd();
643 fGRF->SetRange(x1,y1,x2,y2);
644 fGRF->SetNpx(25);
645 fGRF->SetNpy(25);
646 fGRF->Draw("lego2");
647 // hPRFo->Fit("gaus");
648 gStyle->SetOptStat(1);
649 pad2->cd();
650 hPRFc->Draw("lego2");
651 c1->cd();
652 TPaveText * comment = new TPaveText(0.05,0.02,0.95,0.20,"NDC");
653 comment->SetTextAlign(12);
654 comment->SetFillColor(42);
655 TText *title = comment->AddText("Chevron pad parameters:");
656 title->SetTextSize(0.03);
657 sprintf(s,"Full height of pad: %2.2f",fHeightFull);
658 comment->AddText(s);
659 sprintf(s,"Height of one chevron unit h: %2.2f cm",2*fHeightS);
660 comment->AddText(s);
661 sprintf(s,"Width of one chevron unit w: %2.2f cm",fWidth);
662 comment->AddText(s);
663 sprintf(s,"Overlap factor: %2.2f",fK*fHeightS/fWidth);
664 comment->AddText(s);
665 sprintf(s,"Sigma x of original distribution: %2.2f ",forigsigmaX);
666 comment->AddText(s);
667 sprintf(s,"Sigma y of original distribution: %2.2f ",forigsigmaY);
668 comment->AddText(s);
669 sprintf(s,"Type of original distribution: %s ",fType);
670 comment->AddText(s);
671 comment->Draw();
672}
673
674void AliTPCPRF2D::DrawDist(Float_t x1 ,Float_t x2,Float_t y1, Float_t y2,
675 Bool_t inter, Int_t Nx, Int_t Ny, Float_t thr)
676{
677 const Float_t minth=0.00001;
678 if (thr<minth) thr=minth;
679 char s[100];
680 if (fGRF==0) return ;
681 TCanvas * c1 = new TCanvas("padDistortion","COG distortion",700,900);
682 c1->cd();
683 TPad * pad1 = new TPad("CHARGE","",0.05,0.61,0.95,0.97,21);
684 pad1->Draw();
685 TPad * pad2 = new TPad("dist","",0.05,0.22,0.95,0.60,21);
686 pad2->Draw();
687
688 // pad1->cd();
689 //pad2->cd();
690 gStyle->SetOptFit(1);
691 gStyle->SetOptStat(0);
692 sprintf(s,"COG distortion (threshold=%2.2f)",thr);
693 TH2F * hPRFDist = new TH2F("hDistortion",s,Nx+1,x1,x2,Ny+1,y1,y2);
694 Float_t dx=(x2-x1)/Float_t(Nx);
695 Float_t dy=(y2-y1)/Float_t(Ny) ;
696 Float_t x,y,z,ddx;
697 // Float_t y2;
698 for ( x = x1;x<(x2+dx/2.);x+=dx)
699 for(y = y1;y<=(y2+dx/2.);y+=dy)
700 {
701 Float_t sumx=0;
702 Float_t sum=0;
703 for (Float_t padx=-fWidth;padx<(fWidth*1.1);padx+=fWidth)
704 {
705 z = GetPRF(x-padx,y,inter);
706 if (z>thr){
707 sum+=z;
708 sumx+=z*padx;
709 }
710 };
711 if (sum>minth)
712 {
713 ddx = (x-(sumx/sum));
714 }
715 else ddx=-1;
716 if (TMath::Abs(ddx)<10) hPRFDist->Fill(x,y,ddx);
717 }
718 pad1->cd();
719 fGRF->SetRange(x1,y1,x2,y2);
720 fGRF->SetNpx(25);
721 fGRF->SetNpy(25);
722 fGRF->Draw("lego2");
723 // hPRFo->Fit("gaus");
724 // gStyle->SetOptStat(1);
725 pad2->cd();
726 hPRFDist->Draw("lego2");
727
728 c1->cd();
729 TPaveText * comment = new TPaveText(0.05,0.02,0.95,0.20,"NDC");
730 comment->SetTextAlign(12);
731 comment->SetFillColor(42);
732 // TText *title = comment->AddText("Distortion of COG method");
733 // title->SetTextSize(0.03);
734 TText * title = comment->AddText("Chevron pad parameters:");
735 title->SetTextSize(0.03);
736 sprintf(s,"Full height of pad: %2.2f",fHeightFull);
737 comment->AddText(s);
738 sprintf(s,"Height of one chevron unit h: %2.2f cm",2*fHeightS);
739 comment->AddText(s);
740 sprintf(s,"Width of one chevron unit w: %2.2f cm",fWidth);
741 comment->AddText(s);
742 sprintf(s,"Overlap factor: %2.2f",fK*fHeightS/fWidth);
743 comment->AddText(s);
744 sprintf(s,"Sigma x of original distribution: %2.2f ",forigsigmaX);
745 comment->AddText(s);
746 sprintf(s,"Sigma y of original distribution: %2.2f ",forigsigmaY);
747 comment->AddText(s);
748 sprintf(s,"Type of original distribution: %s ",fType);
749 comment->AddText(s);
750 comment->Draw();
751
752}
753