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6b88e8ee | 1 | //$Id$ |
2 | ||
3 | // Author: Anders Vestbo <mailto:vestbo@fi.uib.no> | |
4 | //*-- Copyright © ASV | |
5 | ||
6 | #include <string.h> | |
7 | #include "AliL3Logging.h" | |
8 | #include "AliL3HistogramAdaptive.h" | |
9 | #include "AliL3Transform.h" | |
10 | #include "AliL3Track.h" | |
11 | ||
12 | //_____________________________________________________________ | |
13 | // AliL3HistogramAdaptive | |
14 | // | |
15 | // 2D histogram class | |
16 | ||
17 | ClassImp(AliL3HistogramAdaptive) | |
18 | ||
19 | AliL3HistogramAdaptive::AliL3HistogramAdaptive() : AliL3Histogram() | |
20 | { | |
21 | fKvalue=0; | |
22 | fPtstep=0; | |
23 | } | |
24 | ||
25 | ||
26 | AliL3HistogramAdaptive::AliL3HistogramAdaptive(Char_t *name,Int_t firstpatch,Int_t lastpatch,Double_t minpt,Double_t maxpt, | |
27 | Int_t nybins,Double_t ymin,Double_t ymax) | |
28 | { | |
29 | strcpy(fName,name); | |
30 | ||
31 | fXmin = -1*AliL3Transform::GetBFact()*AliL3Transform::GetBField()/minpt; | |
32 | fXmax = AliL3Transform::GetBFact()*AliL3Transform::GetBField()/minpt; | |
33 | ||
34 | fPtstep = 0.1; | |
35 | fMinPt = minpt; | |
36 | fMaxPt = maxpt; | |
37 | fNxbins = InitPtBins(firstpatch,lastpatch,0.1); | |
38 | ||
39 | fNybins = nybins; | |
40 | fYmin = ymin; | |
41 | fYmax = ymax; | |
42 | fFirstXbin=1; | |
43 | fFirstYbin=1; | |
44 | fLastXbin = fNxbins; | |
45 | fLastYbin = fNybins; | |
46 | fNcells = (fNxbins+2)*(fNybins+2); | |
47 | ||
48 | fThreshold=0; | |
49 | fContent = new Int_t[fNcells]; | |
50 | Reset(); | |
51 | } | |
52 | ||
53 | AliL3HistogramAdaptive::~AliL3HistogramAdaptive() | |
54 | { | |
55 | if(fKvalue) | |
56 | delete [] fKvalue; | |
57 | } | |
58 | ||
59 | Int_t AliL3HistogramAdaptive::InitPtBins(Int_t firstpatch,Int_t lastpatch,Double_t xyresolution) | |
60 | { | |
61 | ||
62 | Double_t pt = fMinPt; | |
63 | AliL3Track *track=0; | |
64 | Float_t xyz1[3],xyz2[3]; | |
65 | Double_t angle1,angle2,diff_angle,s_tot,local_pt,pt_nplus1; | |
66 | Int_t nrows = AliL3Transform::GetLastRow(lastpatch)-AliL3Transform::GetFirstRow(firstpatch)+1; | |
67 | Int_t nptbins=0,index=-1; | |
68 | Int_t bounds = (Int_t)rint((fMaxPt-fMinPt)/fPtstep)+1; | |
69 | fKvalue = new Double_t[bounds]; | |
70 | ||
71 | while(pt < fMaxPt + fPtstep) | |
72 | { | |
73 | track = new AliL3Track(); | |
74 | track->SetPt(pt); | |
75 | track->SetPsi(0); | |
76 | track->SetCharge(1); | |
77 | track->SetFirstPoint(0,0,0); | |
78 | track->CalculateHelix(); | |
79 | ||
80 | track->GetCrossingPoint(AliL3Transform::GetFirstRow(firstpatch),xyz1); | |
81 | track->GetCrossingPoint(AliL3Transform::GetLastRow(lastpatch),xyz2); | |
82 | ||
83 | angle1 = atan2((xyz2[1] - track->GetCenterY()),(xyz2[0] - track->GetCenterX())); | |
84 | if(angle1 < 0) angle1 += 2.*AliL3Transform::Pi(); | |
85 | angle2 = atan2((xyz1[1] - track->GetCenterY()),(xyz1[0] - track->GetCenterX())); | |
86 | if(angle2 < 0) angle2 += 2.*AliL3Transform::Pi(); | |
87 | diff_angle = angle1 - angle2; | |
88 | diff_angle = fmod(diff_angle,2*AliL3Transform::Pi()); | |
89 | if((track->GetCharge()*diff_angle) > 0) diff_angle = diff_angle - track->GetCharge()*2.*AliL3Transform::Pi(); | |
90 | ||
91 | s_tot = fabs(diff_angle)*track->GetRadius(); | |
92 | ||
93 | index = (Int_t)rint((pt-fMinPt)/fPtstep); | |
94 | if(index < 0 || index > bounds) | |
95 | { | |
96 | cerr<<"AliL3HistogramAdaptive::InitPtBins : Index out of range "<<index<<endl; | |
97 | return 0; | |
98 | } | |
99 | //cout<<"Filling index "<<index<<" pt "<<pt<<" fMinPt "<<fMinPt<<" fPtstep "<<fPtstep<<endl; | |
100 | fKvalue[index] = xyresolution*sqrt(720/(nrows+4))/(AliL3Transform::GetBFact()*AliL3Transform::GetBField()*s_tot*s_tot); | |
101 | ||
102 | local_pt = pt; | |
103 | while(local_pt < pt + fPtstep) | |
104 | { | |
105 | if(local_pt > fMaxPt) break; | |
106 | pt_nplus1 = fKvalue[index]*local_pt*local_pt + local_pt; | |
107 | // cout<<"Pt "<<local_pt<<" binsize "<<(pt_nplus1-local_pt)<<endl; | |
108 | local_pt = pt_nplus1; | |
109 | nptbins++; | |
110 | } | |
111 | delete track; | |
112 | pt += fPtstep; | |
113 | } | |
114 | cout<<"Number of ptbins "<<nptbins*2<<endl; | |
115 | ||
116 | return nptbins*2; //Both negative and positive kappa. | |
117 | } | |
118 | ||
119 | ||
120 | void AliL3HistogramAdaptive::Fill(Double_t x,Double_t y,Int_t weight) | |
121 | { | |
122 | Int_t bin = FindBin(x,y); | |
123 | if(bin < 0) | |
124 | return; | |
125 | AddBinContent(bin,weight); | |
126 | ||
127 | } | |
128 | ||
129 | Int_t AliL3HistogramAdaptive::FindBin(Double_t x,Double_t y) | |
130 | { | |
131 | ||
132 | Int_t xbin = FindXbin(x); | |
133 | Int_t ybin = FindYbin(y); | |
134 | ||
135 | if(xbin < 0) | |
136 | return -1; | |
137 | return GetBin(xbin,ybin); | |
138 | } | |
139 | ||
140 | Int_t AliL3HistogramAdaptive::FindXbin(Double_t x) | |
141 | { | |
142 | if(x < fXmin || x > fXmax) | |
143 | return 0; | |
144 | ||
145 | Double_t pt = fabs(AliL3Transform::GetBFact()*AliL3Transform::GetBField()/x); | |
146 | ||
147 | if(pt < fMinPt || pt > fMaxPt) | |
148 | return -1; | |
149 | Double_t local_pt = fMinPt; | |
150 | Double_t pt_nplus1; | |
151 | Int_t index,bin=0; | |
152 | while(local_pt < fMaxPt) | |
153 | { | |
154 | index = (Int_t)rint((local_pt-fMinPt)/fPtstep); | |
155 | pt_nplus1 = fKvalue[index]*local_pt*local_pt + local_pt; | |
156 | //cout<<"Looking for pt "<<local_pt<<" pt_nplus1 "<<pt_nplus1<<" index "<<index<<endl; | |
157 | if(pt >= local_pt && pt < pt_nplus1) | |
158 | break; | |
159 | local_pt = pt_nplus1; | |
160 | bin++; | |
161 | } | |
162 | if(x < 0) | |
163 | return bin; | |
164 | else | |
165 | return fNxbins - bin; | |
166 | } | |
167 | ||
168 | Int_t AliL3HistogramAdaptive::FindYbin(Double_t y) | |
169 | { | |
170 | if(y < fYmin || y > fYmax) | |
171 | return 0; | |
172 | ||
173 | return 1 + (Int_t)(fNybins*(y-fYmin)/(fYmax-fYmin)); | |
174 | ||
175 | } | |
176 | ||
177 | Double_t AliL3HistogramAdaptive::GetBinCenterX(Int_t xbin) | |
178 | { | |
179 | Double_t local_pt = fMinPt; | |
180 | Double_t pt_nplus1=0; | |
181 | Int_t index,bin=0; | |
182 | ||
183 | while(local_pt < fMaxPt) | |
184 | { | |
185 | index = (Int_t)rint((local_pt-fMinPt)/fPtstep); | |
186 | pt_nplus1 = fKvalue[index]*local_pt*local_pt + local_pt; | |
187 | if(xbin == bin || xbin == fNxbins - bin) | |
188 | break; | |
189 | local_pt = pt_nplus1; | |
190 | bin++; | |
191 | } | |
192 | ||
193 | Double_t binwidth = (pt_nplus1 - local_pt); | |
194 | Double_t kappa = AliL3Transform::GetBFact()*AliL3Transform::GetBField()/(local_pt + binwidth*0.5); | |
195 | ||
196 | cout<<"Returning xbin "<<xbin<<" out of total "<<fNxbins<<endl; | |
197 | if(xbin < fNxbins/2) | |
198 | return -1.*kappa; | |
199 | else | |
200 | return kappa; | |
201 | ||
202 | //Double_t binwidth = (fXmax - fXmin) / fNxbins; | |
203 | //return fXmin + (xbin-1) * binwidth + 0.5*binwidth; | |
204 | } | |
205 | ||
206 | Double_t AliL3HistogramAdaptive::GetBinCenterY(Int_t ybin) | |
207 | { | |
208 | ||
209 | Double_t binwidth = (fYmax - fYmin) / fNybins; | |
210 | return fYmin + (ybin-1) * binwidth + 0.5*binwidth; | |
211 | ||
212 | } | |
213 | ||
214 | void AliL3HistogramAdaptive::Draw(Char_t *option) | |
215 | { | |
216 | #ifdef use_root | |
217 | if(!fRootHisto) | |
218 | CreateRootHisto(); | |
219 | ||
220 | Double_t kappa,psi; | |
221 | Int_t content,bin; | |
222 | for(Int_t i=0; i<fNxbins; i++) | |
223 | { | |
224 | kappa = GetBinCenterX(i); | |
225 | for(Int_t j=0; j<fNybins; j++) | |
226 | { | |
227 | psi = GetBinCenterY(j); | |
228 | bin = GetBin(i,j); | |
229 | content = GetBinContent(bin); | |
230 | fRootHisto->Fill(kappa,psi,content); | |
231 | } | |
232 | } | |
233 | fRootHisto->Draw(option); | |
234 | return; | |
235 | #endif | |
236 | cerr<<"AliL3HistogramAdaptive::Draw : You need to compile with ROOT in order to draw histogram"<<endl; | |
237 | } | |
238 | ||
239 | void AliL3HistogramAdaptive::Print() | |
240 | { | |
241 | cout<<"Printing content of histogram "<<fName<<endl; | |
242 | for(Int_t i=0; i<fNcells; i++) | |
243 | { | |
244 | if(GetBinContent(i)==0) continue; | |
245 | cout<<"Bin "<<i<<": "<<GetBinContent(i)<<endl; | |
246 | } | |
247 | ||
248 | } |