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Commit | Line | Data |
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b661165c | 1 | // Author: Anders Vestbo <mailto:vestbo$fi.uib.no> |
2 | //*-- Copyright © ASV | |
108615fc | 3 | |
118c26c3 | 4 | #include "AliL3StandardIncludes.h" |
108615fc | 5 | |
118c26c3 | 6 | #include "AliL3Logging.h" |
108615fc | 7 | #include "AliL3ConfMapPoint.h" |
8 | #include "AliL3SpacePointData.h" | |
9 | #include "AliL3Vertex.h" | |
10 | #include "AliL3ConfMapTrack.h" | |
11 | ||
b661165c | 12 | //_____________________________________________________________ |
13 | // AliL3ConfMapPoint | |
14 | // | |
15 | // Hit class for conformal mapper | |
16 | ||
17 | ClassImp(AliL3ConfMapPoint) | |
108615fc | 18 | |
19 | AliL3ConfMapPoint::AliL3ConfMapPoint() | |
20 | { | |
21 | //Constructor | |
22 | ||
23 | SetUsage(false); | |
24 | SetHitNumber(-1); | |
25 | SetX(0); | |
26 | SetY(0); | |
27 | SetZ(0); | |
28 | SetXerr(0); | |
29 | SetYerr(0); | |
30 | SetZerr(0); | |
31 | ||
32 | SetPhi(0.); | |
33 | SetEta(0.); | |
34 | ||
35 | SetXprime(0.); | |
36 | SetYprime(0.); | |
37 | SetXprimeerr(0.); | |
38 | SetYprimeerr(0.); | |
39 | SetIntPoint(0., 0., 0., 0., 0., 0.); | |
40 | SetShiftedCoord(); | |
5dd30052 | 41 | SetMCTrackID(0,0,0); |
108615fc | 42 | } |
43 | ||
44 | AliL3ConfMapPoint::~AliL3ConfMapPoint() | |
45 | { | |
46 | // Destructor. | |
47 | // Does nothing except destruct. | |
48 | } | |
49 | ||
50 | Bool_t AliL3ConfMapPoint::ReadHits(AliL3SpacePointData* hits ){ | |
355debe1 | 51 | |
108615fc | 52 | SetHitNumber(hits->fID); |
53 | SetPadRow(hits->fPadRow); | |
54 | Int_t slice = (hits->fID>>25) & 0x7f; | |
55 | SetSector(slice); | |
56 | SetX(hits->fX); | |
57 | SetY(hits->fY); | |
58 | SetZ(hits->fZ); | |
59 | SetXerr(sqrt(hits->fXYErr)); | |
60 | SetYerr(sqrt(hits->fXYErr)); | |
61 | SetZerr(sqrt(hits->fZErr)); | |
62 | return kTRUE; | |
63 | } | |
64 | ||
355debe1 | 65 | void AliL3ConfMapPoint::Reset() |
66 | { | |
67 | //Reset this point. | |
68 | SetUsage(kFALSE); | |
69 | SetS(0); | |
70 | nextRowHit = 0; | |
71 | nextVolumeHit=0; | |
72 | nextTrackHit=0; | |
73 | } | |
74 | ||
108615fc | 75 | void AliL3ConfMapPoint::Setup(AliL3Vertex *vertex) |
76 | { | |
77 | //Setup. Sets the vertex, conformal coordinates, and phi and eta of each hit. | |
78 | ||
79 | SetIntPoint(vertex->GetX(), vertex->GetY(), vertex->GetZ(), | |
80 | vertex->GetXErr(), vertex->GetYErr(), vertex->GetZErr()); | |
81 | SetShiftedCoord(); | |
82 | SetConfCoord(); | |
83 | // The angles are set properly if they are set after the interaction point and the shifted coordinates | |
84 | SetAngles(); | |
85 | //SetDist(0., 0.); | |
86 | ||
87 | return; | |
88 | } | |
89 | ||
90 | void AliL3ConfMapPoint::SetIntPoint(const Double_t in_x,const Double_t in_y, | |
91 | const Double_t in_z, | |
92 | const Double_t in_x_err, const Double_t in_y_err, | |
93 | const Double_t in_z_err) | |
94 | { | |
95 | // Defines a new interaction point. This point is needed to calculate | |
96 | // the conformal coordinates. | |
97 | ||
98 | SetXt(in_x); | |
99 | SetYt(in_y); | |
100 | SetZt(in_z); | |
101 | SetXterr(in_x_err); | |
102 | SetYterr(in_y_err); | |
103 | SetZterr(in_z_err); | |
104 | ||
105 | return; | |
106 | } | |
107 | ||
108 | void AliL3ConfMapPoint::SetAllCoord(const AliL3ConfMapPoint *preceding_hit) | |
109 | { | |
110 | // Sets the interaction point, the shifted coordinates, and the conformal mapping coordinates. | |
111 | // These values are calculated from the interaction point of the given cluster which should be a | |
112 | // already found cluster on the same track. | |
113 | ||
114 | if (this == preceding_hit) { | |
115 | SetIntPoint(preceding_hit->GetX(), preceding_hit->GetY(), preceding_hit->GetZ(), | |
116 | preceding_hit->GetXerr(), preceding_hit->GetYerr(), preceding_hit->GetZerr()); | |
117 | } | |
118 | ||
119 | else { | |
120 | SetIntPoint(preceding_hit->GetXt(), preceding_hit->GetYt(), preceding_hit->GetZt(), | |
121 | preceding_hit->GetXterr(), preceding_hit->GetYterr(), preceding_hit->GetZterr()); | |
122 | } | |
123 | ||
124 | SetShiftedCoord(); | |
125 | SetConfCoord(); | |
126 | ||
127 | return; | |
128 | } | |
129 | ||
130 | void AliL3ConfMapPoint::SetShiftedCoord() | |
131 | { | |
132 | // Sets the coordinates with resepct to the given vertex point | |
133 | ||
134 | SetXv(GetX() - fXt); | |
135 | SetYv(GetY() - fYt); | |
136 | SetZv(GetZ() - fZt); | |
137 | /* | |
138 | SetXverr(TMath::Sqrt(GetXerr()*GetXerr() + fXterr*fXterr)); | |
139 | SetYverr(TMath::Sqrt(GetYerr()*GetYerr() + fYterr*fYterr)); | |
140 | SetZverr(TMath::Sqrt(GetZerr()*GetZerr() + fZterr*fZterr)); | |
141 | */ | |
142 | return; | |
143 | } | |
144 | ||
145 | void AliL3ConfMapPoint::SetConfCoord() | |
146 | { | |
147 | // Calculates the conformal coordinates of one cluster. | |
148 | // If the option "vertex_constraint" applies the interaction point is | |
149 | // assumed to be at (0, 0, 0). Otherwise the function will use the | |
150 | // interaction point specified by fXt and fYt. | |
151 | ||
152 | Double_t r2; | |
153 | Double_t xyErrorScale = 1; | |
154 | Double_t szErrorScale = 1; | |
155 | ||
156 | if ((r2 = fXv*fXv + fYv*fYv)) | |
157 | { | |
158 | fXprime = fXv / r2; | |
159 | fYprime = -fYv / r2; | |
160 | // fXprimeerr = TMath::Sqrt(TMath::Power((-fXv * fXv + fYv*fYv) * fXverr, 2) + TMath::Power( 2*fXv*fYv*fYverr, 2)) / TMath::Power(fXv*fXv + fYv*fYv, 2); | |
161 | // fXprimeerr = TMath::Sqrt(TMath::Power((-fXv * fXv - 3*fYv*fYv) * fYverr, 2) + TMath::Power(-2*fXv*fYv*fXverr, 2)) / TMath::Power(fXv*fXv + fYv*fYv, 2); | |
162 | ||
163 | ||
164 | //set weights: | |
165 | //fWxy = r2*r2 / (TMath::Power(xyErrorScale,2)*(TMath::Power(xerr,2)+TMath::Power(yerr,2))); | |
166 | fWxy = r2*r2 / ((xyErrorScale*xyErrorScale)*((xerr*xerr)+(yerr*yerr))); | |
167 | s = 0; //track trajectory | |
168 | //fWz = (Double_t)(1./TMath::Power(szErrorScale*zerr,2)); | |
169 | fWz = (Double_t)(1./(szErrorScale*zerr*zerr)); | |
170 | } | |
171 | ||
172 | else { | |
173 | fXprime = 0.; | |
174 | fYprime = 0.; | |
175 | fXprimeerr = 0.; | |
176 | fYprimeerr = 0.; | |
177 | fWxy = 0; | |
178 | fWz = 0; | |
179 | s = 0; | |
180 | } | |
181 | ||
182 | return; | |
183 | } | |
184 | ||
185 | void AliL3ConfMapPoint::SetAngles() | |
186 | { | |
187 | // Calculates the angle phi and the pseudorapidity eta for each cluster. | |
188 | /* | |
189 | Double_t r = TMath::Sqrt(x*x + y*y); | |
190 | ||
191 | fPhi = TMath::ATan2(y,x); | |
192 | if(fPhi<0) fPhi = fPhi + 2*TMath::Pi(); | |
193 | fEta = 3.*z/(TMath::Abs(z)+2.*r); | |
194 | return; | |
195 | */ | |
196 | // Double_t r3dim = TMath::Sqrt(fXv*fXv + fYv*fYv + fZv*fZv); | |
197 | Double_t r3dim = sqrt(fXv*fXv + fYv*fYv + fZv*fZv); | |
198 | //Double_t r2dim = TMath::Sqrt(fXv*fXv + fYv*fYv); | |
199 | ||
200 | /*if (r2dim == 0.) { | |
201 | // If r2dim == 0 the pseudorapidity eta cannot be calculated (division by zero)! | |
202 | // This can only happen if the point is lying on the z-axis and this should never be possible. | |
203 | cerr << "The pseudorapidity eta cannot be calculated (division by zero)! Set to 1.e-10." << endl; | |
204 | r2dim = 1.e-10; | |
205 | } | |
206 | ||
207 | if (fXv == 0.) { | |
208 | fPhi = (fYv > 0.) ? TMath::Pi() / 2. : - TMath::Pi() / 2.; | |
209 | } | |
210 | ||
211 | else { | |
212 | fPhi = (fXv > 0.) ? TMath::ASin(fYv/r2dim) : TMath::Pi() - TMath::ASin(fYv/r2dim); | |
213 | } | |
214 | ||
215 | if (fPhi < 0.) { | |
216 | fPhi += 2. * TMath::Pi(); | |
217 | } | |
218 | */ | |
219 | //fPhi = TMath::ATan2(y,x); | |
220 | fPhi = atan2(y,x); | |
221 | //if(fPhi<0) fPhi = fPhi + 2*TMath::Pi(); | |
222 | ||
223 | //fEta = 0.5 * TMath::Log((r3dim + fZv)/(r3dim - fZv)); | |
224 | fEta = 0.5 * log((r3dim + fZv)/(r3dim - fZv)); | |
225 | return; | |
226 | } | |
227 | /* | |
228 | AliL3ConfMapTrack *AliL3ConfMapPoint::GetTrack(TClonesArray *tracks) const | |
229 | { | |
230 | // Returns the pointer to the track to which this hit belongs. | |
231 | ||
232 | return (AliL3ConfMapTrack*)tracks->At(this->GetTrackNumber()); | |
233 | } | |
234 | */ |