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b661165c | 1 | // Author: Anders Vestbo <mailto:vestbo$fi.uib.no> |
2 | //*-- Copyright © ASV | |
108615fc | 3 | |
4 | #include <iostream.h> | |
5 | #include <math.h> | |
6 | #include "AliL3Logging.h" | |
7 | ||
8 | #include "AliL3ConfMapPoint.h" | |
9 | #include "AliL3SpacePointData.h" | |
10 | #include "AliL3Vertex.h" | |
11 | #include "AliL3ConfMapTrack.h" | |
12 | ||
b661165c | 13 | //_____________________________________________________________ |
14 | // AliL3ConfMapPoint | |
15 | // | |
16 | // Hit class for conformal mapper | |
17 | ||
18 | ClassImp(AliL3ConfMapPoint) | |
108615fc | 19 | |
20 | AliL3ConfMapPoint::AliL3ConfMapPoint() | |
21 | { | |
22 | //Constructor | |
23 | ||
24 | SetUsage(false); | |
25 | SetHitNumber(-1); | |
26 | SetX(0); | |
27 | SetY(0); | |
28 | SetZ(0); | |
29 | SetXerr(0); | |
30 | SetYerr(0); | |
31 | SetZerr(0); | |
32 | ||
33 | SetPhi(0.); | |
34 | SetEta(0.); | |
35 | ||
36 | SetXprime(0.); | |
37 | SetYprime(0.); | |
38 | SetXprimeerr(0.); | |
39 | SetYprimeerr(0.); | |
40 | SetIntPoint(0., 0., 0., 0., 0., 0.); | |
41 | SetShiftedCoord(); | |
5dd30052 | 42 | SetMCTrackID(0,0,0); |
108615fc | 43 | } |
44 | ||
45 | AliL3ConfMapPoint::~AliL3ConfMapPoint() | |
46 | { | |
47 | // Destructor. | |
48 | // Does nothing except destruct. | |
49 | } | |
50 | ||
51 | Bool_t AliL3ConfMapPoint::ReadHits(AliL3SpacePointData* hits ){ | |
355debe1 | 52 | |
108615fc | 53 | SetHitNumber(hits->fID); |
54 | SetPadRow(hits->fPadRow); | |
55 | Int_t slice = (hits->fID>>25) & 0x7f; | |
56 | SetSector(slice); | |
57 | SetX(hits->fX); | |
58 | SetY(hits->fY); | |
59 | SetZ(hits->fZ); | |
60 | SetXerr(sqrt(hits->fXYErr)); | |
61 | SetYerr(sqrt(hits->fXYErr)); | |
62 | SetZerr(sqrt(hits->fZErr)); | |
63 | return kTRUE; | |
64 | } | |
65 | ||
355debe1 | 66 | void AliL3ConfMapPoint::Reset() |
67 | { | |
68 | //Reset this point. | |
69 | SetUsage(kFALSE); | |
70 | SetS(0); | |
71 | nextRowHit = 0; | |
72 | nextVolumeHit=0; | |
73 | nextTrackHit=0; | |
74 | } | |
75 | ||
108615fc | 76 | void AliL3ConfMapPoint::Setup(AliL3Vertex *vertex) |
77 | { | |
78 | //Setup. Sets the vertex, conformal coordinates, and phi and eta of each hit. | |
79 | ||
80 | SetIntPoint(vertex->GetX(), vertex->GetY(), vertex->GetZ(), | |
81 | vertex->GetXErr(), vertex->GetYErr(), vertex->GetZErr()); | |
82 | SetShiftedCoord(); | |
83 | SetConfCoord(); | |
84 | // The angles are set properly if they are set after the interaction point and the shifted coordinates | |
85 | SetAngles(); | |
86 | //SetDist(0., 0.); | |
87 | ||
88 | return; | |
89 | } | |
90 | ||
91 | void AliL3ConfMapPoint::SetIntPoint(const Double_t in_x,const Double_t in_y, | |
92 | const Double_t in_z, | |
93 | const Double_t in_x_err, const Double_t in_y_err, | |
94 | const Double_t in_z_err) | |
95 | { | |
96 | // Defines a new interaction point. This point is needed to calculate | |
97 | // the conformal coordinates. | |
98 | ||
99 | SetXt(in_x); | |
100 | SetYt(in_y); | |
101 | SetZt(in_z); | |
102 | SetXterr(in_x_err); | |
103 | SetYterr(in_y_err); | |
104 | SetZterr(in_z_err); | |
105 | ||
106 | return; | |
107 | } | |
108 | ||
109 | void AliL3ConfMapPoint::SetAllCoord(const AliL3ConfMapPoint *preceding_hit) | |
110 | { | |
111 | // Sets the interaction point, the shifted coordinates, and the conformal mapping coordinates. | |
112 | // These values are calculated from the interaction point of the given cluster which should be a | |
113 | // already found cluster on the same track. | |
114 | ||
115 | if (this == preceding_hit) { | |
116 | SetIntPoint(preceding_hit->GetX(), preceding_hit->GetY(), preceding_hit->GetZ(), | |
117 | preceding_hit->GetXerr(), preceding_hit->GetYerr(), preceding_hit->GetZerr()); | |
118 | } | |
119 | ||
120 | else { | |
121 | SetIntPoint(preceding_hit->GetXt(), preceding_hit->GetYt(), preceding_hit->GetZt(), | |
122 | preceding_hit->GetXterr(), preceding_hit->GetYterr(), preceding_hit->GetZterr()); | |
123 | } | |
124 | ||
125 | SetShiftedCoord(); | |
126 | SetConfCoord(); | |
127 | ||
128 | return; | |
129 | } | |
130 | ||
131 | void AliL3ConfMapPoint::SetShiftedCoord() | |
132 | { | |
133 | // Sets the coordinates with resepct to the given vertex point | |
134 | ||
135 | SetXv(GetX() - fXt); | |
136 | SetYv(GetY() - fYt); | |
137 | SetZv(GetZ() - fZt); | |
138 | /* | |
139 | SetXverr(TMath::Sqrt(GetXerr()*GetXerr() + fXterr*fXterr)); | |
140 | SetYverr(TMath::Sqrt(GetYerr()*GetYerr() + fYterr*fYterr)); | |
141 | SetZverr(TMath::Sqrt(GetZerr()*GetZerr() + fZterr*fZterr)); | |
142 | */ | |
143 | return; | |
144 | } | |
145 | ||
146 | void AliL3ConfMapPoint::SetConfCoord() | |
147 | { | |
148 | // Calculates the conformal coordinates of one cluster. | |
149 | // If the option "vertex_constraint" applies the interaction point is | |
150 | // assumed to be at (0, 0, 0). Otherwise the function will use the | |
151 | // interaction point specified by fXt and fYt. | |
152 | ||
153 | Double_t r2; | |
154 | Double_t xyErrorScale = 1; | |
155 | Double_t szErrorScale = 1; | |
156 | ||
157 | if ((r2 = fXv*fXv + fYv*fYv)) | |
158 | { | |
159 | fXprime = fXv / r2; | |
160 | fYprime = -fYv / r2; | |
161 | // 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); | |
162 | // 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); | |
163 | ||
164 | ||
165 | //set weights: | |
166 | //fWxy = r2*r2 / (TMath::Power(xyErrorScale,2)*(TMath::Power(xerr,2)+TMath::Power(yerr,2))); | |
167 | fWxy = r2*r2 / ((xyErrorScale*xyErrorScale)*((xerr*xerr)+(yerr*yerr))); | |
168 | s = 0; //track trajectory | |
169 | //fWz = (Double_t)(1./TMath::Power(szErrorScale*zerr,2)); | |
170 | fWz = (Double_t)(1./(szErrorScale*zerr*zerr)); | |
171 | } | |
172 | ||
173 | else { | |
174 | fXprime = 0.; | |
175 | fYprime = 0.; | |
176 | fXprimeerr = 0.; | |
177 | fYprimeerr = 0.; | |
178 | fWxy = 0; | |
179 | fWz = 0; | |
180 | s = 0; | |
181 | } | |
182 | ||
183 | return; | |
184 | } | |
185 | ||
186 | void AliL3ConfMapPoint::SetAngles() | |
187 | { | |
188 | // Calculates the angle phi and the pseudorapidity eta for each cluster. | |
189 | /* | |
190 | Double_t r = TMath::Sqrt(x*x + y*y); | |
191 | ||
192 | fPhi = TMath::ATan2(y,x); | |
193 | if(fPhi<0) fPhi = fPhi + 2*TMath::Pi(); | |
194 | fEta = 3.*z/(TMath::Abs(z)+2.*r); | |
195 | return; | |
196 | */ | |
197 | // Double_t r3dim = TMath::Sqrt(fXv*fXv + fYv*fYv + fZv*fZv); | |
198 | Double_t r3dim = sqrt(fXv*fXv + fYv*fYv + fZv*fZv); | |
199 | //Double_t r2dim = TMath::Sqrt(fXv*fXv + fYv*fYv); | |
200 | ||
201 | /*if (r2dim == 0.) { | |
202 | // If r2dim == 0 the pseudorapidity eta cannot be calculated (division by zero)! | |
203 | // This can only happen if the point is lying on the z-axis and this should never be possible. | |
204 | cerr << "The pseudorapidity eta cannot be calculated (division by zero)! Set to 1.e-10." << endl; | |
205 | r2dim = 1.e-10; | |
206 | } | |
207 | ||
208 | if (fXv == 0.) { | |
209 | fPhi = (fYv > 0.) ? TMath::Pi() / 2. : - TMath::Pi() / 2.; | |
210 | } | |
211 | ||
212 | else { | |
213 | fPhi = (fXv > 0.) ? TMath::ASin(fYv/r2dim) : TMath::Pi() - TMath::ASin(fYv/r2dim); | |
214 | } | |
215 | ||
216 | if (fPhi < 0.) { | |
217 | fPhi += 2. * TMath::Pi(); | |
218 | } | |
219 | */ | |
220 | //fPhi = TMath::ATan2(y,x); | |
221 | fPhi = atan2(y,x); | |
222 | //if(fPhi<0) fPhi = fPhi + 2*TMath::Pi(); | |
223 | ||
224 | //fEta = 0.5 * TMath::Log((r3dim + fZv)/(r3dim - fZv)); | |
225 | fEta = 0.5 * log((r3dim + fZv)/(r3dim - fZv)); | |
226 | return; | |
227 | } | |
228 | /* | |
229 | AliL3ConfMapTrack *AliL3ConfMapPoint::GetTrack(TClonesArray *tracks) const | |
230 | { | |
231 | // Returns the pointer to the track to which this hit belongs. | |
232 | ||
233 | return (AliL3ConfMapTrack*)tracks->At(this->GetTrackNumber()); | |
234 | } | |
235 | */ |