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87594435 | 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 | //------------------------------------------------------------------------- | |
75fb37cc | 17 | // Class AliCluster |
18 | // This is the future base for managing the clusters in barrel detectors. | |
19 | // It is fully interfaced with the ROOT geometrical modeller TGeo. | |
20 | // Each cluster contains XYZ coordinates in the local tracking c.s. and | |
21 | // the unique ID of the sensitive detector element which continas the | |
22 | // cluster. The coordinates in global c.s. are computed using the interface | |
23 | // to TGeo and will be not overwritten by the derived sub-detector cluster | |
24 | // classes. | |
25 | // | |
26 | // cvetan.cheshkov@cern.ch & jouri.belikov@cern.ch 5/3/2007 | |
87594435 | 27 | //------------------------------------------------------------------------- |
28 | ||
75fb37cc | 29 | #include <TGeoManager.h> |
30 | #include <TGeoMatrix.h> | |
31 | #include <TGeoPhysicalNode.h> | |
494a045f | 32 | #include <TMath.h> |
75fb37cc | 33 | |
87594435 | 34 | #include "AliCluster.h" |
75fb37cc | 35 | #include "AliLog.h" |
36 | #include "AliAlignObj.h" | |
87594435 | 37 | |
38 | ClassImp(AliCluster) | |
75fb37cc | 39 | |
40 | //______________________________________________________________________________ | |
41 | AliCluster::AliCluster(): | |
42 | TObject(), | |
43 | fX(0), | |
44 | fY(0), | |
45 | fZ(0), | |
46 | fSigmaY2(0), | |
47 | fSigmaZ2(0), | |
48 | fSigmaYZ(0), | |
49 | fVolumeId(0), | |
50 | fIsMisaligned(kFALSE) | |
51 | { | |
52 | // Default constructor | |
87594435 | 53 | fTracks[0]=fTracks[1]=fTracks[2]=-3141593; |
87594435 | 54 | } |
55 | ||
75fb37cc | 56 | //______________________________________________________________________________ |
57 | AliCluster::AliCluster(UShort_t volId, | |
58 | const Float_t *hit, | |
59 | Float_t x, | |
60 | Float_t sigyz, | |
61 | const Int_t *lab): | |
62 | TObject(), | |
63 | fX(x), | |
64 | fY(hit[0]), | |
65 | fZ(hit[1]), | |
66 | fSigmaY2(hit[2]), | |
67 | fSigmaZ2(hit[3]), | |
68 | fSigmaYZ(sigyz), | |
69 | fVolumeId(volId), | |
70 | fIsMisaligned(kFALSE) | |
968c248e | 71 | { |
75fb37cc | 72 | // Constructor |
73 | if (lab) { | |
74 | fTracks[0] = lab[0]; | |
75 | fTracks[1] = lab[1]; | |
76 | fTracks[2] = lab[2]; | |
77 | } | |
78 | else | |
79 | fTracks[0]=fTracks[1]=fTracks[2]=-3141593; | |
80 | } | |
81 | ||
82 | //______________________________________________________________________________ | |
83 | AliCluster::AliCluster(UShort_t volId, | |
84 | Float_t x, Float_t y, Float_t z, | |
85 | Float_t sy2, Float_t sz2, Float_t syz, | |
86 | const Int_t *lab): | |
87 | TObject(), | |
88 | fX(x), | |
89 | fY(y), | |
90 | fZ(z), | |
91 | fSigmaY2(sy2), | |
92 | fSigmaZ2(sz2), | |
93 | fSigmaYZ(syz), | |
94 | fVolumeId(volId), | |
95 | fIsMisaligned(kFALSE) | |
96 | { | |
97 | // Constructor | |
98 | if (lab) { | |
99 | fTracks[0] = lab[0]; | |
100 | fTracks[1] = lab[1]; | |
101 | fTracks[2] = lab[2]; | |
102 | } | |
103 | else | |
104 | fTracks[0]=fTracks[1]=fTracks[2]=-3141593; | |
105 | } | |
106 | ||
107 | //______________________________________________________________________________ | |
108 | AliCluster::AliCluster(const AliCluster& cluster): | |
109 | TObject(cluster), | |
110 | fX(cluster.fX), | |
111 | fY(cluster.fY), | |
112 | fZ(cluster.fZ), | |
113 | fSigmaY2(cluster.fSigmaY2), | |
114 | fSigmaZ2(cluster.fSigmaZ2), | |
115 | fSigmaYZ(cluster.fSigmaYZ), | |
116 | fVolumeId(cluster.fVolumeId), | |
117 | fIsMisaligned(cluster.fIsMisaligned) | |
118 | { | |
119 | // Copy constructor | |
120 | fTracks[0] = cluster.fTracks[0]; | |
121 | fTracks[1] = cluster.fTracks[1]; | |
122 | fTracks[2] = cluster.fTracks[2]; | |
123 | } | |
124 | ||
125 | //______________________________________________________________________________ | |
126 | AliCluster & AliCluster::operator=(const AliCluster& cluster) | |
127 | { | |
128 | // Assignment operator | |
129 | ||
130 | if(&cluster == this) return *this; | |
131 | ||
132 | fX = cluster.fX; | |
133 | fY = cluster.fY; | |
134 | fZ = cluster.fZ; | |
135 | fSigmaY2 = cluster.fSigmaY2; | |
136 | fSigmaZ2 = cluster.fSigmaZ2; | |
137 | fSigmaYZ = cluster.fSigmaYZ; | |
138 | fVolumeId = cluster.fVolumeId; | |
139 | fIsMisaligned = cluster.fIsMisaligned; | |
140 | ||
141 | fTracks[0] = cluster.fTracks[0]; | |
142 | fTracks[1] = cluster.fTracks[1]; | |
143 | fTracks[2] = cluster.fTracks[2]; | |
144 | ||
145 | return *this; | |
146 | } | |
147 | ||
c47d9105 | 148 | //______________________________________________________________________________ |
d999f2e6 | 149 | void AliCluster::Print(Option_t* /*option*/) const |
c47d9105 | 150 | { |
151 | // Print cluster information. | |
152 | ||
153 | printf("AliCluster pos=(%.4f, %.4f, %.4f), s_y2=%f, s_z2=%f, s_yz=%f, vol=%hu\n", | |
154 | fX, fY, fZ, fSigmaY2, fSigmaZ2, fSigmaYZ, fVolumeId); | |
155 | Float_t g[3]; | |
156 | if (GetGlobalXYZ(g)) | |
157 | printf(" global_pos=(%.4f, %.4f, %.4f)\n", g[0], g[1], g[2]); | |
158 | ||
159 | } | |
160 | ||
75fb37cc | 161 | //______________________________________________________________________________ |
162 | Bool_t AliCluster::GetGlobalXYZ(Float_t xyz[3]) const | |
163 | { | |
164 | // Get the global coordinates of the cluster | |
165 | // All the needed information is taken only | |
166 | // from TGeo. | |
167 | ||
168 | xyz[0] = xyz[1] = xyz[2] = 0; | |
169 | ||
170 | if (!gGeoManager || !gGeoManager->IsClosed()) { | |
171 | AliError("Can't get the global coordinates! gGeoManager doesn't exist or it is still opened!"); | |
172 | return kFALSE; | |
173 | } | |
174 | ||
175 | const TGeoHMatrix *mt = GetTracking2LocalMatrix(); | |
176 | if (!mt) return kFALSE; | |
177 | Double_t txyz[3] = {fX, fY, fZ}; | |
178 | Double_t lxyz[3] = {0, 0, 0}; | |
179 | mt->LocalToMaster(txyz,lxyz); | |
180 | ||
181 | TGeoHMatrix *ml = GetMatrix(); | |
182 | if (!ml) return kFALSE; | |
183 | Double_t gxyz[3] = {0, 0, 0}; | |
184 | ml->LocalToMaster(lxyz,gxyz); | |
185 | xyz[0] = gxyz[0]; xyz[1] = gxyz[1]; xyz[2] = gxyz[2]; | |
186 | return kTRUE; | |
187 | } | |
188 | ||
189 | //______________________________________________________________________________ | |
190 | Bool_t AliCluster::GetGlobalCov(Float_t cov[6]) const | |
191 | { | |
192 | // Get the global covariance matrix of the cluster coordinates | |
193 | // All the needed information is taken only | |
194 | // from TGeo. | |
195 | for (Int_t i = 0; i < 6; i++) cov[i] = 0; | |
196 | ||
197 | if (!gGeoManager || !gGeoManager->IsClosed()) { | |
198 | AliError("Can't get the global coordinates! gGeoManager doesn't exist or it is still opened!"); | |
199 | return kFALSE; | |
200 | } | |
201 | ||
202 | const TGeoHMatrix *mt = GetTracking2LocalMatrix(); | |
203 | if (!mt) return kFALSE; | |
204 | ||
205 | TGeoHMatrix *ml = GetMatrix(); | |
206 | if (!ml) return kFALSE; | |
207 | ||
208 | TGeoHMatrix m; | |
209 | Double_t tcov[9] = { 0, 0, 0, 0, fSigmaY2, fSigmaYZ, 0, fSigmaYZ, fSigmaZ2 }; | |
210 | m.SetRotation(tcov); | |
211 | m.Multiply(&mt->Inverse()); | |
212 | m.Multiply(&ml->Inverse()); | |
213 | m.MultiplyLeft(mt); | |
214 | m.MultiplyLeft(ml); | |
215 | Double_t *ncov = m.GetRotationMatrix(); | |
216 | cov[0] = ncov[0]; cov[1] = ncov[1]; cov[2] = ncov[2]; | |
217 | cov[3] = ncov[4]; cov[4] = ncov[5]; | |
218 | cov[5] = ncov[8]; | |
219 | ||
220 | return kTRUE; | |
221 | } | |
222 | ||
223 | //______________________________________________________________________________ | |
224 | Bool_t AliCluster::GetXRefPlane(Float_t &xref) const | |
225 | { | |
226 | // Get the distance between the origin and the ref.plane. | |
227 | // All the needed information is taken only | |
228 | // from TGeo. | |
229 | xref = 0; | |
230 | ||
231 | const TGeoHMatrix *mt = GetTracking2LocalMatrix(); | |
232 | if (!mt) return kFALSE; | |
233 | ||
234 | TGeoHMatrix *ml = GetMatrix(); | |
235 | if (!ml) return kFALSE; | |
236 | ||
237 | TGeoHMatrix m = *mt; | |
238 | m.MultiplyLeft(ml); | |
239 | ||
7105349f | 240 | xref = -(m.Inverse()).GetTranslation()[0]; |
75fb37cc | 241 | return kTRUE; |
242 | } | |
243 | ||
494a045f | 244 | //______________________________________________________________________________ |
245 | Bool_t AliCluster::GetXAlphaRefPlane(Float_t &x, Float_t &alpha) const | |
246 | { | |
247 | // Get the distance between the origin and the ref. plane together with | |
248 | // the rotation anlge of the ref. plane. | |
249 | // All the needed information is taken only | |
250 | // from TGeo. | |
251 | const TGeoHMatrix *mt = GetTracking2LocalMatrix(); | |
252 | if (!mt) return kFALSE; | |
253 | ||
254 | const TGeoHMatrix *ml = GetMatrix(); | |
255 | if (!ml) return kFALSE; | |
256 | ||
257 | TGeoHMatrix m(*ml); | |
258 | m.Multiply(mt); | |
259 | const Double_t txyz[3]={0.}; Double_t xyz[3]={0.}; | |
260 | m.LocalToMaster(txyz,xyz); | |
261 | ||
262 | x=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]); | |
263 | ||
264 | Double_t a=TMath::ATan2(xyz[1],xyz[0]); | |
265 | if (a<0) a+=TMath::TwoPi(); | |
266 | else if (a>=TMath::TwoPi()) a-=TMath::TwoPi(); | |
267 | alpha=a; | |
268 | ||
269 | return kTRUE; | |
270 | } | |
271 | ||
75fb37cc | 272 | //______________________________________________________________________________ |
273 | Bool_t AliCluster::Misalign() | |
274 | { | |
275 | // ... | |
276 | // All the needed information is taken only | |
277 | // from TGeo. | |
278 | if (!gGeoManager || !gGeoManager->IsClosed()) { | |
279 | AliError("Can't get the PN entry! gGeoManager doesn't exist or it is still opened!"); | |
280 | return kFALSE; | |
281 | } | |
282 | ||
283 | if (fIsMisaligned) { | |
284 | AliError("The cluster was already misaligned!"); | |
285 | return kFALSE; | |
286 | } | |
287 | ||
288 | const TGeoHMatrix *mt = GetTracking2LocalMatrix(); | |
289 | if (!mt) return kFALSE; | |
290 | ||
291 | TGeoHMatrix *ml = GetMatrix(); | |
292 | if (!ml) return kFALSE; | |
293 | ||
294 | TGeoHMatrix *mlorig = GetMatrix(kTRUE); | |
295 | if (!mlorig) return kFALSE; | |
296 | ||
297 | TGeoHMatrix delta = *mt; | |
298 | delta.MultiplyLeft(ml); | |
299 | delta.MultiplyLeft(&(mlorig->Inverse())); | |
300 | delta.MultiplyLeft(&(mt->Inverse())); | |
301 | ||
302 | Double_t xyzorig[3] = {fX, fY, fZ}; | |
303 | Double_t xyz[3] = {0, 0, 0}; | |
304 | delta.LocalToMaster(xyzorig,xyz); | |
305 | fX = xyz[0]; fY = xyz[1]; fZ = xyz[2]; | |
306 | fIsMisaligned = kTRUE; | |
307 | return kTRUE; | |
308 | } | |
309 | ||
310 | //______________________________________________________________________________ | |
311 | TGeoHMatrix* AliCluster::GetMatrix(Bool_t original) const | |
312 | { | |
313 | // Get the matrix which transforms from the | |
314 | // local TGeo alignable volume c.s. to the global one. | |
315 | // In case the cluster was already misaligned, get the | |
316 | // ideal matrix from TGeo. The option 'original' | |
317 | // can be used to force the calculation of the ideal | |
318 | // matrix. | |
319 | if (!fIsMisaligned && (original == kFALSE)) { | |
b63e594f | 320 | return AliGeomManager::GetMatrix(fVolumeId); |
75fb37cc | 321 | } |
322 | else { | |
b63e594f | 323 | return AliGeomManager::GetOrigGlobalMatrix(fVolumeId); |
75fb37cc | 324 | } |
325 | } | |
326 | ||
327 | //______________________________________________________________________________ | |
328 | const TGeoHMatrix* AliCluster::GetTracking2LocalMatrix() const | |
329 | { | |
330 | // Get the matrix which is stored with the PN entries in TGeo. | |
331 | // The matrix makes the transformation from the tracking c.s. to | |
559157f8 | 332 | // the local one. |
b63e594f | 333 | return AliGeomManager::GetTracking2LocalMatrix(fVolumeId); |
75fb37cc | 334 | } |
335 |