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e5eb5735 | 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 | // Class AliClusterTGeo | |
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 | |
27 | //------------------------------------------------------------------------- | |
28 | ||
29 | #include <TGeoManager.h> | |
30 | #include <TGeoMatrix.h> | |
31 | #include <TGeoPhysicalNode.h> | |
32 | ||
33 | #include "AliClusterTGeo.h" | |
34 | #include "AliLog.h" | |
35 | #include "AliAlignObj.h" | |
36 | ||
37 | ClassImp(AliClusterTGeo) | |
38 | ||
39 | //______________________________________________________________________________ | |
40 | AliClusterTGeo::AliClusterTGeo(): | |
41 | TObject(), | |
42 | fX(0), | |
43 | fY(0), | |
44 | fZ(0), | |
45 | fSigmaY2(0), | |
46 | fSigmaZ2(0), | |
47 | fSigmaYZ(0), | |
48 | fVolumeId(0), | |
49 | fIsMisaligned(kFALSE) | |
50 | { | |
51 | // Default constructor | |
52 | fTracks[0]=fTracks[1]=fTracks[2]=-3141593; | |
53 | } | |
54 | ||
55 | //______________________________________________________________________________ | |
56 | AliClusterTGeo::AliClusterTGeo(UShort_t volId, | |
57 | const Float_t *hit, | |
58 | Float_t x, | |
59 | Float_t sigyz, | |
60 | const Int_t *lab): | |
61 | TObject(), | |
62 | fX(x), | |
63 | fY(hit[0]), | |
64 | fZ(hit[1]), | |
65 | fSigmaY2(hit[2]), | |
66 | fSigmaZ2(hit[3]), | |
67 | fSigmaYZ(sigyz), | |
68 | fVolumeId(volId), | |
69 | fIsMisaligned(kFALSE) | |
70 | { | |
71 | // Constructor | |
72 | if (lab) { | |
73 | fTracks[0] = lab[0]; | |
74 | fTracks[1] = lab[1]; | |
75 | fTracks[2] = lab[2]; | |
76 | } | |
77 | else | |
78 | fTracks[0]=fTracks[1]=fTracks[2]=-3141593; | |
79 | } | |
80 | ||
81 | //______________________________________________________________________________ | |
82 | AliClusterTGeo::AliClusterTGeo(const AliClusterTGeo& cluster): | |
83 | TObject(cluster), | |
84 | fX(cluster.fX), | |
85 | fY(cluster.fY), | |
86 | fZ(cluster.fZ), | |
87 | fSigmaY2(cluster.fSigmaY2), | |
88 | fSigmaZ2(cluster.fSigmaZ2), | |
89 | fSigmaYZ(cluster.fSigmaYZ), | |
90 | fVolumeId(cluster.fVolumeId), | |
91 | fIsMisaligned(cluster.fIsMisaligned) | |
92 | { | |
93 | // Copy constructor | |
94 | fTracks[0] = cluster.fTracks[0]; | |
95 | fTracks[1] = cluster.fTracks[1]; | |
96 | fTracks[2] = cluster.fTracks[2]; | |
97 | } | |
98 | ||
99 | //______________________________________________________________________________ | |
100 | AliClusterTGeo & AliClusterTGeo::operator=(const AliClusterTGeo& cluster) | |
101 | { | |
102 | // Assignment operator | |
103 | ||
104 | if(&cluster == this) return *this; | |
105 | ||
106 | fX = cluster.fX; | |
107 | fY = cluster.fY; | |
108 | fZ = cluster.fZ; | |
109 | fSigmaY2 = cluster.fSigmaY2; | |
110 | fSigmaZ2 = cluster.fSigmaZ2; | |
111 | fSigmaYZ = cluster.fSigmaYZ; | |
112 | fVolumeId = cluster.fVolumeId; | |
113 | fIsMisaligned = cluster.fIsMisaligned; | |
114 | ||
115 | fTracks[0] = cluster.fTracks[0]; | |
116 | fTracks[1] = cluster.fTracks[1]; | |
117 | fTracks[2] = cluster.fTracks[2]; | |
118 | ||
119 | return *this; | |
120 | } | |
121 | ||
122 | //______________________________________________________________________________ | |
123 | Bool_t AliClusterTGeo::GetGlobalXYZ(Float_t xyz[3]) const | |
124 | { | |
125 | // Get the global coordinates of the cluster | |
126 | // All the needed information is taken only | |
127 | // from TGeo. | |
128 | ||
129 | xyz[0] = xyz[1] = xyz[2] = 0; | |
130 | ||
131 | if (!gGeoManager || !gGeoManager->IsClosed()) { | |
132 | AliError("Can't get the global coordinates! gGeoManager doesn't exist or it is still opened!"); | |
133 | return kFALSE; | |
134 | } | |
135 | ||
136 | const TGeoHMatrix *mt = GetTracking2LocalMatrix(); | |
137 | if (!mt) return kFALSE; | |
138 | Double_t txyz[3] = {fX, fY, fZ}; | |
139 | Double_t lxyz[3] = {0, 0, 0}; | |
140 | mt->LocalToMaster(txyz,lxyz); | |
141 | ||
142 | TGeoHMatrix *ml = GetMatrix(); | |
143 | if (!ml) return kFALSE; | |
144 | Double_t gxyz[3] = {0, 0, 0}; | |
145 | ml->LocalToMaster(lxyz,gxyz); | |
146 | xyz[0] = gxyz[0]; xyz[1] = gxyz[1]; xyz[2] = gxyz[2]; | |
147 | return kTRUE; | |
148 | } | |
149 | ||
150 | //______________________________________________________________________________ | |
151 | Bool_t AliClusterTGeo::GetGlobalCov(Float_t cov[6]) const | |
152 | { | |
153 | // Get the global covariance matrix of the cluster coordinates | |
154 | // All the needed information is taken only | |
155 | // from TGeo. | |
156 | for (Int_t i = 0; i < 6; i++) cov[i] = 0; | |
157 | ||
158 | if (!gGeoManager || !gGeoManager->IsClosed()) { | |
159 | AliError("Can't get the global coordinates! gGeoManager doesn't exist or it is still opened!"); | |
160 | return kFALSE; | |
161 | } | |
162 | ||
163 | const TGeoHMatrix *mt = GetTracking2LocalMatrix(); | |
164 | if (!mt) return kFALSE; | |
165 | ||
166 | TGeoHMatrix *ml = GetMatrix(); | |
167 | if (!ml) return kFALSE; | |
168 | ||
169 | TGeoHMatrix m; | |
170 | Double_t tcov[9] = { 0, 0, 0, 0, fSigmaY2, fSigmaYZ, 0, fSigmaYZ, fSigmaZ2 }; | |
171 | m.SetRotation(tcov); | |
172 | m.Multiply(&mt->Inverse()); | |
173 | m.Multiply(&ml->Inverse()); | |
174 | m.MultiplyLeft(mt); | |
175 | m.MultiplyLeft(ml); | |
176 | Double_t *ncov = m.GetRotationMatrix(); | |
177 | cov[0] = ncov[0]; cov[1] = ncov[1]; cov[2] = ncov[2]; | |
178 | cov[3] = ncov[4]; cov[4] = ncov[5]; | |
179 | cov[5] = ncov[8]; | |
180 | ||
181 | return kTRUE; | |
182 | } | |
183 | ||
184 | //______________________________________________________________________________ | |
185 | Bool_t AliClusterTGeo::GetXRefPlane(Float_t &xref) const | |
186 | { | |
187 | // Get the distance between the origin and the ref.plane. | |
188 | // All the needed information is taken only | |
189 | // from TGeo. | |
190 | xref = 0; | |
191 | ||
192 | const TGeoHMatrix *mt = GetTracking2LocalMatrix(); | |
193 | if (!mt) return kFALSE; | |
194 | ||
195 | TGeoHMatrix *ml = GetMatrix(); | |
196 | if (!ml) return kFALSE; | |
197 | ||
198 | TGeoHMatrix m = *mt; | |
199 | m.MultiplyLeft(ml); | |
200 | ||
201 | xref = (m.Inverse()).GetTranslation()[0]; | |
202 | return kTRUE; | |
203 | } | |
204 | ||
205 | //______________________________________________________________________________ | |
206 | Bool_t AliClusterTGeo::Misalign() | |
207 | { | |
208 | // ... | |
209 | // All the needed information is taken only | |
210 | // from TGeo. | |
211 | if (!gGeoManager || !gGeoManager->IsClosed()) { | |
212 | AliError("Can't get the PN entry! gGeoManager doesn't exist or it is still opened!"); | |
213 | return kFALSE; | |
214 | } | |
215 | ||
216 | if (fIsMisaligned) { | |
217 | AliError("The cluster was already misaligned!"); | |
218 | return kFALSE; | |
219 | } | |
220 | ||
221 | const TGeoHMatrix *mt = GetTracking2LocalMatrix(); | |
222 | if (!mt) return kFALSE; | |
223 | ||
224 | TGeoHMatrix *ml = GetMatrix(); | |
225 | if (!ml) return kFALSE; | |
226 | ||
227 | TGeoHMatrix *mlorig = GetMatrix(kTRUE); | |
228 | if (!mlorig) return kFALSE; | |
229 | ||
230 | TGeoHMatrix delta = *mt; | |
231 | delta.MultiplyLeft(ml); | |
232 | delta.MultiplyLeft(&(mlorig->Inverse())); | |
233 | delta.MultiplyLeft(&(mt->Inverse())); | |
234 | ||
235 | Double_t xyzorig[3] = {fX, fY, fZ}; | |
236 | Double_t xyz[3] = {0, 0, 0}; | |
237 | delta.LocalToMaster(xyzorig,xyz); | |
238 | fX = xyz[0]; fY = xyz[1]; fZ = xyz[2]; | |
239 | fIsMisaligned = kTRUE; | |
240 | return kTRUE; | |
241 | } | |
242 | ||
243 | //______________________________________________________________________________ | |
244 | TGeoHMatrix* AliClusterTGeo::GetMatrix(Bool_t original) const | |
245 | { | |
246 | // Get the matrix which transforms from the | |
247 | // local TGeo alignable volume c.s. to the global one. | |
248 | // In case the cluster was already misaligned, get the | |
249 | // ideal matrix from TGeo. The option 'original' | |
250 | // can be used to force the calculation of the ideal | |
251 | // matrix. | |
252 | if (!fIsMisaligned && (original == kFALSE)) { | |
253 | TGeoPNEntry *pne = GetPNEntry(); | |
254 | if (!pne) return NULL; | |
255 | ||
256 | TGeoPhysicalNode *pnode = pne->GetPhysicalNode(); | |
257 | if (pnode) return pnode->GetMatrix(); | |
258 | ||
259 | const char* path = pne->GetTitle(); | |
260 | if (!gGeoManager->cd(path)) { | |
261 | AliError(Form("Volume path %s not valid!",path)); | |
262 | return NULL; | |
263 | } | |
264 | return gGeoManager->GetCurrentMatrix(); | |
265 | } | |
266 | else { | |
267 | const char* symname = AliAlignObj::SymName(fVolumeId); | |
268 | if (!symname) return NULL; | |
269 | ||
270 | static TGeoHMatrix m; | |
271 | if (AliAlignObj::GetOrigGlobalMatrix(symname,m)) | |
272 | return &m; | |
273 | else | |
274 | return NULL; | |
275 | } | |
276 | } | |
277 | ||
278 | //______________________________________________________________________________ | |
279 | const TGeoHMatrix* AliClusterTGeo::GetTracking2LocalMatrix() const | |
280 | { | |
281 | // Get the matrix which is stored with the PN entries in TGeo. | |
282 | // The matrix makes the transformation from the tracking c.s. to | |
283 | // global one. | |
284 | TGeoPNEntry *pne = GetPNEntry(); | |
285 | if (!pne) return NULL; | |
286 | ||
287 | const TGeoHMatrix *m = pne->GetMatrix(); | |
288 | if (!m) | |
289 | AliError(Form("TGeoPNEntry (%s) contains no matrix !",pne->GetName())); | |
290 | ||
291 | return m; | |
292 | } | |
293 | ||
294 | //______________________________________________________________________________ | |
295 | TGeoPNEntry* AliClusterTGeo::GetPNEntry() const | |
296 | { | |
297 | // Get a pointer to the physical node entry | |
298 | // corresponding to the alignable volume to | |
299 | // which the cluster belongs | |
300 | ||
301 | if (!gGeoManager || !gGeoManager->IsClosed()) { | |
302 | AliError("Can't get the PN entry! gGeoManager doesn't exist or it is still opened!"); | |
303 | return NULL; | |
304 | } | |
305 | ||
306 | const char* symname = AliAlignObj::SymName(fVolumeId); | |
307 | if (!symname) return NULL; | |
308 | ||
309 | TGeoPNEntry* pne = gGeoManager->GetAlignableEntry(symname); | |
310 | if (!pne) | |
311 | AliError(Form("The symbolic volume name %s does not correspond to a physical entry!", | |
312 | symname)); | |
313 | return pne; | |
314 | } |