1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 //____________________________________________________________________
20 // Forward Multiplicity Detector based on Silicon wafers.
22 // This class is a singleton that handles the geometry parameters of
25 // The actual code is done by various separate classes. Below is
26 // diagram showing the relationship between the various FMD classes
27 // that handles the geometry
32 // +----------------+<>--+ |
33 // | AliFMDGeometry | ^
34 // +----------------+<>--+ V 1..2
35 // 3 | +----------------+
36 // +-| AliFMDDetector |
40 // +-------------+-------------+
42 // +---------+ +---------+ +---------+
43 // | AliFMD1 | | AliFMD2 | | AliFMD3 |
44 // +---------+ +---------+ +---------+
48 // This class contains all stuff needed to do with a ring. It's
49 // used by the AliFMDDetector objects to instantise inner and
50 // outer rings. The AliFMDRing objects are shared by the
51 // AliFMDDetector objects, and owned by the AliFMDv1 object.
53 // * AliFMD1, AliFMD2, and AliFMD3
54 // These are specialisation of AliFMDDetector, that contains the
55 // particularities of each of the sub-detector system. It is
56 // envisioned that the classes should also define the support
57 // volumes and material for each of the detectors.
60 #include "AliFMDGeometry.h" // ALIFMDGEOMETRY_H
61 #include "AliFMDRing.h" // ALIFMDRING_H
62 #include "AliFMD1.h" // ALIFMD1_H
63 #include "AliFMD2.h" // ALIFMD2_H
64 #include "AliFMD3.h" // ALIFMD2_H
65 #include "AliRecPoint.h" // ALIRECPOINT_H
66 #include "AliLog.h" // ALIRECPOINT_H
67 #include <TVector3.h> // ROOT_TVector3
68 #include <TMatrix.h> // ROOT_TMatrix
69 #include <TParticle.h> // ROOT_TParticle
70 #include <Riostream.h>
71 #include "AliFMDGeometryBuilder.h"
73 #include <TGeoManager.h>
74 #include <TGeoVolume.h>
76 static Int_t FindNodeDepth(const char* name, const char* volname);
79 //====================================================================
80 ClassImp(AliFMDGeometry)
82 ; // This is here to keep Emacs for indenting the next line
85 //____________________________________________________________________
86 AliFMDGeometry* AliFMDGeometry::fgInstance = 0;
88 //____________________________________________________________________
90 AliFMDGeometry::Instance()
92 // Return (newly created) singleton instance
93 if (!fgInstance) fgInstance = new AliFMDGeometry;
97 //____________________________________________________________________
98 AliFMDGeometry::AliFMDGeometry()
99 : AliGeometry("FMD", "Forward multiplicity"),
103 // Default constructor
108 fUseAssembly = kTRUE;
109 fInner = new AliFMDRing('I');
110 fOuter = new AliFMDRing('O');
111 fFMD1 = new AliFMD1(fInner);
112 fFMD2 = new AliFMD2(fInner, fOuter);
113 fFMD3 = new AliFMD3(fInner, fOuter);
114 fIsInitialized = kFALSE;
118 //____________________________________________________________________
119 AliFMDGeometry::AliFMDGeometry(const AliFMDGeometry& other)
120 : AliGeometry(other),
121 fIsInitialized(other.fIsInitialized),
122 fInner(other.fInner),
123 fOuter(other.fOuter),
127 fUseFMD1(other.fUseFMD1),
128 fUseFMD2(other.fUseFMD2),
129 fUseFMD3(other.fUseFMD3),
130 fActive(other.fActive),
131 fDetailed(other.fDetailed),
132 fUseAssembly(other.fUseAssembly)
140 //____________________________________________________________________
142 AliFMDGeometry::operator=(const AliFMDGeometry& other)
145 // Assignment operator
146 fUseFMD1 = other.fUseFMD1;
147 fUseFMD2 = other.fUseFMD2;
148 fUseFMD3 = other.fUseFMD3;
152 fInner = other.fInner;
153 fOuter = other.fOuter;
154 fIsInitialized = other.fIsInitialized;
158 //____________________________________________________________________
160 AliFMDGeometry::Init()
162 // Initialize the the singleton if not done so already
163 if (fIsInitialized) return;
171 //____________________________________________________________________
173 AliFMDGeometry::InitTransformations()
176 AliError("No TGeoManager defined");
179 AliDebug(0, "Initialising transforms for FMD geometry");
180 if (fFMD1) fFMD1->InitTransformations();
181 if (fFMD2) fFMD2->InitTransformations();
182 if (fFMD3) fFMD3->InitTransformations();
185 //____________________________________________________________________
187 AliFMDGeometry::Build()
189 if (!fBuilder) fBuilder = new AliFMDGeometryBuilder(fDetailed);
190 fBuilder->SetDetailed(fDetailed);
191 fBuilder->UseAssembly(fUseAssembly);
195 //____________________________________________________________________
197 AliFMDGeometry::SetActive(Int_t* active, Int_t n)
200 for (Int_t i = 0; i < n; i++) {
201 AliDebug(1, Form("Active vol id # %d: %d", i, active[i]));
202 fActive[i] = active[i];
206 //____________________________________________________________________
208 AliFMDGeometry::AddActive(Int_t active)
210 Int_t n = fActive.fN;
215 //____________________________________________________________________
217 AliFMDGeometry::IsActive(Int_t vol) const
219 for (Int_t i = 0; i < fActive.fN; i++)
220 if (fActive[i] == vol) return kTRUE;
224 //____________________________________________________________________
226 AliFMDGeometry::GetDetector(Int_t i) const
228 // Get the ith detector. i should be one of 1, 2, or 3. If an
229 // invalid value is passed, 0 (NULL) is returned.
231 case 1: return fUseFMD1 ? static_cast<AliFMDDetector*>(fFMD1) : 0;
232 case 2: return fUseFMD2 ? static_cast<AliFMDDetector*>(fFMD2) : 0;
233 case 3: return fUseFMD3 ? static_cast<AliFMDDetector*>(fFMD3) : 0;
238 //____________________________________________________________________
240 AliFMDGeometry::GetRing(Char_t i) const
242 // Get the ith ring. i should be one of 'I' or 'O' (case
243 // insensitive). If an invalid parameter is passed, 0 (NULL) is
247 case 'i': return fInner;
249 case 'o': return fOuter;
254 //____________________________________________________________________
256 AliFMDGeometry::Enable(Int_t i)
258 // Enable the ith detector. i should be one of 1, 2, or 3
260 case 1: fUseFMD1 = kTRUE; break;
261 case 2: fUseFMD2 = kTRUE; break;
262 case 3: fUseFMD3 = kTRUE; break;
266 //____________________________________________________________________
268 AliFMDGeometry::Disable(Int_t i)
270 // Disable the ith detector. i should be one of 1, 2, or 3
272 case 1: fUseFMD1 = kFALSE; break;
273 case 2: fUseFMD2 = kFALSE; break;
274 case 3: fUseFMD3 = kFALSE; break;
278 //____________________________________________________________________
280 AliFMDGeometry::Detector2XYZ(UShort_t detector,
288 // Translate detector coordinates (detector, ring, sector, strip) to
289 // spatial coordinates (x, y, z) in the master reference frame of
291 AliFMDDetector* det = GetDetector(detector);
293 AliWarning(Form("Unknown detector %d", detector));
296 det->Detector2XYZ(ring, sector, strip, x, y, z);
299 //____________________________________________________________________
301 AliFMDGeometry::XYZ2Detector(Double_t x,
307 UShort_t& strip) const
309 // Translate spatial coordinates (x,y,z) in the master reference frame of
310 // ALICE to the detector coordinates (detector, ring, sector,
311 // strip). Note, that if this method is to be used in
312 // reconstruction or the like, then the input z-coordinate should be
313 // corrected for the events interactions points z-coordinate, like
314 // geom->XYZ2Detector(x,y,z-ipz,d,r,s,t);
315 AliFMDDetector* det = 0;
317 for (int i = 1; i <= 3; i++) {
318 det = GetDetector(i);
320 if (det->XYZ2Detector(x, y, z, ring, sector, strip)) {
321 detector = det->GetId();
329 //____________________________________________________________________
331 AliFMDGeometry::GetGlobal(const AliRecPoint* p,
333 TMatrixF& /* mat */) const
335 // Get the global coordinates cooresponding to the reconstructed
336 // point p. The coordiates is returned in the 3-vector pos passed
337 // to this member function. The matrix mat is used for rotations.
341 //____________________________________________________________________
343 AliFMDGeometry::GetGlobal(const AliRecPoint* p, TVector3& pos) const
345 // Get the global coordinates cooresponding to the reconstructed
346 // point p. The coordiates is returned in the 3-vector pos passed
347 // to this member function. Note, as AliRecPoint only has places for
348 // 3 indicies, it is assumed that the ring hit is an inner ring -
349 // which obviously needn't be the case. This makes the member
350 // function pretty darn useless.
351 // FIXME: Implement this function to work with outer rings too.
354 p->GetLocalPosition(local);
355 UShort_t detector = UShort_t(local.X());
356 UShort_t sector = UShort_t(local.Y());
357 UShort_t strip = UShort_t(local.Z());
358 Detector2XYZ(detector, 'I', sector, strip, x, y, z);
362 //____________________________________________________________________
364 AliFMDGeometry::Impact(const TParticle* /* particle */) const
366 // Return true, if the particle will hit the active detector
367 // elements, and false if not. Should be used for fast
368 // simulations. Note, that the function currently return false
370 // FIXME: Implement this function.
374 //____________________________________________________________________
376 AliFMDGeometry::ExtractGeomInfo()
378 // Check the volume depth of some nodes, get the active volume
379 // numbers, and so forth.
381 // TODO: Here, we should actually also get the parameters of the
382 // shapes, like the verticies of the polygon shape that makes up the
383 // silicon sensor, the strip pitch, the ring radii, the z-positions,
384 // and so on - that is, all the geometric information we need for
385 // futher processing, such as simulation, digitization,
386 // reconstruction, etc.
387 Int_t detectorDepth = FindNodeDepth("FMD1_1", "ALIC");
388 Int_t ringDepth = FindNodeDepth(Form("FMDI_%d", Int_t('I')), "ALIC");
389 Int_t moduleDepth = FindNodeDepth("FIFV_0", "ALIC");
390 Int_t sectorDepth = FindNodeDepth("FISE_1", "ALIC");
392 AliDebug(1, Form("Geometry depths:\n"
397 sectorDepth, moduleDepth, ringDepth, detectorDepth));
398 if (sectorDepth < 0 && moduleDepth < 0) {
403 fDetectorOff = (ringDepth - detectorDepth);
404 TGeoVolume* actiVol = gGeoManager->GetVolume("FIAC");
405 TGeoVolume* actoVol = gGeoManager->GetVolume("FOAC");
406 if (actiVol) AddActive(actiVol->GetNumber());
407 if (actiVol) AddActive(actoVol->GetNumber());
409 else if (sectorDepth < 0) {
413 fRingOff = (moduleDepth - ringDepth) + 1;
414 fDetectorOff = (moduleDepth - detectorDepth) + 1;
415 TGeoVolume* modiVol = gGeoManager->GetVolume("FIMO");
416 TGeoVolume* modoVol = gGeoManager->GetVolume("FOMO");
417 if (modiVol) AddActive(modiVol->GetNumber());
418 if (modoVol) AddActive(modoVol->GetNumber());
421 Int_t stripDepth = FindNodeDepth("FIST_1", "ALIC");
423 fSectorOff = (stripDepth - sectorDepth);
424 fModuleOff = (moduleDepth >= 0 ? (stripDepth - moduleDepth) : -1);
425 fRingOff = (stripDepth - ringDepth);
426 fDetectorOff = (stripDepth - detectorDepth );
427 TGeoVolume* striVol = gGeoManager->GetVolume("FIST");
428 TGeoVolume* stroVol = gGeoManager->GetVolume("FOST");
429 if (striVol) AddActive(striVol->GetNumber());
430 if (stroVol) AddActive(stroVol->GetNumber());
432 AliDebug(1, Form("Geometry offsets:\n"
437 fSectorOff, fModuleOff, fRingOff, fDetectorOff));
441 //____________________________________________________________________
443 CheckNodes(TGeoNode* node, const char* name, Int_t& lvl)
445 // If there's no node here.
446 if (!node) return -1;
447 // Check if it this one
449 if (sname == node->GetName()) return lvl;
451 // Check if the node is an immediate daugther
452 TObjArray* nodes = node->GetNodes();
453 if (!nodes) return -1;
454 // Increase the level, and search immediate sub nodes.
456 TGeoNode* found = static_cast<TGeoNode*>(nodes->FindObject(name));
457 if (found) return lvl;
459 // Check the sub node, if any of their sub-nodes match.
460 for (Int_t i = 0; i < nodes->GetEntries(); i++) {
461 TGeoNode* sub = static_cast<TGeoNode*>(nodes->At(i));
464 if (CheckNodes(sub, name, lvl) >= 0) return lvl;
466 // If not found, decrease the level
470 //____________________________________________________________________
472 FindNodeDepth(const char* name, const char* volname)
474 TGeoVolume* vol = gGeoManager->GetVolume(volname);
476 std::cerr << "No top volume defined" << std::endl;
479 TObjArray* nodes = vol->GetNodes();
481 std::cerr << "No nodes in top volume" << std::endl;
487 while ((node = static_cast<TGeoNode*>(next())))
488 if (CheckNodes(node, name, lvl) >= 0) return lvl;
492 //____________________________________________________________________