/************************************************************************** * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * * * * Author: The ALICE Off-line Project. * * Contributors are mentioned in the code where appropriate. * * * * Permission to use, copy, modify and distribute this software and its * * documentation strictly for non-commercial purposes is hereby granted * * without fee, provided that the above copyright notice appears in all * * copies and that both the copyright notice and this permission notice * * appear in the supporting documentation. The authors make no claims * * about the suitability of this software for any purpose. It is * * provided "as is" without express or implied warranty. * **************************************************************************/ /* $Id$ */ /** @file AliFMDGeometry.cxx @author Christian Holm Christensen @date Mon Mar 27 12:40:37 2006 @brief Geometry mananger for the FMD */ //____________________________________________________________________ // // Forward Multiplicity Detector based on Silicon wafers. // // This class is a singleton that handles the geometry parameters of // the FMD detectors. // // The actual code is done by various separate classes. Below is // diagram showing the relationship between the various FMD classes // that handles the geometry // // +------------+ // +- | AliFMDRing | // 2 | +------------+ // +----------------+<>--+ | // | AliFMDGeometry | ^ // +----------------+<>--+ V 1..2 // 3 | +----------------+ // +-| AliFMDDetector | // +----------------+ // ^ // | // +-------------+-------------+ // | | | // +---------+ +---------+ +---------+ // | AliFMD1 | | AliFMD2 | | AliFMD3 | // +---------+ +---------+ +---------+ // // // * AliFMDRing // This class contains all stuff needed to do with a ring. It's // used by the AliFMDDetector objects to instantise inner and // outer rings. The AliFMDRing objects are shared by the // AliFMDDetector objects, and owned by the AliFMDv1 object. // // * AliFMD1, AliFMD2, and AliFMD3 // These are specialisation of AliFMDDetector, that contains the // particularities of each of the sub-detector system. It is // envisioned that the classes should also define the support // volumes and material for each of the detectors. // // #include "AliFMDGeometry.h" // ALIFMDGEOMETRY_H #include "AliFMDRing.h" // ALIFMDRING_H #include "AliFMD1.h" // ALIFMD1_H #include "AliFMD2.h" // ALIFMD2_H #include "AliFMD3.h" // ALIFMD2_H #include "AliRecPoint.h" // ALIRECPOINT_H #include "AliLog.h" // ALIRECPOINT_H #include // ROOT_TVector3 // #include // ROOT_TMatrix // #include // ROOT_TParticle #include #include "AliFMDGeometryBuilder.h" // #include #include #include #include static Int_t FindNodeDepth(const char* name, const char* volname); //==================================================================== ClassImp(AliFMDGeometry) #if 0 ; // This is here to keep Emacs for indenting the next line #endif //____________________________________________________________________ AliFMDGeometry* AliFMDGeometry::fgInstance = 0; //____________________________________________________________________ AliFMDGeometry* AliFMDGeometry::Instance() { // Return (newly created) singleton instance if (!fgInstance) fgInstance = new AliFMDGeometry; return fgInstance; } //____________________________________________________________________ AliFMDGeometry::AliFMDGeometry() : AliGeometry("FMD", "Forward multiplicity"), fBuilder(0) { // PROTECTED // Default constructor fUseFMD1 = kTRUE; fUseFMD2 = kTRUE; fUseFMD3 = kTRUE; fDetailed = kTRUE; fUseAssembly = kTRUE; fInner = new AliFMDRing('I'); fOuter = new AliFMDRing('O'); fFMD1 = new AliFMD1(fInner); fFMD2 = new AliFMD2(fInner, fOuter); fFMD3 = new AliFMD3(fInner, fOuter); fIsInitialized = kFALSE; fActive.Reset(-1); } //____________________________________________________________________ AliFMDGeometry::AliFMDGeometry(const AliFMDGeometry& other) : AliGeometry(other), fIsInitialized(other.fIsInitialized), fInner(other.fInner), fOuter(other.fOuter), fFMD1(other.fFMD1), fFMD2(other.fFMD2), fFMD3(other.fFMD3), fUseFMD1(other.fUseFMD1), fUseFMD2(other.fUseFMD2), fUseFMD3(other.fUseFMD3), fActive(other.fActive), fDetailed(other.fDetailed), fUseAssembly(other.fUseAssembly) { // PROTECTED // Copy constructor } //____________________________________________________________________ AliFMDGeometry& AliFMDGeometry::operator=(const AliFMDGeometry& other) { // PROTECTED // Assignment operator fUseFMD1 = other.fUseFMD1; fUseFMD2 = other.fUseFMD2; fUseFMD3 = other.fUseFMD3; fFMD1 = other.fFMD1; fFMD2 = other.fFMD2; fFMD3 = other.fFMD3; fInner = other.fInner; fOuter = other.fOuter; fIsInitialized = other.fIsInitialized; return *this; } //____________________________________________________________________ void AliFMDGeometry::Init() { // Initialize the the singleton if not done so already if (fIsInitialized) return; fInner->Init(); fOuter->Init(); fFMD1->Init(); fFMD2->Init(); fFMD3->Init(); } //____________________________________________________________________ void AliFMDGeometry::InitTransformations() { // Find all local <-> global transforms if (!gGeoManager) { AliError("No TGeoManager defined"); return; } AliDebug(0, "Initialising transforms for FMD geometry"); if (fFMD1) fFMD1->InitTransformations(); if (fFMD2) fFMD2->InitTransformations(); if (fFMD3) fFMD3->InitTransformations(); } //____________________________________________________________________ void AliFMDGeometry::Build() { // Build the geometry if (!fBuilder) fBuilder = new AliFMDGeometryBuilder(fDetailed); fBuilder->SetDetailed(fDetailed); fBuilder->UseAssembly(fUseAssembly); fBuilder->Exec(); } //____________________________________________________________________ void AliFMDGeometry::SetActive(Int_t* active, Int_t n) { // Set active volumes fActive.Set(n); for (Int_t i = 0; i < n; i++) { AliDebug(1, Form("Active vol id # %d: %d", i, active[i])); fActive[i] = active[i]; } } //____________________________________________________________________ void AliFMDGeometry::AddActive(Int_t active) { // Add an active volume Int_t n = fActive.fN; fActive.Set(n+1); fActive[n] = active; } //____________________________________________________________________ Bool_t AliFMDGeometry::IsActive(Int_t vol) const { // Check if a volume is active for (Int_t i = 0; i < fActive.fN; i++) if (fActive[i] == vol) return kTRUE; return kFALSE; } //____________________________________________________________________ AliFMDDetector* AliFMDGeometry::GetDetector(Int_t i) const { // Get the ith detector. i should be one of 1, 2, or 3. If an // invalid value is passed, 0 (NULL) is returned. switch (i) { case 1: return fUseFMD1 ? static_cast(fFMD1) : 0; case 2: return fUseFMD2 ? static_cast(fFMD2) : 0; case 3: return fUseFMD3 ? static_cast(fFMD3) : 0; } return 0; } //____________________________________________________________________ AliFMDRing* AliFMDGeometry::GetRing(Char_t i) const { // Get the ith ring. i should be one of 'I' or 'O' (case // insensitive). If an invalid parameter is passed, 0 (NULL) is // returned. switch (i) { case 'I': case 'i': return fInner; case 'O': case 'o': return fOuter; } return 0; } //____________________________________________________________________ void AliFMDGeometry::Enable(Int_t i) { // Enable the ith detector. i should be one of 1, 2, or 3 switch (i) { case 1: fUseFMD1 = kTRUE; break; case 2: fUseFMD2 = kTRUE; break; case 3: fUseFMD3 = kTRUE; break; } } //____________________________________________________________________ void AliFMDGeometry::Disable(Int_t i) { // Disable the ith detector. i should be one of 1, 2, or 3 switch (i) { case 1: fUseFMD1 = kFALSE; break; case 2: fUseFMD2 = kFALSE; break; case 3: fUseFMD3 = kFALSE; break; } } //____________________________________________________________________ void AliFMDGeometry::Detector2XYZ(UShort_t detector, Char_t ring, UShort_t sector, UShort_t strip, Double_t& x, Double_t& y, Double_t& z) const { // Translate detector coordinates (detector, ring, sector, strip) to // spatial coordinates (x, y, z) in the master reference frame of // ALICE. AliFMDDetector* det = GetDetector(detector); if (!det) { AliWarning(Form("Unknown detector %d", detector)); return; } det->Detector2XYZ(ring, sector, strip, x, y, z); } //____________________________________________________________________ Bool_t AliFMDGeometry::XYZ2Detector(Double_t x, Double_t y, Double_t z, UShort_t& detector, Char_t& ring, UShort_t& sector, UShort_t& strip) const { // Translate spatial coordinates (x,y,z) in the master reference frame of // ALICE to the detector coordinates (detector, ring, sector, // strip). Note, that if this method is to be used in // reconstruction or the like, then the input z-coordinate should be // corrected for the events interactions points z-coordinate, like // geom->XYZ2Detector(x,y,z-ipz,d,r,s,t); AliFMDDetector* det = 0; detector = 0; for (int i = 1; i <= 3; i++) { det = GetDetector(i); if (!det) continue; if (det->XYZ2Detector(x, y, z, ring, sector, strip)) { detector = det->GetId(); return kTRUE; } } return kFALSE; } //____________________________________________________________________ void AliFMDGeometry::GetGlobal(const AliRecPoint* p, TVector3& pos, TMatrixF& /* mat */) const { // Get the global coordinates cooresponding to the reconstructed // point p. The coordiates is returned in the 3-vector pos passed // to this member function. The matrix mat is used for rotations. GetGlobal(p, pos); } //____________________________________________________________________ void AliFMDGeometry::GetGlobal(const AliRecPoint* p, TVector3& pos) const { // Get the global coordinates cooresponding to the reconstructed // point p. The coordiates is returned in the 3-vector pos passed // to this member function. Note, as AliRecPoint only has places for // 3 indicies, it is assumed that the ring hit is an inner ring - // which obviously needn't be the case. This makes the member // function pretty darn useless. // FIXME: Implement this function to work with outer rings too. Double_t x, y, z; TVector3 local; p->GetLocalPosition(local); UShort_t detector = UShort_t(local.X()); UShort_t sector = UShort_t(local.Y()); UShort_t strip = UShort_t(local.Z()); Detector2XYZ(detector, 'I', sector, strip, x, y, z); pos.SetXYZ(x, y, z); } //____________________________________________________________________ Bool_t AliFMDGeometry::Impact(const TParticle* /* particle */) const { // Return true, if the particle will hit the active detector // elements, and false if not. Should be used for fast // simulations. Note, that the function currently return false // always. // FIXME: Implement this function. return kFALSE; } //____________________________________________________________________ void AliFMDGeometry::ExtractGeomInfo() { // Check the volume depth of some nodes, get the active volume // numbers, and so forth. // // TODO: Here, we should actually also get the parameters of the // shapes, like the verticies of the polygon shape that makes up the // silicon sensor, the strip pitch, the ring radii, the z-positions, // and so on - that is, all the geometric information we need for // futher processing, such as simulation, digitization, // reconstruction, etc. Int_t detectorDepth = FindNodeDepth("FMD1_1", "ALIC"); Int_t ringDepth = FindNodeDepth(Form("FMDI_%d", Int_t('I')), "ALIC"); Int_t moduleDepth = FindNodeDepth("FIFV_0", "ALIC"); Int_t sectorDepth = FindNodeDepth("FISE_1", "ALIC"); fActive.Reset(-1); AliDebug(1, Form("Geometry depths:\n" " Sector: %d\n" " Module: %d\n" " Ring: %d\n" " Detector: %d", sectorDepth, moduleDepth, ringDepth, detectorDepth)); if (sectorDepth < 0 && moduleDepth < 0) { fDetailed = kFALSE; fSectorOff = -1; fModuleOff = -1; fRingOff = 0; fDetectorOff = (ringDepth - detectorDepth); TGeoVolume* actiVol = gGeoManager->GetVolume("FIAC"); TGeoVolume* actoVol = gGeoManager->GetVolume("FOAC"); if (actiVol) AddActive(actiVol->GetNumber()); if (actiVol) AddActive(actoVol->GetNumber()); } else if (sectorDepth < 0) { fDetailed = kFALSE; fSectorOff = -1; fModuleOff = 1; fRingOff = (moduleDepth - ringDepth) + 1; fDetectorOff = (moduleDepth - detectorDepth) + 1; TGeoVolume* modiVol = gGeoManager->GetVolume("FIMO"); TGeoVolume* modoVol = gGeoManager->GetVolume("FOMO"); if (modiVol) AddActive(modiVol->GetNumber()); if (modoVol) AddActive(modoVol->GetNumber()); } else { Int_t stripDepth = FindNodeDepth("FIST_1", "ALIC"); fDetailed = kTRUE; fSectorOff = (stripDepth - sectorDepth); fModuleOff = (moduleDepth >= 0 ? (stripDepth - moduleDepth) : -1); fRingOff = (stripDepth - ringDepth); fDetectorOff = (stripDepth - detectorDepth ); TGeoVolume* striVol = gGeoManager->GetVolume("FIST"); TGeoVolume* stroVol = gGeoManager->GetVolume("FOST"); if (striVol) AddActive(striVol->GetNumber()); if (stroVol) AddActive(stroVol->GetNumber()); } AliDebug(1, Form("Geometry offsets:\n" " Sector: %d\n" " Module: %d\n" " Ring: %d\n" " Detector: %d", fSectorOff, fModuleOff, fRingOff, fDetectorOff)); } //____________________________________________________________________ static Int_t CheckNodes(TGeoNode* node, const char* name, Int_t& lvl) { // If there's no node here. if (!node) return -1; // Check if it this one TString sname(name); if (sname == node->GetName()) return lvl; // Check if the node is an immediate daugther TObjArray* nodes = node->GetNodes(); if (!nodes) return -1; // Increase the level, and search immediate sub nodes. lvl++; TGeoNode* found = static_cast(nodes->FindObject(name)); if (found) return lvl; // Check the sub node, if any of their sub-nodes match. for (Int_t i = 0; i < nodes->GetEntries(); i++) { TGeoNode* sub = static_cast(nodes->At(i)); if (!sub) continue; // Recurive check if (CheckNodes(sub, name, lvl) >= 0) return lvl; } // If not found, decrease the level lvl--; return -1; } //____________________________________________________________________ Int_t FindNodeDepth(const char* name, const char* volname) { // Find the depth of a node TGeoVolume* vol = gGeoManager->GetVolume(volname); if (!vol) { std::cerr << "No top volume defined" << std::endl; return -1; } TObjArray* nodes = vol->GetNodes(); if (!nodes) { std::cerr << "No nodes in top volume" << std::endl; return -1; } TIter next(nodes); TGeoNode* node = 0; Int_t lvl = 0; while ((node = static_cast(next()))) if (CheckNodes(node, name, lvl) >= 0) return lvl; return -1; } //____________________________________________________________________ // // EOF //