00001 // 00002 // ******************************************************************** 00003 // * License and Disclaimer * 00004 // * * 00005 // * The Geant4 software is copyright of the Copyright Holders of * 00006 // * the Geant4 Collaboration. It is provided under the terms and * 00007 // * conditions of the Geant4 Software License, included in the file * 00008 // * LICENSE and available at http://cern.ch/geant4/license . These * 00009 // * include a list of copyright holders. * 00010 // * * 00011 // * Neither the authors of this software system, nor their employing * 00012 // * institutes,nor the agencies providing financial support for this * 00013 // * work make any representation or warranty, express or implied, * 00014 // * regarding this software system or assume any liability for its * 00015 // * use. Please see the license in the file LICENSE and URL above * 00016 // * for the full disclaimer and the limitation of liability. * 00017 // * * 00018 // * This code implementation is the result of the scientific and * 00019 // * technical work of the GEANT4 collaboration. * 00020 // * By using, copying, modifying or distributing the software (or * 00021 // * any work based on the software) you agree to acknowledge its * 00022 // * use in resulting scientific publications, and indicate your * 00023 // * acceptance of all terms of the Geant4 Software license. * 00024 // ******************************************************************** 00025 // 00026 // 00027 // $Id$ 00028 // 00029 //--------------------------------------------------------------- 00030 // 00031 // G4FastTrack.cc 00032 // 00033 // Description: 00034 // Keeps the current track information and special features 00035 // for Parameterised Simulation Models. 00036 // 00037 // History: 00038 // Oct 97: Verderi && MoraDeFreitas - First Implementation. 00039 // 00040 //--------------------------------------------------------------- 00041 00042 #include "G4ios.hh" 00043 #include "G4FastTrack.hh" 00044 #include "G4TransportationManager.hh" 00045 #include "G4TouchableHistoryHandle.hh" 00046 00047 // ----------- 00048 // Constructor 00049 // ----------- 00050 // 00051 G4FastTrack::G4FastTrack(G4Envelope *anEnvelope, 00052 G4bool IsUnique) : 00053 fAffineTransformationDefined(false), fEnvelope(anEnvelope), 00054 fIsUnique(IsUnique), fEnvelopeLogicalVolume(0), fEnvelopePhysicalVolume(0), 00055 fEnvelopeSolid(0) 00056 {} 00057 00058 // ----------- 00059 // Destructor: 00060 // ----------- 00061 G4FastTrack::~G4FastTrack() 00062 {} 00063 00064 //------------------------------------------------------------ 00065 // The parameterised simulation manager uses the SetCurrentTrack 00066 // method to setup the current G4FastTrack object 00067 //------------------------------------------------------------ 00068 void G4FastTrack::SetCurrentTrack(const G4Track& track, 00069 const G4Navigator* theNavigator) 00070 { 00071 00072 // -- Register track pointer (used everywhere): 00073 fTrack = &track; 00074 00075 //----------------------------------------------------- 00076 // First time the track enters the volume or if the 00077 // Logical Volume was placed n-Times in the geometry : 00078 // 00079 // Records the Rotation+Translation for the Envelope ! 00080 // When the particle is inside or on the boundary, the 00081 // NavigationHistory IS UP TO DATE. 00082 //------------------------------------------------------ 00083 if (!fAffineTransformationDefined || !fIsUnique) FRecordsAffineTransformation(theNavigator); 00084 00085 //------------------------------------------- 00086 // Records local position/momentum/direction 00087 // of the Track. 00088 // They are accessible to the user through a 00089 // set of Get functions and should be useful 00090 // to decide to trigger or not. 00091 //------------------------------------------- 00092 // -- local position: 00093 fLocalTrackPosition = fAffineTransformation.TransformPoint(fTrack->GetPosition()); 00094 // -- local momentum: 00095 fLocalTrackMomentum = fAffineTransformation.TransformAxis(fTrack->GetMomentum()); 00096 // -- local direction: 00097 fLocalTrackDirection = fLocalTrackMomentum.unit(); 00098 // -- local polarization: 00099 fLocalTrackPolarization = fAffineTransformation.TransformAxis(fTrack->GetPolarization()); 00100 } 00101 00102 //------------------------------------ 00103 // 00104 // 3D transformation of the envelope 00105 // This is Done only one time. 00106 // 00107 //------------------------------------ 00108 void 00109 G4FastTrack::FRecordsAffineTransformation(const G4Navigator* theNavigator) 00110 { 00111 00112 //-------------------------------------------------------- 00113 // Get the touchable history which represents the current 00114 // volume hierachy the particle is in. 00115 // Note that TouchableHistory allocated by the Navigator 00116 // must be deleted by G4FastTrack. 00117 //-------------------------------------------------------- 00118 const G4Navigator* NavigatorToUse; 00119 if(theNavigator != 0 ) NavigatorToUse = theNavigator; 00120 else NavigatorToUse = G4TransportationManager::GetTransportationManager()->GetNavigatorForTracking(); 00121 00122 G4TouchableHistoryHandle history = NavigatorToUse->CreateTouchableHistoryHandle(); 00123 00124 //----------------------------------------------------- 00125 // Run accross the hierarchy to find the physical volume 00126 // associated with the envelope 00127 //----------------------------------------------------- 00128 G4int depth = history->GetHistory()->GetDepth(); 00129 G4int idepth, Done = 0; 00130 for (idepth = 0; idepth <= depth; idepth++) 00131 { 00132 G4VPhysicalVolume* currPV = history->GetHistory()->GetVolume(idepth); 00133 G4LogicalVolume* currLV = currPV->GetLogicalVolume(); 00134 if ( (currLV->GetRegion() == fEnvelope) && (currLV->IsRootRegion()) ) 00135 { 00136 fEnvelopePhysicalVolume = currPV; 00137 fEnvelopeLogicalVolume = currLV; 00138 fEnvelopeSolid = currLV->GetSolid(); 00139 Done = 1; 00140 break; 00141 } 00142 } 00143 //--------------------------------------------- 00144 //-- Verification: should be removed in future: 00145 //--------------------------------------------- 00146 if ( !Done ) 00147 { 00148 G4ExceptionDescription ed; 00149 ed << "Can't find transformation for `" << fEnvelopePhysicalVolume->GetName() << "'" << G4endl; 00150 G4Exception("G4FastTrack::FRecordsAffineTransformation()", 00151 "FastSim011", 00152 JustWarning, ed); 00153 } 00154 else 00155 { 00156 //------------------------------------------------------- 00157 // Records the transformation and inverse transformation: 00158 //------------------------------------------------------- 00159 fAffineTransformation = history->GetHistory()->GetTransform(idepth); 00160 fInverseAffineTransformation = fAffineTransformation.Inverse(); 00161 00162 fAffineTransformationDefined = true; 00163 } 00164 }