Newer
Older
//====================================================================
// AIDA Detector description implementation for LCD
//--------------------------------------------------------------------
//
// Author : M.Frank
//
//====================================================================
// Framework include files
#include "DDG4/Geant4SensitiveDetector_inline.h"
#include "DDG4/Factories.h"
#include "DDG4/Geant4StepHandler.h"
#include "DDG4/Geant4Mapping.h"
#include "DD4hep/BitField64.h"
//#include "G4Step.hh"
/*
* DD4hep::Simulation namespace declaration
*/
namespace DD4hep { namespace Simulation {
Markus Frank
committed
/// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
/// Geant4GenericSD<Tracker>
/// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
struct Tracker {};
/// Method for generating hit(s) using the information of G4Step object.
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
template <> bool Geant4GenericSD<Tracker>::buildHits(G4Step* step,G4TouchableHistory* /*hist*/ ) {
StepHandler h(step);
//------------ get the cellID -----------------------------------
Geant4Mapping& mapping = Geant4Mapping::instance();
Geant4StepHandler stepH(step);
const G4VPhysicalVolume* pv = stepH.volume(stepH.pre);
int cellID = 0 ;
Geometry::PlacedVolume place = mapping.placement(pv);
if ( place.isValid() ) {
if ( place.volume().isSensitive() ) {
// G4cout << "----------- Geant4GenericSD<Tracker>::buildHits - get volumeID from " << place.toString() << std::endl ;
Geometry::VolumeManager vm = mapping.lcdd().volumeManager();
Geometry::VolumeManager::VolumeID cell_id = vm.lookupID( place );
// const Geometry::PlacedVolume::VolIDs& ids = place.volIDs();
// printf(" Found Sensitive TGeoNode:%s CellID: %llx #VolIDs: %d --- at level: %d \n", place.name(), cell_id , ids.size() , i );
// for( Geometry::PlacedVolume::VolIDs::const_iterator it = ids.begin() ; it != ids.end() ; ++it ){
// G4cout << "--- " << it->first << " -- " << it->second << std::endl ;
// }
Geometry::Volume vol = place.volume();
Geometry::SensitiveDetector sd = vol.sensitiveDetector();
Geometry::Readout ro = sd.readout();
Geometry::IDDescriptor iddesc = ro.idSpec();
//----- use a BitField64 object to store the cellID in the Linear collider convention
BitField64 bf( iddesc.toString() ) ;
#define test_cellID 0
#if test_cellID
for( unsigned i=0, N=bf.size() ;i<N;++i){
BitFieldValue& v = bf[i] ;
long val = iddesc.field( v.name() ).decode( cell_id ) ;
if( v.isSigned() && ( val & ( 1LL << ( v.width() - 1 ) ) ) != 0 ) { // negative value
val -= ( 1LL << v.width() );
}
v = val ;
// this does not work as the IDDescriptor does not handle signed (negative) values correctly
// b[i] = iddesc.field( b[i].name() ).decode( cell_id ) ;
}
G4cout << "--- IDDescriptor: " << iddesc.toString()
<< std::endl ;
BitField64 testBF( iddesc.toString() ) ;
testBF.setValue( cell_id ) ;
G4cout << "--- testing BitField64 testBF \n " << testBF
<< " \n bf from IDDescriptor : " << bf << std::endl ;
assert( testBF.getValue() == bf.getValue() ) ;
#else
bf.setValue( cell_id ) ; // this sets the unused high bits to 0 !
#endif
cellID = bf.lowWord() ;
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
} else {
G4cerr << "**ERROR** Geant4GenericSD<Tracker>::buildHits - called for insensitive volume: "
<< place.toString()
<< std::endl ;
}
} else{
G4cerr << "----------- Geant4GenericSD<Tracker>::buildHits - invalid Volume found: " << std::endl ;
}
Position prePos = h.prePos();
Position postPos = h.postPos();
Position direction = postPos - prePos;
Position position = mean_direction(prePos,postPos);
double hit_len = direction.R();
if (hit_len > 0) {
double new_len = mean_length(h.preMom(),h.postMom())/hit_len;
direction *= new_len/hit_len;
}
// G4cout << "----------- Geant4GenericSD<Tracker>::buildHits : position : " << prePos << G4endl ;
Geant4TrackerHit* hit =
new Geant4TrackerHit(h.track->GetTrackID(),
h.track->GetDefinition()->GetPDGEncoding(),
step->GetTotalEnergyDeposit(),
h.track->GetGlobalTime());
HitContribution contrib = Geant4Hit::extractContribution(step);
// get the copy number of the parent volume -
// we need a more generic way of finding the volume that has the right copy number assigned...
// otherwise we couple detector construction sensitive detector !!
// G4StepPoint* preStepPoint = step->GetPreStepPoint();
// G4TouchableHistory* theTouchable = (G4TouchableHistory*)( preStepPoint->GetTouchable() );
// G4int copyNo = theTouchable->GetVolume()->GetCopyNo();
// G4int motherCopyNo = theTouchable->GetVolume(1)->GetCopyNo();
hit->cellID = cellID ;
hit->energyDeposit = contrib.deposit ;
hit->position = position;
hit->momentum = direction;
hit->length = hit_len;
collection(0)->insert(hit);
return hit != 0;
}
typedef Geant4GenericSD<Tracker> Geant4Tracker;
}} // End namespace DD4hep::Simulation