forked from celeritas-project/celeritas
-
Notifications
You must be signed in to change notification settings - Fork 0
/
GeantImporter.cc
1112 lines (987 loc) · 38.1 KB
/
GeantImporter.cc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
//----------------------------------*-C++-*----------------------------------//
// Copyright 2022-2024 UT-Battelle, LLC, and other Celeritas developers.
// See the top-level COPYRIGHT file for details.
// SPDX-License-Identifier: (Apache-2.0 OR MIT)
//---------------------------------------------------------------------------//
//! \file celeritas/ext/GeantImporter.cc
//---------------------------------------------------------------------------//
#include "GeantImporter.hh"
#include <algorithm>
#include <functional>
#include <map>
#include <memory>
#include <string>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#include <CLHEP/Units/SystemOfUnits.h>
#include <G4Element.hh>
#include <G4ElementTable.hh>
#include <G4ElementVector.hh>
#include <G4EmParameters.hh>
#include <G4GammaGeneralProcess.hh>
#include <G4LogicalVolumeStore.hh>
#include <G4Material.hh>
#include <G4MaterialCutsCouple.hh>
#include <G4MscStepLimitType.hh>
#include <G4Navigator.hh>
#include <G4NucleiProperties.hh>
#include <G4ParticleDefinition.hh>
#include <G4ParticleTable.hh>
#include <G4ProcessManager.hh>
#include <G4ProcessType.hh>
#include <G4ProcessVector.hh>
#include <G4ProductionCuts.hh>
#include <G4ProductionCutsTable.hh>
#include <G4PropagatorInField.hh>
#include <G4RToEConvForElectron.hh>
#include <G4RToEConvForGamma.hh>
#include <G4RToEConvForPositron.hh>
#include <G4RToEConvForProton.hh>
#include <G4String.hh>
#include <G4Transportation.hh>
#include <G4TransportationManager.hh>
#include <G4Types.hh>
#include <G4VEnergyLossProcess.hh>
#include <G4VMultipleScattering.hh>
#include <G4VPhysicalVolume.hh>
#include <G4VProcess.hh>
#include <G4VRangeToEnergyConverter.hh>
#include <G4Version.hh>
#include "celeritas_config.h"
#include "corecel/Assert.hh"
#include "corecel/cont/Range.hh"
#include "corecel/io/Logger.hh"
#include "corecel/io/ScopedTimeLog.hh"
#include "corecel/math/SoftEqual.hh"
#include "corecel/sys/ScopedMem.hh"
#include "corecel/sys/ScopedProfiling.hh"
#include "corecel/sys/TypeDemangler.hh"
#include "geocel/GeantGeoUtils.hh"
#include "geocel/ScopedGeantExceptionHandler.hh"
#include "geocel/g4/VisitGeantVolumes.hh"
#include "celeritas/io/AtomicRelaxationReader.hh"
#include "celeritas/io/ImportData.hh"
#include "celeritas/io/LivermorePEReader.hh"
#include "celeritas/io/SeltzerBergerReader.hh"
#include "celeritas/phys/PDGNumber.hh"
#include "GeantSetup.hh"
#include "detail/AllElementReader.hh"
#include "detail/GeantProcessImporter.hh"
inline constexpr double mev_scale = 1 / CLHEP::MeV;
namespace celeritas
{
namespace
{
//---------------------------------------------------------------------------//
// HELPER FUNCTIONS
//---------------------------------------------------------------------------//
decltype(auto) em_basic_particles()
{
static std::unordered_set<PDGNumber> const particles
= {pdg::electron(), pdg::positron(), pdg::gamma()};
return particles;
}
//---------------------------------------------------------------------------//
decltype(auto) em_ex_particles()
{
static std::unordered_set<PDGNumber> const particles
= {pdg::mu_minus(), pdg::mu_plus()};
return particles;
}
//---------------------------------------------------------------------------//
//! Filter for desired particle types
struct ParticleFilter
{
using DataSelection = celeritas::GeantImporter::DataSelection;
DataSelection::Flags which;
bool operator()(PDGNumber pdgnum)
{
if (!pdgnum)
{
return (which & DataSelection::dummy);
}
else if (em_basic_particles().count(pdgnum))
{
return (which & DataSelection::em_basic);
}
else if (em_ex_particles().count(pdgnum))
{
return (which & DataSelection::em_ex);
}
else
{
// XXX assume non-dummy and non-em are hadronic?
return (which & DataSelection::hadron);
}
}
};
//---------------------------------------------------------------------------//
//! Filter for desired processes
struct ProcessFilter
{
using DataSelection = celeritas::GeantImporter::DataSelection;
DataSelection::Flags which;
bool operator()(G4ProcessType pt)
{
switch (pt)
{
case G4ProcessType::fElectromagnetic:
return (which & DataSelection::em);
case G4ProcessType::fHadronic:
return (which & DataSelection::hadron);
default:
return false;
}
}
};
//---------------------------------------------------------------------------//
//! Retrieve and store optical material properties, if present.
struct MatPropGetter
{
using MPT = G4MaterialPropertiesTable;
MPT const& mpt;
void scalar(double* dst, char const* name, ImportUnits q)
{
if (!mpt.ConstPropertyExists(name))
{
return;
}
*dst = mpt.GetConstProperty(name) * native_value_from_clhep(q);
}
void scalar(double* dst, std::string name, int comp, ImportUnits q)
{
// Geant4 10.6 and earlier require a const char* argument
name += std::to_string(comp);
this->scalar(dst, name.c_str(), q);
}
void
vector(ImportPhysicsVector* dst, std::string const& name, ImportUnits q)
{
// Geant4@10.7: G4MaterialPropertiesTable.GetProperty is not const
// and <=10.6 require const char*
auto const* g4vector = const_cast<MPT&>(mpt).GetProperty(name.c_str());
if (!g4vector)
{
return;
}
CELER_ASSERT(g4vector->GetType()
== G4PhysicsVectorType::T_G4PhysicsFreeVector);
double const y_scale = native_value_from_clhep(q);
dst->vector_type = ImportPhysicsVectorType::free;
dst->x.resize(g4vector->GetVectorLength());
dst->y.resize(dst->x.size());
for (auto i : range(dst->x.size()))
{
dst->x[i] = g4vector->Energy(i);
dst->y[i] = (*g4vector)[i] * y_scale;
}
}
};
//---------------------------------------------------------------------------//
//! Map particles defined in \c G4MaterialConstPropertyIndex .
auto& optical_particles_map()
{
static std::unordered_map<std::string, PDGNumber> const map
= {{"PROTON", pdg::proton()},
{"DEUTERON", pdg::deuteron()},
{"TRITON", pdg::triton()},
{"ALPHA", pdg::alpha()},
{"ION", pdg::ion()},
{"ELECTRON", pdg::electron()}};
return map;
}
//---------------------------------------------------------------------------//
/*!
* Populate an \c ImportScintComponent .
* To retrieve a material-only component simply do not use particle name.
*/
std::vector<ImportScintComponent>
fill_vec_import_scint_comp(MatPropGetter& get_property,
std::string particle_name = "")
{
CELER_EXPECT(particle_name.empty()
|| optical_particles_map().count(particle_name));
std::vector<ImportScintComponent> components;
for (int comp_idx : range(1, 4))
{
ImportScintComponent comp;
get_property.scalar(&comp.yield_per_energy,
particle_name + "SCINTILLATIONYIELD",
comp_idx,
ImportUnits::inv_mev);
// Custom-defined properties not available in G4MaterialPropertyIndex
get_property.scalar(&comp.lambda_mean,
particle_name + "SCINTILLATIONLAMBDAMEAN",
comp_idx,
ImportUnits::len);
get_property.scalar(&comp.lambda_sigma,
particle_name + "SCINTILLATIONLAMBDASIGMA",
comp_idx,
ImportUnits::len);
// Rise time is not defined for particle type in Geant4
get_property.scalar(&comp.rise_time,
particle_name + "SCINTILLATIONRISETIME",
comp_idx,
ImportUnits::time);
get_property.scalar(&comp.fall_time,
particle_name + "SCINTILLATIONTIMECONSTANT",
comp_idx,
ImportUnits::time);
if (comp)
{
components.push_back(std::move(comp));
}
}
return components;
}
//---------------------------------------------------------------------------//
/*!
* Safely switch from G4State [G4Material.hh] to ImportMaterialState.
*/
ImportMaterialState to_material_state(G4State const& g4_material_state)
{
switch (g4_material_state)
{
case G4State::kStateUndefined:
return ImportMaterialState::other;
case G4State::kStateSolid:
return ImportMaterialState::solid;
case G4State::kStateLiquid:
return ImportMaterialState::liquid;
case G4State::kStateGas:
return ImportMaterialState::gas;
}
CELER_ASSERT_UNREACHABLE();
}
//---------------------------------------------------------------------------//
/*!
* Safely switch from G4ProductionCutsIndex [G4ProductionCuts.hh] to the
* particle's pdg encoding.
*/
PDGNumber to_pdg(G4ProductionCutsIndex const& index)
{
switch (index)
{
case idxG4GammaCut:
return pdg::gamma();
case idxG4ElectronCut:
return pdg::electron();
case idxG4PositronCut:
return pdg::positron();
case idxG4ProtonCut:
return pdg::proton();
case NumberOfG4CutIndex:
CELER_ASSERT_UNREACHABLE();
}
CELER_ASSERT_UNREACHABLE();
}
//---------------------------------------------------------------------------//
/*!
* Safely switch from G4MscStepLimitType [G4MscStepLimitType.hh] to
* MscStepLimitAlgorithm.
*/
MscStepLimitAlgorithm
to_msc_step_algorithm(G4MscStepLimitType const& msc_step_algorithm)
{
switch (msc_step_algorithm)
{
case G4MscStepLimitType::fMinimal:
return MscStepLimitAlgorithm::minimal;
case G4MscStepLimitType::fUseSafety:
return MscStepLimitAlgorithm::safety;
case G4MscStepLimitType::fUseSafetyPlus:
return MscStepLimitAlgorithm::safety_plus;
case G4MscStepLimitType::fUseDistanceToBoundary:
return MscStepLimitAlgorithm::distance_to_boundary;
}
CELER_ASSERT_UNREACHABLE();
}
//---------------------------------------------------------------------------//
/*!
* Return a populated \c ImportParticle vector.
*/
std::vector<ImportParticle>
import_particles(GeantImporter::DataSelection::Flags particle_flags)
{
G4ParticleTable::G4PTblDicIterator& particle_iterator
= *(G4ParticleTable::GetParticleTable()->GetIterator());
particle_iterator.reset();
std::vector<ImportParticle> particles;
double const time_scale = native_value_from_clhep(ImportUnits::time);
ParticleFilter include_particle{particle_flags};
while (particle_iterator())
{
G4ParticleDefinition const& g4_particle_def
= *(particle_iterator.value());
PDGNumber pdg{g4_particle_def.GetPDGEncoding()};
if (!include_particle(pdg))
{
continue;
}
ImportParticle particle;
particle.name = g4_particle_def.GetParticleName();
particle.pdg = pdg.unchecked_get();
particle.mass = g4_particle_def.GetPDGMass();
particle.charge = g4_particle_def.GetPDGCharge();
particle.spin = g4_particle_def.GetPDGSpin();
particle.lifetime = g4_particle_def.GetPDGLifeTime();
particle.is_stable = g4_particle_def.GetPDGStable();
if (!particle.is_stable)
{
// Convert lifetime of unstable particles to seconds
particle.lifetime *= time_scale;
}
particles.push_back(particle);
}
CELER_LOG(debug) << "Loaded " << particles.size() << " particles";
CELER_ENSURE(!particles.empty());
return particles;
}
//---------------------------------------------------------------------------//
/*!
* Return a populated \c ImportIsotope vector.
*/
std::vector<ImportIsotope> import_isotopes()
{
auto const& g4isotope_table = *G4Isotope::GetIsotopeTable();
CELER_EXPECT(!g4isotope_table.empty());
std::vector<ImportIsotope> isotopes(g4isotope_table.size());
for (auto idx : range(g4isotope_table.size()))
{
if (!g4isotope_table[idx])
{
CELER_LOG(warning) << "Skipping import of null isotope at index \'"
<< idx << "\' of the G4IsotopeTable";
continue;
}
auto const& g4isotope = *g4isotope_table[idx];
ImportIsotope& isotope = isotopes[idx];
isotope.name = g4isotope.GetName();
isotope.atomic_number = g4isotope.GetZ();
isotope.atomic_mass_number = g4isotope.GetN();
isotope.nuclear_mass = G4NucleiProperties::GetNuclearMass(
isotope.atomic_mass_number, isotope.atomic_number);
}
CELER_ENSURE(!isotopes.empty());
CELER_LOG(debug) << "Loaded " << isotopes.size() << " isotopes";
return isotopes;
}
//---------------------------------------------------------------------------//
/*!
* Return a populated \c ImportElement vector.
*/
std::vector<ImportElement> import_elements()
{
std::vector<ImportElement> elements;
auto const& g4element_table = *G4Element::GetElementTable();
CELER_EXPECT(!g4element_table.empty());
elements.resize(g4element_table.size());
// Loop over element data
for (auto const& g4element : g4element_table)
{
CELER_ASSERT(g4element);
auto const& g4isotope_vec = *g4element->GetIsotopeVector();
CELER_ASSERT(g4isotope_vec.size() == g4element->GetNumberOfIsotopes());
// Add element to ImportElement vector
ImportElement element;
element.name = g4element->GetName();
element.atomic_number = g4element->GetZ();
element.atomic_mass = g4element->GetAtomicMassAmu();
// Despite the function name, this is *NOT* a vector, it's an array
double* const g4rel_abundance = g4element->GetRelativeAbundanceVector();
double total_el_abundance_fraction = 0; // Verify that the sum is ~1
for (auto idx : range(g4element->GetNumberOfIsotopes()))
{
ImportElement::IsotopeFrac key;
key.first = g4isotope_vec[idx]->GetIndex();
key.second = g4rel_abundance[idx];
element.isotopes_fractions.push_back(std::move(key));
total_el_abundance_fraction += g4rel_abundance[idx];
}
CELER_VALIDATE(soft_equal(1., total_el_abundance_fraction),
<< "Total relative isotopic abundance for element `"
<< element.name
<< "` should sum to 1, but instead sum to "
<< total_el_abundance_fraction);
elements[g4element->GetIndex()] = element;
}
CELER_ENSURE(!elements.empty());
CELER_LOG(debug) << "Loaded " << elements.size() << " elements";
return elements;
}
//---------------------------------------------------------------------------//
/*!
* Store material-dependent optical properties.
*
* This returns a map of material index to imported optical property data.
*/
ImportData::ImportOpticalMap import_optical()
{
auto const& pct = *G4ProductionCutsTable::GetProductionCutsTable();
auto num_materials = pct.GetTableSize();
CELER_ASSERT(num_materials > 0);
auto const& particle_map = optical_particles_map();
ImportData::ImportOpticalMap result;
// Loop over optical materials
for (auto mat_idx : range(num_materials))
{
auto const* mcc = pct.GetMaterialCutsCouple(mat_idx);
CELER_ASSERT(mcc);
CELER_ASSERT(static_cast<std::size_t>(mcc->GetIndex()) == mat_idx);
auto const* material = mcc->GetMaterial();
CELER_ASSERT(material);
// Add optical material properties, if any are present
auto const* mpt = material->GetMaterialPropertiesTable();
if (!mpt)
{
continue;
}
ImportOpticalMaterial optical;
MatPropGetter get_property{*mpt};
// Save common properties
get_property.vector(&optical.properties.refractive_index,
"RINDEX",
ImportUnits::unitless);
// Save scintillation properties
{
// Material scintillation properties
get_property.scalar(
&optical.scintillation.material.yield_per_energy,
"SCINTILLATIONYIELD",
ImportUnits::inv_mev);
get_property.scalar(&optical.scintillation.resolution_scale,
"RESOLUTIONSCALE",
ImportUnits::unitless);
optical.scintillation.material.components
= fill_vec_import_scint_comp(get_property);
// Particle scintillation properties
for (auto const& iter : particle_map)
{
auto const& particle_name = iter.first;
ImportScintData::IPSS scint_part_spec;
get_property.vector(&scint_part_spec.yield_vector,
particle_name + "SCINTILLATIONYIELD",
ImportUnits::inv_mev);
scint_part_spec.components
= fill_vec_import_scint_comp(get_property, particle_name);
if (scint_part_spec)
{
optical.scintillation.particles.insert(
{iter.second.get(), std::move(scint_part_spec)});
}
}
}
// Save Rayleigh properties
get_property.vector(
&optical.rayleigh.mfp, "RAYLEIGH", ImportUnits::len);
get_property.scalar(&optical.rayleigh.scale_factor,
"RS_SCALE_FACTOR",
ImportUnits::unitless);
get_property.scalar(&optical.rayleigh.compressibility,
"ISOTHERMAL_COMPRESSIBILITY",
ImportUnits::len_time_sq_per_mass);
// Save absorption properties
get_property.vector(&optical.absorption.absorption_length,
"ABSLENGTH",
ImportUnits::len);
// Save WLS properties
get_property.scalar(&optical.wls.mean_num_photons,
"WLSMEANNUMBERPHOTONS",
ImportUnits::unitless);
get_property.scalar(
&optical.wls.time_constant, "WLSTIMECONSTANT", ImportUnits::time);
get_property.vector(
&optical.wls.absorption_length, "WLSABSLENGTH", ImportUnits::len);
get_property.vector(
&optical.wls.component, "WLSCOMPONENT", ImportUnits::unitless);
if (optical)
{
result[mat_idx] = optical;
}
}
CELER_LOG(debug) << "Loaded " << result.size() << " optical materials";
return result;
}
//---------------------------------------------------------------------------//
/*!
* Return a populated \c ImportMaterial vector.
*
* TODO: there is an inconsitency between "materials" (index in the
* global material table) and "material cut couple" (which is what we're
* defining here?). We need another level of indirection for material and
* material+cutoff ("physics material").
*/
std::vector<ImportMaterial>
import_materials(GeantImporter::DataSelection::Flags particle_flags)
{
ParticleFilter include_particle{particle_flags};
auto const& g4production_cuts_table
= *G4ProductionCutsTable::GetProductionCutsTable();
std::vector<ImportMaterial> materials;
materials.resize(g4production_cuts_table.GetTableSize());
CELER_VALIDATE(!materials.empty(),
<< "no Geant4 production cuts are defined (you may "
"need to call G4RunManager::RunInitialization)");
using CutRange = std::pair<G4ProductionCutsIndex,
std::unique_ptr<G4VRangeToEnergyConverter>>;
std::vector<CutRange> cut_converters;
for (auto gi : range(NumberOfG4CutIndex))
{
PDGNumber pdg = to_pdg(gi);
if (!include_particle(pdg))
{
continue;
}
std::unique_ptr<G4VRangeToEnergyConverter> converter;
switch (gi)
{
case idxG4GammaCut:
converter = std::make_unique<G4RToEConvForGamma>();
break;
case idxG4ElectronCut:
converter = std::make_unique<G4RToEConvForElectron>();
break;
case idxG4PositronCut:
converter = std::make_unique<G4RToEConvForPositron>();
break;
case idxG4ProtonCut:
converter = std::make_unique<G4RToEConvForProton>();
break;
default:
CELER_ASSERT_UNREACHABLE();
}
cut_converters.emplace_back(gi, std::move(converter));
}
double const numdens_scale
= native_value_from_clhep(ImportUnits::inv_len_cb);
double const len_scale = native_value_from_clhep(ImportUnits::len);
// Loop over material data
for (auto i : range(materials.size()))
{
// Fetch material, element, and production cuts lists
auto const* g4material_cuts_couple
= g4production_cuts_table.GetMaterialCutsCouple(i);
auto const* g4material = g4material_cuts_couple->GetMaterial();
auto const* g4elements = g4material->GetElementVector();
auto const* g4prod_cuts = g4material_cuts_couple->GetProductionCuts();
CELER_ASSERT(g4material_cuts_couple);
CELER_ASSERT(g4material);
CELER_ASSERT(g4elements);
CELER_ASSERT(g4prod_cuts);
CELER_ASSERT(
static_cast<std::size_t>(g4material_cuts_couple->GetIndex()) == i);
// Populate material information
ImportMaterial material;
material.name = g4material->GetName();
material.state = to_material_state(g4material->GetState());
material.temperature = g4material->GetTemperature(); // [K]
material.number_density = g4material->GetTotNbOfAtomsPerVolume()
* numdens_scale;
// Populate material production cut values
for (auto const& idx_convert : cut_converters)
{
G4ProductionCutsIndex g4i = idx_convert.first;
G4VRangeToEnergyConverter& converter = *idx_convert.second;
double const range = g4prod_cuts->GetProductionCut(g4i);
double const energy = converter.Convert(range, g4material);
ImportProductionCut cutoffs;
cutoffs.energy = energy * mev_scale;
cutoffs.range = range * len_scale;
material.pdg_cutoffs.insert({to_pdg(g4i).get(), cutoffs});
}
// Populate element information for this material
for (int j : range(g4elements->size()))
{
auto const& g4element = g4elements->at(j);
CELER_ASSERT(g4element);
ImportMatElemComponent elem_comp;
elem_comp.element_id = g4element->GetIndex();
double elem_num_density = g4material->GetVecNbOfAtomsPerVolume()[j]
* numdens_scale;
elem_comp.number_fraction = elem_num_density
/ material.number_density;
// Add material's element information
material.elements.push_back(elem_comp);
}
// Sort element components by increasing element ID
std::sort(material.elements.begin(),
material.elements.end(),
[](ImportMatElemComponent const& lhs,
ImportMatElemComponent const& rhs) {
return lhs.element_id < rhs.element_id;
});
// Add material to vector
materials[i] = material;
}
CELER_LOG(debug) << "Loaded " << materials.size() << " materials";
CELER_ENSURE(!materials.empty());
return materials;
}
//---------------------------------------------------------------------------//
/*!
* Return a populated \c ImportProcess vector.
*/
auto import_processes(GeantImporter::DataSelection::Flags process_flags,
std::vector<ImportParticle> const& particles,
std::vector<ImportElement> const& elements,
std::vector<ImportMaterial> const& materials)
-> std::pair<std::vector<ImportProcess>, std::vector<ImportMscModel>>
{
ParticleFilter include_particle{process_flags};
ProcessFilter include_process{process_flags};
std::vector<ImportProcess> processes;
std::vector<ImportMscModel> msc_models;
static celeritas::TypeDemangler<G4VProcess> const demangle_process;
std::unordered_map<G4VProcess const*, G4ParticleDefinition const*> visited;
detail::GeantProcessImporter import_process(
detail::TableSelection::minimal, materials, elements);
auto append_process = [&](G4ParticleDefinition const& particle,
G4VProcess const& process) -> void {
// Check for duplicate processes
auto [prev, inserted] = visited.insert({&process, &particle});
if (!inserted)
{
CELER_LOG(debug)
<< "Skipping process '" << process.GetProcessName()
<< "' (RTTI: " << demangle_process(process)
<< ") for particle " << particle.GetParticleName()
<< ": duplicate of particle "
<< prev->second->GetParticleName();
return;
}
if (auto const* gg_process
= dynamic_cast<G4GammaGeneralProcess const*>(&process))
{
#if G4VERSION_NUMBER >= 1060
// Extract the real EM processes embedded inside "gamma general"
// using an awkward string-based lookup which is the only one
// available to us :(
for (auto emproc_enum : range(ImportProcessClass::size_))
{
if (G4VEmProcess const* subprocess
= const_cast<G4GammaGeneralProcess*>(gg_process)
->GetEmProcess(to_geant_name(emproc_enum)))
{
processes.push_back(import_process(particle, *subprocess));
}
}
#else
CELER_DISCARD(gg_process);
CELER_NOT_IMPLEMENTED("GammaGeneralProcess for Geant4 < 10.6");
#endif
}
else if (auto const* em_process
= dynamic_cast<G4VEmProcess const*>(&process))
{
processes.push_back(import_process(particle, *em_process));
}
else if (auto const* el_process
= dynamic_cast<G4VEnergyLossProcess const*>(&process))
{
processes.push_back(import_process(particle, *el_process));
}
else if (auto const* msc_process
= dynamic_cast<G4VMultipleScattering const*>(&process))
{
// Unpack MSC process into multiple MSC models
auto new_msc_models = import_process(particle, *msc_process);
msc_models.insert(msc_models.end(),
std::make_move_iterator(new_msc_models.begin()),
std::make_move_iterator(new_msc_models.end()));
}
else
{
CELER_LOG(error)
<< "Cannot export unknown process '"
<< process.GetProcessName()
<< "' (RTTI: " << demangle_process(process) << ")";
}
};
for (auto const& p : particles)
{
G4ParticleDefinition const* g4_particle_def
= G4ParticleTable::GetParticleTable()->FindParticle(p.pdg);
CELER_ASSERT(g4_particle_def);
if (!include_particle(PDGNumber{g4_particle_def->GetPDGEncoding()}))
{
CELER_LOG(debug) << "Filtered all processes from particle '"
<< g4_particle_def->GetParticleName() << "'";
continue;
}
G4ProcessVector const& process_list
= *g4_particle_def->GetProcessManager()->GetProcessList();
for (auto j : range(process_list.size()))
{
G4VProcess const& process = *process_list[j];
if (!include_process(process.GetProcessType()))
{
CELER_LOG(debug)
<< "Filtered process '" << process.GetProcessName() << "'";
continue;
}
append_process(*g4_particle_def, process);
}
}
CELER_LOG(debug) << "Loaded " << processes.size() << " processes";
return {std::move(processes), std::move(msc_models)};
}
//---------------------------------------------------------------------------//
/*!
* Get the transportation process for a given particle type.
*/
G4Transportation const* get_transportation(G4ParticleDefinition const* particle)
{
CELER_EXPECT(particle);
auto const* pm = particle->GetProcessManager();
CELER_ASSERT(pm);
// Search through the processes to find transportion (it should be the
// first one)
auto const& pl = *pm->GetProcessList();
for (auto i : range(pl.size()))
{
if (auto const* trans = dynamic_cast<G4Transportation const*>(pl[i]))
{
return trans;
}
}
return nullptr;
}
//---------------------------------------------------------------------------//
/*!
* Store particle-dependent transportation parameters.
*/
ImportTransParameters
import_trans_parameters(GeantImporter::DataSelection::Flags particle_flags)
{
ImportTransParameters result;
// Get the maximum number of substeps in the field propagator
auto const* tm = G4TransportationManager::GetTransportationManager();
CELER_ASSERT(tm);
if (auto const* fp = tm->GetPropagatorInField())
{
result.max_substeps = fp->GetMaxLoopCount();
}
G4ParticleTable::G4PTblDicIterator& particle_iterator
= *(G4ParticleTable::GetParticleTable()->GetIterator());
particle_iterator.reset();
ParticleFilter include_particle{particle_flags};
while (particle_iterator())
{
auto const* particle = particle_iterator.value();
if (!include_particle(PDGNumber{particle->GetPDGEncoding()}))
{
continue;
}
// Get the transportation process
auto const* trans = get_transportation(particle);
CELER_ASSERT(trans);
// Get the threshold values for killing looping tracks
ImportLoopingThreshold looping;
looping.threshold_trials = trans->GetThresholdTrials();
looping.important_energy = trans->GetThresholdImportantEnergy()
* mev_scale;
CELER_ASSERT(looping);
result.looping.insert({particle->GetPDGEncoding(), looping});
}
CELER_ENSURE(result);
return result;
}
//---------------------------------------------------------------------------//
/*!
* Return a \c ImportData::ImportEmParamsMap .
*/
ImportEmParameters import_em_parameters()
{
ImportEmParameters import;
auto const& g4 = *G4EmParameters::Instance();
double const len_scale = native_value_from_clhep(ImportUnits::len);
import.energy_loss_fluct = g4.LossFluctuation();
import.lpm = g4.LPM();
import.integral_approach = g4.Integral();
import.linear_loss_limit = g4.LinearLossLimit();
import.lowest_electron_energy = g4.LowestElectronEnergy() * mev_scale;
import.auger = g4.Auger();
import.msc_step_algorithm = to_msc_step_algorithm(g4.MscStepLimitType());
import.msc_range_factor = g4.MscRangeFactor();
#if G4VERSION_NUMBER >= 1060
import.msc_safety_factor = g4.MscSafetyFactor();
import.msc_lambda_limit = g4.MscLambdaLimit() * len_scale;
#else
CELER_DISCARD(len_scale);
#endif
import.apply_cuts = g4.ApplyCuts();
import.screening_factor = g4.ScreeningFactor();
CELER_ENSURE(import);
return import;
}
//---------------------------------------------------------------------------//
} // namespace
//---------------------------------------------------------------------------//
/*!
* Get an externally loaded Geant4 top-level geometry element.
*
* This is only defined if Geant4 has already been set up. It's meant to be
* used in concert with GeantImporter or other Geant-importing classes.
*/
G4VPhysicalVolume const* GeantImporter::get_world_volume()
{
auto* man = G4TransportationManager::GetTransportationManager();
CELER_ASSERT(man);
auto* nav = man->GetNavigatorForTracking();
CELER_ASSERT(nav);
auto* world = nav->GetWorldVolume();
CELER_VALIDATE(world,
<< "no world volume has been defined in the navigator");
return world;
}
//---------------------------------------------------------------------------//
/*!
* Construct from an existing Geant4 geometry, assuming physics is loaded.
*/
GeantImporter::GeantImporter(G4VPhysicalVolume const* world) : world_(world)
{
CELER_EXPECT(world_);
}
//---------------------------------------------------------------------------//
/*!
* Construct by capturing a GeantSetup object.
*/
GeantImporter::GeantImporter(GeantSetup&& setup) : setup_(std::move(setup))
{
CELER_EXPECT(setup_);
world_ = setup_.world();
CELER_ENSURE(world_);
}
//---------------------------------------------------------------------------//
/*!
* Load data from Geant4.
*/
ImportData GeantImporter::operator()(DataSelection const& selected)
{
CELER_VALIDATE(
(selected.materials && selected.particles != DataSelection::none)
|| selected.processes == DataSelection::none,
<< "materials and particles must be enabled if requesting processes");
ScopedMem record_mem("GeantImporter.load");
ScopedProfiling profile_this{"import-geant"};
ImportData imported;
{
CELER_LOG(status) << "Transferring data from Geant4";
ScopedGeantExceptionHandler scoped_exceptions;
ScopedTimeLog scoped_time;
if (selected.particles != DataSelection::none)
{
imported.particles = import_particles(selected.particles);
}
if (selected.materials)
{
imported.isotopes = import_isotopes();
imported.elements = import_elements();
imported.materials = import_materials(selected.particles);
imported.optical = import_optical();
}
if (selected.processes != DataSelection::none)