source: trunk/source/processes/biasing/src/G4WeightCutOffProcess.cc@ 819

Last change on this file since 819 was 819, checked in by garnier, 17 years ago

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1//
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17// * *
18// * This code implementation is the result of the scientific and *
19// * technical work of the GEANT4 collaboration. *
20// * By using, copying, modifying or distributing the software (or *
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24// ********************************************************************
25//
26//
27// $Id: G4WeightCutOffProcess.cc,v 1.2 2007/06/01 09:16:34 ahoward Exp $
28// GEANT4 tag $Name: $
29//
30// ----------------------------------------------------------------------
31// GEANT 4 class source file
32//
33// G4WeightCutOffProcess.cc
34//
35// ----------------------------------------------------------------------
36
37#include "G4WeightCutOffProcess.hh"
38//#include "G4VScorer.hh"
39#include "G4GeometryCellStep.hh"
40#include "G4GCellFinder.hh"
41#include "G4TouchableHandle.hh"
42#include "G4VIStore.hh"
43
44#include "G4Step.hh"
45#include "G4Navigator.hh"
46#include "G4VTouchable.hh"
47#include "G4VPhysicalVolume.hh"
48#include "G4ParticleChange.hh"
49#include "G4PathFinder.hh"
50#include "G4TransportationManager.hh"
51#include "G4StepPoint.hh"
52#include "G4FieldTrackUpdator.hh"
53
54
55G4WeightCutOffProcess::
56G4WeightCutOffProcess(G4double wsurvival,
57 G4double wlimit,
58 G4double isource,
59 G4VIStore *istore,
60 const G4VGCellFinder &aGCellFinder,
61 const G4String &aName, G4bool para)
62 : G4VProcess(aName),
63 fParticleChange(new G4ParticleChange),
64 fWeightSurvival(wsurvival),
65 fWeightLimit(wlimit),
66 fSourceImportance(isource),
67 fIStore(istore),
68 fGCellFinder(aGCellFinder),
69 fGhostNavigator(0), fNavigatorID(-1), fFieldTrack('0')
70{
71 if (!fParticleChange)
72 {
73 G4Exception("G4WeightCutOffProcess::G4WeightCutOffProcess()",
74 "FatalError", FatalException,
75 "Failed to allocate G4ParticleChange !");
76 }
77
78 G4VProcess::pParticleChange = fParticleChange;
79
80 fGhostStep = new G4Step();
81 fGhostPreStepPoint = fGhostStep->GetPreStepPoint();
82 fGhostPostStepPoint = fGhostStep->GetPostStepPoint();
83
84 fTransportationManager = G4TransportationManager::GetTransportationManager();
85 fPathFinder = G4PathFinder::GetInstance();
86
87 if (verboseLevel>0)
88 {
89 G4cout << GetProcessName() << " is created " << G4endl;
90 }
91
92 paraflag = para;
93
94}
95
96G4WeightCutOffProcess::~G4WeightCutOffProcess()
97{
98 delete fParticleChange;
99 delete fGhostStep;
100}
101
102
103//------------------------------------------------------
104//
105// SetParallelWorld
106//
107//------------------------------------------------------
108void G4WeightCutOffProcess::
109SetParallelWorld(G4String parallelWorldName)
110{
111//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
112// Get pointers of the parallel world and its navigator
113//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
114 fGhostWorldName = parallelWorldName;
115 fGhostWorld = fTransportationManager->GetParallelWorld(fGhostWorldName);
116 fGhostNavigator = fTransportationManager->GetNavigator(fGhostWorld);
117//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
118}
119
120void G4WeightCutOffProcess::
121SetParallelWorld(G4VPhysicalVolume* parallelWorld)
122{
123//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
124// Get pointer of navigator
125//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
126 fGhostWorldName = parallelWorld->GetName();
127 fGhostWorld = parallelWorld;
128 fGhostNavigator = fTransportationManager->GetNavigator(fGhostWorld);
129//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
130}
131
132//------------------------------------------------------
133//
134// StartTracking
135//
136//------------------------------------------------------
137void G4WeightCutOffProcess::StartTracking(G4Track* trk)
138{
139//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
140// Activate navigator and get the navigator ID
141//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
142// G4cout << " G4ParallelWorldScoringProcess::StartTracking" << G4endl;
143
144 if(paraflag) {
145 if(fGhostNavigator)
146 { fNavigatorID = fTransportationManager->ActivateNavigator(fGhostNavigator); }
147 else
148 {
149 G4Exception("G4WeightCutOffProcess::StartTracking",
150 "ProcParaWorld000",FatalException,
151 "G4WeightCutOffProcess is used for tracking without having a parallel world assigned");
152 }
153//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
154
155// G4cout << "G4ParallelWorldScoringProcess::StartTracking <<<<<<<<<<<<<<<<<< " << G4endl;
156//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
157// Let PathFinder initialize
158//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
159 fPathFinder->PrepareNewTrack(trk->GetPosition(),trk->GetMomentumDirection());
160//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
161
162//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
163// Setup initial touchables for the first step
164//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
165 fOldGhostTouchable = fPathFinder->CreateTouchableHandle(fNavigatorID);
166 fGhostPreStepPoint->SetTouchableHandle(fOldGhostTouchable);
167 fNewGhostTouchable = fOldGhostTouchable;
168 fGhostPostStepPoint->SetTouchableHandle(fNewGhostTouchable);
169
170 // Initialize
171 fGhostSafety = -1.;
172 fOnBoundary = false;
173 }
174}
175
176
177G4double G4WeightCutOffProcess::
178PostStepGetPhysicalInteractionLength(const G4Track &,
179 G4double, G4ForceCondition* condition)
180{
181// *condition = Forced;
182// return kInfinity;
183
184// *condition = StronglyForced;
185 *condition = Forced;
186 return DBL_MAX;
187}
188
189G4VParticleChange *
190G4WeightCutOffProcess::PostStepDoIt(const G4Track& aTrack,
191 const G4Step &aStep)
192{
193 fParticleChange->Initialize(aTrack);
194
195 if(paraflag) {
196 fOldGhostTouchable = fGhostPostStepPoint->GetTouchableHandle();
197 //xbug? fOnBoundary = false;
198 CopyStep(aStep);
199
200 if(fOnBoundary)
201 {
202//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
203// Locate the point and get new touchable
204//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
205 //?? fPathFinder->Locate(step.GetPostStepPoint()->GetPosition(),
206 //?? step.GetPostStepPoint()->GetMomentumDirection());
207 fNewGhostTouchable = fPathFinder->CreateTouchableHandle(fNavigatorID);
208//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
209 }
210 else
211 {
212 // Do I need this ??????????????????????????????????????????????????????????
213 // fGhostNavigator->LocateGlobalPointWithinVolume(track.GetPosition());
214 // ?????????????????????????????????????????????????????????????????????????
215
216 // fPathFinder->ReLocate(track.GetPosition());
217
218 // reuse the touchable
219 fNewGhostTouchable = fOldGhostTouchable;
220 }
221
222 fGhostPreStepPoint->SetTouchableHandle(fOldGhostTouchable);
223 fGhostPostStepPoint->SetTouchableHandle(fNewGhostTouchable);
224
225 }
226
227 G4GeometryCell postCell = fGCellFinder.GetPostGeometryCell(aStep);
228 // G4GeometryCell postCell = fGCellFinder.GetPostGeometryCell(fGhostStep);
229 G4double R = fSourceImportance;
230 if (fIStore)
231 {
232 G4double i = fIStore->GetImportance(postCell);
233 if (i>0)
234 {
235 R/=i;
236 }
237 }
238 G4double w = aTrack.GetWeight();
239 if (w<R*fWeightLimit)
240 {
241 G4double ws = fWeightSurvival*R;
242 G4double p = w/(ws);
243 if (G4UniformRand()<p)
244 {
245 fParticleChange->ProposeTrackStatus(fStopAndKill);
246 }
247 else
248 {
249 fParticleChange->ProposeWeight(ws);
250 }
251 }
252 return fParticleChange;
253}
254
255const G4String &G4WeightCutOffProcess::GetName() const
256{
257 return theProcessName;
258}
259
260G4double G4WeightCutOffProcess::
261AlongStepGetPhysicalInteractionLength(
262 const G4Track& track, G4double previousStepSize, G4double currentMinimumStep,
263 G4double& proposedSafety, G4GPILSelection* selection)
264{
265 if(paraflag) {
266 static G4FieldTrack endTrack('0');
267 static ELimited eLimited;
268
269 *selection = NotCandidateForSelection;
270 G4double returnedStep = DBL_MAX;
271
272 if (previousStepSize > 0.)
273 { fGhostSafety -= previousStepSize; }
274 // else
275 // { fGhostSafety = -1.; }
276 if (fGhostSafety < 0.) fGhostSafety = 0.0;
277
278 // ------------------------------------------
279 // Determination of the proposed STEP LENGTH:
280 // ------------------------------------------
281 if (currentMinimumStep <= fGhostSafety && currentMinimumStep > 0.)
282 {
283 // I have no chance to limit
284 returnedStep = currentMinimumStep;
285 fOnBoundary = false;
286 proposedSafety = fGhostSafety - currentMinimumStep;
287 }
288 else // (currentMinimumStep > fGhostSafety: I may limit the Step)
289 {
290 G4FieldTrackUpdator::Update(&fFieldTrack,&track);
291 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
292 // ComputeStep
293 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
294 returnedStep
295 = fPathFinder->ComputeStep(fFieldTrack,currentMinimumStep,fNavigatorID,
296 track.GetCurrentStepNumber(),fGhostSafety,eLimited,
297 endTrack,track.GetVolume());
298 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
299 if(eLimited == kDoNot)
300 {
301 // Track is not on the boundary
302 fOnBoundary = false;
303 fGhostSafety = fGhostNavigator->ComputeSafety(endTrack.GetPosition());
304 }
305 else
306 {
307 // Track is on the boundary
308 fOnBoundary = true;
309 proposedSafety = fGhostSafety;
310 }
311 //xbug? proposedSafety = fGhostSafety;
312 if(eLimited == kUnique || eLimited == kSharedOther) {
313 *selection = CandidateForSelection;
314 }else if (eLimited == kSharedTransport) {
315 returnedStep *= (1.0 + 1.0e-9);
316 // Expand to disable its selection in Step Manager comparison
317 }
318
319 }
320
321 // ----------------------------------------------
322 // Returns the fGhostSafety as the proposedSafety
323 // The SteppingManager will take care of keeping
324 // the smallest one.
325 // ----------------------------------------------
326 return returnedStep;
327
328 } else {
329 return DBL_MAX;
330 //not sensible! return -1.0;
331 }
332
333}
334
335
336G4double G4WeightCutOffProcess::
337AtRestGetPhysicalInteractionLength(const G4Track& ,
338 G4ForceCondition*)
339{
340 return -1.0;
341}
342
343G4VParticleChange*
344G4WeightCutOffProcess::AtRestDoIt(const G4Track&, const G4Step&)
345{
346 return 0;
347}
348
349G4VParticleChange*
350G4WeightCutOffProcess::AlongStepDoIt(const G4Track& track, const G4Step&)
351{
352 // Dummy ParticleChange ie: does nothing
353 // Expecting G4Transportation to move the track
354 pParticleChange->Initialize(track);
355 return pParticleChange;
356
357 // return 0;
358}
359
360void G4WeightCutOffProcess::CopyStep(const G4Step & step)
361{
362 fGhostStep->SetTrack(step.GetTrack());
363 fGhostStep->SetStepLength(step.GetStepLength());
364 fGhostStep->SetTotalEnergyDeposit(step.GetTotalEnergyDeposit());
365 fGhostStep->SetControlFlag(step.GetControlFlag());
366
367 *fGhostPreStepPoint = *(step.GetPreStepPoint());
368 *fGhostPostStepPoint = *(step.GetPostStepPoint());
369
370//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
371// Set StepStatus for ghost world
372//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
373 if(fOnBoundary)
374 { fGhostPostStepPoint->SetStepStatus(fGeomBoundary); }
375 else if(fGhostPostStepPoint->GetStepStatus()==fGeomBoundary)
376 { fGhostPostStepPoint->SetStepStatus(fPostStepDoItProc); }
377//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
378}
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