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     Geant4 - an Object-Oriented Toolkit for Simulation in HEP
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                      Category History file
                      ---------------------
This file should be used by G4 developers and category coordinators
to briefly summarize all major modifications introduced in the code
and keep track of all category-tags.
It DOES NOT substitute the  CVS log-message one should put at every
committal in the CVS repository !

     ----------------------------------------------------------
     * Reverse chronological order (last date on top), please *
     ----------------------------------------------------------

April 16th, 2021 Ben Morgan (procbiasing-V10-07-00)
- Migrate build to modular CMake API

September 4th, 2020  Gabriele Cosmo (procbiasing-V10-06-01)
- Fixed Coverity defect warnings for data initialisation and leaks in classes
  G4WeightCutOffProcess, G4ImportanceProcess and G4WeightWindowProcess.

February 17th, 2020 Vladimir Ivanchenko (procbiasing-V10-06-00)
- G4ImportanceProcess: added process type as fParallel

November 15th, 2019   Gabriele Cosmo (procbiasing-V10-05-01)
- Fixed cases of implicit type conversions from size_t to G4int.

March 11th, 2019   Gabriele Cosmo (procbiasing-V10-05-00)
- Fixed typos in printouts and comments.

May 17th, 2018   Jonathan Madsen (procbiasing-V10-04-03)
- updated "thread-local-static-var" model to
  "function-returning-thread-local-static-reference" model
  which fixes Windows DLL + MT

February 26th, 2018  Alexander Howard (procbiasing-V10-04-02)
- G4ImportanceConfigurator: cleaned up unnecessary G4cout and removed
  copy of G4String - thanks to Gabriele

February 21st, 2018  Alexander Howard (procbiasing-V10-04-01)
- G4ImportanceConfigurator: put back clear() in the destructor

February 21st, 2018  Alexander Howard (procbiasing-V10-04-00)
- G4ImportanceConfigurator: introduced AutoLock (G4Mutex) to protect
  instantiation of the biasing process against a threadrace

August 29th, 2017  Gabriele Cosmo (procbiasing-V10-03-03)
- Removed duplicate class definition G4TrackTerminator.hh, which is part
  of the processes/transportation module.

July 14th, 2017  Gabriele Cosmo (procbiasing-V10-03-02)
- G4ImportanceConfigurator: removed debug printout in destructor.

March 7th, 2017  Alexander Howard (procbiasing-V10-03-01)
- G4GeometrySampler: removed unnecessary ClearSampling from the destructor

Mar 10th, 2015 Gabriele Cosmo (procbiasing-V10-01-00)
- G4ImportanceProcess, G4WeightCutOffProcess, G4WeightWindowProcess: made
  static thread-local variables into class data members.
  Renamed them accordingly: fEndTrack, feLimited, fParaflag.
  Use const reference for string in argument in SetParallelWorld().

Nov 30th, 2013 Alex Howard (procbiasing-V09-06-18)
    - Moved static methods in the initialiser to the body for G4GeometrySampler
      and G4ImportanceConfigurator

Nov 30th, 2013 Alex Howard (procbiasing-V09-06-17)
    - Fixed coverity errors (uninitialised variables),
      EXCEPT for fGhostStep in G4ImportanceProcess, G4WeightWindowProcess
      and G4WeightCutOffProcess

Nov 29th, 2013 Alex Howard (procbiasing-V09-06-16)
    - Put back RemoveProcess for both G4WeightWindowConfigurator and
      G4ImportanceConfigurator - makes test33 work.

Nov 28th, 2013 Marc Verderi (procbiasing-V09-06-15)
    - include license/disclaimer in headers in generic and management
    - include comments and description
    - change G4cout in G4Exception when appropriate

Nov 28th, 2013 Alex Howard (procbiasing-V09-06-14)
    - Put back RemoveProcess for G4WeightCutOffConfigurator since it is not
      associated with a store singleton.

Nov 26th, 2013 Alex Howard (procbiasing-V09-06-13)
    - Fixing history file for actual tag names - which have probiasing instead
      of procbiasing!!

Nov 24th, 2013 Alex Howard (procbiasing-V09-06-12)
    - Fixed segmentation fault in mass only case (deleted non-existent objects)

Nov 24th, 2013 Alex Howard (probiasing-V09-06-11)
    - Fixed segmentation fault at the end of an MT run
    - caused by deleting fGhostStep in the destructor
    - removed RemoveProcess from the destructor (ClearSampling) of configurators
    - also caused an out of range index with MT

Nov 22nd, 2013 Alex Howard (probiasing-V09-06-10)
    - Included guard for single threaded backward compatability
    - except for singleton instantiation

Nov 22nd, 2013 Alex Howard (probiasing-V09-06-09 also procbiasing-V09-06-09)
    - Migration of WeightWindow importance biasing to MT

Nov 22nd, 2013 Alex Howard (probiasing-V09-06-08)
    - Migration of geometrical importance biasing to MT
    - moved G4VProcessPlacer and G4ProcessPlacer to management (from importance)

Nov 9th, 2013 Andrea Dotti (probiasing-V09-06-07)
    - Bug fixing for unused data members identified by clang 3.2

Nov 8th, 2013 Marc Verderi (probiasing-V09-06-06)
    - Migration to MT
    - Adding force collision operator G4BOptrForceCollision and related classes

Nov 6th, 2013 Marc Verderi (probiasing-V09-06-05)
    - Introduce physics list configuration helper G4BiasingHelper
    - Introduce cross section change operation G4BOptnChangeCrossSection

Nov 5th, 2013 Marc Verderi (probiasing-V09-06-04)
    - fix compilation warnings in G4BiasingProcessInterface.hh
      for unused fWrappedProcessIsAtRest and fWrappedProcessIsPost
    - fix warning on windows in G4VBiasingOperation.cc constructor
    - fix error on void G4VBiasingOperator::ForgetTrack which
      was returning a value.

Nov 5th, 2013 Marc Verderi (probiasing-V09-06-03)
- add classes to generic and management to unblock other dev in process:
  - generic:
	G4BiasingProcessInterface
	G4InteractionLawPhysical
	G4ParticleChangeForNothing
	G4ParticleChangeForOccurenceBiasing
  - management:
	G4BiasingAppliedCase
	G4BiasingOperationManager
	G4BiasingTrackData
	G4BiasingTrackDataStore
	G4VBiasingInteractionLaw
	G4VBiasingOperation
	G4VBiasingOperator

Oct 9th, 2013 Alex Howard (procbiasing-V09-06-02)
- fixed sources.cmake for looking for non-existent files

Oct 9th, 2013 Alex Howard (procbiasing-V09-06-01)
- Added cmake and gnumake and sources.cmake files to new directory structure

Oct 9th, 2013 Alex Howard (procbiasing-V09-06-00)
- Re-ordered directory structure for generic physics biasing

June 7th, 2012 Gabriele Cosmo (procbiasing-V09-05-00)
- Fixed spurious cases of hidden variable visibility, detected with
  '-Wshadow' compilation option on gcc compiler.

Oct 21st, 2011 Alex Howard (procbiasing-V09-04-01)
- G4ProcessPlacer: Migrated to new G4Exception

May 30th, 2011 Alex Howard (procbiasing-V09-04-00)
- G4ProcessPlacer: Using SetProcessOrderingToSecond for biasing process, and
leaving transportation where it is (hopefully first). Previously biasing was
moved first, then transportation moved back to first.

June 2nd, 2010 Gabriele Cosmo (procbiasing-V09-03-00)
- G4WeightWindowProcess: corrected call to G4WeightWindowStore::GetLowerWeight()
  after correction of mispelling in name...
- Requires tag geombias-V09-03-00.

April 22nd, 2008 Alex Howard (procbiasing-V09-01-02)
- Removed G4CellFinder and associated dependency in G4WeigthCutOffProcess and
  G4WeightCutOffConfigurator- was a hang-up from previous implementation
  which was erroneously left in the G4WeightCutOffProcess.
  This meant the WeightCutOff could only work in a MASS geometry
  (by coincidence between the ImportanceBiasing and the GeometryCells).

April 21st, 2008 Alex Howard (procbiasing-V09-01-01)
- mis-tagged - please ignore

April 21st, 2008 Alex Howard (procbiasing-V09-01-00)
- Tag of the HEAD which includes scoring for backwards compatibility

October 31st, 2007 Alex Howard (procbiasing-V09-00-00)
- Fixed G4ProcessPlacer.cc to put biasing process second for AlongStep
  as well as PostStep - a bug which would feature for charged particles.
- Added print out for AlongStep process vector to avoid confusion

June 22nd, 2007 Alex Howard (procbiasing-V08-03-08)
- Added missing member function to G4VSampler base class

June 12th, 2007 Alex Howard (procbiasing-V08-03-05)
- Added CoupledTransportation name to G4ProcessPlacer

June 1st, 2007 Alex Howard (procbiasing-V08-03-04)
- Added missing source file G4VProcessPlacer.cc previously resident in
  processes/transportation
- Removed scoring inheritance in G4VSampler
- HEAD maintains inheritance for backward comparisons/testing

June 1st, 2007 Alex Howard (procbiasing-V08-03-03)
- Renamed New classes back to normal classes, simultaneously
  processes/transportation old biasing classes renamed with
  suffix 8 to avoid clashes.
- includes modified G4GeometrySampler (without scoring)
- HEAD contains un-modifier G4GeometrySampler and depends on old scoring scheme
  in geometry/biasing.

May 31st, 2007 Alex Howard (procbiasing-V08-03-02)
- removed dependency on old biasing within transportation and on old scoring
  within geometry
- G4GeometrySampler is modified to remove scoring dependency
- HEAD of G4GeometrySampler is the old file
- HEAD contains a different version of G4GeometrySampler that includes the old
  biasing scoring for the purpose of testing

May 30th, 2007 Alex Howard (procbiasing-V08-03-01)
- added missing includes to GNUmakefile

May 30th, 2007 Alex Howard (procbiasing-V08-03-00)
- migrated classes and tests from processes/scoring

May 25th, 2007 Jane Tinslay
- Add tests for physics biasing under test/physics_biasing

March 21st, 2007  G.Cosmo
- Module and history file created.


