$Id: History 77479 2013-11-25 10:01:22Z gcosmo $
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     =========================================================
     Geant4 - an Object-Oriented Toolkit for Simulation in HEP
     =========================================================

                      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 *
     ----------------------------------------------------------

History file for visualization/modeling
---------------------------------------

15th November 2013  John Allison  (modeling-V09-06-22)
- Some changes as suggested by PVS.

6th November 2013  John Allison  (modeling-V09-06-21)
- G4ArrowModel.cc: Tidied.

30th October 2013  Tatiana Nikitina  (modeling-V09-06-20)
- Make use of G4GenericPolycone in G4ArrowModel.
  Coworks with tag "geom-specific-V09-06-22".

30th September 2013  John Allison  (modeling-V09-06-19)
- Re-tagged after clean-up by Gunter and Mke.

27th September 2013  Michael Kelsey (modeling-V09-06-18)
- G4MagneticFieldModel.hh:  Remove expanded '$'Id'$' value and re-commit to
  (hopefully!) synchronize SVN state and eliminate "Modified" warnings in
  CDash.

21st September 2013  John Allison  (modeling-V09-06-17)
- G4MagneticFieldModel: Fix compiler warnings.

20th September 2013  John Allison  (modeling-V09-06-16)
- G4MagneticFieldModel: Added '$'Id'$' functionality.

2nd September 2013  John Allison
- G4MagneticFieldModel.cc:
  o Allowed for scene with extent not necessarily equal in x, y and z.

30th August 2013  John Allison  (modeling-V09-06-15)
- GNUmakefile: Added geometry/magneticfield/include.

29th August 2013  John Allison  (modeling-V09-06-14)
- G4MagneticFieldModel.cc: Fixed a corrupted file (SVN glitch?).

27th August 2013  John Allison  (modeling-V09-06-13)
- G4MagneticFieldModel:
  o Removed diagnostic print statements.
  o Note: Remaining print statements need converting to G4Exception.

26th August 2013  John Allison  (modeling-V09-06-12)
- G4MagneticFieldModel: Variable no. of data points per half scene.

25th August 2013  John Allison  (modeling-V09-06-11)
- G4MagneticFieldModel: Bug fix.

25th August 2013  John Allison  (modeling-V09-06-10)
- G4MagneticFieldModel: First attempt.

24th August 2013  John Allison  (modeling-V09-06-09 coworks visman-V09-06-11)
- Removed G4FlavoredParallelWorldModel.

18th August 2013  John Allison  (modeling-V09-06-08 requires greps-V09-06-06)
- Added skeleton G4MagneticFieldModel.

16th June 2013  John Allison  (modeling-V09-06-07)
- G4ModelingParameters: Small bug fix to previous tag.

10th June 2013  John Allison  (modeling-V09-06-06)
- G4ModelingParameters:
  o Replaced PVNameCopyNoPathNotEqual by appropriate operator!=.
  o Replaced VAMSNotEqual by appropriate operator!=.

29th May 2013  John Allison  (modeling-V09-06-05)
- G4PhysicalVolumeModel.cc: Bug fix for vis attribute modifying (VAM).
  (The boolean copyForVAM was not being reset after use.)

26th March 2013  John Allison  (modeling-V09-06-04)
- G4TrajectoryDrawByAttribute.cc: Improved G4Exception messages.

24th February 2013  John Allison  (modeling-V09-06-03)
- G4FlavoredParallelWorldModel:
  o Removed unused field as warned by new clang compiler.

14th January 2013  John Allison  (modeling-V09-06-02)
- G4ArrowModel, G4AxesModel:
  o Coverity fixes.

12th January 2013  John Allison  (modeling-V09-06-01)
- Coverity fixes:
  o G4PhysicalVolumeModel, G4TrajectoriesModel.
- Added verbosity flag for G4PhysicalVolumeSearchScene to reduce verbiage:
  o G4PhysicalVolumeModel, G4PhysicalVolumeSearchScene.

2nd December 2012  John Allison  (modeling-V09-06-00)
  o Removed NURBS and references to i_mode.

24th October 2012  John Allison  (modeling-V09-05-22)
- G4ModelingParameters:
  o Added fVisAttributesModifiers to operator<< and operator!=.
  o Added static functions VAMSNotEqual and PVNameCopyNoPathNotEqual to
    facilitate the above.
- G4PhysicalVolumeModel:
  o Allowed default constructor.  fpTopPV defaults to 0, checked with
    G4Exception(…FatalException…) in DescribeYourselfTo.  This allows
    one to instantiate a dummy so that one can print AttDefs, for example.

11th October 2012  John Allison  (modeling-V09-05-21)
- G4PhysicalVolumeModel and G4ModelingParameters:
  o Tidying. 

9th October 2012  John Allison  (modeling-V09-05-20)
- G4PhysicalVolumeModel and G4ModelingParameters:
  o Moved code for converting PVPath to the simpler version from
    G4PhysicalVolumeModel (in modeling-V09-05-19) to a new
    constructor of G4ModelingParameters::VisAttributesModifier.

9th October 2012  John Allison  (modeling-V09-05-19)
- G4PhysicalVolumeModel:
  o Added GetFullPVNameCopyNoPath, which converts fFullPVPath into a
    simpler (full) path for G4ModelingParameters and G4ViewParameters.

8th October 2012  John Allison  (modeling-V09-05-18)
- G4PhysicalVolumeModel.cc: Removed debug printing.
- G4ModelingParameters.cc: Improved operator<< for PVNameCopyNoPath.

8th October 2012  John Allison  (modeling-V09-05-17)
- G4ModelingParameters:
  o Further refinement to interface for /vis/touchable/set/...
  o Added operator<< for PVNameCopyNoPath.

8th October 2012  John Allison  (modeling-V09-05-16)
- G4ModelingParameters:
  o Refined interface for /vis/touchable/set/...
- G4PhysicalVolumeModel:
  o Added code for /vis/touchable/set/...

7th October 2012  John Allison  (modeling-V09-05-15)
- G4ModelingParameters:
  o Added enums and a nested class for communicating a modification to the vis
    attributes for a specfic touchable defined by PVNameCopyNoPath, to be used
    by new commands, /vis/touchable/set/...

6th October 2012  John Allison  (modeling-V09-05-14)
- G4PhysicalVolumeModel:
  o Added SetBaseFullPVPath.  The base full path is the full path of the top
    physical volume (actually the full path of the mother of the top physical
    volume), so that even if a user issues "/vis/drawVolume sub-detector", the
    full path includes the base full path, i.e., the full path up to the world
    volume.
- G4PhysicalVolumeSearchScene:
  o Added GetFoundFullPVPath.
 
1st October 2012  John Allison  (modeling-V09-05-13)
- G4PhysicalVolumeModel:: GetAttDefs: Small bug fix.
- G4TrajectoriesModel:
  o Added fEventID;
  o Added GetAttDefs and CreateCurrentAttValues for event ID.

28th September 2012  Gabriele Cosmo  (modeling-V09-05-12)
- Explicitly include units header in G4ArrowModel.cc.

25th September 2012  John Allison  (modeling-V09-05-11)
- G4ArrowModel.cc:
  o Added protection, limited width to length/50.

4th September 2012  John Allison  (modeling-V09-05-10)
- G4LogicalVolumeModel:
  o Added G4bool Validate(G4bool){return true;} - i.e., always valid.
  o Correct spelling of name.
- G4PhysicalVolumeModel.cc: Minor improvement to a message.

15th July 2012  John Allison  (modeling-V09-05-09)
- Introduced G4ArrowModel.
- G4AxesModel: Re-implemented (uses G4ArrowModel).

5th July 2012  Gabriele Cosmo  (modeling-V09-05-08)
- Explicitly use inclusion of headers for system of units and physical
  constants, in plan to remove implicit inclusion from globals.hh.

7th June 2012  John Allison  (modeling-V09-05-07)
- Shadow clean.

31st May 2012  John Allison  (modeling-V09-05-06)
- G4TrajectoryOriginVolumeFilter.cc:
  o Brought stray print statement under control of verbosity.
  o Fixes bug report 1310.

10th April 2012  John Allison  (modeling-V09-05-05)
- G4CallbackModel: It ws a bad idea to delete function in destructor
  (see 7th March).  OK to delete, but catastrophe when you try to use
  it a second time, for example, when model is replaced by same model.

4th April 2012  John Allison  (modeling-V09-05-04)
- Tagged.

30th March 2012  John Allison
- G4PhysicalVolumeModel.cc:
  o If top volume is a replica or a parameterised, only draw first one.

26th March 2012  John Allison
- G4VModel: Added Get/SetType. The sub-class should set its type,
  which could be the class name, or, in the case of G4CallBackModel,
  it could be the type of object it is coding.
- G4PhysicalVolumeModel: Added GetFullPVPath.

23rd March 2012  John Allison  (modeling-V09-05-03)
- G4AxesModel: Augmented global description to allow more than one
  set of axes to be added to scene if significantly different.

7th March 2012  John Allison  (modeling-V09-05-02)
- G4CallbackModel: Delete function in destructor.  (Good practice
  to delete all stuff created on the heap.)

3rd January 2012  John Allison  (modeling-V09-05-01)
- Tagged.

30th December 2011  John Allison
- G4PhysicalVolumeModel::Validate: Searches also in parallel worlds.

30th December 2011  John Allison  (modeling-V09-05-00)
- G4TrajectoriesModel::DescribeYourselfTo:
  o Used Begin/EndDraw to improve drawing speed.
  o Assumes all trajectories are drawn with the same transformation.
    If not, a fatal exception with be raised in G4VisManager::DrawT.

12th November 2011  John Allison
- G4AttributeFilterT<T>::AddInterval and AddValue:
  o Relaxed exception in case of already existing interval/value.
  o Changed from Fatal to JustWarning.
  o In that case, return with no action.

11th November 2011  John Allison  (modeling-V09-04-05)
- G4VTrajectoryModel.hh: Coverity fix.

30th October 2011  John Allison  (modeling-V09-04-04)
- G4ModelApplyCommandsT: Fixed compiler warning.
- G4PhysicalVolumeModel: Added flag to G4PhysicalVolumeNodeID: true if drawn.

27th September 2011  John Allison  (modeling-V09-04-03)
- G4PhysicalVolumeModel::Validate: Strengthen case for issuing warnings so
  that warning not issued in normal case.
- Added some files to svn::ignore.

25th September 2011  John Allison  (modeling-V09-04-02)
- G4PhysicalVolumeModel: Tidied

16th September 2011  John Allison
- Migrated to new G4Exception.

25th January 2011  John Allison  (modeling-V09-04-01)
- G4TrajectortDrawerUtils.cc:
  o Fixed unresolved reference.
  o Tidied.

27th December 2010  John Allison  (modeling-V09-04-00)
- Tagged.

11th December 2010  John Allison
- G4AttributeFilterT.hh, G4TrajectoryDrawByAttribute.cc:
  o Changed some exceptions from FatalError to JustWarnings.
- G4TrajectoryDrawerUtils.cc:
  o Rework TimesValidity.

14th November 2010  John Allison  (modeling-V09-03-05)
- G4TrajectoryDrawerUtils.cc:Fixed time-slicing problem.

5th November 2010  John Allison  (modeling-V09-03-04)
- G4PhysicalVolumeModel.cc: Fixed Coverity warning.

1st June 2010  John Allison  (modeling-V09-03-03)
- G4TrajectoryDrawByParticleID.cc: Set some defaults:
    Set("gamma", "green");
    Set("e-", "red");
    Set("e+", "blue");
    Set("pi+", "magenta");
    Set("pi-", "magenta");
    Set("proton", "cyan");
    Set("neutron", "yellow");

30th May 2010  John Allison  (modeling-V09-03-02)
- Added G4DigiModel and G4DigiFilterFactories.
- G4BoundingSphereScene, G4PhysicalVolumeMassScene,
  G4PhysicalVolumeSearchScene:
  o Added AddCompound(const G4VDigi&).

28th May 2010  John Allison  (modeling-V09-03-01)
- G4TrajectoryDrawByAttribute.cc, G4TrajectoryDrawByCharge.cc,
  G4TrajectoryDrawByOriginVolume.cc, G4TrajectoryDrawByParticleID.cc:
  o Fixed unused parameter 'i_mode' warning.

11th May 2010  John Allison  (modeling-V09-03-00)
- G4ModelingParameters, G4PhysicalVolumeModel:
  o Replace polyhedra with solids for sections and cutaways.
- G4TrajectoriesModel: Trap use of i_mode and print warning.
- G4VTrajectoryModel and derived classes G4TrajectoryDrawBy*:
  o Introduce Draw method *not* containing i_mode.
- G4TrajectoryDrawerUtils:
  o Remove default (0) for i_mode arguments.
  o Introduce functions without i_mode.
  o Comment out unused DrawLineAndPoints function.
  o Trap use of i_mode and print warning.

27th April 2010 Laurent Garnier
- G4trajectoryDrawerUtils :
  o Optimisation when drawing lines

4th November 2009  John Allison
- G4PSHitsModel:
  o Now intended as end-of-run model.
  o Picks up hits from G4ScoringManager instead of event.

22nd October 2009  John Allison  (modeling-V09-02-05 coworks greps-V09-02-02)
- Added G4PSHitsModel for gMocren driver.
- G4PhysicalVolumeModel.cc: Makes use of HepPolyhedronProcessor.

21st October 2009  John Allison  (modeling-V09-02-04 coworks greps-V09-02-02)
- G4BoundingSphereScene, G4PhysicalVolumeMassScene,
  G4PhysicalVolumeSearchScene:
  o Added empty AddCompound (const G4THitsMap<G4double>&) methods.

10th October 2009  John Allison  (modeling-V09-02-03)
- G4PhysicalVolumeModel: Added G4PhysicalVolumeModelTouchable.  Used in
  ComputeMaterial.  Effective for nested parameterisations.

29th September 2009  John Allison  (modeling-V09-02-02)
- G4PhysicalVolumeModel.cc: Added warning if logical volume not defined.

25th February 2009  John Allison  (modeling-V09-02-01 - needs greps-V09-02-01)
- G4ModelApplyCommandsT: Added visManager->NotifyHandlers() after
  application (Apply) of all commands.  Forces update of all viewers
  after a change of model, e.g., trajectory colour, point size, etc.

24th February 2009  John Allison  (modeling-V09-02-00 - needs greps-V09-02-00)
- Added setAux/StepPtsSizeType commands (candidates: "none world screen").
- Added unit to setAux/StepPtsSize for SizeType == world.

27th July 2008  John Allison  (modeling-V09-01-01)
- G4PhysicalVolumeSearchScene.cc: Cosmetic improvement to a message.

4th January 2008  John Allison  (modeling-V09-01-00)
- Adapted to new BeginPrimitives2D signature.

10th November 2007  John Allison  (modeling-V09-00-00)
- Minor improvement in warning message after change of geometry.

30th May 2007  John Allison  (modeling-V08-03-02)
- Removed warnedAboutIMode from G4TrajectoryDrawerUtils.hh.  It was
  used only in G4TrajectoryDrawerUtils.cc and gave warnings about
  being unused in other .cc files that inculded
  G4TrajectoryDrawerUtils.hh.  warnedAboutIMode is now a static in
  G4TrajectoryDrawerUtils.cc.

30th May 2007  John Allison  (modeling-V08-03-01)
- Fix for SUN.

22nd May 2007  John Allison  (modeling-V08-03-00)
- Simplified G4Atts for Physical Volume Path.

3rd April 2007  John Allison  (modeling-V08-02-02)
- G4PhysicalVolumeModel: Added full volume path information and
  transformed axes to G4Atts.

25th March 2007  John Allison  (modeling-V08-02-01)
- G4PhysicalVolumeModel: Added solid dump and volume transformation to G4Atts.

5th January 2007  John Allison  (modeling-V08-02-00 - needs greps-V08-02-00)
- G4PhysicalVolumeModel.cc: Bug fix:
  o Correct treatment of ForcedLineSegmentsPerCircle when clipping.

16th November 2006  John Allison  (modeling-V08-01-15)
- Added protection for parallel worlds (zero region pointer).

14th November 2006  John Allison  (modeling-V08-01-14)
- Merged modeling-V08-01-13-branch onto main branch.

8th November 2006  John Allison  (modeling-V08-01-13-00)
- On modeling-V08-01-13-branch.
- Added G4Event pointer to modeling parameters.
- G4TrajectoriesModel and G4HitsModel: use the above (G4VSceneHandler
  supplies).

5th November 2006  John Allison  (modeling-V08-01-13)
- Further, hopefully, complete, protection against zero materials pointer.

3rd November 2006  John Allison  (modeling-V08-01-12)
- G4PhysicalVolumeModel.cc: Protected against zero material pointer.

3rd November 2006  John Allison  (modeling-V08-01-11)
- G4Trajectories/HitsModel.cc: Protected against zero pointers from
  collections.

2nd November 2006  John Allison  (modeling-V08-01-10)
- G4HitsModel: Added GetCurrentHit.

1st November 2006  John Allison  (modeling-V08-01-09)
- G4VModel: Removed warning messages from the virtual functions
  GetCurrentDescription and GetCurrentTag so that there is no longer
  a message if the concrete class does not implement.  The implementation
  in G4VModel, which is used by default, is simply to return the global
  description and tag.
- Removed GetCurrentDescription and GetCurrentTag from models for which the
  concept of "current" makes no sense or is not used:
    G4AxesModel, G4HitsModel, G4LogicalVolumeModel, G4ScaleModel, G4TextModel.
- G4ModelCommandsT: Minor corrections to guidance.

26th October 2006  John Allison  (modeling-V08-01-08)
- G4PhysicalVolumeModel: Changed CreateAttValues to CreateCurrentAttValues.
- G4TrajectoriesModel: Added GetCurrentTrajectory.

------------------------------------------------------
19th September 2006  John Allison  (modeling-V08-01-07)
- G4ModelingParameters: Added ExplodeCentre
- G4PhysicalVolumeModel.cc: Programmed ExplodeCentre.

17th September 2006 Jane Tinslay
- Shift an assert from G4AttributeFilterT to G4AttFilterUtils - was
  causing problems with XCode 2.0

------------------------------------------------------
15th September 2006  John Allison  (modeling-V08-01-06)
- G4PhysicalVolumeModel.ccChanged "Bookkeeping" to "Physics

14th September 2006 Jane Tinslay
- Fixes for sun

13th September 2006  John Allison
- G4ModelingParameters: Improved setting and access to explode factor.
- G4PhysicalVolumeModel.cc: 
  o Implemented explode factor(radial move) feature for top level drawn
    volumes.
- G4TrajectoriesModel.cc: Improved debug checking and printing of G4Atts.
- G4ModelCommandUtils.hh, G4ModelCommandsT.hh:
  o  Re-instate setTimeSliceInterval command.

12th September 2006 Jane Tinslay
- Add attribute based trajectory drawing & filtering, and attribute based
  hit filtering

---------------------------------------------------
27th August 2006  John Allison  (modeling-V08-01-05)
- G4ModelingParameters: Added warning flag and section/cutaway polyhedron.
- G4PhysicalVolumeModel:
  o Acts on warning flag from G4ModelingParameters.
  o Added enum ClippingMode {subtraction, intersection};
  o Equipped for generic sectioning (DCUT) and cutaways.
- G4TrajectoryDrawerUtils::DrawWithTime:
  o Made use of G4VisAttributes time range.
  o Tidied.

26th August 2006  John Allison  (modeling-V08-01-04 - requires greps-V08-01-03)
- G4TrajectoryDrawerUtils.cc: Fixed compilation warning.

25th August 2006 Jane Tinslay
- Follow G4VFilter const change (requires greps-V08-01-03).

16th August 2006  John Allison  (modeling-V08-01-03)
- G4TrajectoryDrawerUtils.cc: Improved robustness of time slicing.
- G4ModelCommandsT.hh: In class G4ModelCmdSetTimeSliceInterval: 
  cmd->SetUnitCategory("Time").
- G4TrajectoriesModel.cc: Improved debug statement.

14th August 2006  John Allison  (modeling-V08-01-02)
- G4ModelApplyCommandsT.hh: Added G4ModelCmdApplyDoubleAndUnit.
- G4ModelCommandsT.hh: Added G4ModelCmdSetTimeSliceInterval.
- G4VisTrajContext: Added TimeSliceInterval.
- G4TrajectoryModelFactories: Instantiated G4ModelCmdSetTimeSliceInterval.
- G4TrajectoryDrawerUtils.cc: Added time slicing.

10th July 2006  John Allison  (modeling-V08-01-01)
- Co-works with greps-V08-01-01.
- G4VModel: Removed GetG4PhysicalVolumeModel.
- G4ModelingParameters:
  o Removed RepStyle, ViewGeom, ViewHits and ViewDigis (not used).
  o Reduced number of constructors.
- G4PhysicalVolumeModel:
  o Removed Establish/DecommissionSpecials to conform with greps-V08-01-01.
  o Rationalised G4Atts: Added GetAttDefs/CreateAttValues.

3rd July 2006  John Allison  (modeling-V08-01-00)
- Needs greps-V08-01-00.
- G4PhysicalVolumeModel::G4PhysicalVolumeNodeID: Added GetNonCulledDepth.
- G4PhysicalVolumeModel.cc: Also added G4Atts for solids.
- G4TrajectoriesModel.cc: Added debug code.

7th June 2006  John Allison (modeling-V08-00-14)
- G4PhysicalVolumeModel.cc: Added protection for zero vis atts.

6th June 2006  John Allison (modeling-V08-00-13)
- G4TrajectoryChargeFilter.cc: Added #include <sstream> for Sun compiler.
- G4PhysicalVolumeModel::Validate: Relaxed requirement for modeling parameters.
  (Caused crash after change of geometry.)

2nd June 2006 Joseph Perl (modeling-V08-00-12)
- G4VisTrajContext: change default of point sizes from 0 to 2

30th May 2006 Jane Tinslay
- Add G4TrajectoryChargeFilter and G4TrajectoryOriginVolumeFilter

25th May 2006  John Allison  (modeling-V08-00-11)
- G4VModelFactory.hh: Indent printing of models.
- G4ModelApplyCommandsT.hh: Fix trivial compiler warnings.

22nd May 2006  John Allison  (modeling-V08-00-10)
- Remove dependency on Run.
- G4ModelingParameters.cc: Protect operator<< for zero fpDefaultVisAttributes.

12th May 2006  John Allison  (modeling-V08-00-09)
- G4TrajectoriesModel and G4HitsModel: Removed dependency on G4RunManager.
  Uses G4RunManagerKernel.  Needs event-V08-00-01.
- G4CallbackModel: Added G4VGraphicsScene argument to operator().

4th May 2006  Joseph Perl  (modeling-V08-00-08)
- Add missing assert to G4VTrajectoryModel needed by Windows.

4th May 2006  John Allison
- Improved protection for null models and parameters.

2nd May 2006 Jane Tinslay
- Add context to trajectory drawers. Intended to replace imode. 
  Allows to configure default drawing style for lines, step and 
  auxiliary points. For example, colours, visibility, point sizes, 
  fill styles..
- Add generic drawer, G4TrajectoryGenericDrawer. Draws all trajectories 
  in the same style, based on its default context.
- Update generic commands
- Add verbose to drawers

21st April 2006 Jane Tinslay  (modeling-V08-00-07)
- Get rid of some warning messages from G4ModelCommandsT 
  when compiling on Linux
- Add Print method to G4VModelFactory

19th April 2006  John Allison  (modeling-V08-00-06 - needs greps-V08-00-02)
- G4BoundingSphereScene.hh, G4PhysicalVolumeMassScene.hh and
  G4PhysicalVolumeSearchScene.hh;  Added dummy Begin/EndPrimitives2D
  for greps-V08-00-02.
- G4PhysicalVolumeModel.cc: Improved legibility and efficiency of
  culling algorithm.

28th March 2006 Jane Tinslay (jst28032006)
- Add G4TrajectoryFilterFactories and G4TrajectoryParticleFilter
  for trajectory filtering. 
- Add more generic commands to G4ModelCommandsT

28th March 2006  John Allison (modeling-V08-00-05)
- G4PhysicalVolumeMassScene and G4PhysicalVolumeSearchScene:
  o Removed EstablishSpecials.
- G4PhysicalVolumeModel:
  o GetTopPhysicalVolume, GetCurrentPV, GetCurrentLV,
    GetCurrentMaterial: return non-const pointers.  (It has proved
    impossibly difficult to deal with const pointers.)
  o Modified for new G4PhysicalVolumeSearchScene constructor.
- G4BoundingSphereScene: Removed use of GetG4PhysicalVolumeModel (uses
  dynamic cast instead).

24th March 2006 Jane Tinslay (jst24032006)
- Add G4bool visibility parameter to trajectory draw 
  models "Draw" method.
 
16th March 2006 Jane Tinslay (jst16032006)
- Template commands and colour map used in trajectory models
- Introduce G4TrajectoryDrawByOriginVolume

14th March 2006  John Allison (modeling-V08-00-04)
- G4PhysicalVolumeModel::G4PhysicalVolumeNodeID: Added output operator<<.

16th February 2006  John Allison (modeling-V08-00-03)
- G4PhysicalVolumeModel: Minor enhancements to facilitate future
  removal of Establish/DecommisionSpecials.

8th February 2006  John Allison (modeling-V08-00-02)
- Added DrawingStyle to G4ModelingParameters.
- G4PhysicalVolumeModel: Fixed bug in culling of covered daughters and
  improved readability of culling algorithm.

26th January 2006  John Allison (modeling-V08-00-01)
- G4PhysicalVolumeModel: Added capability of maintaining path of the
  current drawn (non-culled) volume in terms of drawn (non-culled)
  ancesters.  See G4PhysicalVolumeModel.hh for detailed description.
- Removed some unnecessary data members and other small tidying.

11th January 2006  John Allison (modeling-V08-00-00)
- G4NullModel.cc: Changed G4Transform3D::Identity to G4Transform3D().

2nd December 2005  Joseph Perl (modeling-V07-01-07)
- Change "G4String inline" to "inline G4String" to correct compiler
  warning in G4VTrajectoryModel.hh.

30th November 2005  Gabriele Cosmo (modeling-V07-01-06)
- Trivial fix to G4VModel for support of CLHEP-2.0.X series.

28th November 2005  Jane Tinslay
- Remove names of unused parameters to stop compiler warnings

24th November 2005  John Allison (modeling-V07-01-05)
- Set initial values for originalRMin, originalRMax to satisfy compiler

23rd November 2005  Joseph Perl  (modeling-V07-01-04)
- Tagged in preparation for Geant4 8.0

23rd November 2005 Jane Tinslay
- Enhanced trajectory implementation

22nd November 2005  John Allison (modeling-V07-01-03)
- Implemented radial replicas for G4Tubs.
- Changed G4Transform3D::Identity to G4Transform3D().

24th October 2005  John Allison (modeling-V07-01-02)
- Added: G4VTrajectoryModel, G4VTrajectoryModelMaker, G4TrajectoryModelMaker
  and G4TrajectoryTestModel.
- G4VModel: cosmetic changes.

13th October 2005  John Allison (modeling-V07-01-01)
- Migrated to <sstream>.

13th September 2005  John Allison (modeling-V07-01-00)
- Fixed (non-)culling of transparent volumes.

7th June 2005  John Allison (modeling-V07-00-02)
- G4PhysicalVolumeModel: fixed case of off-origin volume.
- G4TextModel: Further small improvement.

31st May 2005  John Allison  (modeling-V07-00-01)
- G4TextModel: Improved global tag for better identification.

6th May 2005  John Allison  (modeling-V07-00-00)
- G4PhysicalVolumeModel: SetCopyNo of replicas and paramaterised volumes.

3rd March 2005  John Allison  (vis-V07-00-08)
- Added Set methods to G4VModel.
- Added argument to G4CallbackModel::operator()(const G4Transform3D&) so that
  the model could implement a given transformation.  Provided default for
  G4VUserVisAction::(const G4Transform3D& = G4Transform3D::Identity).

11th November 2004  John Allison  (vis-V06-02-05)
- Made use use of smart method GetPolyhedron for solids.  This greatly
  speeds 2nd and subsequent drawings when kernel access is required.

22nd September 2004  John Allison  (modeling-V06-02-01)
- Changed use of deprecated G4VPhysicalVolume::GetRotation to GetRotationValue.
- Fixed memory leak in G4PhysicalVolumeMassScene.

13th September 2004  John Allison  (modeling-V06-02-00)
- Added G4PhysicalVolumeMassScene.  From the header file:
// Calculates the mass of a geometry tree taking into account daughters
// up to the depth specified in the G4PhysicalVolumeModel.  Culling is
// ignored so that all volumes are seen.
//
// The calculation is quite tricky, since it involves subtracting the
// mass of that part of the mother that is occupied by each daughter and
// then adding the mass of the daughter, and so on down the heirarchy.
//
// Usage for a given G4PhysicalVolumeModel* pvModel:
//   G4PhysicalVolumeMassScene massScene;
//   massScene.EstablishSpecials (*pvModel);
//   pvModel->DescribeYourselfTo (massScene);
//   G4double volume = massScene.GetVolume();
//   G4double mass = massScene.GetMass();
//   massScene.Reset();
// See, for example, G4ASCIITreeSceneHandler::EndModeling().
- Added some access functions to G4PhysicalVolumeModel:
    GetTopPhysicalVolume, GetRequestedDepth, SetRequestedDepth.
- Protected GetPhysicalVolumeModel when all volumes "invisible".

12th November 2003  John Allison  (modeling-V05-02-02)
- CalculateExtent always searches complete hierarchy.

6th November 2003  John Allison  (modeling-V05-02-01, vis-V05-02-03)
- GNUmakefile: rationalised.

3rd November 2003  Gabriele Cosmo  (modeling-V05-02-00, vis-V05-02-02)
- Added inclusion of G4VSolid.hh in G4LogicalVolumeModel.cc to make it self
  consistent after header review in geometry category.

4th October 2003  Gabriele Cosmo  (vis-V05-02-01)
- GNUmakefile:
  o added dependency to new module "geometry/navigation".
  o replaced "digits+hits" with "digits_hits".
- Coworks with "geometry-V05-02-00" and "digits_hits-V05-02-00".

22nd September 2003  John Allison  (vis-V05-02-00, greps-V05-02-00)
- Removed a redundant comment.

20th November 2002  Gabriele Cosmo  (modeling-V04-01-00)
- Fixed access to static data (requires "greps-V04-01-04") in
  G4FlavoredParallelWorldModel.cc, to allow porting on Windows DLLs.

11th November 2002  John Allison  (modeling-V04-00-00)
- Added fDrawingMode data member to G4TrajectoriesModel.

24th October 2002  John Allison (vis-V04-01-03)
- Changes for AddThis(const G4VTrajectory&) and (const G4VHit&).

23rd February 2002  John Allison (vis-V04-00-02)
- Removed Begin/EndPrimitives from G4HitsModel and
  G4TrajectoriesModel.  This was causing nested calls to
  Begin/EndPrimitives (and thus to glNewList/EndList in OpenGL stored
  mode), since the trajectories and hits Draw methods themselves have
  Begin/EndPrimitives.

24th August 2001  John Allison  (vis-V03-02-13)
- Intoduced argument for printing in G4VModel::Validate(G4bool warn).
- Changed default return value in G4VModel::Validate(G4bool) to true.
- Invoke CalculateExtent after successful geometry change in
  G4PhysicalVolumeModel::Validate, and other bug fixes..

14th August 2001  John Allison  (vis-V03-02-11)
- Added sceneHandler.Begin/EndPrimitives messages to models (long
  standing bug!).

9th August 2001  John Allison  (vis-V03-02-10-00)
- Removed G4ModelingParameters::hierarchy.  It is no longer used.  The
  textual or graphical representation of the geometry hierarchy is now
  done in G4xxxTree classes in visua;ization/Tree.

25th July 2001  John Allison  (modeling-V03-02-03)
- Added G4VModel::GetG4PhysicalVolumeModel().
- Added G4VModel* argument to G4BoundingSphereScene constructor.
  Both the above are to facilitate access to a model, if it exists, and
  to invoke methods of G4PhysicalVolumeModel if it is one.
- Added code to curtail G4PhysicalVolumeModel search in G4BoundingSphereScene.

24th July 2001  John Allison  (modeling-V03-02-02)
- Added G4VModel::SetExtent(const G4VisExtent&).
- Cosmetic improvements to G4BoundingSphereScene.
- Augmented G4ScaleModel::fGlobalTag.

21st July 2001  John Allison  (modeling-V03-02-01)
- Added G4ScaleModel.
- Fixed bug in G4BoundingSphereScene::::Accrue().
- Also a few cosmetic changes.

18th July 2001  John Allison  (modeling-V03-02-00)
- Ensured rotation and translation of replica is restored.

3rd February 2001  John Allison  (vis-V03-00-02)
- Tidied for CodeWizard.

29th May 2000  John Allison
- Moved code for maintaining depth, physical and logical volume
  pointers from VisitGeometryAndGetVisReps to DescribeAndDescend to
  handle daughters of replicas correctly (Guy Barrand).

22nd May 2000  John Allison  (modeling-V01-01-00)
- Added G4VTreeGraphicsScene (DTREE).
- Commented out pVPV->SetCopyNo(n) on Makoto's advice in
  G4PhysicalVolumeModel.cc.

vis-V01-01-01  12th April 2000  John Allison
- Made G4PhysicalVolumeModel::DescribeSolid virtual.
- G4PhysicalVolumeModel::DescribeSolid no longer deals with composite
  solids - now programmed into CompositeSolid::CreatePolyhedron, where
  CompositeSolid means G4IntersectionSolid, G4SubtractionSolid and
  G4UnionSolid.
- G4PhysicalVolumeModel::DescribeSolid no longer deals with displaced
  solids - now programmed into G4DisplacedSolid::CreatePolyhedron.
- Added G4LogicalVolumeModel::DescribeSolid, which explicitly adds
  components of composite solids as white forced-wireframe objects.

vis-V00-01-10  25th November 1999  John Allison
- Adapted header files of modeling for Software Reference Manual.

vis-01-00-05  7th February 1999  John Allison

vis-01-00-05  7th February 1999  John Allison
- Added list facility to G4PhysicalVolumeSearchScene.
- Added virtual functions AddThis (const G4Polycone and G4Polyhedra to
  G4BoundingSphereScene and G4PhysicalVolumeSearchScene.

vis-00-04-01  25th November 1998  John Allison.
- Added const G4VisAttributes* fpDefaultVisAttributes and access
  functions to G4ModelingParameters.
- Reverted to default assignment operator and copy constructor for
  G4ModelingParameters.
- G4PhysicalVolumeModel can now handle invisible daughters.

31st August 1998  John Allison
- Added G4VModel::Validate() and in subclasses.

vis-00-02-05  27th August 1998  John Allison
- Added G4HitsModel and G4TrajectoriesModel.

vis-00-02-04  22nd August 1998  John Allison
- Made G4Transform3D fTransform a member of G4VModel (instead of pointer).
- Reversed order of parameters in G4VModel constructor.
- Much bug fixing.

vis-00-06-06  11th June 1998  John Allison
- G4PhysicalVolumeModel handles parametrised solids and materials.

vis-00-06-04  10th June 1998  John Allison
- Moved G4BoundingSphereScene from management to modeling.
- Added G4Transform3D data member.

modeling-00-04-01  4th March 1998  John Allison
- Last tag before moving to visualization.
- Removed G4ModelingParameters:: from G4ModelingParameters.hh constructor.

27th January 1998  John Allison
- New (temporay?) category.
- Incorporates modeling code which was in G4VScene.