$Id: History,v 1.121 2010/06/01 21:49:49 allison Exp $
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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
---------------------------------------

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.
