$Id: History,v 1.21 2002/05/08 13:51:26 johna Exp $
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     =========================================================
     Geant4 - an Object-Oriented Toolkit for Simulation in HEP
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                      Sub-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 directory-tags.
It DOES NOT substitute the  CVS log-message one should put at every
committal in the CVS repository !

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

08-May-2002, J.Allison (geom-solids-specific-V04-00-01)
- Implemented G4EllipticalTube::CreatePolyhedron.

10-Jan-2002, G.Cosmo (geom-solids-specific-V04-00-00)
- Updated unit tests.

20-Apr-2001, G.Cosmo (geom-solids-specific-V03-01-00)
- Migration to STL vector:
  o In G4ClippablePolygon, migrated G4ThreeVectorList typedef and
    made private to class.
    
03-Apr-2001, D.Williams  (geom-solids-specific-V03-00-01)
-----------------------
- G4IntersectingCone.cc: make small adjustment to help with roundoff error
  in LineHitsCone1() and LineHitsCone2().

08-Jan-2001, D.Williams  (geom-solids-specific-V03-00-00)
-----------------------
- G4Hype.cc: Added protecton against zero v.z in DistanceToOut.

20-Nov-2000, G.Cosmo     (geom-solids-specific-V02-00-04)
---------------------
- Fixes to remove warnings from "-Wall -ansi -pedantic" g++ compiler options:
  o commented out variables declared and not used.
  o fixed declaration of variables used before being initialised.
  o fixed order of initialisation of member data in constructors.
  o fixed usage of unsigned-int (size_t) for array indeces.

13-Nov-2000, G.Cosmo     (geom-solids-specific-V02-00-03)
--------------------
- Added definition of empty constructor for G4ClippablePolygon which
  went lost by mistake...

02-Nov-2000, G.Cosmo     (geom-solids-specific-V02-00-02)
--------------------
- QA code revision and cleanup (+fixes from CodeWizard filtering):
  o Avoid inline virtual methods.
  o General cosmetics for Software Reference Manual.

23-Oct-2000, D.Williams  (geom-solids-specific-V02-00-01)
-----------------------
- G4IntersectingCone.cc: the check for a zero radical has been adjusted to be
  less sensitive to round off error in LineHitsCone1(), LineHitsCone2().
  This fixes a problem discovered in BaBar.

12-Sep-2000, G.Cosmo  (geom-solids-specific-V02-00-00)
--------------------
- Organised comments to headers for Software Reference Manual.

27-Jun-2000, G.Cosmo  (geom-solids-specific-V01-01-02)
--------------------
- G4Polycone[.hh.cc]: better fix for bug-report #110.
  Removed struct and replaced with class.

26-Jun-2000, G.Cosmo  (geom-solids-specific-V01-01-01)
--------------------
- G4Polycone.cc: fixed memory leak by invoking destruction of member
  enclosingCylinder, which was not cleaned up in the destructor.
  This fixes problem report #107.
- G4Polycone.hh: added forward declaration of struct G4PolyconeHistorical
  and made it friend, for porting on KCC --strict. This fixes report #110.
- G4Polyhedra.hh: fixed typo in method name. Changed GetNumSIde() to
  GetNumSide(). This fixes problem report #105.

08-Jun-2000, G.Gracia
---------------------
- G4VCSGfaceted.cc: fix for Win/NT in function GetExtent().

27-Apr-2000, G.Cosmo
--------------------
- Removed dependency over the CSG domain in GNUmakefile.

18-Apr-2000, D.Williams
-----------------------
- Removed meaningless "const" specifiers from methods in G4ClippablePolygon,
  and G4EllipticalTube.
- G4EllipticalTube, G4Hype and G4VCSGfaceted now inherit directly
  from G4VSolid (before was G4CSGSolid).
- Reintroduced GetExtent() in G4EllipticalTube, G4Hype and G4VCSGfaceted
  (in principle, not needed).
- Modified assertations in unit test testG4Hype.cc.

11-Apr-2000, J.Allison
----------------------
- Removed implementations of GetExtent in most sub-classes of G4VSolid (a
  default implementation exists in G4VSolid).
- All implementations of DescribeYourselfTo (G4VGraphicsScene& scene) const
  now correctly written: scene.AddThis(*this).

05-Apr-2000, G.Cosmo   (geom-solids-specific-V01-01-00)
--------------------
- Restructured solids/CSG domain, by moving to "specific" the following
  classes: G4ClippablePolygon, G4EnclosingCylinder, G4Hype, G4PolyPhiFace,
  G4Polycone, G4PolyconeSide, G4Polyhedra, G4PolyhedraSide, G4ReduciblePolygon,
  G4IntersectingCone, G4SolidExtentList, G4VCSGface, G4VCSGfaceted.
  The new module's library for "specific" is now called 'G4specsolids'.
- Created specific/test directory and moved testG4Hype.cc and testG4Polycone,cc
  from CSG/test.
- Organised class description comments for the Software Reference Manual
  and added CVS headers to files.

29-Mar-2000, D.Williams
-----------------------
- Added first implementation of G4EllipticalTube.
  It defines a simple elliptical tube, as in geant3 "ELTU".
  Files introduced: G4EllipticalTube[.hh.cc].

25-Mar-2000, G.Cosmo
--------------------
- History file created.
