$Id: History,v 1.119 2009/11/30 10:20:53 gcosmo Exp $
-------------------------------------------------------------------

     =========================================================
     Geant4 - an Object-Oriented Toolkit for Simulation in HEP
     =========================================================

                      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 !

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

Nov 30, 2009  V.Grichine                 geom-csg-V09-02-08
- G4Orb: moved debug warning in DistanceToIn(p,v) within G4CSGDEBUG flag.

Nov 26, 2009  T.Nikitina                 geom-csg-V09-02-07
- G4Torus: fix in SolveNumericJT() in order to take in account the difference
  in the value of theta for different intervals, [0:pi] or [-pi:0], and for
  SPhi in [0:twopi] or [-twopi:0]. Addresses problem report #1086.

Nov 12, 2009  T.Nikitina                 geom-csg-V09-02-06
- G4Cons: fix to DistanceToIn(p,v), added a check on the direction in case 
  of point on surface. Fixes a problem of stuck tracks observed in CMS, due
  to wrong reply from the solid for points on the inner radius surface base
  with direction along the imaginary extension of the cone.
- Added test case to internal test testG4Cons2.

Aug 07, 2009  T.Nikitina                 geom-csg-V09-02-05
- G4Sphere: fix for the calculation of the normal in DistanceToOut()
  to avoid cases of division by zero in specific configurations.
  Addresses problem report #977.

Jun 30, 2009  T.Nikitina                 geom-csg-V09-02-04
- Introduced to DistanceToIn(p,v) splitting of the distance for point very far
  from intersection area and big difference between solid dimensions and
  distance to it; resolves issue observed on 64 bits problem. Affected solids:
  G4Tubs, G4Cons, G4Sphere, G4Orb. Addresses problem report #1022.
- Fixed rare cases of NaN on G4Sphere.

Jun 09, 2009  G.Cosmo                    geom-csg-V09-02-03
- Fixed case of non-initialised start-Phi value in G4Tubs and G4Cons,
  problem introduced following modifications in tag "geom-csg-V09-02-00".

May 14, 2009  T.Nikitina                 geom-csg-V09-02-02
- G4Sphere: initialise flags for full sphere in constructor.

May 14, 2009  T.Nikitina                 geom-csg-V09-02-01
- G4Sphere: correction di DistanceToOut(p,v, ...) for phi sections for
  rays passing though zero.
- More minor refiniments to G4Sphere following review.

May 08, 2009  G.Cosmo                    geom-csg-V09-02-00
- G4Sphere: implemented speed improvements and corrections from joint
  code review of G4Sphere class. Cached computation for half-tolerances
  and use of Boolean flag for identifying if full-sphere, shell or section.
  Implemented caching of trigonometric values, now directly computed inside
  modifiers for Phi and Theta angles as required for parametrised cases.
  Rationalised usage of relative radial tolerances.
- G4Tubs, G4Cons: rationalised usage of modifiers for Phi angles and
  simplified constructors.
- Added new test case for relatively big spheres in unit tests testG4Orb
  and testG4Sphere, based on problem report #1046.

Nov 21, 2008  G.Cosmo                    geom-csg-V09-01-08
- G4Sphere: defined Get/SetInnerRadius() accessors to be compliant with
  other CSG solids and allow consistent treatment in persistency code...

Nov 06, 2008  G.Cosmo                    geom-csg-V09-01-07
- G4Tubs, G4Cons: implemented caching of trigonometric values, now directly
  computed inside modifiers for Phi angles and required for parametrised
  cases. Improvement bringing up to 20% speedup in normal tracking for
  tube/cone-sections placements.

Nov 05, 2008  G.Cosmo                    geom-csg-V09-01-06
- G4Cons: implemented first speed improvements and corrections from joint
  code review of G4Cons class. Cached computation for half-tolerance and
  use of Boolean flag for identifying if full-cone or section.
- G4Tubs: more refinements to previous review; corrected implementation
  of constructor to conform to implementation as in G4Cons. Fixed issue in
  SetDeltaPhi() method after changes introduced in the previous tag.

Sep 18, 2008  T.Nikitina                 geom-csg-V09-01-05
- G4Tubs: implemented first speed improvements and corrections from joint
  code review of G4Tubs class. Cached computation for half-tolerance and
  use of Boolean flag for identifying if full-tube or section.

Jul 07, 2008  V.Grichine                 geom-csg-V09-01-04
- G4Sphere: fixed bug in DistanceToOut(p, v, ...) for normal 'fSTheta'
  greater than 90*deg, and use of tangent giving negative value.
  Completes series of corrections introduced in previous tag.

Jun 23, 2008  T.Nikitina                 geom-csg-V09-01-03
- G4Tubs: fix in DistanceToIn(p,v, ...) in case of point on surface with
  very small tangent direction; now returning kInfinity and no longer zero.
  It fixes rare observed cases of zero value returned by both DistanceToIn()
  and DistanceToOut(), causing stuck tracks with zero step length.

Jun 20, 2008  V.Grichine
- G4Sphere: fixed calculation of roots in DistanceToOut(p,v,...) for
  theta-conical surfaces interserctions and for sTheta<=90 degree intersection.
  Addresses issue reported when running PET application with optical photons
  about mis-computation of distance on half-sphere constructs.
- Updated unit test for sphere.

Apr 22, 2008  V.Grichine                 geom-csg-V09-01-02
- G4Trap: corrections for arithmetic operations in 8-point constructor.
  Addressing problem report #934.

Mar 13, 2008  G.Cosmo                    geom-csg-V09-01-01
- Cleared compilation warnings in G4Sphere on gcc-4.3.0 for
  ambiguous use of parentheses in condition statements.

Feb 20, 2008  T.Nikitina                 geom-csg-V09-01-00
- G4Cons:
  o Added protection against NaN in GetPointOnSurface() in the case the
    check is run for Rmax1==Rmax2.

Nov 23, 2007  T.Nikitina                 geom-csg-V09-00-02
- Fixed problem of undefined side for valid surface normal in case of Phi
  section and direction through the center of either A G4Tubs or G4Cons shape.

Oct 2, 2007  T.Nikitina                  geom-csg-V09-00-01
- G4Torus:
  o Fixed bug in CalculateExtent() for case of non-rotated full-phi
    torus definition: added protection against negative value for sqrt()
    and corrected formula for 'delta'. Fixes problem of NaN detected in
    initialisation by CMS.
  o Fixed bug in SolveNumericJT(): corrected handling of complex roots,
    'rootsrefined' is used only if the number of refined roots is the same
    as for primary roots. Addresses problem report #969.

Aug 16, 2007  T.Nikitina                 geom-csg-V09-00-00
- G4Tubs: fixed bug in DistanceToOut(p,v,..) for negative value under sqrt()
  for the case of point p on the surface and v tangent to the surface.
  Responsible for rare cases of NaN.

May 18, 2007  G.Cosmo                    geom-csg-V08-03-01
- Use kAngTolerance and kRadTolerance from G4GeometryTolerance class.
- Coworks with tag "global-V08-03-03".

May 16, 2007  T.Nikitina                 geom-csg-V08-03-00          
- G4Tubs: fixed bug for DistanceToOut(p,v) for phi section.
  Bug was causing segmentation fault in recursive_test (problem report #784). 
  For v crossing the center of the tub DistanceToOut was always giving
  Radial distance and not distance in Phi.  
- G4Cons: fixed bug for DistanceToOut(p,v) for phi section,
  the same as for G4Tubs. 
- Updated unit tests.

Oct 19, 2006  G.Cosmo                    geom-csg-V08-01-00
- Added explicit computation for GetSurfaceArea() for all solids
  (by H.Dierckx).
- Implemented caching mechanism for computation of surface area in
  G4CSGSolid, as done for the geometrical volume computation.

Jun 06, 2006  V.Grichine                 geom-csg-V08-00-01
- G4Tubs: added protection against NaNs in CalculateExtent() to avoid
  sqrt() of negative numbers due to round-off.
- Updated unit tests testG4Sphere and testDistanceAccuracy.

Jan 16, 2006  V.Grichine                 geom-csg-V08-00-00
- G4Sphere: fixed bug in DistanceToOut() for theta intersections.

Nov 20, 2005  V.Grichine                 geom-csg-V07-01-05
- G4Torus: fixed bug in Inside(p) for phi sections.
  Fixes problem report #810.

Nov 9, 2005  G.Cosmo                     geom-csg-V07-01-04
- Added fake default constructor for all concrete solids and relevant
  utility classes, for usage of direct object persistency.
- Implemented changes to support CLHEP-2.0.X for explicit usage of the
  CLHEP/HepGeom namespaces for CLHEP types.

Oct 23, 2005  V.Grichine                 geom-csg-V07-01-03
- G4Para: fixed bug in DistanceToOut(p,v) for the case v.x()<0.
  Following problem report from user posted on Hypernews (#452).

Sep 5, 2005  O.Link                      geom-csg-V07-01-02
- Moved implementation for DistanceToIn/Out() in G4Torus to make use of
  G4JTPolynomialSolver for precise calculation of the intersections.
- Reviewed unit tests and reduced statistics.

Aug 8, 2005  D.Anninos                   geom-csg-V07-01-01
- Added GetPointOnSurface() to all solids. The method returns a random
  point according to a quasi-uniform distribution along the surface.

Jul 25, 2005  O.Link                     geom-csg-V07-01-00
- Fixed bug in G4Sphere::DistanceToOut(p,v):
  added check for intersection with double cone.
- Added new unit test testDistanceAccuracy (V.Grichine).

Jun 8, 2005  V.Grichine                  geom-csg-V07-00-09
- Keep old specification for SurfaceNormal() to treat usage of the
  function for points not at the surface.

Jun 6, 2005  V.Grichine                  geom-csg-V07-00-08
- Correction to SurfaceNormal() for G4Cons, G4Sphere, G4Torus, G4Tubs
  for properly handling location on z-axis and in the frame origin.
  Fixed bug in G4Cons::SurfaceNormal(p) for normals returned from
  rmax and rmin.
- Moved debug printouts for surface-normals to G4CSGDEBUG.
- Cleared compilation warnings in unit tests and updates.

May 27, 2005  J.Allison                  geom-csg-V07-00-07
- Fixed polyhedron representation of G4Torus.

May 26, 2005  G.Cosmo                    geom-csg-V07-00-06
- G4Box.cc: restored call to AddSolid() and replaced old AddThis() in
  DescribeYourselfTo().

May 11, 2005  V.Grichine                 geom-csg-V07-00-05
- G4Para: bug fixed in SurfaceNormal(p) for x-distance, to be now in
  accordance with the surface selection using Inside(p).
- Updated unit test testSurfaceNormal.cc.

May 09, 2005  V.Grichine                 geom-csg-V07-00-04
- Updated implementation of SurfaceNormal(p) to get consistence with 
  Inside(p) functions for the treatment of phi/theta surfaces.
  They are treated now in both functions in terms of kAngTolerance.
  The reason is that historically SurfaceNormal(p) was using only
  kCarTolerance for estimation of shortest distance to a surface. Now,
  following the new updated specification, the surface selection is made
  according to Inside(p) approach (as kSurface is selected), i.e. - for
  phi/theta surfaces in terms of kAngTolerance.

Apr 26, 2005  V.Grichine, J.Apostolakis
- Simplified and revised the new implementation for SurfaceNormal(p)
  with edges/vertices and made becoming the default one for all solids.

Apr 20, 2005  V.Grichine                 geom-csg-V07-00-03
- G4Trap: fix in p.x() centering to sum over all vertices.

Mar 23, 2005  J.Allison                  geom-csg-V07-00-02
- Added test for Number-Of-Rotation-Steps in G4CSGSolid::GetPolyhedron().
  Requires tag "greps-V07-00-02".

Mar 03, 2005  J.Allison                  geom-csg-V07-00-01
- Changed AddThis() with AddSolid() for all solids in DescribeYourselfTo()
  implementation.

Dec 02, 2004  V.Grichine                 geom-csg-V07-00-00
- New alternative implementation of SurfaceNormal(p) with edges/vertices
  for G4Box, G4Para, G4Trap, G4Trd. Old implementation is still the default.
  Can be activated by setting G4NEW_SURF_NORMAL variable before compilation.

Nov 15, 2004  V.Grichine                 geom-csg-V06-02-06
- G4Trap: added check for X-centering for constructor by verteces.
  Fixes problem report #687.
- New unit test for surface-normal and updated unit tests for sphere
  and trap.

Oct 10, 2004  J.Allison                  geom-csg-V06-02-05
- Added GetPolyhedron, a smart access function that creates a G4Polyhedron
  on request and stores for future access.  A null pointer means "not
  available".

Sep 22, 2004  V.Grichine                 geom-csg-V06-02-04
- Added specific implementation of GetCubicVolume() for all CSG solids.
  The method compute the exact geometrical values and stores it.
  The value is reset each time a parameter of the solid is modified.
- Moved inline methods for G4Orb to .icc file.
- Added unit test testSurfaceInOut.cc.

Sep 16, 2004  V.Grichine                 geom-csg-V06-02-03
- Bug fix in G4Sphere::SurfaceNormal(p) for theta normals.

Jul 28, 2004  V.Grichine                 geom-csg-V06-02-02
- Fix in G4Cons::DistanceToIn(p,v) on fRmax surface and move in,
  the condition became a bit more strict && determinant >=0, i.e.
  intersections in addition to go in.
  Fixes a rare problem of dIn=dOut=0 observed in 3 events over a
  statistics of 10^8..
- Updated unit test testSurfaceInOut.cc to consider the test-case above.

Jul 16, 2004  V.Grichine                 geom-csg-V06-02-01
- Fix in G4Sphere::DistanceToOut(p,v,...) on fRmin moving outside.
  The bug showed 3 events of dIn=dOut=0 for 10^7 statistics in
  testSurfaceInOut.
- Added new unit test testSurfaceInOut.cc.

Jul 02, 2004  V.Grichine                 geom-csg-V06-02-00
- Fixes curing rare conditions of loops at boundaries for G4Orb and G4Sphere:
  o G4Orb.cc: bug fix in DistanceToIn(p,v) on fRmax surface allowing
    move near fRmax-fCarTolerance/2.
  o G4Sphere.cc: bug fix in DistanceToIn(p,v) on Rmax/min surface for
    condition of intersection with (Rmax/min-kCarTolerance) artificial
    surface.
- Updated unit test for G4Orb.

Mar 18, 2004  V.Grichine                 geom-csg-V06-00-01
- G4Torus.cc: bug fix in Inside(p) fixing warnings reported in
  debug-mode of 'point p is outside'.

Jan 26, 2004  V.Grichine                 geom-csg-V06-00-00
- Converted strong exceptions in warning notifications for rare anomalous
  conditions in DistanceToOut(p,v,..).
- G4Cons.cc: bug fix in DistanceToIn(p,v) to resolve situations of calls
  to DistanceToOut() for points outside.

Dec 4, 2003   V.Grichine                 geom-csg-V05-02-06
- G4Trap.cc: fixed initialisation of planes in default constructor.
- Added new unit test for G4Sphere and new test case for G4Cons.

Nov 5, 2003   V.Grichine                 geom-csg-V05-02-05
- G4Orb[.hh.cc]: introduced relative tolerance accuracy on fRmax surface
  in all methods.

Nov 3, 2003   G.Cosmo                    geom-csg-V05-02-04
- Code cleanup and headers inclusion review
  (replaced by forward declarations where necessary).

Nov 2, 2003   V.Grichine
- G4Sphere, G4Orb: revision of algorithm for Phi sections in
  method Inside().

Oct 29, 2003   J.Apostolakis             geom-csg-V05-02-03
- G4Sphere.cc: fix for in Inside() for a point with Phi angle:
  0.5 kAngTol < phi < Phi_start

Oct 28, 2003   G.Cosmo                   geom-csg-V05-02-02
- Migrated to new G4Exception scheme.

Oct 09, 2003   V.Grichine                geom-csg-V05-02-01
- Initialise safe=0.0 in DistanceToIn/Out(p) in all solids.
- Introduced G4Orb solid: a simple sphere with only outer radius.

Sep 30, 2003   G.Cosmo                   geom-csg-V05-02-00
- Updated GNUmakefile for unit tests, according to new structure
  introduced in "geometry-V05-02-00".

Jun 25, 2003   G.Folger                  geom-csg-V05-01-00
- Added disclaimer of liability where needed.

Feb 03, 2003   G.Cosmo                   geom-csg-V05-00-00
- G4Cons.cc: enhanced treatment of phi-sections,
  according to algorithm used also in G4Tubs (V.Grichine).
- Updated unit tests.

Oct 28, 2002   G.Cosmo                   geom-csg-V04-01-01
- Added implementation of StreamInfo() to comply with new interface for
  G4VSolid in "geommng-V04-01-03".
- Moved inline functions to .icc files, reorganised comments for the Software
  Reference Manual.
- Some cosmetic changes to code formatting, removed all <TAB> characters and
  adopted uniform code indentation.
- Extended unit tests for G4Cons and G4Sphere (V.Grichine).

Jun 26, 2002   V.Grichine                geom-csg-V04-01-00
- G4Cons.cc: bug fixed in DistanceToIn(p,v) concerning z-crossing at the
  edge with Rmin,Rmax.

Jun 19, 2002   V.Grichine                geom-csg-V04-00-05
- G4Sphere.cc: bug fixed in Inside() for treatment of point p on z-axis.
  Added new condition [(rho2 || p.z()) && fDTheta < M_PI - kAngTolerance*0.5)]
  for treating special case. Fixes problem report #378.

May 15, 2002   G.Cosmo                   geom-csg-V04-00-04
- G4Trap.cc, G4Tubs.cc: changed local enum 'kUndefined' to 'kUndef',
  to co-work with tag "global-V04-00-06", where 'kUndefined' is now
  defined for EAxis.

Apr 16, 2002   V.Grichine                geom-csg-V04-00-03
- G4Tubs.cc: restored "vertices" algorithm for CalculateExtent() which
  was temporarly disabled (see reference to tag geom-solids-csg-V03-00-03).
- Updated unit test for G4Tubs, testG4Tubs.cc.

Feb 15, 2002   V.Grichine                geom-csg-V04-00-02
- G4Para.cc: fixed bug in G4Para::Inside() in calculation of xt,
  according to problem report #357.

Jan 31, 2002   V.Grichine                geom-csg-V04-00-01
- G4Sphere.cc: bug fix in Inside() function.
  Fix problem report #216.
- Updated unit test for G4Sphere.

Jan 10, 2002   G.Cosmo                   geom-solids-csg-V04-00-00
- Moved all verbosity mode warnings to G4CSGDEBUG and commented exceptions.
- Activated G4CSGDEBUG mechanism in GNUmakefile.
- G4Sphere.cc: fixed a problem with tolerances in the case of large Radius.
  The case (test18) involves an Rmax = 250 000 000.00 mm
  The ratio                         -9
              tolerance       1.0 10              -17
              ----------- =  ------------ = 0.4 10
                  Rmax                +8
                                2.5 10
  which is smaller than the precision of doubles.
  Solution (for DistanceToOut(), where problem occured):
  use a flexible tolerance, equal to the maximum of (kRadTolerance, 10 * R )
  (J.Apostolakis).
- Upgraded unit tests and fixed warnings on gcc-2.95-2.

Aug 27, 2001   V.Grichine                geom-solids-csg-V03-02-00
- G4Sphere.cc: bug fixed in G4Sphere::SurfaceNormal for the case kNETheta.
  Fixes problem report #290.

May 18, 2001   G.Cosmo                   geom-solids-csg-V03-01-02
- Added G4CSGDEBUG preprocessor flag to discriminate for debug verbosity
  specific to CSG solids. Included in G4Exception of DistanceToOut() for
  "point p is outside" in G4Box, G4Cons, G4Tubs.

Apr 20, 2001   G.Cosmo                   geom-solids-csg-V03-01-01
- Updates for migration to STL vector.
  Modified files: G4Box.cc, G4Cons.cc, G4Para.cc, G4Sphere.cc,
                  G4Torus.cc, G4Trap.cc, G4Trd.cc, G4Tubs.cc.
  Require coworking with the rest of geometry-V03-01-00.

Apr 18,   01   V. Grichine               geom-solids-csg-V03-01-00
- G4Trap.cc:
  o Fixed memory leak in CalculateExtent() for creation of vertices in
    case of finite rotation. (courtesy of D.Williams)
  o Removed useless inclusion of math.h.

Feb 21,   01   V. Grichine               geom-solids-csg-V03-00-03
- G4Tubs.cc:
  o Fixed bug in function Inside(p) in computation of pPhi
    for points at phi = 0 if the (start phi)+(delta phi) is at phi = 0.
  o Temporarly modified CalculateExtent(...), now simply based on
    G4Box::CalculateExtent(...). Updated unit test testG4Tubs.cc.

Feb 01,   01   V. Grichine               geom-solids-csg-V03-00-02
- G4Box: introduced checks against negative (or <2*kCarTolerance) dimensions
  in methods SetXHalfLength(), SetYHalfLength() and SetZHalfLength().

Jan 29,   00   G. Cosmo                  geom-solids-csg-V03-00-01
- G4Box: introduced fixes to algorithm for computation of rotated vertices
  in CalculateExtent() as previously committed in tag geom-solids-csg-V02-00-10.
- G4Torus: extracted logic for G4PolynomialSolver now included in
  global/HEPNumerics. Coworks with tag global-V03-00-02.
- Added dependency to global/HEPNumerics in GNUmakefile.

Jan 18,   00   V. Grichine               geom-solids-csg-V03-00-00
- Fixed condition from (pPhi<0) to (pPhi<-0.5*kAngleTolerance) in
  G4Tubs::Inside(p). Fixes problem report #198.

Dec 07,   00   V. Grichine               geom-solids-csg-V02-00-14
- G4Tubs.cc: corrections in phi-section algorithm of Inside(p).

Dec 01,   00   G. Cosmo                  geom-solids-csg-V02-00-13
- Increased basic number of iterations from 8 to 12 for Newton algorithm
  in G4Torus.cc to assure root retrivial.

Nov 28,   00   V. Grichine               geom-solids-csg-V02-00-12
- Bug fixed in G4Tubs::Inside(p) for analysis of phi positioning when
  on +-fDz surface.

Nov 20,   00   G. Cosmo                  geom-solids-csg-V02-00-11
- 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.
- NB: based on tag geom-solids-csg-V02-00-09.

Nov 16,   00   V. Grichine               geom-solids-csg-V02-00-10
- G4Box.cc: introduced fixes to algorithm for computation of rotated vertices
  in CalculateExtent(). (D.Williams)

Nov 10,   00   G. Cosmo                  geom-solids-csg-V02-00-09
- G4Torus.cc: removed debug print-out which was still included by mistake
  in constructor.

Nov 02,   00   G. Cosmo                  geom-solids-csg-V02-00-08
- QA code revision and cleanup (+fixes from CodeWizard filtering):
  o Removed virtual keyword from GetEntityType() concrete function.
  o General cosmetics.

Oct 31,   00   V. Grichine               geom-solids-csg-V02-00-07
- G4Tubs::DistanceToOut(p,v,...):
  o Initialised sr and sphi to kInfinity and re-introduced additional
    condition on check for Rmin intersection (t2 >= 0).

Oct 26,   00   G. Cosmo                  geom-solids-csg-V02-00-06
- G4Cons::DistanceToOut(p,v): leave out warning if point is outside.

Oct 23,   00   G. Cosmo                  geom-solids-csg-V02-00-05
- G4Tubs::DistanceToOut(p,v,...):
  o Still correction to thickness of conical surfaces. (V.Grichine)
  o Commented-out additional condition on check for Rmin intersection
    (t2 >= 0), recently introduced (roi2).
    Requires further investigation !!
- G4Torus:
  o Introduced more stable numerical method (Newton-based) for computing
    roots of equations in DistanceToIn() and DistanceToOut(). (E.Medernach)

Oct 18,   00   V. Grichine               geom-solids-csg-V02-00-04
- G4Cons.cc, G4Tubs.cc:
  added check against negative distance returned by DistanceToIn/DistanceToOut.
- G4Cons.cc:
  added correction for thickness of conical surfaces, remarkable for big
  opening angles, in DistanceToIn/DistanceToOut functions.

Oct 05,   00   V. Grichine               geom-solids-csg-V02-00-03
- G4Cons.cc:
  o fix in DistanceToIn(p,v): corrected condition on conical surface to
    consider a real projection of the conical surface thickness on XY
    plane (0.5*kCarTolerance*secRMin instead of 0.5*kCarTolerance), when
    dealing with cons with large opening angle.
  o Updated unit test testG4Cons2.cc.

Aug 16,   00   V. Grichine		 geom-solids-csg-V02-00-02
- G4Cons.cc:
  o fix in constructor to check if one of the Rmin is equal to 0,
    if so, it will be set to 1e3*kRadTolerance.
  o Deactivated call to G4Exception in DistanceToOut(p) if p is outside,
    replaced by simple warning.
- G4Tubes.cc, G4Box.cc:
  o Deactivated call to G4Exception in DistanceToOut(p) if p is outside,
    replaced by simple warning.

Aug 08,   00   V. Grichine               geom-solids-csg-V02-00-01
- G4Cons.cc, G4Tubs.cc:
  o fixes to DistanceToOut(p,v,...) to make roots of quadratic equations
    more stable.
  o added check if point is outside in G4Tubes::DistanceToOut(p),
    some code formatting.

Jul 27,   00   V. Grichine               geom-solids-csg-V02-00-00
- G4Cons.cc:
  o added more diagnostics in DistanceToOut(p)
  o cosmetics changes
- Updated unit test for G4Cons.

Jun 22,   00   V. Grichine               geom-solids-csg-V01-01-04
- G4Box.cc:
  o added safety against call from outside in DistanceToOut(p)
  o added more diagnostics before exception in DistanceToOut(p,v,...)
  o cosmetics changes
- G4Torus[.hh.cc]:
  o added new alternative functions SolveBiQuadratic/CubicNew.
  o fix in SolveBiQuadratic() for ambiguous expression in looping index
    detected by Insure++.
- Updated unit tests testG4Torus and testG4Trd.

May 17,   00   V. Grichine               geom-solids-csg-V01-01-03

- G4Tubs.cc:
  o introduced fix in DistanceToOut(p,v,...) in computation of xi, yi for
    (sphi >= -0.5*kCarTolerance). This fixes problem reports #76 and #91.
  o added more diagnostics in case of invalid enum for DistanceToOut.
- Updated unit test for G4Tubs.

May 05,   00   V. Grichine               geom-solids-csg-V01-01-02

- G4Box.cc, G4Trd.cc:
  o modified DistanceToIn(p,v) to return 0 distance in case computed
    value is less than 0.5*kCarTolerance.
  o Cosmetic changes.
- Updated unit tests for G4Box and G4Trd.

Apr 11,   00   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).

Apr 05,   00   G. Cosmo                  geom-solids-csg-V01-01-01
 - G4Tubs.cc: fixed bug in function Inside(p).
              Removed (commented) in the code umproper addition of 2PI
	      to Phi-angle particle (V.Grichine)
 - G4Hype[.hh.cc]: fixed several longstanding issues and bring methods
                   into compliance with specifications  (D.Williams)
 - Moved to "specific" the following classes:
   G4ClippablePolygon, G4EnclosingCylinder, G4Hype, G4PolyPhiFace,
   G4Polycone, G4PolyconeSide, G4Polyhedra, G4PolyhedraSide,
   G4ReduciblePolygon, G4IntersectingCone, G4SolidExtentList,
   G4VCSGface, G4VCSGfaceted.
 - Moved testG4Hype.cc and testG4Polycone.cc from CSG/test to
   specific/test
 - Moved generic tests "SBT" and "Fred" one level up to solids/test.
 - Organised class description comments for the Software Reference Manual
   in all headers.

Mar 23,   00   G. Cosmo                  geom-solids-csg-V01-01-00
 - Tagged.

Mar 22,   00   D. Williams
 - G4PolyhedraSide.cc: fixed bug in G4PolyhedraSide::Normal(...).
   The method Normal(...) (used by G4VCSGfaceted::SurfaceNormal) was not
   filling in the argument bestDistance. This fixes a bug observed in
   G4Polyhedra::SurfaceNormal.

Mar 14,   00   V. Grichine
 - Added diagnostics in G4Cons, G4Sphere and G4Torus in function
   DistanceToOut(p,v,...).

Mar 03,   00   G. Cosmo                   geom-solids-csg-V01-00-05
 - Minor fixes to unit tests to make them up-to-date with recent
   development versions (already included in tag geometry-V01-00-00a).
 - G4PolyconeSide.cc, G4PolyhedraSide.cc: added explicit cast to G4int
   to avoid warnings on Linux.

Jan 19,   00   G. Cosmo			  geom-solids-csg-01-00-04
 - Fixed bug in DistanceToIn(p,v). Modified files: G4Trap.cc and
   testG4Trap.cc. (V.Grichine)
 - Syncronized file versions with HEAD (essentially CVS headers changes).
 - Fixes for missing migration on HEAD related to some files in test/fred
   and test/SBT.
 
Nov 17,   99   J. Apostolakis             geom-solids-csg-01-00-03
 - Tagged

Nov 17,   99   V. Grichine
 - Added initialisation to Eside "side" variable in DistanceToOut(p,v)
   in CSG solids   -->   Problem report from D.C. Williams, BaBar
 - A check in G4Trap Makeplane added.

Nov 10,   99   J. Apostolakis             geom-solids-csg-01-00-02-cand
 - Included  David Williams' modifications to 
   G4IntersectingCone.cc, G4PolyconeSide.cc and G4VCSGfaceted.cc
   and to  test/SBT/SBT.cc  and  test/SBT/polycone.geant4

Nov 10,   99   J. Apostolakis             geom-solids-csg-01-00-01
 - Tagged

May 18,   99   David Williams
 - Replaced 1/DBL_MAX with DBL_MIN (valid correction, seen in tests for STL) 
   in G4PolyPhiFace.cc, G4PolyconeSide.cc and G4PolyhedraSide.cc

Apr 29,   99   David Williams
 - G4Polyhedra and G4Polycone (and G4VCSGfaceted) modified:
         1. Implemented correct copy constructors and assignment operators.
         2. Fix some leaks for tracks that pass exactly through an edge. 
            Some leaks still remain: particularly if a track passes through
	     a corner and between the curved edges of G4Polycone.
         3. G4Polyhedra argument numSide changed to G4int (from G4double)

Apr 13,   99   Vladimir Grichine and Simone Giani
 - Minor consistency fix to 8 basic CSG solids: 
   Tolerance used in calculation of extent but not in one place,
   and not another - this tripped up the client code. 

Feb 16,   99   David Williams
 - Repaired bugs in G4Polycone (G4PolyconeSide.cc) as found in
   test/testG4Polycone and missed in below.
 - Updated definition of DistanceToIn(p) and DistanceToOut(p) to
   return zero when the point p is on the surface of the solid.

Feb 12,   99   David Williams
 - src/G4PolyconeSide.cc updated (revision 1.4) to fix a bug discovered by
   test/testG4Polycone.

Feb   9,  99   David C. Williams      (davidw@scipp.ucsc.edu)
 - I've committed new versions of the CSG Polycone and Polyhedra in the
   geant4 repository, including a new utility class called
   G4ReduciblePolygon. The new versions fix several subtle bugs which my  
   "test3" batch geometry testing code uncovered. In addition, the new class
   G4ReduciblePolygon is used to run strict tests on the validity of input
   parameters.
   To fix a bug in Polyhedra, I had to back out some fancy code that
   allowed it to calculate intersections at a speed that was independent of
   the number of sides. The new version now runs at a speed proportional to
   the number of sides, and is thus much slower for polyhedras with many
   sides. I can fix this, but I thought it would be best to get the bug fixes
   in as soon as possible.

Feb  10,  99   John Apostolakis
 - History file created.
