source: trunk/ReleaseNotes/Patch4.9.0-1.txt

                 Geant4 9.0 - patch-01 Release Notes
                 -----------------------------------

                                                           28 August 2007

List of fixes included in this public patch since the public release 9.0:

  o Configuration:  (*)
    -------------
    + liblist.c: fixed problem affecting recent CygWin installations on
      Windows in parsing the buffer for the generation of libname.map.
    + binmake.gmk: defined OUT internal variable specifying the proper
      compilation/linking option to Unix or Windows compilers: '-o '
      and '/Fe' respectively. Cleared <TAB> characters where not necessary.
    + SUN-CC.gmk: forced -xO2 as optimisation level.

  o Geometry:
    --------
    + magneticfield:
      o Fix to DistChord() method for Helical Steppers: adopt 'special' case
        also for Ang<2pi not only for Ang<pi; use cos() in place of tan(), to
        improve CPU performance.
      o In G4HelixMixedStepper added possibility to call different steppers
        for small steps and add some statistics how offen different steppers
        are called. Improved AdvanceHelix() to be able to make half step and
        full step in one call.
      o G4RKG3_Stepper: improved internal algorithm to use pre-computed values;
        the stepper now gives comparable CPU performance as ClassicalRK4.
      o Changed FatalException to EventMustBeAborted in AccurateAdvance()
        if proposed integration step is negative.  (*)
    + management:
      o Added dummy constructor and destructor to G4VPVParameterisation.
    + solids/BREPS:
      o Added missing initialisations of kCarTolerance in alternative
        constructors for G4BoundingBox3D, G4Curve, G4CurveRayIntersection,
        G4KnotVector. Addressing problem report #959.
    + solids/CSG:
      o 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.
    + solids/specific:
      o Fixes in G4Polyhedra::GetPointOnSurface():  (*)
        Correctly treat 'totalPhi' instead of 'endPhi' for the case of open
        shapes and 'twopi' for not open shapes.
        Introduced fix for the case when number of sectors (numSide) is equal
        to 1. At the origin of problems observed when checking overlaps for
        polyhedra solids defined as such.
      o Fixed dummy constructors of G4Polycone and G4PolyPhiFace for
        initialisation of 'edges' and 'corners'. Added workaround to
        initialisation of 'corners' vector in G4PolyconeSide class, to allow
        for object persistency with Root-I/O.
      o G4EllipticalCone:
        - DistanceToIn(p): corrected answer for p.z()<-zTopCut and for the
          point p on the surface.
        - DistanceToOut(p,v): now returning positive solution or zero when
          crossing the elliptical surface.
        - Fix in DistanceToOut(p) which was giving always zero.
        - Added some formulas on how to pre-calculate 'SemiAxis' and 'zheight'.

  o Global:
    ------
    + Changed date for patch-01 to release 9.0.

  o Graphics Representations:
    ------------------------
    + Corrected graphical description for G4EllipticalCone in HepPolyhedron
      and G4Polyhedron.
    + G4VGraphicsScene: Added default constructor and virtual destructor.

  o Intercoms:
    ---------
    + G4UIbatch:
      o Bug fixed for the treatment of the last line.
      o Added support for continued line by '\', '_'.
      o String after '#' is treated as comment.
      o White spaces at the head of a line are allowed.
      o Fixed problem on 32bit-Linux.
    + G4UImanager: fixed bug concerning invalid returned object.
    + Introduced "/control/getEnv" and "/control/echo" commands.

  o Electromagnetic Processes:
    -------------------------
    + Polarisation:
      o Removed/renamed obsolete methods and local variables in
        classes G4VPolarizedCrossSection, G4eplusPolarizedAnnihilation,
        and G4PolarizedAnnihilationModel to clear "shadow" warnings on SUN-CC.
    + Standard:
      o G4UniversalFluctuation: added protection such that no sampling of
        fluctuations is done if mean energy loss at the step is below minimal
        excitation energy of the media. The fix is important for cases of
        low-dense gases and very small steps.
    + Utils:
      o G4VEmModel: fixed SelectRandomAtom() method for the selection of
        elements in a compound material.
    + Xrays:
      o G4VXTRenergyLoss: fixed Valgrind run-time errors for wrong memory
        allocation by removing internal initialisation of Sandia table and
        using Sandia table from materials.

  o Hadronic Processes:
    ------------------
    + models/chiral_inv_phase_space:  (*)
      o G4QuasiFreeRatios: fixed DB filling (ID update), responsible for
        excessive growth of memory in long runs. Corrected indexing and
        computation of cos(theta).
    + models/neutron_hp:
      o G4NeutronHPThermalScattering: removed duplicate declaration of
        'dirName', already a class member, to clear compilation warning.
    + models/util:
      o G4KineticTrack: changed local variable names to clear compilation
        warnings on SUN-CC about hiding.
    + stopping:
      o Fixed signature of G4MuMinusCaptureCascade::DoCascade() expecting
        'const' as arguments for A and Z. Resolves linking problems on SUN-CC.

  o Visualization:
    -------------
    + Removed redundant method declarations and minor tidies.

  o Environments:
    ------------
    + Minor bug fixes to G4Py module; updated geometry wrappers and TestEm0
      example.

  o Examples:
    --------
    + advanced/medical_linac:
      o Fixed problem report #880 in DetectorConstruction class.
      o Updated macros; reviewed seed initialisation and modified to use
        default multiple-scattering class instead of MultipleScattering52.
    + advanced/microbeam:
      o Improved dose calculation in the code in order to take into account
        small energy deposits by any particle around the phantom edge voxels,
        by suppressing a selection condition on the PostStep. The total result
        of the dose calculation does not change significantly.
      o Added protection against scattering at large angles in collimators.
      o Suppressed field manager in zones with zero field.
      o Use 'kUndefined' optimization in cell phantom implementation.
      o Changed number of incident alpha particles in microbeam.mac.
    + advanced/underground_physics:
      o Added missing header file G4hIonisation.hh to DMXPhysicsLists
        translation unit.
      o Added G4StepLimiter to physics list as correction of migration
        required since Geant4 release 7.0.
    + extended/electromagnetic/TestEm7:
      o Updated README for physics-list names.
    + extended/electromagnetic/TestEm8:
      o Fixed PAI physics constructors: energy loss processes should be
        active post step.
      o Create VisManager only for interactive session, improved destructor
        of Em8DetectorConstruction class.
    + extended/electromagnetic/TestEm10:
      o Create VisManager only for interactive session, improved destructor
        of Em10DetectorConstruction class.
    + extended/electromagnetic/TestEm13:
    + extended/electromagnetic/TestEm14:
      o SteppingAction : modify logic to take into account low energy packages.
    + extended/medical/fanoCavity:
      o Use 'fUseDistanceToBoundary' in physics-list for 'emOptions'. Cleanup.
    + extended/medical/GammaTherapy:
      o Provide possibility to change cuts between runs.
    + extended/radioactivedecay/exrdm:
      o Removed obsolete hadronic builders and use only QGSP_BIC,
        QGSP_BIC_HP, QGSP_BERT, QGSP_BERT_HP instead.
    + novice/N02:
      o Fixed implementation of ExN02MagneticField class in way field is set.


 (*) Fixes also included in the patched release 8.3.p01.

 ----------------------------------------------------------------------------

                             Technical Notes
                             --------------- 

  o  This patch should be applied on top of release 9.0
  o  Technical notes distributed for release 9.0 are also applicable and
     valid for this patch.

The code and rebuilt binary libraries for release 9.0 are available
through our "Download" Web page:
   http://cern.ch/geant4/support/download.shtml

Please refer to the Geant4 User Documentation:
   http://cern.ch/geant4/support/userdocuments.shtml
for further information about using Geant4.