Import Geant4 0.0.0 source tree

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+$Id: History,v 2.4 1998/12/04 19:18:08 japost Exp $
+-------------------------------------------------------------------
+
+     =========================================================
+     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 *
+     ----------------------------------------------------------
+
+Dec   4, 1998   J. Apostolakis  transport-00-04-01
+
+  The Velocity Vector for Transport in a magnetic field is now set correctly.
+    --> previously the scalar velocity was automatically promoted to a 3-vector
+
+Nov  25, 1998  J. Apostolakis   
+
+  Added the direction to  LocateGlobalPointAndUpdateTouchable.
+
+Nov  19, 1998   J. Apostolakis  transport-00-03-04
+  Fixes:
+
+  1) The final energy is set equal to the initial energy, because
+     the PropagatorInField does not calculate it correctly yet.  NEEDS Fix
+
+  2) If the requested step size is zero and safety is zero,  the
+     step is now considered geometry limited.  (This can happen
+     if a discrete process tries to take a  step that is very small
+     compared to the mean free path.)  Problem observed by Laszlo in EM tests.
+
+  3) PostStepGetInteractionLength now returns DBL_MAX, not kInfinity.
+
+
+Nov  11, 1998   J. Apostolakis  transport-00-03-03
+
+ Changes to accomodate new interface of Field: 
+         (G4PropagatorInField and G4FieldTrack. )
+
+Oct  30, 1998  J. Apostolakis   transport-00-03-02
+
+   In the case of magnetic field, a flag that determines whether the
+ geometry limited the step was not set.
+
+---------------------------- next two entries recorded Nov 25th : 
+
+Sep  16, 1998  J. Apostolakis   transport-00-03-01
+
+  Checks whether the particle is out of the world volume
+      If so it has exited and must be killed.
+
+
+Aug  28, 1998  J. Apostolakis 
+
+  The PostStepGetPhysicalInteractionLength has fixed (to return kInf)
+  The boolean flags for touchables are now initialised. & Other small fixes ?
+  Test code for non-relocating case added (for debugging).
+
+
+
+==================================================================================
+
+June 08, 1998   J. Apostolakis  (trans-06-04)
+
+   Corrected Safety computation for the case of the field (adding endpoint
+distance instead of curve length.) 
+
+   Added PostStepDoIt method that tries to relocate the particle using
+G4ParticleChangeForTransport
+
+   Transportation is no longer a G4ContinuousProcess. 
+
+
+June 08, 1998   J. Apostolakis  (trans-06-03)
+
+    Modified it to recomputate Safety at the start of a step.  To do this
+it uses the previous step's  calculated safety and endpoint.
+
+
+June 08, 1998   J. Apostolakis  (trans-06-02)
+
+    Modified it to add re-computation of Safety at the endpoint of a step,
+when the safety would become negative.  This is done to allow processes
+to benefit from a realistic (geometrical) value of the safety.  The
+request to do this was from EM physics
+
+
+June 03, 1998   J. Apostolakis  (trans-06-01)
+
+  The safety we is now generalised to mean the limit of assumption of all
+processes. The AlongStepGPIL input value is not the remainder from the
+previous step's geometrical safety.
+
+ So the transportation must recalculate the starting point's safety here.
+As a zeroeth order approximation we set it to zero.
+
+
+April 17, 1998  M. Maire      (recorded by John Apostolakis )
+
+A new process, G4UserSpecialCuts, was added to allow the
+user an alternative method to set some user cuts.
+
+
+April 15, 1998  H. Kurasige   (recorded by John Apostolakis )
+
+The transportation does the absolute minimum required to conform to 
+the new scheme for ParticleChange: G4VParticleChange is used in signature. 
+[ But default G4ParticleChange is still used ]. 
+
+April 14, 1998  John Apostolakis (recorded April 20th).
+History file Created