# Category transport History See `CONTRIBUTING.rst` for details of **required** info/format for each entry, which **must** added in reverse chronological order (newest at the top). It must **not** be used as a substitute for writing good git commit messages! ------------------------------------------------------------------------------- ## 2024-10-08 Jonas Hahnfeld (transport-V11-02-00) - Introduce `TRANSPORTATION_WITH_MSC` process sub type ## 2023-01-26 John Apostolakis (transport-V11-01-02) - Added a method to set both warning & important energies in G4TransporationParameters Added method to report lock errors. Improve reporting of inconsistent changes of 'warning' & 'important' energies (not only enforce warning_E < important_E but also warn about violations.) ## 2023-01-25 John Apostolakis (transport-V11-01-01) - Fix unwanted change of default looper parameters. ( Reversed inadvertent creation of G4TransportationParameters in calls to G4Transportation constructor.) ## 2023-01-09 Jonas Hahnfeld (transport-V11-01-00) - Fix compilation warning about unused variable without `G4VERBOSE`. ## 2022-11-25 Gabriele Cosmo (transport-V11-00-10) - Removed debug printouts in G4Transportation. ## 2022-11-23 Gabriele Cosmo (transport-V11-00-09) - Fixed compilation warnings for implicit type conversions on macOS/XCode 14.1. ## 2022-11-10 John Apostolakis (transport-V11-00-08) - New class G4TransporationParameters to hold looper parameters & others. This is a class to be created in master and hold the values of all looper parameters for G4Transportation and derived classes. * G4Transporation's constructor checks for the existence of a default instance. If found, its values will be assigned to the corresponding data members of G4Transporation. This behaviour is inherited by subclasses (using this constructor). * The (default) 'instance' of G4TransportationParameters should be shared by all threads, and used for all particle types. These values could be subsequently changed - e.g. in User Actions. * The G4TransporationParameters object (instance) is current unique. ( Future extensions are envisioned that allow an object of this to be associated with a separate instance of G4Transportation assigned to one or more particle types, e.g. electrons, or muons and positrons. ) ## 2022-10-05 Gabriele Cosmo (transport-V11-00-07) - Fixed compilation warnings on Intel/icx compiler for variables set but not used. ## 2022-05-18 Gabriele Cosmo (transport-V11-00-06) - `G4Transportation`, `G4CoupledTransportation`: fixed misuse of bitwise '|' operator instead of logical. ## 2022-05-11 Jonas Hahnfeld (transport-V11-00-05) - `G4Transportation`: Remove non-working check for any field - Remove `PUBLIC` dependency on `G4magneticfield`, `G4navigation` ## 2022-04-24 Vladimir Ivanchenko (transport-V11-00-04) - moved G4UserSpecialCuts to physics_lists/constructors/limiters - GNUmakefile, source.cmake - removed dependence on electromagnetic/utils ## 2022-04-20 Jonas Hahnfeld (transport-V11-00-03) - `G4CoupledTransportation`: Set flags from `G4Transportation` * Replace `fFirstStepInAnyVolume` with `fFirstStepInVolume` * Replace `fAnyGeometryLimitedStep` with `fGeometryLimitedStep` * Remove wrong check in case of zero steps - `G4Transportation`: * Remove wrong check in case of zero steps * Set step status on volume boundary ## 2022-01-17 Jonas Hahnfeld (transport-V11-00-02) - Remove useless `const_cast` of `G4VSensitiveDetector` ## 2022-01-05 Jonas Hahnfeld (transport-V11-00-01) - `G4CoupledTransportation`: * Use new constant `G4TransportationManager::kMassNavigatorId` * Inherit from `G4Transportation`, remove duplicated variables and methods ## 2021-12-10 Ben Morgan (transport-V11-00-00) - Change to new Markdown History format --- # History entries prior to 11.0 Sep 23rd 2021, Alberto Ribon transport-V10-07-03 ---------------------------- - Added PARALLEL_WORLD_PROCESS to G4TransportationProcessType (to avoid hardwired value "491" in the constructor of class G4ParallelWorldProcess). Apr 16th 2021, Ben Morgan transport-V10-07-02 ------------------------- - Migrate build to modular CMake API Feb 24th 2021, G. Cosmo transport-V10-07-01 ----------------------- - Enable setting of smooth curved trajectories to particle-change in G4CoupledTransportation::AlongStepDoIt(), which was commented out by mistake. Based on discussion in Geant4 Forum thread #4271. Dec 16th 2020, G. Amadio transport-V10-07-00 ------------------------ - Limit reporting of number of calls to G4Transportation::AlongStepDoIt() to when either G4VERBOSE or G4DEBUG_TRANSPORT is defined, which allows to avoid using a thread local variable for a slight performance gain. Oct 26th 2020, G. Amadio & J.Apostolakis transport-V10-06-00 ---------------------------------------- - A substantial reorganisation of G4Transportation::AlongStepGPIL to use values already in cache, reduce the number of branches, and use extra local variables for track properties to avoid indirections. The method is one of the heaviest in many types of simulation workloads. Profiling identified a persistent reduction in misses of instruction-TLB loads after these changes. Nov 1st 2019, J.Apostolakis transport-V10-05-02 ---------------------------- - Optimisation in G4Transportation and G4CoupledTransportation: Avoid calling user field manager's ConfigureForTrack method, except if particle is charged, or forces from magnetic moment or gravity are enabled. * Introduces new common 'flag' in G4(Coupled)Transportation to enable gravity fields. The following static method must be called if the application uses gravity fields: G4Transportation::EnableGravity(G4bool useGravity) - Added flag in G4Transportation/G4CoupledTransportation to silence warning about looping tracks. Aug 15th 2019, D.Sorokin transport-V10-05-01 ------------------------ - Enable relaxing of delta chord condition (to reduce looping particle issue) for tracks below 'important' energy threshold. Aug 15th 2019, J.Apostolakis transport-V10-05-00 ---------------------------- - G4Transportation and G4CoupledTransportation: fix issues related to resetting of looper flag and other state for field propagation. * Replaced check for 'Global' field with check for any field. This is needed to ensure that propagator-in-field state is reset when the setup inludes only local fields. * Ensure that looping flag is reset (false) when a force is not exerted in G4CoupledTransportation::AlongStepGetPhysicalInteractionLength ( Before it was overwritten afterwards. ) Addresses bugzilla Problem report 2144. Thanks to Richard T. Jones (U. Conn) and Laurie Nevay (RHUL) of the GlueX experiment team. Nov 9th 2018, J.Apostolakis transport-V10-04-13 ---------------------------- - G4Transportation and G4CoupledTransportation: Added method SetLowLooperThresholds for low-E applications. Added method ReportLooperThresholds method to print the values. - G4CoupledTransportation: Additional statistics for loopers (to be same as G4Transportation). - G4TransportationLogger: New ReportLooperThresholds() method. Nov 9th 2018, G.Cosmo transport-V10-04-12 ---------------------- - Use G4cout to print statistics from G4[Coupled]Transportation. Nov 8th 2018, J.Apostolakis transport-V10-04-11, 10 ---------------------------- - G4[Coupled]Transportation: Added extra simple statistics, print stats at destruction: * New stats: non-electrons loopers killed (sum E, number, max E & its pdg) * Record statistics for non-electron loopers killed: - total energy - maximum energy and the PDG of the type of that track * Statistics now printed by a new method, and are printed also if verbose = 0 ( was > 0 ) * Description method, to print key parameters (i.e. for loopers) Nov 8th 2018, J.Apostolakis transport-V10-04-09 ---------------------------- - G4Transportation & G4CoupledTransportation: Summary: Restored old default energy thresholds for loopers - but only stable particles killed. Full information: * Added method SetHighLooperThresholds() to restore old default parameters for killing looping particles: - warning energy to 100 MeV ( particles below this killed silently ) - important energy to 250 MeV ( above, tracks are given multiple chances) * Default constructors now use these high values. * Added checks in SetMethods of looper parameters for the presence of Logger to report error if logger is missing. * New auxiliary methods PushThresholdsToLogger(), ReportMissingLogger() Nov 7th 2018, J.Apostolakis transport-V10-04-08, 07 ---------------------------- - G4Transportation & G4CoupledTransportation: * Adjusted killing of looping particles, to apply only to stable particles. * Unstable particles will be propagated indefinitely. * Added Printing the maximum energy and sum of energies of particles 'saved' in G4(Coupled)Transportation destructor. July 9th 2018, G.Cosmo transport-V10-04-06 ----------------------- - Minor code cleanup in G4[Coupled]Transportation classes. Use G4Exception for warnings, instead of streaming to cout/cerr. June 15th 2018, G.Cosmo transport-V10-04-05 ------------------------ - Fixed Coverity warnings... June 15th 2018, G.Cosmo transport-V10-04-04 ------------------------ - Fixed compilation errors on Windows. June 14th 2018, J.Apostolakis transport-V10-04-03 ------------------------------ - New class G4TransportationLogger to consolidate reports from the Transportation processes. First step: it now issues the warning Exception for looping tracks. Added information on material density, step length. - G4Transportation and G4CoupledTransportation: changed default threshold from 0 to 1 keV for warning when abandoning looping tracks. Tracks with less energy do not get reported. Use G4TransportationLogger to report looping tracks. June 8th 2018, J.Apostolakis transport-V10-04-02 ------------------------------ - Fixed and improved reporting of looping tracks. Now issues warning and provides information about position and momentum, in addition to energy and its value at pre-step point. June 8th 2018, G.Cosmo transport-V10-04-01 ------------------------ - Some code cleanup in G4Transportation and G4CoupledTransportation. Removed few global static symbols introduced in previous tag. June 7th 2018, J.Apostolakis transport-V10-04-00 ----------------------------- - G4Transportation & G4CoupledTransportation: changed default values of two thresholds related to the killing of looping particles: 'Important' Energy: particles with MORE energy are killed ONLY after multiple steps (fThresholdTrials) marked as 'looping'. 'Warning' Energy: particles with LESS energy are killed SILENTLY Intermediate value: particles between these energies are killed after one 'looping step' (with warning.) New values: Warning_Energy= 0. Important_Energy= 1.0 * MeV NOTES: 1) This can happen if a track's propagation in field requires a large number of integration steps. ( Default number is 1000, and it is accessed by G4PropagatorInField's Get/Set MaxLoopCount() methods.) 2) Usually the material is vacuum or very low density material. And particles have either low momentum or momentum with a very small component along the direction of the magnetic field (zero or nearly zero). Improved reporting of the issue of dropped particles (above 'warning' threshold'): * Provide the type of particle and the position, in addition to the energy (already). * added recommendations for users if they see the warning. (these are printed only for the first 5 warnings). Addressing problem report #2063. November 22st 2017, V.Ivanchenko transport-V10-03-04 (internal) -------------------------------- - G4NeutronKiller: moved virtual methods from inline to source, do not use generic type, should not affect any result. November 1st 2017, J.Apostolakis transport-V10-03-03 -------------------------------- - Small changes in G4Transportation - early set of 'First' flag. August 28th 2017, G.Cosmo transport-V10-03-02 -------------------------- - Make appropriate setting/use of verbosity from base class G4VProcess, instead of re-defining/using local verbosity flag in G4Transportation and G4CoupledTransportation. Addressing problem report #1999. August 28th 2017, G.Cosmo transport-V10-03-01 -------------------------------- - Fixed use of G4DEBUG_TRANSPORT flag in G4CoupledTransportation. August 25th 2017, J.Apostolakis transport-V10-03-00 -------------------------------- - G4CoupledTransportation & G4Transportation: obtain equation of motion using dedicated method of ProgatorInField. Smaller code, and future proof. February 12th 2015, J.Apostolakis transport-V10-01-03 -------------------------------- - G4CoupledTransportation:: Made SignifyStepInAnyVolume 'flag' static. Stoped using IsLastStepInVolume for step limitation. January 20th 2015, J.Apostolakis transport-V10-01-02 -------------------------------- - G4CoupledTransportation: Added ability to identify first step in a volume in either the mass geometry or in any geometry. Also added flag for last step in a volume in the mass geometry. Extends fix of tag transport-V10-01-00. Since it is not clear whether user wants/needs to identify the first/last in any geometry or just in the mass geometry, allowing this to be a choice: Configurable: whether the flag represents a first/last step in mass geometry or any geometry (currently the default - what was the case for last step before). Also depends in geomnav-V10-01-02 and track-V10-01-00. Addresses Bugzilla issue #1032. January 10th 2014, M.Kelsey transport-V10-01-01 --------------------------- - G4Transportation.cc, G4CoupledTransportation: In AlongStepGetPhysicalInteractionLength(), initialize restMass data member using G4DynamicParticle (as is used in DoIt), not G4ParticleDefinition. Resolves inconsistent kinematics when dynamic mass is measurably different from "PDG" mass. December 17th 2014, J.Apostolakis transport-V10-01-00 --------------------------------- - G4Transportation: Added ability to identify last step in volume for the case of propagation in field. Requires use of tags in navigation (geomnav-V10-01-02) and track (track-V10-01-00) . Addresses Bugzilla issue #1032. November 21st 2014, J.Apostolakis transport-V10-00-06 --------------------------------- (corrected version of transport-V10-00-04) - Added initialization of G4CoupledTransportation data members (fixes Coverity issue 15280) Renamed data member, to make its name canonical. October 15th 2014, M.Asai transport-V10-00-05 ------------------------- - G4CoupledTransportation is reverted to transport-V10-00-03. - G4Transportation and G4CoupledTransportation : made data member fUseMagneticMoment and its set method EnableUseMagneticMoment() static. May 27st 2014, V.Ivanchenko transport-V10-00-03 ------------------------------ - G4UserSpecialCuts - fixed trivial Coverity report May 21st 2014, J.Apostolakis transport-V10-00-02 ------------------------------ - Revised AlongStepDoIt methods of G4Transportation and G4CoupledTransportation: * Adapted to revised signature for G4FieldTrack constructors, which now take PDG spin. * Changed to use different constructor for G4FieldTrack (no Velocity) * Adapted to revised signature of G4ChargeState constructor (PDG spin is now 3rd argument and mandatory. ) NOTE: Requires tag field-V10-00-03 of geometry/magneticfield March 14th 2014, J.Apostolakis transport-V10-00-01 ------------------------------ - Fix time in case of zero step, in G4CoupledTransportation. This caused a 'going back in time' error, when a zero step occurred in particular at the boundary of a parallel world volume when scoring. > Corrects Issue 1017 in the Geant4 Problem reporting System http://bugzilla-geant4.kek.jp/show_bug.cgi?id=1017 NOTE: Requires tag geomnav-V10-00-01 October 18th 2013, J.Apostolakis transport-V09-06-07 -------------------------------- - Initialize missing data members in G4CoupledTransportation constructor Addresses issue identified by Coverity. May 13th, 2013, G.Cosmo transport-V09-06-06 ----------------------- - Removed left-over assert() calls in G4CoupledTransportation. May 9th, 2013, J.Apostolakis transport-V09-06-05 ---------------------------- - Added protection to revised G4CoupledTransportation for case that chord finder (or field manager) is not defined. May 8th, 2013, P.Gumplinger, J.Apostolakis transport-V09-06-04 ------------------------------------------ - Adapted G4Transportation and G4CoupledTransportation to use G4ChargeState for charge/spin/magnetic moment, and to message the equation of motion directly with it. The tag(s) above co-work with and requires the following tags: had-binary-V09-06-05, geomnav-V09-06-06 and field-V09-06-04. Mar. 22nd, 2013, G. Cosmo transport-V09-06-03 ------------------------- - Removed unnecessary static local variables in G4Transportation and G4CoupledTransportation. Mar. 21st, 2013, A. Dotti transport-V09-06-02 ------------------------- - Correcting initialisation of thread-local pointers in G4Transportation and G4CoupledTransportation for MT. Feb. 26th, 2013, G.Cosmo transport-V09-06-01 ------------------------ - Removed unused data members in G4Transportation and G4CoupledTransportation. Some code cleanup. Feb. 6th, 2013, G.Cosmo transport-V09-06-00 ----------------------- - G4Transportation.cc, G4CoupledTransportation.cc: Corrected condition for warning message in AlongStepDoIt(). Code cleanup on MT changes. Jan. 15th, 2013, A.Dotti ------------------------ - Merged changes for multi-threading through automatic process. Modified files: G4Transportation.cc and G4CoupledTransportation.cc. Jul. 12th, 2011, J.Apostolakis transport-V09-05-02 ------------------------------ - G4Transportation.cc: Corrected issues with initialisation of data members reported by Coverity. Renamed data member endpointdistance to fEndPointDistance (to conform). Jul. 5th, 2012 Gabriele Cosmo transport-V09-05-01 ----------------------------- - Explicitly use inclusion of headers for system of units and physical constants, in plan to remove implicit inclusion from globals.hh. Jun. 7th, 2012 Gabriele Cosmo transport-V09-05-00 ----------------------------- - Fixed spurious cases of hidden variable visibility, detected with '-Wshadow' compilation option on gcc compiler. Nov. 4th, 2011, J.Apostolakis transport-V09-04-13 ----------------------------- - Turned off tracking for magnetic moment - by default. It can be enabled in G4Transportation, G4CoupledTransportation by using the new method EnableUseMagneticMoment(). Should ensure particles with a moment are not affected unless user needs this. Nov. 4th, 2011, J.Apostolakis transport-V09-04-12 ----------------------------- * Reduce overhead of the addition of Gravity - G4Transportation: Revised condition for gravity field (version 1). G4CoupledTransportation: Revised the field-detection condition, with improved logic to cope with ConfigureForTrack (for any field) (v2). Deleted dependence on G4UniformGravityField in both. Tag coworks with field-V09-04-05 Nov. 1st, 2011, P.Gumplinger transport-V09-04-11 ----------------------------- - add condition to the condition, gravity != NULL, that the particle's mass is also restMass != 0.0. Modify G4CoupledTransportation.cc according to G4Transportation.cc Oct. 28th, 2011, P.Gumplinger transport-V09-04-10 ----------------------------- - allow for spin tracking of neutral particles with a magn. moment; allow for uniform gravity field tracking of neutral particles; tag coworks with field-V09-04-03. Oct. 28th, 2011, P.Gumplinger transport-V09-04-09 ----------------------------- - remove all special reverence and logic regarding "opticalphoton" from code in G4Transportation.cc and G4CoupledTransportation.cc Aug. 8th, 2011, H.Kurashige transport-V09-04-08 --------------------------- - Modify calculation of deltaTime for optical photon in Transportation (and CoupledTransportation) Use the updated velocity obtained from G4Track::CalculateVelocityForOpticalPhoton instead of the initial velocity of the step. (see problem #1239) [ This is because the velocity at the initial point can refer to a previous volume. If the PreStepPoint was on a surface, we the previous step was in another volume, which shared this PreStepPoint --> and its velocity would be wrong. ] July 6th, 2011, H.Kurashige transport-V09-04-07 --------------------------- - Modify G4Transportation (and CoupledTtansportation) to propose the final local time rather than the global time so that local time can be updated properly. (see problem #1224) [ This adapts to the recent change in Tracking, which made the change of LocalTime trigger the change of Global Time (instead of vice-versa). ] June 10th, 2011, J.Apostolakis transport-V09-04-06 ------------------------------ - Fix for invalid safety passed to SafetyHelper. June 10th, 2011, J.Apostolakis transport-V09-04-05 ------------------------------ - Fix G4Transportation::AlongStepDoIt Use only initial velocity to update time. An estimate of velocity at endpoint is not yet available. (finalVelocity still= initial) ==> It will be updated later in the tracking sequence, when energy loss is applied, and it will be available to Transportation only in the PostStepDoIt() May 26th, 2011, H.Kurashige transport-V09-04-04 --------------------------- - Define ProcessSubType for processes under transportation category - Change process type of G4NeutronBuilder to fGeneral January 26th, 2011, G.Cosmo transport-V09-04-03 --------------------------- - Simplified implementation of G4CoupledTransportation::EndTracking(), to avoid unnecessary static pointer definition. January 21th, 2011, V.Ivanchenko transport-V09-04-02 -------------------------------- - G4UserSpecialCuts - fixed compilation problem January 21th, 2011, V.Ivanchenko transport-V09-04-01 -------------------------------- - G4UserSpecialCuts: fixed bug in energy tracking cut; changed order of checks: 1st energy tracking cut, 2nd track length, 3d time cut, 4th range for charged particles with non-zero mass; removed unnecessary string comparisons. January 4th, 2011, M.Asai transport-V09-04-00 ------------------------- - G4CoupledTransportation: added EndTracking() method to reset the activated navigator list. September 13th, 2010, J.Apostolakis transport-V09-03-01 ----------------------------------- - Improvement to G4Transportation: copy current safety to SafetyHelper each time it is computed (it used to be copied only when it was recalculated at end of step). September 13th, 2010, J.Apostolakis transport-V09-03-00 ---------------------------------- - Retagged - to propose for testing. November 17th, 2009, J.Apostolakis transport-V09-02-00 ---------------------------------- - G4Transportation: o Fix: Update the Step flag which identifies the Last Step in a volume It is now done for the linear steps (no charge or no field) November 26th, 2008, J.Apostolakis transport-V09-01-03 ---------------------------------- - G4CoupledTransportation: o Fix: initialise new data member (in constructor) - found by STT November 21st, 2008, J.Apostolakis transport-V09-01-02 ---------------------------------- - G4Transportation & G4CoupledTransportation: o Performance improvement/correction Avoid to compute safety at end of step for neutral particles November 21st, 2008, J.Apostolakis transport-V09-01-01 ---------------------------------- - G4Transportation & G4CoupledTransportation: o Push value & origin of safety to SafetyHelper only when its value comes from ComputeSafety January 17th, 2008, J.Apostolakis transport-V09-01-00 --------------------------------- - G4Transportation & G4CoupledTransportation: o Clear state of all Chord Finders using G4FieldManagerStore. - Syncronised with files on the HEAD. - Requires co-working tag "field-V09-01-00" (or "field-V09-00-03"). Functionality corresponding to tag "transport-V09-00-52". November 27th, 2007, J.Apostolakis transport-V09-00-08 ---------------------------------- - G4CoupledTransportation o Added updating of particle-looping flag (was commented out.). November 10th, 2007, J.Apostolakis transport-V09-00-07 ---------------------------------- - G4Transportation: o Put back the default for short step optimisation to 'on'. November 9th, 2007, J.Apostolakis transport-V09-00-06 --------------------------------- - G4Transportation: o Update the SafetyHelper using the safety calculated by Navigator. November 27th, 2007, J.Apostolakis transport-V09-00-05a ---------------------------------- - G4CoupledTransportation o Added updating of particle-looping flag (was commented out.) - Also called "transport-V09-00-51" to make it canonical. November 8th, 2007, J.Apostolakis transport-V09-00-05 --------------------------------- - G4Transportation: o Created new method (and class member) for flag on Short StepOptimisation. * When it is true, the optimisation is 'on' steps shorter than the safety will not call G4Navigator - so long as the particle goes straight ie it is not charged or there is no field. * Retained the default value as 'off' - as since changed in transport-V09-00-02 following Alex's suggestion. November 8th, 2007, J.Apostolakis transport-V09-00-04 --------------------------------- - G4Transportation (AlongStepGPIL): o Moved the call to ConfigureForTrack before the check whether fieldMgr has 0 field ptr, in order to enable it to be called even if the field manager points to a zero field. Needed to enable a user to switch a global field on (off was possible), as a track goes between volume (or regions) of a setup. [ Response to request of Atlas/ZM. ] Note: this ordering already existed in G4CoupledTransportation. October 12th, 2007, J.Apostolakis transport-V09-00-03 --------------------------------- - G4CoupledTransportation: o Improves condition for flag that regulates Relocating when only any geometry (including a parallel geometry) limits the step. New PathFinder method required. - Requires and co-works with tag geomnav-V09-00-03 October 4th, 2007, J.Apostolakis transport-V09-00-02 -------------------------------- - G4CoupledTransportation: o First fix for problem in condition for Relocating when only a parallel geometry limited the step. o Change of condition for recalculation safety (from Alex Howard) used, as currently it improves stability. September 25th, 2007, J.Apostolakis transport-V09-00-01 ----------------------------------- - G4Transportation: Modification to disable 'optimisation' in G4Navigator for small linear step (ie when a track does less than the safety). * Relevant only if there is no field, or the particle is neutral * Temporary measure (in current form) to improve comparison old / new Transportation (single/old vs coupled with pathfinder). July 12th, 2007, J.Apostolakis transport-V09-00-00 ------------------------------ - Retagged to enable testing of new developments (which were not included in release 9.0) June 6th, 2007, G.Cosmo transport-V08-03-14 ----------------------- - Includes G4Transportation and G4CoupledTransportation implementations as in tag "transport-V08-03-11": o Corrected bug in ComputeSafety() introduced in "transport-V08-03-10". o Reinitialise SafetyHelper state from G4PathFinder::PrepareNewTrack(). o Should fix the problem seen in test33 and reported by system testing. - All the rest is kept as in tag "transport-V08-03-12". June 1st, 2007, A.Howard transport-V08-03-13 ------------------------ - Renamed classes associated with old biasing scheme with suffix 8: G4ProcessPlacer8, G4VProcessPlacer8, G4VSamplerConfigurator8, G4WeightCutOffProcess8, G4SamplingPostStepAction8, G4VSampler8, G4WeightCutOffConfigurator8 - Includes same G4CoupledTransportation as transport-V08-03-12 ********** transport-V08-03-12 was used for Geant4 9.0 *************** May 31st, 2007, A.Howard transport-V08-03-12 ------------------------ - Archived classes for old biasing scheme, now replaced in module processes/biasing. Removed classes: G4MImportanceConfigurator, G4MScoreConfigurator, G4MScoreProcess, G4MWeightWindowConfigurator, G4MassGCellFinder, G4MassGeometrySampler, G4MassImportanceProcess, G4MassWeightWindowProcess, G4PImportanceConfigurator, G4PScoreConfigurator, G4PScoreProcess, G4PWeightWindowConfigurator, G4ParallelGCellFinder, G4ParallelGeometrySampler, G4ParallelImportanceProcess, G4ParallelTransport, G4ParallelTransportConfigurator, G4ParallelWWnTransportProcess, G4ParallelWeightWindowProcess, G4PlaceOfAction, G4ProcessPlacer, G4SamplingPostStepAction, G4VProcessPlacer, G4VSampler, G4VSamplerConfigurator, G4WeightCutOffConfigurator. - Classes are kept on the HEAD for testing purposes. - Tag does NOT include changes from tags "transport-V08-03-00" to "transport-V08-03-11" inclusive. May 29th, 2007, A.Howard/J.Apostolakis transport-V08-03-11 -------------------------------------- - G4CoupledTransportation: o Corrected treatment of time integration (made flags do as in original Transport). o Again use momentum change flag in particle-change (optimisation). o Also reset looping counter when no field or charge is present. - Corrected names in Transport, Coupled Transport. (J.Apostolakis) May 29th, 2007, J.Apostolakis transport-V08-03-10 ----------------------------- - Gone back to G4CoupledTransportation. o G4Transportation is now the original (what was called G4Transportation8 since "transport-V08-03-03"). o G4Transportation8 still exists, to enable code that utilises it to compile (transitional). Expect that G4Transportation8 will be taken away asap. May 29th, 2007, J.Apostolakis transport-V08-03-04 ----------------------------- - G4Transportation. Refined relocation: o Full (re)location only if any geometry limited the step. o Fast relocation otherwise. - Renamed & new data members: f(Mass,Any)GeometryLimitedStep. May 25th, 2007, J.Apostolakis transport-V08-03-03 ----------------------------- - G4Transportation o Fix for case of zero proposed step: missed to set end position. (A.Howard) - G4Transportation8 o Fixed StartTracking() to reset number of looping steps and to clear propagator state (safety issue in case of overlaps). May 18th, 2007, J.Apostolakis transport-V08-03-02 ----------------------------- - G4Transportation: o Corrected full safety at step start, to protect against negative value. o Obtain the endMassSafety from new saved value in G4PathFinder. - G4Transportation8: o Small cleanup, and hints for saving Safety to helper. May 13th, 2007, A.Howard transport-V08-03-01 ------------------------ - G4VTrackTerminator: o Use call to G4GeometryTolerance instead of kCarTolerance. o Requires tag "global-V08-03-00" and related tag set. May 9th, 2007, J.Apostolakis transport-V08-03-00 ---------------------------- - G4Transportation (hh,icc,cc) o Renamed G4CoupledTransportation to G4Transportation o Merged changes on branch used to bring in CoupledTransportation, porting changes in G4Transportation since the creation of CoupledTransportation. o Also merged branch used for fixes in G4Transportation.cc (1.60.2, 1.60.4) for convergence to Release 9.0. - Renamed G4Transportation to G4Transportation8 - G4ProcessPlader changed to reflect these revisions. (A.Howard) May 8th, 2007, G.Cosmo transport-V08-02-03 ---------------------- - Use call to G4GeometryTolerance instead of kCarTolerance in G4VTrackTerminator. - Requires tag "global-V08-03-00" and related tag set. May 2nd, 2007, J.Apostolakis transport-V08-02-02 ---------------------------- - G4CoupledTransportation: o Make treatment of mass and full safety coherent (to-dos remain in G4PathFinder). o Added storing of full safety in state; retrieve it after compute step from PathFinder; calculate them same way at start of step. o Put back in the code for treating looping particles. February 15th, 2007, J.Apostolakis transport-V08-02-01 ---------------------------------- - G4Transportation: protection against velocity=0 in AlongStep (invalid). February 15th, 2007, J.Apostolakis transport-V08-02-00 ---------------------------------- - G4Transportation: call PropagatorInField to clear state for new track --> addresses reliabilitiy problem seen by Atlas. This fix is related to overlaps, clearing the safety value (which is multivalued due to the overlaps, and thus can become invalid for a new track in an overlap region.) November 22nd, 2006, J.Apostolakis transport-V08-01-04 --------------------------------- - Add new classes G4NeutronKiller and G4NeutronKillerMessenger (created by V. Ivantchenko) November 22nd, 2006, J.Apostolakis transport-V08-01-03 --------------------------------- - G4CoupledTransportation: o AlongStepGPIL() now returns an estimate for the safety for all geometries to make up for the fact that some other processes only have PostStep GPILs which cannot currently influence safety. - NOTE: Fix / Workaround for deficiency of others. November 13th, 2006, J.Apostolakis transport-V08-01-01 --------------------------------- - Updated G4CoupledTransportation to use new signature of G4PathFinder::ComputeStep that added new argument at the end: currentVolume. June 2nd, 2006, J.Apostolakis transport-V08-00-02 ----------------------------- - Added new class G4CoupledTransportation, a revised version of Transportation, for use in 'coupled' parallel navigation in different geometries. - Includes non-revisions for migration to sstream (Nov 2005). Feb. 6th, 2006, J.Apostolakis/P.MoraDeFreitas transport-V08-00-01 ---------------------------------------------- - Corrected problem with suspended tracks - PR# 802. - Added StartTracking() method which takes over responsibility to clear the state for a new track, and to message other relevant component to clear their state (problem report and proposed revision by P.MoraDeFreitas). Jan. 16th, 2006, J.Apostolakis transport-V08-00-00 ------------------------------ - G4Transportation: o The particle's charge is now taken from the dynamic particle, so that it can take into account changes from the interaction of an ion with matter (eg stripping e-). (V.Ivantchenko) Nov. 21st, 2005, M.Asai transport-V07-01-00 ----------------------- - Migration to . - Fix a warning message in G4ParallelTransport. May 10th, 2005, J.Apostolakis transport-V07-00-01 ----------------------------- - Added process type to G4Transportation Mar. 7th, 2005, M.Asai transport-V07-00-00 ---------------------- - Added virtual to destructors of G4StepLimiter and G4UserSpecialCuts. Dec. 7th, 2004, G.Cosmo transport-V06-02-05 ----------------------- - Implemented migration to . Nov. 23th, 2004, J.Apostolakis transport-V06-02-04 ------------------------------ - Added Threshold energy for not abandoning stuck particles quickly. Oct. 19th, H.Kurashige transport-V06-02-03 ---------------------- - Migrated processes to new G4VParticleChange interface. Sep. 9th, M.Maire ----------------- - Apply tracking cut only if Rmin or Emin > DBL_MIN in G4UserSpecialCuts. Oct. 8th, M.Asai transport-V06-02-02 ---------------- - A protection is added in G4Transportation.cc for an application with parameterized volume but without any EM process. Aug. 27th, M.Asai transport-V06-02-01 ----------------- - A pointer to sensitive detector is added in G4ParticleChangeForTransport. - G4Transportation takes care of this pointer. Jul. 26th, M.Asai transport-V06-02-00 ----------------- - Introduce G4UserStepLimit to handle MaxAllowedStep in G4UserLimits. Feb. 5th, M.Asai transport-V06-00-00 ---------------- - Fixed a bug in G4UserSpecialCuts related to charged geantino Nov. 26th, G.Cosmo transport-V05-02-07 ------------------ - Replaced mis-typed class name G4SplittingAndRussianRouletePostStepDoIt with G4SamplingPostStepAction and updated classes accordingly. - Adopt new G4Exception scheme. - Header inclusions and code cleanup. Nov. 14th, G.Cosmo transport-V05-02-06 ------------------ - G4Transportation.cc: o Added inclusion of G4ChordFinder.hh, after latest changes to field. Oct. 4th, G.Cosmo transport-V05-02-05 ----------------- - Modified GNUmakefile: o added dependency to new module "geometry/navigation". - Coworks with "geometry-V05-02-00" and "digits_hits-V05-02-00". Sep. 25th, H.Kurashige transport-V05-02-04 ---------------------- - modify GNUmakefile to use processes/cuts category - migrate to model variant of EM physics in G4UserSpecialCuts (V.Ivantchenko) Aug. 27th, M.Dressel transport-V05-02-03 -------------------- - cleanup of header file inclusions Aug. 19th, M.Dressel transport-V05-02-02 -------------------- - rename G4ImportancePostStepDoIt to G4SplittingAndRussianRouletePostStepDoIt since it is also used in weight window biasing Aug. 19th, M.Dressel transport-V05-02-01 -------------------- - first implementation of weight window technique Jul, 31st, P.Gumplinger transport-V05-02-00 ----------------------- - G4Transportation.cc: o Use the finalVelocity to update TofF for optical photons. Jul, 17th, J.Apostolakis ------------------------ - G4Transportation.cc: o Attempt to correct photon problem - by using the velocity from current medium for massless particles. Jun, 25th, J.Apostolakis ------------------------ - G4Transportation[.hh.icc]: o Added verbosity level to control the printing of warnings (see below). Jun, 21st, J.Apostolakis transport-V05-01-06 ------------------------ G4Transportation: - Added warning when energy changes from propagation in magnetic field (or other field that conserves energy) due to the inaccuracy of numerical integration of the equations of motion. Jun, 21st, J.Apostolakis transport-V05-01-05 ------------------------ - G4Transportation: o Use new method of PropagatorInField to simplify choice of global/local field. o Activated the new capability of a (user derived) field manager to configure itself with different accuracy parameters depending on track's energy, particle identity, or other property. - Notes: o Requires tags "field-V05-01-04" and "geomvol-V05-01-03" o Includes updates of files to use in place of "g4std", as made at the CVS HEAD. Jun, 13th, M.Dressel transport-V05-01-04 -------------------- - Added to put the delete fImportancePostStepDoIt in G4MassImportanceProcess and G4ParallelImportanceProcess. Jun, 13th, M.Dressel transport-V05-01-03 -------------------- - Fixed bug created by last bug fix in G4MassImportanceProcess and G4ParallelImportanceProcess. Jun, 12th, M.Dressel transport-V05-01-02 -------------------- - Fixed "'this' : used in base member initializer list" in src\G4MassImportanceProcess.cc, src\G4ParallelImportanceProcess.cc Jun, 4th, G.Cosmo transport-V05-01-01 ----------------- - Fixes for inclusion of in G4ParallelImportanceProcess.cc and G4ParallelTransport.cc in view of the g4std wrappers migration. May, 13th, J.Apostolakis transport-V05-01-00 ------------------------ - Fixes to G4Transportation.cc to accomodate incorrect and missing functionality for two use cases: o a local field when no global field exists (it was not seen) o overriding an existing global field by a 'zero' field by creating a local field manager that has a null G4Field pointer (a use case which did not exist.) Further work to verify these use cases work is required. Apr, 7th, V.Ivanchenko transport-V05-00-04 ----------------- - Migration to "cuts by region" for G4UserSpecialCuts. Apr, 3rd, G.Cosmo transport-V05-00-03 ----------------- - Cleared pedantic warnings and some cosmetic cleanups... Jan, 14th, M.Asai transport-V05-00-02 ----------------- - Consolidated transport-V05-00-01 tag for G4Transportation.cc Jan, 7th, M.Asai transport-V05-00-01 ---------------- - Fix in G4Transportation.cc for updating material-cut-couple. Dec, 16th, G. Cosmo transport-V05-00-00 ------------------- - Merged branch "geant4-04-01-ref-02-cuts-branch" to HEAD. Included development for 'cuts-by-region' in G4Transportation.cc. Nov, 20th, J. Apostolakis transport-V04-01-05 ------------------------- - Tagged. Tag requires: geomvol-V04-01-06 and tracking-V04-01-10 and is dependent also on greps-V04-01-01 and track-V04-01-01. Nov, 8th, J.Generowicz - Copy auxiliary smooth trajectory point from PIF to ParticleChange Nov, 4th 2002 M.Dressel transport-V04-01-04 ----------------------------------------------------- - remove G4std:: where it does not belong to - replace str() functions Oct 31st, 2002 M.Dressel transport-V04-01-03 ----------------------------------------------------- - bug fix in G4MassGeometrySampler and G4ParallelGeometrySampler Oct 28th, 2002 M.Dressel transport-V04-01-02 ----------------------------------------------------- - bug fix in G4MassGeometry Oct 22th, 2002 M.Dressel internal_7_transport-V04-01-01 -------------------------------------------------------- - moving G4CellStoreScorer, G4TrackLogger to digits+hits/detector - resolving G4SLRawValues Oct 16th, 2002 M.Dressel internal_6_transport-V04-01-01 -------------------------------------------------------- - changes recomanded by codewizrd - added GCellFinder concept Oct 10th, 2002 M.Dressel transport-V04-01-01-internal-5 -------------------------------------------------------- - changing sampler concept: instead of separat samplers for all combinations of importance sampling, scoring, wieght roulette for parallel and mass geometry there are two Samplers now for the mass and parallel geometry: G4MassGeometrySampler and G4ParallelGeometrySampler. - Introduction of Configurators to setup the processes. Sep 18th, 2002 M.Dressel transport-V04-01-01-internal-4 -------------------------------------------------------- - tagging a version before reducing the number of Samplers Sep 2th, 2002 M.dressel transport-V04-01-01-internal-3 ----------------------------------------- code cleanup for code-wizard Aug 29th, 2002 M.Dressel int-1-V04-01-01 ----------------------------------------- - adopted to changes in int-2-geombias-V04-01-01: renaming of G4PTouchableKey to G4GeometryCell changing G4VIStore and G4IStore and dependants Aug 13th, 2002 M.Dressel transport-V04-01-01 ---------------------------------------------- - added G4CellStoreScorer, G4VTrackTerminator and changed the sampler classes in order to use the G4VTrackTerminator (if necessary) to kill a track. - coworks with geombias-V04-01-01 July 18th, 2002 M.Dressel ------------------------- - bug fix in G4TrackLogger July 11th, 2002 M.Dressel internal-2-transport-V04-01-01 -------------------------------------------------------- - moved the standard scoring classes to run because they need G4EventManager. July 10th, 2002 M.Dressel internal-1-transport-V04-01-01 -------------------------------------------------------- - add classes for standard scoreing. Remove G4ScorePrinter and G4Scorer. G4StandardScorer and G4StandardScoreTable may be used as replacement. The source file G4StandardScorer.cc may be found in extended/examples/B09/src because it needs to acces the G4EventManager. Jun 13, 2002 M.Dressel transport-V04-00-09 --------------------------------------------- - add classes for creating and printing tallies. May 31, 2002 M.Dressel transport-V04-00-08 -------------------------------------------------------- - made weight window sampling to apply only at inital track step 1. May 31, 2002 M.Dressel transport-V04-00-07 -------------------------------------------------------- - bug fix in G4PArallelScoreSampler.cc and remove Warning from ParallelTransport. May 31, 2002 M.Dressel transport-V04-00-06 -------------------------------------------------------- - renaming of the Manager classes to Sampler classes - substitution of G4ParallelManager inside the Sampler classes May 30, 2002 M.Dressel -------------------------------------------------------- - chamged G4VImportanceScoreConstructor to G4VSampler May 30, 2002 M.Dressel -------------------------------------------------------- - all the ImportanceScoreManagers derive form G4VImportanceScoreConstructor May 30, 2002 M.Dressel internal-3-transport-V04-00-05 -------------------------------------------------------- - changes in Importance Manager constructors, G4ImportanceAlgorithm as pointer May 29, 2002 M.Dressel internal-2-transport-V04-00-05 -------------------------------------------------------- - bug fix in G4PImportanceWWindowScoreManager.cc and G4ParallelImportanceManager.hh. May 24, 2002 M.Dressel internal-1-transport-V04-00-05 ------------------------- - Change in G4VProcessPlacer and G4ProcessPlacer: add member function RemoveProcess to properly remove a process. - Add classes for wieght window biasing. May 02, 2002 M.Dressel ------------------------- - Change in G4ProcessPlacer: set process vector via process manager not directly. - Change in G4ParallelTranport: use StartTracking to signal inital step. This should help to locate "suspended" tracks. April 24, 2002 G.Cosmo - transport-V04-00-05 ----------------------- - Added G4DEBUG_TRANSPORT flag in GNUmakefile and (on suggestionh of J.Apostolakis) replaced to G4VERBOSE in G4Transportation::PostStepDoIt() for extra-check on volume boundary. Issues addressed by problem report #130 should now be resolved. April 10, 2002 M.Dressel - transport-V04-00-04 ------------------------- - Added comments to headers of transportation classes and managers for importance biasing, to fullfill Software Reference Manual. Apr 9, 2002 G.Cosmo ------------------- - Added liability disclaimer to scorer classes and minor cosmetics. Apr 8, 2002 M.Dressel - transport-V04-00-03 --------------------- - Resolved compilation problems on HP-aCC. Apr 4, 2002 M.Dressel - transport-V04-00-02 --------------------- - Cleaned compilation problems for G4std/std. Apr 4, 2002 M.Dressel - transport-V04-00-01 --------------------- - Resolved compilation problems on SUN-CC and Linux-egcs. Mar 28, 2002 M.Dressel - transport-V04-00-00 ----------------------- - First implementation of transportation classes and managers for importance biasing and scoring. Co-works with "geometry-V04-00-01". Mar 25, 2002 G.Cosmo --------------------- - Added dependency to new module geometry/biasing in GNUmakefile. Dec 8, 2001 J.Apostolakis - transport-V03-02-07 --------------------------- - Activated the killing of 'looping' particles -- to be used also to abandon (kill) particles that are stuck (eg at boundaries). [ Fix for problems of stuck particles reported by CMS (P.Arce), and Atlas (A.Del'Acqua, A.Rimoldi) ] Nov 28, 2001 J.Apostolakis - transport-V03-02-06 --------------------------- - Fix for the new updating of the time for fields -- correcting previous tag. By keeping account whether the field changes the energy (and therefore the velocity) in the field manager. Requires and co-works with - "field-V03-02-07" - "geomvol-V03-02-02" in order to compile (let alone have any effect.) Nov 10, 2001 J.Apostolakis - transport-V03-02-05 --------------------------- - Motivated by the use case of an Electric Field, * in order to achieve reasonable accuracy in time integration, * and to enable fields that vary with the global time changed Transportation to try to obtain the delta_time from FieldTrack. Co-works with and requires "field-V03-02-03" to have any effect. Nov 9, 2001 G. Cosmo - transport-V03-02-04 ------------------------ - Fix in G4Transportation.cc for initialisation of touchable handle. Nov 8, 2001 G. Cosmo - transport-V03-02-03 ------------------------ - Introduced changes to G4Transportation for reference-counted touchables (R.Chytracek). Added methods GetFreeTouchable() and SetTheOtherTouchableFree(G4VTouchable*). Nov 6, 2001 J. Apostolakis - transport-V03-02-02 ------------------------------ - Added protection in G4Transportation::AlongStepGPIL for messaging "ResestStepEstimate" of ChordFinder for the case there is no global field. ** NOTE this is not a perfect resolution (see NOTE in log file). ** --> Thanks to Radovan Chytracek for reporting this problem (move to file log) Aug 16, 2001 J. Apostolakis - transport-V03-02-01 ------------------------------ - Tagged. (This tag requires field-V03-02-00) Aug 16, 2001 J. Apostolakis ------------------------------ - Erasing state information from previous track at the first step of each track. (-> this is required to ensure repeatability) This should eliminate any non-repeatability due to the propagation in field. ( Requires updated version of G4ChordFinder ) Jul 19, 2001 G. Cosmo transport-V03-02-00 ------------------------ - Synchronised with CVS HEAD after introduction of warrenty disclaimer. - Modified author list in G4Transportation (P.Gumplinger). Apr 11, 2001 J. Apostolakis transport-V03-01-02 ------------------------------ - Corrected the last update of G4Transportation.cc, which overwrote the value of the spin in the cases where a particle was not charged (eg photon) or a charged particle was not in a field. Apr 11, 2001 P. Gumplinger transport-V03-01-01 ----------------------------- - Updated G4Transportation.cc to make spin tracking work correctly: o Replaced the line originally commented out: // fTransportEndPolarization= aFieldTrack.GetSpin() ; // Not yet possible with: fTransportEndSpin = aFieldTrack.GetSpin(); o Added to the AlongStepDoIt() the following call: fParticleChange.SetPolarizationChange(fTransportEndSpin); Mar 19, 2001 J. Apostolakis transport-V03-00-01 ------------------------------ - G4Transportation modified to use new FieldTrack, and get Kinetic Energy from it. This new FieldTrack together with changes in associated Equation of Motion classes implement the momentum vector as independent variable in place of the velocity. So this tag requires - new geometry/magneticfield tag "field-V03-00-01", and - new geometry/volumes tag "geomvol-V03-00-03" for new G4PropagatorInField (). Feb 27, 2001 J. Apostolakis (transport-V03-00-00) ------------------------------ - G4Transportation.cc: * Modified calculation of energy at the end of field step to make it more accurate at low velocities, (while remaining correct at high gammas). This improves the energy determination. Together with electromagnetic/standard tag "stand-V03-00-03" this addresses the main problem in propagating in an electric field (Problem report # 108 ) Sep 22, 2000 V. Grichine (transport-V02-00-00) [recorded by G.Cosmo] --------------------------- - G4Transportation.cc: o added formula for Tkin corresponding directly to relativistic definition of Tkin = Etot - mc^2 = mc^2(gamma -1), where gamma is a particle Lorentz factor. o general cosmetics. Jun 19, 2000 J. Apostolakis (transport-V01-01-02) ------------------------------ - G4Transportation.cc: Set the True Step Length in G4Transportation.cc - Cosmetic: updated other files to the head, as there were no differences from it (CVS headers). May 15, 2000 J. Apostolakis (transport-V01-01-01) ------------------------------ - G4Transportation.cc: Set the material in materialChange, in order to get correct behaviour for volumes that parameterise the material. (Fix is dependant on changes to particleChangeForTransport and StepPoint) - Modified setting of touchable change, in order to preserve const-ness where it exists. Nov 25, 1999 J. Apostolakis (transport-V00-01-01) ------------------------------ - G4Transportation.cc: Added protection for the case of a zero step (when there is a field) - G4UserSpecialCuts: protection to use min range and min kinE only for charged particles. June 9, 1999 J. Apostolakis (transport-01-00-02) ------------------------------ - Added a protection so that full relocation is not used for very small moves. 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. 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 -------------------------------- - History file Created