Problem 254 - very small steps in replicated Tubs
Summary: very small steps in replicated Tubs
Status: RESOLVED FIXED
Alias: None
Product: Geant4
Classification: Unclassified
Component: geometry/volumes (show other problems)
Version: 3.1
Hardware: PC Linux
: P2 critical
Assignee: Gabriele Cosmo
URL:
Depends on:
Blocks:
 
Reported: 2001-05-02 09:26 CEST by martin.liendl
Modified: 2001-05-30 02:16 CEST (History)
0 users

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Description martin.liendl 2001-05-02 09:26:18 CEST 
Tube-sections are replicated in phi. When trying to track geantinos through
them, very small steps (stepsize = boundary limit = 1e-9mm) are produced.
This could be seen in Geant4.3.1 and Geant4.3.1.ref01 but not in Geant4.3.0.
(Linux, redhat 6.1, gcc-2.91.x or gcc-2.95.x).
To see this, the detector description of exampleN01 was modified
to produce a simple replicated Tub structure. Code is attached.
Apply following commands to get the small steps:
/gun/position 5000 0 5000 mm
/gun/direction 0.695913 6.08386e-08 -0.718126
/gun/particle geantino
/tracking/verbose 1
/run/beamOn

Thanks!
Comment 1 Gabriele Cosmo 2001-05-02 12:29:59 CEST 
Under investigation. Thanks for the report.
Comment 2 Gabriele Cosmo 2001-05-30 02:16:59 CEST 
Fix introduced in tag "geomvol-V03-01-04".
It will be included in next public release.