Gabriele Cosmo
78 lines
2.7 KiB
Plaintext
78 lines
2.7 KiB
Plaintext
26 May 2006
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revised 02 July 2006
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Geant4.8.1 release
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===============================================
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Prerequisites for G4 environment variables.
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==============================================
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This scripts offers the choice of visualization systems;
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one among OGLSX (OpenGL stored mode), or VRML2FILE or Wired3.
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OGLSX is the default viewer and you need no environment variables.
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To use VRML2FILE you have to specify its viewer which is found in your
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search path and the destination directory where *.wrl file is stored.
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If you don't specify the name of the viewer, you can't choose it on the panel.
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For example,
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setenv G4VRMLFILE_VIEWER $HOME/bin/vrmlview
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setenv G4VRMLFILE_DEST_DIR $HOME/tmp/ <= terminate with /
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To use Wired, download it and install under your directory. Java Runtime
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Environment is necessary.
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Then set, for example;
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setenv G4HEPREPFILE_VIEWER $HOME/Wired/bin/wired <= any path you use
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setenv G4HEPREPFILE_DIR $HOME/tmp/
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setenv G4HEPREPFILE_NAME lesson2_00 <= any name you choose.
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setenv G4HEPREPFILE_OVERWRITE 1 <= to reuse the file for "next event"
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G4HEPREPFILE_VIEWER isn't an official Geant4 environment variable but is employed
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here to control the vissssualization viewers.
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The name of the HepRepFile is ${G4HEPREPFILE_NAME}.heprep which will be
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stored in ${G4HEPREPFILE_DIR}.
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ExN03.py script don't use VRML or Wired if their *_VIEWER isn't set.
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But other env variables are also used in the script to look for the
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file and to activate the viewer, you have to set all of the above variables
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in the shell where you activate ExN03.py script.
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NOTICE) VRML viewer blocks the window (modal), so that you have to exit it to
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display another run.
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********* ExN03.py script ***********
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This example id derived from examples/novice/N03.
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You can
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- choose the materials of absorber and gap
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- set the thickness of the absorber and gap
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- set the lateral (in YZ plane) size of the sandwitch cal.
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- choose an incedent particle
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- set its energy
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- set the number of events to run
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- toggle on/off of the electromagnetic processes
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- set cut length
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- set magnetic field
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- typein any Geant4 command (except related with the above functions) and execute it
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How to run it?
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%python ExN03.py
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You can visualize with OpenGL stored mode or VRML or Wired3
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You can choose either of the active viewers by pushing the
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radio buttons.
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=========================
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NOTICE)
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VRML viewer runs in the modal action, and you have to exit it
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to have a new diaplay for the new run, or you want to switch to
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another viewer.
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Wired has the "next"/"previous" event button. So to see the next
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event, first run and then "next" event. Wired doesn't block G4
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and you can have Wired and OGLSX both open.
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ExN03-Wired.py is OBSOLETE. Please use ExN03.py
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