Geant4 Cross Reference

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Geant4/examples/extended/visualization/userVisAction/README

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  1      =========================================================
  2      Geant4 - an Object-Oriented Toolkit for Simulation in HEP
  3      =========================================================
  4 
  5                examples/extended/visualization/userVisAction
  6                ---------------------------------------------
  7 
  8 This example illustrates how to create a "vis action".
  9 
 10 The idea is that you register a vis action with the vis manager and
 11 activate it by a command /vis/scene/add/userAction.  In this case, it
 12 draws a simple logo.
 13 
 14 1) UVA_VisAction.cc defines a G4VUserVisAction and implements a Draw
 15    method.
 16       
 17 2) In the main program, UVA_VisAction is instantiated and
 18    its pointer registerd with the visualization manager. You may
 19    optionally specify an extent at this point to assist the viewers to
 20    locate the objects.
 21 
 22 3) To visualise, use the usual Geant4 vis commands to create a view
 23    and scene, then add the vis action to the scene with
 24    /vis/scene/add/userAction - see vis.mac.
 25 
 26 Note: The system needs an "extent" in order to point the virtual
 27 camera and adjust its field of view, etc.  This defines the "standard
 28 view".  You may zoom, etc., from this standard view.  The extent may
 29 be specified as suggested above or by using /vis/scene/add/extent.
 30 
 31 
 32 John Allison
 33 27th November 2014