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Question On explanation of the /vis/scene/add/trajectories command 

Keywords: visualization of trajectories
Forum: Documentation and Examples
Date: 18 Feb, 2005
From: Kazuyoshi Furutaka <Kazuyoshi Furutaka>

Hi all,

In the ExN03EventAction::EndOfEventAction() of the novice example N03,
the author wrote that
  // You can get a default drawing without this code by using, e.g.,
  // /vis/scene/add/trajectories 1000
  // The code here adds sophistication under control of drawFlag.

Indeed, there seems to be no code fragments for visualization of
trajectories in ExN02EventAction::EndOfEventAction()
and we can visualize them using the following commands:
  /tracking/storeTrajectory 1
  /vis/scene/add/trajectories

From the facts above, I thought there's a default functionality
for visualization of trajectories.

On the other hand, in "Additional note 2" of "8.7.6 Visualization
of trajectories" in the "Geant4 User's guide - For Application
Developers -", it is said that
'In order that the command visualization with /run/beamOn works,
the run action and/or event action should be implemented properly.',
which means there's no default.

Which is correct?
Or what are my misunderstandings?

Yours,
Kazuyoshi

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