|Message: Re: ogl refresh from threads||Not Logged In (login)|
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I've not seen that message before. It is true that in multithreading mode event drawing is done on a sub-thread. For OpenGL over X11 and Qt, the GL context is switched to the sub-thread at beginning of run and switched back again at the end.
Where does that message come from? What UI are you using?
You seem to think it is correlated with an "automatic screen refresh". That would only be done if
which is the default but it can be changed with
> In other words, would it be possible to re-draw the screen only form the > main thread, after all workers are done with their events?
Curiously, that's what we did in version 10.0 as a stop-gap solution when multithreading was first introduced. (You can't have all subthreads drawing at the same time.) From 10.1 - or was it 10.2 - we queue events and have them drawn from a special visualisation sub-thread. I don't see an easy way to mimic the old behaviour. You could, of course, use sequential mode for visualisation. I think you can do that just by instantiating the G4RunManager in your main program instead of G4MTRunManager.
In multithreading mode you can "/vis/disable". If in your end of event action
the events will be kept and you can view them one by on with
Maybe we could add an option to draw all kept events, but that's not available at present.
Hope that helps.
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