Re: [Visualpython-users] synchronization of visualization thread

[Bruce S. <ba...@an...>]

I've added this feature request to the "bug" list on sourceforge.net. I too 
have sometimes felt the need of something like this.

Bruce Sherwood

--On Friday, December 15, 2000 4:22 PM +0100 Markus Gritsch 
<gr...@iu...> wrote:

> It would be nice if the visualization thread could be somehow
> synchronized with the thread running the Python script.  The problem
> without synchronization is that the visualization of a scene with much
> animation in it is "distorted", because during a visualization cycle
> some objects have their old position and some others already appear on
> their new location.  For example I have a scene with some springs in
> it, each represented by a helix (curve).  Because the whole spring is
> moveing around quite fast, part of it has the old coordinates and the
> other part already appears at the new calculated ones.
>
> Would it be possible to hav a function similar to visual.rate() which
> suspends the visualization thread and another to reactivate it?  In
> this way it would be possible in the while loop to suspend it, do the
> calculations, activate it and suspend it again before doing the next
> cycle.
>
> while 1:
>     visual.stop() # suspend the visualization thread
>     doMyCalculations()
>     visual.start() # resume the visualization thread
>     visual.rate(30)
>
> Would this be possible with the current VPython design?