Re: [Visualpython-users] Event-driven / callback programming of mouse or keyboard

[Jerzy K. <jer...@un...>]

Bruce Sherwood :
> I too thought of a way to introduce a callback, by using threads (this
> is based on the scheme used in the graphing module, vis/graph.py, to
> enable the feature that dragging the mouse shows crosshairs on a
> graph).
>
> from visual import *
> ...
> while True:
>      rate(100)
>      if run: b.rotate(angle=.01, axis=(0,1,0))
This is nice and may be very useful; in general I think that VP is 
underused in the domain of simulation (+visu+measuring, for pedagogical 
purposes) despite quite a number of applications.

But you might remember our short discussion some months ago. I 
discovered that rate() doesn't work well with threads in general. This 
directive introduces a time-consumming loop. The event processing with 
timers should be low-level (in my understanding of this stuff).

The best.

Jerzy Karczmarczuk