[Sugar-devel] [Physics] New features

[Walter Bender]

So we were using Physics on a really old, slow machine today and it
ran rather slowly. This was a great feature. I would recommend a way
to slow down the clock.

-walter

On Mon, Aug 31, 2009 at 2:10 PM, Gary C Martin<gary at garycmartin.com> wrote:
> Hi Asaf,
>
> On 31 Aug 2009, at 17:24, Asaf Paris Mandoki wrote:
>
>> I'm not sure if you saw my commit with the trace feature so here's a
>> ping.
>
> Thanks for the ping :-) Yes saw your commit, but haven't had time to
> try it hands on yet (trying to put my available time into new Sugar
> toolbar work for 0.86, BTW will need to pick that up for Physics also,
> I hope all that olpcgames/pygame wrapper stuff doesn't bite us too
> hard ;-)
>
> It's likely going to be the end of the week before I can spend much
> time on Physics. We need to carefully think about how to avoid
> complicating the user interface with too many new tools – I can see
> the need for a "World" tab, and "Material" tab, so that we don't
> overload on too many features all at once (i.e a young kid could
> ignore World and Material tabs, and just get on with building things
> as they do now).
>
>> I was also thinking on another new feature. What about joint's
>> displaying the tension they're in by changing their color?
>
> Ooh, yes I like that one, colour would be good, black --> red? Have
> you had a look at the old Bridge Activity? It did this for the "rivet"
> colour.
>
>> We could even break the joints if tension is too high.
>
> We could. But perhaps save this for when we have more material
> controls else where, quick thought is that once we have a "Materials"
> tab, there would be radio buttons for solid links (the default), and
> breakable links... (and could we manage a 3rd elastic/stretchy links
> in the code? That's another nice way to store potential energy in a
> contraption).
>
> Regards,
> --Gary
>
> P.S. I'll likely try and tackle Bills single click bug reports in the
> main git repo before getting to play with new features, but don't let
> that stop you! :-)
>
> P.P.S. Did you like the attempt at illustrating longitudinal wave
> prorogation? It's a but more tricky to set-up than the transverse wave
> example, as you need to get the spacing right to see a nice
> longitudinal wave propagate before the energy is too dissipated.
>
>        http://wiki.sugarlabs.org/go/File:Physics_longitudinal_waves.png
>
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-- 
Walter Bender
Sugar Labs
http://www.sugarlabs.org