On Wed, Mar 5, 2008 at 9:29 AM, Serg Kovrov <[EMAIL PROTECTED]> wrote:
>
> I am very much for the new (1.1) style of main loop. Actually I do a
> hybrid way - 'schedule' update routine when there is something to
> update, and 'unschedule' when no tasks left to update.
>
> The only problem is, for complex objects like particle systems,
> separation of 'update' and 'draw' routines is hurting performance. In
> case of particle it would be better to update each particle state and
> draw it in place. I can't do it in 'on draw' handler, because I need
> to know the time delta.
Are on_update and on_draw functions or rather methods on a class? Can
you not store the time delta as a property on the class?
> I guess I can workaround it by storing time delta globally on update
> to use it in draw routines, but this does not feels natural.
>
Do what works first and then make it feel natural later ... ;)
Regarding the performance issues, my first guess is that you have
update and draw function per particle in the system - because the
addition of 1 function call cannot hurt performance but N/2 vs. N
functional calls is a significant optimization. If my wild guess is
true, then consider putting all your particles in one class
(ParticleSystem) so you have at most 2 function calls per particle
system (unless you make calls to change their positions - I hope not).
I have more guesses ... but that would lead us to a game of charades.
Anyhow, please post some code, so someone can perhaps point out where
the bottleneck is.
Cheers,
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d.p.s
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