Re: (X)HTML5 + SMIL?

Awesome, thanks to both of you.  I'm going to try rewriting my mate's
HTML5+JS presentation using Petri's timesheet.js + HTML5, and see how that
goes (may be a few days though, i'm getting geared up for SxSWi).  I'm
particularly interested in seeing how well behaved Timesheets are w/ media
elements.

Do either of you think that there are things that would be nice to have in
HTML5 that would make implementing things like synchronization easier?

-Ted

On Mon, Mar 8, 2010 at 5:41 AM, Petri Vuorimaa <petri.vuorimaa@tkk.fi>wrote:

> David,
>
> Thanks for pointing out also my Timesheets implementation. I haven't been
> working on it for a while. However, if I remember correctly I was able to
> implement all the major features in the SMIL Timesheets document [1]. Even,
> prefetcing and animations work [2]. Implementing the missing features [3]
> shouldn't be a big problem
>
> The layout is taken care by the browser CSS layout engine, which is pretty
> efficient in most modern browsers. The Javascript part is rather simple, and
> thus I didn't find any real performance problems.
>
> I hoping to see some real life use cases. Then, it would be possible to do
> more detailed performance analysis using, e.g., Firebug [4].
>
> Yours,
>
> Petri Vuorimaa
> Aalto University
>
> [1] http://www.w3.org/TR/timesheets/
> [2] http://www.tml.tkk.fi/~pv/timesheets/tests.xhtml
> [3] http://www.tml.tkk.fi/~pv/timesheets/features.xhtml
> [4] http://getfirebug.com/
>
> On 8.3.2010, at 12:06, David Leunen wrote:
>
>
>
>> I'm curious what your experience implementing this in JS has been, whether
>> there are particular performance issues you've encountered, or things that
>> were particularly difficult that you may have had to hack around or
>> anything?
>>
>
>
> I tried to introduce the least hacks possible. Nevertheless, I consider the
> entire script is a hack.
> I haven't stress tested it, so I don't know where are the performance
> bottlenecks. I guess it depends on the JS engines.
> The main difficulty is implementing additivity. The script need a major
> rewrite for that (i.e it doesn't strictly follow the model SMIL defines :
> aka sandwich model).
> Another bug is that animations' starts are not strictly calculated, but
> relies on events. So they may become out of sync, if they are repeated many
> times.
> Apart from that, everything was pretty straightforward, if I remember well.
>
>
> (There's also that timesheet implementation :
> http://www.tml.tkk.fi/~pv/timesheets/ )
>
>
>