Re: The best/standard way to use opengl in gtk
- From: Emmanuele Bassi <ebassi gmail com>
- To: gtk-list gnome org
- Subject: Re: The best/standard way to use opengl in gtk
- Date: Fri, 01 Oct 2010 01:28:51 +0100
On Thu, 2010-09-30 at 23:34 +0100, Jeremy Henty wrote:
> On Thu, Sep 30, 2010 at 06:03:03PM +0100, Emmanuele Bassi wrote:
> > On Thu, 2010-09-30 at 16:08 +0100, Jeremy Henty wrote:
> > > We gave up on clutter because of its performance. Not only did it
> > > render slowly but creating a new clutter item was O(number of
> > > already existing items).
> > it's a scene graph: what did you expect? :-p
> Hey, if I had known what to expect I wouldn't have been profiling
> things! :-p ;-) But seriously, I was surprised to see O(n) insert
> performance. Are scene graphs so new/esoteric that no-one has done
the O(n) insertion is purely an internal detail of ClutterGroup: we kind
of guarantee that the order of insertion maps the order of allocation
and paint for that particular container implementation. nothing prevents
you from implementing your own Container that has O(1) insertion, or O(n
log n), or whatever kind of insertion you need.
but, again: if you're just displaying models then a full scene graph,
with per-node event handling and animation, it's not what you want.
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