Re: Again a canvas question

["Florent. Devin" <Florent Devin lifl fr>]

Lauris Kaplinski a écrit :
> 
> > On Wed, 15 Nov 2000 10:06:30 Nathan Hurst wrote:
> > > On Wed, 15 Nov 2000, Florent. Devin wrote:
> > > > I have to draw 3D figure. For this I use GnomeCanvas.
> > > > I have to do some rotation to show the different facet.
> > > > Is there a way to do a 3D rotation, or have I to do rotation,
> > > > and projection ?
> > >
> > > You would have to do this yourself.  Gnome canvas isn't really the tool
> > > for this - I would suggest you look at OpenGL(Mesa) for this sort of
> > > functionality.
> >
> > Mesa or another OpenGL library will do wonders. There is also a GL drawing
> > area widget for gtk (the package is called gtkglarea) which will help you
> > to access OpenGL within the GTK architecture.
> 
> Yeah. OpenGL does wonders, but if translated to 2D world, it's functionality
> is more comparable to plain X than to those of GnomeCanvas. I.e. you have
> to maintain all graphic state in client-side, and redraw your objects from
> that data.
> 
> If you want to go easy way, you need some scene-graph library. There
> are many free ones to choose: plib, CrystalSpace, OpenInventor...
> If you are adventurous, then I once started Gtk+/C object-based scene
> graph library Floyd (all aforementioned libraries are in C++) - but
> its functionality is very limited at moment.
> 
> Regards,
> Lauris
And where is it accessible ?
-- 
Florent DEVIN, 33 (0)3 20 43 47 30, Fax (33) (0)3 20 43 65 66 (Fax LIFL)
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