[plt-scheme] Re: gl-config% - Double buffering

In fact, I succes a little :
I removed (swap-gl-buffers) on (on-paint) and it's seems to work !
(You can try on trying-gl2)

The background is perfect, however the enemy ships are
"flickering" (sorry for this traduction ^^), but i'm still working on
it ;)


On 19 mar, 19:15, Richard Cleis <rcl... at mac.com> wrote:
> It's probably better to choose something simple to do with MrEd,
> first.  In the meantime, you can read about graphical concepts like
> models and views.  Then, you can try OpenGL in Scheme.  Unfortunately
> many OpenGL tutorials use C, which is unnecessarily cumbersome and
> very distracting (that's how I learned some in the last millenia.)
> DrScheme allows experimenting with OpenGL much more interactively.
>
> rac
>
> PLT-Scheme is a much better way to learn
>
> On Mar 19, 2007, at 3:41 AM, tfn... at gmail.com wrote:
>
>
>
> > Ok ! I understand what you both say.
> > Because my project is a game, I was thinking use OpenGL will be a good
> > solution but it's maybe a little too soon for me ^^
>
> > I will try a little more, and if I can't do it, I would make a
> > traditional animated canvas...
>
> > Thanks a lot !
>
> > On 19 mar, 02:05, Matthew Flatt <mfl... at cs.utah.edu> wrote:
> >> At Sat, 17 Mar 2007 12:49:36 -0000, "tfn... at gmail.com" wrote:
>
> >>> With your help and the \PLT-369.8\collects\games\jewel\jewel.scm
> >>> source, i made a new version but this time, the canvas is
> >>> scrambled :
> >>>http://dl.free.fr/p2n3d2La/GLtest.png
>
> >> Your code doesn't use GL for drawing. It draws directly to a MrEd
> >> drawing context, instead. So when you swap the GL buffer in, it just
> >> has garbage, since nothing has been drawn using GL.
>
> >> If you just remove the call `(swap-gl-buffers)', then you'll see your
> >> drawing.
>
> >> For information on double-buffering with MrEd drawing contexts, see
>
> >>  http://list.cs.brown.edu/pipermail/plt-scheme/2007-March/016690.html
>
> >> Matthew
>
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