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

If you are just writing a 2d game and want something better than mred 
but easier than opengl you can try my Allegro package in planet. It 
works pretty well in Windows and Linux, and somewhat in OSX. It can do 
3d too, but not as well as opengl.

http://planet.plt-scheme.org/#allegro.plt

tfnood at gmail.com wrote:
> 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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