Re: [gl4java-usergroup] STATIC BACKGROUND

[Lamy Jean-B. <a1...@So...>]

Le Mercredi 28 Novembre 2001 07:58, vous avez =E9crit :
> Hi
>
> Thank you for the interest and the reply!!!
>
> I am doing exactly the thing you suggested (Texture Map the QUAD). I u=
sed
> to clear both the Frame buffer and the Depth Buffer; thanks to your
> suggesstion I now clear the DEPTH BUFFER only. As you suggested I have
> added the texture mapping and QUAD generating code to the display list=
.
> Thanks!!!!
>
> By the way the image I'm trying to load is 1024*1024!!!!
>
> I have included my code for the said operation. I you don't mind can y=
ou
> please point out where I can tweak my code. (Code is below...)
>
> Thank You
> Regards
> Asiri

You should not recreate your display list in every rendering !
Create it THE FIRST TIME ONLY, then re-use it !

Other consideration :

- Are you sure that it is the quad that take so long time to render, and=
 not 
the hexagone ?
- Are you using software 3D ? Software rendering is typically slowed dow=
n by 
texture changement, and speed is quasi proportionnal to the surface draw=
n (so 
a big quad may be VERY slow).
- 1024*1024 may be too big for a texture ? try smaller !

You can also disable some useless OpenGL flag when rendering the quad (e=
.g. 
lights, fog, depth test...); it may be a little faster (but probably not=
 a 
lot).

Jiba