[gl4java-usergroup] Re: accumulation buffer

[aNt <an...@to...>]

gezza's.

>
>is it right using the accumulation buffer is really _slow_ ?
>

arrr indeed. but then I set up my GeForce2Ultra to OpenGL and it flys.

>
>I'm trying to use the accum buffer because I need to set an alpha value to=
 a
>fixed display list with glColor's in it. With the accum buffer I should be
>able to add an already rendered display list with any alpha by glAccum
>(GL_ADD, alpha), right ?

that=B9s the one. u could also do the hack it to make things faster. make a
plain object and put it in front of your camera. make the plain object 30%
transparent. don=B9t clear the back buffer. and u will have the 30%
transparent shape do the clearing for u.

simple uh :)

>Is there a way to set the color (r,g,b) without setting the alpha too ?

theres: gl.glColor3f(r, g, b); and gl.glColor4f(r, g, b, a); all in them
there docs :).


tops

aNt