Re: [PyOpenGL-Users] Aliasing changes when I have a white background

[Greg E. <gre...@ca...>]

Rick Muller wrote:
> The basic way I'm updating my screen is:
> 
>         #anti-aliasing code
>         glEnable(GL_BLEND)
>         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
>         glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE)

You're turning on smoothing for lines here, but your
images look like they're made up of filled polygons.
Line smoothing has no effect on polygon rendering.

So I think you're not getting any anti-aliasing at
all, and the black/white difference is just because
the eye doesn't notice it so much against a black
background.

There is an option for smoothing polygons, but using
it correctly is viciously difficult. Unless you're
pushing the limits of rendering speed, FSAA is by
far the better way to go.

--
Greg