I'm guessing that it's a texture painted across a "billboard" shape
always facing the viewer. Combining animated textures with particles
systems can look very cool. Of course I haven't done this myself and
I'm only speculating. :)
TBone
Michael P. McCutcheon wrote:
> I've been looking at various demos, like GLExcess:
>
>
>
> http://www.glexcess.com/
>
>
>
> Notice that in the demo there are many objects which resemble stars
> and suns. These are close up and bright...some of them even fade the
> whole screen to while.
>
>
>
> The thing I don't get is how do they do that?
>
>
>
> The closest thing to a star I've been able to make is illuminated
> spheres with an incresing transparency level as they get bigger...this
> sort of looks like a star but is TERRIBLY inefficient, and looks
> nothing like the bright, smoothly faded stars in that demo above (note
> particularly the star in the part where all the cubes are surrounding it)
>
>
>
> How in the world do they make those bright, smoothly faded flickering
> stars? It seems that you can't do this with just transparent
> spheres...any ideas or code samples? I want to write a space game and
> making stars like this is essential.
>
>
>
> Thanks for any advice...
>
>
>
> Michael P. McCutcheon
>
>
>
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