Re: fog question

[Frank C <li...@si...>]

On 14-Jul-04, at 6:10 PM, Keith Wiley wrote:

> Is there any way to make fog on work as a function of X and Z, and not 
> of
> Y?

Not currently, though you may be able to hack it in by talking to 
OpenGL directly (perhaps using GL_EXT_fog_coord).

> However, I would like a clear blue sky to be visible overhead.  I don't
> want the fog effect to drown out the sky dome object that will hang 
> over
> the entire environment even though that dome must be fairly far away in
> order to surround the entire area of the environment.

You can place the skydome in a display group with a fogstyle object 
that has it's visibility set to false. This will override the view's 
fog settings for your skydome. I find this works best if your 
skydome/box fades to the fog colour (or becomes transparent) as it 
approaches the horizon.

Frank.