Re: local lighting

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Angus Dorbie (dorbie++at++bitch.reading.sgi.com)
Wed, 9 Oct 1996 16:35:14 +0100


You can build the light effect into the database using vertex colouring
or texture information. This is an extremely common technique.

You could also use texgen if you want a pool of light which the ship
sails through. It could even include some directional component using a
distant source, it would also give you a better phong like effect compared
to vertex colouring, it would probably be more expensive than a local light
but with the right texture you could simulate lots of local lights with one
texgen.

Cheers,
Angus.

On Oct 9, 10:27am, Jude Anthony wrote:
> Subject: local lighting
> We are contractually obligated to provide lighted docks whenver we
> simulate night. We know that extra light sources use lots of system
> resources, so we're trying to find a way to reduce the impact. Can
> we apply a light to only selected geometry, or something similar? We
> thought about shading, but at night things get too dark to simulate
> lighting with that kind of an effect.
>
> Let me know if you come up with anything,
> Jude Anthony
> jude++at++p3.enzian.com
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