Hi Terry,
On Mon, 2005-06-20 at 11:54 -0500, Terry Welsh wrote:
>
> Dynamic branching makes for slower shaders, but I am in favor of it
> for the project I am working on because light sources may frequently
> change in number and type. Since GLSL shaders must simulate the
> complete lighting environment in a scene, turning on one light would
> mean recompiling every shader in the scene. This could cause really
> ugly pauses.
Not necessarily, that's what I meant with caching. If you switched
between different configurations only the first change would need a
recompile, the next ones would be fast (until the cache overflows).
In general, if the change is triggered by a user interaction, I'd prefer
a little hickup and faster general performance over immediate changes
and slower performance. Things might be different if the changes happen
automatically and very often, though.
Dirk
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