Re: [Plib-users] bump maps

[Steve B. <sjb...@ai...>]

Larry Hess wrote:

> Has anyone try do bump map with plib

Not that I know of.

It's hard to do portably - but for some specific cards, it's not
all that hard...you could probably do it without a change to PLIB
if you have GeForce because it's just a matter of setting some state
in the pre-draw callback and undoing those changes in the post-draw.

The biggest issue is that you rarely want *just* a bump map - typically
you need a colour map also.  That gets us into the whole business of
supporting multiple texture maps - which *is* a big deal.

This is clearly something we have to address though - graphics cards
are increasingly supporting more and more sophisticated multi-pass
renderers.

In order to do this portably, I think we'll need to implement a 'shader
language'...something along the lines of SGI's new shader-compiler - which
I believe was just added to Performer.


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