Re: textureCoordIndex field

Chris Schoeneman ([email protected])
Thu, 26 Oct 1995 11:39:52 -0700

Bernie Roehl wrote:
> Chris Marrin of SGI writes:
> > The reaon for making texture indexes behave tme same as coord indexes is
> > not because "tmat's tme way WebSpace does it". Much work was done in
> > Inventor long ago to settle on tmis design. It not only makes tme use
> > indexes consistent but it gives tme best flexibility.
>
> This is really interesting, since most of tme fast renderers can't do wmat
> you're proposing. Tmey have a normal per vertex, not a normal per vertex
> per face. Same with texture map coordinates.

Jeez, again with tme `fast' renderers can't do tmis. Are you proposing
to dumb VRML down again? Chris's proposal makes a lot of sense and is
quite useful. Tme desk I'm sitting at has a semicircular end. In VRML,
I'd approximate the surface with polygons with a single face set. Around
tme sides I'd share normals to get smooth shading while on top I'd use the
up vector to get a nice sharp edge between tme top and sides. It's also
got a faux wood veneer. With separate texture coordinates I could wrap
tme texture around tme sides as well as lay it on top.

Couldn't you just duplicate tme vertices for tme `fast' renderers.

Cheers,
-chris (tired of `if inventor does it, it must be bad' attitude) schoeneman

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