Hi Ray

> I think the Zhang et al. paper that you're referring to is the one
> that is based on Gauss Maps. I was planning on doing something with too.

Nope not quite Gauss Maps are used by Gooch. Zhang uses something similair
a normal mask as rectangular cells and clustering. I think Gauss Maps
don't work correct with backface culling which was the primary target for
Zhang.

> Also, there are some smart seeding strategies using local coherence
> for classifying silhouette edges efficiently. But as I said, silhouettes

Yes I've heard of those. But speed isn't yet my primary target it should
work more or less.

> approach can sometimes produce wrong effects, for example, if the

Hmm could be some of the effects I'm seeing. My problem is that I don't
have the edge structure I've to build it by myself.

> polygonal edges are not exactly aligned. This is the reason why I sounded
> a wee bit hesitant about suggesting a solution for the curved surface
> of the cylinder.

Well the hardware approach works fine most of the time. But you don't get
edge data itself if you need it.

EOF,
 J.D.

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