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Re: Loop Adaptive Subdivision Problem

Posted by ati3414 on March 14, 2005 at 00:01:09:

In Reply to: Re: Loop Adaptive Subdivision Problem posted by Settgast on March 04, 2005 at 15:54:53:

: You may want to look at my work
: "Adaptive Tesselation of Subdivision Surfaces"

Very interesting paper! Thank you for sharing it. I have done quite a bit of work on adaptively subdividing tensor product surfaces. In my work, I noticed that while the tesselation changes based on the distance to the viewer the normals have to be attached to points on the surface, any other combination produces a "shimmer" effect destrying lighting under animation. By contrast, subdivision surfaces subjected to subdivision (either fixed or adaptive) should exhibit this shimmering artifact since there is no symbolic representation of the final surface, each approximation producing new vertices, none of which residing on the same surface. Subdivision surfaces look more like a "rising dough", their curvature and detail increasing with each iteration. Have you noticed the shimmering in the lighting?

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: : You may want to look at my work : : "Adaptive Tesselation of Subdivision Surfaces" : Very interesting paper! Thank you for sharing it. I have done quite a bit of work on adaptively subdividing tensor product surfaces. In my work, I noticed that while the tesselation changes based on the distance to the viewer the normals have to be attached to points on the surface, any other combination produces a "shimmer" effect destrying lighting under animation. By contrast, subdivision surfaces subjected to subdivision (either fixed or adaptive) should exhibit this shimmering artifact since there is no symbolic representation of the final surface, each approximation producing new vertices, none of which residing on the same surface. Subdivision surfaces look more like a "rising dough", their curvature and detail increasing with each iteration. Have you noticed the shimmering in the lighting?

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