Am 06.12.2013 19:12, schrieb Samuel Benge:
> clipka <ano### [at] anonymousorg> wrote:
>> POV-Ray has essentially the same problem: While it does know which
>> vertices belong to a given facet, it would need an exhaustive search of
>> the facets list to figure out which faces meet at a given vertex.
>
> Well how did the subdivision patch do it, then? As I recall it was very fast, at
> both subdivision and automatically calculating vertex normals. (I really miss
> that patch!)

I don't know that patch in detail, but it might have added extra data 
structures to keep track of the information required.

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