>  What I've been thinking is to check the angles of the normals on the
> four points of the polygon. If one angle is bigger or smaller that a
> certain given angle, or deviates too much from the average, subdivide
> the polygon. Problem will probably be finding the threshold when to
> start subdividing / taking more samples. Especialy for more complex
> surfaces like sperical harmonics.
>  http://www.lifesmith.com/spharmin.html

Yes, it's somewhat the same thing, but your way seems even better since it could
be used for different kind of surfaces and not only this one...

Simon

-- 
||  'How do you know I'm mad?' said Alice.
||  'You must be,' said the Cat, 'or you wouldn't have come here.'
--
 Simon Lemieux  (lem### [at] yahoocom)

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