Re: Arbitrary derivatives


Larry Gritz <l...@...>
 

Well put, a very concise explanation of the basic idea.

-- lg


On Jan 19, 2010, at 7:09 AM, Henri wrote:

No, it does automatic differentiation.

The overall idea is that if your inputs know their derivatives ( for
instance, when raytracing a primitive, computing P, dP/dx and dP/dy is
easy )
and your shading library know how to differentiate all its operators,
you are able to maintain derivatives quantities while shading.

Look at http://jgt.akpeters.com/papers/Piponi04/ for a complete
reference.


Hopes this helps

Henri
--
Larry Gritz
l...@...

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