clipka wrote:
>   sqrt(
>     Sqr( F(x-D,y,z) + F(x+D,y,z) - 2*F(x,y,z) ) // squared curvature X
>     Sqr( F(x,y-D,z) + F(x,y-D,z) - 2*F(x,y,z) ) // squared curvature Y
>   )

Also, there's supposed to be an operator between the first and second 
instances of the function "Sqr". Which operator is it?

-Mike

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