Rune wrote in message <3a68a79a@news.povray.org>...
>"Wlodzimierz ABX Skiba" wrote:
> > how normals are calculated ?
> > did you considered my method sended for you to p.a-u ?
>
> I didn't understand your symbolic code.

ough, advenced english is my biggest problem
I can try describe something more if you wish
just go back to this thread and show me where you want explanations

> I find points on the plane perpendicular to the input normal, then deform
> those points, and then find the deformed normal which is the vector
> perpendicular to the deformed points on the plane.
> I believe you used n points in your method. I find 4 to be sufficient.


The main difference beetween my method and your is that you (as I understand)
simply average normals after deformation. You forgot that deformation is not
linear and strength of deformation on one side of normal vector can be different
on the other side. In my method I use weighted averaging dependant of area of
triangles described by deformed perpendicular vectors. As I show some day in
p.b.i this weighted method is more accurate.

ABX

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