In article <403f5224@news.povray.org> , Wolfgang Wieser <wwi### [at] gmxde>  
wrote:

> The 1e-14 is just there to prevent a division by zero in
> case the isosurface has zero gradient (along the ray) at the
> intersection. Maybe we can even use smaller values.

You really don't want an unnecessary division is such heavily used code.
Doesn't "len" provide you with all you need?

    Thorsten

____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

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