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Hi Seb,
many thanks and my appreciation for your answer. I understand now the 3
vectors version.
But what is a 4 vectors version? What is the NORM doing and about?
Sven
"Mr Seb" <ban### [at] wanadoo fr> schrieb im Newsbeitrag
news:446cd71f@news.povray.org...
> For the 4 vectors version :
> use as follows :
> #declare coord=trace(Object,<X,100000,Z>,<0,-1,0>,norm)
> it returns in coord the same vector than in the first example. It also
> return the normal vector at this point in "norm"
>
>
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