>> >  Smooth triangles can have normals of any length. It doesn't matter 
>> > what
>> > their length is. (AFAIK povray normalizes them internally when it 
>> > parses
>> > the smooth triangle.)
>
>> Well, it makes it hard to average them if they are all different
>> lengths.
>
>  Average them? What average are you talking about?

Dunno, the numbers would usually come from the faces,
and that's different numbers, doesn't matter much in POV.
It just seems wrong to me to call any vector a normal,
a normal is a direction, so the magnitude doesn't matter,
and hence it should be unit length.  I guess that's just
aethetics though.

Post a reply to this message