"Tor Olav Kristensen" <tor### [at] TOBEREMOVEDgmailcom> wrote:
> "Bald Eagle" <cre### [at] netscapenet> wrote:

> > Still perplexed about why normal vector values would cause POV-Ray to report
> > degenerate triangles.
>
> Have you verified that none of the normal vectors are zero vectors or have a
> very short length ?

I have not - I was mostly just trying to get the code to _work_ in the short
blocks of time I had available to struggle with it.   I did not think it was
possible or probably, as the normal vector was calculated as a _sum_, implying
that the sum of all the vectors would have had to be very small or zero.  And I
was adding more vectors to code that previously worked....

But it had occurred to me to do that and I should do the checks.
I was just surprised that the normal triggered a degenerate triangle warning.

> Does POV-Ray accept the triangles in the mesh when you do not add the normal
> vectors ?

Yes.  In terms of the fact that I was using union {}, not mesh {}.


> - Or write code that does not create out of range indices...

That's just a patently absurd assertion.  ;P

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