In article <36FC1532.6F427660@club-internet.fr> , Vincent Chevrier 
<vch### [at] club-internetfr>  wrote:

> - The second question deals with 2D vectors. Why is vlength(2*u)
> different from vlength(VectA), with VectA=2*u? (u=<1, 0>)
>
> #declare vectA = 2*u;
> #declare vectB = <2, 0>;
> #debug concat(str(vlength(2*u),1,1), "  -  ", str(vlength(vectA),1,1),
> "  -  ", str(vlength(vectB),1,1))
>
> gives :    2.0  -  3.5  -  3.5

I suppose you are using the Windows version, right?  Then it is likely a
Windows POV-Ray bug because on the Mac this prints as expected: three times
2.0.


    Thorsten


____________________________________________________
Thorsten Froehlich
e-mail: pov### [at] csicom

I am a member of the POV-Ray Team.
Visit POV-Ray on the web: http://www.povray.org and
http://ourworld.compuserve.com/homepages/povraymac/

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actually, on my win 3.1e it gives :
-nan - 2.0 - 2.0 
So I think my first reply was a bit hasty.



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