Can anyone remind me what vnormalize(<0,0,0>) used to return under
previous betas?

I'm trying to get some code (actually Ingo's "param.inc" macro) to work
the same under RC2 as it did before vnormalize(<0,0,0>) became an error.

The docs say "A/vlength(A)", so I tried replacing 
     #declare Norm=vnormalize(vcross(A,B));
with
     #declare Norm = vcross(A,B)/vlength(vcross(A,B));

V3.1 returned <0,0,0>. so I tried
   #if (vlength(vcross(A,B))=0)
     #declare Norm=<0,0,0>;
   #else
     #declare Norm=vnormalize(vcross(A,B));
   #end   

but neither of these produce images that look quite the same as in
previous betas.

-- 
Mike Williams
Gentleman of Leisure

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