Program ended abnormally on 4/1/03 5:24 PM, Due to a catastrophic
LibraryMan error:
> Warp wrote:
> 
>> They don't stand for anything. They are names of coordinates in the
>>same way as x, y and z are.
>>
> 
> 
> Is there a 'w'?
> 

In theory, yes.  In POV, no.  "u" and "v" are used to give directions *on* a 
surface.  For example, in uv_mapping, they are used to align a texture with the 
surface of the object; "w" would be perpendicular to the surface, so it does not 
play a part in the alignment of the texture.  In a FEA package, on the other 
hand, "w" could be used internally to compute the density variation inside an 
individual element along a third dimension.

-- 
/*Francois Labreque*/#local a=x+y;#local b=x+a;#local c=a+b;#macro P(F//
/*    flabreque    */L)polygon{5,F,F+z,L+z,L,F pigment{rgb 9}}#end union
/*        @        */{P(0,a)P(a,b)P(b,c)P(2*a,2*b)P(2*b,b+c)P(b+c,<2,3>)
/*   videotron.ca  */}camera{orthographic location<6,1.25,-6>look_at a }

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