On 18 Jul 2000 10:14:49 -0400, Warp wrote:
>  I was actually thinking about all the objects as a whole. If you have several
>objects, I think povray has to test the ray with all of them to see which
>surface is closest?

Yes, though the various bounding strategies try to minimize that.

>  And btw, wouldn't it be equally easy for meshes and isosurfaces to find
>the farthest intersection?

Probably.  If nothing else, you could project the ray to the other side of the
object's bounding volume and trace it backwards.

-- 
Ron Parker   http://www2.fwi.com/~parkerr/traces.html
My opinions.  Mine.  Not anyone else's.

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