In article <40b24060@news.povray.org>, Warp <war### [at] tagpovrayorg> 
wrote:

>   If you need all the intersections, wouldn't that slow down rendering
> of meshes?

No. You only need all the intersections if the mesh is transparent and 
non-refracting, otherwise, just grab the first intersection, and if it 
comes before the last intersection in the list, use it to terminate the 
list. And in the case where all intersections are needed, finding all 
intersections at once will still be faster than finding the first 
intersection multiple times.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: <chr### [at] tagpovrayorg>
http://tag.povray.org/

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