In article <376f21dc@news.povray.org>, Nieminen Mika <war### [at] cctutfi> wrote:
>Jerry <jer### [at] acusdedu> wrote:
>: it allows you to find the minimum and maximum "bounds" of any object
>  I'm curious about how does it work.
>  For example, how can it find the boundaries of a poly, a blob, a bicubic
>patch or even a difference csg? What about infinite objects?
>  Or is it just an approximation?

Ask Ron, but  I believe that what it does is just return POV's
pre-calculated bounding box, which is used to determine whether or not a
ray *might* be hitting this object. My experience has been that it works
perfectly on text; I've never tried it on a plane, that would be
interesting...

Jerry

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