In article <3df2960d@news.povray.org>,
 "Apache" <apa### [at] yahoocom> wrote:

> Hey, that's very interesting stuff. I was thinking about some kind of JIP
> (Just In time Parsing) for POV-Ray. (I have been scanning and browsing
> through the source code today.) Only those parts of the scene that get
> intersected by rays should be parsed. But this will only pay off with really
> huge scenes with very large amounts of complex csg objects or other bounded
> objects.

The only way to tell if part of the scene will be visible is to parse 
it. If you haven't parsed an object you have no information about it to 
judge visibility from. Some kind of progressive parsing where you parse 
some information, determine visibility, and conditionally continue 
parsing would be possible, but speedup would be minimal, and the 
description language would be barely human readable. The result would 
probably be much slower because of the work for determining if the 
object affects the final image.

-- 
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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