home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.graphics
- From: andy@osea.demon.co.uk (Andrew Haveland-Robinson)
- Path: sparky!uunet!pipex!demon!osea.demon.co.uk!andy
- Distribution: world
- Subject: Re: Faster ray intersector for POV
- References: <BzF6v7.Equ@plato.ds.boeing.com>
- X-Mailer: cppnews $Revision: 1.14 $
- Organization: Haveland-Robinson Associates
- Lines: 53
- Date: Fri, 18 Dec 1992 15:30:37 +0000
- Message-ID: <724717837snx@osea.demon.co.uk>
- Sender: usenet@demon.co.uk
-
-
- In article <BzF6v7.Equ@plato.ds.boeing.com> coy@plato.ds.boeing.com (Stephen B Coy) writes:
-
- >In article <724573602snx@osea.demon.co.uk> andy@osea.demon.co.uk (Andrew Haveland-Robinson) writes:
- >>I haven't been through the code in detail, but there must be a few loops
- >>that could be unwound a little. The sluggishness comes from multiplatform
- >>code I guess.
- >
- >In general ray tracing is a slow process. Right now the best way to
- >get the most speed out of POV is to make sure that your objects use
- >bounding boxes to help speed things up. If you are render polygon
- >objects you should be using raw2pov which automatically adds the
- >bounding heirarchy. Many people have reported 10-15 times speedups
- >with this. Currently the POV developers are looking into adding
- >automatic bounding for a future version. Until then you'll either
- >have to do it by hand or use a different ray tracer like RayShade,
- >Vivid, Bob, or MTV.
- >
- >Stephen Coy
- >coy@plato.ds.boeing.com
- >
- >author of Vivid & Bob
- >drinker of fine ales
-
- Indeed Stephen - remember the Vivid/POV polygon benchtest I sent you??
- I haven't come across raw2pov before though.
-
- Are raw files of the format:
-
- 1
- 4 4 3 4
- 1. 1. 5
- 1. 1. 4
- 1. 1. 3
- 1. 1. 2
- 0. 0. 0.
- 1. .55 0.
- 0. 1.1 0.
- 333 .55 1.
- 3 1 1 2 4
- 3 2 2 3 4
- 3 3 1 4 3
- 3 4 1 3 2
-
- Cheers
- Andy.
-
- +-----------------------------------------------------------------------+
- | Haveland-Robinson Associates | Email: andy@osea.demon.co.uk |
- | 54 Greenfield Road, London | ahaveland@cix.compulink.co.uk |
- | N15 5EP England. 081-800 1708 | Also: 0621-88756 081-802 4502 |
- +-----------------------------------------------------------------------+
- > Some dream of doing great things, while others stay awake and do them <
-