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- Newsgroups: comp.graphics
- Path: sparky!uunet!destroyer!ubc-cs!news.UVic.CA!ugly!abucior
- From: abucior@ugly.UVic.CA (Alan Bucior)
- Subject: SUMMARY: Ray Tracing Height Fields
- Message-ID: <1992Aug18.162139.4911@sol.UVic.CA>
- Sender: news@sol.UVic.CA
- Nntp-Posting-Host: ugl-gw.uvic.ca
- Organization: University of Victoria, Victoria, BC, Canada
- References: <713996198snx@nexnix.demon.co.uk> <1992Aug18.152925.3600@canon.co.uk>
- Date: Tue, 18 Aug 92 16:21:39 GMT
- Lines: 30
-
- Thanks to everyone who responded regarding my post asking about how
- to ray trace height fields. To summarize, here are the two main sources
- that I've found to be most useful:
-
- "Grid Tracing: Fast Ray Tracing for Height Fields" by F. Kenton Musgrave
- is a good starting point to look over, but his method is not the fastest.
- It is available online via ftp from princeton.edu. The document
- is in pub/Graphics/Papers and is called musg88.ms.Z
-
- Special thanks go to Eric Davies at the University of Waterloo for pointing
- me to my second source:
- "Parametric Height Field Ray Tracing", by David W. Paglieroni, and Sidney
- M. Peterson is published as part of the Graphics Interface '92 Proceedings.
- They discuss different ways to optimize height field ray tracing and explain
- their technique which they claim:
- "The parametric method ran roughly 40 times faster than the
- incremental method and roughly 6 times faster the hierachical
- method."
- Although I haven't fully read the document yet, I believe Musgrave's method
- to be the incremental method (though I could be, and probably am, wrong).
-
- Thanks again to all those who responded!
- Al.
-
-
-
-
- --
- Alan Bucior | University of Victoria
- abucior@sirius.uvic.ca | Victoria, British Columbia, CANADA
-