home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!ogicse!usenet.coe.montana.edu!news.u.washington.edu!milton.u.washington.edu!hlab
- From: thinman@netcom.com (Technically Sweet)
- Newsgroups: sci.virtual-worlds
- Subject: TECH: on real-time texture mapping
- Message-ID: <1992Jul26.074450.8737@u.washington.edu>
- Date: 24 Jul 92 19:04:39 GMT
- Article-I.D.: u.1992Jul26.074450.8737
- References: <BrrpoH.I5H@watserv1.waterloo.edu> <1992Jul24.051008.17131@u.washing
- Sender: news@u.washington.edu (USENET News System)
- Organization: International Foundation for Internal Freedom
- Lines: 51
- Approved: cyberoid@milton.u.washington.edu
- Originator: hlab@milton.u.washington.edu
-
-
- I stand corrected. Mip-mapping operates by storing successively
- larger square pixmaps which are manufactured from a given input pixmap.
- To resample these maps to an arbitrary plane, you pick the appropriate
- mipmap from the size of the target planar surface, calculate the
- coordinates (called s and t) into the mipmap, and pull out the
- required pixels. The output will look nicer if pixels from
- different mipmap levels are interpolated. Here are references
- for mipmaps and a competitive technique, summed-area tables.
- (My informant prefers the latter, and mailed example source code
- for doing the pixel lookups. I'm checking with him on a source
- code release.)
-
- On mipmaps:
-
- @INCOLLECTION {heckbert91,
- AUTHOR = "Heckbert, Paul S. and Moreton, Henry P.",
- TITLE = "Interpolation for Polygon Texture Mapping and Shading",
- BOOKTITLE = "State of the Art in Computer Graphics, Visualization and Mo
- deling",
- PUBLISHER = "Springer Verlag",
- YEAR = 1991,
- EDITOR = "Rogers, David and Earnshaw, Rae"
- }
-
- @TECHREPORT{ tmpip,
- AUTHOR = "Heckbert, Paul S.",
- TITLE = "Texture Mapping Polygons in Perspective",
- INSTITUTION = "Computer Graphics Lab, New York Institute of Technology",
- YEAR = 1983,
- NUMBER = 13,
- MONTH = "April"
- }
-
-
- On summed-area tables:
-
- @ARTICLE{summedtables,
- AUTHOR = "Crow, Franklin C.",
- TITLE = "Summed-Area Tables for Texture Mapping",
- JOURNAL = "Computer Graphics",
- YEAR = "1984",
- VOLUME = "Vol. 18",
- MONTH = "July"
- }
-
- --
-
- Lance Norskog
-
- Data is not information is not knowledge is not wisdom.
-