Martin Reddy (mxr++at++dcs.ed.ac.uk)
Wed, 9 Apr 1997 16:00:25 +0100 (BST)
For an alternative method to the DVR approach, you may like to take a look
at some of the work that the guys at Georgia Tech GVU Centre did. They
implemented a system to evaluate the effect of a degraded periphery in
head-mounted displays.
Their technique was basically to use two rectangular polygons: one for the
periphery (covering the entire screen), and one for the high-detail inset
(covering a smaller region in the centre of the screen). The high-detail
inset was blended into the periphery using alpha blending to smooth over
the boundary. The scene was then rendered into a texture map and that
texture applied to the appropriate polygon. (They used IrisGL and a local
graphics library called SVE.)
This would probably be interesting work for you to refer to anyway by the
sounds of it (if you have not already done so). The appropriate reference
is:
Watson B., Walker N. and Hodges L. F. (1995). "A User Study Evaluating
Level of Detail Degradation in the Periphery of Head-Mounted Displays"
Framework for Interactive Virtual Environments (FIVE'95) Conference,
London, December 18-19.
You can download a copy of the paper from the project page at:
http://www.cc.gatech.edu/gvu/virtual/Detail_Inset/
Cheers,
Martin.
+============================================================================+
| Martin Reddy Dept. of Computer Science |
| University of Edinburgh |
| e-mail : M.Reddy++at++ed.ac.uk Mayfield Road, EH9 3JZ |
| http://www.dcs.ed.ac.uk/~mxr/ Tel : +44 131 650 5164 |
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