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From: brucec%phoebus.phoebus.labs.tek.com@RELAY.CS.NET (Bruce Cohen;;50-662;LP=A;)
Newsgroups: sci.virtual-worlds
Subject: Re: Reading text in virtual reality?
Message-ID: <BRUCEC.90Aug16120816@phoebus.phoebus.labs.tek.com>
Date: 16 Aug 90 19:08:16 GMT
References: <25797@cs.yale.edu>
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In-Reply-To: jellinghaus-robert@CS.YALE.EDU's message of 13 Aug 90 02:26:51 GMT


In article <25797@cs.yale.edu> jellinghaus-robert@CS.YALE.EDU (Rob Jellinghaus) writes:
> ...
> 
> Has anyone done any work on smooth, realistic rotation of text?  Almost
> all the 3D graphics stuff I've ever seen specializes in blitting
> lots of polygons with good shading effects, which doesn't seem very 
> applicable to the special problems text presents.
> 
Yes, a lot of work has been done.  This is essentially an anti-aliasing
problem, with image-processing sorts of solutions.  See, for instance:

@Article{,
  author = 	"Crow, Frank C.",
  title = 	"The Use of Grayscale for Improved Raster Display of Vectors
  and Characters",
  journal = 	"Siggraph Proceedings",
  year = 	"1978",
}
% The copy of the article I have doesn't have any publishing information.

@Article{,
  author = 	"Wieman, Carl F. R.",
  title = 	"Continuous Anti-Aliased Rotation and Zoom of Raster Images",
  journal = 	"Siggraph Proceedings",
  year = 	"1980",
}

@Article{,
  author = 	"Warnock, John E.",
  title = 	"THe Display of Characters Using Gray Level Sample Arrays",
  journal = 	"Xerox Technical Report CSL-80-6",
  year = 	"1980",
}

There are some more recent papers, but I haven't gotten them out of the
boxes since the last move.  I seem to remember one by Maureen Stone of
Xerox PARC three or four years ago.

> Also, has anyone noticed the parallels between the discussions we've
> been having here about virtual space and navigation therein, and the
> work that's been done on hypertext information spaces?  In both contexts
> there is a lot of stuff in the world, and you need to be able to know
> where you are and where you want to be.  Maybe the two fields will inter-
> breed at some proximate date.
> 

Yes, I noticed it because I recently spent a year building a hypertext
system for software documentation, adn I had to spend quite a bit of time
both researching the literature and thinking about navigation.  The two
problems are really one; IMHO hypermedia will become VR as the number and
complexity of the input and output modalites increase.
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Bruce Cohen, Computer Research Lab        email: brucec@tekcrl.labs.tek.com
Tektronix Laboratories, Tektronix, Inc.                phone: (503)627-5241
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