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From: rsbx@cbmvax.commodore.com (Raymond S. Brand)
Newsgroups: comp.sys.amiga.graphics
Subject: Re: Layers bug
Message-ID: <18115@cbmvax.commodore.com>
Date: 26 Jan 91 03:06:39 GMT
References: <18901@shlump.nac.dec.com> <17628@cbmvax.commodore.com> <1991Jan25.003716.19167@msuinfo.cl.msu.edu>
Organization: Commodore-Amiga Inc, West Chester, PA
Lines: 23

In article <1991Jan25.003716.19167@msuinfo.cl.msu.edu>, jap@convex.cl.msu.edu (Joe Porkka) writes:
> limonce@pilot.njin.net (Tom Limoncelli +1 201 408 5389) writes:
> 
> >In article <1991Jan22.204914.7652@msuinfo.cl.msu.edu> jap@convex.cl.msu.edu (Joe Porkka) writes:
> 
> >Layers is based on a paper presented at SIGGRAPH a couple years ago.
> 
> Yes, but more than a couple years ago :-) Gotta be before '85.

The layers.library is based on a paper by Rob Pike of Bell Labs titled
"Graphics in Overlapping Bitmap Layers" published in ACM Transactions on
Graphics, Vol. 2, No. 2, April 1983, Pages 135-160; and possibly Computer
Graphics (SigGraph) as well. It's a very interesting paper but ignores some
important issues.

						rsbx

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