Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!usenet.ins.cwru.edu!mephisto!gatech!dcatla!mclek
From: mclek@dcatla.UUCP (Larry E. Kollar)
Newsgroups: comp.graphics
Subject: Re: Mandelbrot algorithm summary
Keywords: mandelbrot algorithm
Message-ID: <29668@dcatla.UUCP>
Date: 8 Feb 90 14:12:09 GMT
References: <5480@vax1.tcd.ie>
Reply-To: mclek@dcatla.UUCP (Larry E. Kollar)
Organization: DCA Inc., Alpharetta, GA
Lines: 23

In article <5480@vax1.tcd.ie> cbuckley@vax1.tcd.ie (Colm Buckley) writes:
     
> One of the most interesting [ optimizations ]
> suggests looking for a
>rectangle with all edge pixels the same colour, and filling it in, on the
>assumption that, if the edge is solid, then the interior is too.

One of the newest Amiga Mandelbrot generators goes beyond that.  It traces
around any "black" region it finds, fills it in, and moves on.  The program
doesn't bother tracing other colors, on the assumption that you wouldn't save
enough time doing other regions to make that worthwhile.

The normal unzoomed view takes only a few minutes to draw on a stock
68000-based Amiga using a 16-color screen.  Best of all, the source (JForth)
is available.  Amigans can find this on Fish disk 2?? (the one with the
JGoodies programs -- #237 seems to come to mind, although I think that's
too early), or the JGoodies #1 disk from Delta Research.

Send email if you want more info.  I'd rather not email 3000 copies of the
program, but I'd consider snail-mail if you send a disk and return postage.
-- 
Larry Kollar	UUCP ...!gatech!dcatla!mclek		VoiceMail:One  2670
Georgia 400:  the Southeast's premier 48-mile 4-lane dragstrip.