
GFORGE  -   Graphical Fractal Forgery                   v1.2   jpb 12/16/95

Generates 16-bit heightfields for POV-Ray or Polyray, using a high-quality
algorithm:  the IFFT of 1/f noise.  Several parameters give you control over
the appearance of the output, which can range from sand to hills to
mountains.  Run the "sample" script to see examples of the output possible.

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This is the DOS version which does not include source, to save space.  The
source code is available, just download gforge-1.2a.tar.gz from my web page
(or search ARCHIE). I used the freeware DJGPP Unix-ish compiler for DOS to
make the DOS executable.  You can get DJGPP yourself for free from
ftp://oak.oakland.edu/ among other places.

You need GO32.EXE somewhere in your path to run. If you just leave it
in the same directory as GFORGE.EXE it will work fine. If you have some
other, older version of GO32.EXE in your path somewhere, there may be
problems. You can check which version you've got by typing "go32" at
the dos prompt with no arguments.  If GO32 reports that it's a version
earlier than 1.12.maint3 (compiled Dec. 18 1994) then you've got some
different version hanging around. The version distributed with
gforge.exe is the aforementioned one.

Try running the "gen-tga" script to generate some example TGA
heightfields ready for rendering in POV-Ray, or the "gen-pgm" or
"gen-png" scripts to generate files for viewing directly.  For 
viewing, I use QPV v1.6c by Oliver Fromme, a great shareware 
viewer which handles PNG format as well as most everything else.
DISPLAY v1.88 is also good; it's slower, but it's free; it handles an
even wider range of images and can convert between formats.

There are a few .pov and .pi scripts to get you started with raytracing your
heightfields. Moon.pi requires Polyray v1.8, available from 
  ftp://ftp.povray.org/pub/polyray/

Read "whatsnew" to find out what features have been added recently.
Read "gforge.txt" for details on the command-line options.

Authors:
	John Beale                      Heiko Eissfeldt
	P.O Box 8188                    <heiko@colossus.escape.de>
	Stanford CA 94309-8188
--------------------------------------
  email: beale@jumpjibe.stanford.edu
<http://www-leland.stanford.edu/~beale>

