ifs - generate fractals with an IFS


       ifs -help
       ifs    [-infile string] [-width integer] [-height integer]
              [-border integer] [-its  integer]  [-skip  integer]
              [-term string] [-inv] [-mag integer]


       An  affine  fractal is computed via an Iterated Functional
       System.  The rules must be supplied from a file with  each
       line  consisting  of six values (A-F) such that the values
       of A-D describe a 2x2 matrix (A, B; C, D), while E  and  F
       describes a 2x1 column vector (E; F).


       -infile string
              Data input file.

       -width integer
              Width of the plot in pixels.

       -height integer
              Height of the plot in pixels.

       -border integer
              Number of pixels in border.

       -its integer
              Number of iterations.

       -skip integer
              Number of iteration to skip.

       -term string
              How to plot points.

       -inv   Invert colors?

       -mag integer
              Magnification factor.


       There  is a shell script called 'ifscma' supplied with the
       source code that has a simple interface that allows you to
       reference  sets of predefined rules by name.  You may also
       wish to see the author's book, "The  Computational  Beauty
       of Nature," for some more examples.


       No  sanity  checks  are performed to make sure that any of
       the options make sense.

       The maximum number of affine rules is  determined  by  the
       constant  MAXRULES,  which  you  may  need to adjust under
       exceptional circumstances.


       Copyright (c) 1997, Gary William Flake.

       Permission granted for any use according to  the  standard
       GNU ``copyleft'' agreement provided that the author's com-
       ments are neither modified nor removed.   No  warranty  is
       given or implied.

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