%GENERAL INFORMATION
%
%   FRACTORY is an interactive visally-oriented tool
%designed to help the user create fractal images.  The
%fractals are generated by the method of Iterated Function
%Systems (for a complete description, see Chap 5, Sect ? of
%"Invitation to Dynamical Systems" by Ed Scheinerman).  An
%Iterated Function System (IFS) consists of several linear 
%transformations which map the unit square to a subset of 
%itself.  In this program, such a 2-dimensional transfor-
%mation (referred to herein as a "square" or a "function")
%is represented by the image of the unit square under it,
%which appears in the form of a parallelagram, possibly a
%rectangle or square.
%   An IFS consists of at least two (usually more) such
%transformations.  In this program, these functions are
%represented (and uniquely determined) by where the points
%X=(0,1), Y=(0,0), and Z=(1,0) are mapped to (i.e. their
%image under the function).  Note that the standard
%mathematical representation of such a function is the
%2-dimensional linear transformation Ax+b.
%   The fractal is drawn using a randomized algorithm (also
%described in the aforementioned text).  This algorithm
%takes a point, randomly chooses a function from the IFS,
%applies that function to the point, and then repeats the
%process on the resulting point.  After the first few such
%points, all resulting points are (at least to within the
%precision of a computer screen) in the fractal.  The
%fractal is drawn by plotting all but the first few of
%these points.
%   FRACTORY consists of a CONTROL PANEL with numerous
%controls (see individual HELP topics) and a GRAPHICS
%WINDOW (see separate HELP listing).  Most modifications
%to the functions are made on the Control Panel, although
%some manipulation is also possible from the Graphics
%Window.