%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%  File:     help.txt
%  Purpose:  Help file for Recursive Picture
%  Author:   Jeff Edmonds
%  Location: York University
%  Email:    jeff@cs.yorku.ca
%  Date:     Jan, 1996
% --------------------------------

Recursive Picture Drawer
========================

A figure is specified by a set of lines, circles, and arcs
and by two points that are referred to as the "handles". In draw mode,
the figure can be drawn on the screen. Press the mouse button down in
one location, continue to hold the button down while moving the mouse,
and lift the button in a second location. The figure is translated,
rotated, and scaled so that the two handle points of the figure land
on the two points that you have specified.

A recursive picture is specified by a "base case" figure, a "nonbase
case" figure, by a set of "places to recurse", and by an integer "n".
If n=1, then the base case figure is drawn. If n>1, then the nonbase
case figure is drawn. As well, the location on the screen (specified
by two points) of each place to recurse is determined. Then
recursively the same picture is drawn at these locations but with the
value n-1.

Description of Menus and Buttons
=================================
File
  New, Open, Save, Save As  base/nonbase:
     Loads and saves to a file the description of the recursive
     picture (but not locations on the screen that it is drawn)
  Clear Screen: 
     Clears where picture is drawn (but not current recursive picture)
     
Edit Mode
  Allows you to create and modify a recursive picture
  Buttons:
    line, 2*circle, arc, places to recurse: 
      Adds object to either base case or nonbase case figure
    X-Delete: Deletes specified object
    X-Delete Last: Deletes last object added
    Grid: adds grid lines to help with placement

Draw Mode
  Allows you to draw the recursive picture
  Buttons: set value of n  
   
Hand In Mode
  Produces display to hand for homework.
  Contains the base and nonbase case figures and the resulting picture
  If you come from Draw Mode, the drawing in Draw Mode is lost.  You must
  draw directly in this mode to get the drawing plus the base and recursive
  figures.

Help Mode
  Refers to this message -- Does not work at the time this was written.
  Just clears the drawing area.