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MANDEL.HLP
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1996-09-01
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Mandelbrot/Julia
Set Generator
Operating and Reference Manual
Version 5.6
Installation
The Mandelbrot/Julia Set Generator program
requires an IBM compatible computer with at least 512K
of memory, a VGA display and a Microsoft compatible
mouse. The installation process is quite easy. (Users
obtaining .ZIP files from the Internet or a BBS can
skip this installation section.)
First, make a backup copy of your Mandelbrot/Julia
Set Generator program disk. If necessary, consult your
PC-DOS/MS-DOS manual for a description of the Diskcopy
command. Save the original program disk in a safe
place and use the copy as the working program disk.
Second, while it is possible to use the
Mandelbrot/Julia Set Generator on a floppy disk
system, a hard disk system is a necessity if you wish
to store a number of image files. To install the
Mandelbrot/Julia Set Generator on a hard disk use the
following steps:
1. Insert the floppy disk in your computer in
drive A. (or B if necessary)
2. Type A: (or B:)
3. Type INSTALL A C
Any hard drive letters can be used, for example
INSTALL B D will install the program from floppy drive
B to hard drive D. The installation will create a
directory called MAND5 on your hard drive and you will
need to enter a CD\MAND5 to change to the
Mandelbrot/Julia Set Generator directory before
running the program. Once installed just type MAN to
start the program. All the files for Mandelbrot/Julia
Set Generator need to be in the same directory for the
program to operate successfully.
Quick Start for Impatient New Users
Type MAN to start the program. After the mouse
cursor appears click it on the Load Image button at
the left. When the window appears with the list of
image file names, simply clicking on one of them will
display the image using the current color mask. If the
image file contains a specific color mask filename it
will be automatically loaded prior to displaying the
image. Most commands can be interrupted by a simple
mouse click.
The zoom window feature is started by double
clicking on the displayed image. Once the zoom window
appears, with its crossed center lines, it can be
moved by holding down the left mouse button, while the
cursor is inside the zoom window, and positioning the
window. The zoom window size can be increased or
reduced by holding down the left mouse button and
moving the mouse cursor horizontally while it is
outside the zoom window. Once correctly positioned the
mouse cursor should be clicked on the right gray
panel, which will store the changed dimensions. The
zoom window can be abandoned by clicking the mouse
cursor on the left gray panel. Be careful not to drag
the mouse cursor onto the gray panels while resizing.
The Set Values button should be clicked on next, and
the image file name changed. If this is not done the
original image file will be erased. Clicking on the
Make Image button will start the generation of the new
zoomed image.
The Command Buttons and Their Function
Set Values
The Set Values command allows the user to set the
initial parameters that will be used by the
Mandelbrot/Julia Set Generator to begin generating a
new image. These values are also available for
inspection when an image has been displayed. The
values and their range are:
Item Range
-----------------------------------------------------
X center value -10 to 10
Y center value -10 to 10
Magnification >0
A value (if a Julia image) -10 to 10
B value (if a Julia image) -10 to 10
Dwell 1 to 8191
Image width in pixels 10 to 4800
Image type [M J] M or J
Full/Partial image [F P] F or P
Default color mask file xxxxxxxx.MSK
Display type [0 1] For future use
256 color palette number For future use
Image file name xxxxxxxx.MAN
or xxxxxxxx.MAR
To change a value simply click inside the
rectangle where the value is displayed and then key in
a new value or file name. File name extensions must be
.MSK for color masks, .MAN for regular images and .MAR
for those that are recursive.
The A and B values are only displayed with Julia
images. If the recursive image generator is used the
image width must be a member of the 2^n set, ie. 16,
32, 64, 128 etc. The program maintains the
Full/Partial image status and these values cannot be
changed by the user.
Color Masks
When the Color Masks command is chosen a popup
window presents the four options:
Create/Display color mask
Select color mask
Select palette
QUIT
Clicking on the Create/Display color mask option
allows the user to create, edit and save color masks.
Clicking on the Color mask file name box allows
you to type in a file name. The file name must have
the extension .MSK or you will not be able to select
it later. Ranges of dwell values should be typed into
the squares on the left. Just click on the square,
type in a dwell value and <Enter>. The colors are
selected by clicking on the desired color of the color
wheel in the upper right and then clicking on the odd
and even boxes at the right. The selected color is
displayed between the circular menu and the color
wheel. If the first line of the color mask reads:
0 9 [blue box] [white box]
then dwell values from 0 to 9 will be colored blue if
odd and white if even. If a solid color is desired the
color boxes should be filled with the same color. The
end of a color mask should be designated with a
negative value entered into the first dwell box. The
default color mask on startup is M1.MSK and its values
are:
Dwell Range Odd color Even color
-----------------------------------------------
0 9 [blue box] [white box]
10 19 [red box] [red box]
20 510 [yellow box] [yellow box]
511 511 [black box] [black box]
-1
In the case of M1.MSK, any dwell values larger
than 511 will be colored black (color 0 in the default
palette).
The circular menu at upper left has four options.
Clicking on the up or down arrow jumps to the previous
or next 16 color mask entries. A total of 256 entries
can be placed in one color mask. The SAVE option
stores the color mask currently displayed under the
name specified in the Color mask file name box. The
new color mask becomes the currently selected color
mask.
Clicking on the Select color mask option presents
the user with a large window and the names of the
color masks that have been stored. Clicking on a color
mask name will select and load that color mask. It
then can be viewed by selecting the Create/Display
color mask option.
Clicking on the Select palette option opens a
window that displays the current VGA color palette of
16 colors. Clicking on the Default box will load the
default VGA color palette. Clicking on the arrows will
select other prestored color palettes, up to number
57.
The QUIT option returns the user to the main menu.
Make Image
Selecting the Make Image command generates a
Mandelbrot or Julia image based upon the parameters
entered in the Set Values command. A warning is issued
before the generation begins to allow the user to
change the file name, as any existing file of this
name will be erased.
A very simple way to generate images is first to
use Load Image to display a previously generated
image. Double clicking on the image will produce a
zoom window overlaid on the display. Clicking and
holding down the left mo