home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Cream of the Crop 21
/
Cream of the Crop 21 (Terry Blount) (October 1996).iso
/
image
/
mand56a.zip
/
MANDEL.DOC
< prev
next >
Wrap
Text File
|
1996-09-01
|
33KB
|
682 lines
Mandelbrot/Julia
Set Generator
Operating and Reference Manual
Shareware 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 process.)
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 m