Anfy IFS-fractals - Copyright (C) by Fabio Ciucci 1997/98


This applet renders fractals by recursivly calculating a fractal-tree that
morphs using sin and cos tabs. The applet is fully configurable for
fractal generation and color palette.

This applet is based on original code by Martin Zettergren, and is used
under license.

The following 2 ".class" files must be uploaded: AnFract.class and
Lware.class.

Insert the <applet> tag in your html document as follows to add this applet
to your page (Comments after the ";" symbol are code explanations and
acceptable min/max values. They are not part of the applet language):


<applet code=AnFract.class width=200 height=200>  ; Name, Width, Height
<param name=credits value="Applet by Fabio Ciucci (www.anfyjava.com)">
<param name=regcode value="NO">         ; Registration code (if you have it)
<param name=reglink value="NO">         ; Optional URL link when the applet
                                          is "clicked"
<param name=regnewframe value="YES">    ; Reglink opened in new frame?
<param name=regframename value="_blank">; Name of new frame for reglink
<param name=statusmsg value="IFS fractals applet">  ; Statusbar message
<param name=dimensions value="8">       ; Number of of iterations each branch
<param name=branches value="2">         ; Branches per iteration
<param name=morph_speed value="3">      ; Speed of morphs through shapes
<param name=rot_speed value="5">        ; Rotation speed within iterations
<param name=rot_speed2 value="-5">      ; Rotation speed of whole fractal
<param name=decline value="0.75">       ; Length decrease each iteration
<param name=length value="26">          ; Length of the starting line
<param name=pensize value="1">          ; Drawing pen size (1..3)
<param name=progress value="YES">       ; Progressive pen increase (YES,NO)
<param name=progrinverse value="NO">    ; Inverse progressive pen (YES,NO)
<param name=progrstep value="2">        ; Pen progression stepping
<param name=iterskip value="YES">       ; Half iter skipping ("YES" or "NO")
<param name=backimage value="NO">      ; Background image (image name or "NO")
<param name=backR value="0">           ; Background color (red component)
<param name=backG value="0">           ; Background color (green component)
<param name=backB value="0">           ; Background color (blue component)
<param name=ifsR1 value="255">         ; Fractal color 1 (red component)
<param name=ifsG1 value="255">         ; Fractal color 1 (green component)
<param name=ifsB1 value="180">         ; Fractal color 1 (blue component)
<param name=ifsR2 value="10">          ; Fractal color 2 (red component)
<param name=ifsG2 value="50">          ; Fractal color 2 (green component)
<param name=ifsB2 value="255">         ; Fractal color 2 (blue component)
<param name=overtext value="YES">      ; Fractal over text? ("YES", "NO")
<param name=overimg value="NO">        ; Optional image over applet
<param name=overimgX value="0">        ; Over image X offset
<param name=overimgY value="0">        ; Over image Y offset
<param name=memdelay value="1000">     ; Memory deallocation delay
<param name=priority value="3">        ; Task priority (1..10)
<param name=MinSYNC value="10">        ; Min. milliseconds/frame for sync
Sorry, your browser doesn't support Java. ; Message for no java browsers.
</applet>                              ; End of applet tag

                             ---------


The following instrcutions detail how to change parameters:

Note: attempting to alter the "credits" parameter will disable the applet.

To activate the "reg" parameters read the shareware registration notes.
In the "regcode" parameter, place the registration code you
purchased from the author. If the code is correct and the applet is run from
the registered domain name, you can use "link" parameters to link to a URL
when the applet is "clicked".

If you set "regnewframe" to "YES", you can specify a specific frame location
for the reglink:

"_blank"  : To load the link in a new blank unnamed browser window.
"_self"   : To load the link into the same window the applet occupies.
"_parent" : To load the link into the immediate FRAMESET parent.
"_top"    : To load the link into the top body of the window.

You can also set a custom frame name, such as "myframe1".

With the "overimg" parameter you can specify the name of an image that will
be painted over the applet. The best options are transparent GIF images.
NOTE: Animated GIF images are supported, but will be displayed as animated
only on latest browsers (Netscape 4 and Explorer 4 or newer).
With "overimgX" and "overimgY" you can center the image over the applet area.

The size of the applet is determined by width and height tags. Changing the
width and height of the applet will make the visible area of the fractal
larger. The fractal is always automatically placed in the middleof the
applet's visible area.

The "dimensions" parameter controls how many iterations are performed to
generate the fractal.

The "branches" param controls how many 'branches' are made from the starting
point. It is multiplied by 2 for each iteration.

NOTE: The formula used to calculate the fractal tree is based on the
concept of: 2^dimensions * 2 * branches.
Therefore, the number of dimensions and branches of complex
fractals may affect memory usage and computer speed.
Approximately 8 dimensions (iterations) and about 1-5 branches give the
optimum results.

The "morph_speed" param controls the speed the applet tree morphs through
different shapes.

The "rot_speed" param controls the speed of the rotation within each branch
of the fractal tree.

The "rot_speed2" param controls the speed of the rotation within the whole
fractal tree.

The "length" param control the length of the starting line of the fractal.

The "decline" param controls the decline of the length of lines drawn for
each iteration. This parameter can be an increase as well, if you make the
value more than 1. For example 0.75 gives a 25% decrease of the length for
each iteration. 1.25 gives a 25% increase of the length for each iteration.

You can choose the pen size up to size 3 with the "pensize" parameter. Or,
set the "progress" parameter to "YES" to enable the progressive pen size
increase, controlled with the "progrstep" parameter. You can also invert the
progression setting "progrinverse" parameter to "YES".

To increase speed and have a different effect, set the "iterskip" parameter
to "YES".

You can change the colors for best results on your web page. The RGB
values are same as in HTML tags, but in decimal values. Use backR,backG,backB
to change background color.

If you want to display an image in the background, place it's name in the
place of "NO" at backimage parameter (for example "back.jpg").
The only requirement is that the background image must be same size as the
applet to completely cover it.

You can choose the first and last color of a gradient
that will be spread over all the fractals: ifsR1,ifsG1,ifsB1 for first
color, ifsR2,ifsG2,ifsB2 for last color of gradient.
Examples: to make ALL the fractals white, place 255 as value for all the
ifsR1,ifsG1,ifsB1 and ifsR2,ifsG2,ifsB2.
To make fractals colored from black to white (all the intermediate grays),
place a value of 255 for ifsR1,ifsG1,ifsB1 and a value of 0 for second
color: ifsR2,ifsG2,ifsB2.

You can also make rainbows (from red to blue, etc.).

Finally, "overtext" determines if fractals can overwrite scrolltext.