Anfy IFS-fractals - Copyright (C) by Fabio Ciucci 1997-99


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

This applet is based on the original code by Martin Zettergren, and is used
under a licence.

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NECESSARY FILES.

Apart from a background and/or a foreground images, the following 2 
".class" files must be uploaded: 

AnFract.class
Lware.class

Plus, AnFract.jar for speedy loading on recent browsers.

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EXAPLE.

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


<applet archive="AnFract.jar" code=AnFract.class width="200" height="200">
<param name="credits" value="Applet by Fabio Ciucci (www.anfyteam.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 (img name or "NO")
<param name="backR" value="0">           ; Background colour (red component)
<param name="backG" value="0">           ; Background colour (green component)
<param name="backB" value="0">           ; Background colour (blue component)
<param name="ifsR1" value="255">         ; Fractal colour 1 (red component)
<param name="ifsG1" value="255">         ; Fractal colour 1 (green component)
<param name="ifsB1" value="180">         ; Fractal colour 1 (blue component)
<param name="ifsR2" value="10">          ; Fractal colour 2 (red component)
<param name="ifsG2" value="50">          ; Fractal colour 2 (green component)
<param name="ifsB2" value="255">         ; Fractal colour 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

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INSTRUCTIONS.

The following instrcutions describe 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 mouse-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 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" paramer 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 colour 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 colour.

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 colour, ifsR2,ifsG2,ifsB2
 for last colour 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 coloured 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.