Galaxy - Copyright (C) by F. Ciucci & A. Fasce 1998


This applet can generate and animate a realtime "galaxy" effect.
This applet is fully parametrized, so you can generate all kinds of
galaxies.

The following 3 ".class" files must be uploaded: galaxy.class, Lware.class
and anfy.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="galaxy.class" width=320 height=200>  ; Name, Width, Height
<param name=credits value="Applet by Andrea Fasce (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="Galaxy applet">  ; Statusbar message
<param name=particles value="5">           ; Particles mode (0..7)
<param name=random value="0">              ; Random effect ("0"=no, "1"=yes)
<param name=script value="1">              ; Script number (0 .. 11)
<param name=gpalette value="0">            ; Palette (0 .. 5)
<param name=persist value="6">             ; Persistence (0 .. 128)
<param name=dinamic_persist value="0.0">   ; Dynamic pers. (0.0 .. 126.0)
<param name=dinamic_min value="4">         ; Min. persistence (1 .. 127)
<param name=dinamic_max value="16">        ; Max. persistence (1 .. 127)
<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 de-allocation delay
<param name=priority value="3">            ; Task priority (1..10)
<param name=fixnetscape value="NO">        ; Fix Netscape 3.0 bug ("YES","NO")
<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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The following instructions detail how to change parameters:

Attempting to change 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 the "width" and "height" tags.

With "particles" paramete you choose the particle mode, values from 0 to 7.

With "random" parameter set to "1" a random effect will be displayed, instead
setting it to "0", will be displayed the effect selected by the "script"
parameter (0 .. 11):

 0 - Circular Galaxy
 1 - Sphere -> Ring
 2 - Tubular Galaxy
 3 - Spiral Galaxy
 4 - Rotating System
 5 - Into Sphere
 6 - Supernova
 7 - Sphere -> Tubular
 8 - Wave -> Atom
 9 - Cone -> Wave
 10 - All effects one color
 11 - All effects all colors


With "gpalette" parameter (0 .. 5) you choose the colours of effect:

 0 = white
 2 = red->black
 1 = blue
 3 = red->violet
 4 = green
 5 = red->white

You can enable the light persistence, setting "persist" to a value higher
than 0. The max is 128, but the best results are arond 20.

You can set a persistence variation too, placing a value higher than 0.0 in
the "dinamic_persist" parameter. It accepts float values: 0.5 , 1.3 etc.
This value will be a "speed" of transition between the min and max persistence
set with "dinamic_min" and "dinamic_max" parameters.
Offcourse, min must be smaller than max!