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<meta name="Description" content="A Java applet that creates mathematically accurate spirograph drawings; savable as images.">
<title>Amazing Spiro Applet</title>
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<h1>Spiro Applet version 0.98</h1>
<ul>
<p>Click on one of the buttons below to pop up a Spiro applet drawing canvas.
When the design canvas pops up, try picking one of the presets and then
clicking on the button "Draw this Design!". For more help, click on the
"Help" button, or view the help
<a href="http://users.erols.com/ziring/spir...
<a href="http://www.jars.com/"><img src="java_registered.gif" width=103 height=58 border=0 vspace=2 align=right></a>
<p>
<center>
<applet code="SpiroApplet" archive="spiro.jar" height=160 width=190 border=2>
<param name="help" value="http://www.erols.com/ziring/spiro...
<param name="baseURL" value="http://cgibin.erols.com/ziring/cg...
Sorry, Java is not working. There are three possible causes for
this:
<ul>
<li>Your browser does not support Java (e.g. WebTV, older AOL, AtomNet, etc.)
or it does not support Java 1.1.
<br>Get a Java-capable browser from
<a href="http://www.netscape.com/download">... or
<a href="http://www.microsoft.com/windows/i...
<li>Your browser has Java turned off.<br>Turn on Java using Edit|Preferences|Advanced in Netscape, or Microsoft Internet Options/Security tab.
<li>Your firewall or provider is filtering out Java.<br>
Sorry, not much you can do about this.
</ul>
</applet>
<p> </p>
<small>[Note: the "Huge" canvas size will be too big for most computers, and does not seem to work in Netscape.]</small>
<p>
</center>
</ul>
<p>
<hr width="45%">
<p>
<h3>Some Sample Images</h3>
<ul>
Click on one of the thumbnails below to see some examples of
what the Spiro applet can do.
</ul>
<center>
<a href="http://users.erols.com/ziring/spir... src="http://users.erols.com/ziring/spiro... width=64 height=64 border=2 vspace=5 hspace=20></a>
<a href="http://users.erols.com/ziring/spir... src="http://users.erols.com/ziring/spiro... width=64 height=64 border=2 vspace=5 hspace=20></a>
<a href="http://users.erols.com/ziring/spir... src="http://users.erols.com/ziring/spiro... width=64 height=64 border=2 vspace=5 hspace=20></a>
<a href="http://users.erols.com/ziring/spir... src="http://users.erols.com/ziring/spiro... width=64 height=64 border=2 vspace=5 hspace=20></a>
</center>
<p>
<h3>Background Information</h3>
<ul>
The Spiro applet is an attempt to offer a fairly serious
tool for creating a certain kind of graphic, while keeping
things reasonably simple and portable.
Written for Java 1.1, the Spiro applet has been tested and
found to work on the following platforms:
<p>
<ul>
<li>Netscape Communicator 4.06, Windows 98
<li>MS Internet Explorer 4.01, Windows 98
<li>Netscape Communicator 4.73, Windows 98
<li>Netscape Communicator 4.72, Windows NT
<li>MS Internet Explorer 5.0, Windows NT
<li>MS Internet Explorer 5.0, MacOS
<li>Netscape Communicator 4.72, RedHat Linux 6.1
<li>Netscape Communicator 4.72, Solaris 8
</ul>
<p>
The applet will not work in versions of Netscape older than 4.02,
nor will it work in versions of MSIE older than 4.0. Also,
the applet does not seem to work in many versions of Netscape
on the Macintosh (not sure why yet).
<p>
Unlike most art-creation applets on the web, the Spiro applet
allows you to save your work! Normally, saving your work locally from
an applet is difficult, because Java security restrictions prevent
applets from creating local files. The Spiro applet sidesteps
Java's security restrictions by means of
a small server-side CGI system that 'reflects' the applet-created
image back to the web browser.
</ul>
<p>
<h3>Running Spiro as an Application</h3>
<ul>
<p>
For folks that would like to play with the Spiro applet on their
own computer, Spiro is also available as a Java application.
To run Spiro as an application, you'll need the Sun JDK or JRE,
version 1.1.7 or later (1.2.1 or later recommended). The application
version of Spiro allows you to save drawing to your local disk as
standard Targa (.tga) image files. You can download the Java JAR
file for Spiro, and obtain the Sun Java Runtime if you need it, from
the links below:
<p>
<ul>
<li><a href="spiro.jar">Spiro 0.98 application: spiro.jar</a></li>
<li><a href="http://java.sun.com/j2se/">Java 2 Platform downloads</a></li>
</ul>
<p>
Once you have the Java Runtime installed, you should be able to run Spiro
by typing the command <tt>java -jar spiro.jar</tt>. (Under MacOS, of course,
you can't type commands. Follow the MacOS help for running Java applications.)
<p>
The Spiro application is available free of charge, and unencumbered by
any warranty or claims of suitability for any particular purpose. Use
at your own risk. Source code for Spiro is available on
request, email to <i>ziring@home.com</i>.
<p> </p>
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This page written by <A HREF="mailto:ziring@home.com">
Neal Ziring</A>, last modified 6/5/00.
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