Problems/question/tips: Who developed this software?
This java applet is the result of a collaboration between LeRoy
Dorman and Doug Gehringer at Sun. I am much indebted to them for making
the software available and particularly to LeRoy for talking me through
its application for these pages.
Problem: The applet doesn't load.
If the applet loads you should see a black rectangle with slider controls
at the bottom and a 3D blue and red image in the middle with a map of Iceland
on the top surface. Note that it may take a minute to load. If you don't,
then follow these instructions:
Solution:
You may need to download some plug-ins in order view and manipulate
the 3D data volume, here is what is necessary:
(1) You must have the capability to run Java1.2 (AKA Java2). Java2 is
bundled with Netscape6, if you do not have Netscape6 you need to download
the Java Runtime Environment (JRE) ...version 1.3.1 is fine. (The Software
Developers Kit (SDK) is the alternative and is unnecessary.) JRE allows
you to execute Java2 bytecode within your browser and is available from
the Java 2 site.
Once you have selected the download for your operating system you must
install it ...see the installation
help on the Sun Java site. If you are using a Windows PC: simply save
the downloaded file somewhere then double-click on it and it will install
itself. Restart your machine and you are good to go. To verify that your
Java2 installation works go to a Java2 demo page ...simply search for "java2
demo" with your favorite search engine.
At the time of writing the Java2 software was available for the following
platforms: Solaris for Sparc and Intel hardware (Solaris 8 requires fewer
patches), Windows 95/98/NT, Linux and SGI IRIX.
(2) You must install Java3D, available for Solaris (Sparc only), Windows,
Linux and IRIX. Currently this does not come bundled with any browser.
Get it from Java3D.
There is no need to download the latest beta version and you only need
the "Runtime for JRE" version rather than the SDK, I used the Java 3D 1.2.1
release. For Windows PC users you have a choice between the DirectX and
OpenGL versions, I used the DirectX version for which you will need to
download DirectX! First download Java3D, install it by clicking on the
download file (it should fine your Java2 installation and add to it) and
restart your machine. Then download DirectX (or OpenGL), click to install
and restart your machine again. You can get DirectX from the
DirectX
site. You may find the Java3D
installation notes useful. For even more detailed instructions, see
the Java3D FAQ. To verify
that your Java3D installation was successful, try to view one of our models
e.g.
iceMAN-HP
or you can try Dan
Selman's BenchJ3d.
Problem: Get a Security Warning when I try to view pages with the
3D view.
The window may be titled "Java Plug-in Security Warning" and states
"Unable to verify certificate - code will be treated as unsigned"
Solution:
The security warning simply states that the source of this applet is
not known to your browser (i.e. Netscape or Explorer/Microsoft). This is
because this web site is not known to them ...clearly they are missing
out! If you do not choose "OK" the applet is not executed. When you click
"OK" the applet runs but is still only allowed limited access to your computer
i.e. it cannot access your disks, but only use your cpu to run the applet
in memory. If you do not choose "OK" the applet will not run.
Manipulating the 3D image
Initially the viewer will display the image using preset parameters.
Dragging the mouse across the screen with the left button depressed will
rotate the image. The sliders at the bottom control the portion of the
velocity field shown as transparent. The upper slider controls how much
of the (blue) anomalously high velocities are visible and the lower slider
controls how much of the (red) anomalously low velocities are visible.
The velocities in between are transparent allowing you to see through the
volume.
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