So, that brings me back to where I started:
I have looked through the documentation "Deploying Java Extensions" and "Optional
Package Versioning", and it seems rather theoretical. That is, I understand that the
parameters in the manifest need to be supplied with values, but I don't know what
specific values to use for Java3D.
for instance: java3d-Implementation-URL:
As far as I can tell, Sun doesn't provide a signed jar file for Java3D that I can put
here.
However, when I downloaded J3D 1.2.1_04, this was part of the documentation:
"Sun Microsystems allows vendors to distribute the Java 3D(TM) Runtime
environment with their Java programs, provided they follow the terms
of the Java 3D(TM) Binary Code License and Supplemental License Terms
agreement."
Doesn't that mean we can put Java3D on our server, and point to it from the manifest?
If so, I suppose I would need to get it signed. That seems strange to get someone
else's jar files signed - is it even possible?
Your example is helpful, though. It's becoming a little more clear to me. I'll await
your example that you mentioned in an earlier email ("RE: auto-installing Java3D").
Andrea Boright
-----Original Message-----
From: Justin Couch [mailto:[EMAIL PROTECTED]]
Sent: Thursday, March 14, 2002 2:40 PM
To: [EMAIL PROTECTED]
Subject: Re: [JAVA3D] j3D detection
Andrea Boright wrote:
> I will also be checking if the user has JRE1.4 (via the CODEBASE parameter in the
>OBJECT tag). I want to check for JRE1.4 and J3d at the same time. That is, if the
>user doesn't have JRE1.4 and doesn't have J3D, I don't want them to have to download
>just JRE1.4, load the applet again, only to find a message that they don't have J3D,
>and then have to go download that.
>
> Does anyone know a way to detect both at the same time?
That is up to the specification you put into the manifest file for your
applet's JAR. Have a read around the spec docs with the JDK for details
on this, but it's relatively simple to do. As an example, here is a
manifest entry that we use in Xj3D for the Java3d rendering component:
Class-Path: xj3d-norender.jar xj3d-core.jar xj3d-parser.jar xj3d-sav.jar
Class-Path: xj3d-net.jar uri.jar j3d-org.jar
Extension-List: java3d
java3d-Extension-Name: javax.media.j3d
java3d-Specification-Version: 1.2
java3d-Implementation-Version: 1.2.1.04
java3d-Implementation-Vendor-Id: com.sun
java3d-Implementation-Title: Java3D Core Runtime Environment
java3d-Implementation-URL:
http://java.sun.com/products/autodl/java3d/prefer_ogl/java3d-$(os.name)$.jar
Extension-Name: xj3d
Specification-Vendor: Web3d Consortium
Specification-Version: 3.0
Implementation-Vendor-Id: com.yumetech
Implementation-Vendor: Yumetech, Inc
Implementation-Version: 2.0
--
Justin Couch http://www.vlc.com.au/~justin/
Java Architect & Bit Twiddler http://www.yumetech.com/
Author, Java 3D FAQ Maintainer http://www.j3d.org/
-------------------------------------------------------------------
"Humanism is dead. Animals think, feel; so do machines now.
Neither man nor woman is the measure of all things. Every organism
processes data according to its domain, its environment; you, with
all your brains, would be useless in a mouse's universe..."
- Greg Bear, Slant
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