Martin,
I sent several questions/observations to the plug-in
group. If/when I get a useful response I'll post it.
Here is a rather long-winded summary of what I have
found. (sorry for the length)
I have been able to run applets, but only by explicitly
adding the plug-in extensions jar-files to my CLASSPATH,
not a very elegant solution compared to the rather elegant
'extensions mechanism' of Jdk1.2. My impression is that
the extensions mechanism is not working. I hope I am wrong.
I am running Windoze95, jdk1.2, Netscape4.05 and Java3D
1.1.1 for OpenGL. As you have found also, I have had no
trouble converting html-files to use the plug-in 1.2. I have had
problems getting the extension mechanism to work - in this
case, getting the default classloader to look for classes in the
'ext' directory of 'Jre/1.2' of the plug-in path. In the Java3D
case I installed the four Java3D jars in
'c:\Program Files\JavaSoft\Jre\1.2\lib\ext' - this should
make them accessible by the default classloader according to
the extensions mechanism.
I tried three settings for the plug-in control panel 'advanced'
features. One was 'default' and the other was
'C:\Program Files\JavaSoft\Jre\1.2', and the third was for the
jdk JRE directory. These all resulted in 'Class
Not Found' errors - thus, the default classloader does not seem
to know to look in the extensions directory.
I found a few references to this question in the Java3D FAQ.
The main point made was changing the advanced panel in the
plug-in control panel. There was also a reference to needing to
sign jar files, but I don't think that should be needed given that
I have read that native code classes can be loaded if they are
placed in the 'ext' subdirectory of the JRE/lib of the plug-in.
In any case, as I mentioned, the panel changes didn't help me.
I found this passage in the Plug-in FAQ, but I had no luck in
realizing it:
Q: We are trying to use Java 3D with Java Plug-in, but it doesn't
work at all. Why?
A: Java 3D comes with various packages. Installing it
incorrectly may inadvertently disable Java
Plug-in or cause it to fail. Follow these general
instructions for using Java 3D and Java Plug-in:
1.Install Java Plug-in first.
2.Install Java 3D in a new directory. Do not
install it over the existing JDK/JRE.
3.In the Java Plug-in control panel, switch the JRE
to the one that came with Java 3D.
4.Download the HTML Converter 1.2 and convert the
Java 3D demo pages.
The Java 3D demos should now run within Java Plug-in.
As I said, I did this, but only got applets running by an explicit
addition of the extensions directory jar-files to my CLASSPATH,
thus, not using the elegant solution of the plug-in extensions mechanism.
I would also be interested in knowing if anyone has been successful
in using *only* the presence of the J3D jar files in the plug-in extensions
directory to run J3D applets. (ie. no explicit addition to the CLASSPATH)
Best wishes,
Mark
---------------------------------------------
Marvin Chase wrote:
> I'm using Java 2 with Java3D1.1, The Java Plug-in and The Java HTML
> Converter. My Java 2 JRE is installed to E:\Program Files\JavaSoft... I
> wrote a 3D app that I want to run in a browser. I converted the html
> display page with the Converter, but I have no success running the app.
> I've tried the Java Plug-in examples online and they work fine, but I cant
> get anything to run from my hard disk. The 2D demos that come with the kit
> don't display in my browser (IE5) either despite The Java Plug-in. I am
> only able to display them using appletviewer. Can anyone help? Thanks for
> any suggestions..
>
> ICQ: 8647690
>
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