The java3d ebuilds in the gentoo portage tree are very outdated, and didn’t even work for me anymore. So I wanted to install a newer version of java3d. This resulted in the updated ebuild you can download from here:

[download#22]

I tried the ebuild together with sun-jdk-1.6.0.13 on x86_64 gentoo linux, but it schould also work on i586.

To use it just create the directory structure

mkdir -p /usr/local/portage/dev-java/sun-java3d-bin/

and copy the new ebuild to that directory. Then run

ebuild /usr/local/portage/dev-java/sun-java3d-bin/sun-java3d-bin-1.5.2.ebuild digest

Be sure to include the following line in your /etc/make.conf:

PORTDIR_OVERLAY=”/usr/local/portage”

Then just emerge sun-java3d.

emerge /usr/local/portage/dev-java/sun-java3d-bin/sun-java3d-bin-1.5.2.ebuild

The ebuild creates some symlinks in your VM’s directory, so if you switch the browser plugin or the entire VM you have to reemerge sun-java3d-bin. To have the library ready to use you also have to add the following lines to your /etc/profile:

if [ “$CLASSPATH” = “” ] ; then
CLASSPATH=”/usr/share/sun-java3d-bin/lib/vecmath.jar:/usr/share/sun-java3d-bin/lib/j3dutils.jar:/usr/share/sun-java3d-bin/lib/j3dcore.jar”
else
CLASSPATH=”${CLASSPATH}:/usr/share/sun-java3d-bin/lib/vecmath.jar:/usr/share/sun-java3d-bin/lib/j3dutils.jar:/usr/share/sun-java3d-bin/lib/j3dcore.jar”
fi
export CLASSPATH

if [ “$LD_LIBRARY_PATH” = “” ] ; then
LD_LIBRARY_PATH=”/usr/lib/sun-java3d-bin/”
else
LD_LIBRARY_PATH=”${LD_LIBRARY_PATH}:/usr/lib/sun-java3d-bin/”
fi
export LD_LIBRARY_PATH

To have the changes in effect logout and login again.

If you want to have java3d useable in firefox you have to modify the line:

export LD_LIBRARY_PATH=”/usr/lib64/mozilla-firefox”

in your /usr/bin/firefox to:

export LD_LIBRARY_PATH=”/usr/lib64/mozilla-firefox”:$LD_LIBRARY_PATH

Otherwise you will end up getting unstatisfied link errors since the j3d library cannot be loaded.

Finally you can test if your java3d works on Testseite für Java und Java3D – VS-C. If you are working in a multiheaded environment, this java3d version may only work on the first display. So, if you experience problems just place your browser on the first head.

Have Fun

Jürgen

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Posted in 3d, gentoo, graphics, linux | 1 Comment »

I just recognized the osgocean release on the osg mailing-list. Osgocean is a library that one can use to render water effects in a very realistic way. It was used to generate the above and below water effects in the VENUS project. For more information on the osgocean project see: osgocean You can see how realistic it looks if you watch the youtube video below.

It looked very interesting, so I decided to try it out. To do so I wrote two ebuilds, one for osgocean and one for  fftss, the fast fourier transformation library it depends on. Both are available in following archive: [download#21]

Extract the archive to your portage overlay.

# mkdir /usr/local/portage/
# cd /usr/local/portage/
# unzip osgocean_overlay.zip

Be sure that PORTDIR_OVERLAY=”/usr/local/portage” is included in your /etc/make.conf, then you can emerge it:

#emerge osgocean

For this you need to have the OpenSceneGraph library installed. Detailed Instructions on how to build OpenSceneGraph on gentoo can be found on PlopByte.

Since openscenegraph is now in the main portage tree I have updated the ebuild dependencies today (31/08/2009) to either media-gfx/openscenegraph or dev-games/openscenegraph.

Updated ebuild is now available here: [download#42] Just copy it to /usr/local/portage/media-gfx/osgocean/ after extractingosgocean_overlay.zip like described before and run:

ebuild /usr/local/portage/media-gfx/osgocean/osgocean-1.0.1.ebuild digest

Best regards

Jürgen

(1 votes, average: 5.00 out of 5)

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Posted in 3d, gentoo, graphics, linux, programming, science | No Comments »

As you can read here 2.6.30 is out now. As to the whole set of changes since 2.6.29, the best place to look is probably just
http://kernelnewbies.org/Linux_2_6_30
as usual. One thing that doesn’t seem to be mentioned here is that we’re hopefully now done with the suspend/resume irq re-architecting, and have switched to a new world order. Although I suspect lots of details will still change, of course.

If we have tested the new kernel, probably with zen patch set, we will tell you

best regards xexplorer

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Posted in kernel, linux, zen-sources | No Comments »