Initially I understood an .oxt extension would be released with OpenOffice.org 2.4.
After the OpenOffice.org 2.4 release, I tried to build the extension myself from the source. I did, but it wouldn't install in OpenOffice.org. I asked, and OpenOffice.org Extension Grand Ninja Stephan Bergmann explained it can't be done because of binary linking problems. Then, I asked Impress Grand Ninja Thorsten Behren who told me it is in fact possible to build it using a special build environment (which I did not use).
In conclusion, where is it? It's not available. When is it coming? Unknown.
Nevertheless, there are several ways right now to use the OpenGL transitions, though none are compatible with the vanilla OpenOffice.org.
- Install OxygenOffice 2.4 (currently in beta)
- Ubuntu and Debian users: install the package openoffice.org-ogltrans
- OpenSUSE users: install package OpenOffice_org version 2.4 or newer with the file OGLTrans.uno.so
- Mandriva users: install the package openoffice.org-core version 2.4 or newer with the file OGLTrans.uno.so
- Install my old, experimental build which has the feature built in (not an extension) via HTTP or via BitTorrent
- Search for OGLTrans.uno.so on rpmfind.net or pbone.net and install the appropriate packages for your Linux distribution
- Windows users: right now this feature is Linux only
Thank you to Shane M. Mathews, Thorsten Behrens, and Radek Doulik for engineering the 3D OpenGL transitions for Impress. Thank you to them and Stephan Bergmann for answering my questions, and thank you to Google for funding the feature under the Summer of Code 2007.