Excellent ZipFS plugin Jason. Thank you for the help. I think that was the hardest part of the problem. I finally got around to working on this more and I have the other half of the problem mostly solved.
It looks like OSG uses zlib for all its compression/decompression. Just out of curiosity, how did you pick libzip instead? Or did you not write ZipFS? To recap, I'm trying to set an OSG_FILE_PATH such as mydirectory/data.zip and load files out of the specified archive. At first I discovered the Registry class's FindFileCallback. I thought I could just make one of those and have it search inside of zip files. However, the work that I really needed to replace happened when the default Registry::findDataFileImplementation would call osgDB::findFileInPath in FileUtils. So I decided to override findFileInPath so that would look for paths containing ".zip" and try to locate the desired file inside the zip file. That almost worked. I also had to modify ReaderWriterZipFS::readFile so that it uses OSG's directory searching. At the beginning of the function I added std::string filenameWithPath = osgDB::Registry::instance()->findDataFile(fullFileName, options, CASE_SENSITIVE); and then I use filenameWithPath instead of fullFileName where appropriate. So now I can load almost all my game resources from one .zip file instead of a directory full of files. I haven't tested performance yet, but there's no noticeable change. .osg files load with all their textures. Here's the catch: .osg files don't get loaded with their shaders. I believe this is because shaders don't use the standard OSG plugin loading paradigm. Instead they simply use Shader::loadShaderSourceFromFile(). I haven't put any thought into this last detail yet (I hope it's not too messy), but I need a programming break.... -- Terry Welsh mogumbo 'at' gmail.com www.reallyslick.com > > Message: 9 > Date: Fri, 5 Aug 2011 08:50:10 -0400 > From: Jason Beverage <[email protected]> > To: OpenSceneGraph Users <[email protected]> > Subject: Re: [osg-users] tight integration of virtual file system > Message-ID: > <camcxsmsly2m20aoa5z7tubjob1xyrqqkmnz9z9lslzmmkqu...@mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Hi Terry, > > osgEarth has a generic zip based plugin called ZipFS that is > implemented as an osgDB plugin and isn't dependent on osgEarth. We > originally developed it to support using a zip file of imagery tiles > for a cache. > > It allows you to load files like: > osgDB::readNodeFile("c:/data/models.zip/cow.osg"); > > I haven't used it for quite awhile but last I checked it was working > just fine. You can get the osgearth source code from github at > https://github.com/gwaldron/osgearth > > If anything it could be a start to what you're looking for. > > Thanks, > > Jason > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
