loads all the available nodes in the zip archive and returns an osg::Group containing all the nodes if there is more
than one, or just returns the node if there is just one. Also implemented this functionality for ReaderWriterZip::readImage().
Here is a quick list of the modified files:
Archive - getDirectoryContents() no longer pure virtual
Archive.cpp - default getDirectoryContents() implementation
unzip.cpp - modified to fix a bug where the same file will not load twice in a row
ZipArchive.h / ZipArchive.cpp - extends osgDB::Archive and provides support for random access loading within a .zip file
ReaderWriterZip.cpp - modified to use the ZipArchive class"
I attach a modified ReaderWriterZIP.cpp (based on version 2.9.5 revision 10374).
This includes a little bit of code tidying, but the only functional change is a test of the return value of OpenZip and the addition of a call to CloseZip."
1. I've implemented an option controlled route by which users can still access the old method of extracting the zip content to the local filesystem. This is in response to Ulrich's comments about zip files encorporating files other than those that OSG knows about, but which an application may require.
To access this the user makes the following call on their options object that they pass to the reader. Without it, the plugin will extract by default to memory.
local_opt->setPluginStrData("zipextract","filesystem");
2. The second change is that I've moved the declaration of one of the variables to within the numitems loop so that if loading of a specific file within the zip fails, subsequent files still load correctly. This was the issue that Ulrich raised."
completed the new registration of the plugin-readerwriters
("REGISTER_OSGPLUGIN") according to your osgstaticviewer-example (see
attachment, based on today's svn)."
instead of osgDB::Registry where it original lay. This has been done to allow
fileName strings to be encode data rather than just file names, such as one
requires when using PagedLOD along with plugins for doing dynamic tesselation.
storage of the path lists into osgDB::Registry, and changed the data
structor from a char* to a std::deque. Changed a names of couple of the
convinience functions in osgDB/FileUtils to better reflect the two
public FilePathList's - DataFilePathList and the LibraryFilePathList.
Added support into the osgDB::Registry::readNode/Image/Object methods
for pushing and popping the path of the current file being loaded.
for settings options in osgDB::Registry, and added the paramter to all of the
reaader/writer plugins. The Options structure by default has an string attached
for packing basic options, however, it also can be subclassed to encapsulate
any users defined option data. In the later case both the client code *and*
the plugin need to be aware of subclass, the plugin will need to use
dynamic_cast<> to assertain its type.
