>>Hi Frédéric,
>>The below is quite a long message, so I'll pick on items that I can
>>shed light on straight away.
ok, sorry il will try to be more concise
>>Finally the http:// is a special case that osgDB::Registry looks for,
>>and automatically load the .net plugin to handle such files. Since
>>you're working on your own custom format this hardwaring won't be
>>possible, but perhaps osgDB::Rigistry::ReadFileCallback can be used to
>>catch your special filenames and then manage things.
I have tried this solution :
I have defined a class Sp3dReadFileCallback : public Registry::ReadFileCallback.
For each of the readXXX function i do something like that :
virtual ReaderWriter::ReadResult readNode(const std::string& filename, const
ReaderWriter::Options* options)
{
// Is this is a sp3d://xxxx url, use the Sp3dReaderWriter directly
//
ReaderWriter *ptSp3dReader =
Registry::instance()->getReaderWriterForExtension("sp3d") ;
if( ptSp3dReader && isSp3dServerUrl( filename ) )
return ptSp3dReader->readNode( filename, options ) ;
// else if a previously defined ReadFileCallback wad defined, use it.
// m_ptPreviousReadFileCallback was initialized in constructor with
getReadFileCallback...
//
if( m_ptPreviousReadFileCallback )
// not called in my case since m_ptPreviousReadFileCallback is NULL
return m_ptPreviousReadFileCallback->readNode( filename, options ) ;
else
// use default registry handling
return Registry::instance()->readNodeImplementation( filename,
options ) ;
}
This works for my protocol but this fails for all local loadings !!!
I am probably missing something. Particulary I am not sure about what to do
if the filename is not a sp3d url...
Any ideas ?
oooups, this was not really a short post...
>>Robert.
On 6/13/06, Frédéric Trastour <[EMAIL PROTECTED]> wrote:
> Hello all,
>
> I am working on a driver very similar to the '.net' one. This driver just
> uses a different
> network protocol (not the http/get of the net driver but a proprietary one).
>
> I have used the code of the net driver as a starting point for my driver.
> I have just removed the cache mecanism ( later, i will use the cache managed
> by my application )
> and I have changed the download stuff in order to use my protocol.
>
> I can successfully use my driver with osgviewer :
>
> ./osgviewerd.exe sp3d://localhost:2468/3d/747.ive.sp3d
>
> The problem I have concerns osg archive.
> This works locally :
>
> ./osgviewerd.exe ./archive.osga load the
> archive and display the first file
> ./osgviewerd.exe ./archive.osga/747.ive load the archive
> and display the file 747.ive
> ./osgviewerd.exe ./archive.osga/capitole_p2.ive load the archive and
> display the file capitole_p2.ive
>
> but this fails with both my driver and the .net one.
>
> I have seen that in net driver do some stuff about archive processing :
>
> virtual ReadResult openArchive(const string& fileName,ArchiveStatus
> status, unsigned int , const Options*
options)
> const {
> osg::notify(osg::NOTICE) << "osgPlugin::openArchive " <<
> fileName << endl;
> if (status!=READ)
> return ReadResult(ReadResult::FILE_NOT_HANDLED);
> else
> return readFile(ARCHIVE,fileName,options);
> }
>
> ReadResult readFile(ObjectType objectType, osgDB::ReaderWriter* rw,
> std::istream& fin, const Options *options)
> const
> {
> switch(objectType)
> {
> case(OBJECT): return rw->readObject(fin,options);
> case(ARCHIVE): return rw->openArchive(fin,options);
> case(IMAGE): return rw->readImage(fin,options);
> case(HEIGHTFIELD): return rw->readHeightField(fin,options);
> case(NODE): return rw->readNode(fin,options);
> default: break;
> }
> return ReadResult::FILE_NOT_HANDLED;
> }
>
> ...
>
> if (objectType==ARCHIVE && readResult.validArchive())
> {
> // attach the socket istream to the archive to keep it alive.
> osgDB::Archive* archive = readResult.getArchive();
> archive->setUserData(sio.get());
> }
>
> ...
>
> and I have replicated this in my driver. The problem is that I can't load an
> archive neither
> with the net driver nor with mine (.sp3d).
>
> ./osgviewerd.exe http://localhost/geogp/archive.osga
>
> doesn't work.
>
> Another thing I do not understand is that the net driver is loaded
> automatically with the following url :
>
> http://localhost/geogp/toto.ive (note that no .net needs to be appended).
>
> Is it possible to automatically load my driver for this type of url :
>
> sp3d://localhost/toto.ive
>
> for now I have to append the .sp3d extension.
>
> Thanks in advance for any help, I am totally new to OSG and this is a really
> large
> library. I don't know how to search first...
>
> I hope my poor english will be understood :(
>
> _________________________________________________________________
> Frédéric Trastour - SpacEyes - [EMAIL PROTECTED]
>
> _______________________________________________
> osg-users mailing list
> [email protected]
> http://openscenegraph.net/mailman/listinfo/osg-users
> http://www.openscenegraph.org/
>
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