Hi Frédéric,
The below is quite a long message, so I'll pick on items that I can
shed light on straight away.
First problems with archive integration and .net and your custom
plugin. I haven't done too much work on .osga and .net, but have got
it working in the past, but I can't recall the specifics, its too long
ago. Both the .net and the .osga using custom streambuf
implementation and modification of compostite filenames so there
certainly plenty of room for confusion - its complicated so you'll
need to step through with a debugging to understand what's happening.
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.
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]
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