Re: [osg-users] Serializing / Deserializing an osg::Node to memory pointer
Hi all, An update on this problem, I've managed to solve it by the following steps [list=] [*]As I was operating in Debug mode, the IVE plugin required zlib1d.dll - so I copy/pasted zlib1.dll and renamed it to d and put this in C:\. I can confirm this works now in debug and release [*]Then I do the serialization to stream as suggested above [*]Finally, I can get a pointer to the ostringstream's string buffer and copy it to my destination file writer to complete the custom serialization [/list] / // Create an output string stream and write the node to the stream std::ostringstream outputStream; osgDB::ReaderWriter::WriteResult wr = writer-writeNode(*geode, outputStream, 0); // Get the string containing the Geode data and the length of the string std::string geodeString = outputStream.str(); int geodeLength = geodeString.length(); const char * pGeodeBytes = geodeString.c_str(); // Do work with pGeodeBytes Thanks for the stringstream code! Andrew [/b] -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=15657#15657 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Serializing / Deserializing an osg::Node to memory pointer
Hi there, I finally got around to implementing this functionality (!!) - it works great with osg as the target format, but with ive the getReaderWriteForExtension call returns null. I assume I am missing an environment variable or something and the OSG cannot find the correct plugin? For clarification, I have osgdb_ive.dll located at C:\OpenSceneGraph\Bin\osgPlugins-2.8.0 and I have the following environment variables set (under Windows Vista 32bit) OSG_FILE_PATH = C:\OpenSceneGraph\data;C:\OpenSceneGraph\data\Images;C:\OpenSceneGraph\data\fonts OSG_ROOT = C:\OpenSceneGraph OSGHOME = C:\OpenSceneGraph Path = C:\OpenSceneGraph\bin;C:\OpenSceneGraph\share\OpenSceneGraph\bin\ ... Thank you! Andrew -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=15582#15582 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Serializing / Deserializing an osg::Node to memory pointer
To clarify this problem, I have checked my environment variables and added the plugins directory to PATH, I also was missing zlib1.dll which I have copied to the bin directory. Now when I go to the command prompt and type osgconv --format ive it comes back with a ReaderWriter for the IVE format, whereas before it popped up an error that zlib was missing. However ... In my code it still fails to load the ReaderWriter for the IVE format. /// std::string plugin = osgDB::Registry::instance()-createLibraryNameForExtension(ive); osgDB::Registry::LoadStatus status = osgDB::Registry::instance()-loadLibrary(plugin); // Status comes back as Not Loaded / Is there anything I'm missing here? Thanks very much, Andrew -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=15593#15593 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Serializing / Deserializing an osg::Node to memory pointer
Hi there, This is the first time I've posted on these boards, I wonder if any of you guys can help me out? I am developing a CAD application that uses OpenSceneGraph and I need to implement custom serialization of the CAD data to/from disk. This requires saving individual nodes and their children to a custom file format along with some other data from the app. Now I notice OSG has the ability to save/load multiple file formats using the Plugins but what I'd really like to do is save/load a node to a memory pointer, so the node data is held in memory as opposed to being written to a file. This would allow me to serialize this node data inside my own custom file format. Is there any way to serialize / deserialize a node to memory using the existing plugins? If not, how could I go about implementing this? Thank you very much in advance, AndyB -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=13565#13565 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Serializing / Deserializing an osg::Node to memory pointer
... To add to the above, I just noticed osg::ReaderWriter::writeNode has an overload accepting a std::ostream I imagine this is what I'm looking for - the ability to read and write nodes to a memory stream. Does anyone have any experience this this overload and can offer comment on it? Thank you :) -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=13567#13567 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Serializing / Deserializing an osg::Node to memory pointer
Hi Andrew,
If you don't have any custom nodes then you could use the .ive format,
and use the .ive plugins support istream/ostreams.
osgDB::ReaderWriter* writer =
osgDB::Registry::instance()-getReaderWriterForExtension(ive);
if(writer)
{
std::stringstream outputStream;
osgDB::ReaderWriter::WriteResult wr =
writer-writeNode(*node,outputStream,0));
if(wr.success()) {... do your stuff to write output the
stringstream... }
}
Robert.
On Fri, Jun 5, 2009 at 10:27 AM, Andrew Thompsonandyb1...@yahoo.co.uk wrote:
Hi there,
This is the first time I've posted on these boards, I wonder if any of you
guys can help me out?
I am developing a CAD application that uses OpenSceneGraph and I need to
implement custom serialization of the CAD data to/from disk. This requires
saving individual nodes and their children to a custom file format along with
some other data from the app.
Now I notice OSG has the ability to save/load multiple file formats using the
Plugins but what I'd really like to do is save/load a node to a memory
pointer, so the node data is held in memory as opposed to being written to a
file. This would allow me to serialize this node data inside my own custom
file format.
Is there any way to serialize / deserialize a node to memory using the
existing plugins? If not, how could I go about implementing this?
Thank you very much in advance,
AndyB
--
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http://forum.openscenegraph.org/viewtopic.php?p=13565#13565
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Re: [osg-users] Serializing / Deserializing an osg::Node to memory pointer
Hi Robert, Thank you for your reply. Some quick questions for you - By custom nodes do you mean my own classes inheriting a node? If so, no I don't have these. I am creating geometry inside Geode's in code, but the structure is very simple. As for the .ive format, I'll do a bit of googling to see what I come up with. What I'm ideally looking for is the fastest method of serializing nodes to memory stream (ideally binary format as opposed to text) and (of course this is a trade-off) the smallest file size once I save these blobs of memory. The CAD application I am working on has to handle input data with literally millions of meshes. Thank you! -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=13569#13569 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Serializing / Deserializing an osg::Node to memory pointer
Hi Andy, It does sounds like .ive should foot the bill for you as your just using standard OSG classes. Robert. On Fri, Jun 5, 2009 at 12:45 PM, Andrew Thompsonandyb1...@yahoo.co.uk wrote: Hi Robert, Thank you for your reply. Some quick questions for you - By custom nodes do you mean my own classes inheriting a node? If so, no I don't have these. I am creating geometry inside Geode's in code, but the structure is very simple. As for the .ive format, I'll do a bit of googling to see what I come up with. What I'm ideally looking for is the fastest method of serializing nodes to memory stream (ideally binary format as opposed to text) and (of course this is a trade-off) the smallest file size once I save these blobs of memory. The CAD application I am working on has to handle input data with literally millions of meshes. Thank you! -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=13569#13569 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
