Re: [osg-users] OSG Serialization - changes on custom Classes
Interesting. The mechanism is nice and fits it. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=49672#49672 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG Serialization - changes on custom Classes
Hi Peter, I've just submitted a patch which adds user version to the serializers. Could you please have a look at it in the osg-submissions archive and test if it could work for your cases? Thank you, Wang Rui 2012/8/21 Peter Bako > Hi mr. Rui Wang. > > Thank you for your help. > It would be nice if we can set an auxiliary version number manually, when > writing or reading files. > This mechanism would be perfect! > Can I assume that this modification will be implemented in the next month? > Or what do you suggest to me to do? It is not time critical in the next > month, but then it will be :-). > > > This is a little off-topic, but why is the osg web page inaccessible? > Trac detected an internal error: > OperationalError: database is locked > > > > Thank you! > > Cheers, > Peter > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=49384#49384 > > > > > > ___ > 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
Re: [osg-users] OSG Serialization - changes on custom Classes
Hi Peter and Robert, I'm glad to consider a backward-compatible way to add custom versioning mechanism to current plugin. I would submit it as soon as possible so Peter and everyone else could test it and see if it suitable for pratical uses. Wang Rui 2012/8/23 Robert Osfield > Hi Peter and Rui, > > On 21 August 2012 12:59, Peter Bako wrote: > > It would be nice if we can set an auxiliary version number manually, > when writing or reading files. > > This mechanism would be perfect! > > Can I assume that this modification will be implemented in the next > month? > > Or what do you suggest to me to do? It is not time critical in the next > month, but then it will be :-). > > As I have plenty of other work on my plate I'll defer to Rui to come > up with a suggested solution, or yourself if you fancy rolling up your > sleeves up. I do wonder if a user definable format key/string might > be appropriate - I guess the schema and present version number take us > a bit down this route, but perhaps one needs a list of schema or > versions so that multiple layers can be added on for 3rd party libs > can add their own feature set and rev it independently from the OSG > versioning. > > > > This is a little off-topic, but why is the osg web page inaccessible? > > Trac detected an internal error: > > OperationalError: database is locked > > The openscenegraph.org server has been rather beset by problems so we > are working on a replacement. Try the new openscenegraph.com when the > .org version is down. > > Robert. > ___ > 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
Re: [osg-users] OSG Serialization - changes on custom Classes
Hi Peter and Rui, On 21 August 2012 12:59, Peter Bako wrote: > It would be nice if we can set an auxiliary version number manually, when > writing or reading files. > This mechanism would be perfect! > Can I assume that this modification will be implemented in the next month? > Or what do you suggest to me to do? It is not time critical in the next > month, but then it will be :-). As I have plenty of other work on my plate I'll defer to Rui to come up with a suggested solution, or yourself if you fancy rolling up your sleeves up. I do wonder if a user definable format key/string might be appropriate - I guess the schema and present version number take us a bit down this route, but perhaps one needs a list of schema or versions so that multiple layers can be added on for 3rd party libs can add their own feature set and rev it independently from the OSG versioning. > This is a little off-topic, but why is the osg web page inaccessible? > Trac detected an internal error: > OperationalError: database is locked The openscenegraph.org server has been rather beset by problems so we are working on a replacement. Try the new openscenegraph.com when the .org version is down. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG Serialization - changes on custom Classes
Hi mr. Rui Wang. Thank you for your help. It would be nice if we can set an auxiliary version number manually, when writing or reading files. This mechanism would be perfect! Can I assume that this modification will be implemented in the next month? Or what do you suggest to me to do? It is not time critical in the next month, but then it will be :-). This is a little off-topic, but why is the osg web page inaccessible? Trac detected an internal error: OperationalError: database is locked Thank you! Cheers, Peter -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=49384#49384 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG Serialization - changes on custom Classes
Hi Peter, Oh there is another feature of the osgb plugin that I almost forget. :-) It supports serializer control using the version number. You may read about it at this page: http://lists.openscenegraph.org/pipermail/osg-submissions-openscenegraph.org/2010-November/007273.html Unfortunately the version number mentioned above will automatically be set to OPENSCENEGRAPH_SOVERSION, so unless the OSG soversion changed, all your modifications to your own serializers will not be separated. I guess we may have to modify the plugin source code slightly to add an option to allow setting the version number (or just an auxiliary version number) manually when writing/reading files to achieve your goal. Regards, Wang Rui 2012/8/21 Peter Bako > Hi mr. Wang Rui. > > Thank you for your response. I am actually an owner of your OSG book :-). > I tried your suggestion, it works, but the limitation is that we can have > only 2 versions of osgb files (old format - with the schema) and the new > (actual format). > Does this mean that there is no way to make more versions readable for my > application? For example, could we generate schema for every version and > try to load the file with the schema from the oldest version, if not > succeed, then with the newer version, then with newer and so on until the > load is successful (loaded component is not NULL). > I don't see under the hood of binary serialization, I couldn't find the > correct file. > > I need this functionality because I know, that my application will grow > after release and maybe we will need to change the serialization after the > release to the customers. > Do you have any other idea to make this possible? > > Thank you once more! > > Cheers, > Peter > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=49376#49376 > > > > > > ___ > 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
Re: [osg-users] OSG Serialization - changes on custom Classes
Hi mr. Wang Rui. Thank you for your response. I am actually an owner of your OSG book :-). I tried your suggestion, it works, but the limitation is that we can have only 2 versions of osgb files (old format - with the schema) and the new (actual format). Does this mean that there is no way to make more versions readable for my application? For example, could we generate schema for every version and try to load the file with the schema from the oldest version, if not succeed, then with the newer version, then with newer and so on until the load is successful (loaded component is not NULL). I don't see under the hood of binary serialization, I couldn't find the correct file. I need this functionality because I know, that my application will grow after release and maybe we will need to change the serialization after the release to the customers. Do you have any other idea to make this possible? Thank you once more! Cheers, Peter -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=49376#49376 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG Serialization - changes on custom Classes
Hi Peter,
Yes, there is a schema mechanism in the osg plugin which could record a
serializer name list (a schema) at the beginning of every .osgb file and
the reader will automatically check and read the schema to decide each
serializer order and existence.
For your situation, the best way I think is to generate a schema file first
using the option:
writeNodeFile(*node, "file.osgb", new
osgDB::Options("SchemaFile=old_version_format.txt"));
This could be done only once when you save a .osgb file. Note that the
schema file should be created with the old version of plugin.
And then you may read all old .osgb files with the new version of plugin,
using the same option:
readNodeFile("file.osgb", new
osgDB::Options("SchemaFile=old_version_format.txt"));
And the schema will be used to load old version files correctly.
Wang Rui
2012/8/20 Peter Bako
> Hello guys,
>
> I am using OSG serialization on my custom classes derived from
> osg::MatrixTransform and osg::Geometry.
> I already use this serialization for some time, so I have many .osgb files
> exported on my disk, but now, I want to add some new properties to my Class
> and serialize them (new ADD_BOOL_SERIALIZER). The problem is, that I cannot
> load the old .osgb files anymore. It works only on .osgt files.
> Is there any way, how to extend my serialization, while the old files will
> be still loadable?
>
> Thank you!
>
> Cheers,
> Peter
>
> --
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=49338#49338
>
>
>
>
>
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>
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[osg-users] OSG Serialization - changes on custom Classes
Hello guys, I am using OSG serialization on my custom classes derived from osg::MatrixTransform and osg::Geometry. I already use this serialization for some time, so I have many .osgb files exported on my disk, but now, I want to add some new properties to my Class and serialize them (new ADD_BOOL_SERIALIZER). The problem is, that I cannot load the old .osgb files anymore. It works only on .osgt files. Is there any way, how to extend my serialization, while the old files will be still loadable? Thank you! Cheers, Peter -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=49338#49338 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
