Re: [osg-users] VertexAttribArrayList serialization
I think the problem with the generated file is that the vertex attributes begin at 6 and the attributes 0 to 5 are null pointers and are not written. Then when reading the reader expects 8 arrays but there are only 2 written so it messes up reading them. I also noticed that, unlike in the osg format there is no way to tell to what attribute number to bind an array. Cheers, Pjotr -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=58952#58952 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] VertexAttribArrayList serialization
Hi Pjotr, I think the problem with the generated file is that the vertex attributes begin at 6 and the attributes 0 to 5 are null pointers and are not written. Then when reading the reader expects 8 arrays but there are only 2 written so it messes up reading them. I also noticed that, unlike in the osg format there is no way to tell to what attribute number to bind an array. Apart from the binding, it was working before. There seem to be changes in the serialization. Unfortunately one cannot use arbitrary numbers here, since drivers do a default mapping between default vertex attributes and the attribute slots in the shader program. cheers Sebastian Cheers, Pjotr -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=58952#58952 ___ 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] VertexAttribArrayList serialization
I'm not familiar with the new osg(t/b) writers (we still use osg and ive here but are also considering a switch) but looking at the commit log there was a change in the revision 14099 that added a new way to serialize arrays to support the lua plugin which seems to change the layout also. Cheers, Pjotr -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=58957#58957 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] VertexAttribArrayList serialization
HI Sebastian, On 15 April 2014 10:59, Sebastian Messerschmidt sebastian.messerschm...@gmx.de wrote: I'm a bit lost with the issue. Isn't the osgb-format supposed to be stable? The format isn't stable, as new features get added or changed in the OSG. However, it is versioned and should in theory allow older files to be read with new versions of the OSG. Can you at least point me to the revision where this might have changed? Summarized: It seems files written by the trunk-revision 14033 cannot be read by older versions (osg111, 3.3.1). Also files containing vertex attribute arrays cannot be read by the revision it was written with. The format is forwards compatible rather than backwards compatible. While I do try and avoid changes to existing parts of format sometimes it's not possible to implement new features or refactor old features without implementing changes that break forwards compatibility. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] VertexAttribArrayList serialization
Hi Robert HI Sebastian, On 15 April 2014 10:59, Sebastian Messerschmidt sebastian.messerschm...@gmx.de wrote: I'm a bit lost with the issue. Isn't the osgb-format supposed to be stable? The format isn't stable, as new features get added or changed in the OSG. However, it is versioned and should in theory allow older files to be read with new versions of the OSG. Can you at least point me to the revision where this might have changed? Summarized: It seems files written by the trunk-revision 14033 cannot be read by older versions (osg111, 3.3.1). Also files containing vertex attribute arrays cannot be read by the revision it was written with. The format is forwards compatible rather than backwards compatible. While I do try and avoid changes to existing parts of format sometimes it's not possible to implement new features or refactor old features without implementing changes that break forwards compatibility. Okay, I'll keep that in mind. But in the specific case, the serializer cannot read what it wrote. So this might be worth investigating. cheers Sebastian 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] VertexAttribArrayList serialization
Hi Robert, I'm a bit lost with the issue. Isn't the osgb-format supposed to be stable? Can you at least point me to the revision where this might have changed? Summarized: It seems files written by the trunk-revision 14033 cannot be read by older versions (osg111, 3.3.1). Also files containing vertex attribute arrays cannot be read by the revision it was written with. cheers Sebastian ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] VertexAttribArrayList serialization
Hi, I've just found some curious bug in the osg(t/b) serializers. Currently I'm using a more or less up2date trunk. When I add vertex-attributes for tangent space to a node and write out the file, it is no longer readable by osg. I'll try to provide a minimal example demonstrating the issue. Have there been any changes recently which could explain this? Checking the log I didn't catch anything suspicious. cheers Sebastian ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] VertexAttribArrayList serialization
Also it seems that older version of osg (osg111) cannot read these files even without vertex attributes. Has there been a breaking change in the serialization format? cheers Sebastian Hi, I've just found some curious bug in the osg(t/b) serializers. Currently I'm using a more or less up2date trunk. When I add vertex-attributes for tangent space to a node and write out the file, it is no longer readable by osg. I'll try to provide a minimal example demonstrating the issue. Have there been any changes recently which could explain this? Checking the log I didn't catch anything suspicious. cheers Sebastian ___ 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
