Re: [osg-users] VRML Normals
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Robert Osfield wrote: > Hi Ben, > > The answer to the question "Has this bug been fixed in version 2.4" > can be found by browsing the SVN repository online: > > http://www.openscenegraph.org/projects/osg/browser/OpenSceneGraph/trunk/src/osgPlugins/vrml/ReaderWriterVRML2.cpp > > >> From this: > "3) Smoothed normals are computed if no normal field is provided. " > > So I'd guess that it is now fixed. > Ah, didn't know about this :) So my previous mail is moot then ... I am glad that people are actively improving this code. Regards, Jan -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mandriva - http://enigmail.mozdev.org iD8DBQFIKwLun11XseNj94gRAnFLAKCQOQ3zphxr/6jRFIdJdKyBXBK1VQCdF9P/ Cp0KEKwFJQem+DtKIsOO6Y0= =Xctu -END PGP SIGNATURE- ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] VRML Normals
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Ben Axelrod wrote: > > > I noticed that OSG 2.2 does not properly calculate the normals of VRML > files. It seems like it points all the normals at (0, -1, 0). This is > only when the normals are not explicitly specified in the file. If you > open a VRML file like this in osgviewer, you can see that the coloration > of the mesh is only accurate when looking at the top of the object. If > the normals are specified in the VRML file, then the mesh coloration > looks correct in osgviewer. I can supply an example VRML files that > demonstrate this bug, and also how to fix it. > > > > Has this bug been fixed in version 2.4? There is no code for normal generation in the plugin, if you do not specify the normals for the mesh, they will be wrong. You need to specify either the vertex or face normals. The goal was to write an importer for VRML generated by 3DS Max and similar tools, not to implement the full VRML spec (which says that the browser should generate normals if they are not provided). However, feel free to contribute a patch if you need this functionality. Regards, Jan -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mandriva - http://enigmail.mozdev.org iD8DBQFIKwJun11XseNj94gRApRGAKDNN7yAYLy9rTxm+tifhbYnJuLlIgCg2dnm Uju2pIaQS05eZzUWkIiJUg8= =RFSB -END PGP SIGNATURE- ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] VRML Normals
Hi Ben, The answer to the question "Has this bug been fixed in version 2.4" can be found by browsing the SVN repository online: http://www.openscenegraph.org/projects/osg/browser/OpenSceneGraph/trunk/src/osgPlugins/vrml/ReaderWriterVRML2.cpp >From this: "3) Smoothed normals are computed if no normal field is provided. " So I'd guess that it is now fixed. Robert. On Wed, May 14, 2008 at 3:21 PM, Ben Axelrod <[EMAIL PROTECTED]> wrote: > I noticed that OSG 2.2 does not properly calculate the normals of VRML > files. It seems like it points all the normals at (0, -1, 0). This is only > when the normals are not explicitly specified in the file. If you open a > VRML file like this in osgviewer, you can see that the coloration of the > mesh is only accurate when looking at the top of the object. If the normals > are specified in the VRML file, then the mesh coloration looks correct in > osgviewer. I can supply an example VRML files that demonstrate this bug, > and also how to fix it. > > > > Has this bug been fixed in version 2.4? > > > > Thanks, > > -Ben > > ___ > 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
[osg-users] VRML Normals
I noticed that OSG 2.2 does not properly calculate the normals of VRML files. It seems like it points all the normals at (0, -1, 0). This is only when the normals are not explicitly specified in the file. If you open a VRML file like this in osgviewer, you can see that the coloration of the mesh is only accurate when looking at the top of the object. If the normals are specified in the VRML file, then the mesh coloration looks correct in osgviewer. I can supply an example VRML files that demonstrate this bug, and also how to fix it. Has this bug been fixed in version 2.4? Thanks, -Ben ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
