Hi, Gordon, Thank you for your reply. I already understood.
Yun On Mon, Jul 20, 2009 at 3:42 PM, Tomlinson, Gordon < [email protected]> wrote: > Which part don't you fully understand ? > > the fact the your BS center is moving or the NAN ? > > > > > Gordon > Product Manager 3d > __________________________________________________________ > Gordon Tomlinson > Email : gtomlinson @ overwatch.textron.com > __________________________________________________________ > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Lingyun > Yu > Sent: Monday, July 20, 2009 4:36 AM > To: [email protected] > Subject: [osg-users] how matrixTransform works? > > Hi, everybody > > Could someone explain me how matrixTransform works? > In the updatecallback, I set the matrixTransform like this > > static float c = 1.0; > c = c + 0.01; > > mt->setMatrix(osg::Matrixf::translate(-bs.center()) * > osg::Matrixf::scale(1.0, c, 1.0) osg::Matrixf::translate(bs.center())); > > With the time goes by, the center of boundingbox will change frequently. > At the end, some error happens like > > CullVisitor::apply<Geode&> detected NaN, depth=1.#QNAN, center=<49.8655 > 50.2613 50.5221>, matrix = { > 1 0 0 0 > 0 0 -7.21007 0 > 0 1 0 0 > -1.#IND -1.#IND -1.#IND -1.#IND} > > If anybody meets this ever before? > > ... > > Thank you! > > Cheers, > Lingyun > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=15131#15131 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or > g<http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or%0Ag> > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- Cheers, Yun
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