Hi Ilia, face culling only works on polygons.
Robert. On Thu, Sep 11, 2008 at 2:20 PM, Korolyov Ilia <[EMAIL PROTECTED]> wrote: > Hello > > This technic working fine for poligons, but is it possible to make this > trick to lines? I need exactly two lines, not three as in triangle. > > I trying in such way > > group->addChild( geode_with_poligons ); > group->addChild( geode_with_lines ); > group->getOrCreateStateSet()->setMode( GL_CULL_FACE, GL_BACK | > osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON ); > > Thanks > Ilia > > В Чтв, 11/09/2008 в 14:46 +0400, Korolyov Ilia пишет: >> Hello, Robert >> >> Thanks so much - it really helps >> >> Ilia >> >> В Чтв, 11/09/2008 в 11:38 +0100, Robert Osfield пишет: >> > Hi Ilia, >> > >> > If one side of the plane should be red, and the other blue then you >> > could render two polygons for the plane, each with opposite winding >> > and colour, then use glCullFace(osg::CullFace) to cull the faces to >> > give the illusion of changing colour. The other technique you could >> > use of two sided colour in the OpenGL lighting/material model, not all >> > hardware/drivers supports two side lighting though. >> > >> > Robert. >> > >> > On Thu, Sep 11, 2008 at 11:22 AM, Korolyov Ilia <[EMAIL PROTECTED]> wrote: >> > > Hello >> > > >> > > I need to draw a plane (more exactly two lines by three points). Problem >> > > is in plane color. It must depends on camera position relative >> > > plane side - red or blue. >> > > >> > > I did it with CullCallback, because it's only one way to get access to >> > > camera, which I can find. >> > > >> > > What is right way to do it? >> > > >> > > Thanks >> > > Ilia >> > > >> > > _______________________________________________ >> > > 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 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 mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
