Hi Pete, Your CullFace code looks correct, but.. its probably ShapeDrawable that is playing games with you... as it has the ability to draw both back and front faces, it has this to enable it to multipass build up of transparent sphere's without the normal visual artifcats of rendering transparent double surfaced objects.
What are you using the sphere for? Why only the front face needs to be rendered? Would create the geometry by hand using osg::Geometry suit? Robert. On 6/19/06, Pete Carss <[EMAIL PROTECTED]> wrote:
Hello All, I've been hacking osgprerendercubemap to do fisheye correction for projection onto a dome. I have modified the example to load an osg file, and render this to the sphere surface. Everything is working swimmingly - better performance than I'd expected (this is Gentoo on a Macbook Pro) - what I need to do though, is to cull the front faces of the sphere. I had thought the following would do it: ref_ptr<ShapeDrawable> shape = new ShapeDrawable(new Sphere(Vec3(0.0f, 0.0f, 0.0f), radius * 1500.0f), hints.get()); osg::StateSet* stateset = shape->getOrCreateStateSet(); //cull front faces osg::CullFace* cullFace = new osg::CullFace(); cullFace->setMode(osg::CullFace::FRONT); stateset->setAttribute(cullFace); stateset->setMode(GL_CULL_FACE, osg::StateAttribute::ON); stateset->setAttributeAndModes(new osg::CullFace, osg::StateAttribute::ON); shape->setStateSet(stateset); Am I barking up the wrong tree? Pete Carss - Research Assistant, Immersive Vision [ i ][>][...] - Institute of Digital Art and Technology CETL (Centre for Excellence in Teaching & Learning) Experiential Learning in Environmental & Natural Sciences University of Plymouth, Drake Circus, Plymouth, PL4 8AA, Devon, UK _______________________________________________ osg-users mailing list [email protected] http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
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