Hi, I remember there is some code using TangentSpaceGenerator and setVertexAttribArray(), but I can't find them in current OpenSceneGraph version:
... osg::ref_ptr<osgUtil::TangentSpaceGenerator> tsg = new osgUtil::TangentSpaceGenerator; tsg->generate(geo, 0); geo->setVertexAttribArray(6, tsg->getTangentArray()); geo->setVertexAttribBinding(6, osg::Geometry::BIND_PER_VERTEX); ... Wang Rui
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