_geom = new osg::Geometry();
_geom->setColorArray(colors);
_geom->setColorBinding(osg::Geometry::BIND_PER_PRIMITIVE_SET);
_geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS, 0, 0));
_geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS, 0, 0));
_geom = new osg::Geometry();
_geom->setColorArray(colors);
_geom->setColorBinding(osg::Geometry::BIND_PER_PRIMITIVE_SET);
_geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS, 0, 0));
_geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS, 0, 0));