osg::DrawElementsUInt

#include <osg/Geometry>
#include <osg/Geode>
#include <osgUtil/SmoothingVisitor>
#include <osgViewer/Viewer>

int main(int argc, char** argv)
{
osg::ref_ptr<osg::Vec3Array> vertices = new osg::Vec3Array(6);
(*vertices)[0].set(0.0f, 0.0f, 1.0f);
(*vertices)[1].set(-0.5f, -0.5f, 0.0f);
(*vertices)[2].set(0.5f, -0.5f, 0.0f);
(*vertices)[3].set(0.5f, 0.5f, 0.0f);
(*vertices)[4].set(-0.5f, 0.5f, 0.0f);
(*vertices)[5].set(0.0f, 0.0f, -1.0f);

osg::ref_ptr<osg::DrawElementsUInt> indices =
new osg::DrawElementsUInt(GL_TRIANGLES, 24);
int index[24] = { 0, 1, 2,
0, 2, 3,
0, 3, 4,
0, 4, 1,
5, 2, 1,
5, 3, 2,
5, 4, 3,
5, 1, 4 };
for (int i = 0; i < 24; i++)
{
(*indices)[i] = index[i];
}

osg::ref_ptr<osg::Geometry> geom = new osg::Geometry;
geom->setVertexArray(vertices.get());
geom->addPrimitiveSet(indices.get());
osgUtil::SmoothingVisitor::smooth(*geom);

osg::ref_ptr<osg::Geode> root = new osg::Geode;
root->addDrawable(geom.get());
osgViewer::Viewer viewer;
viewer.setSceneData(root.get());
return viewer.run();
}