int main( int argc, char **argv )
{
osg::ArgumentParser arguments(&argc, argv);
// Make a scene graph consisting of a single Geode, containing
// a single Geometry, and a single PrimitiveSet.
osg::ref_ptr< osg::Geode > geode = new osg::Geode;
osg::ref_ptr< osg::Geometry > geom = new osg::Geometry;
// Configure the Geometry for use with EXT_draw_arrays:
// DL off and buffer objects on.
geom->setUseDisplayList( false );
geom->setUseVertexBufferObjects( true );
// OSG has no clue where out vertex shader will place the geometric data,
// so specify an initial bound to allow proper culling and near/far computation.
osg::BoundingBox bb( -1., -.1, -1., 49., 1., 49. );
geom->setInitialBound( bb );
// Add geometric data and the PrimitiveSet. Specify numInstances as 32*32 or 1024.
createDAIGeometry( *geom, 32*32 );
geode->addDrawable( geom.get() );
// Create a StateSet to render the instanced Geometry.
osg::ref_ptr< osg::StateSet > ss = createStateSet();
geode->setStateSet( ss.get() );
// osgDB::writeNodeFile(*geode, "instanced.osgt");
osgViewer::Viewer viewer(arguments);
viewer.setSceneData( geode.get() );
return viewer.run();
}
osg::Geometry* createGrassGeom()
{
osg::Geometry* geom = new osg::Geometry;
geom->setUseDisplayList( false );
geom->setUseVertexBufferObjects( true );
createDAIGeometry( *geom, cc*cc );
//osg::BoundingBox bb( -50., -.50, -50., 100., 100., 100. );
osg::BoundingBox bb( -5., -.5, -5., 10., 10., 10. );
geom->setInitialBound( bb );
return geom;
}
