renderer.set_element_buffer(ibuf);
renderer.set_winding_test(winding);
for(list<Batch>::const_iterator i=batches.begin(); i!=batches.end(); ++i)
renderer.draw(*i);
renderer.set_element_buffer(ibuf);
renderer.set_winding_test(winding);
for(list<Batch>::const_iterator i=batches.begin(); i!=batches.end(); ++i)
renderer.draw(*i);