// do the Vertex and Position ducks first
for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)
if ((*iter)->get_type() == Duck::TYPE_VERTEX ||
// do the Vertex and Position ducks first
for(i=0,iter=selected_ducks.begin();iter!=selected_ducks.end();++iter,i++)
if ((*iter)->get_type() == Duck::TYPE_VERTEX ||