nl_tokens: Removes all the visible vertices that a given face is able to see which are stored in the assigned vertext list
pl_tokens: function ( face ) { if ( face . outside !== null ) { // reference to the first and last vertex of this face var start = face . outside ; var end = face . outside ; while ( end . next !== null && <mask> . next . face === face ) { end = end . next ; } this . assigned . removeSubList ( start , end ) ; // fix references start . prev = end . next = null ; face . outside = null ; return start ; } }