nl_tokens: Removes all the visible vertices that face is able to see
pl_tokens: function ( face , absorbingFace ) { var faceVertices = this . removeAllVerticesFromFace ( face ) ; if ( faceVertices !== undefined ) { if ( absorbingFace === undefined ) { // mark the vertices to be reassigned to some other face this . unassigned . appendChain ( faceVertices ) ; } else { // if there's an absorbing face try to assign as many vertices as possible to it var vertex = faceVertices ; do { // we need to buffer the subsequent vertex at this point because the 'vertex.next' reference // will be changed by upcoming method calls var nextVertex = vertex . next ; var <mask> = absorbingFace . distanceToPoint ( vertex . point ) ; // check if 'vertex' is able to see 'absorbingFace' if ( distance > this . tolerance ) { this . addVertexToFace ( vertex , absorbingFace ) ; } else { this . unassigned . append ( vertex ) ; } // now assign next vertex vertex = nextVertex ; } while ( vertex !== null ) ; } } return this ; }