public void computeDepthParity(){
  while (true) {
    PolygonizeDirectedEdge de=null;
    if (de == null)     return;
    computeDepthParity(de);
  }
}

public void computeDepthParity ( ) { while ( true ) { PolygonizeDirectedEdge de = null ; if ( de == null ) return ; computeDepthParity ( de ) ; } }
traverses the polygonized edge rings in the graph and computes the depth parity ( odd or even ) relative to the exterior of the graph . if the client has requested that the output be polygonally valid , only odd polygons will be constructed .
