checkAreaLabelsConsistent method

bool checkAreaLabelsConsistent(int geomIndex)

Implementation

bool checkAreaLabelsConsistent(int geomIndex) {
  // Since edges are stored in CCW order around the node,
  // As we move around the ring we move from the right to the left side of the edge
  List edges = getEdges();
  // if no edges, trivially consistent
  if (edges.length <= 0) return true;
  // initialize startLoc to location of last L side (if any)
  int lastEdgeIndex = edges.length - 1;
  Label startLabel = (edges[lastEdgeIndex] as EdgeEnd).getLabel()!;
  int startLoc = startLabel.getLocationWithPosIndex(geomIndex, Position.LEFT);
  // TODO Assert.isTrue(startLoc != Location.NONE, "Found unlabelled area edge");

  int currLoc = startLoc;
  for (Iterator it = iterator(); it.moveNext();) {
    EdgeEnd e = it.current;
    Label label = e.getLabel()!;
    // we assume that we are only checking a area
    // TODO Assert.isTrue(label.isArea(geomIndex), "Found non-area edge");
    int leftLoc = label.getLocationWithPosIndex(geomIndex, Position.LEFT);
    int rightLoc = label.getLocationWithPosIndex(geomIndex, Position.RIGHT);
//System.out.println(leftLoc + " " + rightLoc);
//Debug.print(this);
    // check that edge is really a boundary between inside and outside!
    if (leftLoc == rightLoc) {
      return false;
    }
    // check side location conflict
    //Assert.isTrue(rightLoc == currLoc, "side location conflict " + locStr);
    if (rightLoc != currLoc) {
//Debug.print(this);
      return false;
    }
    currLoc = leftLoc;
  }
  return true;
}