compareTo method
@return -1 this SegmentNode is located before the argument location; 0 this SegmentNode is at the argument location; 1 this SegmentNode is located after the argument location
Implementation
int compareTo(SegmentNode obj) {
SegmentNode other = obj;
if (segmentIndex < other.segmentIndex) return -1;
if (segmentIndex > other.segmentIndex) return 1;
if (coord.equals2D(other.coord)) return 0;
// an exterior node is the segment start point, so always sorts first
// this guards against a robustness problem where the octants are not reliable
if (!_isInterior) return -1;
if (!other._isInterior) return 1;
return SegmentPointComparator.compare(segmentOctant, coord, other.coord);
//return segment.compareNodePosition(this, other);
}