Field Detail

• isForward

  protected boolean isForward

Constructor Detail

• DirectedEdge

  public DirectedEdge(Edge edge,
                      boolean isForward)

Method Detail

• depthFactor

  public static int depthFactor(int currLocation,
                                int nextLocation)

  Computes the factor for the change in depth when moving from one location to another. E.g. if crossing from the INTERIOR to the EXTERIOR the depth decreases, so the factor is -1

• getEdge

  public Edge getEdge()

• setInResult

  public void setInResult(boolean isInResult)

• isInResult

  public boolean isInResult()

• isVisited

  public boolean isVisited()

• setVisited

  public void setVisited(boolean isVisited)

• setEdgeRing

  public void setEdgeRing(EdgeRing edgeRing)

• getEdgeRing

  public EdgeRing getEdgeRing()

• setMinEdgeRing

  public void setMinEdgeRing(EdgeRing minEdgeRing)

• getMinEdgeRing

  public EdgeRing getMinEdgeRing()

• getDepth

  public int getDepth(int position)

• setDepth

  public void setDepth(int position,
                       int depthVal)

• getDepthDelta

  public int getDepthDelta()

• setVisitedEdge

  public void setVisitedEdge(boolean isVisited)

  setVisitedEdge marks both DirectedEdges attached to a given Edge. This is used for edges corresponding to lines, which will only appear oriented in a single direction in the result.

• getSym

  public DirectedEdge getSym()

  Each Edge gives rise to a pair of symmetric DirectedEdges, in opposite directions.

  Returns:

  the DirectedEdge for the same Edge but in the opposite direction

• isForward

  public boolean isForward()

• setSym

  public void setSym(DirectedEdge de)

• getNext

  public DirectedEdge getNext()

• setNext

  public void setNext(DirectedEdge next)

• getNextMin

  public DirectedEdge getNextMin()

• setNextMin

  public void setNextMin(DirectedEdge nextMin)

• isLineEdge

  public boolean isLineEdge()

  This edge is a line edge if

  • at least one of the labels is a line label
  • any labels which are not line labels have all Locations = EXTERIOR

• isInteriorAreaEdge

  public boolean isInteriorAreaEdge()

  This is an interior Area edge if

  • its label is an Area label for both Geometries
  • and for each Geometry both sides are in the interior.

  Returns:

  true if this is an interior Area edge

• setEdgeDepths

  public void setEdgeDepths(int position,
                            int depth)

  Set both edge depths. One depth for a given side is provided. The other is computed depending on the Location transition and the depthDelta of the edge.

• print

  public void print(PrintStream out)

• printEdge

  public void printEdge(PrintStream out)