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## com.vividsolutions.jts.geomgraph
Class Edge

    java.lang.Object
      com.vividsolutions.jts.geomgraph.GraphComponent
          com.vividsolutions.jts.geomgraph.Edge

    public class Edge

extends GraphComponent

Version:
  1.7

Field Summary

Fields inherited from class com.vividsolutions.jts.geomgraph.GraphComponent
`label`

Constructor Summary
`Edge(Coordinate[] pts)`
`Edge(Coordinate[] pts, Label label)`

Method Summary
`void` | `addIntersection(LineIntersector li, int segmentIndex, int geomIndex, int intIndex)` Add an EdgeIntersection for intersection intIndex.
`void` | `addIntersections(LineIntersector li, int segmentIndex, int geomIndex)` Adds EdgeIntersections for one or both intersections found for a segment of an edge to the edge intersection list.
`void` | `computeIM(IntersectionMatrix im)` Update the IM with the contribution for this component.
`boolean` | `equals(java.lang.Object o)` equals is defined to be:
`Edge` | `getCollapsedEdge()`
`Coordinate` | `getCoordinate()`
`Coordinate` | `getCoordinate(int i)`
`Coordinate[]` | `getCoordinates()`
`Depth` | `getDepth()`
`int` | `getDepthDelta()` The depthDelta is the change in depth as an edge is crossed from R to L
`EdgeIntersectionList` | `getEdgeIntersectionList()`
`Envelope` | `getEnvelope()`
`int` | `getMaximumSegmentIndex()`
`MonotoneChainEdge` | `getMonotoneChainEdge()`
`int` | `getNumPoints()`
`boolean` | `isClosed()`
`boolean` | `isCollapsed()` An Edge is collapsed if it is an Area edge and it consists of two segments which are equal and opposite (eg a zero-width V).
`boolean` | `isIsolated()` An isolated component is one that does not intersect or touch any other component.
`boolean` | `isPointwiseEqual(Edge e)`
`void` | `print(java.io.PrintStream out)`
`void` | `printReverse(java.io.PrintStream out)`
`void` | `setDepthDelta(int depthDelta)`
`void` | `setIsolated(boolean isIsolated)`
`void` | `setName(java.lang.String name)`
`static void` | `updateIM(Label label, IntersectionMatrix im)` Updates an IM from the label for an edge.

Methods inherited from class com.vividsolutions.jts.geomgraph.GraphComponent
`getLabel, isCovered, isCoveredSet, isInResult, isVisited, setCovered, setInResult, setLabel, setVisited, updateIM`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### Edge

    public Edge(Coordinate[] pts,
                Label label)

### Edge

    public Edge(Coordinate[] pts)

Method Detail

### updateIM

    public static void updateIM(Label label,
                                IntersectionMatrix im)

  Updates an IM from the label for an edge. Handles edges from both L and A geometries.

### getNumPoints

    public int getNumPoints()

### setName

    public void setName(java.lang.String name)

### getCoordinates

    public Coordinate[] getCoordinates()

### getCoordinate

    public Coordinate getCoordinate(int i)

### getCoordinate

    public Coordinate getCoordinate()

  Specified by:
    `getCoordinate` in class `GraphComponent`
  Returns:
    a coordinate in this component (or null, if there are none)

### getEnvelope

    public Envelope getEnvelope()

### getDepth

    public Depth getDepth()

### getDepthDelta

    public int getDepthDelta()

  The depthDelta is the change in depth as an edge is crossed from R to L

  Returns:
    the change in depth as the edge is crossed from R to L

### setDepthDelta

    public void setDepthDelta(int depthDelta)

### getMaximumSegmentIndex

    public int getMaximumSegmentIndex()

### getEdgeIntersectionList

    public EdgeIntersectionList getEdgeIntersectionList()

### getMonotoneChainEdge

    public MonotoneChainEdge getMonotoneChainEdge()

### isClosed

    public boolean isClosed()

### isCollapsed

    public boolean isCollapsed()

  An Edge is collapsed if it is an Area edge and it consists of two segments which are equal and opposite (eg a zero-width V).

### getCollapsedEdge

    public Edge getCollapsedEdge()

### setIsolated

    public void setIsolated(boolean isIsolated)

### isIsolated

    public boolean isIsolated()

  Description copied from class: `GraphComponent`
  An isolated component is one that does not intersect or touch any other component. This is the case if the label has valid locations for only a single Geometry.

  Specified by:
    `isIsolated` in class `GraphComponent`
  Returns:
    true if this component is isolated

### addIntersections

    public void addIntersections(LineIntersector li,
                                 int segmentIndex,
                                 int geomIndex)

  Adds EdgeIntersections for one or both intersections found for a segment of an edge to the edge intersection list.

### addIntersection

    public void addIntersection(LineIntersector li,
                                int segmentIndex,
                                int geomIndex,
                                int intIndex)

  Add an EdgeIntersection for intersection intIndex. An intersection that falls exactly on a vertex of the edge is normalized to use the higher of the two possible segmentIndexes

### computeIM

    public void computeIM(IntersectionMatrix im)

  Update the IM with the contribution for this component. A component only contributes if it has a labelling for both parent geometries

  Specified by:
    `computeIM` in class `GraphComponent`

### equals

    public boolean equals(java.lang.Object o)

  equals is defined to be:

  e1 equals e2 iff the coordinates of e1 are the same or the reverse of the coordinates in e2

  Overrides:
    `equals` in class `java.lang.Object`

### isPointwiseEqual

    public boolean isPointwiseEqual(Edge e)

  Returns:
    true if the coordinate sequences of the Edges are identical

### print

    public void print(java.io.PrintStream out)

### printReverse

    public void printReverse(java.io.PrintStream out)

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