HalfedgeHandle

java.lang.Object
- Jcg.triangulations2D.HalfedgeHandle<X>

```
public class HalfedgeHandle<X extends Point_>
extends java.lang.Object
```
A dummy class used to represent a triangulation edge as a pair (TriangulationDSFace_2, int). The integer parameter is the index of the vertex opposite to the edge in the triangle. Note that no edge is explicitly stored in the triangulation data structure, as this information is redundant with the one provided by the faces themselves and their vertices.

Author:

Luca Castelli Aleardi

Constructor Summary

Constructors
Constructor and Description

HalfedgeHandle(TriangulationDSFace_2<X> c, int i)

Constructors
Constructor and Description
`HalfedgeHandle(TriangulationDSFace_2<X> c, int i)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`equals(java.lang.Object o)` tests equality between EdgeHandles, which is defined by equality of their vertices.
`TriangulationDSFace_2<X>`	`getFace()` returns the face containing the half-edge.
`HalfedgeHandle<X>`	`getNext()` returns next half-edge in ccw order in the same face.
`HalfedgeHandle<X>`	`getOpposite()` returns opposite half-edge (lying in the adjacent face).
`HalfedgeHandle<X>`	`getPrev()` returns the previous half-edge in ccw order in the same face.
`TriangulationDSVertex_2<X>`	`getVertex()` returns the (destination) vertex incident the edge.
`TriangulationDSVertex_2<X>`	`getVertex(int index)` returns the vertex of prescribed index in the edge: 0 for origin, 1 for destination
`int`	`hashCode()` provides a hashing index for a EdgeHandle, based on the hashing indices of its vertices.
`boolean`	`hasVertex(TriangulationDSVertex_2<X> v)` returns whether the current edge has v as vertex.
`int`	`index()` returns the index of the vertex opposite of the current edge in the corresponding incident face.
`int`	`index(TriangulationDSVertex_2<X> v)` returns the index of v in the current edge.
`void`	`invertMark()` inverts the mark of the edge (the mark of the opposite edge remains unchanged)
`boolean`	`isMarked()` returns the mark of the edge
`void`	`mark()` sets the mark of the edge (the mark of the opposite edge remains unchanged)
`void`	`setMark(boolean m)` sets the mark of the edge (the mark of the opposite edge remains unchanged)
`java.lang.String`	`toString()`
`void`	`unmark()` unsets the mark of the edge (the mark of the opposite edge remains unchanged)

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - HalfedgeHandle
```
public HalfedgeHandle(TriangulationDSFace_2<X> c,
                      int i)
```
- Method Detail
  - getFace
```
public TriangulationDSFace_2<X> getFace()
```
    returns the face containing the half-edge.
  - getVertex
```
public TriangulationDSVertex_2<X> getVertex()
```
    returns the (destination) vertex incident the edge.
  - getNext
```
public HalfedgeHandle<X> getNext()
```
    returns next half-edge in ccw order in the same face.
  - getPrev
```
public HalfedgeHandle<X> getPrev()
```
    returns the previous half-edge in ccw order in the same face.
  - getOpposite
```
public HalfedgeHandle<X> getOpposite()
```
    returns opposite half-edge (lying in the adjacent face).
  - getVertex
```
public TriangulationDSVertex_2<X> getVertex(int index)
```
    returns the vertex of prescribed index in the edge: 0 for origin, 1 for destination
  - index
```
public int index()
```
    returns the index of the vertex opposite of the current edge in the corresponding incident face.
  - hasVertex
```
public boolean hasVertex(TriangulationDSVertex_2<X> v)
```
    returns whether the current edge has v as vertex.
  - index
```
public int index(TriangulationDSVertex_2<X> v)
```
    returns the index of v in the current edge. The pre-requisite is that v must be a vertex of the edge.
  - equals
```
public boolean equals(java.lang.Object o)
```
    tests equality between EdgeHandles, which is defined by equality of their vertices.
    
    Overrides:
    
    equals in class java.lang.Object
  - hashCode
```
public int hashCode()
```
    provides a hashing index for a EdgeHandle, based on the hashing indices of its vertices.
    
    Overrides:
    
    hashCode in class java.lang.Object
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object
  - isMarked
```
public boolean isMarked()
```
    returns the mark of the edge
  - mark
```
public void mark()
```
    sets the mark of the edge (the mark of the opposite edge remains unchanged)
  - unmark
```
public void unmark()
```
    unsets the mark of the edge (the mark of the opposite edge remains unchanged)
  - invertMark
```
public void invertMark()
```
    inverts the mark of the edge (the mark of the opposite edge remains unchanged)
  - setMark
```
public void setMark(boolean m)
```
    sets the mark of the edge (the mark of the opposite edge remains unchanged)

Class HalfedgeHandle<X extends Point_>

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

HalfedgeHandle

Method Detail

getFace

getVertex

getNext

getPrev

getOpposite

getVertex

index

hasVertex

index

equals

hashCode

toString

isMarked

mark

unmark

invertMark

setMark