Edge (Hipparchus 1.4 API)

java.lang.Object
- org.hipparchus.geometry.spherical.twod.Edge

```
public class Edge
extends Object
```
Spherical polygons boundary edge.

See Also:

SphericalPolygonsSet.getBoundaryLoops(), Vertex

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Circle`	`getCircle()`	Get the circle supporting this edge.
`Vertex`	`getEnd()`	Get end vertex.
`double`	`getLength()`	Get the length of the arc.
`Vector3D`	`getPointAt(double alpha)`	Get an intermediate point.
`Vertex`	`getStart()`	Get start vertex.

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

- Method Detail
  - getStart
```
public Vertex getStart()
```
    Get start vertex.
    
    Returns:
    
    start vertex
  - getEnd
```
public Vertex getEnd()
```
    Get end vertex.
    
    Returns:
    
    end vertex
  - getLength
```
public double getLength()
```
    Get the length of the arc.
    
    Returns:
    
    length of the arc (can be greater than \( \pi \))
  - getCircle
```
public Circle getCircle()
```
    Get the circle supporting this edge.
    
    Returns:
    
    circle supporting this edge
  - getPointAt
```
public Vector3D getPointAt(double alpha)
```
    Get an intermediate point.
    The angle along the edge should normally be between 0 and getLength() in order to remain within edge limits. However, there are no checks on the value of the angle, so user can rebuild the full circle on which an edge is defined if they want.
    
    Parameters:
    
    alpha - angle along the edge, counted from getStart()
    
    Returns:
    
    an intermediate point