org.apache.commons.math3.geometry.spherical.twod

Class Edge

java.lang.Object

org.apache.commons.math3.geometry.spherical.twod.Edge

public class Edge
extends Object

Spherical polygons boundary edge.

Since:

3.3

See Also:

SphericalPolygonsSet.getBoundaryLoops(), Vertex

Method Summary

Modifier and Type	Method and 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

equals, 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