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

This package provides basic geometry components on the 2-sphere.

See: Description

• Class Summary
Class Description
Circle
This class represents an oriented great circle on the 2-sphere.
Edge
Spherical polygons boundary edge.
S2Point
This class represents a point on the 2-sphere.
Sphere2D
This class implements a two-dimensional sphere (i.e. the regular sphere).
SphericalPolygonsSet
This class represents a region on the 2-sphere: a set of spherical polygons.
SubCircle
This class represents a sub-hyperplane for Circle.
Vertex
Spherical polygons boundary vertex.

## Package org.apache.commons.math3.geometry.spherical.twod Description

This package provides basic geometry components on the 2-sphere.

We use here the topologists definition of the 2-sphere (see Sphere on MathWorld), i.e. the 2-sphere is the two-dimensional surface defined in 3D as x2+y2+z2=1.