CGAL::Nef_polyhedron_S2<Traits>::Sphere_point

Definition

An object p of type Sphere_point<R> is a point on the surface of a unit sphere. Such points correspond to the nontrivial directions in space and similarly to the equivalence classes of all nontrivial vectors under normalization.

Types

Nef_polyhedron_S2<Traits>::Sphere_point::RT
	ring number type.

Creation

Nef_polyhedron_S2<Traits>::Sphere_point p;
	creates some sphere point.
Nef_polyhedron_S2<Traits>::Sphere_point p ( RT x, RT y, RT z);
	creates a sphere point corresponding to the point of intersection of the ray starting at the origin in direction $$(x,y,z) and the surface of $$S2.

Operations

Access to the coordinates is provided by the following operations. Note that the vector $$(x,y,z) is not normalized.

RT	p.x ()	the $$x-coordinate.
RT	p.y ()	the $$y-coordinate.
RT	p.z ()	the $$z-coordinate.
bool	p == q	Equality.
bool	p != q	Inequality.
Sphere_point	p.antipode ()	returns the antipode of p.