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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.
| Nef_polyhedron_S2<Traits>::Sphere_point::RT | |
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ring number type.
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| Nef_polyhedron_S2<Traits>::Sphere_point p; | |
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creates some sphere point.
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| Nef_polyhedron_S2<Traits>::Sphere_point p ( RT x, RT y, RT z); | |
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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.
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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. |