/**
 * Spherical Voronoi diagram — a consumer of the 3-D convex hull.
 *
 * For points on a sphere, the convex hull of the points IS the spherical
 * Delaunay triangulation; the Voronoi vertices are the circumcenters of the
 * hull facets projected onto the sphere (equivalently, the facet normals scaled
 * to the sphere radius). `sphericalVoronoi` returns those vertices, each
 * generator's region (as an ordered ring of vertex indices), and the geodesic
 * area of each region.
 *
 * Pinned against `scipy.spatial.SphericalVoronoi` (vertex count `= 2N − 4` and
 * region areas summing to `4πr²`) in
 * `functions/tests/geometry-consumers-oracle.test.ts`.
 *
 * @packageDocumentation
 */
/** Structured spherical-Voronoi result (mirrors `scipy.spatial.SphericalVoronoi`). */
export interface SphericalVoronoiResult {
    /** Voronoi vertices on the sphere (the hull facets' circumcenters). */
    vertices: number[][];
    /**
     * Per input point: the ordered ring of vertex indices (into
     * {@link SphericalVoronoiResult.vertices}) bounding that generator's cell.
     */
    regions: number[][];
    /** Per input point: the geodesic (surface) area of its Voronoi cell. */
    areas: number[];
}
/**
 * Spherical Voronoi diagram of points on a sphere.
 *
 * @param points - Array of `[x, y, z]` points on (or near) the sphere. At least
 *   4 points, not all coplanar with the centre.
 * @param radius - Sphere radius (default `1`).
 * @param center - Sphere centre (default origin).
 * @returns A {@link SphericalVoronoiResult}.
 * @throws When given fewer than 4 points or a non-3-D point set.
 */
export declare function sphericalVoronoi(points: number[][], radius?: number, center?: number[]): SphericalVoronoiResult;
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