/**
 * Approximate 3D insphere test. Robust
 *
 *
 * @param {number[]} points
 * @param {number} a tetrahedral point index
 * @param {number} b tetrahedral point index
 * @param {number} c tetrahedral point index
 * @param {number} d tetrahedral point index
 * @param {number} e reference point index that we are testing against the tetrahedron
 * @returns {number}
 */
export function in_sphere3d_robust(points: number[], a: number, b: number, c: number, d: number, e: number): number;
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