import type { ArrayVector4D } from "./types.js";
/**
 * Calculates the Euclidean distance between two 4D vectors.
 * @param {ArrayVector4D} xyzw1 - First vector as `[x, y, z, w]`
 * @param {ArrayVector4D} xyzw2 - Second vector as `[x, y, z, w]`
 * @returns {number} The distance
 */
export declare const distance4D: (xyzw1: ArrayVector4D, xyzw2: ArrayVector4D) => number;