import type { ArrayVector4D } from "./types.js";
/**
 * Reflects a 4D vector across a normal vector.
 * The normal vector should be normalized (unit length).
 * @param {ArrayVector4D} xyzw - Vector as `[x, y, z, w]`
 * @param {ArrayVector4D} normal - Normal vector (must be normalized)
 * @returns {ArrayVector4D} The reflected vector
 */
export declare const reflect4D: (xyzw: ArrayVector4D, normal: ArrayVector4D) => ArrayVector4D;