import type { ArrayVector3D } from "./types.js";
/**
 * Reflects a vector across a normal vector.
 * The normal vector should be normalized (unit length).
 * @param {ArrayVector3D} xyz - Vector as `[x, y, z]` to reflect
 * @param {ArrayVector3D} normal - Normal vector to reflect across (must be normalized)
 * @returns {ArrayVector3D} The reflected vector
 */
export declare const reflect3D: (xyz: ArrayVector3D, normal: ArrayVector3D) => ArrayVector3D;