import type { ArrayVector3D } from "./types.js";
/**
 * Adds two 3D vectors.
 * @param {ArrayVector3D} xyz1 - First vector as `[x, y, z]`
 * @param {ArrayVector3D} xyz2 - Second vector as `[x, y, z]`
 * @returns {ArrayVector3D} The sum of the vectors
 */
export declare const add3D: (xyz1: ArrayVector3D, xyz2: ArrayVector3D) => ArrayVector3D;