import type { ArrayVector3D } from "./types.js";
/**
 * Projects one 3D vector onto the second.
 * @param {ArrayVector3D} xyz1 - Vector to project
 * @param {ArrayVector3D} xyz2 - Vector to project onto
 * @param {number} [m1] - Optional magnitude of the vector to project (default: `magnitude3D(xyz1)`)
 * @param {number} [m2] - Optional magnitude of the vector to project onto (default: `magnitude3D(xyz2)`)
 * @returns {ArrayVector3D} The projected vector
 */
export declare const project3D: (xyz1: ArrayVector3D, xyz2: ArrayVector3D, m1?: number, m2?: number) => ArrayVector3D;