import type { ArrayVector3D } from "./types.js";
/**
 * Sets the magnitude (length) of a 3D vector, maintaining its direction.
 * @param {ArrayVector3D} xyz - Vector as `[x, y, z]`
 * @param {number} newMagnitude - New magnitude
 * @param {number} [m] - Optional current magnitude (default: `magnitude3D(xyz)`)
 * @returns {ArrayVector3D} The adjusted vector
 */
export declare const setMagnitude3D: (xyz: ArrayVector3D, newMagnitude: number, m?: number) => ArrayVector3D;