import type { ArrayVector2D } from "./types.js";
/**
 * Calculates the 2D vector angle of a vector pointing at another.
 * @param {ArrayVector2D} xy1 - First vector as `[x, y]`
 * @param {ArrayVector2D} xy2 - Second vector as `[x, y]` (target to look at)
 * @param {number} [m1] - Optional current magnitude of the first vector (default: magnitude2D(xy1))
 * @param {number} [m2] - Optional current magnitude of the second vector (default: magnitude2D(xy2))
 * @returns {ArrayVector2D} Vector pointing at the target with the magnitude of xy1
 */
export declare const lookAt2D: (xy1: ArrayVector2D, xy2: ArrayVector2D, m1?: number, m2?: number) => ArrayVector2D;