import type { GridCoord2D } from "./api.js";
/**
 * Returns true if x,y is on a right-to-left diagonal with spacing `n`.
 *
 * @param x
 * @param y
 * @param n
 */
export declare const isOnDiagonal: ([x, y]: GridCoord2D, n: number) => boolean;
/**
 * Returns true if x,y is on a left-to-right diagonal with spacing `n`.
 *
 * @param x
 * @param y
 * @param n
 */
export declare const isOnDiagonalAlt: ([x, y]: GridCoord2D, N: number) => boolean;
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