import { Vector } from "../physics/Vector";
/**
 * Stores a two dimensional lazily-loaded grid.
 * Relies upon `T` never being null or undefined.
 */
export declare class WorldLayer<T> {
    private readonly factory;
    _real: T[][][];
    get state(): T[][][];
    set state(x: T[][][]);
    constructor(factory: T);
    getv(layer: number, { x, y }: Vector): T;
    get(layer: number, x: number, y: number): T;
    set(layer: number, x: number, y: number, it: T): void;
    sanitize(): void;
    putBorder(width: number, height: number, layer: number, id: T): void;
    /**
     * Because `state` could be empty, this will perform all the necessary checks
     * to create or update a value in the grid.
     */
    private getYsSafe;
    static layer<T>(world: T[][][], layer: number): T[][];
    static ys<T>(layer: T[][], y: number): T[];
}