/** Bit-mask layer system for selective rendering and raycasting. */
export declare class Layers {
    #private;
    /** Current bitmask. */
    get mask(): number;
    /** Set the mask to a single layer. */
    set(layer: number): void;
    /** Enable a layer (add it to the mask). */
    enable(layer: number): void;
    /** Enable all 32 layers. */
    enableAll(): void;
    /** Toggle a layer on/off. */
    toggle(layer: number): void;
    /** Disable a layer (remove it from the mask). */
    disable(layer: number): void;
    /** Disable all layers. */
    disableAll(): void;
    /** Test whether this mask overlaps another Layers mask. */
    test(layers: Layers): boolean;
    /** Test if a specific layer is enabled. */
    isEnabled(layer: number): boolean;
}
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