export type HitBox = {
    minX: number;
    minY: number;
    maxX: number;
    maxY: number;
    id: string;
    zIndex: number;
};
/** Dynamic RBush of visual hit rects. load() replaces the current set. */
export declare class HitIndex {
    private tree;
    clear(): void;
    load(items: HitBox[]): void;
    insert(item: HitBox): void;
    remove(item: HitBox): void;
    search(minX: number, minY: number, maxX: number, maxY: number): HitBox[];
    hitPoint(x: number, y: number): HitBox | null;
}