import Flatbush from 'flatbush';
import type { SnapBox } from '../snap';
/** Hard cap after a wide AABB hit — Flatbush.neighbors() keeps the closest K. */
export declare const SNAP_NEIGHBOR_K = 32;
export type SnapLine = {
    value: number;
    min: number;
    max: number;
    kind: 'edge' | 'center';
};
/** Segmented Flatbush 2D index plus 1D X/Y snap-line trees. Built on pointerdown. */
export type SnapIndex = {
    tree: Flatbush;
    boxes: SnapBox[];
    linesX: Flatbush;
    linesY: Flatbush;
    metaX: SnapLine[];
    metaY: SnapLine[];
};
export declare const buildSnapIndex: (boxes: SnapBox[]) => SnapIndex;
export declare const querySnap: (index: SnapIndex, moving: SnapBox, pad: number) => number[];
export declare const boxesNear: (index: SnapIndex, moving: SnapBox, pad: number) => SnapBox[];
export declare const queryLinesX: (index: SnapIndex, value: number, threshold: number, rangeMin: number, rangeMax: number) => SnapLine[];
export declare const queryLinesY: (index: SnapIndex, value: number, threshold: number, rangeMin: number, rangeMax: number) => SnapLine[];