export type CorridorPoint = readonly [number, number];
export interface CorridorEdge {
    /** Centerline polyline in XZ; at least two points. */
    points: readonly CorridorPoint[];
    /** Full corridor width around the centerline. */
    width: number;
}
export interface CorridorSample {
    /** Distance from the query point to the nearest centerline. */
    distance: number;
    /** Nearest point on that centerline. */
    closest: CorridorPoint;
    /** Index of the edge owning the nearest centerline point. */
    edgeIndex: number;
}
/**
 * Organic corridor/path collision (#284.9): a distance-to-polyline width clamp over an edge graph —
 * cave tunnels, river channels, winding roads. Grid/navmesh/voxel collision can't express a smooth
 * ribbon; this can. Pure math over authored centerlines.
 */
export interface CorridorField {
    contains(x: number, z: number): boolean;
    /** Nearest-centerline sample, or `null` for an empty field. */
    nearest(x: number, z: number): CorridorSample | null;
    /** The input point when inside; otherwise the nearest point on the corridor boundary — the movement clamp. */
    clamp(x: number, z: number): CorridorPoint;
    /** Signed distance to the corridor edge: negative inside, positive outside. */
    distanceToBoundary(x: number, z: number): number;
}
export declare function createCorridorField(edges: readonly CorridorEdge[]): CorridorField;