import type * as THREE from "three";
import type { ThreeParts } from "../realistic/textures.ts";
import type { GeoPoint } from "../types.ts";
export interface RouteStats {
    on: boolean;
    kilometres: number;
    greatCircleKm: number;
    flightHours: number;
}
export interface RouteState {
    ends: {
        from: GeoPoint;
        to: GeoPoint;
    } | null;
    version: number;
    failed: boolean;
    stats: RouteStats;
}
export declare const newRouteState: () => RouteState;
/** Put a route on the model. Returns false when it did not change, so the element does not ask for a frame. */
export declare function applyRoute(state: RouteState, ends: {
    from: GeoPoint;
    to: GeoPoint;
} | null): boolean;
export interface RouteLayer {
    sync(): void;
    dispose(): void;
}
/**
 * The route under `parent` (the group that turns with the Earth). Needs `LineSegments`, as the grid does.
 */
export declare function createRouteLayer(three: ThreeParts, parent: THREE.Object3D, state: RouteState): RouteLayer;