import * as THREE from 'three';
import { Helper } from '../Helper';
import { Entity } from '../Entity';
export interface FollowMotion {
    follower: Entity;
    guide: Entity;
    anchor?: string;
    followMatrix?: THREE.Matrix4;
}
export declare class FollowMotionHelper extends Helper<FollowMotion> {
    _followMatrixMap: Map<string, THREE.Matrix4>;
    constructor();
    onAdded(): Promise<void>;
    onRemoved(): void;
    initializeHandler(helperName: string): void;
    updateHandler(deltaTime: number, helperName: string): void;
    onDetach(helperName: string): void;
    updateFollowMatrix(helperName: string): void;
    getSnapshot(): {
        _t: string;
        _l: {
            helperName: string;
            follower: string;
            guide: string;
            anchor: string;
            followMatrixElements: number[];
        }[];
    };
}