import * as THREE from 'three';
import { ContextManager, Observable } from '@zcomponent/core';
import { Curve3 } from './Curve3';
/**
 * A curve with straight line segments between points.
 *
 * Add Point nodes as children to define the points the curve passes through.
 *
 * This node represents the curve as a logical path. To show a visible line in the scene, use the Line2 component.
 *
 * @zcomponent
 * @zgroup Curves
 * @ztag three/Curve3/LineCurve3
 * @ztag three/PointHost/LineCurve3
 * @zparents three/CurveHost/**
 * @zparents three/Object3D/Group/**
 * @zicon polyline
 * @zdefaultchild "Point 0" "@zcomponent/three/lib/components/Point#Point" position="[0, 0, 0]"
 * @zdefaultchild "Point 1" "@zcomponent/three/lib/components/Point#Point" position="[1, 1, 0]"
 * @zdefaultchild "Point 2" "@zcomponent/three/lib/components/Point#Point" position="[1, 1, 1]"
 */
export declare class LineCurve3 extends Curve3 {
    curve: THREE.CurvePath<THREE.Vector3> | undefined;
    element: THREE.Group;
    private _helper;
    private _generatedClosed;
    private _generatedPoints;
    constructor(contextManager: ContextManager, constructorProps: {});
    updateCurve: () => boolean;
    private _updateHelpers;
    private _cleanUpHelpers;
    /**
     * @zprop
     * @zgroup LineCurve3
     * @zgrouppriority 20
     * @zdefault false
     */
    closed: Observable<boolean, never>;
    dispose(): never;
}