import * as THREE from 'three';
import { ContextManager, Event, Observable } from '@zcomponent/core';
import { Object3D } from '../../../components/Object3D';
import { Curve3EndHelper } from './Curve3EndHelper';
import { Curve3LineHelper } from './Curve3LineHelper';
import { Curve3 } from '../../../components/curves/Curve3';
interface Curve3HelperProps {
    node: Curve3;
}
export declare class Curve3Helper extends Object3D {
    constructorProps: Curve3HelperProps;
    element: THREE.Group;
    edit: Observable<boolean, never>;
    canExtendStart: Observable<boolean, never>;
    canExtendEnd: Observable<boolean, never>;
    canInsert: Observable<boolean, never>;
    editColor: Observable<`#${string}`, never>;
    color: Observable<`#${string}`, never>;
    thickness: Observable<number, never>;
    editThickness: Observable<number, never>;
    protected _onUpdateStructure: Event<[]>;
    protected _line: Curve3LineHelper;
    protected _startEndHelper: Curve3EndHelper | undefined;
    protected _endEndHelper: Curve3EndHelper | undefined;
    protected _curveVersion: number;
    protected _pointersEntered: number;
    constructor(contextManager: ContextManager, constructorProps: Curve3HelperProps);
    private _updateStructure;
    protected _updateFrame(): void;
    createNewPointAtPosition: ((t: number, position: [x: number, y: number, z: number]) => void) | undefined;
    protected _calculateFactorForWorldPosition(position: THREE.Vector3): number;
    private _createStartSegment;
    private _createEndSegment;
    private _createMiddleSegment;
    private _proposePoint;
    dispose(): never;
}
export {};