import * as THREE from 'three';
import { ContextManager, Event, Observable } from '@zcomponent/core';
import { Object3D } from '../../../components/Object3D';
export declare class Curve3EndHelper extends Object3D {
    onAddSegment: Event<[]>;
    element: THREE.Group;
    private _button;
    private _lineGeometry;
    private _lineMaterial;
    private _line;
    constructor(contextManager: ContextManager, constructorProps: {});
    private _updateSVGColors;
    color: Observable<`#${string}`, never>;
    private _update;
    positions: Observable<[x: number, y: number, z: number, tx: number, ty: number, tz: number], never>;
    private _calculateFactorForWorldPosition;
    dispose(): never;
}