import { Object3D } from 'three';
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls';
import * as THREE from 'three';
type ViewHelperPlacement = 'top-left' | 'top-right' | 'bottom-left' | 'bottom-right' | 'center-left' | 'center-right';
export declare class ViewHelper extends Object3D {
    private camera;
    private renderer;
    private placement;
    private size;
    private domElement;
    private orthoCamera;
    private isViewHelper;
    animating: boolean;
    private target;
    private viewport;
    private offsetHeight;
    private axesLines;
    private spritePoints;
    private domContainer;
    private domRect;
    private controlsChangeEvent;
    private controls;
    altPressed: boolean;
    private currentOrientation;
    private middleMousePressed;
    private lastMousePosition;
    private directionSet;
    constructor(camera: THREE.Camera, renderer: THREE.WebGLRenderer, placement?: ViewHelperPlacement, size?: number, element?: HTMLElement);
    private onMouseMove;
    setEnabled(enabled: boolean): void;
    private hide;
    private show;
    private startListening;
    private onPointerDown;
    private onPointerMove;
    private onPointerLeave;
    private handleClick;
    private handleHover;
    setControls(controls: OrbitControls | null): void;
    render(): void;
    private updateOrientation;
    update(): void;
    private animate;
    setOrientation(orientation: '+x' | '+y' | '+z' | '-x' | '-y' | '-z'): void;
    dispose(): void;
    getNextRight(): "+x" | "+z" | "-x" | "-z";
    getNextLeft(): "+x" | "+z" | "-x" | "-z";
    getNextUp(): "+y" | "+z";
    getNextDown(): "+z" | "-y";
}
export {};