import type { LineSegments, OrbitControls, PerspectiveCamera, Sprite, WebGLRenderer, lib } from 'thunder-3d';
import { Mesh, Object3D, OrthographicCamera, Vector3, Vector4 } from 'thunder-3d';
declare type GizmoOrientation = '+x' | '-x' | '+y' | '-y' | '+z' | '-z';
export declare type DomPlacement = 'top-left' | 'top-right' | 'top-center' | 'center-right' | 'center-left' | 'center-center' | 'bottom-left' | 'bottom-right' | 'bottom-center';
declare class ViewHelper extends Object3D {
    camera: OrthographicCamera | PerspectiveCamera;
    orthoCamera: OrthographicCamera;
    isViewHelper: boolean;
    animating: boolean;
    target: Vector3;
    backgroundSphere: Mesh;
    axesLines: LineSegments;
    spritePoints: Sprite[];
    domElement: HTMLElement;
    domContainer: HTMLElement;
    domRect: DOMRect;
    dragging: boolean;
    renderer: WebGLRenderer;
    controls?: OrbitControls | lib.TrackballControls;
    controlsChangeEvent: {
        listener: () => void;
    };
    viewport: Vector4;
    offsetHeight: number;
    constructor(camera: PerspectiveCamera | OrthographicCamera, renderer: WebGLRenderer, placement?: DomPlacement, size?: number);
    startListening(): void;
    onPointerDown(e: PointerEvent): void;
    onPointerMove(e: PointerEvent): void;
    onPointerLeave(): void;
    handleClick(e: PointerEvent): void;
    handleHover(e: PointerEvent): void;
    setControls(controls?: OrbitControls | lib.TrackballControls): void;
    render(): void;
    updateOrientation(fromCamera?: boolean): void;
    update(): void;
    animate(delta: number): void;
    setOrientation(orientation: GizmoOrientation): void;
    dispose(): void;
}
export default ViewHelper;