import { Mesh, Object3D, OrthographicCamera, PerspectiveCamera, Sprite, Vector3, Vector4, WebGLRenderer } from 'three';
import { LineSegments2 } from 'three/examples/jsm/lines/LineSegments2.js';
export type GizmoOrientation = '+x' | '-x' | '+y' | '-y' | '+z' | '-z';
export type DomPlacement = 'top-left' | 'top-right' | 'top-center' | 'center-right' | 'center-left' | 'center-center' | 'bottom-left' | 'bottom-right' | 'bottom-center';
/**
 * Extended ViewHelper implemented from the following source:
 * https://github.com/Fennec-hub/viewHelper
 * MIT License
 * Copyright (c) 2022 Fennec-hub
 */
export declare class ViewHelper2 extends Object3D {
    camera: OrthographicCamera | PerspectiveCamera;
    orthoCamera: OrthographicCamera;
    isViewHelper: boolean;
    animating: boolean;
    target: Vector3;
    backgroundSphere: Mesh;
    axesLines: LineSegments2;
    spritePoints: Sprite[];
    domElement: HTMLElement;
    domContainer: HTMLElement;
    domRect: DOMRect;
    renderer: WebGLRenderer;
    viewport: Vector4;
    offsetHeight: number;
    constructor(camera: PerspectiveCamera | OrthographicCamera, canvas: HTMLCanvasElement, placement?: DomPlacement, size?: number, pixelRatio?: number);
    startListening(): void;
    onPointerMove(e: PointerEvent): void;
    onPointerLeave(e: PointerEvent): void;
    handleClick(e: PointerEvent | MouseEvent): void;
    handleHover(e: PointerEvent): void;
    render(): void;
    updateOrientation(fromCamera?: boolean): void;
    update(): void;
    animate(delta: number): void;
    setOrientation(orientation: GizmoOrientation): void;
    dispose(): void;
}
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