import { Camera, WebGLRenderer, BoxGeometry, Color, Mesh, MeshBasicMaterial, Object3D, OrthographicCamera, Quaternion, Raycaster, Sprite, SpriteMaterial, Vector2, Vector3, Vector4 } from 'three';
declare class ViewHelperBase extends Object3D {
    camera: Camera;
    domElement: HTMLElement;
    orthoCamera: OrthographicCamera;
    isViewHelper: boolean;
    animating: boolean;
    center: Vector3;
    raycaster: Raycaster;
    mouse: Vector2;
    dummy: Object3D<import("three").Object3DEventMap>;
    interactiveObjects: Sprite[];
    point: Vector3;
    dim: number;
    turnRate: number;
    targetPosition: Vector3;
    targetQuaternion: Quaternion;
    q1: Quaternion;
    q2: Quaternion;
    viewport: Vector4;
    radius: number;
    geometry: BoxGeometry;
    xAxis: Mesh;
    yAxis: Mesh;
    zAxis: Mesh;
    posXAxisHelper: Sprite;
    posYAxisHelper: Sprite;
    posZAxisHelper: Sprite;
    negXAxisHelper: Sprite;
    negYAxisHelper: Sprite;
    negZAxisHelper: Sprite;
    constructor(camera: Camera, domElement: HTMLElement);
    render(renderer: WebGLRenderer): void;
    handleClick(event: MouseEvent): boolean;
    update(delta: number): void;
    dispose(): void;
    prepareAnimationData(object: Object3D, focusPoint: Vector3): void;
    getAxisMaterial(color: Color): MeshBasicMaterial;
    getSpriteMaterial(color: Color, text?: null | string): SpriteMaterial;
}
declare class ViewHelper extends ViewHelperBase {
    private el;
    dom: HTMLElement;
    constructor(editorCamera: Camera, el: HTMLElement);
    destroy(): void;
}
export { ViewHelper };