import * as THREE from 'three';
import type { IOutlineHelperConstructorOption } from './types';
export declare class OutlineHelper {
    private object?;
    private container;
    private scene;
    private camera;
    private quad;
    private maskBuffer;
    private edgeBuffer;
    private maskMaterial;
    private edgeMaterial;
    private copyMaterial;
    private oldClearColor;
    constructor(options: IOutlineHelperConstructorOption);
    objectSelected(obj: THREE.Object3D): void;
    unSelect(): void;
    private hideObjects;
    render(): void;
    private hideNonSelectedObjects;
    private showNonSelectedObjects;
}