import * as THREE from 'three';
export declare class CameraViewportRenderer {
    private helpersGroup;
    private readonly size;
    private viewport;
    private camera;
    private readonly padding;
    constructor(helpersGroup: THREE.Group, size?: number);
    private calculateAspectRatio;
    setCamera(camera: THREE.Camera | null): void;
    render(scene: THREE.Scene, renderer: THREE.WebGLRenderer): void;
    private calculateAndSetViewport;
    private renderScene;
}