import { Mesh, Object3D } from 'three';
import type { SpotLightContainer } from '../SpotLight';
export interface CoreSpotLightHelperParams {
    helperSize: number;
}
export interface UpdateSpotLightConeObjectOptions {
    distance: number;
    sizeMult: number;
    angle: number;
}
export declare class CoreSpotLightHelper {
    container: SpotLightContainer;
    object: Mesh;
    private _cone;
    private _lineMaterial;
    constructor(container: SpotLightContainer);
    createAndBuildObject(params: CoreSpotLightHelperParams): void;
    buildHelper(): void;
    update(params: CoreSpotLightHelperParams): void;
    private static _matrixScale;
    static transformObject(object: Object3D, options: UpdateSpotLightConeObjectOptions): void;
    private static _buildConeGeometry;
}