import { Vector3, DirectionalLight, Object3D, Material, PerspectiveCamera, OrthographicCamera, Color } from 'three';
import CSMHelper from './CSMHelper';
import CSMFrustum from './CSMFrustum';
export declare type CustomSplitsCallbackType = (cascadeCount: number, nearDistance: number, farDistance: number) => number[];
export interface CSMParams {
    camera: PerspectiveCamera | OrthographicCamera;
    parent: Object3D;
    cascades?: number;
    maxCascades?: number;
    maxFar?: number;
    mode?: 'uniform' | 'logarithmic' | 'practical' | 'custom';
    practicalModeLambda?: number;
    customSplitsCallback?: CustomSplitsCallbackType;
    shadowMapSize?: number;
    shadowBias?: number;
    shadowNormalBias?: number;
    lightIntensity?: number;
    lightColor?: Color;
    lightDirection?: Vector3;
    lightDirectionUp?: Vector3;
    lightMargin?: number;
    fade?: boolean;
    noLastCascadeCutOff?: boolean;
}
declare class CSM {
    camera: PerspectiveCamera | OrthographicCamera;
    parent: Object3D;
    cascades: number;
    maxCascades: number;
    maxFar: number;
    mode: string;
    practicalModeLambda: number;
    shadowMapSize: number;
    shadowBias: number;
    shadowNormalBias: number;
    lightDirection: Vector3;
    lightDirectionUp: Vector3;
    lightIntensity: number;
    lightColor: Color;
    lightMargin: number;
    customSplitsCallback: CustomSplitsCallbackType;
    fade: boolean;
    noLastCascadeCutOff: boolean;
    mainFrustum: CSMFrustum;
    frustums: CSMFrustum[];
    breaks: number[];
    lights: DirectionalLight[];
    private readonly shaders;
    constructor(data: CSMParams);
    private createLights;
    private initCascades;
    private updateShadowBounds;
    private updateBreaks;
    update(): void;
    private injectInclude;
    setupMaterial(material: Material): void;
    private updateUniforms;
    private getExtendedBreaks;
    updateFrustums(): void;
    updateCascades(cascades: number): void;
    updateShadowMapSize(size: number): void;
    dispose(): void;
    static Helper: typeof CSMHelper;
}
export default CSM;