import { Vector3, IUniform, Light, SpotLight, DirectionalLight, HemisphereLight, PointLight } from 'three';
export interface WorldPosUniformElement {
    worldPos: Vector3;
}
export interface DirectionUniformElement {
    direction: Vector3;
}
export interface PenumbraUniformElement {
    penumbra: number;
}
export interface ShadowUniformElement {
    shadowBiasAngle: number;
    shadowBiasDistance: number;
}
interface UniformWithWorldPosArray extends Array<WorldPosUniformElement> {
    needsUpdate?: boolean;
}
export interface UniformsWithWorldPos extends IUniform {
    value: UniformWithWorldPosArray;
}
interface UniformWithDirectionArray extends Array<DirectionUniformElement> {
    needsUpdate?: boolean;
}
export interface UniformsWithDirection extends IUniform {
    value: UniformWithDirectionArray;
}
interface UniformWithPenumbraArray extends Array<PenumbraUniformElement> {
    needsUpdate?: boolean;
}
interface UniformWithShadowBiasArray extends Array<ShadowUniformElement> {
    needsUpdate?: boolean;
}
export interface UniformsWithPenumbra extends IUniform {
    value: UniformWithPenumbraArray;
}
export interface UniformsWithShadowBias extends IUniform {
    value: UniformWithShadowBiasArray;
}
export declare enum LightType {
    SPOT = 0,
    DIRECTIONAL = 1,
    HEMISPHERE = 2,
    POINT = 3
}
export declare function getLightType(object: Light): LightType | undefined;
export declare function updateUserDataPenumbra(object: SpotLight | PointLight | DirectionalLight, uniforms: UniformsWithPenumbra, index: number, defaultUniformCreate: () => PenumbraUniformElement): void;
export declare function updateUserDataShadowBias(object: SpotLight | PointLight | DirectionalLight, uniforms: UniformsWithShadowBias, index: number, defaultUniformCreate: () => ShadowUniformElement): void;
export type AvailableLight = SpotLight | DirectionalLight | HemisphereLight | PointLight;
export type UniformsUpdateFunction<L extends AvailableLight> = (object: L, uniforms: IUniform) => void;
export {};