import { Vector3, Matrix4 } from "three";
export declare const AREA_LIGHT = 0;
export declare const SKY_LIGHT = 1;
export declare class Light {
    mTheta: number;
    mPhi: number;
    mWidth: number;
    mHeight: number;
    mDistance: number;
    mSkyRadius: number;
    mP: Vector3;
    mTarget: Vector3;
    mArea: number;
    mColor: Vector3;
    mColorTop: Vector3;
    mColorMiddle: Vector3;
    mColorBottom: Vector3;
    mT: number;
    mN: Vector3;
    mU: Vector3;
    mV: Vector3;
    mHalfWidth: number;
    mHalfHeight: number;
    private mAreaPdf;
    constructor(type: number);
    update(targetPoint: Vector3, cameraMatrix?: Matrix4): void;
}