import * as THREE from 'three';
import { PlaneGeometry } from 'three';
export type CausticsProjectionMaterialType = THREE.MeshNormalMaterial & {
    viewMatrix: {
        value?: THREE.Matrix4;
    };
    color?: THREE.Color;
    causticsTexture?: THREE.Texture;
    causticsTextureB?: THREE.Texture;
    lightProjMatrix?: THREE.Matrix4;
    lightViewMatrix?: THREE.Matrix4;
};
export type CausticsProps = {
    frames?: number;
    causticsOnly?: boolean;
    backside?: boolean;
    ior?: number;
    backsideIOR?: number;
    worldRadius?: number;
    intensity?: number;
    color?: THREE.Color;
    resolution?: number;
    lightSource?: THREE.Vector3 | THREE.Object3D;
    near?: number;
    far?: number;
};
export type CausticsProjectionShaderType = {
    causticsTexture?: THREE.Texture | null;
    causticsTextureB?: THREE.Texture | null;
    color?: THREE.Color;
    lightProjMatrix?: THREE.Matrix4;
    lightViewMatrix?: THREE.Matrix4;
};
export declare const CausticsProjectionMaterial: (new (parameters?: (THREE.ShaderMaterialParameters & Partial<CausticsProjectionShaderType>) | undefined) => THREE.ShaderMaterial & CausticsProjectionShaderType) & {
    key: string;
};
export type CausticsMaterialType = {
    cameraMatrixWorld: THREE.Matrix4;
    cameraProjectionMatrixInv: THREE.Matrix4;
    normalTexture: THREE.Texture | null;
    depthTexture: THREE.Texture | null;
    lightDir: THREE.Vector3;
    lightPlaneNormal: THREE.Vector3;
    lightPlaneConstant: number;
    near: number;
    far: number;
    modelMatrix: THREE.Matrix4;
    worldRadius: number;
    ior: number;
    bounces: number;
    resolution: number;
    size: number;
    intensity: number;
};
export declare const CausticsMaterial: (new (parameters?: (THREE.ShaderMaterialParameters & Partial<CausticsMaterialType>) | undefined) => THREE.ShaderMaterial & CausticsMaterialType) & {
    key: string;
};
export type CausticsType = {
    scene: THREE.Scene;
    group: THREE.Group;
    helper: THREE.CameraHelper;
    params: CausticsProps;
    update: () => void;
    normalTarget: THREE.WebGLRenderTarget;
    normalTargetB: THREE.WebGLRenderTarget;
    causticsTarget: THREE.WebGLRenderTarget;
    causticsTargetB: THREE.WebGLRenderTarget;
};
export declare function createCausticsUpdate(updateParameters: () => {
    params: Omit<CausticsProps, 'color'>;
    scene: THREE.Scene;
    group: THREE.Group;
    camera: THREE.OrthographicCamera;
    plane: THREE.Mesh<PlaneGeometry, InstanceType<typeof CausticsProjectionMaterial>>;
    normalTarget: THREE.WebGLRenderTarget;
    normalTargetB: THREE.WebGLRenderTarget;
    causticsTarget: THREE.WebGLRenderTarget;
    causticsTargetB: THREE.WebGLRenderTarget;
    helper?: THREE.CameraHelper | null;
}): (gl: THREE.WebGLRenderer) => void;
export declare const Caustics: (renderer: THREE.WebGLRenderer, { frames, causticsOnly, ior, backside, backsideIOR, worldRadius, color, intensity, resolution, lightSource, near, far, }?: CausticsProps) => CausticsType;