import { BaseMaterial, Engine, ShaderProperty, Texture2D, Vector2, Vector4 } from "@galacean/engine";
export declare class WaterFallMaterial extends BaseMaterial {
    private static _waterSpeed;
    private static _waterfallSpeed;
    private static _distorsionSpeed;
    private static _edgeColor;
    private static _edgeParam;
    private static _distorsionAmount;
    static _waterTextureProp: ShaderProperty;
    static _waterfallTextureProp: ShaderProperty;
    static _edgeTextureProp: ShaderProperty;
    /**
     *  Normal Texture Map
     */
    get normalTexture(): Texture2D;
    set normalTexture(value: Texture2D);
    /**
     *  Water Texture Map
     */
    get waterTexture(): Texture2D;
    set waterTexture(value: Texture2D);
    /**
     *  Water Fall Texture Map
     */
    get waterfallTexture(): Texture2D;
    set waterfallTexture(value: Texture2D);
    /**
     *  Edge Noise Texture Map
     */
    get edgeNoiseTexture(): Texture2D;
    set edgeNoiseTexture(value: Texture2D);
    /**
     *  Water Speed on x direction and y direction
     */
    get waterSpeed(): Vector2;
    set waterSpeed(val: Vector2);
    /**
     *  Water Speed on x direction and y direction
     */
    get waterfallSpeed(): Vector2;
    set waterfallSpeed(val: Vector2);
    /**
     * Water Edge Color
     */
    get edgeColor(): Vector4;
    set edgeColor(val: Vector4);
    /**
     * Edge Param;
     * x for edge thickness, must between 0 ~ 1;
     * y for edge smoothness, must between 0 ~ 0.5;
     */
    get edgeParam(): Vector2;
    set edgeParam(val: Vector2);
    /**
     * Distorsion Amount, must between -1 ~ 1
     */
    get distorsionAmount(): number;
    set distorsionAmount(val: number);
    /**
     * Distorsion Speed on x direction and y direction
     */
    get distorsionSpeed(): Vector2;
    set distorsionSpeed(val: Vector2);
    constructor(engine: Engine);
}