import { BaseMaterial, Engine, ShaderProperty, Texture2D, Vector2, Vector3 } from "@galacean/engine";
export declare class WaterRippleMaterial extends BaseMaterial {
    private static _foamColor;
    private static _foamSpeed;
    private static _foamParam;
    private static _distorsionSpeed;
    private static _distorsionAmount;
    static _foamTextureProp: ShaderProperty;
    /**
     * Foam Texture Map
     */
    get foamTexture(): Texture2D;
    set foamTexture(value: Texture2D);
    /**
     * Normal Texture Map
     */
    get normalTexture(): Texture2D;
    set normalTexture(value: Texture2D);
    /**
     * Foam Color
     */
    get foamColor(): Vector3;
    set foamColor(val: Vector3);
    /**
     * Foam speed on x direction and y direction
     * foam speed y, foam amount, foam smoothness
     */
    get foamSpeed(): Vector2;
    set foamSpeed(val: Vector2);
    /**
     * Foam Param;
     * x for foam amount
     * y for foam smoothness, must between 0 ~ 0.5;
     */
    get foamParam(): Vector2;
    set foamParam(val: Vector2);
    /**
     * Distorsion Speed on x direction and y direction
     */
    get distorsionSpeed(): Vector2;
    set distorsionSpeed(val: Vector2);
    /**
     * Distorsion Amount, must between -1 ~ 1
     */
    get distorsionAmount(): number;
    set distorsionAmount(val: number);
    constructor(engine: Engine);
}