export interface FluidArtificialPressureOptions {
    strength?: number | undefined;
    exponent?: number | undefined;
}
export interface FluidPBFMaterialOptions {
    xsphViscosity?: number | undefined;
    vorticityConfinement?: number | undefined;
    artificialPressure?: FluidArtificialPressureOptions | undefined;
    readonly [name: string]: unknown;
}
export interface FluidSPHMaterialOptions {
    equationOfState?: 'linear' | 'tait' | undefined;
    speedOfSound?: number | undefined;
    gamma?: number | undefined;
    kinematicViscosity?: number | undefined;
    densityDiffusion?: number | undefined;
    surfaceTension?: number | undefined;
    readonly [name: string]: unknown;
}
export interface FluidMaterialOptions {
    restDensity?: number;
    viscosity?: number;
    surfaceTension?: number;
    rendering?: Readonly<Record<string, unknown>>;
    pbf?: FluidPBFMaterialOptions;
    sph?: FluidSPHMaterialOptions;
    readonly [name: string]: unknown;
}
export interface FluidMaterial extends FluidMaterialOptions {
    restDensity: number;
    viscosity: number;
    surfaceTension: number;
    rendering: Readonly<Record<string, unknown>>;
    pbf: FluidPBFMaterialOptions;
    sph: FluidSPHMaterialOptions;
}
export interface FluidMaterialPresets {
    water(overrides?: FluidMaterialOptions): FluidMaterial;
    viscousLiquid(overrides?: FluidMaterialOptions): FluidMaterial;
    gelLike(overrides?: FluidMaterialOptions): FluidMaterial;
    custom(options?: FluidMaterialOptions): FluidMaterial;
}
/** Inspectable material-preset helpers for particle-fluid solvers. */
export declare const FluidMaterials: Readonly<FluidMaterialPresets>;