import type { FluidDimension } from './kernels.cjs';
export type FluidReferenceVector = readonly [number, number, number?];
export type FluidReferenceMutableVector = [number, number, number];
export interface FluidReferenceDensityOptions {
    particleMass: number;
    smoothingRadius: number;
    dimension?: FluidDimension | undefined;
}
export interface FluidReferencePBFOptions extends FluidReferenceDensityOptions {
    restDensity: number;
    relaxation?: number | undefined;
    constraintMode?: 'compression-only' | 'symmetric' | undefined;
}
export interface FluidReferencePBFPositionOptions extends FluidReferencePBFOptions {
    artificialPressureStrength?: number | undefined;
    artificialPressureExponent?: number | undefined;
    artificialPressureDistance?: number | undefined;
}
export interface FluidReferencePBFVorticityOptions extends FluidReferenceDensityOptions {
    strength?: number | undefined;
    deltaTime?: number | undefined;
}
export interface FluidReferenceSPHPressureOptions {
    restDensity: number;
    equationOfState?: 'linear' | 'tait' | undefined;
    speedOfSound?: number | undefined;
    gamma?: number | undefined;
    pressureStiffness?: number | undefined;
    negativePressurePolicy?: 'clamp' | 'allow' | undefined;
    pressureFloor?: number | undefined;
}
export interface FluidReferenceSPHDiffusionOptions extends FluidReferenceDensityOptions {
    coefficient?: number | undefined;
}
export interface FluidReferenceSPHAccelerationOptions extends FluidReferenceDensityOptions {
    kinematicViscosity?: number | undefined;
}
export interface FluidStableTimeStepOptions {
    smoothingRadius?: number | undefined;
    speedOfSound?: number | undefined;
    maximumVelocity?: number | undefined;
    maximumAcceleration?: number | undefined;
    kinematicViscosity?: number | undefined;
}
export interface FluidReferenceBoxBoundaryOptions {
    dimensions?: FluidReferenceVector | undefined;
    particleRadius?: number | undefined;
    restitution?: number | undefined;
    friction?: number | undefined;
}
export interface FluidReferencePBFVorticityResult {
    vorticities: FluidReferenceMutableVector[];
    velocityDeltas: FluidReferenceMutableVector[];
}
export interface FluidReferenceSPHAccelerationResult {
    pressureAcceleration: FluidReferenceMutableVector[];
    viscosityAcceleration: FluidReferenceMutableVector[];
}
export interface FluidReferenceBoxBoundaryResult {
    position: FluidReferenceMutableVector;
    velocity: FluidReferenceMutableVector;
}
export declare function computeReferenceDensities(positions: readonly FluidReferenceVector[], { particleMass, smoothingRadius, dimension }: FluidReferenceDensityOptions): number[];
export declare function computeReferencePBFLambdas(positions: readonly FluidReferenceVector[], densities: readonly number[], options: FluidReferencePBFOptions): number[];
export declare function computeReferencePBFPositionDeltas(positions: readonly FluidReferenceVector[], lambdas: readonly number[], options: FluidReferencePBFPositionOptions): FluidReferenceMutableVector[];
export declare function computeReferencePBFVorticityConfinement(positions: readonly FluidReferenceVector[], velocities: readonly FluidReferenceVector[], densities: readonly number[], options: FluidReferencePBFVorticityOptions): FluidReferencePBFVorticityResult;
export declare function computeReferenceSPHPressures(densities: readonly number[], options: FluidReferenceSPHPressureOptions): number[];
export declare function computeReferenceSPHDensityDiffusion(positions: readonly FluidReferenceVector[], densities: readonly number[], options: FluidReferenceSPHDiffusionOptions): number[];
export declare function computeReferenceSPHAccelerations(positions: readonly FluidReferenceVector[], velocities: readonly FluidReferenceVector[], densities: readonly number[], pressures: readonly number[], options: FluidReferenceSPHAccelerationOptions): FluidReferenceSPHAccelerationResult;
export declare function estimateSPHStableTimeStep(options?: FluidStableTimeStepOptions): number;
export declare function applyReferenceBoxBoundary(position: FluidReferenceVector, velocity: FluidReferenceVector, options?: FluidReferenceBoxBoundaryOptions): FluidReferenceBoxBoundaryResult;