/**
 * Fluid Trait
 *
 * Fluid dynamics simulation using MLS-MPM (GPU) or SPH (CPU fallback).
 * Supports splash effects, viscosity, and screen-space fluid rendering (SSFR).
 *
 * GPU backend: MLS-MPM via WebGPU compute shaders (100K+ particles)
 * CPU fallback: SPH via FluidSim.ts (~500 particles)
 *
 * Reads wind from @weather blackboard when present.
 *
 * @version 3.0.0
 */
import type { TraitHandler } from '@holoscript/core';
type SimulationMethod = 'mls_mpm' | 'sph' | 'flip' | 'pic' | 'pbf';
type RenderMode = 'ssfr' | 'particles' | 'mesh' | 'marching_cubes' | 'splatting';
interface FluidConfig {
    method: SimulationMethod;
    particle_count: number;
    viscosity: number;
    surface_tension: number;
    density: number;
    gravity: [number, number, number];
    render_mode: RenderMode;
    kernel_radius: number;
    time_step: number;
    collision_damping: number;
    rest_density: number;
    /** MLS-MPM grid resolution (default: 128) */
    grid_resolution: number;
    /** SSFR render resolution scale (default: 0.5 = half-res) */
    resolution_scale: number;
    /** MLS-MPM bulk modulus / compressibility (default: 50) */
    bulk_modulus: number;
    /** Domain size in world units (default: 10) */
    domain_size: number;
    /** How much @weather wind affects fluid surface (default: 1.0) */
    wind_sensitivity: number;
    /** SSFR absorption color [R, G, B] */
    absorption_color: [number, number, number];
    /** SSFR absorption strength */
    absorption_strength: number;
}
export declare const fluidHandler: TraitHandler<FluidConfig>;
export default fluidHandler;
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