/**
 * ParticleTurbulence.ts
 *
 * Turbulence fields for particles: curl noise approximation,
 * vortex fields, time-varying strength, and frequency control.
 *
 * @module particles
 */
export interface TurbulenceConfig {
    strength: number;
    frequency: number;
    octaves: number;
    time: number;
}
interface TurbParticle {
    x: number;
    y: number;
    z: number;
    vx: number;
    vy: number;
    vz: number;
}
export declare class ParticleTurbulence {
    private config;
    constructor(config?: Partial<TurbulenceConfig>);
    setStrength(s: number): void;
    setFrequency(f: number): void;
    setTime(t: number): void;
    getConfig(): TurbulenceConfig;
    sampleCurl(x: number, y: number, z: number): {
        fx: number;
        fy: number;
        fz: number;
    };
    apply(particles: TurbParticle[], dt: number): void;
    tick(dt: number): void;
}
export {};
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