import { type Behavior, type Particle, type ParticleSystem } from "three.quarks";
import { SubEmitterType } from "./ParticleSystem.js";
import type { IParticleSystem } from "./ParticleSystemModules.js";
export declare class ParticleSubEmitter implements Behavior {
    private system;
    private particleSystem;
    private subSystem;
    subParticleSystem?: ParticleSystem | undefined;
    type: string;
    emitterType?: SubEmitterType;
    emitterProbability?: number;
    private q_;
    private v_;
    private v2_;
    private _emitterMatrix;
    private _circularBuffer;
    constructor(system: IParticleSystem, particleSystem: ParticleSystem, subSystem: IParticleSystem, subParticleSystem?: ParticleSystem | undefined);
    clone(): Behavior;
    initialize(particle: Particle): void;
    update(particle: Particle, _delta: number): void;
    frameUpdate(_delta: number): void;
    toJSON(): any;
    reset(): void;
    private run;
}