import type { Vector3 } from '@holoscript/core';
/**
 * ParticleAttractor.ts
 *
 * Point/line/plane attractors for particle systems:
 * inverse-square falloff, orbital motion, and kill radius.
 *
 * @module particles
 */
export type AttractorShape = 'point' | 'line' | 'plane';
export interface Attractor {
    id: string;
    shape: AttractorShape;
    position: [number, number, number];
    direction: Vector3;
    strength: number;
    radius: number;
    killRadius: number;
    orbit: boolean;
}
export interface Particle {
    x: number;
    y: number;
    z: number;
    vx: number;
    vy: number;
    vz: number;
    alive: boolean;
    [index: number]: number | boolean;
}
export declare class ParticleAttractorSystem {
    private attractors;
    addAttractor(a: Attractor): void;
    removeAttractor(id: string): void;
    apply(particles: Particle[], dt: number): void;
    getAttractorCount(): number;
}
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