export function b2CalculateParticleIterations(gravity: any, radius: any, timeStep: any): number;
/**
 * The particle type. Can be combined with the | operator.
 */
export const b2ParticleFlag: any;
export class b2ParticleDef {
    flags: number;
    position: b2Vec2;
    velocity: b2Vec2;
    color: b2Color;
    lifetime: number;
    userData: any;
    group: any;
}
export class b2ParticleHandle {
    m_index: number;
    GetIndex(): number;
    SetIndex(index: any): void;
}
import { b2Vec2 } from "../common/b2_math.js";
import { b2Color } from "../common/b2_draw.js";