import { Settings } from '../../settings';
import { Memory } from '../../utils';
import { Body } from '../body';
import { JointInterface, ConstraintsSolverInterface } from '../types';
export declare class WorldIsland {
    private readonly settings;
    private readonly solver;
    private readonly memory;
    private readonly bodies;
    private readonly constraints;
    private readonly stack;
    private id;
    private positions;
    private velocities;
    private forces;
    private invMasses;
    private accelerations;
    private _sleeping;
    private readonly bodyPosition;
    private readonly bodyVelocity;
    constructor(settings: Settings, solver: ConstraintsSolverInterface, memory: Memory);
    get sleeping(): boolean;
    get empty(): boolean;
    setId(id: number): void;
    addBody(body: Body): void;
    addJoint(joint: JointInterface): void;
    clear(): void;
    step(dt: number): void;
    private solve;
    private integrate;
    private serializeBodies;
    private arraysToBodies;
}