import { vec2 } from 'gl-matrix';
import { BodyInterface, WorldInterface, JointInterface, ConstraintInterface } from '../types';
export interface SpringDef {
    bodyA: Readonly<BodyInterface>;
    pivotA?: Readonly<vec2>;
    bodyB: Readonly<BodyInterface>;
    pivotB?: Readonly<vec2>;
    distance: number;
    stiffness?: number;
    extinction?: number;
}
export declare class SpringJoint implements JointInterface {
    readonly world: WorldInterface;
    readonly bodyA: Readonly<BodyInterface>;
    readonly pivotA: Readonly<vec2>;
    readonly bodyB: Readonly<BodyInterface>;
    readonly pivotB: Readonly<vec2>;
    readonly distance: number;
    readonly stiffness: number;
    readonly extinction: number;
    private readonly springConstraint;
    constructor(world: WorldInterface, bodyA: Readonly<BodyInterface>, pivotA: Readonly<vec2>, bodyB: Readonly<BodyInterface>, pivotB: Readonly<vec2>, distance: number, stiffness: number, extinction: number);
    [Symbol.iterator](): Iterator<ConstraintInterface>;
}