import { vec2 } from 'gl-matrix';
import { BodyInterface, ConstraintClamping, WorldInterface } from '../types';
import { ConstraintBase } from './constraint.base';
export declare class SpringConstraint extends ConstraintBase {
    readonly world: WorldInterface;
    readonly bodyA: BodyInterface;
    readonly jointA: vec2;
    readonly bodyB: BodyInterface;
    readonly jointB: vec2;
    readonly length: number;
    readonly stiffness: number;
    readonly extinction: number;
    private readonly pa;
    private readonly pb;
    private readonly ra;
    private readonly rb;
    private readonly va;
    private readonly vb;
    private readonly pbpa;
    private readonly normal;
    constructor(world: WorldInterface, bodyA: BodyInterface, jointA: vec2, bodyB: BodyInterface, jointB: vec2, length: number, stiffness: number, extinction: number);
    getJacobian(out: Float32Array): void;
    getPushFactor(): number;
    getClamping(): ConstraintClamping;
}