import { vec2 } from 'gl-matrix';
import { BodyInterface, ConstraintClamping, WorldInterface } from '../types';
import { ConstraintBase } from './constraint.base';
export declare class ContactConstraint extends ConstraintBase {
    readonly world: WorldInterface;
    readonly bodyA: Readonly<BodyInterface>;
    readonly bodyB: Readonly<BodyInterface>;
    readonly joint: vec2;
    readonly normal: vec2;
    penetration: number;
    constructor(world: WorldInterface, bodyA: Readonly<BodyInterface>, bodyB: Readonly<BodyInterface>, joint: vec2, normal: vec2, // normal at bodyA
    penetration: number);
    getJacobian(out: Float32Array): void;
    getPushFactor(dt: number, strength: number): number;
    getClamping(): ConstraintClamping;
    setPenetration(penetration: number): void;
    patch(point: vec2, penetration: number): void;
    private getCDot;
}