import { mat3, vec2 } from 'gl-matrix';
import { AABB } from '../aabb';
import { Shape, MassDistribution } from '../types';
export declare class Circle implements Shape, MassDistribution {
    readonly radius: number;
    constructor(radius: number);
    support(out: vec2, dir: vec2, margin?: number): vec2;
    aabb(out: AABB, transform: mat3): AABB;
    testPoint(point: vec2): boolean;
    inetria(mass: number): number;
}