import { mat3, vec2, vec3 } from 'gl-matrix';
export declare const ORIGIN: Readonly<vec2>;
export declare const cross: (a: Readonly<vec2>, b: Readonly<vec2>) => number;
export declare const affineInverse: (out: mat3, m: Readonly<mat3>) => mat3;
export declare const areEqual: <T extends ArrayLike<number>>(a: T, b: T, epsilon: number) => boolean;
export declare const closestPointToLineSegment: (out: vec2, a: Readonly<vec2>, b: Readonly<vec2>, p: Readonly<vec2>) => vec2;
export declare const closestPointsBetweenLineSegments: (out0: vec2, out1: vec2, p0: Readonly<vec2>, p1: Readonly<vec2>, q0: Readonly<vec2>, q1: Readonly<vec2>) => void;
export declare const sqDistanceToLineSegment: (a: Readonly<vec2>, b: Readonly<vec2>, p: Readonly<vec2>) => number;
export declare const closestPointToTriangle: (out: vec3, a: Readonly<vec2>, b: Readonly<vec2>, c: Readonly<vec2>, p: Readonly<vec2>) => vec3;
export declare const fromBarycentric: <T extends ArrayLike<number>>(out: vec2, barycentric: T, ...points: Readonly<vec2>[]) => vec2;
export declare const isInsideTriangle: (barycentric: Readonly<vec2>) => boolean;
export declare const transformMat3Vec: (out: vec2, v: Readonly<vec2>, m: Readonly<mat3>) => vec2;
export declare const getPolygonSignedArea: (polygon: Readonly<vec2[]>) => number;
export declare const getPolygonCentroid: (polygon: Readonly<vec2[]>, area: number) => vec2;
export declare const clipByPlane: (p0: vec2, p1: Readonly<vec2>, normal: Readonly<vec2>, origin: Readonly<vec2>) => vec2;