export declare type Point = [number, number];
export declare type Vector = Point;
export declare class Line {
    p: Point;
    v: Vector;
    l: number;
    constructor(p0: Point, p1: Point);
    set(p0: Point, p1: Point): void;
    toString(): string;
}
export declare class Ray extends Line {
    toString(): string;
}
export declare function create(x?: number, y?: number): Point;
export declare function clone(p: Point): Point;
export declare function copy(out: Point, a: Point): Point;
export declare function set(out: Point, x: number, y: number): Point;
export declare function min(out: Point, a: Point, b: Point): Point;
export declare function max(out: Point, a: Point, b: Point): Point;
export declare function negate(out: Point, p: Point): Point;
export declare function dot(v1: Point, v2: Point): number;
export declare function len(v: Point): number;
export declare function lenSquare(v: Point): number;
export declare function normalize(out: Point, v: Point): Point;
export declare function dist(p0: Point, p1: Point): number;
export declare function distSquare(p0: Point, p1: Point): number;
export declare function numberApproxEqual(a: number, b: number): boolean;
export declare function approxEqual(p0: Point, p1: Point): boolean;
export declare function equal(p0: Point, p1: Point): boolean;
export declare function scale(out: Point, v: Point, s: number): Point;
export declare function mul(out: Point, v1: Point, v2: Point): Point;
export declare function scaleAndAdd(out: Point, v1: Point, v2: Point, s: number): Point;
export declare function add(out: Point, v1: Point, v2: Point): Point;
export declare function sub(out: Point, v1: Point, v2: Point): Point;
export declare function cross(a: Point, b: Point): number;
export declare const LINE_TYPE_SEG: 0;
export declare const LINE_TYPE_RAY: 1;
export declare const LINE_TYPE_LINE: 2;
export declare type LINE_TYPES = typeof LINE_TYPE_RAY | typeof LINE_TYPE_SEG | typeof LINE_TYPE_LINE;
export declare function lineIntersection(out: Point, line1: Line, line2: Line, line1Type: LINE_TYPES, line2Type: LINE_TYPES): boolean;
export declare function pointToLineDistance(pt: Point, line: Line, lineType: LINE_TYPES): number;
export declare function area(points: Point[]): number;
export declare function triangleArea(p0: Point, p1: Point, p2: Point): number;