export interface Vec2 {
    x: number;
    y: number;
}
export declare function vec2(x: number, y: number): Vec2;
export declare function add(a: Vec2, b: Vec2): Vec2;
export declare function sub(a: Vec2, b: Vec2): Vec2;
export declare function scale(v: Vec2, s: number): Vec2;
export declare function lerp(a: Vec2, b: Vec2, t: number): Vec2;
export declare function lerpN(a: number, b: number, t: number): number;
export declare function dot(a: Vec2, b: Vec2): number;
export declare function lenSq(v: Vec2): number;
export declare function len(v: Vec2): number;
export declare function distSq(a: Vec2, b: Vec2): number;
export declare function dist(a: Vec2, b: Vec2): number;
export declare function normalize(v: Vec2): Vec2;
/** Clockwise perpendicular: rotate 90° CW */
export declare function perpCW(v: Vec2): Vec2;
/** Counter-clockwise perpendicular: rotate 90° CCW */
export declare function perpCCW(v: Vec2): Vec2;
export declare function angle(v: Vec2): number;
/** Clamp a number between min and max */
export declare function clamp(v: number, min: number, max: number): number;
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