import { Matrix3 } from './Matrix3';
import { Tolerance } from './Tolerance';
import { Vector3 } from './Vector3';
declare class Vector2 {
    static fromObject(obj: {
        x: number;
        y: number;
    }): Vector2;
    readonly isVector2: boolean;
    x: number;
    y: number;
    constructor(x?: number, y?: number);
    get width(): number;
    set width(value: number);
    get height(): number;
    set height(value: number);
    set(x: number, y: number): this;
    setScalar(scalar: number): this;
    setX(x: number): this;
    setY(y: number): this;
    setComponent(index: number, value: number): this;
    getComponent(index: number): number;
    clone(): Vector2;
    copy(v: Vector2): this;
    add(v: Vector2): this;
    added(v: Vector2): Vector2;
    addScalar(s: number): this;
    addVectors(a: Vector2, b: Vector2): this;
    addScaledVector(v: Vector2, s: number): this;
    sub(v: Vector2): this;
    subtracted(v: Vector2): Vector2;
    subScalar(s: number): this;
    subVectors(a: Vector2, b: Vector2): this;
    reverse(): this;
    reversed(): Vector2;
    multiply(v: Vector2): this;
    /**
     * Return a new vector which is the scaler result of this vector.
     * @param scale
     */
    multiplied(scale: number): Vector2;
    multiplyScalar(scalar: number): this;
    divide(v: Vector2): this;
    divideScalar(scalar: number): this;
    applyMatrix3(m: Matrix3): this;
    min(v: Vector2): this;
    max(v: Vector2): this;
    clamp(min: Vector2, max: Vector2): this;
    clampScalar(minVal: number, maxVal: number): this;
    clampLength(min: number, max: number): this;
    floor(): this;
    ceil(): this;
    round(): this;
    roundToZero(): this;
    negate(): this;
    dot(v: Vector2): number;
    cross(v: Vector2): number;
    get lengthSq(): number;
    get length(): number;
    get manhattanLength(): number;
    normalize(): this;
    /**
     * The angle in [0, PI]
     */
    angle(v?: Vector2): number;
    /**
     * The angle in [0, 2PI)
     */
    angleTo(v: Vector2): number;
    /**
     * 返回单位向量
     */
    normalized(): Vector2;
    distanceTo(v: Vector2): number;
    distanceToSquared(v: Vector2): number;
    manhattanDistanceTo(v: Vector2): number;
    setLength(length: number): this;
    lerp(v: Vector2, alpha: number): this;
    lerpVectors(v1: Vector2, v2: Vector2, alpha: number): this;
    equals(v: Vector2, distTol?: number, cosTol?: number): boolean;
    isZero(distTol?: number): boolean;
    /**
     * 是否平行
     */
    isParallel(vec: Vector2, tol?: Tolerance, checkZeroVec?: boolean): boolean;
    /**
     * 是否垂直
     */
    isPerpendicular(vec: Vector2, tol?: Tolerance, checkZeroVec?: boolean): boolean;
    isSameDirection(v: Vector2, tol?: Tolerance, checkZeroVec?: boolean): boolean;
    isOpposite(vec: Vector2, tol?: Tolerance, checkZeroVec?: boolean): boolean;
    fromArray(array: number[] | ArrayLike<number>, offset?: number): this;
    toArray(array?: number[], offset?: number): number[];
    toVector3(): Vector3;
    rotateAround(center: Vector2, angle: number): this;
    random(): this;
}
export { Vector2 };