Class Vector2

2D Vector

Hierarchy

Vector2

Index

Constructors

constructor

Properties

Methods

Constructors

constructor

new Vector2(): Vector2
new Vector2(x: number, y: number): Vector2

Returns Vector2
Parameters
- x: number
- y: number
Returns Vector2

Properties

x

x: number

y

y: number

Static One

One: Vector2 = new Vector2(1, 1)

Static UnitX

UnitX: Vector2 = new Vector2(1, 0)

Static UnitY

UnitY: Vector2 = new Vector2(0, 1)

Static Zero

Zero: Vector2 = new Vector2(0, 0)

Methods

_angle

_angle(v: Vector2): number

Parameters
- v: Vector2
Returns number

abs

abs(): this

Sets each component of this tuple to its absolute value.

Returns this

add

add(v: Vector2): this

Parameters
- v: Vector2
Returns this

angle

angle(v?: Vector2): number

Returns the angle in radians between this vector and an vector or X-axis. The return value is constrained to the range [0,PI].

throws

{RangeError} when v is zero vector

Parameters
- Optional v: Vector2
Returns number

clone

clone(): Vector2

Returns Vector2

div

div(n: number): this

Parameters
- n: number
Returns this

dot

dot(v: Vector2): number

Computes the dot product of this vector and vector v.

Parameters
- v: Vector2
Returns number

equals

equals(v: Vector2): boolean

Parameters
- v: Vector2
Returns boolean

getNormL

getNormL(): Vector2

Returns left normal vector. 返回的左法向量。

Returns Vector2

getNormR

getNormR(): Vector2

Returns right normal vector. 返回的右法向量。

Returns Vector2

getProject

getProject(v: Vector2): Vector2

Returns a new vector which is V1 projection on V2.
返回当前向量在向量V上的投影向量。

Parameters
- v: Vector2
Returns Vector2

getReboundL

getReboundL(v: Vector2): Vector2

Returns the rebound vector when this vector move to vector v from left side. 返回从左边碰撞V后的反弹向量。

Parameters
- v: Vector2
Returns Vector2

getReboundR

getReboundR(v: Vector2): Vector2

Returns the rebound vector when this vector move to vector v from right side. 返回从左边碰撞V后的反弹向量。

Parameters
- v: Vector2
Returns Vector2

isZero

isZero(): boolean

Returns boolean

length

length(): number

Returns the length of this vector.

Returns number

lengthSq

lengthSq(): number

Returns the squared length of this vector.

Returns number

mul

mul(n: number): this

Parameters
- n: number
Returns this

negate

negate(): this

Negates this vector.

Returns this

normalize

normalize(): this

Sets the 1 length vector of this vector.
设置成长度为1的单位向量。

Returns this

parallelTo

parallelTo(v: Vector2): boolean

Judge this vector is parallel to vector v.
是否平行于向量v。

Parameters
- v: Vector2
Returns boolean

radian

radian(): number

Returns the radians of this vector.

Returns number

set

set(v: Vector2): this
set(from: ArrayPoint2, to: ArrayPoint2): this
set(from: Point2, to: Point2): this

Parameters
- v: Vector2
Returns this
Parameters
- from: ArrayPoint2
- to: ArrayPoint2
Returns this
Parameters
- from: Point2
- to: Point2
Returns this

sub

sub(v: Vector2): this

Parameters
- v: Vector2
Returns this

toArray

toArray(): [number, number]

Returns [number, number]

toString

toString(): string

Returns string

verticalTo

verticalTo(v: Vector2): boolean

Judge this vector is perpendicular to vector v.
是否垂直于向量v。

Parameters
- v: Vector2
Returns boolean

Static cross

cross(v1: Vector2, v2: Vector2): number

Returns cross product value of vectors v1 and v2.

Parameters
- v1: Vector2
- v2: Vector2
Returns number

Static lerp

lerp(from: Vector2, to: Vector2, amount: number): Vector2

Return an vector of linear interpolation.
返回新的线性插值向量。 amount: 一个介于 0 与 1 之间的值，指示 the "to" vector 的权重。

throws

{RangeError} when amount is not in [0,1]

Parameters
- from: Vector2
- to: Vector2
- amount: number
Returns Vector2

Static toVector

toVector(p1: ArrayPoint2, p2: ArrayPoint2): Vector2
toVector(p1: Point2, p2: Point2): Vector2
toVector(line: Segment): Vector2

Parameters
- p1: ArrayPoint2
- p2: ArrayPoint2
Returns Vector2
Parameters
- p1: Point2
- p2: Point2
Returns Vector2
Parameters
- line: Segment
Returns Vector2

Static whichSide

whichSide(p1: ArrayPoint2, p2: ArrayPoint2, p: ArrayPoint2): number

The point p on which side of an vector(p1->p2). 判断点在直线的哪一边

Parameters
- p1: ArrayPoint2
- p2: ArrayPoint2
- p: ArrayPoint2
Returns number

-1 is LEFT; 1 is RIGHT; 0 is COLLINEAR;