Class Vector2

2维向量或者坐标

Hierarchy

Vector2

Index

Constructors

Properties

Accessors

x y

Constructors

constructor

new Vector2(x?: number | Vector2 | [number, number] | [number, number, number], y?: number): Vector2
2维向量
Parameters
- Optional x: number | Vector2 | [number, number] | [number, number, number]
  
  x轴
- Optional y: number
  
  y轴
Returns Vector2
- Defined in lib/math/Vector2.ts:70

Properties

`Private` _x

_x: number = 0

`Private` _y

_y: number = 0

`Readonly` type

type: "Vector2" = 'Vector2'

Accessors

x

get x(): number
x轴坐标

Returns number
- Defined in lib/math/Vector2.ts:10
set x(value: number): void
设置x轴坐标
Parameters
- value: number
Returns void
- Defined in lib/math/Vector2.ts:16

y

get y(): number
y轴坐标

Returns number
- Defined in lib/math/Vector2.ts:22
set y(value: number): void
设置y轴坐标
Parameters
- value: number
Returns void
- Defined in lib/math/Vector2.ts:28

Methods

add

add(vec: Vector2): Vector2
向量相加

Returns
this
Parameters
- vec: Vector2
  
  向量
Returns Vector2
- Defined in lib/math/Vector2.ts:125

addValue

addValue(num: number): Vector2
x,y同时增加数值num

Returns
this
Parameters
- num: number
Returns Vector2
- Defined in lib/math/Vector2.ts:137

ceiling

ceiling(): Vector2
向上取整 Math.ceil

Returns
this

Returns Vector2
- Defined in lib/math/Vector2.ts:265

clone

clone(): Vector2
返回一个完全相同的新向量

Returns
new Vectors

Returns Vector2
- Defined in lib/math/Vector2.ts:116

copy

copy(vec: Vector2): Vector2
复制目标vec的x,y

Returns
this
Parameters
- vec: Vector2
  
  目标向量
Returns Vector2
- Defined in lib/math/Vector2.ts:106

cross

cross(vec: Vector2): number
向量叉乘 : x * vec.y - y * vec.x

Returns
返回向量叉乘值
Parameters
- vec: Vector2
  
  向量
Returns number
- Defined in lib/math/Vector2.ts:213

divide

divide(vec: Vector2): Vector2
向量相除

Returns
this
Parameters
- vec: Vector2
  
  向量
Returns Vector2
- Defined in lib/math/Vector2.ts:182

divideScalar

divideScalar(scalar: number): Vector2
向量除以缩放值

Returns
this
Parameters
- scalar: number
  
  缩放值
Returns Vector2
- Defined in lib/math/Vector2.ts:194

dot

dot(vec: Vector2): number
向量点乘 xvec.x+yvec.y

Returns
返回点乘标量值
Parameters
- vec: Vector2
  
  向量
Returns number
- Defined in lib/math/Vector2.ts:203

equals

equals(vec: Vector2): boolean
向量是否相同

Returns
是否相同
Parameters
- vec: Vector2
  
  向量
Returns boolean
- Defined in lib/math/Vector2.ts:300

length

length(): number
向量长度

Returns
向量长度值

Returns number
- Defined in lib/math/Vector2.ts:229

lengthSq

lengthSq(): number
向量长度的平方

Returns
xx+yy

Returns number
- Defined in lib/math/Vector2.ts:221

max

max(vec: Vector2): Vector2
坐标取最大值

Returns
this
Parameters
- vec: Vector2
  
  坐标
Returns Vector2
- Defined in lib/math/Vector2.ts:288

min

min(vec: Vector2): Vector2
两个坐标取小值

Returns
this
Parameters
- vec: Vector2
  
  坐标
Returns Vector2
- Defined in lib/math/Vector2.ts:277

multiply

multiply(vec: Vector2): Vector2
向量相乘

Returns
this
Parameters
- vec: Vector2
  
  向量
Returns Vector2
- Defined in lib/math/Vector2.ts:159

multiplyScalar

multiplyScalar(scalar: number): Vector2
向量缩放.x,y同时乘以scalar

Returns
this
Parameters
- scalar: number
  
  缩放值
Returns Vector2
- Defined in lib/math/Vector2.ts:170

normalize

normalize(): Vector2
归一化(length = 1)

Returns
归一化的向量方向

Returns Vector2
- Defined in lib/math/Vector2.ts:237

round

round(): Vector2
向量取整

Returns
this

Returns Vector2
- Defined in lib/math/Vector2.ts:245

set

set(x: number, y: number): Vector2
设置向量x,y坐标

Returns
this
Parameters
- x: number
  
  x轴坐标
- y: number
  
  y轴坐标
Returns Vector2
- Defined in lib/math/Vector2.ts:95

sub

sub(vec: Vector2): Vector2
向量相减

Returns
this
Parameters
- vec: Vector2
  
  向量
Returns Vector2
- Defined in lib/math/Vector2.ts:148

toArray

toArray(): [number, number]
坐标转数组 [x,y]

Returns
[x,y]

Returns [number, number]
- Defined in lib/math/Vector2.ts:308

toFixed

toFixed(decimal?: number): Vector2
向量四舍五入
Parameters
- decimal: number = 0
  
  保留小数位数
Returns Vector2
- Defined in lib/math/Vector2.ts:254

toString

toString(): string
转字符串

Returns
x,y

Returns string
- Defined in lib/math/Vector2.ts:316

`Static` addVectors

addVectors(vec1: Vector2, vec2: Vector2): Vector2
返回两个向量的叠加

Returns
返回vec = vec1+vec2
Parameters
- vec1: Vector2
  
  向量1
- vec2: Vector2
  
  向量2
Returns Vector2
- Defined in lib/math/Vector2.ts:38

`Static` parseFromArray

parseFromArray(array: number[]): Vector2
根据数组实例化坐标对象

Returns
vec(x,y)
Parameters
- array: number[]
  
  [x,y]
Returns Vector2
- Defined in lib/math/Vector2.ts:57

`Static` subVectors

subVectors(target: Vector2, vec: Vector2): Vector2
两个坐标相减

Returns
返回vec = target-vec
Parameters
- target: Vector2
  
  被减坐标
- vec: Vector2
  
  要减去的坐标
Returns Vector2
- Defined in lib/math/Vector2.ts:48

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