Arc | Math Library

表示二维世界的圆弧

Class representing an arc in Two-dimensional coordinate system

Hierarchy

Arc

Index

Constructors

constructor

Properties

Accessors

Methods

Constructors

constructor

new Arc(center?: Vector2, radius?: number, startRadian?: number, endRadian?: number, isClockwise?: boolean): Arc

- Defined in unit/arc/index.ts:85
Parameters
- Optional center: Vector2
  
  圆心
- Optional radius: number
  
  半径
- Optional startRadian: number
  
  起始角
- Optional endRadian: number
  
  终止角
- isClockwise: boolean = ...
  
  是否是逆时针
Returns Arc

Properties

center

center: Vector2 = ...

圆心

default: Vector2(0, 0)

endRadian

endRadian: number = ...

终止角（弧度制）

default: 0

isClockwise

isClockwise: boolean = ...

是否顺时针（默认：false）

default: false

radius

radius: number = ...

半径

default: 0

startRadian

startRadian: number = ...

起始角（弧度制）

default: 0

Accessors

endPoint

get endPoint(): Vector2

- Defined in unit/arc/index.ts:233
圆弧终点

The ending point of the arc

Returns Vector2

midPoint

get midPoint(): Vector2

- Defined in unit/arc/index.ts:202
圆弧弧周上的中点

The midpoint of the arc

Returns Vector2

midRadian

get midRadian(): number

- Defined in unit/arc/index.ts:192
均分圆弧的弧度

The radian of an evenly divided arc

Returns number

radian

get radian(): number

- Defined in unit/arc/index.ts:212
圆弧的开口弧度

The radian of the arc

Returns number

startPoint

get startPoint(): Vector2

- Defined in unit/arc/index.ts:223
圆弧起点

The starting point of the arc

Returns Vector2

Methods

clone

clone(): Arc

- Defined in unit/arc/index.ts:159
复制当前圆弧

Clones this arc to a new arc

Returns Arc

新的圆弧（A new Arc）

isAngleInsideArc

isAngleInsideArc(angle: number, tolerance?: number): boolean

- Defined in unit/arc/index.ts:272
判断角度是否在圆弧角度范围内

Parameters
- angle: number
- tolerance: number = ...
Returns boolean

isPointInsideArc

isPointInsideArc(point: Vector2, includeBorder?: boolean, distanceTol?: number, angleTol?: number): boolean

- Defined in unit/arc/index.ts:257
判断点是否在圆弧内（扇形内）

Parameters
- point: Vector2
- includeBorder: boolean = false
- distanceTol: number = ...
- angleTol: number = ...
Returns boolean

isPointOnArc

isPointOnArc(point: Vector2, distanceTol?: number, angleTol?: number): boolean

- Defined in unit/arc/index.ts:243
判断点是否在圆弧上

Parameters
- point: Vector2
  
  目标点
- distanceTol: number = ...
- angleTol: number = ...
Returns boolean

rotate

rotate(radian: number): Arc

- Defined in unit/arc/index.ts:180
绕圆心旋转圆弧

Parameters
- radian: number
  
  旋转角度（正方向为圆弧方向）
Returns Arc

新的圆弧对象

setCenter

setCenter(center: Vector2): Arc

- Defined in unit/arc/index.ts:107
设置圆弧圆心

Parameters
- center: Vector2
  
  圆心坐标
Returns Arc

当前圆弧

setClockwise

setClockwise(value: boolean): Arc

- Defined in unit/arc/index.ts:147
设置圆弧的方向（是否顺时针）

Parameters
- value: boolean
  
  是否顺时针
Returns Arc

当前圆弧

setEndRadian

setEndRadian(radian: number): Arc

- Defined in unit/arc/index.ts:137
设置圆弧的终止角

Parameters
- radian: number
  
  终止角的角度
Returns Arc

当前圆弧

setRadius

setRadius(radius: number): Arc

- Defined in unit/arc/index.ts:117
设置圆弧半径

Parameters
- radius: number
  
  半径
Returns Arc

当前圆弧

setStartRadian

setStartRadian(radian: number): Arc

- Defined in unit/arc/index.ts:127
设置圆弧的起始角

Parameters
- radian: number
  
  起始角的角度
Returns Arc

当前圆弧

toPoints

toPoints(length: number): Vector2[]

- Defined in unit/arc/index.ts:285
获取圆弧的散点集

Parameters
- length: number
  
  要用多少个散点表示圆弧
Returns Vector2[]

translate

translate(v: Vector2): Arc

- Defined in unit/arc/index.ts:169
平移圆弧

Parameters
- v: Vector2
  
  平移向量
Returns Arc

新的圆弧对象

Static createByBoundaryPoint

createByBoundaryPoint(center: Vector2, startPoint: Vector2, endPoint: Vector2, isClockwise?: boolean): Arc

- Defined in unit/arc/index.ts:45
通过边界点构造一个圆弧

Construct an arc through boundary points

Parameters
- center: Vector2
  
  圆心
- startPoint: Vector2
  
  圆弧起点
- endPoint: Vector2
  
  圆弧终点
- isClockwise: boolean = ...
  
  是否逆时针（默认：true）
Returns Arc

圆弧

Static createByThreePoint

createByThreePoint(startPoint: Vector2, arcPoint: Vector2, endPoint: Vector2, isClockwise?: boolean): Arc

- Defined in unit/arc/index.ts:21
通过圆弧上不同的三个点构造一个圆弧

Parameters
- startPoint: Vector2
  
  起点
- arcPoint: Vector2
  
  弧上任意点（不为 startPoint/endPoint）
- endPoint: Vector2
  
  终点
- isClockwise: boolean = ...
Returns Arc

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