Class Polygon

多边形

Hierarchy

Shape
- Polygon
  - Box

Index

Constructors

constructor

Properties

Accessors

edgeNormals

Methods

Constructors

constructor

new Polygon(points: Vector2[], isBox?: boolean): Polygon

- Defined in src/Physics/Shapes/Polygon.ts:22
从点构造一个多边形多边形应该以顺时针方式指定不能重复第一个/最后一个点，它们以0 0为中心

Parameters
- points: Vector2[]
- Optional isBox: boolean
Returns Polygon

Properties

_areEdgeNormalsDirty

_areEdgeNormalsDirty: boolean = true

_edgeNormals

_edgeNormals: Vector2[]

_originalPoints

_originalPoints: Vector2[]

多边形的原始数据

_polygonCenter

_polygonCenter: Vector2

bounds

bounds: Rectangle

缓存的形状边界内部字段

center

center: Vector2

这不是中心。这个值不一定是物体的中心。对撞机更准确。应用任何转换旋转的localOffset 内部字段

isBox

isBox: boolean

用于优化未旋转box碰撞

isUnrotated

isUnrotated: boolean = true

points

points: Vector2[]

组成多边形的点保持顺时针与凸边形

position

position: Vector2

有一个单独的位置字段可以让我们改变形状的位置来进行碰撞检查，而不是改变entity.position。触发碰撞器/边界/散列更新的位置。内部字段

Accessors

edgeNormals

get edgeNormals(): Vector2[]

- Defined in src/Physics/Shapes/Polygon.ts:43
边缘法线用于SAT碰撞检测。缓存它们用于避免squareRoots box只有两个边缘因为其他两边是平行的

Returns Vector2[]

Methods

buildEdgeNormals

buildEdgeNormals(): void

- Defined in src/Physics/Shapes/Polygon.ts:76
建立多边形边缘法线它们仅由edgeNormals getter惰性创建和更新

Returns void

collidesWithLine

collidesWithLine(start: Vector2, end: Vector2, hit: RaycastHit): boolean

Overrides Shape.collidesWithLine
- Defined in src/Physics/Shapes/Polygon.ts:296
Parameters
- start: Vector2
- end: Vector2
- hit: RaycastHit
Returns boolean

collidesWithShape

collidesWithShape(other: Shape, result: CollisionResult): boolean

Overrides Shape.collidesWithShape
- Defined in src/Physics/Shapes/Polygon.ts:279
Parameters
- other: Shape
- result: CollisionResult
Returns boolean

containsPoint

containsPoint(point: Vector2): boolean

Overrides Shape.containsPoint
- Defined in src/Physics/Shapes/Polygon.ts:305
本质上，这个算法所做的就是从一个点发射一条射线。如果它与奇数条多边形边相交，我们就知道它在多边形内部。

Parameters
- point: Vector2
Returns boolean

overlaps

overlaps(other: Shape): any

Overrides Shape.overlaps
- Defined in src/Physics/Shapes/Polygon.ts:262
Parameters
- other: Shape
Returns any

pointCollidesWithShape

pointCollidesWithShape(point: Vector2, result: CollisionResult): boolean

Overrides Shape.pointCollidesWithShape
- Defined in src/Physics/Shapes/Polygon.ts:321
Parameters
- point: Vector2
- result: CollisionResult
Returns boolean

recalculateBounds

recalculateBounds(collider: Collider): void

Overrides Shape.recalculateBounds
- Defined in src/Physics/Shapes/Polygon.ts:213
Parameters
- collider: Collider
Returns void

recalculateCenterAndEdgeNormals

recalculateCenterAndEdgeNormals(): void

- Defined in src/Physics/Shapes/Polygon.ts:67
重新计算多边形中心如果点数改变必须调用该方法

Returns void

setPoints

setPoints(points: Vector2[]): void

- Defined in src/Physics/Shapes/Polygon.ts:53
重置点并重新计算中心和边缘法线

Parameters
- points: Vector2[]
Returns void

Static buildSymmetricalPolygon

buildSymmetricalPolygon(vertCount: number, radius: number): any[]

- Defined in src/Physics/Shapes/Polygon.ts:101
建立一个对称的多边形(六边形，八角形，n角形)并返回点

Parameters
- vertCount: number
- radius: number
Returns any[]

Static findPolygonCenter

findPolygonCenter(points: Vector2[]): Vector2

- Defined in src/Physics/Shapes/Polygon.ts:126
找到多边形的中心。注意，这对于正则多边形是准确的。不规则多边形没有中心。

Parameters
- points: Vector2[]
Returns Vector2

Static getClosestPointOnPolygonToPoint

getClosestPointOnPolygonToPoint(points: Vector2[], point: Vector2, distanceSquared: Ref<number>, edgeNormal: Vector2): Vector2

- Defined in src/Physics/Shapes/Polygon.ts:166
迭代多边形的所有边，并得到任意边上离点最近的点。通过最近点的平方距离和它所在的边的法线返回。点应该在多边形的空间中(点-多边形.位置)

Parameters
- points: Vector2[]
- point: Vector2
- distanceSquared: Ref<number>
- edgeNormal: Vector2
Returns Vector2

Static getFarthestPointInDirection

getFarthestPointInDirection(points: Vector2[], direction: Vector2): Vector2

- Defined in src/Physics/Shapes/Polygon.ts:142
不知道辅助顶点，所以取每个顶点，如果你知道辅助顶点，执行climbing算法

Parameters
- points: Vector2[]
- direction: Vector2
Returns Vector2

Static recenterPolygonVerts

recenterPolygonVerts(points: Vector2[]): void

- Defined in src/Physics/Shapes/Polygon.ts:116
重定位多边形的点

Parameters
- points: Vector2[]
Returns void

Static rotatePolygonVerts

rotatePolygonVerts(radians: number, originalPoints: Vector2[], rotatedPoints: Vector2[]): void

- Defined in src/Physics/Shapes/Polygon.ts:203
旋转原始点并复制旋转的值到旋转的点

Parameters
- radians: number
- originalPoints: Vector2[]
- rotatedPoints: Vector2[]
Returns void

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