@jtopo/core / Point

Class: Point

只是提供了一些操作点和点集合的静态方法

Table of contents

Constructors

• constructor

Methods

• distance
• getAngle
• isLikePoint
• lerp
• looksSame
• middle
• rotate

Constructors

constructor

new Point()

Methods

distance

Static distance(x, y, x2, y2): number

计算两点之间的距离

Parameters

Name	Type
x	number
y	number
x2	number
y2	number

Returns

number

---

getAngle

Static getAngle(x, y, x2, y2): number

Parameters

Name	Type
x	number
y	number
x2	number
y2	number

Returns

number

---

isLikePoint

Static isLikePoint(object): boolean

Parameters

Name	Type
object	any

Returns

boolean

---

lerp

Static lerp(a, b, t): PointLike

根据给定的比例t，计算出线段上一点

Parameters

Name	Type	Description
a	PointLike	第一个点的坐标
b	PointLike	第二个点的坐标
t	number	比例值，公式：(1-t) * a + t*b

Returns

PointLike

• 插值点的坐标

---

looksSame

Static looksSame(p1, p2, e): boolean

Parameters

Name	Type
p1	PointLike
p2	PointLike
e	number

Returns

boolean

---

middle

Static middle(p1, p2): Object

Parameters

Name	Type
p1	PointLike
p2	PointLike

Returns

Object

Name	Type
x	number
y	number

---

rotate

Static rotate(x, y, cx, cy, angle): PointLike

点(x,y) 绕点 (cx,cy) 旋转angle后的坐标

Parameters

Name	Type
x	number
y	number
cx	number
cy	number
angle	number

Returns

PointLike