62 lines
1.3 KiB
TypeScript
62 lines
1.3 KiB
TypeScript
import { Vec2 } from 'cc'
|
||
|
||
export default class MathUtils {
|
||
/**
|
||
* 2个点之前的直线距离
|
||
* @param x1
|
||
* @param y1
|
||
* @param x2
|
||
* @param y2
|
||
*/
|
||
public static distance(x1: number, y1: number, x2: number, y2: number) {
|
||
// 设两点A（X1,Y1）,B（X2,Y2）
|
||
// 距离D=（X2-X1）的平方+（Y2-Y1）平方的和开平方
|
||
return Math.sqrt((x1 - x2) ** 2 + (y1 - y2) ** 2)
|
||
}
|
||
|
||
/**
|
||
* 2点间的向量
|
||
* @param p1
|
||
* @param p2
|
||
*/
|
||
public static sub(p1: Vec2, p2: Vec2) {
|
||
return new Vec2(p1.x - p2.x, p1.y - p2.y)
|
||
}
|
||
|
||
/**
|
||
* 弧度转角度
|
||
* @param radians
|
||
*/
|
||
public static radiansToDegrees(radians: number) {
|
||
return (180 / Math.PI) * radians
|
||
}
|
||
|
||
/**
|
||
* 角度转弧度
|
||
* @param degrees
|
||
*/
|
||
public static degreesToRadians(degrees: number) {
|
||
return (Math.PI * degrees) / 180
|
||
}
|
||
|
||
/**
|
||
* 返回2点间的弧度
|
||
* @param startP
|
||
* @param endP
|
||
*/
|
||
public static p2pRad(startP: Vec2, endP: Vec2) {
|
||
const rad: number = Math.atan2(endP.y - startP.y, endP.x - startP.x)
|
||
return rad
|
||
}
|
||
|
||
/**
|
||
* 针对捕鱼鱼的方向特定实现的鱼方向转换
|
||
* @param rot
|
||
*/
|
||
public static rotation2Fish(rot: number) {
|
||
if (rot >= 0 && rot <= 180) rot = 180 - rot
|
||
else rot = -180 - rot
|
||
return rot
|
||
}
|
||
}
|