Version: 1.0.01.0.11.0.21.0.3-beta.11.0.31.0.41.0.5-beta.11.0.51.0.6-beta.21.0.61.0.71.0.81.0.91.0.101.0.111.0.121.1.01.1.11.2.01.2.11.2.21.2.31.2.41.2.51.3.01.3.12.0.02.0.1-beta.12.0.12.0.22.0.32.0.42.0.52.0.62.0.72.0.82.0.92.0.102.0.112.0.122.0.132.0.142.0.152.0.162.0.173.0.0-beta.13.0.03.0.13.0.23.1.03.1.13.1.23.2.03.2.13.2.23.2.33.2.43.2.53.3.03.3.13.3.23.3.33.3.43.3.53.3.63.3.7
/**
* 二维向量 v1 到 v2 的夹角
* @param v1
* @param v2
* @param direct
*/
export declare function angleTo(v1: [number, number], v2: [number, number], direct?: boolean): number;