module els{
    export class MathUtils{
        //转化为弧度
        static TO_RADIAN: number = Math.PI / 180;
         //转化为角度
        static TO_DEGREE: number = 180 / Math.PI;

        //将角度转化为弧度
        static toRadian(a: number): number {
            return a * this.TO_RADIAN;
        }

        //将弧度转化为角度
        static toDegree(radian: number): number {
            return radian * this.TO_DEGREE;
        }
    }
}