XNA中FPS统计刷新率频率类

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转载自博客园风海迷沙，原文地址：http://www.cnblogs.com/fhmsha/archive/2009/03/27/xna_fps_class.html

    /// <summary>        /// 计算FPS类        /// </summary>        public static class FpsCounter    {        private static int frames;        private static int milliseconds;        private static int interval = 1000;        private static float fps;        /// <summary>         /// 得到当前的FPS         /// </summary>                public static float Fps        {            get { return fps; }        }        /// <summary>             /// 设置/获取用于计算FPS的时间间隔（毫秒）        /// 默认值1000             /// </summary>                public static int Interval        {            get { return interval; }            set { interval = value; }        }        /// <summary>             /// 在每一帧调用             /// </summary>             /// <param name="time">自从上一帧经过的时间</param>             /// <returns>如果经过的时间大于设置的间隔时间就返回true</returns>                public static bool NewFrame(GameTime time)        {            frames++;            milliseconds += time.ElapsedRealTime.Milliseconds;            if (milliseconds >= interval)            {                fps = frames * 1000.0f / (float)milliseconds;                frames = 0;                milliseconds -= interval;                return true;            }            return false;        }    }