SteamTools/System.Common.CoreLib/Extensions/SingleExtensions.cs

// ReSharper disable once CheckNamespace
namespace System
{
    public static partial class SingleExtensions
    {
        /// <summary>
        /// (向下取整)返回小于或等于指定数字的最大整数值
        /// </summary>
        /// <param name="f"></param>
        /// <returns></returns>
        public static int FloorToInt(this float f) => (int)MathF.Floor(f);

        /// <summary>
        /// (进一法)返回大于或等于指定数字的最小整数值
        /// </summary>
        /// <param name="f"></param>
        /// <returns></returns>
        public static int CeilingToInt(this float f) => (int)MathF.Ceiling(f);

        /// <summary>
        /// 将值舍入到最接近的整数或指定的小数位数
        /// </summary>
        /// <param name="f"></param>
        /// <param name="mode">在两个数字之间时如何舍入的规范</param>
        /// <returns></returns>
        public static int RoundToInt(this float f, MidpointRounding mode) => (int)MathF.Round(f, mode);

        /// <summary>
        /// (五舍六入)将值舍入到最接近的整数或指定的小数位数
        /// </summary>
        /// <param name="f"></param>
        /// <returns></returns>
        public static int RoundToInt(this float f) => (int)MathF.Round(f);

        /// <summary>
        /// (四舍五入)将值舍入到最接近的整数或指定的小数位数
        /// </summary>
        /// <param name="f"></param>
        /// <returns></returns>
        public static int Round2ToInt(this float f) => (int)MathF.Round(f, MidpointRounding.AwayFromZero);
    }
}