using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows.Forms;namespace 改为相关项目的命名空间{    /// 
    /// 常用角度处理类    /// 
    /// 
     
      llc3s@foxmail.com
         public class CommonAngleFun    {        #region 十进制度转化为弧度        /// 
        /// 十进制度转化为弧度        /// 
        ///         /// 
             public static double deg2rad(double dd)        {            return dd * Math.PI / 180.0;        }        #endregion        #region 空格分隔的度分秒转化为十进制度        /// 
        /// 空格分隔的度分秒转化为十进制度        /// 
        ///         public static double str2dfm(string temp)        {            temp = temp.Trim();            double[] ang = new double[3];            double j = -1.0;            //验证是否为合格的度分秒            try            {                string[] angles = temp.Split(" ".ToCharArray());                if (angles.Length != 3)                {                    MessageBox.Show("度分秒格式不合格");                    return j;                }                for (int i = 0; i < 3; i++)                {                    ang[i] = double.Parse(angles[i]);                }                j = ang[0] + ang[1] / 60 + ang[2] / 3600;            }            catch            {                MessageBox.Show("不是合格的度分秒数据,度分秒之间以空格分隔");            }            return j;        }        #endregion        #region 空格分隔的度分秒字符串转化为弧度        /// 
        /// 空格分隔的度分秒转化为弧度        /// 
        ///         /// 
             public static double str2rad(string temp)        {            return deg2rad(str2dfm(temp));        }        #endregion        #region 弧度转化为十进制度        /// 
        /// 弧度转化为十进制度分秒        /// 
        ///         public static double rad2Degree(double rad)        {            double degree = rad * 180 / Math.PI;            return degree;        }        #endregion        #region 十进制度转化为度分秒        /// 
        /// 十进制度转化为度分秒        /// 
        ///         /// 表示十进制度转化为度分秒时秒位保留的小数位数        /// 
             public static double[] degree2DFM(double degree,int n)        {            double[] dfm = new double[3];            double d = Math.Floor(degree);            double f = Math.Floor((degree - d) * 60);            double m = Math.Round(((degree - d) * 60 - f) * 60,0);            dfm[0] = d;            dfm[1] = f;            dfm[2] = m;            return dfm;        }        #endregion        #region 度分秒转化为空格分隔的字符串        /// 
        /// 度分秒转化为空格分隔的字符串        /// 
        ///         /// 
             public static string dfm2Str(double[] dfm)        {            string str = string.Empty;            for (int i = 0; i < dfm.Length; i++)            {                str += dfm[i].ToString() + " ";            }            return str;        }        #endregion        #region 弧度转化为空格分隔的度分秒字符串        /// 
        /// 弧度转化为空格分隔的度分秒字符串        /// 
        ///         /// 十进制度转化为度分秒时秒位的小数位数        /// 
             public static string rad2StrDfm(double rad,int n)        {            return dfm2Str(degree2DFM(rad2Degree(rad),n));        }        #endregion        #region 夹角计算        /// 
        /// 夹角计算.用于测量中方向观测法或类似的夹角计算        /// 
        ///         ///         /// 
             private double[] jiajiao(double[] ang1, double[] ang2)        {            if (ang1.Length != 3 || ang2.Length != 3)            {                MessageBox.Show("错误");                return null;            }            else            {                //预处理                //度位待求方向是否大于0方向,不大于,加360;                if (ang2[0] < ang1[0])                    ang2[0] += 360;                //bool mj = false;                //bool dj = false; //度/分借位标记.                if (ang2[2] < ang1[2])                {                    //mj = true;                    ang2[2] += 60;                    ang2[1] -= 1; //秒位加60,分位-1                }                if (ang2[1] < ang1[1])                {                    //dj=true;                    ang2[1] += 60;                    ang2[0] -= 1; //分位加60,度位-1;                }                //开始计算                double[] result = new double[3];                for (int i = 0; i < 3; i++)                {                    result[i] = ang2[i] - ang1[i];                }                return result;            }        }        #endregion        #region 方位角计算        /// 
        /// 方位角计算(第二个点减第一个点)        /// 
        /// 第一个点        /// 第一个点        /// 第二个点        /// 第二个点        /// 
             public static double fangweijiao(double x1, double y1, double x2, double y2)        {            double fjrad = Math.Atan(Math.Abs((y1 - y2) / (x1 - x2)));            //判断象限            //第一象限            if (y2 - y1 > 0 && x2 - x1 > 0)                return fjrad;            //第二象限            else if (y2 - y1 > 0 && x2 - x1 < 0)            {                return Math.PI - fjrad;            }            else if (y2 - y1 < 0 && x2 - x1 < 0)            {                //第三象限                return Math.PI + fjrad;            }            else if (y2 - y1 < 0 && x2 - x1 > 0)            {                //第四象限                return (Math.PI * 2 - fjrad);            }            else                return -1;        }        #endregion        #region 任意两方位角的夹角计算        #endregion    }}