//public void getSubLineFromDKCode(string dkcode, double mileage, double dis, out double[] x, out double[] y, out double[] z, out double[] dir)
//{
// x = y = z = dir = null;
// double m = getPathMileageByDKCode(dkcode, mileage) ;
// double m1, m2;
// if (dis > 0)
// {
// m1 = m;
// m2 = m + dis;
// }else
// {
// m1 = m + dis;
// m2 = m;
// }
// int fromIdx = getMileageIndex(m1);
// int toIdx = getMileageIndex(m2);
//}
//int getMileageIndex(double mileage)
//{
// if (mileage < 0 || mileage > mLength)
// return -1;
// int l = 0, r = mm.Length - 1;
// int mid = (l + r) / 2;
// while (l < r)
// {
// if (mileage < mm[mid])
// r = mid - 1;
// else if (mileage > mm[mid])
// l = mid + 1;
// else
// return mid;
// mid = (l + r) / 2;
// }
// r = Math.Max(r, 0);
// l = Math.Min(l, mm.Length-1);
// return Math.Abs(mm[r] - mileage) < Math.Abs(mm[l] - mileage) ? r :l ;
//}
///// <summary>
///// 计算偏移一定角度和距离之后的经纬度
///// </summary>
///// <param name="startDKM"></param>
///// <param name="endDKM"></param>
///// <param name="stepm"></param>
///// <param name="angleOff"></param>
///// <param name="disOff"></param>
///// <param name="latout"></param>
///// <param name="lonout"></param>
///// <param name="z"></param>
///// <returns></returns>
//public int getOffsetLine(double angleOff, double disOff, out double[] latout, out double[] lonout, out double[] z)
//{
// lonout = latout = z = null;
// //double[] x = null;
// //double[] y = null;
// ////double[] z = null;
// //double[] d = null;
// //int pointNum = getSubLineByDKCode(startDKM, endDKM, stepm, out x, out y, out z, out d);
// if (mPointCount > 0)
// {
// latout = new double[mPointCount];
// lonout = new double[mPointCount];
// for (int i = 0; i < mPointCount; i++)
// {
// CoordinateConverter.LatLonOffest(my[i], mx[i], md[i], angleOff, disOff, out latout[i], out lonout[i]); //lat, lon
// }
// z = mz;
// }
// return mPointCount;
//}
///// <summary>
///// 求点与多条线段的最短距离，如果投影在多条线段内，返回t,否则f
///// </summary>
///// <param name="x">点</param>
///// <param name="y">点</param>
///// <param name="xa">多线段</param>
///// <param name="ya"></param>
///// <param name="ma"></param>
///// <param name="fromid">多线段起点下标</param>
///// <param name="toid">终点下标</param>
///// <param name="m">最近点</param>
///// <param name="dis">距离</param>
///// <returns></returns>
//private bool getDistance(double x, double y, double[]xa, double[] ya, double[] ma ,int fromid, int toid, out double m, out double dis)
//{
// bool found = false;
// m = dis = 0;
// double lx = xa[fromid];
// double ly = ya[fromid];
// double rx = xa[toid];
// double ry = ya[toid];
// if ((x - lx) * (rx - lx) + (y - ly) * (ry - ly) < 0)
// {
// m = ma[fromid];
// dis = CoordinateConverter.getUTMDistance(x, y, lx, ly);
// }
// else if ((x - rx)*(lx - rx) + (y - ry) * (ly - ry) < 0)
// {
// m = ma[toid];
// dis = CoordinateConverter.getUTMDistance(x, y, rx, ry);
// }
// else
// {
// found = true;
// int minid = fromid;
// dis = CoordinateConverter.getUTMDistance(x, y, lx, ly);
// for (int i = fromid + 1; i<= toid; i++)
// {
// double di = CoordinateConverter.getUTMDistance(x, y, xa[i], ya[i]);
// if (di < dis) {
// dis = di;
// minid = i;
// }
// }
// int lid = minid - 1;
// if (lid < fromid) lid = fromid;
// int rid = minid + 1;
// if (rid > toid) rid = toid;
// double d1 = CoordinateConverter.getUTMDistance(x, y, xa[lid], ya[lid]);
// double d2 = CoordinateConverter.getUTMDistance(x, y, xa[rid], ya[rid]);
// double ddd =d1 /(d1 + d2);
// //if (d1 > d2)
// //{
// // ddd = disInterpolate(x, y, xa[lid], ya[lid], xa[rid], ya[rid]);
// //}
// //else
// //{
// // ddd = 1 - disInterpolate(x,y,xa[rid],ya[rid],xa[lid],ya[lid]);
// //}
// m = ma[lid] + (ma[rid]-ma[lid]) * ddd;
// double xm = xa[lid] + (xa[rid]-xa[lid]) *ddd;
// double ym = ya[lid] + (ya[rid] - ya[lid]) * ddd;
// dis = CoordinateConverter.getUTMDistance(x, y, xm, ym);
// }
// return found;
//}
///误差太大
//private double disInterpolate(double x1,double y1,double x2,double y2,double x3,double y3)
//{
// double dx1 = x1 - x2;
// double dy1 = y1 - y2;
// double dx2 = x3 - x2;
// double dy2 = y3 - y2;
// double len1 = Math.Sqrt(dx1 * dx1 + dy1 * dy1);
// double len2 = Math.Sqrt(dx2 * dx2 + dy2 * dy2);
// double cosa = (dx1 * dx2 + dy1 * dy2) / len1 / len2;
// double d = len1 * Math.Sqrt (1 - cosa * cosa);
// return d / len2;
//}
/// <summary>
/// 给定经纬度，输出最近点里程与距离
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="mileage"></param>
/// <param name="distance"></param>
public void getPathMileagebyGPS(double x, double y, out double mileage, out double distance)
{
distance = 5000000;
mileage = -1;
if (!hasPath)
{
return;
}
//double m, d;
//int step = Math.Max(100, (int)Math.Sqrt(mPointCount));
//int toid = 0;
//for (int i = 0; i<mPointCount; i+= step)
//{
// toid = Math.Min(i + step , mPointCount - 1);
// getDistance(x, y, mx, my, mm, i, toid, out m, out d);
// if (d<distance)
// {
// distance = d;
// mileage = m;
// }
//}
CSubLine.getMileagebyGPS(x, y, mm, mx, my, out mileage, out distance);
}
/// <summary>
/// 给定经纬度，输出里程与距离
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="mileage"></param>
/// <param name="distance"></param>
public void getDKMileagebyGPS(double x, double y, out double mileage, out double distance)
{
CSubLine.getMileagebyGPS(x, y, meter, longitude, latitude, out mileage, out distance);
mileage = getDKMileagebyLocalMileage(mileage);
}