/// <summary>
/// remove the nodes in trajectory in order to for sure
/// that the distance between any nodes are larger than threshold
/// </summary>
/// <param name="t"></param>
/// <param name="threshhold"></param>
/// <returns></returns>
private Trajectory pruneTrajectory(Trajectory t, double threshhold = 0.1)
{
Trajectory xo = new Trajectory();
foreach (Point p in t)
{
if (xo.Count == 0)
{
xo.add_point(p);
continue;
}
double mindis = 1e10;
foreach (Point x in xo)
{
mindis = Math.Min(mindis, TBMath.distance(x, p));
}
if (mindis > threshhold)
xo.add_point(p);
}
return xo;
}
private Trajectory backtrace(Point source, Point target)
{
int endx = d2i(target.x);
int endy = d2i(target.y);
int fx = 0, fy = 0;
for (int step = 0; ; step++)
{
for (int i = -step; i <= step; i++)
for (int j = -step; j <= step; j++)
{
if (endx + i < 0) return new Trajectory();
if (endy + j < 0) return new Trajectory();
if (endx + i >= WIDTH) return new Trajectory();
if (endy + j >= WIDTH) return new Trajectory();
if (visit[endx + i, endy + j])
{
fx = endx + i;
fy = endy + j;
goto brk;
}
}
}
brk:
Trajectory t = new Trajectory();
while (true)
{
if (fx == d2i(source.x) && fy == d2i(source.y))
break;
t.add_point(new Point(i2d(fx), i2d(fy)));
Tuple<int, int> pre = prev[fx, fy];
fx = pre.Item1;
fy = pre.Item2;
}
Trajectory rt = new Trajectory();
for (int i = t.Count - 1; i >= 0; i--)
{
rt.add_point(t[i]);
}
return rt;
}
private void loadTrajectory_obsolete()
{
using (StreamReader sr = new StreamReader(TBConst.trajectoryPath_obsolete + this.map_name + ".txt"))
{
int tot_point = 0;
while (true)
{
if (sr.EndOfStream)
break;
Trajectory traj = new Trajectory();
string comment = sr.ReadLine(); //replay_id 19 user_id 1686
string line = sr.ReadLine(); // 9.8 93.15 9.9 93.0 10.05 92.8 .......
string[] sp = line.Split(' ');
//for (int i = 0; i < sp.Length; i += 2)
{
int i = 0;
double x = Convert.ToDouble(sp[i]);
double y = Convert.ToDouble(sp[i + 1]);
x = (x + 105) / 21 + 1;
y = (y + 105) / 21 + 1;
traj.add_point(new Point(x, y));
}
traj.comment = comment;
traj = pruneTrajectory(traj, 0.05);
addToHeapmap_obsolete(traj);
traj.reversed = false;
trajs.Add(traj);
Trajectory rev = new Trajectory();
foreach (Point p in traj)
{
rev.add_point(p);
}
rev.Reverse();
rev.reversed = true;
trajs.Add(rev);
tot_point += traj.Count * 2;
}
}
}
/// <summary>
/// add the trajectory to the WIDTH * WIDTH heat map
/// </summary>
/// <param name="traj"></param>
private void addToHeapmap_obsolete(Trajectory traj)
{
for (int i = 1; i < traj.Count; i++)
{
Point p0 = traj[i - 1];
Point p1 = traj[i];
int x0 = d2i(p0.x);
int y0 = d2i(p0.y);
int x1 = d2i(p1.x);
int y1 = d2i(p1.y);
addToHeatmap(x0, y0, x1, y1);
}
}
