//private double[][] SorthPath(IList<double[][]> path)
//{
// var tempPat = new List<double[][]>(path);
// var lastSubPath = tempPat.First();
// tempPat.Remove(lastSubPath);
// IEnumerable<double[]> coordinates = lastSubPath;
// while (tempPat.Any())
// {
// var newLastSubPath =
// tempPat.FirstOrDefault(x => DistanceHelpers.AreClose(x.First(), coordinates.First()));
// if (newLastSubPath != null)
// {
// tempPat.Remove(newLastSubPath);
// coordinates = newLastSubPath.Reverse().Concat(coordinates);
// continue;
// }
// newLastSubPath = tempPat.FirstOrDefault(x => DistanceHelpers.AreClose(x.First(), coordinates.Last()));
// if (newLastSubPath != null)
// {
// tempPat.Remove(newLastSubPath);
// coordinates = coordinates.Concat(newLastSubPath);
// continue;
// }
// newLastSubPath = tempPat.FirstOrDefault(x => DistanceHelpers.AreClose(x.Last(), coordinates.First()));
// if (newLastSubPath != null)
// {
// tempPat.Remove(newLastSubPath);
// coordinates = newLastSubPath.Concat(coordinates);
// continue;
// }
// newLastSubPath = tempPat.FirstOrDefault(x => DistanceHelpers.AreClose(x.Last(), coordinates.Last()));
// if (newLastSubPath != null)
// {
// tempPat.Remove(newLastSubPath);
// coordinates = coordinates.Concat(newLastSubPath.Reverse());
// continue;
// }
// throw new Exception("Something went wrong at path sorting");
// }
// if (!coordinates.First().SequenceEqual(path.First().First())) coordinates = coordinates.Reverse();
// return coordinates.ToArray();
//}
public static IList <RouteFeature> SortFeatures(List <RouteFeature> path, PointPosition startPosition, PointPosition endPosition)
{
var tempPat = new List <RouteFeature>(path);
var lastSubPath = tempPat.First();
tempPat.Remove(lastSubPath);
IEnumerable <RouteFeature> routeFeatures = new List <RouteFeature> {
lastSubPath
};
while (tempPat.Any())
{
var newLastSubPath = tempPat.FirstOrDefault(x =>
DistanceHelpers.AreClose(x.Data.Coordinates.First().ToDoubleArray(),
routeFeatures.First().Data.Coordinates.First().ToDoubleArray()));
if (newLastSubPath != null)
{
tempPat.Remove(newLastSubPath);
var result = new List <RouteFeature> {
newLastSubPath
};
result.AddRange(routeFeatures);
newLastSubPath.Data.Coordinates = newLastSubPath.Data.Coordinates.Reverse().ToArray();
routeFeatures = result;
continue;
}
newLastSubPath = tempPat.FirstOrDefault(x =>
DistanceHelpers.AreClose(x.Data.Coordinates.First().ToDoubleArray(),
routeFeatures.Last().Data.Coordinates.Last().ToDoubleArray()));
if (newLastSubPath != null)
{
tempPat.Remove(newLastSubPath);
var result = new List <RouteFeature>();
result.AddRange(routeFeatures);
result.Add(newLastSubPath);
routeFeatures = result;
continue;
}
newLastSubPath = tempPat.FirstOrDefault(x =>
DistanceHelpers.AreClose(x.Data.Coordinates.Last().ToDoubleArray(),
routeFeatures.First().Data.Coordinates.First().ToDoubleArray()));
if (newLastSubPath != null)
{
tempPat.Remove(newLastSubPath);
var result = new List <RouteFeature> {
newLastSubPath
};
result.AddRange(routeFeatures);
routeFeatures = result;
continue;
}
newLastSubPath = tempPat.FirstOrDefault(x =>
DistanceHelpers.AreClose(x.Data.Coordinates.Last().ToDoubleArray(),
routeFeatures.Last().Data.Coordinates.Last().ToDoubleArray()));
if (newLastSubPath != null)
{
tempPat.Remove(newLastSubPath);
var result = new List <RouteFeature>();
result.AddRange(routeFeatures);
result.Add(newLastSubPath);
newLastSubPath.Data.Coordinates = newLastSubPath.Data.Coordinates.Reverse().ToArray();
routeFeatures = result;
continue;
}
throw new Exception("Something went wrong at feature sorting");
}
if (!routeFeatures.First().Data.Coordinates.First().ToDoubleArray()
.SequenceEqual(path.First().Data.Coordinates.First().ToDoubleArray()))
{
routeFeatures = routeFeatures.Reverse();
foreach (var f in routeFeatures)
{
f.Data.Coordinates = f.Data.Coordinates.Reverse().ToArray();
}
}
else if (routeFeatures.Count() == 1)
{
var projectionStart = DistanceHelpers.GetProjectionOnFeature(
routeFeatures.First().Data.Coordinates.Select(x => x.ToDoubleArray()).ToArray(),
startPosition.ToDoubleArray());
var projectionEnd = DistanceHelpers.GetProjectionOnFeature(
routeFeatures.First().Data.Coordinates.Select(x => x.ToDoubleArray()).ToArray(),
endPosition.ToDoubleArray());
var featureSegments = DistanceHelpers.SplitFeatureIntoLineSegments(routeFeatures.First().Data
.Coordinates.Select(x => x.ToDoubleArray()).ToArray());
var indexStart = FindIndex(projectionStart.Item1, featureSegments);
var indexEnd = FindIndex(projectionEnd.Item1, featureSegments);
if (indexEnd < indexStart)
{
routeFeatures.First().Data.Coordinates = routeFeatures.First().Data.Coordinates.Reverse().ToArray();
}
}
return(routeFeatures.ToArray());
}
