private void GeneratePointsToBeMoved(IDictionary<byte, IList<Point>> pointsDict, out List<Point> pointsToBeMoved, out IList<Path> paths, out IList<Path> target)
{
int k = TspInstanceConstants.K_VALUE;
Random r = new Random();
int id = r.Next(NumberOfPoints);
//id = (firstToBeMoved++)%100;
pointsToBeMoved = new List<Point>();
Group toBeMoved = new Group(5);
var allPoints = CreateAllPoints(pointsDict);
//pointsDict.ke
Point firstToMove = allPoints[id];
pointsToBeMoved.Add(firstToMove);
toBeMoved.AddPoint(firstToMove);
//pointsToBeMoved.AddRange(allPoints.Except(pointsToBeMoved).OrderBy(p => p.Distance(firstToMove)).Take(k - 1));
Point tmp;
for (int i = 0; i < k - 1; i++)
{
tmp = allPoints.Except(pointsToBeMoved).OrderBy(p => p.Distance(toBeMoved.centerOfMass)).First();
toBeMoved.AddPoint(tmp);
pointsToBeMoved.Add(tmp);
}
paths = new List<Path>();
target = new List<Path>();
var pointsFromJoinedPaths = new List<Point>();
foreach (var item in pointsToBeMoved)
{
bool added = false;
foreach (var path in paths)
{
if (path.points.First().id == item.id)
{
int pos = pointsDict[item.groupId].IndexOf(item);
if (pos == 0)
pos = TspInstanceConstants.NUMBER_OF_POINTS_PER_GROUP;
path.points.AddFirst(pointsDict[item.groupId][pos - 1]);
added = true;
}
else if (path.points.Last().id == item.id)
{
int pos = pointsDict[item.groupId].IndexOf(item);
if (pos == TspInstanceConstants.NUMBER_OF_POINTS_PER_GROUP - 1)
pos = -1;
path.points.AddLast(pointsDict[item.groupId][pos + 1]);
added = true;
}
else if (path.points.Contains(item))
{
added = true;
}
}
if (!added)
{
Path newPath = new Path();
int prev = pointsDict[item.groupId].IndexOf(item);
int next = prev;
if (prev == 0)
prev = TspInstanceConstants.NUMBER_OF_POINTS_PER_GROUP;
newPath.points.AddFirst(pointsDict[item.groupId][prev - 1]);
newPath.points.AddLast(item);
if (next == TspInstanceConstants.NUMBER_OF_POINTS_PER_GROUP - 1)
next = -1;
newPath.points.AddLast(pointsDict[item.groupId][next + 1]);
paths.Add(newPath);
}
while (true)
{
Path toRemove = null;
foreach (var path in paths)
{
foreach (var innerPath in paths)
if (path.points.Last.Value.id == innerPath.points.First.Value.id)
{
pointsFromJoinedPaths.Add(path.points.Last.Value);
k++;
foreach (var point in innerPath.points.Skip(1))
{
path.points.AddLast(point);
}
toRemove = innerPath;
}
if (toRemove != null)
break;
}
if (toRemove == null)
break;
else
paths.Remove(toRemove);
}
}
foreach (var path in paths)
{
if (pointsToBeMoved.Contains(path.points.First.Value) || pointsToBeMoved.Contains(path.points.Last.Value))
throw new Exception("Unknown error! PLEASE TRY AGAIN!");
}
pointsToBeMoved.AddRange(pointsFromJoinedPaths);
foreach (var path in paths)
target.Add(new Path(path.points.First.Value));
//setting groupId for all points
for (byte i = 0; i < 4; i++)
{
foreach (var point in pointsDict[i])
{
point.groupId = i;
}
}
}
//private IDictionary<byte, IList<Point>> CreateRandomGroups(IList<Point> allPoints)
//{
// IDictionary<byte, IList<Point>> pointsDict = new Dictionary<byte, IList<Point>>();
// pointsDict[0] = new List<Point>();
// pointsDict[1] = new List<Point>();
// pointsDict[2] = new List<Point>();
// pointsDict[3] = new List<Point>();
// for (var i = 0; i < allPoints.Count; i++)
// {
// allPoints[i].groupId = (byte)(i / 25);
// pointsDict[(byte)(i / 25)].Add(allPoints[i]);
// }
// var changes = 100;
// var rand = new Random();
// while (changes > 0)
// {
// var g1 = (byte)rand.Next(4);
// var g2 = (byte)rand.Next(4);
// var e1 = rand.Next(TspInstanceConstants.NUMBER_OF_POINTS_PER_GROUP);
// var e2 = rand.Next(TspInstanceConstants.NUMBER_OF_POINTS_PER_GROUP);
// var tmp = pointsDict[g1][e1];
// tmp.groupId = g2;
// pointsDict[g1][e1] = pointsDict[g2][e2];
// pointsDict[g1][e1].groupId = g1;
// pointsDict[g2][e2] = tmp;
// changes--;
// }
// return pointsDict;
//}
private IDictionary<byte, IList<Point>> CreateGroups(IList<Point> allPoints)
{
IDictionary<byte, IList<Point>> pointsDict = new Dictionary<byte, IList<Point>>();
Random rand = new Random();
int pos = rand.Next(NumberOfPoints);
//int pos = 91;
groups[0] = new Group(0);
pointsDict[0] = new List<Point>();
pointsDict[0].Add(allPoints[pos]);
allPoints[pos].groupId = 0;
groups[0].AddPoint(allPoints[pos]);
centerOfMass.AddPoint(allPoints[pos]);
allPoints.RemoveAt(pos);
Point point;
for (byte groupIndex = 1; groupIndex < 4; groupIndex++)
{
pointsDict[groupIndex] = new List<Point>();
groups[groupIndex] = new Group(groupIndex);
point = allPoints.OrderBy(p => p.Distance(centerOfMass)).Last();
point.groupId = groupIndex;
//int max = allPoints.Max(p => p.Distance(centerOfMass));
groups[groupIndex].AddPoint(point);
pointsDict[groupIndex].Add(point);
centerOfMass.AddPoint(point);
allPoints.Remove(point);
}
while (allPoints.Any())
{
// 4 | allPoints.Count()
for (byte groupIndex = 0; groupIndex < 4; groupIndex++)
{
point = allPoints.OrderBy(p => p.Distance(groups[groupIndex].centerOfMass)).First();
point.groupId = groupIndex;
groups[groupIndex].AddPoint(point);
pointsDict[groupIndex].Add(point);
allPoints.Remove(point);
}
}
return pointsDict;
}
