public static void TSPTest(VRPParser benchmark)
{
int k = 1;
Point[] points = new Point[benchmark.Num_Locations];
for (int i = 0; i <= benchmark.Num_Visits; i++)
{
List<double> point_coords = new List<double>();
point_coords.Add(benchmark.Location_Coord[i][0]);
point_coords.Add(benchmark.Location_Coord[i][1]);
if (i == 0) point_coords.Add(0);
else point_coords.Add(benchmark.Time_Avail[i - 1] + benchmark.Duration[i - 1]);
points[i] = new Point(point_coords);
}
var watch = Stopwatch.StartNew();
// int[] route = TSPTrianIneq.calculate(points);
watch.Stop();
var elapsedMs = watch.ElapsedMilliseconds;
Console.Write("");
}
public static VRPParser Test1()
{
VRPParser parser = new VRPParser();
parser.Name = "io2_8a";
parser.Num_Depots = 1;
parser.Num_Capacities = 1;
parser.Num_Visits = 8;
parser.Num_Locations = 9;
parser.Num_Vehicles = 8;
parser.Capacites = 100;
int[] depots = { 0 };
parser.Depots_IDs = depots;
int[] demands = { -23, -26, -26, -29, -13, -17, -36, -25 };
parser.Demands = demands;
int[][] location_coords = new int[9][]
{
new int[] { 0, 0 },
new int[] { 5, 61 },
new int[] { 74, 34 },
new int[] { -9, 92 },
new int[] { -8, 84 },
new int[] { -54, 20 },
new int[] { -33, 72 },
new int[] { -94, -79 },
new int[] { 71, 68 }
};
parser.Location_Coord = location_coords;
int[] depot_location = { 0 };
parser.Depot_Location = depot_location;
int[] visit_location = { 1, 2, 3, 4, 5, 6, 7, 8 };
parser.Visit_Location = visit_location;
int[] duration = { 20, 20, 20, 20, 20, 20, 20, 20 };
parser.Duration = duration;
int[][] depot_time = new int[1][]
{
new int[] { 0, 560 }
};
parser.Depot_Time_Window = depot_time;
int[] time_avail = { 334, 318, 53, 292, 82, 157, 301, 128 };
parser.Time_Avail = time_avail;
return(parser);
}
public static VRPParser Test1()
{
VRPParser parser = new VRPParser();
parser.Name = "io2_8a";
parser.Num_Depots = 1;
parser.Num_Capacities = 1;
parser.Num_Visits = 8;
parser.Num_Locations = 9;
parser.Num_Vehicles = 8;
parser.Capacites = 100;
int[] depots = {0};
parser.Depots_IDs = depots;
int[] demands = {-23, -26, -26, -29, -13, -17, -36, -25};
parser.Demands = demands;
int[][] location_coords = new int[9][]
{
new int[] {0,0},
new int[] {5,61},
new int[] {74,34},
new int[] {-9,92},
new int[] {-8,84},
new int[] {-54,20},
new int[] {-33,72},
new int[] {-94,-79},
new int[] {71,68}
};
parser.Location_Coord = location_coords;
int[] depot_location = { 0 };
parser.Depot_Location = depot_location;
int[] visit_location = {1,2,3,4,5,6,7,8};
parser.Visit_Location = visit_location;
int[] duration = {20,20,20,20,20,20,20,20};
parser.Duration = duration;
int[][] depot_time = new int[1][]
{
new int[] {0, 560}
};
parser.Depot_Time_Window = depot_time;
int[] time_avail = { 334, 318, 53, 292, 82, 157, 301, 128 };
parser.Time_Avail = time_avail;
return parser;
}
public static Result calculate(VRPParser benchmark, float cutOffTime)
{
int num_depots = benchmark.Num_Depots;
List<int> nextDay = new List<int>();
/* Convert benchmark into points. */
List<Point> points = new List<Point>();
for (int j = 0; j < benchmark.Num_Locations; j++)
{
int time;
if (j - 1 < 0) time = 0;
else time = benchmark.Time_Avail[j - 1];
points.Add(new Point(benchmark.Location_Coord[j][0],benchmark.Location_Coord[j][1], time));
}
/* Get rid of the points which are appearing after cut off */
List<Point> tmp = new List<Point>();
for (int i = 0; i < points.Count; i++ )
{
if (points[i].Z < cutOffTime)
{
tmp.Add(points[i]);
}
else nextDay.Add(i);
}
points = tmp;
/* Convert points into a graph. */
Graph graph = new Graph(points.Count);
for (int i = 0; i < points.Count; i++)
{
for (int j = i + 1; j < points.Count; j++)
{
graph.addEdge(i, j, euclidDistance(points[i], points[j]), distance2D(points[i], points[j]));
}
}
PrimAlgorithm.calculate(graph, 0);
int[] route = preorderWalk(graph, 0);
Result result = new Result(route, nieUmiemCSharpaWiecJestTaZmienna, nextDay);
return result;
}
public static SolveRequestMessage loadDataFromDisc(String filePath)
{
SolveRequestMessage solveRequestMessage;
StreamReader streamReader = new StreamReader(filePath);
string text = streamReader.ReadToEnd();
VRPParser benchmark = new VRPParser(text);
string problemType="";
byte[] data;
streamReader.Close();
String extension = Path.GetExtension(filePath);
if (extension == ".vrp")
{
problemType = "DVRP";
}
else
{
Console.WriteLine(">> Unsupported problem type. Please load a problem with one of the following problem types: \n *DVRP");
return null;
}
data = DataSerialization.ObjectToByteArray(benchmark);
// data = GetBytes(filePath);
solveRequestMessage = new SolveRequestMessage(problemType, data);
Console.WriteLine(" >> Success");
return solveRequestMessage;
}
public static VRPParser getBenchmark(String filePath)
{
StreamReader streamReader = new StreamReader(filePath);
string text = streamReader.ReadToEnd();
VRPParser benchmark = new VRPParser(text);
return benchmark;
}
public static void FullSolveTest(VRPParser benchmark)
{
/******************* DIVIDE *************************/
// Combine coords (x, y) and time_avail (z)
List<Point> data = new List<Point>();
for (int i = 0; i < benchmark.Num_Visits; i++)
{
List<double> point_coords = new List<double>();
// does not include depots - which is what we want
int loc_index = benchmark.Visit_Location[i];
point_coords.Add(benchmark.Location_Coord[loc_index][0]);
point_coords.Add(benchmark.Location_Coord[loc_index][1]);
point_coords.Add(benchmark.Time_Avail[loc_index - 1] + benchmark.Duration[loc_index - 1]);
data.Add(new Point(point_coords));
}
// get optimal number of clusters
PredictionStrength ps = new PredictionStrength(data);
ps.Compute(true);
int k = ps.BestK;
// compute clusters
KMeans clusters = new KMeans(data, k);
clusters.Compute();
// create k benchmarks for k solvers
VRPParser[] partial_benchmarks = new VRPParser[k];
for (int i = 0; i < k; i++)
{
VRPParser partial_benchmark = new VRPParser();
List<int> cluster_indecies = clusters.GetCluterIndecies(i);
/************ COMMON ****************/
int num_depots = benchmark.Num_Depots;
int num_visits = cluster_indecies.Count;
int num_locations = cluster_indecies.Count + num_depots;
partial_benchmark.Num_Visits = num_visits;
partial_benchmark.Num_Depots = num_depots;
partial_benchmark.Name = benchmark.Name;
partial_benchmark.Num_Capacities = benchmark.Num_Capacities;
partial_benchmark.Num_Vehicles = 1;
partial_benchmark.Capacites = benchmark.Capacites;
partial_benchmark.Depots_IDs = new int[benchmark.Depots_IDs.Length];
benchmark.Depots_IDs.CopyTo(partial_benchmark.Depots_IDs, 0);
partial_benchmark.Depot_Location = new int[benchmark.Depot_Location.Length];
benchmark.Depot_Location.CopyTo(partial_benchmark.Depot_Location, 0);
partial_benchmark.Depot_Time_Window = new int[benchmark.Depot_Time_Window.Length][];
for (int p = 0; p < partial_benchmark.Depot_Time_Window.Length; p++)
{
partial_benchmark.Depot_Time_Window[p] = new int[benchmark.Depot_Time_Window[p].Length];
benchmark.Depot_Time_Window[p].CopyTo(partial_benchmark.Depot_Time_Window[p], 0);
}
/************ LOCATION_COORD ****************/
partial_benchmark.Num_Locations = num_locations;
int[][] location_coord = new int[num_locations][];
// get all depots locations
for (int j = 0; j < num_depots; j++)
{
location_coord[j] = new int[2];
location_coord[j][0] = benchmark.Location_Coord[j][0];
location_coord[j][1] = benchmark.Location_Coord[j][1];
}
// get all partial clients locations
for (int j = num_depots; j < num_locations; j++)
{
location_coord[j] = new int[2];
int clientNodeIndex = benchmark.Visit_Location[cluster_indecies[j - num_depots]];
location_coord[j][0] = benchmark.Location_Coord[clientNodeIndex][0];
location_coord[j][1] = benchmark.Location_Coord[clientNodeIndex][1];
}
partial_benchmark.Location_Coord = location_coord;
/************ DEMAND ****************/
int[] demands = new int[num_visits];
for (int j = 0; j < num_visits; j++)
{
int clientNodeIndex = benchmark.Visit_Location[cluster_indecies[j]];
demands[j] = benchmark.Demands[clientNodeIndex - num_depots];
}
partial_benchmark.Demands = demands;
/************ VISIT_LOCATION ****************/
int[] visit_location = new int[num_visits];
for (int j = 0; j < num_visits; j++)
{
int clientNodeIndex = benchmark.Visit_Location[cluster_indecies[j]] - num_depots;
visit_location[j] = clientNodeIndex;
//visit_location[j] = j + num_depots;
}
partial_benchmark.Visit_Location = visit_location;
/************ DURATION ****************/
int[] duration = new int[num_visits];
for (int j = 0; j < num_visits; j++)
{
int clientNodeIndex = benchmark.Visit_Location[cluster_indecies[j]];
duration[j] = benchmark.Duration[clientNodeIndex - num_depots];
}
partial_benchmark.Duration = duration;
/************ TIME_AVAIL ****************/
int[] time_avail = new int[num_visits];
for (int j = 0; j < num_visits; j++)
{
int clientNodeIndex = benchmark.Visit_Location[cluster_indecies[j]];
time_avail[j] = benchmark.Time_Avail[clientNodeIndex - num_depots];
}
partial_benchmark.Time_Avail = time_avail;
partial_benchmarks[i] = partial_benchmark;
}
/******************* SOLVE *************************/
float CUT_OFF_COEFFICIENT = 0.2f;
List<Result> results = new List<Result>();
List<int> nextDay = new List<int>();
float cutOffTime = CUT_OFF_COEFFICIENT * benchmark.Depot_Time_Window[0][1];
for (int i = 0; i < partial_benchmarks.Length; i++)
{
results.Add(TSPTrianIneq.calculate(partial_benchmarks[i], cutOffTime));
}
/******************* MERGE *************************/
for(int j = 0; j < results.Count; j++)
{
for (int i = partial_benchmarks[j].Num_Depots; i < results[j].route.Length - partial_benchmarks[j].Num_Depots; i++)
results[j].route[i] = partial_benchmarks[j].Visit_Location[results[j].route[i] - partial_benchmarks[j].Num_Depots] + partial_benchmarks[j].Num_Depots;
}
for (int j = 0; j < results.Count; j++)
for (int i = 0; i < results[j].nextDay.Count; i++)
{
results[j].nextDay[i] = partial_benchmarks[j].Visit_Location[results[j].nextDay[i] - partial_benchmarks[j].Num_Depots] + partial_benchmarks[j].Num_Depots;
}
Console.Write("asd");
}
public override byte[][] DivideProblem(int threadCount)
{
/****************** DESERIALIZE ************************/
BinaryFormatter formatter = new BinaryFormatter();
VRPParser benchmark = (VRPParser)formatter.Deserialize(new MemoryStream(_problemData));
/******************* DIVIDE *************************/
// Combine coords (x, y) and time_avail (z)
List<Point> data = new List<Point>();
for (int i = 0; i < benchmark.Num_Visits; i++)
{
List<double> point_coords = new List<double>();
// does not include depots - which is what we want
int loc_index = benchmark.Visit_Location[i];
point_coords.Add(benchmark.Location_Coord[loc_index][0]);
point_coords.Add(benchmark.Location_Coord[loc_index][1]);
point_coords.Add(benchmark.Time_Avail[loc_index - 1] + benchmark.Duration[loc_index - 1]);
data.Add(new Point(point_coords));
}
// get optimal number of clusters
//PredictionStrength ps = new PredictionStrength(data);
//ps.Compute(true);
//int k = ps.BestK;
int max_k = 5;
int start_k = 1;
// prepare byte array for all partial solutions
int solutionsSize = 0;
for (int i = start_k; i <= max_k; i++)
solutionsSize += i;
int temporarySolutionIndex = 0;
byte[][] temporarySolution = new byte[solutionsSize][];
for (int k = start_k; k <= max_k; k++)
{
// compute clusters
KMeans clusters = new KMeans(data, k);
clusters.Compute();
// create k benchmarks for k solvers
VRPParser[] partial_benchmarks = new VRPParser[k];
for (int i = 0; i < k; i++)
{
VRPParser partial_benchmark = new VRPParser();
List<int> cluster_indecies = clusters.GetCluterIndecies(i);
partial_benchmark.ID = k;
/************ COMMON ****************/
int num_depots = benchmark.Num_Depots;
int num_visits = cluster_indecies.Count;
int num_locations = cluster_indecies.Count + num_depots;
partial_benchmark.Num_Visits = num_visits;
partial_benchmark.Num_Depots = num_depots;
partial_benchmark.Name = benchmark.Name;
partial_benchmark.Num_Capacities = benchmark.Num_Capacities;
partial_benchmark.Num_Vehicles = 1;
partial_benchmark.Capacites = benchmark.Capacites;
partial_benchmark.Depots_IDs = new int[benchmark.Depots_IDs.Length];
benchmark.Depots_IDs.CopyTo(partial_benchmark.Depots_IDs, 0);
partial_benchmark.Depot_Location = new int[benchmark.Depot_Location.Length];
benchmark.Depot_Location.CopyTo(partial_benchmark.Depot_Location, 0);
partial_benchmark.Depot_Time_Window = new int[benchmark.Depot_Time_Window.Length][];
for (int p = 0; p < partial_benchmark.Depot_Time_Window.Length; p++)
{
partial_benchmark.Depot_Time_Window[p] = new int[benchmark.Depot_Time_Window[p].Length];
benchmark.Depot_Time_Window[p].CopyTo(partial_benchmark.Depot_Time_Window[p], 0);
}
/************ LOCATION_COORD ****************/
partial_benchmark.Num_Locations = num_locations;
int[][] location_coord = new int[num_locations][];
// get all depots locations
for (int j = 0; j < num_depots; j++)
{
location_coord[j] = new int[2];
location_coord[j][0] = benchmark.Location_Coord[j][0];
location_coord[j][1] = benchmark.Location_Coord[j][1];
}
// get all partial clients locations
for (int j = num_depots; j < num_locations; j++)
{
location_coord[j] = new int[2];
int clientNodeIndex = benchmark.Visit_Location[cluster_indecies[j - num_depots]];
location_coord[j][0] = benchmark.Location_Coord[clientNodeIndex][0];
location_coord[j][1] = benchmark.Location_Coord[clientNodeIndex][1];
}
partial_benchmark.Location_Coord = location_coord;
/************ DEMAND ****************/
int[] demands = new int[num_visits];
for (int j = 0; j < num_visits; j++)
{
int clientNodeIndex = benchmark.Visit_Location[cluster_indecies[j]];
demands[j] = benchmark.Demands[clientNodeIndex - num_depots];
}
partial_benchmark.Demands = demands;
/************ VISIT_LOCATION ****************/
int[] visit_location = new int[num_visits];
for (int j = 0; j < num_visits; j++)
{
int clientNodeIndex = benchmark.Visit_Location[cluster_indecies[j]] - num_depots;
visit_location[j] = clientNodeIndex;
//visit_location[j] = j + num_depots;
}
partial_benchmark.Visit_Location = visit_location;
/************ DURATION ****************/
int[] duration = new int[num_visits];
for (int j = 0; j < num_visits; j++)
{
int clientNodeIndex = benchmark.Visit_Location[cluster_indecies[j]];
duration[j] = benchmark.Duration[clientNodeIndex - num_depots];
}
partial_benchmark.Duration = duration;
/************ TIME_AVAIL ****************/
int[] time_avail = new int[num_visits];
for (int j = 0; j < num_visits; j++)
{
int clientNodeIndex = benchmark.Visit_Location[cluster_indecies[j]];
time_avail[j] = benchmark.Time_Avail[clientNodeIndex - num_depots];
}
partial_benchmark.Time_Avail = time_avail;
partial_benchmarks[i] = partial_benchmark;
}
/************ SERIALIZATION ******************/
for (int i = 0; i < partial_benchmarks.Count(); i++)
{
temporarySolution[temporarySolutionIndex++] = DataSerialization.ObjectToByteArray(partial_benchmarks[i]);
}
}
return temporarySolution;
}
