private static void TestResidualNetwork()
{
//Create graph from Figure 6.10
FlowNetwork fn = new FlowNetwork();
Vertex v1 = new Vertex();
Vertex v2 = new Vertex();
Vertex v3 = new Vertex();
Vertex v4 = new Vertex();
fn.AddVertex(v1);
fn.AddVertex(v2);
fn.AddVertex(v3);
fn.AddVertex(v4);
fn.SetSource(v1);
fn.SetSink(v4);
fn.AddEdge(new FlowEdge(v1, v3, 3, 4));
fn.AddEdge(new FlowEdge(v1, v2, 2, 2));
fn.AddEdge(new FlowEdge(v2, v3, 2, 3));
fn.AddEdge(new FlowEdge(v3, v4, 5, 5));
fn.AddEdge(new FlowEdge(v2, v4, 0, 1));
Graph g = GraphAlgorithms.CreateResidualNetwork(fn);
}
private static void TestMaxFlow()
{
FlowNetwork fn = new FlowNetwork();
Vertex v1 = new Vertex();
Vertex v2 = new Vertex();
Vertex v3 = new Vertex();
Vertex v4 = new Vertex();
Vertex v5 = new Vertex();
Vertex v6 = new Vertex();
fn.AddVertex(v1);
fn.AddVertex(v2);
fn.AddVertex(v3);
fn.AddVertex(v4);
fn.AddVertex(v5);
fn.AddVertex(v6);
fn.SetSource(v1);
fn.SetSink(v6);
fn.AddEdge(new FlowEdge(v1, v2, 0f, 2f));
fn.AddEdge(new FlowEdge(v1, v3, 0f, 2f));
fn.AddEdge(new FlowEdge(v2, v4, 0f, 2f));
fn.AddEdge(new FlowEdge(v3, v4, 1f, 2f));
fn.AddEdge(new FlowEdge(v3, v5, 0f, 2f));
fn.AddEdge(new FlowEdge(v4, v6, 1f, 2f));
fn.AddEdge(new FlowEdge(v5, v6, 0f, 2f));
//float maxFlow = GraphAlgorithms.MaximumFlow(fn);
//Console.WriteLine("Max flow is " + maxFlow);
}
private FlowNetwork FromFn(FileInfo file)
{
FlowNetwork g = new FlowNetwork();
int source = -1, target = -1;
try
{
System.IO.StreamReader fs =
new System.IO.StreamReader(file.FullName);
string line;
while ((line = fs.ReadLine()) != null)
{
if (line.StartsWith("SOURCE"))
{
var s = line.Split(':');
source = int.Parse(s[1]) - 1;
}
if (line.StartsWith("TARGET"))
{
var s = line.Split(':');
target = int.Parse(s[1]) - 1;
}
if (char.IsLetter(line[0]))
{
continue;
}
var d = line.Split(new char[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
int n0 = int.Parse(d[0]) - 1; // My numbering starts with 0, not 1
if (n0 == -2)
{
break;
}
int n1 = int.Parse(d[1]) - 1; // My numbering starts with 0, not 1
int w = int.Parse(d[2]); // weight
g.AddEdge(n0, n1, w);
}
}
catch (Exception ex)
{
Log.Write(ex.Message, Log.ERROR);
}
g.Source = source;
g.Target = target;
var validation = g.Validate();
if (validation.Count > 0)
{
foreach (var error in validation)
{
Log.Write(error, Log.ERROR);
}
return(null);
}
return(g);
}
private FlowNetwork FromDimac(FileInfo file)
{
FlowNetwork g = new FlowNetwork();
var srs = -1;
var trg = -1;
try
{
System.IO.StreamReader fs =
new System.IO.StreamReader(file.FullName);
string line;
while ((line = fs.ReadLine()) != null)
{
if (line.EndsWith("s"))
{
var s = line.Split(' ');
srs = int.Parse(s[1]) - 1;
}
if (line.EndsWith("t"))
{
var t = line.Split(' ');
trg = int.Parse(t[1]) - 1;
}
if (line.StartsWith("a"))
{
var a = line.Split(' ');
int from = int.Parse(a[1]) - 1;
int to = int.Parse(a[2]) - 1;
int weight = int.Parse(a[3]);
g.AddEdge(from, to, weight);
}
}
}
catch (Exception ex)
{
Log.Write(ex.Message, Log.ERROR);
}
g.Source = srs;
g.Target = trg;
var validation = g.Validate();
if (validation.Count > 0)
{
foreach (var error in validation)
{
Log.Write(error, Log.ERROR);
}
return(null);
}
return(g);
}
private FlowNetwork FromCSV(FileInfo file)
{
FlowNetwork g = new FlowNetwork();
int source = -1, target = -1;
using (TextFieldParser parser = new TextFieldParser(file.FullName))
{
parser.TextFieldType = FieldType.Delimited;
parser.SetDelimiters(",");
int line = 0;
while (!parser.EndOfData)
{
string[] fields = parser.ReadFields();
line++;
if (line == 1)
{
//skip header
continue;
}
if (line == 2)
{
int.TryParse(fields[0], out source);
int.TryParse(fields[1], out target);
//parse source and target
continue;
}
//Process row
int from, to;
double capacity;
int.TryParse(fields[0], out from);
int.TryParse(fields[1], out to);
double.TryParse(fields[2], out capacity);
g.AddEdge(from, to, capacity);
}
}
g.Source = source;
g.Target = target;
var validation = g.Validate();
if (validation.Count > 0)
{
foreach (var error in validation)
{
Log.Write(error, Log.ERROR);
}
return(null);
}
return(g);
}
void CriarNodos()
{
List <string> arquivoLido = new List <string>(LerAqruivo().Split(default(string[]), StringSplitOptions.RemoveEmptyEntries));
List <int> numerosLidos = new List <int>();
for (int i = 0; i < arquivoLido.Count; i++)
{
numerosLidos.Add(Int32.Parse(arquivoLido[i]));
}
for (int i = 0; i < numerosLidos.Count; i = i + 3)
{
//print(numerosLidos[i]);
bool novo;
GameObject nodo;
if (GameObject.Find("Nodo " + numerosLidos[i].ToString()) == null)
{
nodo = Instantiate(nodoPrefab, transform.position, Quaternion.identity, transform);
novo = true;
}
else
{
nodo = GameObject.Find("Nodo " + numerosLidos[i].ToString());
novo = false;
}
Nodo nodoScript = nodo.GetComponent <Nodo>();
nodoScript.numero = numerosLidos[i];
nodoScript.gameObject.name = "Nodo " + numerosLidos[i].ToString();
Conexao conexao = Instantiate(conexaoPrefab);
conexao.transform.SetParent(nodo.transform);
conexao.origem = numerosLidos[i];
conexao.destino = numerosLidos[i + 1];
conexao.custo = numerosLidos[i + 2];
nodoScript.conexoes.Add(conexao);
if (novo)
{
nodos.Add(nodoScript);
}
}
print("numero de nodos na lista: " + nodos.Count);
int numeroDeConexoes = 0;
foreach (Nodo nodo in nodos)
{
foreach (Conexao conexao in nodo.conexoes)
{
numeroDeConexoes++;
}
}
print(numeroDeConexoes);
FlowNetwork flowNetwork = new FlowNetwork(numeroDeConexoes);
foreach (Nodo nodo in nodos)
{
foreach (Conexao conexao in nodo.conexoes)
{
flowNetwork.AddEdge(new FlowEdge(nodo.numero, conexao.destino, conexao.custo));
}
}
FordFulkerson fordFulkerson = new FordFulkerson(flowNetwork, 1, 99);
print(fordFulkerson.Value);
}