private int filterDomain(JolkaVariable variable)
{
int valuesRemoved = 0;
variable.ResetDomain();//Domain = GetWordsWithLength(variable.EndIndex - variable.BeginIndex + 1);
if (variable.Horizontal)
{
foreach (JolkaConstraint cons in Constraints[variable])
{
if (!cons.VerticalVariable.IsEmpty())
{
valuesRemoved += variable.Domain.RemoveAll(word => word[cons.PosHorizontal] != cons.VerticalVariable.Word[cons.PosVertical]);
}
}
}
else
{
foreach (JolkaConstraint cons in Constraints[variable])
{
if (!cons.HorizontalVariable.IsEmpty())
{
valuesRemoved += variable.Domain.RemoveAll(word => word[cons.PosVertical] != cons.HorizontalVariable.Word[cons.PosHorizontal]);
}
}
}
return(valuesRemoved);
}
public JolkaConstraint(ref JolkaVariable horizontalVar, ref JolkaVariable verticalVar,
int row, int col)
{
HorizontalVariable = horizontalVar;
VerticalVariable = verticalVar;
PosVertical = row - VerticalVariable.BeginIndex;
PosHorizontal = col - HorizontalVariable.BeginIndex;
}
public JolkaVariable(JolkaVariable other)
{
Word = other.Word;
Horizontal = other.Horizontal;
SectionNum = other.SectionNum;
BeginIndex = other.BeginIndex;
EndIndex = other.EndIndex;
Domain = other.Domain;
OrderedDomain = other.OrderedDomain;
}
private void AddConstraint(int i, int j)
{
JolkaVariable horizontalVar = Variables.
First(v => (v.Horizontal && v.SectionNum == i && v.BeginIndex <= j && v.EndIndex >= j));
JolkaVariable verticalVar = Variables.
First(v => (!v.Horizontal && v.SectionNum == j && v.BeginIndex <= i && v.EndIndex >= i));
JolkaConstraint constraint = new JolkaConstraint(ref horizontalVar, ref verticalVar, i, j);
Constraints[horizontalVar].Add(constraint);
Constraints[verticalVar].Add(constraint);
}
private bool CheckConstraints(JolkaVariable currElem)
{
foreach (JolkaConstraint constraint in Constraints[currElem])
{
if (!constraint.isMet())
{
return(false);
}
}
return(true);
}
private JolkaVariable SelectNextVariableMRV()
{
if (BackTrack)
{
JolkaVariable nextVar = null;
int minRemainingValues = int.MaxValue;
foreach (JolkaVariable variable in Variables)
{
if (variable.IsEmpty())
{
int excludedValuesCount = 0;
foreach (JolkaConstraint cons in Constraints[variable])
{
JolkaVariable related;
if (variable.Horizontal)
{
related = cons.VerticalVariable;
}
else
{
related = cons.HorizontalVariable;
}
if (!related.IsEmpty())
{
foreach (string word in variable.Domain)
{
variable.Word = word;
if (!cons.isMet())
{
excludedValuesCount++;
}
}
}
if (variable.Domain.Count - excludedValuesCount < minRemainingValues)
{
minRemainingValues = variable.Domain.Count - excludedValuesCount;
nextVar = variable;
}
variable.Word = "";
}
}
}
return(nextVar);
}
else
{
return(Variables.OrderBy(v => v.Domain.Count).FirstOrDefault(v => v.IsEmpty()));
}
}
private void ResetDomainsOfAllRelatedVariables(JolkaVariable currElem)
{
JolkaVariable related;
foreach (JolkaConstraint cons in Constraints[currElem])
{
if (currElem.Horizontal)
{
related = cons.VerticalVariable;
}
else
{
related = cons.HorizontalVariable;
}
related.ResetDomain();//Domain = GetWordsWithLength(related.EndIndex - related.BeginIndex + 1);
}
}
public void WriteVariable(JolkaVariable variable)
{
if (variable.Horizontal)
{
for (int i = 0; i < variable.Word.Length; i++)
{
Fields[variable.SectionNum][variable.BeginIndex + i] = variable.Word[i];
}
}
else
{
for (int i = 0; i < variable.Word.Length; i++)
{
Fields[variable.BeginIndex + i][variable.SectionNum] = variable.Word[i];
}
}
}
private void OrderDomain(JolkaVariable variable)
{
int valuesRemoved = 0;
Dictionary <string, int> valuesRemovedByEachWord = new Dictionary <string, int>();
foreach (string word in variable.Domain)
{
variable.Word = word;
valuesRemoved = FilterDomainsOfAllRelatedVariables(variable);
variable.Word = "";
ResetDomainsOfAllRelatedVariables(variable);
//if (Variables.Any(v => v.Word == word))
// valuesRemoved += 1000;
valuesRemovedByEachWord.Add(word, valuesRemoved);
}
variable.OrderedDomain = variable.OrderedDomain.OrderBy(w => valuesRemovedByEachWord[w]).ToList();
variable.ResetDomain();
}
private int FilterDomainsOfAllRelatedVariables(JolkaVariable currElem)
{
JolkaVariable related;
int valuesRemoved = 0;
foreach (JolkaConstraint cons in Constraints[currElem])
{
if (currElem.Horizontal)
{
related = cons.VerticalVariable;
}
else
{
related = cons.HorizontalVariable;
}
if (related.IsEmpty())
{
valuesRemoved += filterDomain(related);
}
}
return(valuesRemoved);
}
public void RunForwardChecking()
{
if (firstRun)
{
StartTiming();
}
JolkaVariable currElem = SelectNextVariable();
if (currElem == null) //znaleziono rozwiązanie
{
if (Solutions.Count == 0)
{
SaveFirstSolutionData();
}
Solutions.Add(Variables.Select(v => new JolkaVariable(v)).ToList());
}
else
{
foreach (string value in currElem.Domain)//.Except(UsedWords))
{
currElem.Word = value;
TotalNodesVisited++;
FilterDomainsOfAllRelatedVariables(currElem);
if (!IsAnyDomainEmpty())
{
RunForwardChecking();
}
}
currElem.Word = ""; //Nawrót - brak kolejnej wartosci
FilterDomainsOfAllRelatedVariables(currElem);
}
TotalReturns++;
TotalTime = stopwatch.Elapsed.TotalSeconds;
}
public void RunBacktracking()
{
if (firstRun)
{
BackTrack = true;
StartTiming();
}
JolkaVariable currElem = SelectNextVariable();
if (currElem == null) //znaleziono rozwiązanie
{
if (Solutions.Count == 0)
{
SaveFirstSolutionData();
}
Solutions.Add(Variables.Select(v => new JolkaVariable(v)).ToList());
}
else
{
foreach (string value in currElem.Domain)//.Except(UsedWords))
{
currElem.Word = value;
TotalNodesVisited++;
bool correct = CheckConstraints(currElem);
if (correct)
{
RunBacktracking();
}
}
currElem.Word = "";
}
TotalReturns++;//Nawrót - brak kolejnej wartosci
TotalTime = stopwatch.Elapsed.TotalSeconds;
}