/// <summary>
/// Extract a snapshot from the constraint network.
/// </summary>
/// <param name="constraintNetwork">Constraint network.</param>
/// <param name="solutionSnapshot">Solution snapshot.</param>
/// <returns>True if a snapshot was extracted, False if the snapshot could not be extracted.</returns>
internal bool ExtractFrom(ConstraintNetwork constraintNetwork, out SolutionSnapshot solutionSnapshot)
{
_constraintNetwork = constraintNetwork;
var solverVariables = constraintNetwork.GetSolverVariables();
var assignment = new SnapshotLabelAssignment(solverVariables);
_variables = new List <VariableBase>(constraintNetwork.GetVariables());
var status = Backtrack(0, assignment, constraintNetwork);
solutionSnapshot = status ? ConvertSnapshotFrom(assignment, constraintNetwork) : SolutionSnapshot.Empty;
return(status);
}
private bool AllVariablesTested(int variableIndex)
{
return(variableIndex + 1 >= _constraintNetwork.GetVariables().Count);
}