public Tuple <SolutionParameters, Searchspace, double> CreateRandom()
{
for (int i = 0; i < 32; i++)
{
var guess = SolutionParameters.FromFactory(_random.Next(10, 28), _random.Next(10, 28), Factory);
try
{
var solution = GenerateSolution(guess);
var cost = Grader.CostForSolution(solution);
return(new Tuple <SolutionParameters, Searchspace, double>(guess, solution, cost));
}
catch (InvalidOperationException) { }
catch (IndexOutOfRangeException) { }
}
return(null);
}
public double Step()
{
var mutations = _pool.Select((parent) =>
{
try
{
var child = parent.Item1.Modify(Temperature);
var solution = GenerateSolution(child);
var cost = Grader.CostForSolution(solution);
return(new Tuple <SolutionParameters, Searchspace, double>(child, solution, cost));
}
catch (InvalidOperationException) { }
catch (IndexOutOfRangeException) { }
return(new Tuple <SolutionParameters, Searchspace, double>(null, new Searchspace(), -1));
}).Where((g) => g.Item1 != null);
var additions = Enumerable.Range(0, 2).Select((i) => CreateRandom());
var newPool = _pool.Concat(mutations).Concat(additions).OrderBy((g) => g.Item3);
_pool = newPool.Take(10).ToList();
var best = _pool.OrderBy((g) => g.Item3).First();
BestParameters = best.Item1;
BestState = best.Item2;
LowestCost = best.Item3;
var iterBest = additions.Concat(mutations).OrderBy((g) => g.Item3).First();
Temperature *= 0.5;
if (Temperature < 0.02)
{
Temperature = 1;
}
return(iterBest.Item3);
}
