public Organism(Solver solver, Problem problem)
{
this.solver = solver;
this.problem = problem;
root = new InspirationalBranch(solver)
{
LeftNode = new InspirationalBranch(solver), RightNode = new InspirationalBranch(solver)
};
lastEvaluation = new EvaluationState();
Solution = Evaluate(root, lastEvaluation, problem);
}
public void Tick()
{
InspirationalBranch clone = null;
clone = (InspirationalBranch)root.Clone(solver);
clone.Mutate();
var stateNew = new EvaluationState();
var newResult = Evaluate(clone, stateNew, problem);
if (newResult.CostTotal < Solution.CostTotal || solver.RandomHelper.Mutate(10))
{
root = clone;
Solution = newResult;
lastEvaluation = stateNew;
cachedNames = null;
}
}
private static SolutionInformation Evaluate(InspirationalBranch root, EvaluationState state, Problem problem)
{
root.Evaluate(state);
var cost = new SolutionInformation();
// Add the total inspiration cost
cost.InspirationTotal += state.Inspiration;
cost.DiffTotal += state.Diff;
// Add extra cost for incomplete solutions
foreach (var needed in problem.Proficiencies)
{
cost.IncompletenessPenalty += Math.Max(0d, needed.Value - state.GetValue(needed.Key)) * 1000;
}
cost.CostTotal = cost.InspirationTotal + cost.IncompletenessPenalty;
return(cost);
}
