public static Rollout[] Winner(Policy policy, Policy adversary, bool storeRollout = false)
{
Policy[] teamPolicies = new[] { policy, adversary };
return(WorldGenerator.AllMatchups().AsParallel().Select(matchup => {
World current = WorldGenerator.GenerateInitial(matchup.Team0, matchup.Team1);
// Debug.WriteLine("Simulating " + matchup.ToString());
List <RolloutTick> ticks = storeRollout ? new List <RolloutTick>() : null;
int?winner = null;
while (winner == null)
{
Dictionary <int, Tactic> heroTactics = storeRollout ? new Dictionary <int, Tactic>() : null;
Dictionary <int, GameAction> actions = new Dictionary <int, GameAction>();
Simulator.AddEnvironmentalActions(current, actions);
foreach (Unit unit in current.Units)
{
if (unit.UnitType == UnitType.Hero)
{
Tactic tactic = PolicyEvaluator.Evaluate(current, unit, teamPolicies[unit.Team]);
actions[unit.UnitId] = PolicyEvaluator.TacticToAction(current, unit, tactic);
heroTactics?.Add(unit.UnitId, tactic);
}
}
ticks?.Add(new RolloutTick {
HeroTactics = heroTactics,
World = current,
});
current = Simulator.Forward(current, actions);
winner = current.Winner();
}
double winRate;
if (winner == 0)
{
winRate = 1.0;
}
else if (winner == 1)
{
winRate = 0.0;
}
else
{
winRate = 0.5;
}
return new Rollout {
Matchup = matchup,
WinRate = winRate,
Ticks = ticks,
FinalWorld = storeRollout ? current : null,
FinalEvaluation = IntermediateEvaluator.Evaluate(current, 0),
};
}).ToArray());
}
private double IntermediateWinner(Rollout rollout)
{
double team0 = IntermediateEvaluator.Evaluate(rollout.FinalWorld, 0).Score;
double team1 = IntermediateEvaluator.Evaluate(rollout.FinalWorld, 1).Score;
if (team0 > team1)
{
return(1);
}
else if (team0 < team1)
{
return(0);
}
else
{
return(0.5);
}
}
private static PartialRollout GenerateRollout(
World current,
Policy[] policies,
int myTeam,
int myHeroId,
Tactic?initialTactic)
{
List <World> snapshots = new List <World> {
current
};
List <Episode> episodes = new List <Episode>();
for (int tick = 0; tick < NumLearningTicks + TicksForward; ++tick)
{
Dictionary <int, GameAction> actions = new Dictionary <int, GameAction>();
Simulator.AddEnvironmentalActions(current, actions);
foreach (Unit unit in current.Units)
{
if (unit.UnitType == UnitType.Hero)
{
Tactic tactic;
if (tick == 0 && unit.UnitId == myHeroId && initialTactic.HasValue)
{
tactic = initialTactic.Value;
}
else
{
tactic = PolicyEvaluator.Evaluate(current, unit, policies[unit.Team]);
}
if (unit.UnitId == myHeroId && tick < NumLearningTicks)
{
episodes.Add(new Episode {
World = current,
Hero = unit,
Tactic = tactic,
Weight = 1.0,
});
}
actions[unit.UnitId] = PolicyEvaluator.TacticToAction(current, unit, tactic);
}
}
current = Simulator.Forward(current, actions);
snapshots.Add(current);
}
List <IntermediateEvaluator.Evaluation> evaluations = snapshots.Select(world => IntermediateEvaluator.Evaluate(world, myTeam)).ToList();
return(new PartialRollout {
Episodes = episodes,
Evaluations = evaluations,
Score = DiscountedRewards(evaluations.Select(ev => ev.Score), DiscountRate),
});
}