public AttackResult SimulateAttack(ArmyComposition attackingForce, ArmyComposition defendingForce, uint trials)
{
var outcomes = new ConcurrentDictionary <short, uint>();
// Random isn't thread safe so don't parallelize
// Parallel.For(0, trials, (i) =>
for (int i = 0; i < trials; i++)
{
outcomes.AddOrUpdate(RunTrial(attackingForce, defendingForce), 1, (s, u) => u + 1);
}
//);
var ret = new AttackResult()
{
Trials = trials,
AttackingArmy = attackingForce,
DefendingArmy = defendingForce,
};
var wins = 0u;
foreach (var outcome in outcomes)
{
ret.AllOutcomeChances.Add(outcome.Key, ((double)outcome.Value) / trials);
if (outcome.Key > 0)
{
wins += outcome.Value;
}
}
ret.SuccessChance = ((double)wins) / trials;
return(ret);
}
private short RunTrial(ArmyComposition attackingForce, ArmyComposition defendingForce)
{
var atkRemaining = attackingForce.Size;
var defRemaining = defendingForce.Size;
while (atkRemaining > 0 && defRemaining > 0)
{
var atkRolls = new List <byte>(3);
var defRolls = new List <byte>(2);
for (int i = 0; i < Math.Min((short)3, atkRemaining); i++)
{
atkRolls.Add((byte)numGen.Next(6));
}
for (int i = 0; i < Math.Min((short)2, defRemaining); i++)
{
defRolls.Add((byte)numGen.Next(6));
}
var numToCompare = Math.Min(atkRolls.Count, defRolls.Count);
var modAtkRolls = atkRolls.OrderByDescending(b => b).Take(numToCompare).Select(b => (sbyte)b).ToArray();
var modDefRolls = defRolls.OrderByDescending(b => b).Take(numToCompare).Select(b => (sbyte)b).ToArray();
modAtkRolls[0] += attackingForce.HighestModifier;
modDefRolls[0] += defendingForce.HighestModifier;
modAtkRolls[numToCompare - 1] += attackingForce.LowestModifier;
modDefRolls[numToCompare - 1] += defendingForce.LowestModifier;
for (int i = 0; i < numToCompare; i++)
{
if (modAtkRolls[i] + attackingForce.AllModifier > modDefRolls[i] + defendingForce.AllModifier)
{
defRemaining--;
}
else
{
atkRemaining--;
}
}
}
return((short)(atkRemaining - defRemaining));
}
