private int Calculate(FightingUnit unitFrom, FightingUnit unitTo)
{
var battleDice = unitFrom.Attacking ? unitFrom.OffensiveDie : unitFrom.DefensiveDie;
var AC = unitTo.ArmorClass;
if (!unitTo.Attacking && unitTo.Action == Actions.shieldFormation && unitFrom.Unit.type == UnitTypes.ranged)
{
AC += 2;
}
else if (!unitTo.Attacking && unitTo.Action == Actions.defensiveStance)
{
AC += (unitTo.LeadershipBonus - 6) / 4;
}
else if (unitTo.Action == Actions.charge && unitTo.Attacking && unitTo.Unit.type == UnitTypes.infantry)
{
AC -= 3;
}
var toHit = unitFrom.ToHit;
if (!unitFrom.Attacking && unitFrom.Action == Actions.offensiveStance)
{
toHit++;
}
var damageMod = (unitFrom.Attacking && unitFrom.Action == Actions.charge && unitFrom.Unit.name != "Polearms") ? 1.5f : 1.0f;
if (unitFrom.Unit.name == "Polearms" && unitTo.Unit.type == UnitTypes.cavalry)
{
damageMod *= 2;
if (unitTo.Action == Actions.charge && unitTo.Attacking)
{
damageMod *= 2;
}
}
unitFrom.AttackRoll = unitFrom.AdvantageType switch
{
AdvantageType.Advantage => Math.Max(rand.Next(1, 21), rand.Next(1, 21)),
AdvantageType.Disadvantage => Math.Min(rand.Next(1, 21), rand.Next(1, 21)),
_ => rand.Next(1, 21)
};
var attackHit = unitFrom.AttackRoll + toHit;
var nat20 = unitFrom.AttackRoll == 20;
var ACdifferential = attackHit - AC;
if (ACdifferential <= -6 && !(unitFrom.Attacking && unitFrom.Unit.type == UnitTypes.cavalry && unitFrom.Action == Actions.charge))
{
battleDice.dieCount = 0;
}
else
{
battleDice.dieCount += (ACdifferential / 2);
}
var pool = DicePool.FromDice(battleDice);
if (nat20)
{
pool.flatBonus = battleDice.dieSides;
}
if (!unitFrom.Attacking && unitFrom.Unit.type == UnitTypes.artillery)
{
pool = new DicePool();
battleDice.dieCount = 0;
}
int totalDamage = 0;
for (int i = 0; i < unitFrom.UnitStrength; i++)
{
totalDamage += pool.CalculateDamage(rand);
}
if (unitFrom.Attacking)
{
unitFrom.OffensiveDie = battleDice;
}
else
{
unitFrom.DefensiveDie = battleDice;
}
unitTo.ArmorClass = AC;
unitFrom.ToHit = toHit;
unitFrom.DamageModifier = damageMod;
return((int)(totalDamage * damageMod));
}
}
