public ExecutionResult Execute(SuperMetroidModel model, InGameState inGameState, int times = 1, bool usePreviousRoom = false)
{
bool enemyInitiallyFull = EnemyWithHealth.Health == EnemyWithHealth.Enemy.Hp;
EnemyWithHealth.Enemy.WeaponSusceptibilities.TryGetValue(Weapon.Name, out WeaponSusceptibility susceptibility);
if (susceptibility == null)
{
return(null);
}
int numberOfShots = susceptibility.NumberOfHits(EnemyWithHealth.Health);
ExecutionResult result = Weapon.ShotRequires.Execute(model, inGameState, times: times * numberOfShots, usePreviousRoom: usePreviousRoom);
if (result != null)
{
// Record the kill
// If the enemy was full, then the prior splash attack (if any) didn't affect it. Ignore it.
if (enemyInitiallyFull)
{
result.AddKilledEnemy(EnemyWithHealth.Enemy, Weapon, numberOfShots);
}
// If the enemy was not full, the splash attack contributed to its death
else
{
result.AddKilledEnemy(EnemyWithHealth.Enemy, new [] { (PriorSplashWeapon, PriorSplashShots), (Weapon, numberOfShots) });
public ExecutionResult Execute(SuperMetroidModel model, InGameState inGameState, int times = 1, bool usePreviousRoom = false)
{
ExecutionResult result = null;
// We'll need to track the health of individual enemies, so create an EnemyWithHealth for each
IEnumerable <EnemyWithHealth> enemiesWithHealth = EnemyGroup.Select(e => new EnemyWithHealth(e));
// If using a splash weapon, spend the ammo then apply the damage
if (SplashWeapon != null && SplashWeapon.HitsGroup)
{
result = SplashWeapon.ShotRequires.Execute(model, inGameState, times: times * SplashShots, usePreviousRoom: usePreviousRoom);
// If we can't spend the ammo, fail immediately
if (result == null)
{
return(null);
}
// Apply the splash attack to each enemy
enemiesWithHealth = enemiesWithHealth
.Select(e =>
{
e.Enemy.WeaponSusceptibilities.TryGetValue(SplashWeapon.Name, out WeaponSusceptibility susceptibility);
// If the splash weapon hurts the enemy, apply damage
if (susceptibility != null)
{
int damage = susceptibility.DamagePerShot * SplashShots;
e.Health -= damage;
}
// Return the new state of the enemy.
if (e.IsAlive())
{
return(e);
}
// If the enemy is dead, record the kill and return null
else
{
// No matter how many shots we dealt to the group, record how many shots it took to actually kill this enemy.
result.AddKilledEnemy(e.Enemy, SplashWeapon, susceptibility.Shots);
return(null);
}
})
// Remove dead enemies
.Where(e => e != null);
}
// No else: If no splashWeapon is provided (or it's somehow not a splash weapon), skip that step and only do the individual kill
// Iterate over each remaining enemy, killing it with the cheapest non-splash weapon
foreach (EnemyWithHealth currentEnemy in enemiesWithHealth)
{
var(_, killResult) = model.ExecuteBest(NonSplashWeapons.Select(weapon => currentEnemy.ToExecutable(weapon, SplashWeapon, SplashShots)),
result?.ResultingState ?? inGameState, times: times, usePreviousRoom: usePreviousRoom);
// If we can't kill one of the enemies, give up
if (killResult == null)
{
return(null);
}
// Update the sequential ExecutionResult
result = result == null ? killResult : result.ApplySubsequentResult(killResult);
}
return(result);
}
public override ExecutionResult Execute(SuperMetroidModel model, InGameState inGameState, int times = 1, bool usePreviousRoom = false)
{
// Create an ExecutionResult immediately so we can record free kills in it
ExecutionResult result = new ExecutionResult(inGameState.Clone());
// Filter the list of valid weapons, to keep only those we can actually use right now
IEnumerable <Weapon> usableWeapons = ValidWeapons.Where(w => w.UseRequires.Execute(model, inGameState, times: times, usePreviousRoom: usePreviousRoom) != null);
// Find all usable weapons that are free to use. That's all weapons without an ammo cost, plus all weapons whose ammo is farmable in this EnemyKill
// Technically if a weapon were to exist with a shot cost that requires something other than ammo (something like energy or ammo drain?),
// this wouldn't work. Should that be a worry?
IEnumerable <Weapon> freeWeapons = usableWeapons.Where(w => !w.ShotRequires.LogicalElements.Where(le => le is Ammo ammo && !FarmableAmmo.Contains(ammo.AmmoType)).Any());
// Remove all enemies that can be killed by free weapons
IEnumerable <IEnumerable <Enemy> > nonFreeGroups = GroupedEnemies
.RemoveEnemies(e =>
{
// Look for a free usable weapon this enemy is susceptible to.
var firstWeaponSusceptibility = e.WeaponSusceptibilities.Values
.Where(ws => freeWeapons.Contains(ws.Weapon, ObjectReferenceEqualityComparer <Weapon> .Default))
.FirstOrDefault();
// If we found a weapon, record a kill and return true (to remove the enemy)
if (firstWeaponSusceptibility != null)
{
result.AddKilledEnemy(e, firstWeaponSusceptibility.Weapon, firstWeaponSusceptibility.Shots);
return(true);
}
// If we didn't find a weapon, return false (to retain the enemy)
else
{
return(false);
}
});
// If there are no enemies left, we are done!
if (!nonFreeGroups.Any())
{
return(result);
}
// The remaining enemies require ammo
IEnumerable <Weapon> nonFreeWeapons = usableWeapons.Except(freeWeapons, ObjectReferenceEqualityComparer <Weapon> .Default);
IEnumerable <Weapon> nonFreeSplashWeapons = nonFreeWeapons.Where(w => w.HitsGroup);
IEnumerable <Weapon> nonFreeIndividualWeapons = nonFreeWeapons.Where(w => !w.HitsGroup);
// Iterate over each group, killing it and updating the resulting state.
// We'll test many scenarios, each with 0 to 1 splash weapon and a fixed number of splash weapon shots (after which enemies are killed with single-target weapons).
// We will not test multiple combinations of splash weapons.
foreach (IEnumerable <Enemy> currentEnemyGroup in nonFreeGroups)
{
// Build a list of combinations of splash weapons and splash shots (including one entry for no splash weapon at all)
IEnumerable <(Weapon splashWeapon, int splashShots)> splashCombinations = nonFreeSplashWeapons.SelectMany(w =>
// Figure out what different shot counts for this weapon will lead to different numbers of casualties
currentEnemyGroup
.Select(e => e.WeaponSusceptibilities.TryGetValue(w.Name, out WeaponSusceptibility susceptibility) ? susceptibility.Shots : 0)
.Where(shots => shots > 0)
// Convert each different number of shot into a combination of this weapon and the number of shots
.Select(shots => (splashWeapon: w, splashShots: shots))
)
// Add the one entry for not using a splash weapon at all
.Append((splashWeapon: null, splashShots: 0));
// Evaluate all combinations and apply the cheapest to our current resulting state
(_, ExecutionResult killResult) = model.ExecuteBest(splashCombinations.Select(combination => new EnemyGroupAmmoExecutable(currentEnemyGroup, nonFreeIndividualWeapons, combination.splashWeapon, combination.splashShots)),
result.ResultingState, times: times, usePreviousRoom: usePreviousRoom);
// If we failed to kill an enemy group, we can't kill all enemies
if (killResult == null)
{
return(null);
}
// Update the sequential ExecutionResult
result = result.ApplySubsequentResult(killResult);
}
return(result);
}