private static GunAmmoGroup[][] GetAmmoGroupings(GunGroup[][] gunCombos, IEnumerable<AmmoBox> boxes)
{
double smallestDemand = gunCombos[0].Min(o => o.DemandPerGun); // only need to look at one of the combos, because each combo has all guns
double smallestCaliber = gunCombos[0].Min(o => o.Caliber);
// Commit the boxes to an array that will be reused for each combination of guns
AmmoBox[] sortedBoxes = boxes.
Where(o => o.QuantityMax >= smallestDemand && Math1D.Min(o.ScaleActual.X, o.ScaleActual.Y, o.ScaleActual.Z) >= smallestCaliber). // only keep what will fit the smallest gun
OrderByDescending(o => o.QuantityMax). // order the boxes descending so that the largest gets assigned first
ToArray();
// Get the distance between each ammo box and each gun
Tuple<long, long, double>[] ammo_gun_distance = gunCombos[0].
SelectMany(o => o.Guns).
SelectMany(gun => sortedBoxes.Select(box => Tuple.Create(box.Token, gun.Token, (box.Position - gun.Position).Length))).
ToArray();
return gunCombos.
AsParallel().
Select(o => GetAmmoGroupings_Assign(o, sortedBoxes, ammo_gun_distance)). // Assign all the boxes to this arrangment of guns
ToArray();
}
