protected void InventoryItemSetup(ShopFilling filling)
{
FillShopInventoryWithEmptyItem();
int items = Game.random.Next(GetLowerFillLimit(filling), GetUpperFillLimit(filling));
for (int n = 0; n < items; n++)
{
if (n < mandatoryShipItems.Count)
{
ShopInventoryEntry entry = mandatoryShipItems[n];
ShipPart part = RetrievePartFromEnum(entry.ShipPartType, Game);
part.SetShipPartVariety(entry.ItemVariety);
InsertPartAt(part, n);
}
else if (!inventoryIsFixed)
{
ShipPart part = ExtractShipPartFromItemFrequencies();
InsertPartAt(part, n);
}
}
}
private ShipPart ExtractShipPartFromItemFrequencies()
{
ShipPart part = null;
int summedItemFrequency = 0;
// Stores an accumulated value for each ship part
// The size of the ship parts range to previous value determines its probability for creation
SortedDictionary <String, int> probabilityTable = new SortedDictionary <String, int>();
foreach (ShopInventoryEntry entry in shopInventoryEntries)
{
switch (entry.Availability)
{
case ShipPartAvailability.rare:
{
summedItemFrequency += 1;
probabilityTable.Add(entry.GetId(), summedItemFrequency);
break;
}
case ShipPartAvailability.uncommon:
{
summedItemFrequency += 2;
probabilityTable.Add(entry.GetId(), summedItemFrequency);
break;
}
case ShipPartAvailability.common:
{
summedItemFrequency += 3;
probabilityTable.Add(entry.GetId(), summedItemFrequency);
break;
}
case ShipPartAvailability.ubiquitous:
{
summedItemFrequency += 4;
probabilityTable.Add(entry.GetId(), summedItemFrequency);
break;
}
default:
{
throw new ArgumentException("Not implemented!");
}
}
}
int randItemValue = Game.random.Next(summedItemFrequency);
foreach (KeyValuePair <String, int> pair in probabilityTable.OrderBy(key => key.Value))
{
if (pair.Value > randItemValue)
{
ShopInventoryEntry entry = new ShopInventoryEntry(pair.Key);
part = RetrievePartFromEnum(entry.ShipPartType, Game);
part.SetShipPartVariety(entry.ItemVariety);
break;
}
}
return(part);
}