/// <summary>
/// Gives quantity from giver to receiver without exchanging the entities.
/// </summary>
public static bool TryGiveQuantity(GameContext context, int[] receiverIds, int[] giverIds)
{
Log("TryGiveQuantity");
bool gaveAnything = false;
GameEntity[] giverEntities = GameLinkUtils.GetEntitiesWithIds(context, giverIds);
foreach (GameEntity giverEntity in giverEntities)
{
int giftId = GetNextOccupantId(giverEntity.receiver);
if (giftId == kEmpty)
{
continue;
}
GameEntity gift = context.GetEntityWithId(giftId);
DebugUtil.Assert(gift != null,
"ReceiverUtils.TryOccupy: Expected gift was not null. Gift ID=" + giftId);
if (gift == null)
{
continue;
}
if (!gift.hasQuantity || gift.quantity.value == 0)
{
continue;
}
foreach (int receiverId in receiverIds)
{
GameEntity receiver = context.GetEntityWithId(receiverId);
ReceiverComponent component = receiver.receiver;
if (!Filter(component, gift))
{
continue;
}
if (!receiver.hasQuantity)
{
continue;
}
receiver.ReplaceQuantity(receiver.quantity.value + gift.quantity.value);
gift.ReplaceQuantity(0);
gaveAnything = true;
break;
}
}
return(gaveAnything);
}
/// <summary>
/// Receiver might be an input or an output of a transmitter.
/// As in a Petri Net, only transmits if all receivers are occupied.
/// Unlike a Petri Net, only transmits if to outputs with an empty occupant position.
/// Also unlike a Petri Net, preserves the input entity if it would be a suitable output.
///
/// Expects each input and output has a receiver, or else Entitas throws an exception.
/// </summary>
///
/// <param name="giverIds">
/// Selects first acceptable giver or gift in that giver's receiver. Sets that giver ID to empty if selected.
/// </param>
public static void TryOccupy(GameContext context, int[] receiverIds, int[] giverIds)
{
Log("TryOccupy");
GameEntity[] giverEntities = GameLinkUtils.GetEntitiesWithIds(context, giverIds);
foreach (GameEntity giverEntity in giverEntities)
{
int giftId = GetNextOccupantId(giverEntity.receiver);
if (giftId == kEmpty)
{
continue;
}
RemoveOccupant(giverEntity, giftId);
GameEntity gift = context.GetEntityWithId(giftId);
DebugUtil.Assert(gift != null,
"ReceiverUtils.TryOccupy: Expected gift was not null. Gift ID=" + giftId);
if (gift == null)
{
continue;
}
foreach (int receiverId in receiverIds)
{
GameEntity receiver = context.GetEntityWithId(receiverId);
ReceiverComponent component = receiver.receiver;
if (IsFull(component))
{
continue;
}
if (Filter(component, giverEntity))
{
AddOccupant(receiver, giverEntity.id.value);
break;
}
if (Filter(component, gift))
{
AddOccupant(receiver, giftId);
break;
}
}
}
}