public bool RunPlanner()
{
GOAPAction currentAction = FindNextAction();
// we can't find any valid actions, exit completely (in a real game we would 'idle').
if (currentAction == null)
{
return(false);
}
// execute task
foreach (var v in currentAction.GetEffects())
{
if (v.GetAgent() == null)
{
v.SetAgent(this);
}
// run the effect on the owner
v.Evaluate();
}
mEnergy -= currentAction.mCost;
return(true);
}
public void AddAction(GOAPAction a)
{
if (a.mAgent == null)
{
a.mAgent = this;
}
// for all preconditions and effects, set agent to this one
mActions.Add(a);
Console.WriteLine("[AddAction] \"{0}\"", a);
}
List <GOAPAction> mActions = new List <GOAPAction>(); // should be prio queue
public GOAPAction FindNextAction()
{
if (mActions.Count() == 0)
{
return(null);
}
// get lowest energy, valid task
GOAPAction currentAction = mActions[0];
GOAPAction replenish = mActions[0];
foreach (GOAPAction a in mActions)
{
if (a.AreAllPrerequisitesSatisfied() && a.mCost < currentAction.mCost)
{
if (a.mCost > 0)
{
currentAction = a;
}
else
{
replenish = a;
}
}
}
if (currentAction == null)
{
Console.WriteLine("[Agent] [RunPlanner] Info=\"No available tasks\"");
return(null);
}
Console.WriteLine("[Agent] [RunPlanner] ActionSelected={0}", currentAction);
// if no energy try to find a task that replenishes energy
if ((mEnergy - currentAction.mCost) < 0)
{
Console.WriteLine(
"[Agent] [RunPlanner] Info=\"No energy for selected task. Running replenish task\" CurrentEnergy={0} RequiredEnergy={1} ReplenishEnergy={2}",
mEnergy, currentAction.mCost, replenish.mCost);
currentAction = replenish;
}
return(currentAction);
}
static void GoapMain(string[] args)
{
// setup objects
WorldObject woWood = new WorldObject("wood");
WorldObject woAxe = new WorldObject("axe");
WorldObject woBed = new WorldObject("bed");
Agent woWoodDeposit = new Agent("wood deposit");
Agent Alice = new Agent("Alice");
// set up actions
// chop wood requires an axe, no wood
GOAPAction ChopWood = new GOAPAction("Chop wood", 3);
var reqAxe = new GOAPState <WorldObject>("requires Axe", woAxe,
(WorldObject wo, Agent a1) => { return(a1.HasWorldObject(wo)); });
var reqNoWood = new GOAPState <WorldObject>("requires no Wood", woWood,
(WorldObject wo, Agent a1) => { return(!a1.HasWorldObject(wo)); });
ChopWood.AddPrerequisite(reqAxe);
ChopWood.AddPrerequisite(reqNoWood);
var giveWood = new GOAPState <WorldObject>("give wood to agent", woWood,
(WorldObject wo, Agent a1) => { a1.AddObjectToInventory(wo); return(true); });
ChopWood.AddEffect(giveWood);
// done with chop wood
// deposit wood
GOAPAction DepositWood = new GOAPAction("Deposit wood", 2);
var reqWood = new GOAPState <WorldObject>("requires Wood", woWood,
(WorldObject wo, Agent a1) => { return(a1.HasWorldObject(wo)); });
DepositWood.AddPrerequisite(reqWood);
var depWood = new GOAPState <WorldObject, Agent>("give wood to depo", woWood, woWoodDeposit,
(WorldObject wo, Agent a1, Agent a2) =>
{
a2.RemoveObjectFromInventory(wo);
a1.AddObjectToInventory(wo);
return(true);
});
DepositWood.AddEffect(depWood);
// done with deposit wood
GOAPAction Sleep = new GOAPAction("Sleep", -20);
var reqSleep = new GOAPState("requires sleep",
(Agent a1) => { return(a1.mEnergy < 3); });
var replenishEnergy = new GOAPState <WorldObject>("sleep", woBed,
(WorldObject wo, Agent a1) => { /*a1.mEnergy += 20; */ return(true); });
Sleep.AddPrerequisite(reqSleep);
Sleep.AddEffect(replenishEnergy);
// rest
// done with rest
Alice.AddAction(ChopWood);
Alice.AddAction(DepositWood);
Alice.AddAction(Sleep);
Console.WriteLine("\n=== Simulation running ===\n");
// run simulation
while (Alice.RunPlanner())
{
Console.WriteLine("{0}", Alice.ToString());
Alice.PrintInventory();
Console.WriteLine();
}
Console.ReadLine();
}
