AI决策算法之GOAP（三）
发表于2018-02-26
上篇给大家分别介绍了 IGoal，Agent，Action，Planer，FSM的实现，这篇我们就用上篇文章写的GOAP框架来完成一个实例：
实例内容：
（1）AI有10HP， 需要去站岗，站岗完成扣5HP
（2）当HP<=5必须去补充HP，找到HP球补充HP，每个HP球补充5HP
根据GOAP框架逻辑推断出需要：AI数据提供者，站岗Action，补充HPAction，HP点脚本，站岗点脚本， AI属性脚本
主要脚本：
AI数据提供者
public class Worker : MonoBehaviour,IGoap｛
private PropertyComponent property; //属性脚本
public float moveSpeed = 3; //移动速度
void Start()
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property = GetComponent<PropertyComponent>();
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public System.Collections.Generic.HashSet<System.Collections.Generic.KeyValuePair<string, object>> GetState()
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HashSet<KeyValuePair<string, object>> state = new HashSet<KeyValuePair<string, object>>();
//当前状态HP是否足够
state.Add(new KeyValuePair<string, object>("EnoughHP", property.HP > 5));
return state;
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public System.Collections.Generic.HashSet<System.Collections.Generic.KeyValuePair<string, object>> CreateGoalState()
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HashSet<KeyValuePair<string, object>> goal = new HashSet<KeyValuePair<string, object>>();
//站岗完成目标
goal.Add(new KeyValuePair<string, object>("SentryComplete", true));
return goal;
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public void PlanFailed(System.Collections.Generic.HashSet<System.Collections.Generic.KeyValuePair<string, object>> failedGoal)
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public void PlanFound(System.Collections.Generic.HashSet<System.Collections.Generic.KeyValuePair<string, object>> goal, System.Collections.Generic.Queue<Action> actions)
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public void ActionsFinished()
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Debug.LogError("FinishedSentry");
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public void PlanAborted(Action aborterAction)
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public bool MoveAgent(Action tagetAction)
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//移动
float step = moveSpeed * Time.deltaTime;
gameObject.transform.position = Vector3.MoveTowards(gameObject.transform.position, tagetAction.target.transform.position, step);
if (gameObject.transform.position.Equals(tagetAction.target.transform.position))
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tagetAction.IsInRange = true;
return true;
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else
return false;
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站岗Action
public class SentryAction : Action ｛
private SentryComponent targetSentry; //站岗目标脚本
private float SentryTimer = 0; //站岗计时
public float SentryTime = 3;
bool isDone = false; //是否完成
public SentryAction()
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AddPrecondition("EnoughHP", true); //前置条件：必须HP足够
AddEffect("SentryComplete", true); //完成效果：站岗完成
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public override void Reset()
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targetSentry = null;
SentryTimer = 0;
isDone = false;
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public override bool IsDone()
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return isDone;
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public override bool CheckProcedualPrecondition(GameObject agent)
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//得到最近的站岗目标
SentryComponent[] sentryComponents = GameObject.FindObjectsOfType<SentryComponent>();
SentryComponent temp = null;
foreach(var v in sentryComponents)
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if (temp == null)
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temp = v;
continue;
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if (Vector3.Distance(agent.transform.position, v.transform.position) < Vector3.Distance(agent.transform.position, temp.transform.position))
temp = v;
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targetSentry = temp;
target = temp.gameObject;
return temp != null;
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public override bool Perform(GameObject agent)
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//站岗执行
SentryTimer += Time.deltaTime;
if(SentryTimer > SentryTime)
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//站岗完成消耗HP
agent.GetComponent<PropertyComponent>().HP -= 5;
isDone = true;
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return true;
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public override bool RequiresInRange()
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return true;
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补充HPAction
public class GetHPAction : Action ｛
private HPPointComponent targetHPPoint; //HP点目标脚本
bool isDone = false;
void Start()
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AddEffect("EnoughHP", true); //完成效果：HP补充到足够
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public override void Reset()
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targetHPPoint = null;
isDone = false;
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public override bool IsDone()
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return isDone;
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public override bool CheckProcedualPrecondition(GameObject agent)
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HPPointComponent[] tempComponents = GameObject.FindObjectsOfType<HPPointComponent>();
HPPointComponent temp = null;
foreach (var v in tempComponents)
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if (temp == null)
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temp = v;
continue;
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if (Vector3.Distance(agent.transform.position, v.transform.position) < Vector3.Distance(agent.transform.position, temp.transform.position))
temp = v;
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targetHPPoint = temp;
target = temp.gameObject;
return temp != null;
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public override bool Perform(GameObject agent)
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DestroyImmediate(targetHPPoint.gameObject);
isDone = true;
agent.GetComponent<PropertyComponent>().HP += 5;
return true;
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public override bool RequiresInRange()
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return true;
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