static public BtAction GetBehaviorTreeDemo1()
{
if (bev_tree_demo1 != null)
{
return(bev_tree_demo1);
}
// root
bev_tree_demo1 = new BtActionPrioritizedSelector();
{
// 序列节点
BtActionSequence sequence_01 = new BtActionSequence();
bev_tree_demo1.AddChild(sequence_01);
{
//
TbPreconditionNot not = new TbPreconditionNot(new BtHasReachedTargetCondition());
sequence_01.SetPrecondition(not);
{
sequence_01.AddChild(new BtTurnToLeaf());
sequence_01.AddChild(new BtMoveToLeaf());
}
}
bev_tree_demo1.AddChild(new BtAttackLeaf());
}
return(bev_tree_demo1);
}
protected override bool OnEvaluate(BtWorkingData workData)
{
BtActionParallelContext thisContext = GetContext <BtActionParallelContext>(workData);
_init_list_to(thisContext._evaluationStatus, false);
bool finalResult = false;
for (int i = 0; i < GetChildCount(); ++i)
{
BtAction node = GetChild <BtAction>(i);
bool ret = node.Evaluate(workData);
//early break
if (_evaluationRelationship == E_ChildrenRelationShip.and && ret == false)
{
finalResult = false;
break;
}
if (ret)
{
finalResult = true;
}
thisContext._evaluationStatus[i] = ret;
}
return(finalResult);
}
public BtEntityAi Init()
{
_behavior_tree = BtEntityFactory.GetBehaviorTreeDemo1();
_behavior_working_data = new AIEntityWorkingData();
_behavior_working_data.EntityAi = this;
_blackboard = new BtBlackBoard();
_nexttime_to_gen_moving_target = 0;
return(this);
}
protected override void OnTransition(BtWorkingData workData)
{
BtActionParallelContext thisContext = GetContext <BtActionParallelContext>(workData);
for (int i = 0; i < GetChildCount(); ++i)
{
BtAction node = GetChild <BtAction>(i);
node.Transition(workData);
}
//clear running status
_init_list_to(thisContext._runningStatus, BtRunningStatus.EXECUTING);
}
protected override int OnUpdate(BtWorkingData workData)
{
BtActionParallelContext thisContext = GetContext <BtActionParallelContext>(workData);
//first time initialization
if (thisContext._runningStatus.Count != GetChildCount())
{
_init_list_to(thisContext._runningStatus, BtRunningStatus.EXECUTING);
}
bool hasFinished = false;
bool hasExecuting = false;
for (int i = 0; i < GetChildCount(); ++i)
{
if (thisContext._evaluationStatus[i] == false)
{
continue;
}
if (BtRunningStatus.IsFinished(thisContext._runningStatus[i]))
{
hasFinished = true;
continue;
}
BtAction node = GetChild <BtAction>(i);
int runningStatus = node.Update(workData);
if (BtRunningStatus.IsFinished(runningStatus))
{
hasFinished = true;
}
else
{
hasExecuting = true;
}
thisContext._runningStatus[i] = runningStatus;
}
if (_runningstatusRelationship == E_ChildrenRelationShip.or && hasFinished || _runningstatusRelationship == E_ChildrenRelationShip.and && hasExecuting == false)
{
_init_list_to(thisContext._runningStatus, BtRunningStatus.EXECUTING);
return(BtRunningStatus.FINISHED);
}
return(BtRunningStatus.EXECUTING);
}
public static BtAction GetBtDemo2()
{
if (bev_tree_demo2 != null)
{
return(bev_tree_demo2);
}
// root
bev_tree_demo2 = new BtActionPrioritizedSelector();
{
BtActionPrioritizedSelector patrol = new BtActionPrioritizedSelector();
patrol.TbName = "巡逻";
bev_tree_demo2.AddChild(patrol);
{
// 视野内没有目标
// 随机走路
}
BtActionSequence attack_sequence = new BtActionSequence();
attack_sequence.TbName = "攻击";
bev_tree_demo2.AddChild(attack_sequence);
{
BtActionSequence violent_attack = new BtActionSequence();
violent_attack.TbName = "狂暴攻击";
{
// 自身处于狂暴状态
// 移动
// 普攻
}
BtActionSequence normal_attack = new BtActionSequence();
normal_attack.TbName = "常规攻击";
// 视野内发现目标
// 目标是玩家
{
// 移动
// 普攻
}
}
BtActionPrioritizedSelector self_defense = new BtActionPrioritizedSelector();
self_defense.TbName = "反击";
bev_tree_demo2.AddChild(self_defense);
{
// 反击
{
// 玩家被攻击
// 生命高于500
// 移动 攻击玩家
}
// 逃跑
{
// 玩家被攻击
// hp 低于500
// 在警戒线外
}
}
}
return(bev_tree_demo2);
}