public override BehaviourTreeStatus Update(BlackBoard blackboard, float deltaTime)
{
var numSucceeded = 0; //A counter for succeeded tasks
var numFailed = 0; //A counter for failed tasks
foreach (Task task in children) //Loop through and update each task.
{
var status = task.Update(blackboard, deltaTime);
if (status == BehaviourTreeStatus.Success) //If it succeeds, increment counter
{
numSucceeded++;
}
if (status == BehaviourTreeStatus.Failure) //If it fails, increment counter
{
numFailed++;
}
if (numFailed >= numNeededToFail)
{
return(BehaviourTreeStatus.Failure);
}
}
//If either of the checks pass then we are successful!
if (numSucceeded >= numNeededToPass)
{
return(BehaviourTreeStatus.Success);
}
//Otherwise keep running
return(BehaviourTreeStatus.Running);
}
private BehaviourTreeStatus RunChildTask(BlackBoard blackboard, float deltaTime)
{
while (true)
{
var childStatus = children[currIndex].Update(blackboard, deltaTime);
//This will start the next child in our children list
if (childStatus == BehaviourTreeStatus.Success)
{
childStatus = ChildSucceeded(blackboard);
if (childStatus == BehaviourTreeStatus.Running)
{
continue;
}
}
else if (childStatus == BehaviourTreeStatus.Failure)
{
childStatus = ChildFailed(blackboard);
if (childStatus == BehaviourTreeStatus.Running)
{
continue;
}
}
return(childStatus);
}
}
public override void Start(BlackBoard blackboard)
{
base.Start(blackboard);
if (children[currIndex].Check(blackboard))
{
children[currIndex].Start(blackboard);
}
//TODO What happens here with an empty sequence?
}
public override void End(BlackBoard blackboard)
{
if (currIndex < 0)
{
return;
}
for (var i = currIndex; i < children.Count; i++)
{
children[i].End(blackboard);
}
}
public override BehaviourTreeStatus Update(BlackBoard blackboard, float deltaTime)
{
var status = childTask.Update(blackboard, deltaTime);
if (status != BehaviourTreeStatus.Running)
{
return(BehaviourTreeStatus.Success);
}
return(status);
}
public override BehaviourTreeStatus Update(BlackBoard blackboard, float deltaTime)
{
base.Update(blackboard, deltaTime);
if (currIndex < 0 || currIndex >= children.Count)
{
return(BehaviourTreeStatus.Failure);
}
var childStatus = RunChildTask(blackboard, deltaTime);
return(childStatus);
}
public override void Start(BlackBoard blackboard)
{
//base.Start(blackboard);
//We don't call base.Start() because Parallel is special and doesn't need the typical Composite start
currIndex = -1;
children.ForEach(x =>
{
if (x.Check(blackboard))
{
x.Start(blackboard);
}
});
}
protected override BehaviourTreeStatus ChildSucceeded(BlackBoard blackboard)
{
children[currIndex].End(blackboard); //End the current child
currIndex++;
if (currIndex >= children.Count) //If the index is out of the bounds of our children, return success because we're done with the sequence
{
return(BehaviourTreeStatus.Success); //Return success
}
//If the child fails the check, return with failure
if (!children[currIndex].Check(blackboard))
{
return(BehaviourTreeStatus.Failure);
}
children[currIndex].Start(blackboard); //Start the child
return(BehaviourTreeStatus.Running); //Return that we are still running
}
public override BehaviourTreeStatus Update(BlackBoard blackboard, float deltaTime)
{
//If our condition returns true, then we're done with this task. Return success!
if (_cond(blackboard))
{
return(BehaviourTreeStatus.Success);
}
//Otherwise, update the child and get it's status
var status = childTask.Update(blackboard, deltaTime);
//If the status is not success... simply return the status of the child
if (status != BehaviourTreeStatus.Success && status != BehaviourTreeStatus.Failure)
{
return(status);
}
//If the child status is success or failure, we need to repeat (so reset() and start()
childTask.Reset(blackboard);
childTask.Start(blackboard);
return(BehaviourTreeStatus.Running);
}
public CompositeTask(List <Task> tasks, BlackBoard blackBoard) : base(blackBoard)
{
_tasks = tasks;
}
public CompositeTask(BlackBoard blackBoard) : base(blackBoard)
{
}
public override bool Check(BlackBoard blackboard)
{
return(currIndex < children.Count);
}
public SimpleParallelTask(List <Task> tasks, BlackBoard blackBoard) : base(tasks, blackBoard)
{
}
public override void End(BlackBoard blackboard)
{
childTask.End(blackboard);
}
/// <summary>
/// Used to check any special conditions before Start() is called.
/// </summary>
/// <returns>True if the task is ready to be started, false otherwise</returns>
public virtual bool Check(BlackBoard blackboard)
{
return(true);
}
public override BehaviourTreeStatus Update(BlackBoard blackboard, float delta)
{
return(fn(blackboard, delta));
}
public override void Reset(BlackBoard blackboard)
{
childTask.Reset(blackboard);
}
/// <summary>
/// Called when the task is reset for reuse.
/// </summary>
public virtual void Reset(BlackBoard blackboard)
{
}
public override BehaviourTreeStatus Update(BlackBoard blackboard, float deltaTime)
{
return(childTask.Update(blackboard, deltaTime));
}
/// <summary>
/// Called when the Task completes (either Success or Failure)
/// </summary>
public virtual void End(BlackBoard blackboard)
{
}
/// <summary>
/// The update method of the Task. Called to execute the behaviour.
/// </summary>
/// <param name="blackboard">The BlackBoard to use for data.</param>
/// <returns>The status of the Task. Success, Running, or Failure.</returns>
public virtual BehaviourTreeStatus Update(BlackBoard blackboard, float delta)
{
return(BehaviourTreeStatus.Success);
}
/// <summary>
/// Used to initialize anything like variables for use in the Update() method
/// </summary>
public virtual void Start(BlackBoard blackboard)
{
}
/// <summary> /// Called when the current child succeeds /// </summary> protected abstract BehaviourTreeStatus ChildSucceeded(BlackBoard blackboard);
public SequencesTask(List <Task> tasks, BlackBoard blackBoard) : base(tasks, blackBoard)
{
}
/// <summary> /// Called when the current child fails /// </summary> protected abstract BehaviourTreeStatus ChildFailed(BlackBoard blackboard);
public override void End(BlackBoard blackboard)
{
base.End(blackboard);
children.ForEach(task => task.End(blackboard));
}
public override void Reset(BlackBoard blackboard)
{
base.Reset(blackboard);
children.ForEach(x => x.Reset(blackboard));
currIndex = 0;
}
protected override BehaviourTreeStatus ChildSucceeded(BlackBoard blackboard)
{
throw new NotImplementedException();
}
public override BehaviourTreeStatus Update(BlackBoard blackboard, float deltaTime)
{
return(_cond(blackboard) ? base.Update(blackboard, deltaTime) : BehaviourTreeStatus.Failure);
}
public RandomSelectorTask(List<Task> tasks, BlackBoard blackBoard) : base(tasks, blackBoard)
{
}