Example #1
0
        private TaskStatus RunTask(BehaviorManager.BehaviorTree behaviorTree, int taskIndex, int stackIndex)
        {
            Task task = behaviorTree.taskList[taskIndex];

            // 第一步:加保护
            if (null == task)
            {
                Debug.LogError("NULL TASK");
                return(TaskStatus.Failure);
            }

            TaskStatus taskStatus = task.NodeData.ExecutionStatus;

            // 第二步:Push,再在Push里调用OnStart
            PushTask(behaviorTree, taskIndex, stackIndex);
            // 第三步:如果是父节点
            if (task is ParentTask)
            {
                ParentTask parentTask             = task as ParentTask;
                int        childIndex             = -1;
                TaskStatus currentChildTaskStatus = TaskStatus.Inactive;


                // 1、父节点是否已经执行完所有孩子了
                while (parentTask.CanExecute())
                {
                    if (task is Decorator && (behaviorTree.decoratorIndexList.Contains(taskIndex)))
                    {
                        break;
                    }

                    // 2、如果可以并行地执行所有孩子就不用等当前孩子跑完
                    if (parentTask.CanRunParallelChildren() || TaskStatus.Running != currentChildTaskStatus)
                    {
                        childIndex = parentTask.CurrentChildIndex();
                        int nextRunTaskIndex = behaviorTree.GetIndexInTaskList(taskIndex, childIndex);

                        if (parentTask.CanRunParallelChildren())
                        {
                            behaviorTree.activeStackList.Add(new Stack <int>());
                            stackIndex = behaviorTree.activeStackList.Count - 1;
                            parentTask.OnChildStarted(childIndex);
                        }
                        else
                        {
                            parentTask.OnChildStarted();
                        }

                        // 3、跑下一个子节点
                        currentChildTaskStatus = RunTask(behaviorTree, nextRunTaskIndex, stackIndex);
                        taskStatus             = currentChildTaskStatus;

                        if (parentTask is Decorator)
                        {
                            behaviorTree.decoratorIndexList.Add(taskIndex);
                            behaviorTree.decoratorIndexStatusDic.Add(taskIndex, parentTask.OverrideStatus(taskStatus));
                        }
                    }
                    else
                    {
                        break;
                    }
                }

                // 关于Decorator的特殊逻辑
                if (task is Decorator && behaviorTree.decoratorIndexList.Contains(taskIndex))
                {
                    taskStatus = behaviorTree.decoratorIndexStatusDic[taskIndex];
                    behaviorTree.decoratorIndexList.Remove(taskIndex);
                    behaviorTree.decoratorIndexStatusDic.Remove(taskIndex);
                    return(taskStatus);
                }
                taskStatus = parentTask.OverrideStatus(taskStatus);
            }
            // 第四步:如果是子节点,直接跑自己的OnUpdate
            else
            {
                taskStatus = task.OnUpdate();
            }

            // 保存好本帧自己的执行结果
            task.NodeData.ExecutionStatus = taskStatus;

            // 第五步:不管是正常跑完还是非正常终止的都要调下OnEnd
            if (TaskStatus.Running != taskStatus)
            {
                PopTask(behaviorTree, taskIndex, stackIndex, (task is ParentTask));
            }
            return(taskStatus);
        }