//暂停,感觉其实就是刷新一下数据
private void Suspend()
{
mPlanner.Exit();
mPlanner = NavState.Instance;
theAgent.RemoveFromCrowd();
theAgent.SetCorridorAssets(false);
theAgent.SetPathAssets(true);
theAgent.desiredVelocity = Vector3.zero;
theAgent.desiredSpeedSq = 0;
theAgent.flags &= ~NavFlag.PlannerFailed;
}
//实际上这是一个不断开闭的过程
//循环过程中也会不断Enter
public override bool Enter()
{
if (theAgent.navGroup.query == null)
{
return(false);
}
//在导航网格上找到自己的位置
NavmeshPoint pos = theAgent.GetPointSearch(theAgent.position);
if (pos.polyRef == 0)
{
//Debug.LogError(string.Format("{0}: Could not constrain position to navigation mesh. {1}", theAgent.transform.name, pos.ToString()));
return(false);
}
//在导航网格上找到目标的位置
NavmeshPoint goal = theAgent.GetPointSearch(theAgent.goal);
if (goal.polyRef == 0)
{
//Debug.LogError(string.Format("{0}: Could not constrain goal to navigation mesh. {1}", theAgent.transform.name, goal.ToString()));
return(false);
}
theAgent.RemoveFromCrowd();
theAgent.SetCorridorAssets(true);
theAgent.SetPathAssets(true);
//agent自己寻路，发现没有路就报错
if (theAgent.PlanCorridor(pos, goal) <= 0)
{
//Debug.LogError(string.Format("{0}: Could not plan corridor on enter.", theAgent.transform.name));
theAgent.flags &= ~NavFlag.CorridorInUse;
return(false);
}
//存储寻路之后的结果
theAgent.desiredPosition = theAgent.corridor.Position;
theAgent.plannerGoal = theAgent.corridor.Target;
theAgent.flags &= ~(NavFlag.HasNewPosition | NavFlag.HasNewGoal);
//设定速度和重置计数器
mSpeed = Mathf.Sqrt(theAgent.desiredSpeedSq);
mOptimizationTimer = OptimizationFrequency;
return(true);
}
//进入到状态
public override bool Enter()
{
if (theAgent == null || theAgent.navGroup.query == null || theAgent.navGroup.crowd == null)
{
return(false);
}
//当前的位置映射到navmesh的位置
NavmeshPoint pos = theAgent.GetPointSearch(theAgent.position);
if (pos.polyRef == 0)
{
Debug.LogError(string.Format("{0}: Could not constrain position to navigation mesh. {1}"
, theAgent.transform.name, pos.ToString()));
return(false);
}
//目标映射到navmesh的位置
NavmeshPoint goal = theAgent.GetPointSearch(theAgent.goal);
if (goal.polyRef == 0)
{
Debug.LogError(string.Format("{0}: Could not constrain goal to navigation mesh. {1}"
, theAgent.transform.name, goal.ToString()));
return(false);
}
//NavAgent开始进入到crowd
if (theAgent.AddToCrowd(pos.point) == null)
{
Debug.LogError(string.Format("{0}: Could not add agent to the crowd.", theAgent.transform.name));
return(false);
}
theAgent.desiredPosition = pos;
theAgent.plannerGoal = goal;
theAgent.flags &= ~(NavFlag.HasNewPosition | NavFlag.HasNewGoal);
theAgent.SetCorridorAssets(false);
theAgent.SetPathAssets(true);
return(HandlePositionFeedback());
}