//从池子里面获取路径（目前都是在NavAgent里面处理的）
public NavPaths GetPath()
{
if (mPaths.Count > 0)
{
NavPaths aPath = mPaths.Pop();
return(aPath);
}
return(new NavPaths(mMaxPathSize, mMaxStraightPathSize));
}
//回收这个路径（目前都是在NavAgent里面处理的）
public void ReturnPath(NavPaths path)
{
if (mPaths.Count >= mMaxPaths || path == null ||
path.path.Length != mMaxPathSize ||
(path.straightPath != null && path.straightPath.Length != mMaxStraightPathSize)
)
{
return;
}
//清理过去存过的内存
path.pathCount = 0;
path.straightCount = 0;
//这句话非常重要，这里不仅仅是释放内存，也是外边的一个重要的标记
path.straightPath = null;
mPaths.Push(path);
}
public void SetPathAssets(bool enabled)
{
if (enabled)
{
if (path == null)
{
path = agentGroup.GetPath();
}
flags |= NavFlag.PathInUse;
}
else
{
agentGroup.ReturnPath(path);
path = null;
flags &= ~NavFlag.PathInUse;
}
}