float CaculateNodeCost(PlayerAtt player, PathFindNodeItem a, PathFindNodeItem b)
{
bool needClimb = false;
bool needJump = false;
if (b.Height - a.Height > grid.CanPathThrethhold)
{
needClimb = true;
}
else if (a.Height - b.Height > grid.CanPathThrethhold)
{
needJump = true;
}
float distance = getDistanceNodes(a, b);
float cost = distance / player.moveSpeed;
if (needClimb)
{
if (player.climbSpeed > 0.0f)
{
float climpcost = (b.Height - a.Height) / player.climbSpeed;
cost += climpcost;
}
else
{
cost = -1.0f;
}
}
if (needJump)
{
}
return(cost);
}
// A*寻路
void FindingPath(PlayerAtt player, Vector3 s, Vector3 e)
{
PathFindNodeItem startNode = grid.getItem(s);
PathFindNodeItem endNode = grid.getItem(e);
List <PathFindNodeItem> openSet = new List <PathFindNodeItem>();
HashSet <PathFindNodeItem> closeSet = new HashSet <PathFindNodeItem>();
openSet.Add(startNode);
while (openSet.Count > 0)
{
PathFindNodeItem curNode = openSet[0];
for (int i = 0, max = openSet.Count; i < max; i++)
{
if (openSet[i].fCost <= curNode.fCost)
{
curNode = openSet[i];
}
}
openSet.Remove(curNode);
closeSet.Add(curNode);
// 找到的目标节点
if (curNode == endNode)
{
Debug.Log("cost is :" + curNode.gCost.ToString());
generatePath(startNode, endNode);
return;
}
// 判断周围节点，选择一个最优的节点
foreach (var item in grid.getNeibourhood(curNode))
{
// 如果是墙或者已经在关闭列表中
float neibourCost = CaculateNodeCost(player, curNode, item);
if (neibourCost == -1.0f || closeSet.Contains(item))
{
continue;
}
// 计算当前相领节点现开始节点距离
float newCost = curNode.gCost + neibourCost;
// 如果距离更小，或者原来不在开始列表中
if (newCost < item.gCost || !openSet.Contains(item))
{
// 更新与开始节点的距离
item.gCost = newCost;
// 更新与终点的距离
item.hCost = getDistanceNodes(item, endNode) / player.moveSpeed;
// 更新父节点为当前选定的节点
item.parent = curNode;
// 如果节点是新加入的，将它加入打开列表中
if (!openSet.Contains(item))
{
openSet.Add(item);
}
}
}
}
generatePath(startNode, null);
}
// Use this for initialization
void Start()
{
grid = GetComponent <Grid>();
player = GetComponent <PlayerAtt>();
}