public int ShouldUseItem()
{
//print("ShouldUseItem()");
// TODO: foreach item in inventory,
// if any item would give the player any value
// set itemToUseIndex to be the item that offers the greatest value and return success
// else if none of the items give any value at this moment (ex: no targets, etc...)
// return failure
int missileIndex = Inventory.GetItemIndex("Rocket");
int boostIndex = Inventory.GetItemIndex("Boost");
int shieldIndex = Inventory.GetItemIndex("Shield");
int oilSpillIndex = Inventory.GetItemIndex("Oil Spill");
if (boostIndex != -1)
{
itemToUseIndex = boostIndex;
}
else if (missileIndex != -1)
{
// check if other players are in sight for missile target
foreach (AbstractPlayer p in GameplayManager.Instance.Players)
{
RaycastHit[] hits = Physics.RaycastAll(transform.position + (Vector3.up * 0.5f), p.transform.position - transform.position);
foreach (RaycastHit hit in hits)
{
// we are colliding with ourself
if (hit.transform == transform)
{
continue;
}
if (hit.collider.tag.Equals("HumanPlayer") || hit.collider.tag.Equals("AIPlayer"))
{
AbstractPlayer potentialTarget = hit.collider.GetComponent <AbstractPlayer>();
// check if potentialTarget is in equal or higher place standing. If not, then do not waste the missile on them.
if (potentialTarget.checkpoints.Count <= checkpoints.Count)
{
playerAttackTarget = potentialTarget;
itemToUseIndex = missileIndex;
}
break;
}
}
}
}
else if (shieldIndex != -1)
{
// check if player is in sight for foreign missiles
foreach (AbstractPlayer p in GameplayManager.Instance.Players)
{
if (p.Inventory.GetItemIndex("Rocket") != -1)
{
RaycastHit[] hits = Physics.RaycastAll(p.transform.position + (Vector3.up * 0.5f), transform.position - p.transform.position);
Debug.DrawRay(p.transform.position, transform.position - p.transform.position, Color.red, 10000);
foreach (RaycastHit hit in hits)
{
// the ray has hit us
if (hit.transform == transform)
{
itemToUseIndex = shieldIndex;
}
}
// itemToUseIndex = shieldIndex;
}
}
}
else if (oilSpillIndex != -1)
{
// we can only place oil spills on neighbor nodes around us
IWeightedDiGraph <GameObject, float> graph = PositionNode.mbGraph.graph;
List <GameObject> potentialOilTargets = new List <GameObject>();
foreach (GraphNode <GameObject> graphNode in graph.Neighbors(PositionNode.nodeId))
{
// CalculatePathToGoal() and if this node is on that path then do not add it to the list (otherwise we'd be hindering ourselves)
potentialOilTargets.Add(graphNode.Data);
}
Checkpoint checkpointTarget = GetClosestCheckpoint();
MBGraphNode checkpointNode = checkpointTarget == null ? null : checkpointTarget.node;
GraphNode <GameObject> optimalGraphNode = reachableNodeIds.Count > 0 ? GameplayManager.Instance.gridGraph.graph[reachableNodeIds[0]] : null;
float dist = Mathf.Infinity;
foreach (string nodeId in reachableNodeIds)
{
GraphNode <GameObject> gNode = GameplayManager.Instance.gridGraph.graph[nodeId];
float tempDist = (gNode.Data.transform.position - checkpointNode.transform.position).magnitude;
if (tempDist < dist)
{
optimalGraphNode = gNode;
dist = tempDist;
}
}
if (optimalGraphNode != null)
{
List <GraphNode <GameObject> > path = pathFinding.FindPath(PositionNode.nodeId, optimalGraphNode.Id, MovementHeuristic, checkpoints.Count <= 1);
if (path.Count > 0)
{
path.RemoveAt(0);
}
if (path.Count == 0)
{
return((int)BTNode.EState.Failure);
}
// If there 1 or less nodes that don't have an oil spill on them then don't place the oil spill or else we would be trapping ourselves
if (potentialOilTargets.Count > 1)
{
// select the first potential oil target
nodeToSpillOn = potentialOilTargets[0];
foreach (GameObject ot in potentialOilTargets)
{
if (!path.Contains(GameplayManager.Instance.gridGraph.graph[ot.GetComponent <MBGraphNode>().nodeId]))
{
nodeToSpillOn = ot;
itemToUseIndex = oilSpillIndex;
break;
}
}
}
}
}
return(itemToUseIndex >= 0 ? (int)BTNode.EState.Success : (int)BTNode.EState.Failure);
}
public int ShouldTakeCover()
{
//print("ShouldTakeCover()");
// foreach player in the game, check if they have ranged/attack items
// if they do, then get the item with the longest range and check if they can reach this player
// if they can reach us
// set shouldTakeCover to true
// add players who are a threat to playerAttackThreats list
// return Success
// else if no one can reach us with an attack
// return failure
if (shieldObject.activeSelf)
{
return((int)BTNode.EState.Failure);
}
bool shouldTakeCover = false;
foreach (AbstractPlayer p in GameplayManager.Instance.Players)
{
int pOilSpillIndex = p.Inventory.GetItemIndex("Oil Spill");
int pMissileIndex = p.Inventory.GetItemIndex("Rocket");
if (pMissileIndex != -1)
{
RaycastHit[] hits = Physics.RaycastAll(p.transform.position + (Vector3.up * 0.5f), transform.position - p.transform.position);
foreach (RaycastHit hit in hits)
{
// the ray has hit us
if (hit.transform == transform)
{
playerAttackThreats.Add(p);
shouldTakeCover = true;
}
}
}
else if (pOilSpillIndex != -1)
{
IWeightedDiGraph <GameObject, float> graph = PositionNode.mbGraph.graph;
foreach (GraphNode <GameObject> graphNode in graph.Neighbors(PositionNode.nodeId))
{
if (graphNode.Data.transform == PositionNode.transform)
{
// we can be hit by this player's oil spill directly
playerAttackThreats.Add(p);
shouldTakeCover = true;
}
}
}
}
if (shouldTakeCover)
{
return((int)BTNode.EState.Success);
}
else
{
return((int)BTNode.EState.Failure);
}
}
public List <GraphNode <GameObject> > FindPath(string startId, string goalId, Heuristic heuristic = null, bool blockedOffNodesAreAllowed = false, bool isAdmissible = true)
{
if (mbGraph == null)
{
return(new List <GraphNode <GameObject> >());
}
IWeightedDiGraph <GameObject, float> graph = mbGraph.graph;
if (heuristic == null)
{
heuristic = (Transform s, Transform e) => 0;
}
List <GraphNode <GameObject> > path = null;
bool solutionFound = false;
Dictionary <string, float> gnDict = new Dictionary <string, float>();
gnDict.Add(startId, default);
Dictionary <string, float> fnDict = new Dictionary <string, float>();
fnDict.Add(startId, heuristic(graph[startId].Data.transform, graph[goalId].Data.transform) + gnDict[startId]);
Dictionary <string, string> pathDict = new Dictionary <string, string>();
pathDict.Add(startId, null);
PriorityQueue <float, string> openPQ = new PriorityQueue <float, string>();
openPQ.Push(fnDict[startId], startId, fnDict[startId]);
OrderedDictionary closedODict = new OrderedDictionary();
while (!openPQ.Empty)
{
string currentId = openPQ.Pop().Value;
closedODict[currentId] = true;
if (currentId == goalId && isAdmissible)
{
solutionFound = true;
break;
}
else if (closedODict.Contains(goalId))
{
float gGoal = gnDict[goalId];
bool pathIsTheShortest = true;
foreach (PQEntry <float, string> entry in openPQ)
{
if (gGoal > gnDict[entry.Value])
{
pathIsTheShortest = false;
break;
}
}
if (pathIsTheShortest)
{
break;
}
}
List <GraphNode <GameObject> > neighbors = graph.Neighbors(currentId);
foreach (GraphNode <GameObject> n in neighbors)
{
float cost = graph.GetEdge(currentId, n.Id).Weight;
if (closedODict.Contains(n.Id))
{
continue;
}
if (GameplayManager.Instance.blockedOffNodes.Contains(n.Data.GetComponent <MBGraphNode>()) && !blockedOffNodesAreAllowed)
{
continue;
}
if (graph[n.Id].Data.GetComponentInChildren <OilSpillManager>() != null)
{
cost += 4; // hard coded oil spill cost
}
float gNeighbor = gnDict[currentId] + cost;
if (!gnDict.ContainsKey(n.Id) || gNeighbor < gnDict[n.Id])
{
pathDict[n.Id] = currentId;
gnDict[n.Id] = gNeighbor;
float hNeighbor = heuristic(n.Data.transform, graph[goalId].Data.transform);
fnDict[n.Id] = gNeighbor + hNeighbor;
openPQ.Push(fnDict[n.Id], n.Id, hNeighbor);
if (openPQ.Top.Key > fnDict[n.Id])
{
closedODict[currentId] = true;
}
}
}
}
if (!solutionFound && closedODict.Contains(goalId))
{
solutionFound = true;
}
if (solutionFound)
{
path = new List <GraphNode <GameObject> >();
string key = goalId;
while (key != null && pathDict.ContainsKey(key))
{
path.Add(graph[key]);
key = pathDict[key];
}
path.Reverse();
}
return(path);
}
