private float totaldistance(Waypoint self, WaypointQueueable from)
{
float distbetween = Vector3.Distance(self.transform.position, from.self.transform.position);
//The distance to a node is equal to the total distance of the node it came from plus the distance from that node to the current node
return(from.disttostart + distbetween);
}
private WaypointQueueable enqueue(FastPriorityQueue <WaypointQueueable> q, Waypoint self, WaypointQueueable from = null)
{
float dist = 0;
if (from != null)
{
dist = totaldistance(self, from); //the weight to the neighbor self from the waypoint from.self
}
WaypointQueueable newwayp = new WaypointQueueable()
{
self = self,
from = from,
disttostart = dist
};
//Debug.Log("Enqueue " + self.hashname + " with distance " + dist);
q.Enqueue(newwayp, dist);
return(newwayp);
}
public Stack <Waypoint> Path(Waypoint start, Waypoint end)
{
FastPriorityQueue <WaypointQueueable> queue = new FastPriorityQueue <WaypointQueueable>(128);
//Debug.Log("Starting path algorithm from " + start.hashname + " to " + end.hashname);
//Debug.Log("Enqueue start of " + start.hashname);
enqueue(queue, start);
List <int> alreadyAddedWaypoints = new List <int>();
alreadyAddedWaypoints.Add(start.WaypointID);
WaypointQueueable endqueueable = null;
bool endFound = false;
while (queue.Count > 0 && !endFound)
{
if (queue.Count > 127)
{
Debug.LogError("Catastrophic pathing falure: Queue length exceeded maximum. Aborting loop!");
break;
}
WaypointQueueable headqueueable = dequeue(queue);
Waypoint head = headqueueable.self;
//Debug.Log("Dequeue " + head.hashname);
//Debug.Log("Number of neighbors: " + head.neighbors.Count);
for (int i = 0; i < head.neighbors.Count; i++)
{
NeighborConnection neighbor = head.neighbors[i];//This cant be foreach because you can't (break;) foreach *grumble grumble*
//Debug.Log("Checking neighbor " + neighbor.neighbor.hashname);
WaypointQueueable neighborqueueable = null;
foreach (WaypointQueueable waypq in queue)
{
if (waypq.self.WaypointID == neighbor.neighbor.WaypointID)
{
//Debug.Log("Neighbor already found in queue");
neighborqueueable = waypq;
break;//techincally I think this doesnt do anything
}
}
bool addedBefore = false;
foreach (int addedID in alreadyAddedWaypoints) // alreadyAddedWaypoints.Contains was not functioning for some reason so I just did it manually
{
if (addedID == neighbor.neighborID)
{
addedBefore = true;
}
}
if (neighborqueueable == null && !addedBefore)
{
//Debug.Log("New neighbor, enqueueing " + neighbor.neighbor.name);
neighborqueueable = enqueue(queue, neighbor.neighbor, headqueueable);
alreadyAddedWaypoints.Add(neighbor.neighborID);
}
else if (neighborqueueable != null)
{
//Debug.Log("Already exists; Checking if should update weight");
float newdist = totaldistance(neighbor.neighbor, headqueueable);
if (newdist < neighborqueueable.disttostart)
{
//Debug.Log("Updating weight");
queue.UpdatePriority(neighborqueueable, newdist);
}
}
else
{
//Debug.Log("This waypoint has already been added at some point; will not add");
}
//If the end point is the next point, a path is found
if (neighbor.neighbor.WaypointID == end.WaypointID)
{
//Debug.Log("End detected");
endqueueable = neighborqueueable; //Should always be the first time this node is found so this should always be set to something
endFound = true;
break;
}
}
}
if (endqueueable == null)
{
Debug.Log("No path found between " + start.hashname + " and " + end.hashname);
Stack <Waypoint> stack = new Stack <Waypoint>();
stack.Push(start);
queue.Clear();
alreadyAddedWaypoints.Clear();
return(stack);
}
else
{
Stack <Waypoint> stack = new Stack <Waypoint>();
stack.Push(end);
WaypointQueueable next = endqueueable.from;
while (next != null) //Will stop before pushing start
{
stack.Push(next.self);
next = next.from;
}
stack.Push(start);
//Debug.Log("Path found. Returning path " + stack.ToArray());
queue.Clear();
alreadyAddedWaypoints.Clear();
return(stack);
}
}