public List <Vertex> GetPathDijkstra(GameObject srcObj, GameObject dstObj)
{
if (srcObj == null || dstObj == null)
{
return(new List <Vertex>());
}
Vertex src = GetNearestVertex(srcObj.transform.position);
Vertex dst = GetNearestVertex(dstObj.transform.position);
GPWiki.BinaryHeap <Edge> frontier = new GPWiki.BinaryHeap <Edge>();
Edge[] edges;
Edge node, child;
int size = vertices.Count;
float[] distValue = new float[size];
int[] previous = new int[size];
node = new Edge(src, 0);
frontier.Add(node);
distValue[src.id] = 0;
previous[src.id] = src.id;
for (int i = 0; i < size; i++)
{
if (i == src.id)
{
continue;
}
distValue[i] = Mathf.Infinity;
previous[i] = -1;
}
while (frontier.Count != 0)
{
node = frontier.Remove();
int nodeId = node.vertex.id;
// exit if necessary
if (ReferenceEquals(node.vertex, dst))
{
return(BuildPath(src.id, node.vertex.id, ref previous));
}
edges = GetEdges(node.vertex);
foreach (Edge e in edges)
{
int eId = e.vertex.id;
if (previous[eId] != -1)
{
continue;
}
float cost = distValue[nodeId] + e.cost;
if (cost < distValue[e.vertex.id])
{
distValue[eId] = cost;
previous[eId] = nodeId;
frontier.Remove(e);
child = new Edge(e.vertex, cost);
frontier.Add(child);
}
}
}
return(new List <Vertex>());
}
/// <summary>
/// Returns the shortest path from source to destination
/// using A* algorithm.
/// </summary>
/// <param name='src' type='GameObject'>
/// Source.
/// </param>
/// <param name='dst' type='GameObject'>
/// Destination
/// </param>
public List <GameObject> Astar(GameObject src, GameObject dst)
{
List <AiEdge> successors;
AiVertex auxVertex;
int cost = 0;
bool isInFrontier = false, isInExplored = false;
AiNode node = new AiNode(src, 1);
AiNode dstNode = new AiNode(dst, 1);
AiNode child;
GPWiki.BinaryHeap <AiNode> frontier = new GPWiki.BinaryHeap <AiNode>();
List <GameObject> explored = new List <GameObject>();
frontier.Add(node);
while (true)
{
if (frontier.Count == 0)
{
return(new List <GameObject>());
}
node = frontier.Remove();
explored.Add(node.m_GameObject);
if (node.Equals(dstNode))
{
return(explored);
}
auxVertex = node.m_GameObject.GetComponent <AiVertex>();
successors = auxVertex.m_Successors;
foreach (AiEdge e in successors)
{
cost = e.m_Cost;
cost += (int)Vector3.Distance(e.m_Vertex.gameObject.transform.position, dst.transform.position);
child = new AiNode(e.m_Vertex.gameObject, cost);
isInFrontier = frontier.Contains(child);
isInExplored = explored.Contains(child.m_GameObject);
if (!isInExplored && !isInFrontier)
{
frontier.Add(child);
}
else if (isInFrontier)
{
foreach (AiNode n in frontier)
{
if (n.Equals(child) && (n.m_Cost > child.m_Cost))
{
frontier.Remove(child);
frontier.Add(child);
}
}
}
}
}
}
public List <Vertex> AStarMbush(
Vertex src,
Vertex dst,
Lurker agent,
List <Lurker> lurkers,
Heuristic h = null)
{
if (ReferenceEquals(h, null))
{
h = EuclidDist;
}
int graphSize = vertices.Count;
float[] extra = new float[graphSize];
float[] costs = new float[graphSize];
int i;
for (i = 0; i < graphSize; i++)
{
extra[i] = 1f;
costs[i] = Mathf.Infinity;
}
foreach (Lurker l in lurkers)
{
foreach (Vertex v in l.path)
{
extra[v.id] += 1f;
}
}
Edge[] successors;
int[] previous = new int[graphSize];
for (i = 0; i < graphSize; i++)
{
previous[i] = -1;
}
previous[src.id] = src.id;
float cost = 0;
Edge node = new Edge(src, 0);
GPWiki.BinaryHeap <Edge> frontier = new GPWiki.BinaryHeap <Edge>();
frontier.Add(node);
while (frontier.Count != 0)
{
node = frontier.Remove();
if (ReferenceEquals(node.vertex, dst))
{
return(BuildPath(src.id, node.vertex.id, ref previous));
}
int nodeId = node.vertex.id;
if (node.cost > costs[nodeId])
{
continue;
}
successors = GetEdges(node.vertex);
foreach (Edge e in successors)
{
int eId = e.vertex.id;
if (previous[eId] != -1)
{
continue;
}
cost = e.cost;
cost += costs[dst.id];
cost += h(e.vertex, dst);
if (cost < costs[e.vertex.id])
{
Edge child;
child = new Edge(e.vertex, cost);
costs[eId] = cost;
previous[eId] = nodeId;
frontier.Remove(e);
frontier.Add(child);
}
}
}
return(new List <Vertex>());
}
public IEnumerator GetPathInFrames(GameObject srcObj, GameObject dstObj, Heuristic h = null)
{
// changes over A*
isFinished = false;
path = new List <Vertex>();
if (srcObj == null || dstObj == null)
{
path = new List <Vertex>();
isFinished = true;
yield break;
}
//////////////////////////////
if (ReferenceEquals(h, null))
{
h = EuclidDist;
}
Vertex src = GetNearestVertex(srcObj.transform.position);
Vertex dst = GetNearestVertex(dstObj.transform.position);
GPWiki.BinaryHeap <Edge> frontier = new GPWiki.BinaryHeap <Edge>();
Edge[] edges;
Edge node, child;
int size = vertices.Count;
float[] distValue = new float[size];
int[] previous = new int[size];
node = new Edge(src, 0);
frontier.Add(node);
distValue[src.id] = 0;
previous[src.id] = src.id;
for (int i = 0; i < size; i++)
{
if (i == src.id)
{
continue;
}
distValue[i] = Mathf.Infinity;
previous[i] = -1;
}
while (frontier.Count != 0)
{
// changes over A*
yield return(null);
//////////////////////////////
node = frontier.Remove();
int nodeId = node.vertex.id;
if (ReferenceEquals(node.vertex, dst))
{
// changes over A*
path = BuildPath(src.id, node.vertex.id, ref previous);
break;
//////////////////////////////
}
edges = GetEdges(node.vertex);
foreach (Edge e in edges)
{
int eId = e.vertex.id;
if (previous[eId] != -1)
{
continue;
}
float cost = distValue[nodeId] + e.cost;
// key point
cost += h(node.vertex, e.vertex);
if (cost < distValue[e.vertex.id])
{
distValue[eId] = cost;
previous[eId] = nodeId;
frontier.Remove(e);
child = new Edge(e.vertex, cost);
frontier.Add(child);
}
}
}
// chages over A*
isFinished = true;
yield break;
//////////////////////////////
}
public List <GuildRecord> ComputeMapFlooding()
{
GPWiki.BinaryHeap <GuildRecord> open;
open = new GPWiki.BinaryHeap <GuildRecord>();
List <GuildRecord> closed;
closed = new List <GuildRecord>();
foreach (Guild g in guildList)
{
GuildRecord gr = new GuildRecord();
Vector3 pos = g.baseObject.transform.position;
gr.location = GetNearestVertex(pos);
gr.guild = g;
gr.strength = g.GetDropOff(0f);
open.Add(gr);
}
while (open.Count != 0)
{
GuildRecord current;
current = open.Remove();
Vertex v = current.location;
Vector3 currPos;
currPos = v.transform.position;
Vertex[] neighbours;
neighbours = GetNeighbours(v);
foreach (Vertex n in neighbours)
{
Vector3 nPos = n.transform.position;
float dist = Vector3.Distance(currPos, nPos);
float strength = current.guild.GetDropOff(dist);
if (strength < dropOffThreshold)
{
continue;
}
GuildRecord neighGR = new GuildRecord();
neighGR.location = n;
neighGR.strength = strength;
VertexInfluence vi;
vi = n as VertexInfluence;
neighGR.guild = vi.guild;
if (closed.Contains(neighGR))
{
Vertex location = neighGR.location;
int index = closed.FindIndex(x => x.location == location);
GuildRecord gr = closed[index];
if (gr.guild.name != current.guild.name &&
gr.strength < strength)
{
continue;
}
}
else if (open.Contains(neighGR))
{
bool mustContinue = false;
foreach (GuildRecord gr in open)
{
if (gr.Equals(neighGR))
{
mustContinue = true;
break;
}
}
if (mustContinue)
{
continue;
}
}
else
{
neighGR = new GuildRecord();
neighGR.location = n;
}
neighGR.guild = current.guild;
neighGR.strength = strength;
open.Add(neighGR);
}
closed.Add(current);
}
return(closed);
}
