public static float CalculateDistance(Node n1, Node n2)
{
Point3D p1 = new Point3D(n1.X, n1.Y, n1.Z);
Point3D p2 = new Point3D(n2.X, n2.Y, n2.Z);
return (float)Math.Sqrt((Math.Pow(p2.X - p1.X, 2) + Math.Pow(p2.Y - p1.Y, 2) + Math.Pow(p2.Z - p1.Z, 2)));
}
private void ReadNodes(ref Stream s, HeaderStruct header)
{
BinaryReader br = new BinaryReader(s);
int size = Marshal.SizeOf(typeof(NodeStruct));
int nsize = Marshal.SizeOf(typeof(NeighborStruct));
byte[] buffer = new byte[size];
byte[] neighbor = new byte[nsize];
List<Neighbor> nList;
Node n;
for (int i = 0; i < header.pathNodeCount; i++)
{
br.Read(buffer, 0, size);
n = new Node(Functions.ByteArrayToStructure<NodeStruct>(buffer));
nList = new List<Neighbor>();
for (int j = 0; j < 50; j++)
{
br.Read(neighbor, 0, nsize);
NeighborStruct neighborData = Functions.ByteArrayToStructure<NeighborStruct>(neighbor);
if (neighborData.id == -1) continue;
nList.Add(new Neighbor(neighborData));
}
n.Neighbors = nList;
_nodes.Add(n);
}
ConnectNodes();
}
private void OnNodeRemoved(Node node,List<Node>neighbors)
{
if (NodeRemoved != null)
{
NodeRemoved(this, new PathModifiedEventArgs(node,neighbors));
}
}
private void OnNodeAdded(Node node)
{
if (NodeAdded != null)
{
NodeAdded(this, new PathModifiedEventArgs(node,new List<Node>()));
}
}
public void RemoveNode(Node node)
{
//OnNodeRemoved(node);
List<Node> neighbors = new List<Node>();
node.DisconnectAll();
foreach (Node n in Nodes)
{
if (n.Neighbors.RemoveAll(x => x.Node == node) > 0)
{
neighbors.Add(n);
}
}
Nodes.Remove(node);
UpdateNodes();
OnNodeRemoved(node, neighbors);
}
public void NodeTwoWayDisconnect(Node n1, Node n2)
{
n1.DisconnectNodeTwoWay(n2);
}
public void NodeSingleDisconnect(Node n1, Node n2)
{
n1.DisconnectNode(n2);
}
public void ConnectToNodeAsWarp(Node target)
{
ConnectToNode(target);
foreach (Neighbor n in Neighbors)
{
if (n.Node == target)
{
n.Warp = true;
n.Distance = 0.0f;
return;
}
}
}
public ObservableCollection<Node> GetInaccessibleNodes(Node n)
{
if (n == null) return new ObservableCollection<Node>();
ObservableCollection<Node> unreachableNodes = new ObservableCollection<Node>();
IEnumerable<Node> connectedNodes = n.ConnectedNodes;
var query = Nodes.Select(x => x).Where(y => connectedNodes.Contains(y) == false);
foreach (Node node in query)
{
unreachableNodes.Add(node);
}
return unreachableNodes;
}
public void AddNode(Node node)
{
Nodes.Add(node);
UpdateNodes();
OnNodeAdded(node);
}
public void UnsubscribeToNode(Node target)
{
target.PropertyChanged -= NodePropertyChanged;
}
public void SubscribeToNode(Node target)
{
target.PropertyChanged += NodePropertyChanged;
}
public void DisconnectNodeTwoWay(Node target)
{
target.DisconnectNode(this);
DisconnectNode(target);
}
public void DisconnectNode(Node target)
{
Neighbors.RemoveAll(x => x.Node == target);
//UnsubscribeToNode(target);
target.PropertyChanged -= NodePropertyChanged;
NotifyPropertyChanged("Neighbors");
}
public void ConnectToNodeTwoWay(Node target)
{
ConnectToNode(target);
target.ConnectToNode(this);
}
public ObservableCollection<Node> GetNonNeighbors(Node n)
{
if (n == null) return new ObservableCollection<Node>();
ObservableCollection<Node> nonNeighbors = new ObservableCollection<Node>();
List<Node> neighborNodes = new List<Node>();
neighborNodes.Add(n);
foreach (Neighbor neighbor in n.Neighbors)
{
neighborNodes.Add(neighbor.Node);
}
var query = Nodes.Select(x => x).Where(y => neighborNodes.Contains(y) == false);
foreach (Node node in query)
{
nonNeighbors.Add(node);
}
return nonNeighbors;
}
public PathModifiedEventArgs(Node node, List<Node> neighbors)
{
_node = node;
_neighbors = neighbors;
}
///<summary>
///Connects this node to the target node - distance calculations are also stored
///</summary>
public void ConnectToNode(Node target)
{
if (this == target) throw new Exception("Cannot connect node to itself");
//return if this target node is already in the neighbors list
foreach (Neighbor neighbor in Neighbors)
{
if (neighbor.Node == target) return;
}
Neighbors.Add(new Neighbor() { Node = target, Distance = Path.CalculateDistance(this, target) });
//SubscribeToNode(target);
target.PropertyChanged += NodePropertyChanged;
NotifyPropertyChanged("Neighbors");
}
