public bool IsNeigbor(NodeuC node)
{
float dx = node.Position.X - Position.X;
float dy = node.Position.Y - Position.Y;
return(((dx * dx) + (dy * dy) < Range * Range) && node.NodeAddress != this.NodeAddress);
}
public Game1()
{
graphics = new GraphicsDeviceManager(this);
Content.RootDirectory = "Content";
IsMouseVisible = true;
Random ran = new Random();
int[] locations = { 100, 200,
175, 200,
250, 200,
325, 200,
400, 200,
475, 200 };
int height = Window.ClientBounds.Height - 30;
int width = Window.ClientBounds.Width - 30;
int numberOfNodes = 10;//MAX = 255
int size = (int)MathHelper.Clamp(29f - 0.040f * (float)numberOfNodes, 20, 40);
for (int i = 0; i < numberOfNodes; i++)
{
NodeuC node = new NodeuC(size);
int margin = node.Size / 2;
if (locations.Length > 2 * i)
{
node.Position = new Vector2(locations[2 * i], locations[(2 * i) + 1]);
}
else
{
node.Position = new Vector2(ran.Next(margin, width - margin), ran.Next(margin, height - node.Size * 5));
}
node.NodeAddress = (byte)(i + 1);
Program.NodeListuC.Add(node);
}
graphics.PreferredBackBufferWidth = Window.ClientBounds.Width + rightMargin;
Window.AllowUserResizing = true;
}
public Game1()
{
graphics = new GraphicsDeviceManager(this);
Content.RootDirectory = "Content";
IsMouseVisible = true;
Random ran = new Random();
int[] locations = { 100, 200,
175, 200,
250, 200,
325, 200,
400, 200,
475, 200
};
int height = Window.ClientBounds.Height - 30;
int width = Window.ClientBounds.Width - 30;
int numberOfNodes = 10;//MAX = 255
int size = (int)MathHelper.Clamp(29f-0.040f*(float)numberOfNodes, 20, 40);
for (int i = 0; i < numberOfNodes; i++)
{
NodeuC node = new NodeuC(size);
int margin = node.Size / 2;
if (locations.Length > 2 * i)
node.Position = new Vector2(locations[2 * i], locations[(2 * i) + 1]);
else
node.Position = new Vector2(ran.Next(margin, width - margin), ran.Next(margin, height - node.Size * 5));
node.NodeAddress = (byte)(i + 1);
Program.NodeListuC.Add(node);
}
graphics.PreferredBackBufferWidth = Window.ClientBounds.Width + rightMargin;
Window.AllowUserResizing = true;
}
private void LookFor(byte reference, byte neighborInterested, byte rootInterested, byte distance) //RootInterested represent the first interesed, who start the interrogation
{
//This occur when many neighbors ask for the same node
if (LookTable.ContainsKey(reference))
{
return;
}
//This check prevents a node with no neighbors store a search in lookTable
if (neighborInterested == 0 || NeighborsTable.Count > 1)
{
LookTable.Add(reference, new byte[] { neighborInterested, 0, (byte)(distance - 1) });
//Send RouteAnswer to everyone in NeighborsTable != neighborInterested
lock (NeighborsTable)
{
foreach (byte neigborAddress in NeighborsTable)
{
if (neigborAddress != neighborInterested)
{
NodeuC neigbor = Program.GetNode(neigborAddress);
ROUTE_MSG routeAnswer = new ROUTE_MSG();
routeAnswer.header_distance = distance;
routeAnswer.header_restype = 1; //ANSWER
routeAnswer.header_type = 0; //ROUTE
routeAnswer.from = rootInterested;
routeAnswer.to = neigborAddress;
routeAnswer.parent = NodeAddress;
routeAnswer.reference = reference;
neigbor.SendMessage(routeAnswer);
}
}
}
}
}
protected override void Update(GameTime gameTime)
{
MouseState mouse = Mouse.GetState();
KeyboardState currentKeyboardState = Keyboard.GetState();
if (CheckKeyReleased(Keys.P, currentKeyboardState, previousKeyboardState))
pauseSim = !pauseSim;
//Restore color nodes
if (CheckKeyReleased(Keys.C, currentKeyboardState, previousKeyboardState))
{
foreach (NodeuC node in Program.NodeListuC)
node.Color = Color.DarkBlue;
}
//Reset route tables
if (CheckKeyReleased(Keys.R, currentKeyboardState, previousKeyboardState))
{
foreach (NodeuC node in Program.NodeListuC)
node.RouteTable.Clear();
}
if (CheckKeyReleased(Keys.Add, currentKeyboardState, previousKeyboardState))
Program.SleepDelay = Math.Min(1000, Program.SleepDelay + 100);
else if (CheckKeyReleased(Keys.Subtract, currentKeyboardState, previousKeyboardState))
Program.SleepDelay = Math.Max(100, Program.SleepDelay - 100);
Window.Title = "Simulation delay: " + Program.SleepDelay + "ms";
// Allows the game to exit
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
this.Exit();
bool leftPressed = mouse.LeftButton == ButtonState.Pressed;
bool rightClick = mouse.RightButton == ButtonState.Pressed && mouseLast.RightButton == ButtonState.Released;
Vector2 mousePosition = new Vector2(mouse.X, mouse.Y);
bool selected = false;
foreach (var node in Program.NodeListuC)
{
node.ShowAddress = node.ContainsPoint(mousePosition);
node.Paused = pauseSim;
if (!selected && leftPressed && (node.ContainsPoint(mousePosition) || node.IsSelected))
{
if(mouse.X < Window.ClientBounds.Width - rightMargin)
node.Position = mousePosition;
node.IsSelected = true;
selected = true;
}
else
{
node.IsSelected = false;
}
if (rightClick && node.ContainsPoint(mousePosition))
{
if (selectedNode == null) //First click
{
selectedNode = node;
node.Color = Color.Pink;
}
else //Second click
{
if (node != selectedNode)
{
selectedNode.Color = Color.DarkBlue;
Program.init = DateTime.Now;
selectedNode.Transmit(node.NodeAddress, "HOLA");
}
selectedNode = null;
}
}
node.Update();
}
mouseLast = mouse;
previousKeyboardState = currentKeyboardState;
// TODO: Add your update logic here
base.Update(gameTime);
}
private void loop()
{
TimeSpan iterationTime = new TimeSpan(DateTime.Now.Ticks);
refreshNeigbors();
if (routeBuffer.Count > 0) //check the outstanding route messages
{
ROUTE_MSG message = routeBuffer[0];
if (message.header_restype == 1) //Route Answer
{
bool isNeighbor = NeighborsTable.Contains(message.reference);
//Check if the first variable returns true, because in this case the second search is not needed
if (isNeighbor || RouteTable.ContainsKey(message.reference))
{
ROUTE_MSG routeResponse = new ROUTE_MSG();
if (isNeighbor)
{
routeResponse.header_distance = 1;
}
else
{
routeResponse.header_distance = (byte)(RouteTable[message.reference][1] + 1);
}
routeResponse.header_restype = 0; //RESPONSE
routeResponse.header_type = 0; //ROUTE
routeResponse.header_ok = 1;
routeResponse.from = NodeAddress;
routeResponse.to = message.from;
routeResponse.parent = NodeAddress;
routeResponse.reference = message.reference;
NodeuC Dest = Program.GetNode(message.parent);
Dest.SendMessage(routeResponse);
//TODO: Notify the node sought to avoid a possible subsequent search in the opposite
routeResponse.header_distance = (byte)(message.header_distance + 1);
routeResponse.from = NodeAddress;
routeResponse.to = message.reference;
routeResponse.parent = NodeAddress;
routeResponse.reference = message.from;
Dest = Program.GetNode(isNeighbor ? message.reference : RouteTable[message.reference][0]);
Dest.SendMessage(routeResponse);
addToRouteTable(message.from, message.parent, message.header_distance);
}
else
{
LookFor(message.reference, message.parent, message.from, (byte)(message.header_distance + 1));
}
Color = Color.Yellow;
}
else //Route Response
{
if (message.header_ok > 0)
{
addToRouteTable(message.reference, message.parent, message.header_distance);
if (LookTable.ContainsKey(message.reference))
{
byte interested = LookTable[message.reference][0];
if (interested != 0)
{
ROUTE_MSG routeResponse = new ROUTE_MSG();
routeResponse.header_distance = (byte)(message.header_distance + 1);
routeResponse.header_restype = 0; //RESPONSE
routeResponse.header_type = 0; //ROUTE
routeResponse.header_ok = 1;
routeResponse.from = message.from;
routeResponse.to = message.to;
routeResponse.parent = NodeAddress;
routeResponse.reference = message.reference;
NodeuC Dest = Program.GetNode(interested);
Dest.SendMessage(routeResponse);
//Store the way back if distance > 0 (message.to is not a neighbor)
byte distance = LookTable[message.reference][2];
if (distance > 0)
{
addToRouteTable(message.to, interested, distance);
}
}
LookTable.Remove(message.reference);
Color = Color.Purple;
}
}
//This case is given when it tried to route a message from a node that is no longer able to reach the recipient.
else if (RouteTable.ContainsKey(message.reference) && RouteTable[message.reference][0] == message.parent)
{
RouteTable.Remove(message.reference);
//Notify the neighbors that I can't reach the intended recipient
foreach (var neighborAddress in NeighborsTable)
{
if (message.parent != neighborAddress)
{
ROUTE_MSG routeResponse = new ROUTE_MSG();
routeResponse.header_restype = 0; //RESPONSE
routeResponse.header_type = 0; //ROUTE
routeResponse.header_ok = 0; //FAIL
routeResponse.header_distance = message.header_distance;
routeResponse.from = NodeAddress;
routeResponse.to = message.to;
routeResponse.parent = NodeAddress;
routeResponse.reference = message.reference;
NodeuC Dest = Program.GetNode(neighborAddress);
Dest.SendMessage(routeResponse);
}
}
//TODO: If there are pending messages for this node, try to trace a new route
if (message.to == NodeAddress)
{
Program.MessageBoxCustom("Ha cambiado la topología de la red. Reenviar", "MESSAGE " + message.header_distance +
" FROM " + NodeAddress + " TO " + message.reference + " ");
}
}
}
routeBuffer.Remove(message);
}
if (dataInputBuffer.Count > 0)//Data messages to read
{
Color = Color.YellowGreen;
DATA_MSG message = dataInputBuffer[0];
bool isNeighbor;
if (message.to == NodeAddress) //it's to me?
{
Color = Color.Magenta;
message.data += NodeAddress;
Program.MessageBoxCustom(message.data, "MESSAGE " + message.header_id +
" FROM " + message.from + " TO " + message.to + " BY " + message.parent + " ");
}
else if ((isNeighbor = NeighborsTable.Contains(message.to)) || RouteTable.ContainsKey(message.to))
{
message.parent = NodeAddress;
message.data += NodeAddress + " -> ";
NodeuC Dest = Program.GetNode(isNeighbor ? message.to : RouteTable[message.to][0]);
Dest.SendMessage(message);
}
else
{
ROUTE_MSG routeResponse = new ROUTE_MSG();
routeResponse.header_restype = 0; //RESPONSE
routeResponse.header_type = 0; //ROUTE
routeResponse.header_ok = 0; //FAIL
routeResponse.header_distance = message.header_id; //Use the length field to store the id of the failed message
routeResponse.from = NodeAddress;
routeResponse.to = message.from;
routeResponse.parent = NodeAddress;
routeResponse.reference = message.to;
NodeuC Dest = Program.GetNode(message.parent);
Dest.SendMessage(routeResponse);
}
dataInputBuffer.Remove(message);
}
if (dataOutputBuffer.Count > 0)//Messages to send
{
List <DATA_MSG> items = dataOutputBuffer.ToList();
foreach (var message in items)
{
if (!LookTable.ContainsKey(message.to))//Look finished
{
transmitRF(message);
dataOutputBuffer.Remove(message);
}
else if (LookTable[message.to][1] >= TIMEOUT)
{
Program.MessageBoxCustom("Timeout superado", "MESSAGE FROM " + message.from + " TO " + message.to + " ");
dataOutputBuffer.Remove(message);
LookTable.Remove(message.to);
}
}
}
int diff = (int)(iterationTime - lastLookTableUpdate).TotalMilliseconds;
if (diff > 1000 && LookTable.Count > 0) //Check the pending searches every second
{
foreach (var item in LookTable.ToList())
{
byte reference = item.Key;
byte counter = item.Value[1];
if (counter < TIMEOUT)
{
LookTable[reference][1]++;
}
else
{
LookTable.Remove(reference); //TIMEOUT limit exceeded
}
}
lastLookTableUpdate = iterationTime;
}
}
public bool IsNeigbor(NodeuC node)
{
float dx = node.Position.X - Position.X;
float dy = node.Position.Y - Position.Y;
return ((dx * dx) + (dy * dy) < Range * Range) && node.NodeAddress != this.NodeAddress;
}
protected override void Update(GameTime gameTime)
{
MouseState mouse = Mouse.GetState();
KeyboardState currentKeyboardState = Keyboard.GetState();
if (CheckKeyReleased(Keys.P, currentKeyboardState, previousKeyboardState))
{
pauseSim = !pauseSim;
}
//Restore color nodes
if (CheckKeyReleased(Keys.C, currentKeyboardState, previousKeyboardState))
{
foreach (NodeuC node in Program.NodeListuC)
{
node.Color = Color.DarkBlue;
}
}
//Reset route tables
if (CheckKeyReleased(Keys.R, currentKeyboardState, previousKeyboardState))
{
foreach (NodeuC node in Program.NodeListuC)
{
node.RouteTable.Clear();
}
}
if (CheckKeyReleased(Keys.Add, currentKeyboardState, previousKeyboardState))
{
Program.SleepDelay = Math.Min(1000, Program.SleepDelay + 100);
}
else if (CheckKeyReleased(Keys.Subtract, currentKeyboardState, previousKeyboardState))
{
Program.SleepDelay = Math.Max(100, Program.SleepDelay - 100);
}
Window.Title = "Simulation delay: " + Program.SleepDelay + "ms";
// Allows the game to exit
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
{
this.Exit();
}
bool leftPressed = mouse.LeftButton == ButtonState.Pressed;
bool rightClick = mouse.RightButton == ButtonState.Pressed && mouseLast.RightButton == ButtonState.Released;
Vector2 mousePosition = new Vector2(mouse.X, mouse.Y);
bool selected = false;
foreach (var node in Program.NodeListuC)
{
node.ShowAddress = node.ContainsPoint(mousePosition);
node.Paused = pauseSim;
if (!selected && leftPressed && (node.ContainsPoint(mousePosition) || node.IsSelected))
{
if (mouse.X < Window.ClientBounds.Width - rightMargin)
{
node.Position = mousePosition;
}
node.IsSelected = true;
selected = true;
}
else
{
node.IsSelected = false;
}
if (rightClick && node.ContainsPoint(mousePosition))
{
if (selectedNode == null) //First click
{
selectedNode = node;
node.Color = Color.Pink;
}
else //Second click
{
if (node != selectedNode)
{
selectedNode.Color = Color.DarkBlue;
Program.init = DateTime.Now;
selectedNode.Transmit(node.NodeAddress, "HOLA");
}
selectedNode = null;
}
}
node.Update();
}
mouseLast = mouse;
previousKeyboardState = currentKeyboardState;
// TODO: Add your update logic here
base.Update(gameTime);
}
