/// <summary>
/// Does collision detection between the shooter and the player
/// </summary>
/// <param name="shooter"></param>
static void BulletToPlayer(ServerPlayer shooter)
{
// Get the distance between the player and the shooter
foreach (ServerPlayer player in players)
{
// The shooter can't shoot themself, obviously.
if (player != shooter)
{
// If friendly fire is disabled and the player is
// on the same team, don't do collision detection
if (!friendlyFire && player.CurrentTeam == shooter.CurrentTeam)
{
continue;
}
// Get distance between the player and the enemy
Vector2 delta = player.Position - shooter.Position;
// Get -2Pi - 2Pi version of the shooter's angle
float angle = shooter.Rotation < 0 ? (float)(shooter.Rotation + (2 * Math.PI)) : shooter.Rotation;
// Get angle between shooter and player
float shooterToPlayerAngle = (float)Math.Atan2(delta.Y, delta.X);
// If the angle between the shooter and player is less than 0 radians
// add 2 Pi to convert it from -Pi - Pi domain to -2Pi - 2Pi domain
shooterToPlayerAngle = shooterToPlayerAngle < 0
? (float)(shooterToPlayerAngle + (2 * Math.PI))
: shooterToPlayerAngle;
// If the angle of the shooter is within 0.2 radians of the
// angle between the shooter and the player, it means they are
// not aiming in the opposite direction of the player which would
// result in the collision detection returning true
if (angle > shooterToPlayerAngle - 0.2f &&
angle < shooterToPlayerAngle + 0.2f)
{
// Get the direction of the shooter
Vector2 direction = new Vector2((float)Math.Cos(angle), (float)Math.Sin(angle));
// Get distance between the player and any possible obstacles in between the
// player and the enemy
RayCastResult result = raycaster.RayCastMethod(shooter.Position, direction, 1280,
MapData.TileMap, MapData.MapArea, angle);
// Get the delta between the collision point and the shooter
Vector2 raycastDistance = result.CollisionPos - shooter.Position;
// If the raycast had collided with an object in between two players
// the distance of the raycast would be shorter, therefore, the player
// has no direct line of sight with the other player
if (raycastDistance.Length() > delta.Length())
{
// If the shot passes through the player and they are alive
if (Collision.NonAACollision(shooter.Position,
shooter.Rotation, new Rectangle(
(int)player.Position.X - 16, (int)player.Position.Y + 16,
32, 32), player.Rotation) && player.State == ServerClientInterface.PlayerState.Alive)
{
// Deal the correct amount of damage depending on the weapon
switch (shooter.CurrentWeapon.Weapon)
{
case WeaponData.Weapon.Knife:
break;
case WeaponData.Weapon.Ak47:
player.Damage(12, 0);
break;
case WeaponData.Weapon.Glock:
break;
case WeaponData.Weapon.Awp:
break;
case WeaponData.Weapon.Usp:
break;
case WeaponData.Weapon.M4A1:
player.Damage(12, 0);
break;
}
Console.WriteLine("\"" + shooter.UserName + "\" shot \"" + player.UserName + " with " +
shooter.CurrentWeapon.Weapon);
// If the player's health is less than zero, they died. Let everyone know.
if (player.Health <= 0)
{
player.SetHealth(0);
player.SetArmor(0);
player.SetState(ServerClientInterface.PlayerState.Dead);
Console.WriteLine(shooter.UserName + " killed " + player.UserName +
" with " + shooter.CurrentWeapon.Weapon);
}
// Send data to all players
outMsg = server.CreateMessage();
outMsg.Write(ServerClientInterface.DAMAGE);
outMsg.Write(player.Identifier);
outMsg.Write(player.Health);
outMsg.Write(player.Armor);
server.SendToAll(outMsg, NetDeliveryMethod.UnreliableSequenced);
}
}
}
}
}
}
/// <summary>
/// Checks the collision for a player and their direction
/// </summary>
/// <param name="player"></param>
/// <param name="direction"></param>
/// <returns></returns>
static bool CheckPlayerCollision(ServerPlayer player, byte direction)
{
// If the player isn't currently a spectator
if (player.CurrentTeam != ServerClientInterface.Team.Spectator)
{
// If collision between player is enabled
if (enableCollision)
{
// Get the direection and adjust the movement speed
float vectorX = 0f;
float vectorY = 0f;
switch (direction)
{
case ServerClientInterface.MOVE_UP:
vectorY = -ServerClientInterface.MOVEMENT_SPEED;
break;
case ServerClientInterface.MOVE_DOWN:
vectorY = ServerClientInterface.MOVEMENT_SPEED;
break;
case ServerClientInterface.MOVE_LEFT:
vectorX = -ServerClientInterface.MOVEMENT_SPEED;
break;
case ServerClientInterface.MOVE_RIGHT:
vectorX = ServerClientInterface.MOVEMENT_SPEED;
break;
case ServerClientInterface.MOVE_UPRIGHT:
vectorX = ServerClientInterface.MOVEMENT_SPEED;
vectorY = -ServerClientInterface.MOVEMENT_SPEED;
break;
case ServerClientInterface.MOVE_DOWNRIGHT:
vectorX = ServerClientInterface.MOVEMENT_SPEED;
vectorY = ServerClientInterface.MOVEMENT_SPEED;
break;
case ServerClientInterface.MOVE_DOWNLEFT:
vectorX = -ServerClientInterface.MOVEMENT_SPEED;
vectorY = ServerClientInterface.MOVEMENT_SPEED;
break;
case ServerClientInterface.MOVE_UPLEFT:
vectorX = -ServerClientInterface.MOVEMENT_SPEED;
vectorY = -ServerClientInterface.MOVEMENT_SPEED;
break;
}
// Circle to Circle collision with the player wishing to move
// and every other player on the map. Returning false
// prevents the movement byte being sent to the player
foreach (ServerPlayer ply in players)
{
// If team collision is enabled, don't check players who are on the same team
if (!teamCollision && ply.CurrentTeam == player.CurrentTeam)
{
continue;
}
if (ply.Identifier != player.Identifier &&
ply.State != ServerClientInterface.PlayerState.Dead)
{
if (Collision.PlayerToPlayer(new Vector2(player.Position.X + vectorX,
player.Position.Y + vectorY), ply.Position, 23f))
{
return(false);
}
}
}
}
// Player to wall collision
// Gets the tiles that need to be checked
Tile[] tiles = GetTiles(player.Position, direction);
// Check each tile that is not null and is a solid
// Circle to Rectangle collision. Returns false
// if a collision is found
foreach (Tile tile in tiles)
{
if (tile != null && tile.Property == Tile.SOLID)
{
if (Collision.PlayerToRectangle(player.Position, tile.TileRect, 14f))
{
return(false);
}
}
}
// If no collisions occur, allow the player to move
return(true);
}
return(true);
}
/// <summary>
/// Respwans a player at their spawn point
/// </summary>
/// <param name="player"></param>
static void RespawnPlayer(ServerPlayer player)
{
// Default location
Vector2 location = Vector2.Zero;
// Randomly determine a spawn point depending on their team and
// respawns them there
int spawnPoint;
switch (player.CurrentTeam)
{
case ServerClientInterface.Team.CounterTerrorist:
while (true)
{
// Get a random index in the CT spawn points
spawnPoint = rand.Next(0, MapData.CTTile.Count);
bool empty = true;
// Check if nobody is currently on that spawn point
foreach (ServerPlayer ply in players)
{
if (ply.Identifier != player.Identifier)
{
if (MapData.CTTile[spawnPoint].TileRect.Contains((int)ply.Position.X,
(int)ply.Position.Y))
{
empty = false;
break;
}
}
}
if (empty)
{
location = new Vector2(MapData.CTTile[spawnPoint].TileRect.X + 16,
MapData.CTTile[spawnPoint].TileRect.Y + 16);
break;
}
}
break;
case ServerClientInterface.Team.Terrorist:
while (true)
{
// Get a random index in the T spawn points
spawnPoint = rand.Next(0, MapData.TTile.Count);
bool empty = true;
// Check if nobody is currently on that spawn point
foreach (ServerPlayer ply in players)
{
if (ply.Identifier != player.Identifier)
{
if (MapData.CTTile[spawnPoint].TileRect.Contains((int)ply.Position.X,
(int)ply.Position.Y))
{
empty = false;
break;
}
}
}
// If the spawn point is empty, allow the player to spawn there
if (empty)
{
location = new Vector2(MapData.TTile[spawnPoint].TileRect.X + 16,
MapData.TTile[spawnPoint].TileRect.Y + 16);
break;
}
}
break;
}
// Tell everyone the player respawned and their position
outMsg = server.CreateMessage();
player.Respawn(location);
outMsg.Write(ServerClientInterface.RESPAWN_PLAYER);
outMsg.Write(player.Identifier);
outMsg.Write(player.Position.X);
outMsg.Write(player.Position.Y);
server.SendToAll(outMsg, NetDeliveryMethod.ReliableSequenced);
}
/// <summary>
/// Updates and processes requests by users
/// </summary>
public static void UpdateNetwork()
{
// TODO : Updates the network, recieves input.
while ((msg = server.ReadMessage()) != null)
{
outMsg = server.CreateMessage();
ServerPlayer player;
byte code;
switch (msg.MessageType)
{
case NetIncomingMessageType.StatusChanged:
switch ((NetConnectionStatus)msg.ReadByte())
{
case NetConnectionStatus.Connected:
// If someone has successfully connected to the server, check
// if there are too many connected clients and prevent entry from
// the client if the number of users exceed the max number of players
if (numPlayers > maxPlayers)
{
msg.SenderConnection.Deny("Server Is Full");
}
// initialize handshake with the client. Give them a unique identifier
// which allows the server to differ between multiple clients
outMsg.Write(ServerClientInterface.HANDSHAKE);
// Send the message
server.SendMessage(outMsg, msg.SenderConnection, NetDeliveryMethod.ReliableSequenced);
break;
case NetConnectionStatus.Disconnected:
// Get the player that just disconnected
player =
players.Find(
ply => ply.ConnectionIdentifier == msg.SenderConnection.RemoteUniqueIdentifier);
// Tell everyone that the user disconnected
outMsg.Write(ServerClientInterface.PLAYER_DISCONNECTED);
outMsg.Write(player.Identifier);
server.SendToAll(outMsg, NetDeliveryMethod.ReliableSequenced);
// Subtract number of players of the associated team
switch (player.CurrentTeam)
{
case ServerClientInterface.Team.CounterTerrorist:
numCts--;
break;
case ServerClientInterface.Team.Terrorist:
numTs--;
break;
}
// Subtract one less player on the server
numPlayers--;
Console.WriteLine("\"" + player.UserName + "\" has left the server");
// Remove the player from the server
players.Remove(player);
break;
}
break;
case NetIncomingMessageType.Data:
// Get identifier byte used to determine message type
code = msg.ReadByte();
switch (code)
{
// A user requested to retrieve information of all players on server
case ServerClientInterface.REQUEST_SYNC:
string username = msg.ReadString();
// Set up a new player in the server
player = new ServerPlayer(username, playerIdentifier, msg.SenderConnection.RemoteUniqueIdentifier);
players.Add(player);
playerIdentifier++;
numPlayers++;
// Let the client know their information was recieved and processed
outMsg.Write(ServerClientInterface.HANDSHAKE_COMPLETE);
outMsg.Write(player.Identifier);
server.SendMessage(outMsg, msg.SenderConnection, NetDeliveryMethod.ReliableSequenced);
// Resend data about players to everyone in order to stay in sync
SyncCurrentPlayers();
Console.WriteLine("\"" + username + "\" has joined the server");
break;
case ServerClientInterface.CHANGE_TEAM:
// Find the player with the matching unique identifier
player = players.Find(
ply => ply.ConnectionIdentifier == msg.SenderConnection.RemoteUniqueIdentifier);
// Change their team
player.SetTeam(msg.ReadByte());
// Increase the number of players currently on the
// associated team
switch (player.CurrentTeam)
{
case ServerClientInterface.Team.CounterTerrorist:
numCts++;
break;
case ServerClientInterface.Team.Terrorist:
numTs++;
break;
}
// Tell everyone else that the player had switched teams and
// what team they switched to
outMsg.Write(ServerClientInterface.CHANGE_TEAM);
outMsg.Write(player.Identifier);
outMsg.Write(ServerClientInterface.TeamToByte(player.CurrentTeam));
server.SendToAll(outMsg, NetDeliveryMethod.ReliableSequenced);
Console.WriteLine("\"" + player.UserName + "\" joined the " + player.CurrentTeam);
break;
// Movement Processing for 8 directions
case ServerClientInterface.MOVE_UP:
case ServerClientInterface.MOVE_DOWN:
case ServerClientInterface.MOVE_LEFT:
case ServerClientInterface.MOVE_RIGHT:
case ServerClientInterface.MOVE_UPLEFT:
case ServerClientInterface.MOVE_UPRIGHT:
case ServerClientInterface.MOVE_DOWNRIGHT:
case ServerClientInterface.MOVE_DOWNLEFT:
Move(code, msg.SenderConnection.RemoteUniqueIdentifier);
break;
// Rotation processing
case ServerClientInterface.ROTATE_PLAYER:
Rotate(msg.ReadFloat(), msg.SenderConnection.RemoteUniqueIdentifier);
break;
// Weapon buying processing
case ServerClientInterface.BUY_WEAPON:
byte wep = msg.ReadByte();
SpawnWeapon(msg.SenderConnection.RemoteUniqueIdentifier, wep);
break;
// Weapon firing processing
case ServerClientInterface.FIRE_WEAPON:
FireWeapon(msg.SenderConnection.RemoteUniqueIdentifier);
break;
// Flashbang exploding processing
case ServerClientInterface.EXPLODE_FLASHBANG:
outMsg.Write(ServerClientInterface.EXPLODE_FLASHBANG);
server.SendToAll(outMsg, NetDeliveryMethod.UnreliableSequenced);
break;
// User requested respawn
case ServerClientInterface.REQUEST_RESPAWN:
// Client requested respawn
player =
players.Find(
ply => ply.ConnectionIdentifier == msg.SenderConnection.RemoteUniqueIdentifier);
// If they are dead, respawn the player
if (player.State == ServerClientInterface.PlayerState.Dead)
{
RespawnPlayer(player);
}
break;
}
break;
}
}
}
/// <summary>
/// Creates a new weapon
/// </summary>
/// <param name="weapon"></param>
/// <param name="owner"></param>
public ServerWeapon(WeaponData.Weapon weapon, ServerPlayer owner)
{
Owner = owner;
Weapon = weapon;
Fired = false;
}
/// <summary>
/// Allows a player to pickup the weapon
/// </summary>
/// <param name="owner"></param>
public void Pickup(ServerPlayer owner)
{
Owner = owner;
}