Dogcows Code - chaz/carfire/blob - CarFire/CarFire/CarFire/Game.cs

   1 using System;
   2 using System.Collections.Generic;
   3 using System.Linq;
   4 using System.Text;
   5 using Microsoft.Xna.Framework;
   6 using Microsoft.Xna.Framework.Content;
   7 using Microsoft.Xna.Framework.Graphics;
   8 using Microsoft.Xna.Framework.Input;
   9
  10 namespace CarFire
  11 {
  12     /// <summary>
  13     /// Container class for the whole state of the game.
  14     /// </summary>
  15     public class GameState
  16     {
  17         #region Public Properties
  18
  19         public long FrameNumber { get { return mFrameNumber; } }
  20
  21         public long Checksum { get { return mChecksum; } }
  22
  23         public int NumberOfPlayers { get { return mNumberOfPlayers; } }
  24
  25         public Map Map;
  26         public List<IEntity> Entities = new List<IEntity>();
  27         public List<Projectile> mProjectiles = new List<Projectile>();
  28         public Player[] mCharacters;
  29         public Display mDisplay;
  30
  31         #endregion
  32
  33
  34         #region Public Methods
  35
  36         /// <summary>
  37         /// Construct a game state container with the number of players.
  38         /// </summary>
  39         /// <param name="numPlayers">Number of players.</param>
  40         public GameState(int numPlayers)
  41         {
  42             mNumberOfPlayers = numPlayers;
  43             mFrameNumber = 0;
  44
  45             mCharacters = new Player[numPlayers];
  46
  47             mIsGameOver = new bool[numPlayers];
  48             mIsTerminated = new bool[numPlayers];
  49
  50             mMouseLocation = new Point[numPlayers];
  51             mMouseButton = new bool[numPlayers];
  52             mKeysDown = new List<Keys>[numPlayers];
  53             for (int i = 0; i < numPlayers; i++) mKeysDown[i] = new List<Keys>();
  54
  55             mKeypressCount = new int[numPlayers];
  56             mElapsedTime = 0;
  57             mChecksum = 0;
  58         }
  59
  60
  61         /// <summary>
  62         /// Should be called by the Game class to advance the state
  63         /// to the next frame.
  64         /// </summary>
  65         /// <param name="inputs">The inputs that occurred to be
  66         /// applied this coming frame.</param>
  67         /// <param name="milliseconds">Milliseconds; used for the checksum.</param>
  68         public void AdvanceFrame(NextInputs inputs, long milliseconds)
  69         {
  70             mFrameNumber++;
  71             mElapsedTime += milliseconds;
  72
  73             for (int player = 0; player < NumberOfPlayers; player++)
  74             {
  75                 if (inputs.IsMousePressedChanged[player])
  76                 {
  77                     mMouseButton[player] = inputs.MousePressed[player];
  78                 }
  79
  80                 if (inputs.IsMouseLocationChanged[player])
  81                 {
  82                     mMouseLocation[player] = inputs.MouseLocation[player];
  83                 }
  84
  85                 foreach (Keys k in inputs.KeysPressed[player])
  86                 {
  87                     if (!mKeysDown[player].Contains(k))
  88                     {
  89                         mKeysDown[player].Add(k);
  90                         mKeypressCount[player]++;
  91                     }
  92                 }
  93
  94                 foreach (Keys k in inputs.KeysReleased[player]) mKeysDown[player].Remove(k);
  95             }
  96
  97             ComputeChecksum();
  98         }
  99
 100
 101         /// <summary>
 102         /// Get the mouse location for a player.
 103         /// </summary>
 104         /// <param name="playerNum">Player Number.</param>
 105         /// <returns>Mouse location.</returns>
 106         public Point GetMouseLocation(int playerNum)
 107         {
 108             return mMouseLocation[playerNum];
 109         }
 110
 111         /// <summary>
 112         /// Get the mouse button state for a player.
 113         /// </summary>
 114         /// <param name="playerNum">Player number.</param>
 115         /// <returns>Mouse button state..</returns>
 116         public bool GetMouseButton(int playerNum)
 117         {
 118             return mMouseButton[playerNum];
 119         }
 120
 121         /// <summary>
 122         /// Get the keyboard state for a player.
 123         /// </summary>
 124         /// <param name="playerNum">Player number.</param>
 125         /// <returns>Keyboard state.</returns>
 126         public List<Keys> GetKeysDown(int playerNum)
 127         {
 128             return mKeysDown[playerNum];
 129         }
 130
 131         #endregion
 132
 133
 134         #region Private Methods
 135
 136         // Calculates a checksum for debugging network synchronization issues.
 137         long ComputeChecksum()
 138         {
 139             mChecksum += FrameNumber;
 140             for (int i = 0; i < NumberOfPlayers; i++)
 141             {
 142                 mChecksum = mChecksum + mKeypressCount[i];
 143                 mChecksum = mChecksum * 3 + (mIsGameOver[i] ? 1 : 2);
 144                 mChecksum = mChecksum * 3 + (mIsTerminated[i] ? 1 : 2);
 145                 foreach (Keys k in mKeysDown[i])
 146                     mChecksum = mChecksum * 257 + (int)k;
 147                 mChecksum = mChecksum * 25789 + mMouseLocation[i].X * 259 + mMouseLocation[i].Y + 375;
 148                 mChecksum = mChecksum * 3 + (mMouseButton[i] ? 1 : 2);
 149
 150             }
 151             mChecksum += mElapsedTime;
 152
 153             return mChecksum;
 154         }
 155
 156         #endregion
 157
 158
 159         #region Private Variables
 160
 161         int mNumberOfPlayers;
 162         public Point[] mMouseLocation;
 163         public bool[] mMouseButton;
 164         public List<Keys>[] mKeysDown;
 165
 166         long mFrameNumber;
 167
 168         bool[] mIsGameOver;
 169         bool[] mIsTerminated;
 170
 171         int[] mKeypressCount;
 172         long mElapsedTime;
 173         long mChecksum;
 174
 175         #endregion
 176     }
 177
 178     /// <summary>
 179     /// Container class for all the inputs for a single frame.
 180     /// </summary>
 181     public class NextInputs
 182     {
 183         public List<Keys>[] KeysPressed;
 184         public List<Keys>[] KeysReleased;
 185         public Point[] MouseLocation;
 186         public bool[] IsMouseLocationChanged;
 187         public bool[] MousePressed;
 188         public bool[] IsMousePressedChanged;
 189
 190         public NextInputs(int numPlayers)
 191         {
 192             KeysPressed = new List<Keys>[numPlayers];
 193             KeysReleased = new List<Keys>[numPlayers];
 194             IsMouseLocationChanged = new bool[numPlayers];
 195             MousePressed = new bool[numPlayers];
 196             IsMousePressedChanged = new bool[numPlayers];
 197             for (int i = 0; i < numPlayers; i++) KeysPressed[i] = new List<Keys>();
 198             for (int i = 0; i < numPlayers; i++) KeysReleased[i] = new List<Keys>();
 199         }
 200     }
 201
 202
 203     /// <summary>
 204     /// The big kahuna.
 205     /// </summary>
 206     public class Game : IDeterministicGame
 207     {
 208         #region Public Properties
 209
 210         /// <summary>
 211         /// Get the content manager associated with this game.
 212         /// </summary>
 213         public ContentManager ContentManager { get { return mContentManager; } }
 214
 215         /// <summary>
 216         /// Get the state.
 217         /// </summary>
 218         public GameState State;
 219
 220         public bool[,] Grid
 221         {
 222             get
 223             {
 224                 bool[,] grid = State.Map.Grid;
 225                 foreach (IEntity entity in State.Entities)
 226                 {
 227                     Point coordinates = entity.Coordinates;
 228                     if (State.Map.IsCellOpen(coordinates)) grid[coordinates.X, coordinates.Y] = false;
 229                 }
 230                 return grid;
 231             }
 232         }
 233
 234         #endregion
 235
 236
 237         #region Public Methods
 238
 239         public IEntity GetEntityAtCoordinates(Point point)
 240         {
 241             foreach (IEntity entity in State.Entities)
 242             {
 243                 if (entity.Coordinates == point) return entity;
 244             }
 245             return null;
 246         }
 247
 248         public Player GetPlayerAtCoordinates(Point point)
 249         {
 250             foreach (Player player in State.mCharacters)
 251             {
 252                 if (player != null && player.Coordinates == point) return player;
 253             }
 254             return null;
 255         }
 256
 257         public bool IsCellOpen(Point point)
 258         {
 259             if (!State.Map.IsCellOpen(point)) return false;
 260             if (GetEntityAtCoordinates(point) != null) return false;
 261             return true;
 262         }
 263
 264         public Game()
 265         {
 266
 267         }
 268         /// <summary>
 269         /// This method should be called whenever the players want to move to a new map.
 270         /// Not implemented yet.  Need some way to get next map.
 271         /// </summary>
 272         public void startNewMap()
 273         {
 274             //TODO somehow get next map
 275             State.Entities.Clear();
 276             //State.Map = State.Map.getNextMap();
 277             for (int i = 0; i < State.mCharacters.Length; i++)
 278             {
 279                 State.mCharacters[i].Coordinates = State.Map.GetStartingPositionForPlayer(i + 1);
 280             }
 281             State.Entities = State.Map.GetAllEntities(this);
 282         }
 283         public void LoadContent(ContentManager contentManager)
 284         {
 285             mContentManager = contentManager;
 286             menu = mContentManager.Load<SpriteFont>("menuFont");
 287
 288         }
 289
 290         public void UnloadContent()
 291         {
 292         }
 293
 294         private int GetPlayerNumber(Object playerIdentifier)
 295         {
 296             for (int i = 0; i < mPlayerIdentifiers.Length; i++)
 297             {
 298                 if (mPlayerIdentifiers[i] == playerIdentifier) return i;
 299             }
 300             throw new Exception("Illegal player identifier" + playerIdentifier);
 301         }
 302
 303         public Vector2 PreferredScreenSize
 304         {
 305             get { return new Vector2(800, 600); }
 306         }
 307
 308         public int MinimumSupportedPlayers
 309         {
 310             get { return 1; }
 311         }
 312
 313         public int MaximumSupportedPlayers
 314         {
 315             get { return 4; }
 316         }
 317
 318         public void ResetGame(object[] playerIdentifiers, object thisPlayer)
 319         {
 320             int numPlayers = playerIdentifiers.Count();
 321
 322             mPlayerIdentifiers = new object[numPlayers];
 323             for (int i = 0; i < numPlayers; i++) mPlayerIdentifiers[i] = playerIdentifiers[i];
 324
 325             mThisPlayerID = GetPlayerNumber(thisPlayer);
 326
 327             State = new GameState(numPlayers);
 328             mInputs = new NextInputs(numPlayers);
 329             State.mDisplay = new Display(this);
 330             State.mDisplay.LoadContent(mContentManager);
 331
 332             State.Map = mContentManager.Load<Map>("Maps/level1");
 333             State.Entities = State.Map.GetAllEntities(this);
 334             Map.DefaultTile = mContentManager.Load<Texture2D>("default");
 335
 336             /*
 337             mPlayers.Clear();
 338             for (int i = 0; i < PlayerIdentifiers.Length; i++)
 339             {
 340                 Human player = new Human(mMap, "");
 341                 mPlayers.Add(player);
 342                 mDisplay.AddCharacters(player);
 343                 mPlayers.Add(player);
 344                 mDisplay.AddCharacters(player);
 345             }
 346             this.playerIdentifiers = PlayerIdentifiers;
 347             for (int i = 0; i < mPlayers.Count; i++)
 348             {
 349                 Point starting = mMap.GetStartingPositionForPlayer(i + 1);
 350                 mPlayers[i].Spawn(new Vector2(starting.X, starting.Y));
 351             }
 352             */
 353         }
 354
 355         public long CurrentFrameNumber
 356         {
 357             get { return State.FrameNumber; }
 358         }
 359
 360         public long CurrentChecksum
 361         {
 362             get { return 0; }
 363         }
 364
 365         public void ApplyKeyInput(object playerIdentifier, Keys key, bool isKeyPressed)
 366         {
 367             //code from Prof Jensen's TestHarness
 368             int player = GetPlayerNumber(playerIdentifier);
 369
 370             if (isKeyPressed && !mInputs.KeysPressed[player].Contains(key))
 371                 mInputs.KeysPressed[player].Add(key);
 372
 373             if (!isKeyPressed && !mInputs.KeysReleased[player].Contains(key))
 374                 mInputs.KeysReleased[player].Add(key);
 375
 376         }
 377
 378         public void ApplyMouseLocationInput(object playerIdentifier, int x, int y)
 379         {
 380
 381         }
 382
 383         public void ApplyMouseButtonInput(object playerIdentifier, bool isButtonPressed)
 384         {
 385
 386         }
 387
 388         public bool IsGameOver(object playerIdentifier)
 389         {
 390             return false;
 391         }
 392
 393         public bool IsTerminated(object playerIdentifier)
 394         {
 395             return false;
 396         }
 397
 398         public long Update(TimeSpan elapsedTime)
 399         {
 400             State.AdvanceFrame(mInputs, elapsedTime.Milliseconds);  // Apply the inputs, advance game state.
 401             State.mDisplay.Update(elapsedTime, mThisPlayerID);
 402             State.Entities.ForEach(delegate(IEntity e) { e.Update(elapsedTime); });
 403             mInputs = new NextInputs(State.NumberOfPlayers);  // Start with inputs cleared on the next frame.
 404             //mDisplay.Update(elapsedTime);
 405             return State.FrameNumber;
 406
 407         }
 408
 409         public long Draw(SpriteBatch spriteBatch)
 410         {
 411             bool allCharactersSelected = true;
 412             for (int i = 0; i < State.NumberOfPlayers; i++)
 413             {
 414                 //If player has not selected a player yet let them select one.
 415                 if (State.mCharacters[i] == null)
 416                 {
 417                     allCharactersSelected = false;
 418                     if (State.GetKeysDown(i).Contains(Keys.M))
 419                     {
 420                         State.mCharacters[i] = new Melee(this, "", State.Map.GetStartingPositionForPlayer(i + 1), i);
 421                         State.mCharacters[i].LoadContent(mContentManager);
 422                     }
 423                     else if (State.GetKeysDown(i).Contains(Keys.R))
 424                     {
 425                         State.mCharacters[i] = new Ranged(this, "", State.Map.GetStartingPositionForPlayer(i + 1), i);
 426                         State.mCharacters[i].LoadContent(mContentManager);
 427                     }
 428                 }
 429             }
 430             if (allCharactersSelected)
 431             {
 432
 433                 State.mDisplay.Draw(spriteBatch);
 434             }
 435             else
 436             {
 437                 spriteBatch.GraphicsDevice.Clear(Color.Black);
 438                 spriteBatch.DrawString(menu, "Press R to select a Ranged Character and M to select a Melee Character", new Vector2(30, 30), Color.RosyBrown);
 439             }
 440             return CurrentFrameNumber;
 441         }
 442
 443         #endregion
 444
 445
 446         #region Private Variables
 447
 448         SpriteFont menu;
 449
 450         ContentManager mContentManager;
 451         NextInputs mInputs;
 452
 453         Object[] mPlayerIdentifiers;
 454         int mThisPlayerID;
 455
 456         #endregion
 457     }
 458 }