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