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             menu = mContentManager.Load<SpriteFont>("menuFont");
 254
 255         }
 256
 257         public void UnloadContent()
 258         {
 259         }
 260
 261         private int GetPlayerNumber(Object playerIdentifier)
 262         {
 263             for (int i = 0; i < mPlayerIdentifiers.Length; i++)
 264             {
 265                 if (mPlayerIdentifiers[i] == playerIdentifier) return i;
 266             }
 267             throw new Exception("Illegal player identifier" + playerIdentifier);
 268         }
 269
 270         public Vector2 PreferredScreenSize
 271         {
 272             get { return new Vector2(800, 600); }
 273         }
 274
 275         public int MinimumSupportedPlayers
 276         {
 277             get { return 1; }
 278         }
 279
 280         public int MaximumSupportedPlayers
 281         {
 282             get { return 4; }
 283         }
 284
 285         public void ResetGame(object[] playerIdentifiers, object thisPlayer)
 286         {
 287             int numPlayers = playerIdentifiers.Count();
 288
 289             mPlayerIdentifiers = new object[numPlayers];
 290             for (int i = 0; i < numPlayers; i++) mPlayerIdentifiers[i] = playerIdentifiers[i];
 291
 292             mThisPlayerID = GetPlayerNumber(thisPlayer);
 293
 294             State = new GameState(numPlayers);
 295             mInputs = new NextInputs(numPlayers);
 296             State.mDisplay = new Display(this);
 297             State.mDisplay.LoadContent(mContentManager);
 298
 299             State.Map = mContentManager.Load<Map>("Maps/stable");
 300             State.Map.Game = this;
 301             State.Entities = State.Map.GetAllEntities();
 302             Map.DefaultTile = mContentManager.Load<Texture2D>("default");
 303
 304             /*
 305             mPlayers.Clear();
 306             for (int i = 0; i < PlayerIdentifiers.Length; i++)
 307             {
 308                 Human player = new Human(mMap, "");
 309                 mPlayers.Add(player);
 310                 mDisplay.AddCharacters(player);
 311                 mPlayers.Add(player);
 312                 mDisplay.AddCharacters(player);
 313             }
 314             this.playerIdentifiers = PlayerIdentifiers;
 315             for (int i = 0; i < mPlayers.Count; i++)
 316             {
 317                 Point starting = mMap.GetStartingPositionForPlayer(i + 1);
 318                 mPlayers[i].Spawn(new Vector2(starting.X, starting.Y));
 319             }
 320             */
 321         }
 322
 323         public long CurrentFrameNumber
 324         {
 325             get { return State.FrameNumber; }
 326         }
 327
 328         public long CurrentChecksum
 329         {
 330             get { return 0; }
 331         }
 332
 333         public void ApplyKeyInput(object playerIdentifier, Keys key, bool isKeyPressed)
 334         {
 335             //code from Prof Jensen's TestHarness
 336             int player = GetPlayerNumber(playerIdentifier);
 337
 338             if (isKeyPressed && !mInputs.KeysPressed[player].Contains(key))
 339                 mInputs.KeysPressed[player].Add(key);
 340
 341             if (!isKeyPressed && !mInputs.KeysReleased[player].Contains(key))
 342                 mInputs.KeysReleased[player].Add(key);
 343
 344         }
 345
 346         public void ApplyMouseLocationInput(object playerIdentifier, int x, int y)
 347         {
 348
 349         }
 350
 351         public void ApplyMouseButtonInput(object playerIdentifier, bool isButtonPressed)
 352         {
 353
 354         }
 355
 356         public bool IsGameOver(object playerIdentifier)
 357         {
 358             return false;
 359         }
 360
 361         public bool IsTerminated(object playerIdentifier)
 362         {
 363             return false;
 364         }
 365
 366         public long Update(TimeSpan elapsedTime)
 367         {
 368             State.AdvanceFrame(mInputs, elapsedTime.Milliseconds);  // Apply the inputs, advance game state.
 369             State.mDisplay.Update(elapsedTime, State, mThisPlayerID);
 370             State.Entities.ForEach(delegate(IEntity e) { e.Update(elapsedTime); });
 371             mInputs = new NextInputs(State.NumberOfPlayers);  // Start with inputs cleared on the next frame.
 372             //mDisplay.Update(elapsedTime);
 373             return State.FrameNumber;
 374
 375         }
 376
 377         public long Draw(SpriteBatch spriteBatch)
 378         {
 379             bool allCharactersSelected = true;
 380             for (int i = 0; i < State.NumberOfPlayers; i++)
 381             {
 382                 //If player has not selected a player yet let them select one.
 383                 if (State.mCharacters[i] == null)
 384                 {
 385                     allCharactersSelected = false;
 386                     if (State.GetKeysDown(i).Contains(Keys.Enter))
 387                     {
 388                         State.mCharacters[i] = new Human(this, "", State.Map.GetStartingPositionForPlayer(i + 1));
 389                         State.mCharacters[i].LoadContent(mContentManager);
 390                     }
 391                 }
 392             }
 393             if (allCharactersSelected)
 394             {
 395
 396                 State.mDisplay.Draw(spriteBatch);
 397             }
 398             else
 399             {
 400                 spriteBatch.GraphicsDevice.Clear(Color.Black);
 401                 spriteBatch.DrawString(menu, "Press Enter To Select A Character", new Vector2(30, 30), Color.RosyBrown);
 402             }
 403             return CurrentFrameNumber;
 404         }
 405
 406         #endregion
 407
 408
 409         #region Private Variables
 410
 411         SpriteFont menu;
 412
 413         ContentManager mContentManager;
 414         NextInputs mInputs;
 415
 416         Object[] mPlayerIdentifiers;
 417         int mThisPlayerID;
 418
 419         #endregion
 420     }
 421 }