Esempio n. 1
0
/****************************************************************************
 * ClientWndProc                                                            *
 *  - Typical PM client window procedure.  (see below)                      *
 *  - Standard client window I/O                                            *
 ****************************************************************************/
MRESULT EXPENTRY ClientWndProc(HWND hwnd, ULONG msg, MPARAM mp1, MPARAM mp2)
{
	   RECTL  rcl;
	   SWP	  swp;
	   HPS	  hpsPaint;

    static HPS	  hps;                      /* Permanent HPS                */
    static INT    cx, cy;		    /* Client window dimensions     */
    static BOOL   bSlowUpdateNow = FALSE;   /* Update toggle for asteroids  *
                                             *   and enemy which are slow.  */
    static POINTL ptlCenter;		    /* Center of client window      */

    switch (msg) {
      /* Recieved from WinCreateStdWindow */
      case WM_CREATE:
	/* Get permanent PS for entire window */
	hps = WinGetPS(hwnd);

	/* Load private Asteroid fonts from ASTEROID.DLL */
	if (GpiLoadFonts(hab, "ASTEROID") != GPI_OK) {
            WinReleasePS(hps);
	    WinAlarm(HWND_DESKTOP, WA_WARNING);
	    WinMessageBox(HWND_DESKTOP,NULLHANDLE,
		"Please put ASTEROID.DLL in a directory in your LIBPATH.",
		"Error reading ASTEROID.DLL",
		0,MB_ICONHAND|MB_OK|MB_APPLMODAL);
	    WinPostMsg(hwnd,WM_QUIT,(MPARAM) 0L,(MPARAM) 0L);
	    return (MRESULT) TRUE;
	    }

        /* Register/create logical fonts for use */
	InitFonts(hps);

	/* Display About dialoge box */
	WinDlgBox(HWND_DESKTOP, hwnd, (PFNWP)AboutDlgProc, NULLHANDLE,
		  IDD_ABOUT, NULL);

	return 0;

      /* Recieved during attract mode when user starts game */
      case WM_STARTGAME:
        /* Determine the number of players */
	cPlayers = (INT)LONGFROMMP(mp1);

        /* Initialize each player */
	for (Player=0;Player<cPlayers;Player++) {
	    Level[Player] = 1;
	    Ships[Player] = prfProfile.iSHIPS;
	    DeletePhotons();
	    InitAsteroids();
	    InitEnemy();
	    }

        /* Start with player 1 */
	Player = 0;
	iGameMode = GAME_MODE_NEXT;
	iGameModeCnt = GAME_PAUSE_TIME-1;

	/* Hide the pointer if mouse controls are enabled */
	ShowMouse(FALSE);
        
        /* Paint everything */
	WinSendMsg(hwnd, WM_PAINT, MPVOID, MPVOID);

	return 0;

      /* Recieved at startup and at the completion of a game */
      case WM_INITGAME:
        /* Make mouse visible if we hid it before */
        ShowMouse(TRUE);
        
	/* Fix menu to reflect attract mode */
	EnableMenuItem(hwndMenu, IDM_START, TRUE);
	EnableMenuItem(hwndMenu, IDM_STOP, FALSE);

	/* Initialize player and enemy data structures */
	cPlayers = 0;
	Level[0] = 1;
	for (Player=0;Player<2;Player++) {
	    Score[Player] = 0L;
	    Ships[Player] = 0;
	    DeletePhotons();
	    }
	Player = 0;

	/* Initialize asteroids (and enemy) for attract mode */
	InitAsteroids();
	InitEnemy();

        /* Depending on whether ASTEROID was just started or a game just  *
         *   completed display the "High Score" or "Press 1 or 2" screen. */
	if (SHORT1FROMMP(mp1) == 0) {
	    iGameMode = GAME_MODE_INIT1;
	    iGameModeCnt = GAME_INIT_TIME;
	    }
	else {
	    iGameMode = GAME_MODE_INIT2;
	    iGameModeCnt = GAME_INIT_TIME;
	    }

        /* Paint everything */
	WinSendMsg(hwnd, WM_PAINT, MPVOID, MPVOID);
	return 0;

      /* Usually recieved from the system, sometime forced by the program to *
       *   ensure the screen is not corrupt.                                 */
      case WM_PAINT:
	/* Clear entire window to insure no "droppings" */
	WinQueryWindowRect(hwnd,&rcl);
        WinFillRect(hps, &rcl, CLR_BLACK);
	WinInvalidateRect(hwnd, &rcl, FALSE);

	/* Get the update region and paint it black */
	hpsPaint = WinBeginPaint(hwnd, (HPS)NULL, &rcl);
	WinFillRect(hpsPaint, &rcl, CLR_BLACK);
	WinEndPaint(hpsPaint);

        /* Only in normal play mode should we draw the ship */
	if ((iGameMode == GAME_MODE_PLAY) &&
	    (iShipMode[Player] != EXPLOSION) &&
	    (iShipMode[Player] != HYPERSPACE))
	    DrawShip(hps, cx, cy, DRAW_INIT);
	else if ((iGameMode == GAME_MODE_PLAY) &&
		 (iShipMode[Player] == EXPLOSION))
	    ExplodeShip(hps, cx, cy);

        /* Draw the enemy if it is on the screen */
	if (iEnemyMode[Player] != NONE)
	    if (iEnemyMode[Player] != EXPLOSION)
		DrawEnemy(hps, cx, cy,DRAW_INIT);
	    else
		ExplodeEnemy(hps, cx, cy);

        /* Draw photons and asteroids in all modes but the "Enter your *
         *   initials" mode, otherwise draw that screen.               */
	if (iGameMode != GAME_MODE_HIGH) {
	    DrawPhotons(hps, cx, cy, DRAW_INIT);
	    DrawAsteroids(hps, cx, cy, DRAW_INIT);
	    }
	else
	    DrawHighScore(hps, cx, cy, DRAW_INIT);

        /* Always draw the score */
	DrawScore(hps, cx, cy, DRAW_INIT);

	return 0;

      /* Left mouse button down.  This simulates the move/track function *
       *   in the system menu.                                           */
      case WM_BUTTON1DOWN:
        if (prfProfile.bMOUSECONTROL &&
            iGameMode != GAME_MODE_INIT1 &&
            iGameMode != GAME_MODE_INIT2 &&
            !TogglePause(CHECK)) {
	    UPDATE_FIRE(iShipMode[Player], TRUE);
            return (MRESULT)TRUE;
        }
	return WinSendMsg(hwndFrame, WM_TRACKFRAME,
			 (MPARAM) (SHORT1FROMMP(mp2) | TF_MOVE), MPVOID);

      case WM_BUTTON1UP:
        if (prfProfile.bMOUSECONTROL) {
	    UPDATE_FIRE(iShipMode[Player], FALSE);
            return (MRESULT)TRUE;
        }
        return 0;
        
      /* Left mouse button double clicked.  Toggle frame control display. */
      case WM_BUTTON1DBLCLK:
        if (!prfProfile.bMOUSECONTROL ||
            iGameMode == GAME_MODE_INIT1 ||
            iGameMode == GAME_MODE_INIT2 ||
            TogglePause(CHECK)) {
            if (prfProfile.bCONTROLS = !prfProfile.bCONTROLS)
	    	ShowFrameControls();
            else
	    	HideFrameControls();
        }
	return 0;

      case WM_BUTTON2DOWN:
        if (prfProfile.bMOUSECONTROL) {
	    UPDATE_SHIELD(iShipMode[Player], iShipShieldCnt[Player]);
            return (MRESULT)TRUE;
        }
        return 0;
        
      case WM_BUTTON2CLICK:
        if (prfProfile.bMOUSECONTROL) {
            UPDATE_HYPERSPACE(iShipMode[Player], iShipModeCnt[Player]);
            return (MRESULT)TRUE;
        }
        return 0;
        
      /* Right mouse button double clicked.  Display the about dialog box. */
      case WM_BUTTON2DBLCLK:
        if (!prfProfile.bMOUSECONTROL ||
            iGameMode == GAME_MODE_INIT1 ||
            iGameMode == GAME_MODE_INIT2 ||
            TogglePause(CHECK)) {
            WinDlgBox(HWND_DESKTOP, hwndClient, (PFNWP)AboutDlgProc,
            	      NULLHANDLE, IDD_ABOUT, NULL);
        }
	return 0;

      /* User typed a key.  Most of this is self explanatory. */
      case WM_CHAR:
	ProcessChar((CHAR) (CHARMSG(&msg)->vkey-1),
		    CHARMSG(&msg)->fs & KC_VIRTUALKEY,
		    (CHAR) (CHARMSG(&msg)->chr),
		    (BOOL) !(CHARMSG(&msg)->fs & KC_KEYUP));
	return 0;

      /* User entered a command via the menu bar. */
      case WM_COMMAND:
	DoCommand(hwnd, msg, mp1, mp2);
	return 0;

      /* Suspend/un-suspend game depending on focus */
      case WM_SETFOCUS:
	if ((BOOL) SHORT1FROMMP(mp2))
	    TogglePause(SUSPEND_OFF);
	else if (!prfProfile.bBACKGRND)
	    TogglePause(SUSPEND_ON);
	return 0;

      /* Keep track of the client window size.  Profile information is not *
       *   updated here because there are better places (i.e. at exit)     */
      case WM_SIZE:
	cx = (INT)SHORT1FROMMP(mp2);
	cy = (INT)SHORT2FROMMP(mp2);

      /* Keep track of client window position.  Also updates profile info. */
      case WM_MOVE:
	WinQueryWindowPos(hwndFrame,&swp);
	if (!(swp.fl & SWP_MAXIMIZE) && !(swp.fl & SWP_MINIMIZE)) {
	    prfProfile.x  = swp.x;prfProfile.y   = swp.y;
	    prfProfile.cx = swp.cx;prfProfile.cy = swp.cy;
	    }

	if (swp.fl & SWP_MINIMIZE)
	    if (!prfProfile.bBACKGRND) {
		/* Set icon */
		WinSendMsg(hwndFrame, WM_SETICON,
		    (MPARAM) WinLoadPointer(HWND_DESKTOP, NULLHANDLE,
					    ID_RESOURCE), MPVOID);

		TogglePause(SUSPEND_ON);
		}
	    else
		WinSendMsg(hwndFrame, WM_SETICON, MPVOID, MPVOID);
	else
	    TogglePause(SUSPEND_OFF);

	ptlCenter.x = swp.cx / 2;
        ptlCenter.y = swp.cy / 2;
        WinMapWindowPoints(hwndClient, HWND_DESKTOP, &ptlCenter, 1L);

	return 0;

      /* Recieved approximately 31 times a second.  This is the longest and *
       *   ugliest of the messages, partly because there are so many cases  *
       *   to keep track of, partly because it must be highly optimized.    */
      case WM_TIMER:
        if (prfProfile.bMOUSECONTROL &&
            iGameMode != GAME_MODE_INIT1 &&
            iGameMode != GAME_MODE_INIT2) {                   POINTL ptl;
            static BOOL   bUp, bLeft, bRight;

            WinQueryPointerPos(HWND_DESKTOP, &ptl);
            if (bUp || (ptl.y - ptlCenter.y > 0))
	       	UPDATE_THRUST(iShipMode[Player],
            		      bUp = (ptl.y - ptlCenter.y > 0));
            if (bLeft || (ptlCenter.x - ptl.x > 0))
                UPDATE_LEFT(iShipMode[Player],
                	    bLeft = (ptlCenter.x - ptl.x > 0));
            if (bRight || (ptlCenter.x - ptl.x < 0))
                UPDATE_RIGHT(iShipMode[Player],
                 	     bRight = (ptlCenter.x - ptl.x < 0));
            WinSetPointerPos(HWND_DESKTOP, ptlCenter.x, ptlCenter.y);
        }
        
        /* Determine the current game mode */
	switch (iGameMode) {

          /* Either initialization/attract mode screen. */
	  case GAME_MODE_INIT1: case GAME_MODE_INIT2:
            /* Switch screens when count expires */
	    if (--iGameModeCnt == 0) {
		if (iGameMode == GAME_MODE_INIT1)
		    iGameMode = GAME_MODE_INIT2;
		else
		    iGameMode = GAME_MODE_INIT1;
		iGameModeCnt = GAME_INIT_TIME;

                /* Score must be redrawn because the attract mode screens *
                 *   draw the score differently.                          */
		DrawScore(hps, cx, cy, DRAW_REINIT);
		}

            /* Update photons, asteroids, enemy, and score */
	    UpdatePhotons(hps, cx, cy);
	    if (uiSpeed == SPEED_OS2 || (bSlowUpdateNow = !bSlowUpdateNow)) {
		UpdateAsteroids(hps, cx, cy);
		UpdateEnemy(hps, cx, cy);
		DrawScore(hps, cx, cy, DRAW_REFRESH);
		}
	    break;

          /* Completion of one player's turn or new game */
	  case GAME_MODE_NEXT:
            /* Initially, erase and redraw everything for new player */
	    if (iGameModeCnt-- == GAME_PAUSE_TIME) {
		if ((cPlayers == MAXPLAYERS) &&
                    (Ships[(Player+1) % MAXPLAYERS])) {
		    DrawAsteroids(hps, cx, cy, DRAW_ERASE);
		    DrawPhotons(hps, cx, cy, DRAW_ERASE);
		    Player = (Player+1) % MAXPLAYERS;
		    }
		DrawScore(hps, cx, cy, DRAW_REINIT);
		DrawAsteroids(hps, cx, cy, DRAW_INIT);
		}
            /* During countdown update score and asteroids */
	    else if (iGameModeCnt > 0) {
		if (uiSpeed == SPEED_OS2 || (bSlowUpdateNow = !bSlowUpdateNow)) {
		    DrawScore(hps, cx, cy, DRAW_REFRESH);
		    UpdateAsteroids(hps, cx, cy);
		    }
		}
            /* At end of countdown start the player */
	    else {
		InitShip();
		InitEnemy();
		iGameMode = GAME_MODE_PLAY;
		DrawScore(hps, cx, cy, DRAW_REINIT);
		}
	    break;

          /* Normal play mode */
	  case GAME_MODE_PLAY:
            /* Update ship, photons, asteroids, enemy, and score */
	    UpdateShip(hps, cx, cy);
	    UpdatePhotons(hps, cx, cy);
	    if (uiSpeed == SPEED_OS2 || (bSlowUpdateNow = !bSlowUpdateNow)) {
		UpdateAsteroids(hps, cx, cy);
		UpdateEnemy(hps, cx, cy);
                /* Erase old and draw new scores if there is a change*/
		if (bChangeScore) {
		    bChangeScore = FALSE;
		    DrawScore(hps, cx, cy, DRAW_REINIT);
		    }
                /* Else just refresh the score */
		else
		    DrawScore(hps, cx, cy, DRAW_REFRESH);
		}
	    break;

          /* Game over mode.  This is the longest and ugliest case because  *
           *   conditions are highly dependent on the number of players,    *
           *   multiplayer game status, and the number and order of high    *
           *   scores.                                                      */
	  case GAME_MODE_OVER:
            /* Initially, just update the score and number of ships */
	    if (iGameModeCnt-- == GAME_PAUSE_TIME)
		DrawScore(hps, cx, cy, DRAW_REINIT);

            /* During countdown refresh the score and update the asteroids */
	    else if (iGameModeCnt > 0) {
		if (uiSpeed == SPEED_OS2 || (bSlowUpdateNow = !bSlowUpdateNow)) {
		    DrawScore(hps, cx, cy, DRAW_REFRESH);
		    UpdateAsteroids(hps, cx, cy);
		    }
		}

            /* At the end of the countdown, if there are any other players, *
             *   continue with them.                                        */
	    else {
                /* Countinue on with any remaining players. */
		if ((cPlayers == MAXPLAYERS) &&
                    (Ships[(Player+1) % MAXPLAYERS])) {
                    /* Erase all of the old asteroids. */
		    DrawAsteroids(hps, cx, cy, DRAW_ERASE);

                    /* Setup everything for the next player */
		    Player = (Player+1) % MAXPLAYERS;
		    InitShip();
		    InitEnemy();
		    iGameMode = GAME_MODE_PLAY;
		    DrawAsteroids(hps, cx, cy, DRAW_INIT);
		    DrawScore(hps, cx, cy, DRAW_REINIT);
		    }

                /* Check for new high scores and update table as necessary. */
		else {
                    /* Erase all of the old asteroids. */
		    DrawAsteroids(hps, cx, cy, DRAW_ERASE);


                /* The following if/else block is admittedly a kludge, it is *
                 *   simple and it does work, however.  Ideally it should    *
                 *   sort the high scores and update the high score table in *
                 *   descending order.                                       */

                    /* If player 1 scored higher than player 2 then check *
                     *   player 1 first for a high score.                 */
       		    if (Score[0] > Score[1])
			for (Player=0;Player<cPlayers;Player++)
                            /* If the player's score is > than the lowest, *
                             *   update the high score table.              */
			    if (Score[Player] > prfProfile.lSCORES[9]) {
				UpdateHighScores();
				iGameMode = GAME_MODE_HIGH;
				}
                            /* Otherwise, make sure he is not asked for his *
                             *   initials.                                  */
			    else
				Score[Player] = 0;

                    /* Otherwise, check player 2 first */
		    else
			for (Player=cPlayers;Player>=0;Player--)
                            /* If the player's score is > than the lowest, *
                             *   update the high score table.              */
			    if (Score[Player] > prfProfile.lSCORES[9]) {
				UpdateHighScores();
				iGameMode = GAME_MODE_HIGH;
				}
                            /* Otherwise, make sure he is not asked for his *
                             *   initials.                                  */
			    else
				Score[Player] = 0L;

                    /* If there was no high score, go into attract mode */
		    if (iGameMode != GAME_MODE_HIGH)
			WinSendMsg(hwnd,WM_INITGAME,MPFROMSHORT(1),(MPARAM) 0L);
                    /* Else, check for player 1's initials first then 2's   *
                     * This is not faithful, in the arcade game the player  *
                     *   with the higher score always goes first.           */
		    else {
			if (Score[0] > 0L)
			    Player = 0;
			else
			    Player = 1;
			DrawScore(hps, cx, cy, DRAW_REINIT);
			DrawHighScore(hps, cx, cy, DRAW_INIT);
			}
		    }
		}
	    break;

          /* Mode which prompts players to enter their initials */
	  case GAME_MODE_HIGH:
            /* If the player's position is > 0 then refresh the screen */
	    if (Score[Player] > 0L)
		DrawHighScore(hps, cx, cy, DRAW_REFRESH);
            /* Else, the current player is done go to the next */
	    else if ((cPlayers == MAXPLAYERS) && (Player == 0) &&
		     (Score[1] > 0L)) {
		Player++;
		DrawHighScore(hps, cx, cy, DRAW_REINIT);
		}
            /* If there are no more high scores then go into attract mode */
	    else
		WinSendMsg(hwnd, WM_INITGAME, MPFROMSHORT(1), MPVOID);
	    break;
	  }
	return 0;

      /* Used by help manager */
      case HM_QUERY_KEYS_HELP:
	 return((MRESULT)IDH_CLIENTKEYS);

      /* Recieved always from the system or in the case of an initialization*
       *   error.  Both messages will normally save the profile information.*
       * Ideally the profile section should be moved to a subroutine and the*
       *   the following should be broken into two distinct cases.	    */
      case WM_SAVEAPPLICATION:
      case WM_DESTROY:
	/* If the fonts were not found bApplicationOk will be false, in     *
	 *   that case the window profile information should not be updated.*/
	if (TRUE) {
	    /* Copy window position and size info into profile structure */
	    WinQueryWindowPos(hwndFrame, &swp);
	    if (swp.fl & SWP_MAXIMIZE)
		prfProfile.ulMINMAX = SWP_MAXIMIZE;
	    else if (swp.fl & SWP_MINIMIZE)
		prfProfile.ulMINMAX = SWP_MINIMIZE;
	    else {
		prfProfile.ulMINMAX = 0;
		prfProfile.x  = swp.x;prfProfile.y   = swp.y;
		prfProfile.cx = swp.cx;prfProfile.cy = swp.cy;
		}

	    /* Write profile information */
	    PrfWriteProfileData(HINI_USERPROFILE, szClientClass, "Data",
		&prfProfile, sizeof(PROFILEREC));
	    }

        /* If the application is terminating release the fonts and the hps. */
        if (msg == WM_DESTROY) {
	    /* Make sure mouse is visible if we hid it before */
            ShowMouse(TRUE);
            
	    /* Release font identifiers and DLL resource module */
	    GpiSetCharSet(hps, LCID_DEFAULT);
	    GpiDeleteSetId(hps, LCID_LARGE);
	    GpiDeleteSetId(hps, LCID_SMALL);
	    GpiUnloadFonts(hab, "ASTEROID");

	    /* Release the "permanent" presentation space */
	    WinReleasePS(hps);
            }
	return 0;

      }
    return WinDefWindowProc(hwnd, msg, mp1, mp2);
}
Esempio n. 2
0
void Game::Process()
{
   Input& input = Input::GetInstance();
   OpenGL& opengl = OpenGL::GetInstance();
   
   // Check keys
   if (input.QueryAction(Input::PAUSE)) {
      if (state == gsPaused) {
         // Unpause the game
         state = gsInGame;
      }
      else if (state == gsInGame) {
         // Pause the game
         state = gsPaused;
         ship.ThrustOff();
      }
      
      input.ResetAction(Input::PAUSE);
   }

   if (input.QueryResetAction(Input::SCREENSHOT))
      opengl.DeferScreenShot();

   // Do no more game processing in the paused state
   if (state == gsPaused)
      return;

   if (input.QueryAction(Input::THRUST)
       && !fuelmeter.OutOfFuel() && state == gsInGame) {
      // Thrusting
      ship.ThrustOn();
      ship.Thrust(SHIP_SPEED);
      fuelmeter.BurnFuel();
   }
   else
      ship.ThrustOff();
   
   if (input.QueryAction(Input::RIGHT) && state == gsInGame) {
      // Turn clockwise
      ship.Turn(TURN_ANGLE);
   }
   else if (input.QueryAction(Input::LEFT) && state == gsInGame) {
      // Turn anti-clockwise
      ship.Turn(-TURN_ANGLE);
   }
   
   if (input.QueryAction(Input::SKIP) && state == gsExplode) {
      // The player got bored watching the explosion
      EnterDeathWait(lives == 0 ? DEATH_TIMEOUT : 1);
   }

   if (input.QueryAction(Input::ABORT) && state == gsInGame) {
      // Quit to main menu
      ExplodeShip();
      lives = 0;
   }

   if (input.QueryAction(Input::DEBUG)) {
      // Toggle debug mode
      bDebugMode = !bDebugMode;
      input.ResetAction(Input::DEBUG);
   }

   // Move only if not in game over
   if (state == gsInGame || state == gsExplode) {
      ship.ApplyGravity(flGravity);

      // Move the ship (and exhaust and explosion)
      ship.Move();
   }

   ship.ProcessEffects(state == gsPaused, state == gsExplode);

   // Move mines
   for (MineListIt it = mines.begin(); it != mines.end(); ++it)
      (*it).Move();

   // Move or fire missiles
   for (MissileListIt it = missiles.begin(); it != missiles.end(); ++it)
      (*it).Move(ship);
   
   // Calculate view adjusts
   ship.CentreInViewport();

   // Check for collisions with surface
   int padIndex;
   if (surface.CheckCollisions(ship, pads, &padIndex)) {
      bool landed = false;
      if (state == gsInGame) {
         if (padIndex != -1) {
            // Hit a landing pad
            int dAngle = ((int)ship.GetAngle()) % 360;
            if ((dAngle >= 330 || dAngle <= 30)
                && speedmeter.SafeLandingSpeed() && nKeysRemaining == 0) {
               // Landed safely
               state = gsLevelComplete;
               CalculateScore(padIndex);
               countdown_timeout = 70;
               landed = true;
            }
         }
         if (!landed) {
            // Crash landed
            ExplodeShip();
            ship.Bounce();
         }
      }
      else if (state == gsExplode)
         EnterDeathWait();
   }
   
   // Check for collisions with asteroids
   LineSegment l1, l2;
   for (AsteroidListIt it = asteroids_.begin();
        it != asteroids_.end(); ++it) {
      const Asteroid& a = *it;
      
      if (a.ObjectInScreen(&viewport)) {
         if (a.CheckCollision(ship)) {
            // Crashed
            if (state == gsInGame) {
               // Destroy the ship
               ExplodeShip();
               ship.Bounce();
            }
            else if (state == gsExplode)
               EnterDeathWait();
         }
      }
   }

   // Check for collision with gateways
   for (ElectricGateListIt it = gateways.begin(); it != gateways.end(); ++it) {
      if ((*it).CheckCollision(ship)) {
         if (state == gsInGame) {
            // Destroy the ship
            ExplodeShip();
            ship.Bounce();
         }
         else if (state == gsExplode) {
            // Destroy the ship anyway
            EnterDeathWait();
         }
      }
   }

   // Check for collisions with mines
   for (MineListIt it = mines.begin(); it != mines.end(); ++it) {
      if ((*it).CheckCollision(ship)) {
         if (state == gsInGame) {
            // Destroy the ship
            ExplodeShip();
            ship.Bounce();
         }
         else if (state == gsExplode)
            EnterDeathWait();
      }
   }

   // Check for collisons with missiles
   for (MissileListIt it = missiles.begin(); it != missiles.end(); ++it) {
      if ((*it).CheckCollison(ship)) {
         if (state == gsInGame) {
            // Destroy the ship 
            ExplodeShip();
            ship.Bounce();
         }
         else if (state == gsExplode)
            EnterDeathWait();
      }
   }

   // See if the player collected a key
   for (KeyListIt it = keys.begin(); it != keys.end(); ++it) {
      if((*it).CheckCollision(ship)) {
         nKeysRemaining--;
         (*it).Collected();
         objgrid.UnlockSpace((*it).GetX(), (*it).GetY());

         collectSound.Play();
      }
   }

   // Entry / exit states
   if (state == gsDeathWait) {
      if (--death_timeout == 0) {
         // Fade out
         if (lives == 0  || (lives == 1 && life_alpha < LIFE_ALPHA_BASE))
            state = gsFadeToDeath;
         else if (lives > 0) {
            if (life_alpha < LIFE_ALPHA_BASE) {
               life_alpha = LIFE_ALPHA_BASE + 1.0f;
               lives--;
            }

            state = gsFadeToRestart;
         }

         fade.BeginFadeOut();
      }
   }
   else if (state == gsGameOver) {
      if (--death_timeout == 0) {
         // Fade out
         state = gsFadeToDeath;
         fade.BeginFadeOut();
      }
   }
   else if (state == gsFadeIn) {
      // Fade in
      if (fade.Process())
         state = gsInGame;
   }
   else if (state == gsFadeToRestart) {
      // Fade out
      if (fade.Process()) {
         // Restart the level
         StartLevel();
         opengl.SkipDisplay();
      }
   }
   else if (state == gsFadeToDeath) {
      if (fade.Process()) {
         // Return to main menu
         ScreenManager& sm = ScreenManager::GetInstance();
         HighScores* hs = static_cast<HighScores*>(sm.GetScreenById("HIGH SCORES"));
         hs->CheckScore(score);
      }
   }
   else if (state == gsLevelComplete) {
      // Decrease the displayed score
      if (countdown_timeout > 0)
         countdown_timeout--;
      else if (levelcomp_timeout > 0) {
         if (--levelcomp_timeout == 0) {
            level++;
            state = gsFadeToRestart;
            fade.BeginFadeOut();
         }
      }
      else {
         int dec = level * 2;
         
         // Decrease the score
         newscore -= dec;
         score += dec;
         
         if (score > nextnewlife) {
            lives++;
            nextnewlife *= 2;
         }
         
         if (newscore < 0) {
            // Move to the next level (after a 1s pause)
            score -= -newscore;
            levelcomp_timeout = 40;
         }
      }
   }
   
   // Decrease level text timeout
   if (leveltext_timeout > 0)
      leveltext_timeout--;

   // Spin the ship if we're exploding
   if (state == gsExplode)
      ship.Turn(DEATH_SPIN_RATE);
}