battleoffice.cpp

《24小时教会你游戏编程》上的源码

//-----------------------------------------------------------------
// Battle Office Application
// C++ Source - BattleOffice.cpp
//-----------------------------------------------------------------

//-----------------------------------------------------------------
// Include Files
//-----------------------------------------------------------------
#include "BattleOffice.h"

//-----------------------------------------------------------------
// Game Engine Functions
//-----------------------------------------------------------------
BOOL GameInitialize(HINSTANCE hInstance)
{
  // Create the game engine
  _pGame = new GameEngine(hInstance, TEXT("Battle Office"),
    TEXT("Battle Office"), IDI_BATTLEOFFICE, IDI_BATTLEOFFICE_SM, 500, 400);
  if (_pGame == NULL)
    return FALSE;

  // Set the frame rate
  _pGame->SetFrameRate(30);

  // Store the instance handle
  _hInstance = hInstance;

  return TRUE;
}

void GameStart(HWND hWindow)
{
  // Seed the random number generator
  srand(GetTickCount());

  // Create the offscreen device context and bitmap
  _hOffscreenDC = CreateCompatibleDC(GetDC(hWindow));
  _hOffscreenBitmap = CreateCompatibleBitmap(GetDC(hWindow),
    _pGame->GetWidth(), _pGame->GetHeight());
  SelectObject(_hOffscreenDC, _hOffscreenBitmap);

  // Create and load the bitmaps
  HDC hDC = GetDC(hWindow);
  _pOfficeBitmap = new Bitmap(hDC, IDB_OFFICE, _hInstance);
  _pTargetBitmap = new Bitmap(hDC, IDB_TARGET, _hInstance);
  _pPowBitmap = new Bitmap(hDC, IDB_POW, _hInstance);
  _pGuyBitmaps[0] = new Bitmap(hDC, IDB_GUY1, _hInstance);
  _pGuyBitmaps[1] = new Bitmap(hDC, IDB_GUY2, _hInstance);
  _pGuyBitmaps[2] = new Bitmap(hDC, IDB_GUY3, _hInstance);
  _pGuyBitmaps[3] = new Bitmap(hDC, IDB_GUY4, _hInstance);
  _pGuyBitmaps[4] = new Bitmap(hDC, IDB_GUY5, _hInstance);
  _pSmallGuyBitmap = new Bitmap(hDC, IDB_SMALLGUY, _hInstance);
  _pGameOverBitmap = new Bitmap(hDC, IDB_GAMEOVER, _hInstance);

  // Create the target, pow, and guy sprites
  RECT    rcBounds = { 0, 0, 500, 400 };
  _pTargetSprite = new Sprite(_pTargetBitmap, rcBounds, BA_STOP);
  _pTargetSprite->SetZOrder(4);
  _pGame->AddSprite(_pTargetSprite);
  _pPowSprite = new Sprite(_pPowBitmap, rcBounds, BA_STOP);
  _pPowSprite->SetZOrder(3);
  _pPowSprite->SetHidden(TRUE);
  _pGame->AddSprite(_pPowSprite);
  _pGuySprites[0] = new Sprite(_pGuyBitmaps[0], rcBounds);
  _pGuySprites[0]->SetPosition(92, 175);
  _pGuySprites[0]->SetZOrder(2);
  _pGuySprites[0]->SetHidden(TRUE);
  _pGame->AddSprite(_pGuySprites[0]);
  _pGuySprites[1] = new Sprite(_pGuyBitmaps[1], rcBounds);
  _pGuySprites[1]->SetPosition(301, 184);
  _pGuySprites[1]->SetZOrder(2);
  _pGuySprites[1]->SetHidden(TRUE);
  _pGame->AddSprite(_pGuySprites[1]);
  _pGuySprites[2] = new Sprite(_pGuyBitmaps[2], rcBounds);
  _pGuySprites[2]->SetPosition(394, 61);
  _pGuySprites[2]->SetZOrder(2);
  _pGuySprites[2]->SetHidden(TRUE);
  _pGame->AddSprite(_pGuySprites[2]);
  rcBounds.left = 340;
  _pGuySprites[3] = new Sprite(_pGuyBitmaps[3], rcBounds, BA_WRAP);
  _pGuySprites[3]->SetPosition(500, 10);
  _pGuySprites[3]->SetVelocity(-3, 0);
  _pGuySprites[3]->SetZOrder(1);
  _pGuySprites[3]->SetHidden(TRUE);
  _pGame->AddSprite(_pGuySprites[3]);
  rcBounds.left = 385;
  _pGuySprites[4] = new Sprite(_pGuyBitmaps[4], rcBounds, BA_WRAP);
  _pGuySprites[4]->SetPosition(260, 60);
  _pGuySprites[4]->SetVelocity(5, 0);
  _pGuySprites[4]->SetZOrder(1);
  _pGuySprites[4]->SetHidden(TRUE);
  _pGame->AddSprite(_pGuySprites[4]);

  // Initialize the remaining global variables
  _iGuyMasterDelay = 50;
  _iHits = 0;
  _iMisses = 0;
  _bGameOver = FALSE;

  // Play the background music
  _pGame->PlayMIDISong(TEXT("Music.mid"));
}

void GameEnd()
{
  // Close the MIDI player for the background music
  _pGame->CloseMIDIPlayer();

  // Cleanup the offscreen device context and bitmap
  DeleteObject(_hOffscreenBitmap);
  DeleteDC(_hOffscreenDC);  

  // Cleanup the bitmaps
  delete _pOfficeBitmap;
  delete _pTargetBitmap;
  delete _pPowBitmap;
  for (int i = 0; i < 5; i++)
    delete _pGuyBitmaps[i];
  delete _pSmallGuyBitmap;
  delete _pGameOverBitmap;

  // Cleanup the sprites
  _pGame->CleanupSprites();

  // Cleanup the game engine
  delete _pGame;
}

void GameActivate(HWND hWindow)
{
  // Resume the background music
  _pGame->PlayMIDISong(TEXT(""), FALSE);
}

void GameDeactivate(HWND hWindow)
{
  // Pause the background music
  _pGame->PauseMIDISong();
}

void GamePaint(HDC hDC)
{
  // Draw the background office
  _pOfficeBitmap->Draw(hDC, 0, 0);

  // Draw the sprites
  _pGame->DrawSprites(hDC);

  // Draw the number of guys who were hit
  TCHAR szText[64];
  RECT  rect = { 237, 360, 301, 390 };
  wsprintf(szText, "%d", _iHits);
  DrawText(hDC, szText, -1, &rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER);

  // Draw the number of guys who were missed (got away)
  for (int i = 0; i < _iMisses; i++)
    _pSmallGuyBitmap->Draw(hDC, 389 + (_pSmallGuyBitmap->GetWidth() * i), 359, TRUE);

  // Draw the game over message, if necessary
  if (_bGameOver)
    _pGameOverBitmap->Draw(hDC, 120, 110, TRUE);
}

void GameCycle()
{
  if (!_bGameOver)
  {
    // Randomly show and hide the guys
    for (int i = 0; i < 5; i++)
      if (_pGuySprites[i]->IsHidden())
      {
        if (rand() % 60 == 0)
        {
          // Show the guy
          _pGuySprites[i]->SetHidden(FALSE);

          // Start the countdown delay
          if (i == 3)
          {
            // Start the guy running left
            _iGuyDelay[i] = 80;
            _pGuySprites[i]->SetPosition(500, 10);
          }
          else if (i == 4)
          {
            // Start the guy running right
            _iGuyDelay[i] = 45;
            _pGuySprites[i]->SetPosition(260, 60);
          }
          else
            // Start the stationary guys
            _iGuyDelay[i] = 20 + (rand() % _iGuyMasterDelay);
        }
      }
      else
      {
        if (--_iGuyDelay[i] == 0)
        {
          // Play a sound for the guy getting away
          PlaySound((LPCSTR)IDW_TAUNT, _hInstance, SND_ASYNC | SND_RESOURCE);

          // Hide the guy
          _pGuySprites[i]->SetHidden(TRUE);

          // Increment the misses
          if (++_iMisses == 5)
          {
            // Play a sound for the game ending
            PlaySound((LPCSTR)IDW_BOO, _hInstance, SND_ASYNC | SND_RESOURCE);

            // End the game
            for (int i = 0; i < 5; i++)
              _pGuySprites[i]->SetHidden(TRUE);
            _bGameOver = TRUE;

            // Pause the background music
            _pGame->PauseMIDISong();
          }
        }
      }

    // Update the sprites
    _pGame->UpdateSprites();

    // Obtain a device context for repainting the game
    HWND  hWindow = _pGame->GetWindow();
    HDC   hDC = GetDC(hWindow);

    // Paint the game to the offscreen device context
    GamePaint(_hOffscreenDC);

    // Blit the offscreen bitmap to the game screen
    BitBlt(hDC, 0, 0, _pGame->GetWidth(), _pGame->GetHeight(),
      _hOffscreenDC, 0, 0, SRCCOPY);

    // Cleanup
    ReleaseDC(hWindow, hDC);
  }
}

void HandleKeys()
{
}

void MouseButtonDown(int x, int y, BOOL bLeft)
{
  // Only check the left mouse button
  if (!_bGameOver && bLeft)
  {
    // Temporarily hide the target and pow sprites
    _pTargetSprite->SetHidden(TRUE);
    _pPowSprite->SetHidden(TRUE);

    // See if a guy sprite was clicked
    Sprite* pSprite;
    if ((pSprite = _pGame->IsPointInSprite(x, y)) != NULL)
    {
      // Play a sound for hitting the guy
      PlaySound((LPCSTR)IDW_WHACK, _hInstance, SND_ASYNC | SND_RESOURCE);

      // Position and show the pow sprite
      _pPowSprite->SetPosition(x - (_pPowSprite->GetWidth() / 2),
        y - (_pPowSprite->GetHeight() / 2));
      _pPowSprite->SetHidden(FALSE);

      // Hide the guy that was clicked
      pSprite->SetHidden(TRUE);

      // Increment the hits and make the game harder, if necessary
      if ((++_iHits % 5) == 0)
        if (--_iGuyMasterDelay == 0)
          _iGuyMasterDelay = 1;
    }

    // Show the target sprite again
    _pTargetSprite->SetHidden(FALSE);
  }
  else if (_bGameOver && !bLeft)
  {
    // Start a new game
    _bGameOver = FALSE;
    _iHits = 0;
    _iMisses = 0;

    // Restart the background music
    _pGame->PlayMIDISong();
  }
}

void MouseButtonUp(int x, int y, BOOL bLeft)
{
}

void MouseMove(int x, int y)
{
  // Track the mouse with the target sprite
  _pTargetSprite->SetPosition(x - (_pTargetSprite->GetWidth() / 2),
    y - (_pTargetSprite->GetHeight() / 2));
}

void HandleJoystick(JOYSTATE jsJoystickState)
{
}

BOOL SpriteCollision(Sprite* pSpriteHitter, Sprite* pSpriteHittee)
{
  return FALSE;
}