wanderer.cpp

游戏编程源码

//-----------------------------------------------------------------
// Wanderer Application
// C++ Source - Wanderer.cpp
//-----------------------------------------------------------------

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

//-----------------------------------------------------------------
// Game Engine Functions
//-----------------------------------------------------------------
BOOL GameInitialize(HINSTANCE hInstance)
{
  // Create the game engine
  g_pGame = new GameEngine(hInstance, TEXT("Wanderer"),
    TEXT("Wanderer"), IDI_WANDERER, IDI_WANDERER_SM, 256, 256);
  if (g_pGame == NULL)
    return FALSE;

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

  // Initialize the joystick
  g_pGame->InitJoystick();

  // Store the instance handle
  g_hInstance = hInstance;

  return TRUE;
}

void GameStart(HWND hWindow)
{
  // Create the offscreen device context and bitmap
  g_hOffscreenDC = CreateCompatibleDC(GetDC(hWindow));
  g_hOffscreenBitmap = CreateCompatibleBitmap(GetDC(hWindow),
    g_pGame->GetWidth(), g_pGame->GetHeight());
  SelectObject(g_hOffscreenDC, g_hOffscreenBitmap);

  // Create the scrolling background and landscape layer
  HDC hDC = GetDC(hWindow);
  g_pBackground = new ScrollingBackground(256, 256);
  g_pBGLandscapeLayer = new BackgroundLayer(hDC, IDB_BG_LANDSCAPE, g_hInstance);
  RECT rcViewport = { 352, 352, 608, 608 };
  g_pBGLandscapeLayer->SetViewport(rcViewport);
  g_pBackground->AddLayer(g_pBGLandscapeLayer);

  // Create the scrolling foreground and clouds layer
  g_pForeground = new ScrollingBackground(256, 256);
  g_pFGCloudsLayer = new BackgroundLayer(hDC, IDB_BG_CLOUDS, g_hInstance);
  rcViewport.left = rcViewport.top = 64;
  rcViewport.right = rcViewport.bottom = 320;
  g_pFGCloudsLayer->SetViewport(rcViewport);
  g_pForeground->AddLayer(g_pFGCloudsLayer);

  // Create and load the person bitmap
  g_pPersonBitmap = new Bitmap(hDC, IDB_PERSON, g_hInstance);

  // Create the person sprite
  RECT rcBounds = { 115, 112, 26, 32 };
  g_pPersonSprite = new PersonSprite(g_pPersonBitmap, rcBounds, BA_STOP);
  g_pPersonSprite->SetNumFrames(2);
  g_pPersonSprite->SetPosition(115, 112);
  g_pGame->AddSprite(g_pPersonSprite);

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

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

  // Cleanup the offscreen device context and bitmap
  DeleteObject(g_hOffscreenBitmap);
  DeleteDC(g_hOffscreenDC);  

  // Cleanup the bitmaps
  delete g_pPersonBitmap;

  // Cleanup the scrolling background and landscape layer
  delete g_pBackground;
  delete g_pBGLandscapeLayer;

  // Cleanup the scrolling foreground and clouds layer
  delete g_pForeground;
  delete g_pFGCloudsLayer;

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

  // Cleanup the game engine
  delete g_pGame;
}

void GameActivate(HWND hWindow)
{
  // Capture the joystick
  g_pGame->CaptureJoystick();

  // Resume the background music
  g_pGame->PlayMIDISong(TEXT(""), FALSE);
}

void GameDeactivate(HWND hWindow)
{
  // Release the joystick
  g_pGame->ReleaseJoystick();

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

void GamePaint(HDC hDC)
{
  // Draw the scrolling background
  g_pBackground->Draw(hDC);

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

  // Draw the scrolling foreground
  g_pForeground->Draw(hDC, TRUE); // draw with transparency
}

void GameCycle()
{
  // Update the background
//  g_pBackground->Update();

  // Update the foreground
//  g_pForeground->Update();

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

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

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

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

  // Cleanup
  ReleaseDC(hWindow, hDC);
}

void HandleKeys()
{
  // Move the landscape/cloud layers based upon arrow key presses
  if (g_iInputDelay++ > 1)
  {
    if (GetAsyncKeyState(VK_LEFT) < 0)
    {
      // Make the person walk
      g_pPersonSprite->Walk();

      // Move the landscape layer to the right
      g_pBGLandscapeLayer->SetSpeed(16);
      g_pBGLandscapeLayer->SetDirection(SD_RIGHT);
      g_pBGLandscapeLayer->Update();
      g_pBGLandscapeLayer->SetSpeed(0);

      // Move the cloud layer to the right
      g_pFGCloudsLayer->SetSpeed(4);
      g_pFGCloudsLayer->SetDirection(SD_RIGHT);
      g_pFGCloudsLayer->Update();
      g_pFGCloudsLayer->SetSpeed(0);
    }
    else if (GetAsyncKeyState(VK_RIGHT) < 0)
    {
      // Make the person walk
      g_pPersonSprite->Walk();

      // Move the landscape layer to the left
      g_pBGLandscapeLayer->SetSpeed(16);
      g_pBGLandscapeLayer->SetDirection(SD_LEFT);
      g_pBGLandscapeLayer->Update();
      g_pBGLandscapeLayer->SetSpeed(0);

      // Move the cloud layer to the left
      g_pFGCloudsLayer->SetSpeed(4);
      g_pFGCloudsLayer->SetDirection(SD_LEFT);
      g_pFGCloudsLayer->Update();
      g_pFGCloudsLayer->SetSpeed(0);
    }
    else if (GetAsyncKeyState(VK_UP) < 0)
    {
      // Make the person walk
      g_pPersonSprite->Walk();

      // Move the landscape layer down
      g_pBGLandscapeLayer->SetSpeed(16);
      g_pBGLandscapeLayer->SetDirection(SD_DOWN);
      g_pBGLandscapeLayer->Update();
      g_pBGLandscapeLayer->SetSpeed(0);

      // Move the cloud layer down
      g_pFGCloudsLayer->SetSpeed(4);
      g_pFGCloudsLayer->SetDirection(SD_DOWN);
      g_pFGCloudsLayer->Update();
      g_pFGCloudsLayer->SetSpeed(0);
    }
    else if (GetAsyncKeyState(VK_DOWN) < 0)
    {
      // Make the person walk
      g_pPersonSprite->Walk();

      // Move the landscape layer up
      g_pBGLandscapeLayer->SetSpeed(16);
      g_pBGLandscapeLayer->SetDirection(SD_UP);
      g_pBGLandscapeLayer->Update();
      g_pBGLandscapeLayer->SetSpeed(0);

      // Move the cloud layer up
      g_pFGCloudsLayer->SetSpeed(4);
      g_pFGCloudsLayer->SetDirection(SD_UP);
      g_pFGCloudsLayer->Update();
      g_pFGCloudsLayer->SetSpeed(0);
    }

    // Reset the input delay
    g_iInputDelay = 0;
  }
}

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

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

void MouseMove(int x, int y)
{
}

void HandleJoystick(JOYSTATE jsJoystickState)
{
  if (++g_iInputDelay > 2)
  {
    // Check horizontal movement
    if (jsJoystickState & JOY_LEFT)
    {
      // Make the person walk
      g_pPersonSprite->Walk();

      // Move the landscape layer to the right
      g_pBGLandscapeLayer->SetSpeed(16);
      g_pBGLandscapeLayer->SetDirection(SD_RIGHT);
      g_pBGLandscapeLayer->Update();
      g_pBGLandscapeLayer->SetSpeed(0);

      // Move the cloud layer to the right
      g_pFGCloudsLayer->SetSpeed(4);
      g_pFGCloudsLayer->SetDirection(SD_RIGHT);
      g_pFGCloudsLayer->Update();
      g_pFGCloudsLayer->SetSpeed(0);
    }
    else if (jsJoystickState & JOY_RIGHT)
    {
      // Make the person walk
      g_pPersonSprite->Walk();

      // Move the landscape layer to the left
      g_pBGLandscapeLayer->SetSpeed(16);
      g_pBGLandscapeLayer->SetDirection(SD_LEFT);
      g_pBGLandscapeLayer->Update();
      g_pBGLandscapeLayer->SetSpeed(0);

      // Move the cloud layer to the left
      g_pFGCloudsLayer->SetSpeed(4);
      g_pFGCloudsLayer->SetDirection(SD_LEFT);
      g_pFGCloudsLayer->Update();
      g_pFGCloudsLayer->SetSpeed(0);
    }
    else if (jsJoystickState & JOY_UP)
    {
      // Make the person walk
      g_pPersonSprite->Walk();

      // Move the landscape layer down
      g_pBGLandscapeLayer->SetSpeed(16);
      g_pBGLandscapeLayer->SetDirection(SD_DOWN);
      g_pBGLandscapeLayer->Update();
      g_pBGLandscapeLayer->SetSpeed(0);

      // Move the cloud layer down
      g_pFGCloudsLayer->SetSpeed(4);
      g_pFGCloudsLayer->SetDirection(SD_DOWN);
      g_pFGCloudsLayer->Update();
      g_pFGCloudsLayer->SetSpeed(0);
    }
    else if (jsJoystickState & JOY_DOWN)
    {
      // Make the person walk
      g_pPersonSprite->Walk();

      // Move the landscape layer up
      g_pBGLandscapeLayer->SetSpeed(16);
      g_pBGLandscapeLayer->SetDirection(SD_UP);
      g_pBGLandscapeLayer->Update();
      g_pBGLandscapeLayer->SetSpeed(0);

      // Move the cloud layer up
      g_pFGCloudsLayer->SetSpeed(4);
      g_pFGCloudsLayer->SetDirection(SD_UP);
      g_pFGCloudsLayer->Update();
      g_pFGCloudsLayer->SetSpeed(0);
    }

    // Reset the input delay
    g_iInputDelay = 0;
  }
}

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

void SpriteDying(Sprite* pSpriteDying)
{
}