GameEngine 基础入门 c++

今天是我第一次写博客，也为了促进自己的学习！！！！！

我以《游戏编程入门》这本书作为教材学习游戏编程。本书的作者是Michael Morrison著。我使用的是vc6++里面的编译器，作为不太大的游戏，要想学习里面的原理，我使用的是VIM文本编辑器。至于如何配置和利用VIM来写工程代码，我将在日后的博客里会写到。

搞了很多天，vim 还是不会怎么用，还是用mic 的vc6 直观，学会偷懒了呵呵。现在附上代码：

GameEngine.h GameEngine.cpp

1. 1. # pragma once
   2. //-----------------------------------------
      //包含文件
      //-----------------------------------------
      # include
   3. //-----------------------------------------
      //window 函数声明
      //-----------------------------------------
   4. int WINAPI WinMain(HINSTANCE hInsce, HINSTANCE hPeInsce,
             PSTR szCmdLine, int icmdShow);
   5.  
   6.  
   7. //-------------------------------------------
      //引擎类
      //-------------------------------------------
   8. class GameEngine
      {
      public:
       //构造函数
       GameEngine(HINSTANCE hInsce, LPSTR szwndClass, LPSTR szTle,
                WORD wIcon, WORD wSmlIcon, int iWidth = 800, int Height = 600);
   9. 
      virtual ~GameEngine();
                                    
      static GameEngine* GetEngine() {return m_pGameEngine; };
      BOOL  Init(int icmdShow);
      LRESULT  HandleEvent(HWND hwnd, UINT msg, WPARAM wp,
            LPARAM lp);
   10. 
       //访问方法
       HINSTANCE  GetInstance() {return m_hInsce; };
       HWND            GetWnd() {return m_hwnd; };
       void                SetWnd(HWND hwnd) {m_hwnd = hwnd; };
       LPSTR           GetTitle() {return m_szTle;};
       WORD           GetIcon() {return m_wIcon; };
       WORD           GetSmallIcon() {return m_smlIcon; };
       int                   GetWidth() {return m_iWidth; };
       int                  GetHeight() {return m_iHeight; };
       int                  GetFrameDelay() {return m_iFrameDelay; };
       void               SetFrameRate(int iFrameRate) {m_iFrameDelay = 1000 /
                              iFrameRate; };
       BOOL              GetSleep() {return m_bSleep; };
       void               SetSleep(BOOL bSleep) {m_bSleep = bSleep; };
   11.  
   12. protected:
        static GameEngine* m_pGameEngine;
        HINSTANCE  m_hInsce;
        HWND      m_hwnd;
        TCHAR     m_szwndClass[32];
        TCHAR     m_szTle[32];
        WORD      m_wIcon, m_smlIcon;
        int             m_iWidth, m_iHeight;
        int             m_iFrameDelay;
        BOOL      m_bSleep;
   13. };
   14.  
   15.  
   16.  
   17.  
   18. # include "GameEngine.h"
       # include "resource.h"
   19. //----------------------------------
       //静态变量初始化
       //-----------------------------------
   20. GameEngine* GameEngine::m_pGameEngine = NULL;
   21. GameEngine* g_pGame = NULL;
   22. 
       //------------------------------------------
       //游戏引擎函数声明 和定义
       //-------------------------------------------
   23. BOOL GameInit(HINSTANCE hInsce)
       {
        g_pGame = new GameEngine(hInsce, TEXT("billzzard"), TEXT("billzzard"), IDI_BLIZZARD, IDI_BLIZZARD_SM);
        
        if(NULL == g_pGame)
         return FALSE;
        
        g_pGame -> SetFrameRate(15);
        return TRUE;
        
       };
       void GameStart(HWND hwnd)
       {//生成随机数
        srand(GetTickCount());
       };
       void GameEnd()
       {
        //清理游戏引擎
        delete g_pGame;
       };
       void GameActivate(HWND hwnd)
       {
        HDC     hdc;
        RECT    rct;
   24.  //绘制文本
        GetClientRect(hwnd, &rct);
        hdc     =     GetDC(hwnd);
        DrawText(hdc, TEXT("here the blizzard!"), -1 , &rct,
         DT_SINGLELINE | DT_CENTER | DT_VCENTER);
        ReleaseDC(hwnd, hdc);
       };
   25. void GameDeactive(HWND hwnd)
       {
        
        HDC     hdc;
        RECT    rct;
        
        //绘制文本
        GetClientRect(hwnd, &rct);
        hdc     =     GetDC(hwnd);
        DrawText(hdc, TEXT("here the blizzard is passed!"), -1 , &rct,
         DT_SINGLELINE | DT_CENTER | DT_VCENTER);
        ReleaseDC(hwnd, hdc);
        
       };
   26. void GamePaint(HDC hdc)
       {
   27. };
   28. void GameCycle()
       {
        
        HDC     hdc;
           HWND hwnd = g_pGame -> GetWnd();
   29.  
        
        //随机出现雪花
        
        hdc     =     GetDC(hwnd);
        DrawIcon(hdc, rand() % g_pGame -> GetWidth(), rand() % g_pGame ->GetHeight(),
         (HICON)(WORD)GetClassLong(hwnd, GCL_HICON));
        ReleaseDC(hwnd, hdc);
       };
   30.  
   31. //------------------------------------
       //window 函数
       //------------------------------------
   32. int WINAPI WinMain(HINSTANCE hInsce, HINSTANCE hPeInsce,
              PSTR szCmdLine, int icmdShow)
   33. {
         MSG  msg;
         static int iTickTrigger = 0;
         int  iTickCount;
   34.   if(GameInit(hInsce))
         {
          //初始化游戏引擎
          if(!GameEngine::GetEngine() ->Init(icmdShow))
           return FALSE;
   35.    //进入主消息循环
          while(TRUE)
          {
           if(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
           {
            //处理消息
            if(msg.message == WM_QUIT)
             break;
            TranslateMessage(&msg);
            DispatchMessage(&msg);
           }
           else
           {
            //确保游戏引擎没有休眠
            if(!GameEngine::GetEngine() ->GetSleep())
            {
             //检查滴答计数，查看是否过了一个周期
             iTickCount = GetTickCount();
             if(iTickCount > iTickTrigger)
             {
              iTickTrigger = iTickCount +
               GameEngine::GetEngine() ->GetFrameDelay();
              GameCycle();
             }
            }
           }
          }
          return (int)msg.wParam;
   36.   }
         //结束游戏
         GameEnd();
         return TRUE;
       }
   37. LRESULT CALLBACK wpoc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
       {
        //将所有消息传递给引擎
        return GameEngine::GetEngine() ->HandleEvent(hwnd, msg, wp, lp);
       }
   38. 
       GameEngine::GameEngine(HINSTANCE hInsce, LPSTR szwndClass, LPSTR szTle,
               WORD wIcon, WORD wSmlIcon, int iWidth /* = 800 */, int Height /* = 600 */)
       {
        //设置游戏引擎成员变量
        m_pGameEngine = this;
        m_hInsce = hInsce;
        m_hwnd   = NULL;
        if(lstrlen(szwndClass) > 0)
         lstrcpy(m_szwndClass, szwndClass);
   39.  if(lstrlen(szTle) > 0)
         lstrcpy(m_szTle, szTle);
   40.  m_wIcon = wIcon;
        m_smlIcon = wSmlIcon;
        m_iWidth  = iWidth;
        m_iHeight = Height;
        m_iFrameDelay = 50;
        m_bSleep = TRUE;
       }
   41. GameEngine::~GameEngine()
       {
   42. }
   43. //---------------------------
       //游戏引擎常规方法
       //---------------------------
       BOOL GameEngine::Init(int cmdShow)
       {
        WNDCLASSEX wnd;
   44.  wnd.cbSize    = sizeof(wnd);
        wnd.style    = CS_HREDRAW | CS_VREDRAW;
        wnd.lpfnWndProc   = wpoc;
        wnd.cbClsExtra   = 0;
        wnd.cbWndExtra   = 0;
        wnd.hInstance   = m_hInsce;
        wnd.hIcon    = LoadIcon(m_hInsce,
         MAKEINTRESOURCE(GetIcon()));
        wnd.hIconSm    = LoadIcon(m_hInsce,
         MAKEINTRESOURCE(GetSmallIcon()));
        wnd.hCursor    = LoadCursor(NULL, IDC_ARROW);
        wnd.hbrBackground  = (HBRUSH)(COLOR_WINDOW + 1);
        wnd.lpszMenuName  = NULL;
        wnd.lpszClassName  = m_szwndClass;
   45.  if(!RegisterClassEx(&wnd))
         return FALSE;
   46.  
        m_hwnd = CreateWindow(m_szwndClass, m_szTle, WS_POPUPWINDOW |
         WS_CAPTION | WS_MINIMIZEBOX, 120, 120, 800, 600, NULL, NULL, m_hInsce, NULL);
   47.  if(!m_hwnd)
         return FALSE;
   48.  //显示和跟新窗口
        ShowWindow(m_hwnd, cmdShow);
        UpdateWindow(m_hwnd);
        return TRUE; 
       }
   49. LRESULT GameEngine::HandleEvent(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
       {
        //将Windows消息传递给游戏引擎成员函数
        switch(msg)
        {
        case WM_CREATE:
         //设置游戏窗口并开始游戏
         SetWnd(hwnd);
         GameStart(hwnd);
         return 0;
   50.  case WM_SETFOCUS:
         //激活并更新休眠状态
         GameActivate(hwnd);
         SetSleep(FALSE);
         return 0;
   51.  case WM_KILLFOCUS:
         //停用游戏并跟新
         GameDeactive(hwnd);
         SetSleep(TRUE);
         return 0;
   52.  case WM_PAINT:
         HDC  hdc;
         PAINTSTRUCT  ps;
         hdc  = BeginPaint(hwnd, &ps);
   53.   //绘制游戏
         GamePaint(hdc);
   54.   EndPaint(hwnd, &ps);
         return 0;
   55.  case WM_DESTROY:
         //结束游戏并退出游戏
         GameEnd();
         PostQuitMessage(0);
         return 0;
        }
        return DefWindowProc(hwnd, msg, wp, lp);
         
       }
   56. 基本添加资源的方法在网上都有教的，就是在自己的工程文件夹下新建。。。。rc 然后插入你的图片资源然后编译 rc文件，就会出现resource.h
   57. it is too late
   58. go to sleep!!!ZZZ
   59.