游戏程序设计教程——从游戏引擎构建到实际应用课本代码

#include "T_Engine.h" HWND T_Engine::m_hWnd = NULL;//窗口句柄 HINSTANCE T_Engine::m_hInstance = NULL;//实例句柄 T_Engine *T_Engine::pEngine = NULL;//引擎类指针 //构造函数 T_Engine::T_Engine(HINSTANCE hInstance, LPCTSTR szWindowClass, LPCTSTR szTitle, WORD Icon, WORD SmIcon, int iWidth, int iHeight) { Gdiplus::GdiplusStartupInput gdiplusStartupInput; Gdiplus::GdiplusStartup(&ptrGdiplusToken, &gdiplusStartupInput, NULL); pEngine = this; m_hInstance = hInstance; wndClass = szWindowClass; wndTitle = szTitle; wndWidth = iWidth; wndHeight = iHeight; m_bFullScreen = FALSE; wIcon = Icon; wSmIcon = SmIcon; p_disp = new T_Display(); for (int i = 0; i < 256; i++) { keys[i] = false; } //创建内存缓冲设备及内存缓冲位图 bufferDC = CreateCompatibleDC(GetDC(m_hWnd)); bufferBitmap = CreateCompatibleBitmap(GetDC(m_hWnd), wndWidth, wndHeight); SelectObject(bufferDC, bufferBitmap); } //析构函数 T_Engine::~T_Engine() { delete p_disp; Gdiplus::GdiplusShutdown(ptrGdiplusToken);//关闭GDI+ } //回调函数 LONG CALLBACK T_Engine::WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) { return pEngine->GameEvent(hWnd, msg, wParam, lParam); } //游戏窗口初始化处理 BOOL T_Engine::GameWinInit() { WNDCLASSEX gamewin; gamewin.cbSize = sizeof(WNDCLASSEX); gamewin.style = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS; gamewin.lpfnWndProc = WndProc; gamewin.cbClsExtra = 0; gamewin.cbWndExtra = 0; gamewin.hInstance = m_hInstance; gamewin.hIcon = LoadIcon(m_hInstance, MAKEINTRESOURCE(wIcon)); gamewin.hCursor = LoadCursor(NULL, IDC_ARROW); gamewin.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1); gamewin.lpszMenuName = NULL; gamewin.lpszClassName = wndClass; gamewin.hIconSm = LoadIcon(m_hInstance, MAKEINTRESOURCE(wSmIcon)); if (!RegisterClassEx(&gamewin)) return FALSE; //使窗口居中，获取客户区全屏幕宽高 //如果要获取完全全屏幕宽高，包括任务栏高度，使用SM_CXSCREEN和SM_CYSCREEN scrnWidth = GetSystemMetrics(SM_CXFULLSCREEN);//屏幕宽度 scrnHeight = GetSystemMetrics(SM_CYFULLSCREEN);//屏幕高度 int x = (scrnWidth - wndWidth) / 2; int y = (scrnHeight - wndHeight) / 2; m_hWnd = CreateWindow(wndClass, wndTitle, WS_OVERLAPPEDWINDOW & ~WS_SIZEBOX, //禁止调整大小 x, y,wndWidth + 6, wndHeight + 28,//加上窗口边框和标题栏占用 NULL, NULL, m_hInstance, NULL); if (!m_hWnd) return FALSE; if (m_bFullScreen == TRUE)//如果是全屏幕显示 { GetWindowRect(m_hWnd, &m_rcOld);//记住当前窗口的尺寸 style = GetWindowLong(m_hWnd, GWL_STYLE); ex_style = GetWindowLong(m_hWnd, GWL_EXSTYLE); p_disp->SaveMode(); HWND hDesktop; RECT rc; hDesktop = GetDesktopWindow();//获取桌面窗口的指针 GetWindowRect(hDesktop, &rc);//得到桌面窗口的矩形 p_disp->ChangeMode(wndWidth, wndHeight); //设置为WS_DLGFRAME、WS_BORDER或WS_EX_CLLENTEDGE1都可以去掉标题栏 //设置扩展风格为WS_EX_WINDOWEDGE，去掉窗口边框 SetWindowLong(m_hWnd, GWL_EXSTYLE, WS_EX_WINDOWEDGE); SetWindowLong(m_hWnd, GWL_STYLE, WS_BORDER); SetWindowPos(m_hWnd, HWND_TOP, -1, -1, rc.right, rc.bottom, SWP_SHOWWINDOW); } ShowWindow(m_hWnd, SW_NORMAL); UpdateWindow(m_hWnd); return TRUE; } //附加键行为处理 void T_Engine::SubKeyAction(WPARAM wParam) { int x=0, y=0; if (wParam == VK_ESCAPE)//按下Esc键 { m_bFullScreen =! m_bFullScreen;//设置全屏显示标志 if (!m_bFullScreen)//恢复窗口模式 { p_disp->ResetMode(); SetWindowLong(m_hWnd, GWL_STYLE, style); SetWindowLong(m_hWnd, GWL_EXSTYLE, ex_style); int oldWidth = m_rcOld.right - m_rcOld.left; int oldHeight = m_rcOld.bottom - m_rcOld.top; x = m_rcOld.left; y = m_rcOld.top; SetWindowPos(m_hWnd, HWND_NOTOPMOST, x, y, oldWidth, oldHeight, SWP_SHOWWINDOW); } else//显示退出程序对话框 { ShowCursor(true);//显示光标 if (IDOK == MessageBox(NULL, L"你确定要退出吗？", wndTitle, MB_OKCANCEL | MB_ICONQUESTION)) { DestroyWindow(m_hWnd); } } } } //消息处理函数，将被回调函数调用 LONG T_Engine::GameEvent(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) { int x=0, y=0; HDC hdc; switch (msg) { case WM_SETFOCUS: SetSleep(FALSE); return 0; case WM_KILLFOCUS: SetSleep(TRUE); return 0; case WM_CREATE: m_hWnd = hWnd; GameInit(); return 0; case WM_LBUTTONDOWN://鼠标左键按下的处理 GameMouseAction(LOWORD(lParam), HIWORD(lParam), MOUSE_LCLICK); return 0; case WM_MOUSEMOVE://鼠标移动处理 GameMouseAction(LOWORD(lParam), HIWORD(lParam), MOUSE_MOVE); return 0; case WM_KEYDOWN://键被按下的处理 keys[wParam] = true;//记录对应的按键状态 GameKeyAction(KEY_DOWN);//执行游戏按键行为 SubKeyAction(wParam);//附加按键行为处理 return 0; case WM_KEYUP://释放按键处理 keys[wParam] = false; GameKeyAction(KEY_UP); return 0; case WM_NCLBUTTONDBLCLK://禁止双击窗口标题栏最大化窗口 if (HTCAPTION == wParam) return 0; case WM_SYSCOMMAND: if (wParam == SC_MAXIMIZE) { m_bFullScreen =! m_bFullScreen;//设置全屏显示标志 if (m_bFullScreen)//全屏幕显示 { GetWindowRect(hWnd, &m_rcOld);//记住当前窗口的尺寸 style = GetWindowLong(hWnd, GWL_STYLE); ex_style = GetWindowLong(hWnd, GWL_EXSTYLE); p_disp->SaveMode(); HWND hDesktop; RECT rc; hDesktop = GetDesktopWindow();//获取桌面窗口的指针 GetWindowRect(hDesktop, &rc);//得到桌面窗口的矩形 bool ok = p_disp->ChangeMode(wndWidth, wndHeight); //设置为WS_DLGFRAME、WS_BORDER或WS_EX_CLIENTEDGE都可以去掉标题栏 SetWindowLong(hWnd, GWL_EXSTYLE, WS_EX_WINDOWEDGE); SetWindowLong(hWnd, GWL_STYLE, WS_BORDER); SetWindowPos(hWnd, HWND_TOP, -1, -1, rc.right, rc.bottom, SWP_SHOWWINDOW); } } else if (wParam == SC_CLOSE) { if (IDOK == MessageBox(NULL, L"你确定要退出吗？", wndTitle, MB_OKCANCEL | MB_ICONQUESTION)) { DestroyWindow(hWnd); } } else { //由于WM_SYSCOMMAND消息不是程序控制的，所以必须将该消息传给DefWindowProc，否则会造成其他消息无法处理 return DefWindowProc(hWnd, WM_SYSCOMMAND, wParam, lParam); } return 0; case WM_CLOSE: DestroyWindow(hWnd); return 0; case WM_PAINT://窗口绘制 PAINTSTRUCT ps; hdc = BeginPaint(hWnd, &ps); GamePaint(hdc); EndPaint(hWnd, &ps); return 0; case WM_DESTROY://程序销毁 PostQuitMessage(0); return 0; } return DefWindowProc(hWnd, msg, wParam, lParam); } void T_Engine::StartEngine() { MSG msg; static int TickElapsed = 0; int nowTick; GameWinInit();//初始化游戏窗口 srand((unsigned)time(NULL));//初始化随机数 while (true)//游戏主循环 { if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) { //如果侦测到WM_QUIT则退出游戏循环 if (msg.message == WM_QUIT) break; TranslateMessage(&msg); DispatchMessage(&msg); } else { if (!GetSleep())//确保游戏没有进入睡眠状态 { nowTick = GetTickCount(); if (nowTick > TickElapsed)//判断游戏循环的时间 { TickElapsed = nowTick + GetInterval(); GameLogic();//处理游戏逻辑 GamePaint(bufferDC);//在内存中绘制内容 HDC hDC = GetDC(m_hWnd);//获取游戏窗口句柄及绘图设备 //将内存设备中绘制的内容绘到屏幕上 BitBlt(hDC, 0, 0, WIN_WIDTH, WIN_HEIGHT, bufferDC, 0, 0, SRCCOPY); ReleaseDC(m_hWnd, hDC);//释放设备 } } } } pEngine->GameEnd();//游戏结束处理 }