第一个 OpenGL 程序：旋转的立方体（VS2022 / MFC）源码

 // OpenGLCubeDemoDlg.cpp: 实现文件 // #include "pch.h" #include "framework.h" #include "OpenGLCubeDemo.h" #include "OpenGLCubeDemoDlg.h" #include "afxdialogex.h" #ifdef _DEBUG #define new DEBUG_NEW #endif #define STBI_WINDOWS_UTF8 #define STB_IMAGE_IMPLEMENTATION #include "stb_image.h" // COpenGLCubeDemoDlg 对话框 //#define IMAGE_PATH "Dragons.jpg" #define IMAGE_PATH "dice.png" COpenGLCubeDemoDlg::COpenGLCubeDemoDlg(CWnd* pParent /*=nullptr*/) : CDialogEx(IDD_OPENGLCUBEDEMO_DIALOG, pParent) { m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); } void COpenGLCubeDemoDlg::DoDataExchange(CDataExchange* pDX) { CDialogEx::DoDataExchange(pDX); } BEGIN_MESSAGE_MAP(COpenGLCubeDemoDlg, CDialogEx) ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_WM_SIZE() ON_WM_TIMER() ON_WM_DESTROY() END_MESSAGE_MAP() // COpenGLCubeDemoDlg 消息处理程序 BOOL COpenGLCubeDemoDlg::OnInitDialog() { CDialogEx::OnInitDialog(); // 设置此对话框的图标。 当应用程序主窗口不是对话框时，框架将自动 // 执行此操作 SetIcon(m_hIcon, TRUE); // 设置大图标 SetIcon(m_hIcon, FALSE); // 设置小图标 SetWindowText(_T("OpenGL Cube Demo - blog.csdn.net/blackwoodcliff")); //ShowWindow(SW_MAXIMIZE); // TODO: 在此添加额外的初始化代码 InitializeOpenGL(this->GetDC()->GetSafeHdc()); ShowWindow(SW_MAXIMIZE); m_glTexture = LoadGLTexture(); return TRUE; // 除非将焦点设置到控件，否则返回 TRUE } // 如果向对话框添加最小化按钮，则需要下面的代码 // 来绘制该图标。 对于使用文档/视图模型的 MFC 应用程序， // 这将由框架自动完成。 void COpenGLCubeDemoDlg::OnPaint() { if (IsIconic()) { CPaintDC dc(this); // 用于绘制的设备上下文 SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0); // 使图标在工作区矩形中居中 int cxIcon = GetSystemMetrics(SM_CXICON); int cyIcon = GetSystemMetrics(SM_CYICON); CRect rect; GetClientRect(&rect); int x = (rect.Width() - cxIcon + 1) / 2; int y = (rect.Height() - cyIcon + 1) / 2; // 绘制图标 dc.DrawIcon(x, y, m_hIcon); } else { CDialogEx::OnPaint(); glClearColor(0.0f, 0.05f, 0.15f, 1.0f); //glClearColor(0.06f, 0.06f, 0.06f, 1.0f); //glClearColor(0.085f, 0.2f, 0.414f, 1.0f); //glClearColor(0.1f, 0.1f, 0.1f, 1.0f); //glClear(GL_COLOR_BUFFER_BIT); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); //复位 //DrawRect(); //DrawCube(); //DrawTextureCube(); DrawDice(); glFlush(); SwapBuffers(wglGetCurrentDC()); } } //当用户拖动最小化窗口时系统调用此函数取得光标 //显示。 HCURSOR COpenGLCubeDemoDlg::OnQueryDragIcon() { return static_cast<HCURSOR>(m_hIcon); } bool COpenGLCubeDemoDlg::InitializeOpenGL(HDC hDC) { //设置 DC 像素格式 if (false == SetDCPixelFormat(hDC)) { return false; } //创建 RC HGLRC hRC = wglCreateContext(hDC); if (hRC == NULL) { return false; } //为当前线程设置 RC if (wglMakeCurrent(hDC, hRC) == FALSE) { return false; } glClearDepth(1.0f); glEnable(GL_TEXTURE_2D); // Enable Texture Mapping glEnable(GL_DEPTH_TEST); // Enables Depth Testing //glEnable(GL_MULTISAMPLE); glDepthFunc(GL_LEQUAL); // The Type Of Depth Testing To Do glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); // Really Nice Perspective Calculations return true; } bool COpenGLCubeDemoDlg::SetDCPixelFormat(HDC hDC) { static PIXELFORMATDESCRIPTOR pfd = { sizeof(PIXELFORMATDESCRIPTOR), //pfd结构的大小 1, //版本号 PFD_DRAW_TO_WINDOW | //支持在窗口中绘图 PFD_SUPPORT_OPENGL | //支持OpenGL PFD_DOUBLEBUFFER, //支持双缓冲 PFD_TYPE_RGBA, //RGBA颜色模式 32, //32位颜色深度 0, 0, 0, 0, 0, 0, //忽略颜色位 0, //没有非透明度缓存 0, //忽略移位位 0, //无累计缓存 0, 0, 0, 0, //忽略累计位 32, //32位深度缓存 0, //无模板缓存 0, //无辅助缓存 PFD_MAIN_PLANE, //主层 0, //保留 0, 0, 0 //忽略层，可见性和损毁掩模 }; //得到 DC 最匹配的像素格式 int pixelFormat = ChoosePixelFormat(hDC, &pfd); if (0 == pixelFormat) { //如果没有找到，就调用 DescribePixelFormat 函数来选择索引值为 1 的像素格式 pixelFormat = 1; if (DescribePixelFormat(hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd) == 0) { MessageBox(_T("ChoosePixelFormat 失败")); return false; } } //设置 DC 像素格式 if (SetPixelFormat(hDC, pixelFormat, &pfd) == FALSE) { MessageBox(_T("SetPixelFormat 失败")); return false; } return true; } void COpenGLCubeDemoDlg::DrawRect() { //glColor3ub(128, 0, 0); glColor3ub(96, 0, 0); glBegin(GL_QUADS); glVertex2f(-0.5, 0.5); //左上角 glVertex2f(-0.5, -0.5); //左下角 glVertex2f(0.5, -0.5); //右下角 glVertex2f(0.5, 0.5); //右上角 glEnd(); } void COpenGLCubeDemoDlg::DrawCube() { glTranslatef(0.0f, 0.0f, -2.5); glRotatef(m_rotationX, 1.0f, 0.0f, 0.0f); glRotatef(m_rotationY, 0.0f, 1.0f, 0.0f); glBegin(GL_QUADS); // Front Face glColor3ub(128, 0, 0); //红 glVertex3f(-0.5f, -0.5f, 0.5f); glVertex3f(0.5f, -0.5f, 0.5f); glVertex3f(0.5f, 0.5f, 0.5f); glVertex3f(-0.5f, 0.5f, 0.5f); // Back Face glColor3ub(128, 128, 0); //黄 glVertex3f(-0.5f, -0.5f, -0.5f); glVertex3f(0.5f, -0.5f, -0.5f); glVertex3f(0.5f, 0.5f, -0.5f); glVertex3f(-0.5f, 0.5f, -0.5f); // Top Face glColor3ub(0, 0, 128); //蓝 glVertex3f(-0.5f, 0.5f, 0.5f); glVertex3f(0.5f, 0.5f, 0.5f); glVertex3f(0.5f, 0.5f, -0.5f); glVertex3f(-0.5f, 0.5f, -0.5f); // Bottom Face glColor3ub(128, 0, 128); //紫 glVertex3f(-0.5f, -0.5f, 0.5f); glVertex3f(0.5f, -0.5f, 0.5f); glVertex3f(0.5f, -0.5f, -0.5f); glVertex3f(-0.5f, -0.5f, -0.5f); // Left Face glColor3ub(0, 128, 0); //绿 glVertex3f(-0.5f, -0.5f, -0.5f); glVertex3f(-0.5f, -0.5f, 0.5f); glVertex3f(-0.5f, 0.5f, 0.5f); glVertex3f(-0.5f, 0.5f, -0.5f); // Right face glColor3ub(0, 128, 128); //青 glVertex3f(0.5f, -0.5f, 0.5f); glVertex3f(0.5f, -0.5f, -0.5f); glVertex3f(0.5f, 0.5f, -0.5f); glVertex3f(0.5f, 0.5f, 0.5f); glEnd(); } void COpenGLCubeDemoDlg::DrawTextureCube() { glTranslatef(0.0f, 0.0f, -2.5); glRotatef(m_rotationX, 1.0f, 0.0f, 0.0f); glRotatef(m_rotationY, 0.0f, 1.0f, 0.0f); glBindTexture(GL_TEXTURE_2D, m_glTexture); glBegin(GL_QUADS); // Front Face glNormal3i(0, 0, 1); glTexCoord2i(0, 0); glVertex3f(-0.5f, -0.5f, 0.5f); glTexCoord2i(1, 0); glVertex3f(0.5f, -0.5f, 0.5f); glTexCoord2i(1, 1); glVertex3f(0.5f, 0.5f, 0.5f); glTexCoord2i(0, 1); glVertex3f(-0.5f, 0.5f, 0.5f); // Back Face glNormal3i(0, 0, -1); glTexCoord2i(1, 0); glVertex3f(-0.5f, -0.5f, -0.5f); glTexCoord2i(0, 0); glVertex3f(0.5f, -0.5f, -0.5f); glTexCoord2i(0, 1); glVertex3f(0.5f, 0.5f, -0.5f); glTexCoord2i(1, 1); glVertex3f(-0.5f, 0.5f, -0.5f); // Top Face glNormal3i(0, 1, 0); glTexCoord2i(0, 0); glVertex3f(-0.5f, 0.5f, 0.5f); glTexCoord2i(1, 0); glVertex3f(0.5f, 0.5f, 0.5f); glTexCoord2i(1, 1); glVertex3f(0.5f, 0.5f, -0.5f); glTexCoord2i(0, 1); glVertex3f(-0.5f, 0.5f, -0.5f); // Bottom Face glNormal3i(0, -1, 0); glTexCoord2i(0, 0); glVertex3f(-0.5f, -0.5f, 0.5f); glTexCoord2i(1, 0); glVertex3f(0.5f, -0.5f, 0.5f); glTexCoord2i(1, 1); glVertex3f(0.5f, -0.5f, -0.5f); glTexCoord2i(0, 1); glVertex3f(-0.5f, -0.5f, -0.5f); // Left Face glNormal3i(-1, 0, 0); glTexCoord2i(0, 0); glVertex3f(-0.5f, -0.5f, -0.5f); glTexCoord2i(1, 0); glVertex3f(-0.5f, -0.5