OpenGL画点

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#include <Windows.h>#include <gl/GL.h>#include <gl/GLU.h>#pragma  comment(lib,"opengl32.lib")#pragma comment(lib,"glu32.lib")LRESULT CALLBACK GLWindowProc(HWND hwnd, UINT msg,   WPARAM wParam, LPARAM lParam){switch (msg){case WM_CLOSE://关闭窗口PostQuitMessage(0);break;}return DefWindowProc(hwnd,msg,wParam,lParam); }INT WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nShowCmd){//register classWNDCLASSEX wndclass;wndclass.cbClsExtra = 0;wndclass.cbSize = sizeof(WNDCLASSEX);wndclass.cbWndExtra=0; //无需为窗口准备额外存储空间wndclass.hbrBackground = NULL;//窗口背景无需额外东西，整个都是openGLwndclass.hCursor = NULL;//鼠标光标wndclass.hIcon = LoadCursor(NULL,IDC_ARROW);//生成程序在文件夹中的图标wndclass.hIconSm = NULL;//窗口在左上角显示图标wndclass.hInstance = hInstance;//windows窗口传进来的实例wndclass.lpfnWndProc = GLWindowProc;//鼠标键盘   消息响应函数wndclass.lpszClassName = L"GLWindow";//唯一标识符wndclass.lpszMenuName = NULL;//菜单wndclass.style = CS_VREDRAW | CS_HREDRAW;//class style  垂直  水平ATOM atom = RegisterClassEx(&wndclass);//注册，会返回一个标记if(!atom){return 0;}   //create windowHWND hwnd = CreateWindowEx(NULL, L"GLWindow", L"OpenGL Window", WS_OVERLAPPEDWINDOW, 100, 100, 800, 600, NULL, NULL, hInstance, NULL);// 1.额外窗口风格 2.之前注册的Class name 3.窗口名字 4.建立窗口风格5,创建起始位置 x.y 宽度 高度  9.父窗口，10.菜单 11.hinstance 12.其他参数//create opengl render contextHDC dc = GetDC(hwnd);PIXELFORMATDESCRIPTOR pfd;//素格式描述符memset(&pfd,0, sizeof(PIXELFORMATDESCRIPTOR));pfd.nVersion = 1;pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);pfd.cColorBits = 32;//深度缓冲区pfd.cDepthBits = 24;//颜色缓冲区pfd.cStencilBits = 8;pfd.iPixelType = PFD_TYPE_RGBA;pfd.iLayerType = PFD_MAIN_PLANE;pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;//双缓冲区。学校老师上课讲的终于用上了T-T 前台缓冲区和后台缓冲区，指针交换！int pixelFormat = ChoosePixelFormat(dc, &pfd);//选择一个颜色格式SetPixelFormat(dc, pixelFormat, &pfd);//告诉dc 选择像素格式出来，叫做pixelformatHGLRC rc =  wglCreateContext(dc);wglMakeCurrent(dc, rc);//做成当前渲染设备//setup opengl context complete//opengl initglMatrixMode(GL_PROJECTION);//tell the gpu processer that i would select the projectgluPerspective(50.0f, 800.0f / 600.0f, 0.1f, 1000.0f);//set some values to projectionsglMatrixMode(GL_MODELVIEW);//tell  .. model view matrixglLoadIdentity();//给定个单位矩阵glClearColor(0.1, 0.4, 0.6, 1.0);//show windowShowWindow(hwnd, SW_SHOW);UpdateWindow(hwnd);MSG msg;while(true){if (PeekMessage(&msg, NULL, NULL, NULL, PM_REMOVE))//抓到消息，从所有地方，抓所有消息，无任何过滤，从消息队列顶端移除掉{//处理消息if(msg.message==WM_QUIT)//判断是否是退出消息{break;}TranslateMessage(&msg);//转换消息类型DispatchMessage(&msg);}//draw sceneglClear(GL_COLOR_BUFFER_BIT);glColor4ub(255, 255, 255, 255);//每个颜色占8字节  set color: whiteglPointSize(20.0f);glBegin(GL_POINTS);//start to draw somethingglVertex3f(0.0f, 0.0f, -0.5f);  glEnd(); //end//present sceneSwapBuffers(dc);//交换缓冲区， 前后}return 0;}
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