openGL中创建OpenGL Render Context的步骤 .
BOOL OpenGLInit(CClientDC* pDC,HGLRC& hglrc){int n;//当前选择的像素格式索引static PIXELFORMATDESCRIPTOR pfd={//像素点格式信息描述结构体sizeof(PIXELFORMATDESCRIPTOR),1, PFD_DRAW_TO_WINDOW |//支持Windows与OpenGL二环境绘图PFD_SUPPORT_OPENGL |PFD_DOUBLEBUFFER,//使用双缓存交换显示图形PFD_TYPE_RGBA, // RGBA type 24,// 24-bit color depth 0, 0, 0, 0, 0, 0,// color bits ignored 0,// no alpha buffer 0,// shift bit ignored 0,// no accumulation buffer 0, 0, 0, 0,// accum bits ignored 32,// 32-bit z-buffer 0,// no stencil buffer 0,// no auxiliary buffer PFD_MAIN_PLANE,// main layer 0,// reserved 0, 0, 0// layer masks ignored };int pixelformat;if((pixelformat=ChoosePixelFormat(pDC->GetSafeHdc(),&pfd))==0){AfxMessageBox("选择像素格式化失败");return FALSE;}if(SetPixelFormat(pDC->GetSafeHdc(),pixelformat,&pfd)==FALSE){AfxMessageBox("设置像素格式化失败");return FALSE;}n=::GetPixelFormat(pDC->GetSafeHdc());::DescribePixelFormat(pDC->GetSafeHdc(),n,sizeof(pfd),&pfd);hglrc = wglCreateContext(pDC->GetSafeHdc());//创建绘制情景对象wglMakeCurrent(pDC->GetSafeHdc(),hglrc);//选择绘制情景对象glClearDepth(1.0f);glEnable(GL_DEPTH_TEST);//glMatrixMode(GL_MODELVIEW);//设置变换模式为模型变换//glLoadIdentity();//初始化模型变换矩阵return TRUE;}BOOL OpenGLExit(CClientDC* pDC,HGLRC& hglrc){::wglMakeCurrent(NULL,NULL);//将当前绘图情景对象置空if(hglrc)::wglDeleteContext(hglrc);//删除当前绘图情景对象if(pDC)delete pDC;//删除创建的windows设备上下文return TRUE;}