OpenGL入门14——MFC窗口中使用glut函数

调用glut函数前，要初始化glut,即调用glutInit();

例如：

        int argc=1;
char* argv[]={"MFC_GLUT"};
glutInit(&argc, argv);

再写一下MFC中添加OpenGL配置和glut初始化

1、view.h中添加成员

HGLRC m_hRC;	//Rendering Context
CDC* m_pDC;		//Device Context

2、view.cpp中添加成员

BOOL CXXXView::SetupPixelFormat()
{
	static PIXELFORMATDESCRIPTOR pfd = 
	{
		sizeof(PIXELFORMATDESCRIPTOR),  // size of this pfd
		1,                              // version number
		PFD_DRAW_TO_WINDOW |            // support window
		PFD_SUPPORT_OPENGL |		    // support OpenGL
		PFD_DOUBLEBUFFER,				// double buffered
		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
		16,                             // 16-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 m_nPixelFormat = ::ChoosePixelFormat(m_pDC->GetSafeHdc(), &pfd);

	if ( m_nPixelFormat == 0 )
	{
		return FALSE;
	}

	if ( ::SetPixelFormat(m_pDC->GetSafeHdc(), m_nPixelFormat, &pfd) == FALSE)
	{
		return FALSE;
	}

	return TRUE;
}

BOOL CXXXView::InitializeOpenGL()
{
	//Get a DC for the Client Area
	m_pDC = new CClientDC(this);

	//Failure to Get DC
	if(m_pDC == NULL)
	{
		MessageBox("Error Obtaining DC");
		return FALSE;
	}

	//Failure to set the pixel format
	if(!SetupPixelFormat())
	{
		return FALSE;
	}

	//Create Rendering Context
	m_hRC = ::wglCreateContext (m_pDC->GetSafeHdc ());

	//Failure to Create Rendering Context
	if(m_hRC == 0)
	{
		MessageBox("Error Creating RC");
		return FALSE;
	}

	//Make the RC Current
	if(::wglMakeCurrent (m_pDC->GetSafeHdc (), m_hRC)==FALSE)
	{
		MessageBox("Error making RC Current");
		return FALSE;
	}

	//Specify Black as the clear color
	::glClearColor(0.0f,0.0f,0.0f,0.0f);

	//Specify the back of the buffer as clear depth
	::glClearDepth(1.0f);

	//Enable Depth Testing
	::glEnable(GL_DEPTH_TEST);

	return TRUE;
}

3、在CXXXView::OnCreate()中添加以下代码

// TODO:  在此添加您专用的创建代码
	if( !InitializeOpenGL() )
	{
		TRACE0( "InitializeOpenGL failed !");
		return -1;
	}


	//初始化glut
	int argc=1;
	char* argv[]={"<span style="font-size: 13.3333339691162px;">MFC_GLUT</span>"};
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);

4、在CXXXView::OnDestory()中添加以下代码

// TODO: 在此处添加消息处理程序代码
	if(::wglMakeCurrent (0,0) == FALSE)
	{
		MessageBox("Could not make RC non-current");
	}

	//Delete the rendering context
	if(::wglDeleteContext (m_hRC)==FALSE)
	{
		MessageBox("Could not delete RC");
	}

	//Delete the DC
	if(m_pDC)
	{
		delete m_pDC;
	}
	//Set it to NULL
	m_pDC = NULL;

5、在CXXXView::OnDraw()中添加以下代码

// TODO: 在此处为本机数据添加绘制代码
	glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
	//RenderScene();//添加自己的绘制函数
	// Tell OpenGL to flush its pipeline
	::glFinish();
	// Now Swap the buffers
	::SwapBuffers( m_pDC->GetSafeHdc() );

6、在CXXXView::OnEraseBkgnd()中，修改返回值为TRUE，来消除闪屏问题

BOOL CXXXView::OnEraseBkgnd(CDC* pDC)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	return TRUE;
	return CView::OnEraseBkgnd(pDC);
}