www.pudn.com > VC++OpenGL.rar > Step1View.cpp

// Step1View.cpp : implementation of the CStep1View class 
// 
 
#include "stdafx.h" 
#include "Step1.h" 
 
#include "Step1Doc.h" 
#include "Step1View.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CStep1View 
 
IMPLEMENT_DYNCREATE(CStep1View, CView) 
 
BEGIN_MESSAGE_MAP(CStep1View, CView) 
	//{{AFX_MSG_MAP(CStep1View) 
	ON_WM_CREATE() 
	ON_WM_SIZE() 
	ON_WM_DESTROY() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CStep1View construction/destruction 
 
CStep1View::CStep1View() 
{ 
	// TODO: add construction code here 
	m_pDC=NULL; 
 
} 
 
CStep1View::~CStep1View() 
{ 
} 
 
BOOL CStep1View::PreCreateWindow(CREATESTRUCT& cs) 
{ 
	// TODO: Modify the Window class or styles here by modifying 
	//  the CREATESTRUCT cs 
	cs.style|=WS_CLIPCHILDREN|WS_CLIPSIBLINGS; 
 
	return CView::PreCreateWindow(cs); 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CStep1View drawing 
 
void CStep1View::OnDraw(CDC* pDC) 
{ 
	CStep1Doc* pDoc = GetDocument(); 
	ASSERT_VALID(pDoc); 
 
	// TODO: add draw code for native data here 
	DrawScene(); 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CStep1View diagnostics 
 
#ifdef _DEBUG 
void CStep1View::AssertValid() const 
{ 
	CView::AssertValid(); 
} 
 
void CStep1View::Dump(CDumpContext& dc) const 
{ 
	CView::Dump(dc); 
} 
 
CStep1Doc* CStep1View::GetDocument() // non-debug version is inline 
{ 
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CStep1Doc))); 
	return (CStep1Doc*)m_pDocument; 
} 
#endif //_DEBUG 
 
///////////////////////////////////////////////////////////////////////////// 
// CStep1View message handlers 
 
void CStep1View::Init() 
{ 
   PIXELFORMATDESCRIPTOR pfd; 
    int         n; 
	HGLRC		hrc; 
 
    m_pDC = new CClientDC(this); 
    ASSERT(m_pDC != NULL); 
    if (!bSetupPixelFormat()) 
        return; 
 
    n =::GetPixelFormat(m_pDC->GetSafeHdc()); 
    ::DescribePixelFormat(m_pDC->GetSafeHdc(), n, sizeof(pfd), &pfd); 
    hrc = wglCreateContext(m_pDC->GetSafeHdc()); 
    wglMakeCurrent(m_pDC->GetSafeHdc(), hrc); 
 
    GetClientRect(&m_oldRect); 
 
    glClearDepth(1.0f); 
    glEnable(GL_DEPTH_TEST); 
	glMatrixMode(GL_MODELVIEW); 
	glLoadIdentity(); 
 
} 
 
BOOL CStep1View::bSetupPixelFormat() 
{ 
static PIXELFORMATDESCRIPTOR pfd =  
{ 
        sizeof(PIXELFORMATDESCRIPTOR),  // size of this pfd 
        1,                              // version number 
        PFD_DRAW_TO_WINDOW |            // support window 
          PFD_SUPPORT_OPENGL,			// support OpenGL 
        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(m_pDC->GetSafeHdc(), &pfd)) == 0 ) 
    { 
        MessageBox("ChoosePixelFormat failed"); 
        return FALSE; 
    } 
    if (SetPixelFormat(m_pDC->GetSafeHdc(), pixelformat, &pfd) == FALSE) 
    { 
        MessageBox("SetPixelFormat failed"); 
        return FALSE; 
    } 
    return TRUE; 
} 
 
int CStep1View::OnCreate(LPCREATESTRUCT lpCreateStruct)  
{ 
	if (CView::OnCreate(lpCreateStruct) == -1) 
		return -1; 
	 
	// TODO: Add your specialized creation code here 
	Init(); 
	 
	return 0; 
} 
 
void CStep1View::DrawScene() 
{ 
	 
	glClearColor(0.0f, 0.0f, 0.0f, 1.0f); 
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); 
	glColor3f(1.0f, 1.0f, 1.0f); 
	glBegin(GL_LINES); 
		glVertex2f(0.0f,0.0f); 
		glVertex2f(1.0f,1.0f); 
	glEnd(); 
    glFinish(); 
} 
 
void CStep1View::OnSize(UINT nType, int cx, int cy)  
{ 
	CView::OnSize(nType, cx, cy); 
	 
	// TODO: Add your message handler code here 
	if(cy > 0) 
    {  
	   if((m_oldRect.right > cx) || (m_oldRect.bottom > cy)) 
            RedrawWindow(); 
        m_oldRect.right = cx; 
        m_oldRect.bottom = cy; 
        glMatrixMode(GL_PROJECTION); 
        glLoadIdentity(); 
        glFrustum(-1.0,1.0,-1.0,1.0,0.0,7.0); 
        glViewport(0, 0, cx, cy); 
    } 
} 
 
void CStep1View::OnDestroy()  
{ 
	// TODO: Add your message handler code here 
	HGLRC	hrc; 
 
	hrc = ::wglGetCurrentContext(); 
    ::wglMakeCurrent(NULL,  NULL); 
    if (hrc) 
        ::wglDeleteContext(hrc); 
    if (m_pDC) 
        delete m_pDC; 
	CView::OnDestroy(); 
}