VC利用OpenGL绘制NURBS曲线.rar

// OPENGLNURBSView.cpp : implementation of the COPENGLNURBSView class // #include "stdafx.h" #include "OPENGLNURBS.h" #include "OPENGLNURBSDoc.h" #include "OPENGLNURBSView.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // COPENGLNURBSView IMPLEMENT_DYNCREATE(COPENGLNURBSView, CView) BEGIN_MESSAGE_MAP(COPENGLNURBSView, CView) //{{AFX_MSG_MAP(COPENGLNURBSView) ON_WM_SIZE() ON_WM_CREATE() //}}AFX_MSG_MAP // Standard printing commands ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint) ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint) ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview) END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // COPENGLNURBSView construction/destruction COPENGLNURBSView::COPENGLNURBSView() { // TODO: add construction code here } COPENGLNURBSView::~COPENGLNURBSView() { } BOOL COPENGLNURBSView::PreCreateWindow(CREATESTRUCT& cs) { // TODO: Modify the Window class or styles here by modifying // the CREATESTRUCT cs cs.style |= WS_CLIPSIBLINGS | WS_CLIPCHILDREN; return CView::PreCreateWindow(cs); } ///////////////////////////////////////////////////////////////////////////// // COPENGLNURBSView drawing void COPENGLNURBSView::OnDraw(CDC* pDC) { COPENGLNURBSDoc* pDoc = GetDocument(); ASSERT_VALID(pDoc); GLfloat diffuse[]={0.88,0.66,0.22,1.0}; GLfloat specular[]={0.92,0.9,0.0,1.0}; GLfloat shininess[]={80.0}; glClearColor(0.0,0.0,0.0,1.0); glMaterialfv(GL_FRONT,GL_DIFFUSE,diffuse); glMaterialfv(GL_FRONT,GL_SPECULAR,specular); glMaterialfv(GL_FRONT,GL_SHININESS,shininess); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glDepthFunc(GL_LESS); glEnable(GL_DEPTH_TEST); glEnable(GL_AUTO_NORMAL); glEnable(GL_NORMALIZE); int u, v; for (u=0;u<4;u++) { for(v=0;v<4;v++) { point[u][v][0]=2.0*((GLfloat)u-1.5); point[u][v][1]=2.0*((GLfloat)v-1.5); if((u==1||u==2)&&(v==1||v==2)) point[u][v][2]=3.0; else point[u][v][2]=-3.0; } } nurb=gluNewNurbsRenderer(); gluNurbsProperty(nurb,GLU_SAMPLING_TOLERANCE,25.0); gluNurbsProperty(nurb,GLU_DISPLAY_MODE,GLU_FILL); GLfloat knots[8]={0.0,0.0,0.0,0.0,1.0,1.0,1.0,1.0}; glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); glPushMatrix(); glRotatef(330.0,1.0,0.0,0.0); glScalef(0.5,0.5,0.5); gluBeginSurface(nurb); gluNurbsSurface(nurb, 8, knots, 8, knots, 4*3, 3, &point[0][0][0], 4,4, GL_MAP2_VERTEX_3); gluEndSurface(nurb); glPopMatrix(); glFlush(); if(FALSE==::SwapBuffers(m_pContextDC->GetSafeHdc())) AfxMessageBox("交换缓冲区失败"); } ///////////////////////////////////////////////////////////////////////////// // COPENGLNURBSView printing BOOL COPENGLNURBSView::OnPreparePrinting(CPrintInfo* pInfo) { // default preparation return DoPreparePrinting(pInfo); } void COPENGLNURBSView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add extra initialization before printing } void COPENGLNURBSView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add cleanup after printing } ///////////////////////////////////////////////////////////////////////////// // COPENGLNURBSView diagnostics #ifdef _DEBUG void COPENGLNURBSView::AssertValid() const { CView::AssertValid(); } void COPENGLNURBSView::Dump(CDumpContext& dc) const { CView::Dump(dc); } COPENGLNURBSDoc* COPENGLNURBSView::GetDocument() // non-debug version is inline { ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(COPENGLNURBSDoc))); return (COPENGLNURBSDoc*)m_pDocument; } #endif //_DEBUG ///////////////////////////////////////////////////////////////////////////// // COPENGLNURBSView message handlers void COPENGLNURBSView::OnSize(UINT nType, int cx, int cy) { CView::OnSize(nType,cx,cy); if(0>=cx||0>=cy) { return; } ::glViewport(0,0,cx,cy); ::glMatrixMode(GL_PROJECTION); ::glLoadIdentity(); GLdouble dblaspect=(GLdouble)cx/(GLdouble)cy; ::gluPerspective(45.0f,dblaspect,3.0f, 8.0f); ::glMatrixMode(GL_MODELVIEW); ::glLoadIdentity(); ::glTranslatef(0.0f,1.0f,-5.0f); } int COPENGLNURBSView::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CView::OnCreate(lpCreateStruct) == -1) return -1; m_pContextDC=new CClientDC(this); ASSERT(m_pContextDC); static PIXELFORMATDESCRIPTOR pfd = { sizeof(PIXELFORMATDESCRIPTOR), // 1, // PFD_DRAW_TO_WINDOW| // PFD_SUPPORT_OPENGL| // PFD_DOUBLEBUFFER, // PFD_TYPE_RGBA, // 24, // 0, 0, 0, 0, 0, 0, // 0, // 0, // 0, // 0, 0, 0, 0, // 16, // 0, // 0, // PFD_MAIN_PLANE, // 0, // 0, 0, 0 // }; int pixelformat=::ChoosePixelFormat(m_pContextDC->GetSafeHdc(),&pfd); if(pixelformat==0) { AfxMessageBox("初始化失败"); return -1; } SetPixelFormat(m_pContextDC->GetSafeHdc(),pixelformat,&pfd); m_hOpenglRC=wglCreateContext(m_pContextDC->GetSafeHdc()); wglMakeCurrent(m_pContextDC->GetSafeHdc(),m_hOpenglRC); return 0; } BOOL COPENGLNURBSView::DestroyWindow() { wglDeleteContext(m_hOpenglRC); delete m_pContextDC; return CView::DestroyWindow(); }