VC6.0编译的OpenGL的Nurbs曲线的生成代码

// NurbsSurfView.cpp : implementation of the CNurbsSurfView class // #include "stdafx.h" #include "NurbsSurf.h" #include "NurbsSurfDoc.h" #include "NurbsSurfView.h" //add down #include "gl\gl.h" #include "gl\glu.h" #include "gl\glaux.h" //add up //定义控制顶点add down GLfloat ctrlpoints[4][4][3]; GLUnurbsObj* theNurb; //定义控制顶点add up //add down函数说明 void init_surface(void); //add up函数说明 #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CNurbsSurfView IMPLEMENT_DYNCREATE(CNurbsSurfView, CView) BEGIN_MESSAGE_MAP(CNurbsSurfView, CView) //{{AFX_MSG_MAP(CNurbsSurfView) ON_WM_CREATE() ON_WM_DESTROY() ON_WM_ERASEBKGND() ON_WM_SIZE() //}}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() ///////////////////////////////////////////////////////////////////////////// // CNurbsSurfView construction/destruction CNurbsSurfView::CNurbsSurfView() { //add down m_pDC = NULL; //add up } CNurbsSurfView::~CNurbsSurfView() { } BOOL CNurbsSurfView::PreCreateWindow(CREATESTRUCT& cs) { // TODO: Modify the Window class or styles here by modifying // the CREATESTRUCT cs //add down cs.style |= WS_CLIPSIBLINGS | WS_CLIPCHILDREN; //add up return CView::PreCreateWindow(cs); } ///////////////////////////////////////////////////////////////////////////// // CNurbsSurfView drawing void CNurbsSurfView::OnDraw(CDC* pDC) { CNurbsSurfDoc* pDoc = GetDocument(); ASSERT_VALID(pDoc); // TODO: add draw code for native data here //add down DrawScene(); //add up } ///////////////////////////////////////////////////////////////////////////// // CNurbsSurfView printing BOOL CNurbsSurfView::OnPreparePrinting(CPrintInfo* pInfo) { // default preparation return DoPreparePrinting(pInfo); } void CNurbsSurfView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add extra initialization before printing } void CNurbsSurfView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add cleanup after printing } ///////////////////////////////////////////////////////////////////////////// // CNurbsSurfView diagnostics #ifdef _DEBUG void CNurbsSurfView::AssertValid() const { CView::AssertValid(); } void CNurbsSurfView::Dump(CDumpContext& dc) const { CView::Dump(dc); } CNurbsSurfDoc* CNurbsSurfView::GetDocument() // non-debug version is inline { ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CNurbsSurfDoc))); return (CNurbsSurfDoc*)m_pDocument; } #endif //_DEBUG ///////////////////////////////////////////////////////////////////////////// // CNurbsSurfView message handlers int CNurbsSurfView::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CView::OnCreate(lpCreateStruct) == -1) return -1; //add down Init(); //初始化OpenGL //add up return 0; } void CNurbsSurfView::OnDestroy() { //add down HGLRC hrc; hrc = ::wglGetCurrentContext(); ::wglMakeCurrent(NULL, NULL); if (hrc) ::wglDeleteContext(hrc); if (m_pDC) delete m_pDC; //add up CView::OnDestroy(); } BOOL CNurbsSurfView::OnEraseBkgnd(CDC* pDC) { return TRUE; } void CNurbsSurfView::OnSize(UINT nType, int cx, int cy) { CView::OnSize(nType, cx, cy); //add down int w=cx; int h=cy; //避免除数为0 if(h==0) h=1; //设置视口与窗口匹配 glViewport(0, 0, (GLsizei) w, (GLsizei) h); //重新设置坐标系统 glMatrixMode(GL_PROJECTION); glLoadIdentity(); //建立透视变换下的剪切体 gluPerspective(45.0,(GLdouble)w/(GLdouble)h,3.0,8.0); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glTranslatef(0.0, 1.0, -5.0); //add up } //add down void CNurbsSurfView::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); //定义曲面材质为金色 GLfloat mat_diffuse[]={0.88,0.66,0.22,1.0}; GLfloat mat_specular[]={0.92,0.9,0.0,1.0}; GLfloat mat_shininess[]={80.0}; //将初始屏幕设置为白色 glClearColor(1.0,1.0,1.0,1.0); glMaterialfv(GL_FRONT,GL_DIFFUSE,mat_diffuse); glMaterialfv(GL_FRONT,GL_SPECULAR,mat_specular); glMaterialfv(GL_FRONT,GL_SHININESS,mat_shininess); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glDepthFunc(GL_LESS); glEnable(GL_DEPTH_TEST); glEnable(GL_AUTO_NORMAL); glEnable(GL_NORMALIZE); init_surface(); theNurb=gluNewNurbsRenderer(); gluNurbsProperty(theNurb,GLU_SAMPLING_TOLERANCE,25.0); gluNurbsProperty(theNurb,GLU_DISPLAY_MODE,GLU_FILL); } BOOL CNurbsSurfView::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_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 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; } void CNurbsSurfView::DrawScene(void) { GLfloat knots[8]={0.0,0.0,0.0,0.0,1.0,1.0,1.0,1.0}; //清除颜色缓冲区和深度缓冲区 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(theNurb); gluNurbsSurface(theNurb, 8,knots, 8,knots, 4*3,3, &ctrlpoints[0][0][0], 4,4, GL_MAP2_VERTEX_3); gluEndSurface(theNurb); glPopMatrix(); glFinish(); SwapBuffers(wglGetCurrentDC()); } //初始化控制点坐标，x,y,z范围从-3到3 void init_surface(void) { int u,v; for(u=0;u<4;u++) { for(v=0;v<4;v++) { ctrlpoints[u][v][0]=2.0*((GLfloat)u-1.5); ctrlpoints[u][v][1]=2.0*((GLfloat)v-1.5); if((u==1||u==2)&&(v==1||v==2)) ctrlpoints[u][v][2]=3.0; else ctrlpoints[u][v][2]=-3.0; } } } //add up