2D初始化及图形

点——GL_POINTS表示。

线——GL_LINES表示。

一连串线——GL_LINE_STRIP表示。

用线组成的环——GL_LINE_LOOP表示。

多边形——用GL_POLYGON表示。

三角形——用GL_TRIANGLES表示。

若干三角形串起来的——GL_TRIANGLE_STRIP表示。

若干三角形组成扇形——GL_TRIANGLE_FAN表示。

四边形——GL_GUADS表示。

若干四边形串起来——GL_QUAD_STRIP表示View.hprotected:CDC *m_pDC;HGLRC m_hRC;Void DrawScene();BOOL SetupPixelFormat(PIXELFORMATDESCRIPTOR *pPFD=0);BOOL CCTY817View::PreCreateWindow(CREATESTRUCT& cs){// TODO: Modify the Window class or styles here by modifying// the CREATESTRUCT cscs.style |= WS_CLIPSIBLINGS | WS_CLIPCHILDREN;return CView::PreCreateWindow(cs);}void CCTY817View::OnDraw(CDC* pDC){CCTY817Doc* pDoc = GetDocument();ASSERT_VALID(pDoc);// TODO: add draw code for native data hereDrawPoints();}CCTY817Doc* CCTY817View::GetDocument() // non-debug version is inline {ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CCTY817Doc)));return (CCTY817Doc*)m_pDocument;}void CCTY817View::OnDestroy(){CView::OnDestroy();// TODO: Add your message handler code hereif(wglMakeCurrent(0,0) == FALSE)::AfxMessageBox( "wglMakeCurrent failed" );if(m_hRC && (wglDeleteContext(m_hRC)== FALSE))::AfxMessageBox( "wglDeleteContext failed" );if(m_pDC)delete m_pDC;}int CCTY817View::OnCreate(LPCREATESTRUCT lpCreateStruct) {if (CView::OnCreate(lpCreateStruct) == -1)return -1;// TODO: Add your specialized creation code herem_pDC = new CClientDC(this); // get device contextif( m_pDC == NULL ){::AfxMessageBox( "fail to get device context" );return FALSE;}if( !SetupPixelFormat() ) // setup pixel format{::AfxMessageBox( "SetupPixelFormat failed" );return FALSE;}// get rendering contextif( ( m_hRC = wglCreateContext(m_pDC->GetSafeHdc()) ) == 0 ) {::AfxMessageBox( "wglCreateContext failed" );return FALSE;}// make current rendering contextif( wglMakeCurrent(m_pDC->GetSafeHdc(), m_hRC) == FALSE ) {::AfxMessageBox( "wglMakeCurrent failed" );return FALSE;}return 0;}BOOL CCTY817View::OnEraseBkgnd(CDC* pDC){// TODO: Add your message handler code here and/or call default//return CView::OnEraseBkgnd(pDC);return TRUE;}BOOL CCTY817View::SetupPixelFormat(PIXELFORMATDESCRIPTOR* pPFD){PIXELFORMATDESCRIPTOR pfd = {sizeof( PIXELFORMATDESCRIPTOR ),1,PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL,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;PIXELFORMATDESCRIPTOR* pPFDtoUse;pPFDtoUse = (0 == pPFD)? &pfd : pPFD;if ( 0 == ( pixelformat = ::ChoosePixelFormat( m_pDC->GetSafeHdc(), pPFDtoUse ) ) ) {::AfxMessageBox( "ChoosePixelFormat failed" );return FALSE;}if ( FALSE == ::SetPixelFormat( m_pDC->GetSafeHdc(), pixelformat, pPFDtoUse ) ) {::AfxMessageBox( "SetPixelFormat failed" );return FALSE;}return TRUE;}void CCTY817View::OnSize(UINT nType, int cx, int cy) {CView::OnSize(nType, cx, cy);glViewport(0,0,cx,cy);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluOrtho2D(0,500,0,500);}2D图形实心矩形void CCTY817View::DrawPolygon(){CRect rect;this->GetWindowRect(rect);Draw2D(rect.Width(),rect.Height());glClearColor(1.0f,1.0f,1.0f,1.0f);glClear(GL_COLOR_BUFFER_BIT);glColor3f(1.0f,0.0f,0.0f);glBegin(GL_POLYGON);glVertex2f(100,100);glVertex2f(100,200);glVertex2f(200,200);glVertex2f(200,100);glEnd();glFlush();}四个点void CCTY817View::DrawPoints(){CRect rect;this->GetWindowRect(rect);Draw2D(rect.Width(),rect.Height());glClearColor(1.0f,1.0f,1.0f,1.0f);glClear(GL_COLOR_BUFFER_BIT);glPointSize(5.0);glBegin(GL_POINTS);glColor3f(1.0f,0.0f,0.0f);glVertex2f(100,100);glColor3f(0.0f,1.0f,0.0f);glColor3f(0.0f,0.0f,1.0f);glVertex2f(200,200);glColor3f(0.0f,0.0f,0.0f);glVertex2f(200,100);glEnd();glFlush();}两条线void CCTY817View::DrawLines(){CRect rect;this->GetWindowRect(rect);Draw2D(rect.Width(),rect.Height());glClearColor(1.0f,1.0f,1.0f,1.0f);glClear(GL_COLOR_BUFFER_BIT);glLineWidth(5.0);glBegin(GL_LINES);glColor3f(1.0f,0.0f,0.0f);glVertex2f(100,100);glColor3f(0.0f,1.0f,0.0f);glVertex2f(100,200);glColor3f(0.0f,0.0f,1.0f);glVertex2f(200,200);glColor3f(0.0f,0.0f,0.0f);glVertex2f(200,100);glEnd();glFlush();}不封闭矩形void CCTY817View::DrawLineStrip() {CRect rect;this->GetWindowRect(rect);Draw2D(rect.Width(),rect.Height());glClearColor(1.0f,1.0f,1.0f,1.0f);glClear(GL_COLOR_BUFFER_BIT);glLineWidth(5.0);glBegin(GL_LINE_STRIP);glColor3f(1.0f,0.0f,0.0f);glVertex2f(100,100);glColor3f(0.0f,1.0f,0.0f);glColor3f(0.0f,0.0f,1.0f);glVertex2f(200,200);glColor3f(0.0f,0.0f,0.0f);glVertex2f(200,100);glEnd();glFlush();}封闭矩形void CCTY817View::DrawLineLoop() {CRect rect;this->GetWindowRect(rect);Draw2D(rect.Width(),rect.Height());glClearColor(1.0f,1.0f,1.0f,1.0f);glClear(GL_COLOR_BUFFER_BIT);glLineWidth(5.0);glBegin(GL_LINE_LOOP);glColor3f(1.0f,0.0f,0.0f);glVertex2f(100,100);glColor3f(0.0f,1.0f,0.0f);glVertex2f(100,200);glColor3f(0.0f,0.0f,1.0f);glVertex2f(200,200);glColor3f(0.0f,0.0f,0.0f);glVertex2f(200,100);glEnd();glFlush();}虚线矩形void CCTY817View::DrawLineStipple() {CRect rect;this->GetWindowRect(rect);Draw2D(rect.Width(),rect.Height());glClearColor(1.0f,1.0f,1.0f,1.0f);glClear(GL_COLOR_BUFFER_BIT);glEnable(GL_LINE_STIPPLE);glLineWidth(5.0);glLineStipple(3,0xcccc);glBegin(GL_LINE_LOOP);glColor3f(1.0f,0.0f,0.0f);glColor3f(0.0f,1.0f,0.0f);glVertex2f(100,200);glColor3f(0.0f,0.0f,1.0f);glVertex2f(200,200);glColor3f(0.0f,0.0f,0.0f);glVertex2f(200,100);glEnd();glDisable(GL_LINE_STIPPLE);glFlush();}实心三角形void CCTY817View::DrawTriangles() {CRect rect;this->GetWindowRect(rect);Draw2D(rect.Width(),rect.Height());glClearColor(1.0f,1.0f,1.0f,1.0f);glClear(GL_COLOR_BUFFER_BIT);glLineWidth(1.0);glBegin(GL_TRIANGLES);glColor3f(1.0f,0.0f,0.0f);glVertex2f(100,100);glColor3f(0.0f,1.0f,0.0f);glVertex2f(100,200);glColor3f(0.0f,0.0f,1.0f);glVertex2f(200,200);glColor3f(0.0f,0.0f,0.0f);glVertex2f(200,100);glEnd();glFlush();}交叠三角形void CCTY817View::DrawTriangleStrip() {CRect rect;this->GetWindowRect(rect);Draw2D(rect.Width(),rect.Height());glClearColor(1.0f,1.0f,1.0f,1.0f);glClear(GL_COLOR_BUFFER_BIT);glLineWidth(1.0);glBegin(GL_TRIANGLE_STRIP);glColor3f(1.0f,0.0f,0.0f);glVertex2f(100,100);glColor3f(0.0f,1.0f,0.0f);glVertex2f(100,200);glColor3f(0.0f,0.0f,1.0f);glVertex2f(200,200);glColor3f(0.0f,0.0f,0.0f);glVertex2f(200,100);glEnd();glFlush();}实心矩形void CCTY817View::DrawTriangleFan(){CRect rect;this->GetWindowRect(rect);Draw2D(rect.Width(),rect.Height());glClearColor(1.0f,1.0f,1.0f,1.0f);glClear(GL_COLOR_BUFFER_BIT);glLineWidth(1.0);glBegin(GL_TRIANGLE_FAN);glColor3f(1.0f,0.0f,0.0f);glVertex2f(100,100);glColor3f(0.0f,1.0f,0.0f);glVertex2f(100,200);glColor3f(0.0f,0.0f,1.0f);glVertex2f(200,200);glColor3f(0.0f,0.0f,0.0f);glVertex2f(200,100);glEnd();glFlush();}两个三角形框void CCTY817View::DrawQuads(){CRect rect;this->GetWindowRect(rect);Draw2D(rect.Width(),rect.Height());glClearColor(1.0f,1.0f,1.0f,1.0f);glClear(GL_COLOR_BUFFER_BIT);glLineWidth(1.0);glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);glColor3f(1.0f,0.0f,0.0f);glBegin(GL_QUADS);glVertex2f(100,100);glVertex2f(100,200);glVertex2f(200,200);glVertex2f(200,100);glVertex2f(300,100);glVertex2f(300,200);glVertex2f(400,200);glVertex2f(400,100);glEnd();glFlush();}两个矩形框void CCTY817View::DrawQuadStrip(){CRect rect;this->GetWindowRect(rect);Draw2D(rect.Width(),rect.Height());glClearColor(1.0f,1.0f,1.0f,1.0f);glClear(GL_COLOR_BUFFER_BIT);glLineWidth(1.0);glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);glColor3f(1.0f,0.0f,0.0f);glBegin(GL_QUAD_STRIP);glVertex2f(100,100);glVertex2f(100,200);glVertex2f(200,100);glVertex2f(200,200);glVertex2f(300,100);glVertex2f(300,200);glVertex2f(400,100);glVertex2f(400,200);glEnd();glFlush();}三个矩形框void CCTY817View::DrawPolygon2(){CRect rect;this->GetWindowRect(rect);Draw2D(rect.Width(),rect.Height());glClearColor(1.0f,1.0f,1.0f,1.0f);glClear(GL_COLOR_BUFFER_BIT);glLineWidth(1.0);glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);glColor3f(1.0f,0.0f,0.0f);glBegin(GL_POLYGON);glVertex2f(100,100);glVertex2f(100,200);glVertex2f(200,200);glVertex2f(300,200);glVertex2f(400,200);glVertex2f(400,100);glVertex2f(300,100);glVertex2f(200,100);glEnd();glFlush();}长矩形框void CCTY817View::DrawQuadStrip2(){CRect rect;this->GetWindowRect(rect);Draw2D(rect.Width(),rect.Height());glClearColor(1.0f,1.0f,1.0f,1.0f);glClear(GL_COLOR_BUFFER_BIT);glLineWidth(1.0);glColor3f(1.0f,1.0f,0.0f);glBegin(GL_QUAD_STRIP);glVertex2f(100,100);glVertex2f(100,200);glVertex2f(200,100);glVertex2f(200,200);glVertex2f(300,100);glVertex2f(300,200);glVertex2f(400,100);glVertex2f(400,200);glEnd();glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);glColor3f(1.0f,0.0f,0.0f);glBegin(GL_QUAD_STRIP);glVertex2f(100,100);glVertex2f(100,200);glVertex2f(200,100);glVertex2f(200,200);glVertex2f(300,100);glVertex2f(300,200);glVertex2f(400,100);glVertex2f(400,200);glEnd();glFlush();}诡异三角形void CCTY817View::Gasket(){CRect rect;this->GetWindowRect(rect);Draw2D(rect.Width(),rect.Height());glClearColor(1.0f,1.0f,1.0f,1.0f);glClear(GL_COLOR_BUFFER_BIT);glLineWidth(1.0);glColor3f(1.0f,0.0f,0.0f);typedef GLfloat point2[2];/* arbitrary triangle */point2 vertices[3] = {{0.0,0.0},{250.0,500.0},{500.0,0.0}};/* any desired initial point */point2 p = {75.0,75.0};for(int i=0; i<5000; i++) {/* pick a random vertex from 0,1,2 */int j=rand()%3;/* compute new point */p[0] = (p[0]+vertices[j][0])/2.0;p[1] = (p[1]+vertices[j][1])/2.0;/* display new point */glBegin(GL_POINTS);glVertex2fv(p);glEnd();}glFlush();}。