在VC中实现OpenGL三维绘图-实例

// Test1View.cpp : implementation of the CTest1View class // #include "stdafx.h" #include "Test1.h" #include "Test1Doc.h" #include "Test1View.h" #include "MainFrm.h" #include "ControlWnd.h" #include "ProjectView.h" #include "math.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif GLfloat Databuf[ArrayOne][ArrayTwo]; GLfloat xrof,yrof,zrof;//各坐标轴倾角 ///////////////////////////////////////////////////////////////////////////// // CTest1View extern bool gbIsGetData; extern bool gbDataIsEmpty; IMPLEMENT_DYNCREATE(CTest1View, CView) BEGIN_MESSAGE_MAP(CTest1View, CView) //{{AFX_MSG_MAP(CTest1View) ON_WM_CREATE() ON_WM_DESTROY() ON_WM_SIZE() ON_COMMAND(IDC_TURNX, OnTurnx) ON_COMMAND(IDC_TURNY, OnTurny) ON_COMMAND(IDC_TURNZ, OnTurnz) ON_WM_ERASEBKGND() ON_COMMAND(IDC_RESUME, OnResume) ON_WM_MOUSEWHEEL() ON_WM_LBUTTONDOWN() ON_WM_LBUTTONUP() ON_WM_MOUSEMOVE() ON_WM_CONTEXTMENU() ON_WM_KILLFOCUS() //}}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() ///////////////////////////////////////////////////////////////////////////// // CTest1View construction/destruction CTest1View::CTest1View() { m_pDC = NULL; nWithy = 0; m_Prox = 60; m_Proy = 5; m_Proz = 10; m_First = 1; m_Second = 2; m_Third = 3; m_bDown = false; m_bIsMove = true; m_bGetFileSuccess = true; m_pFr = NULL; m_FileName = "data/t56a.3DSF"; m_nMinDepth = 520.00f; m_nMaxDepth = 3299.875 ; m_bMoveSel = false; m_SelType = 0; m_Zoom = 0; m_xMove = m_yMove = m_zMove = 0; m_bLighting = false; } CTest1View::~CTest1View() { if (m_pDC) { delete m_pDC; m_pDC = NULL; } } BOOL CTest1View::PreCreateWindow(CREATESTRUCT& cs) { // TODO: Modify the Window class or styles here by modifying // the CREATESTRUCT cs return CView::PreCreateWindow(cs); } ///////////////////////////////////////////////////////////////////////////// // CTest1View drawing void CTest1View::OnDraw(CDC* pDC) { CTest1Doc* pDoc = GetDocument(); ASSERT_VALID(pDoc); //清除颜色缓冲和深度缓冲 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //用单位矩阵替换当前矩阵 glLoadIdentity(); //旋转角度 glRotatef(xrof,1.0f,0.0f,0.0f);//x轴 glRotatef(yrof,0.0f,1.0f,0.0f);//y轴 glRotatef(zrof,0.0f,0.0f,1.0f);//z轴 //选择框 if( this->m_pFr->m_pCtrlWnd->m_bShowConsult) this->Draw3DRect(); //画点 this->PutPoint(); //坐标系和文字 if (this->m_pFr->m_pCtrlWnd->m_bShowCoordinate) { this->DrawLines(); this->DrawText(); } //强制绘图完成 glFinish(); //交换缓冲区数据 SwapBuffers(wglGetCurrentDC()); //画选中区域 this->DrawSelArea(pDC); } ///////////////////////////////////////////////////////////////////////////// // CTest1View printing BOOL CTest1View::OnPreparePrinting(CPrintInfo* pInfo) { // default preparation return DoPreparePrinting(pInfo); } void CTest1View::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add extra initialization before printing } void CTest1View::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add cleanup after printing } ///////////////////////////////////////////////////////////////////////////// // CTest1View diagnostics #ifdef _DEBUG void CTest1View::AssertValid() const { CView::AssertValid(); } void CTest1View::Dump(CDumpContext& dc) const { CView::Dump(dc); } CTest1Doc* CTest1View::GetDocument() // non-debug version is inline { ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CTest1Doc))); return (CTest1Doc*)m_pDocument; } #endif //_DEBUG ///////////////////////////////////////////////////////////////////////////// // CTest1View message handlers int CTest1View::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CView::OnCreate(lpCreateStruct) == -1) return -1; return 0; } //在此释放OpenGL使用的设备环境 void CTest1View::OnDestroy() { CView::OnDestroy(); HGLRC hrc; hrc = ::wglGetCurrentContext(); ::wglMakeCurrent(NULL, NULL); if (hrc) ::wglDeleteContext(hrc); } //设置视口 void CTest1View::OnSize(UINT nType, int cx, int cy) { CView::OnSize(nType, cx, cy); SetViewPort(cx,cy); } void CTest1View::SetViewPort(int cx, int cy) { this->m_xRect = cx; this->m_yRect = cy; //避免除数为0 if(m_yRect==0) m_yRect=1; glViewport(0,0,m_xRect,m_yRect); glMatrixMode(GL_PROJECTION); glLoadIdentity(); if(m_xRect>=m_yRect) { glOrtho(-20.0,20.0,-20.0*(GLfloat)m_yRect/(GLfloat)m_xRect, 20.0*(GLfloat)m_yRect/(GLfloat)m_xRect,-50.0,50.0); } else { glOrtho(-20.0*(GLfloat)m_xRect/(GLfloat)m_yRect,20.0*(GLfloat)m_xRect/(GLfloat)m_yRect,-20.0,20.0,-50.0,50.0); } glMatrixMode(GL_MODELVIEW); glLoadIdentity(); } //从文件中读取数据 bool CTest1View::GetFileData(CString filename) { ::gbIsGetData = true; ::gbDataIsEmpty = true; ::SendMessage(this->m_pFr->m_pCtrlWnd->m_hWnd,MESSAGE_DISABLEBTN,0,0); this->ZeroArray(); this->m_pFr->InvalidateAllWnd();//Invalidate(); FILE *stream; GLfloat Num; if( (stream = fopen( filename, "r+t" )) != NULL ) { int n = 0,m = 0; for (int i=0; i<ArrayOne; i++) { if (n == 0 || n == 200) { m ++; ::SendMessage(this->m_pFr->m_hWnd,MESSAGE_STEPPRO,m,0); n = 0; } n++; for(int j=0; j<ArrayTwo; j++) { fscanf(stream,"%f",&Num); Databuf[i][j]=Num; } } fclose( stream ); ::gbIsGetData = false; m_bGetFileSuccess = true; ::gbDataIsEmpty = false; ::SendMessage(this->m_pFr->m_pCtrlWnd->m_hWnd,MESSAGE_ENABLEBTN,0,0); ::SendMessage(this->m_pFr->m_pCtrlWnd->m_hWnd,MESSAGE_GETDATAFINISHED,0,0); } else m_bGetFileSuccess = false; return m_bGetFileSuccess; } //设置适于OpenGL使用的像素格式 bool CTest1View::bSetPixelFormat() { //定义一种像素格式 static PIXELFORMATDESCRIPTOR pfd = { sizeof(PIXELFORMATDESCRIPTOR), // size of this pfd 1, // version number PFD_DRAW_TO_WINDOW |// support window PFD_SUPPORT_OPENGL | // support OpenGL 支持OpenGL PFD_DOUBLEBUFFER, // double buffered 支持又缓冲 PFD_TYPE_RGBA, // RGBA type使用RGBA模式，不用调色板 24, // 24-bit color depth 使用24位真彩色 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 32位Z轴缓冲 0, // no stencil buffer 0, // no auxiliary buffer PFD_MAIN_PLANE, // main layer 0, // reserved 0, 0, 0 // layer masks ignored }; int pixelformat; //如果可以得到指定的 if ( (pixelformat = ChoosePixelFormat(m_pDC->GetSafeHdc(), &pfd)) == FALSE ) { AfxMessageBox("ChoosePixelFormat failed"); return false; } //用上面取到的格式设置设备环境 if (SetPixelFormat(m_pDC->GetSafeHdc(), pixelformat, &pfd) == FALSE) { AfxMessageBox("SetPixelFormat failed"); return false; } return true; } //初始化OpenGL环境 void CTest1View::IniOpenGL() { m_pDC = new CClientDC(this); PIXELFORMATDESCRIPTOR pfd; int n; //定义一个绘制上下文的句柄 HGLRC hrc; //初始化过程中主要就是初始化了一个客户区的设备环境指针 ASSERT(m_pDC != NULL); //建立应用所需的像素格式，并与当前设备上下文相关连 if (!bSetPixelFormat()) return; //得到指定设备环境的象素模式索引 n = ::GetPixelFormat(m_pDC->GetSafeHdc()); //根据上面得到的索引值来声明一个象素模式 ::DescribePixelFormat(m_pDC->GetSafeHdc(), n, sizeof(pfd), &pfd); //创建一个上下文设备环境 hrc = wglCreateContext(m_pDC->GetSafeHdc()); //将刚生成的设备上下文指针设为当前环境 wglMakeCurrent(m_pDC->GetSafeHdc(), hrc); //置黑背景 glClearColor(0.0,0.0,0.0,0.0); glCle