Tree.rar_OpenGL_Visual_C++_

// RenderView.cpp // Created : 08/11/2001 // Modified: 08/11/2001 #include "stdafx.h" #include "3DTree.h" #include <math.h> #include "3DTreeDoc.h" #include "RenderView.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif extern CString m_gstrHomeDir; // CRenderView IMPLEMENT_DYNCREATE(CRenderView, CView) BEGIN_MESSAGE_MAP(CRenderView, CView) //{{AFX_MSG_MAP(CRenderView) ON_WM_DESTROY() ON_WM_SIZE() ON_WM_LBUTTONDOWN() ON_WM_LBUTTONUP() ON_WM_MOUSEMOVE() ON_WM_PAINT() ON_WM_TIMER() 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() // CRenderView构造函数/destruction CRenderView::CRenderView() { // OpenGL绘制描述表及像素格式 m_hGLContext = NULL; m_GLPixelIndex = 0; //鼠标状态 m_LeftButtonDown = FALSE; m_RightButtonDown = FALSE; m_CursorRotation = AfxGetApp()->LoadCursor(IDC_CURSOR_ROTATION); // OpenGL初始化 C3DTreeApp *pApp = (C3DTreeApp *)AfxGetApp(); InitGeometry(); } // CRenderView析构函数 CRenderView::~CRenderView() { } // 初始化一些全局变量 void CRenderView::InitGeometry(void) { m_xRotation = 0.0f; m_yRotation = 0.0f; m_xTranslation = 0.0f; m_yTranslation = 0.0f; m_zTranslation = -3.0f; m_xScaling = 0.5f; m_yScaling = 0.5f; m_zScaling = 0.5f; m_fTreeWidth= 0.8f; m_fTreeHeight=1.0f; m_fCenter[0]= 0; m_fCenter[1]= 0; m_fCenter[2]= 0; } BOOL CRenderView::PreCreateWindow(CREATESTRUCT& cs) { return CView::PreCreateWindow(cs); } void CRenderView::OnDraw(CDC* pDC) { C3DTreeDoc *pDoc = GetDocument(); ASSERT(pDoc); } // CRenderView打印 BOOL CRenderView::OnPreparePrinting(CPrintInfo* pInfo) { return DoPreparePrinting(pInfo); } // 开始打印 void CRenderView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { } // 结束打印 void CRenderView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { } // CRenderView诊断 #ifdef _DEBUG void CRenderView::AssertValid() const { CView::AssertValid(); } void CRenderView::Dump(CDumpContext& dc) const { CView::Dump(dc); } C3DTreeDoc* CRenderView::GetDocument() // non-debug version is inline { ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(C3DTreeDoc))); return (C3DTreeDoc*)m_pDocument; } #endif //_DEBUG // 类的创建函数 // 可以在其中创建OpenGL的绘制描述表 int CRenderView::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CView::OnCreate(lpCreateStruct) == -1) return -1; HWND hWnd = GetSafeHwnd(); HDC hDC = ::GetDC(hWnd); if(SetWindowPixelFormat(hDC)==FALSE) return 0; if(CreateViewGLContext(hDC)==FALSE) return 0; // 设置多边形绘制的缺省模式 glPolygonMode(GL_FRONT_AND_BACK,GL_FILL); glShadeModel(GL_FLAT); glEnable(GL_NORMALIZE); // 设置光照及材质的属性 GLfloat ambientProperties[] = {1.0f, 1.0f, 0.0f, 1.0f}; GLfloat diffuseProperties[] = {0.5f, 0.5f, 0.5f, 1.0f}; GLfloat specularProperties[] = {0.0f, 1.0f, 0.0f, 1.0f}; GLfloat lightPos[] = {0.0f, -10.0f, 0.0f,1.0f}; glClearDepth( 1.0f ); m_ClearColorRed=1.0f; m_ClearColorGreen=1.0f; m_ClearColorBlue=1.0f; glLightfv( GL_LIGHT0, GL_AMBIENT, ambientProperties); glLightfv( GL_LIGHT0, GL_DIFFUSE, diffuseProperties); glLightfv( GL_LIGHT0, GL_SPECULAR, specularProperties); glLightfv( GL_LIGHT0, GL_POSITION,lightPos); glLightModelf(GL_LIGHT_MODEL_TWO_SIDE, 1.0f); // 缺省情况下加光照 glEnable(GL_LIGHT0); glEnable(GL_LIGHTING); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glClearColor(m_ClearColorRed,m_ClearColorGreen,m_ClearColorBlue,1.0f); // 设置定时器为0.1秒 SetTimer( 0, 100, NULL); return 0; } // 设置窗口的象素格式 BOOL CRenderView::SetWindowPixelFormat(HDC hDC) { PIXELFORMATDESCRIPTOR pixelDesc; pixelDesc.nSize = sizeof(PIXELFORMATDESCRIPTOR); pixelDesc.nVersion = 1; pixelDesc.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_STEREO_DONTCARE; pixelDesc.iPixelType = PFD_TYPE_RGBA; pixelDesc.cColorBits = 32; pixelDesc.cRedBits = 8; pixelDesc.cRedShift = 16; pixelDesc.cGreenBits = 8; pixelDesc.cGreenShift = 8; pixelDesc.cBlueBits = 8; pixelDesc.cBlueShift = 0; pixelDesc.cAlphaBits = 0; pixelDesc.cAlphaShift = 0; pixelDesc.cAccumBits = 64; pixelDesc.cAccumRedBits = 16; pixelDesc.cAccumGreenBits = 16; pixelDesc.cAccumBlueBits = 16; pixelDesc.cAccumAlphaBits = 0; pixelDesc.cDepthBits = 32; pixelDesc.cStencilBits = 8; pixelDesc.cAuxBuffers = 0; pixelDesc.iLayerType = PFD_MAIN_PLANE; pixelDesc.bReserved = 0; pixelDesc.dwLayerMask = 0; pixelDesc.dwVisibleMask = 0; pixelDesc.dwDamageMask = 0; m_GLPixelIndex = ChoosePixelFormat(hDC,&pixelDesc); if(m_GLPixelIndex == 0) // Choose default { m_GLPixelIndex = 1; if(DescribePixelFormat(hDC,m_GLPixelIndex, sizeof(PIXELFORMATDESCRIPTOR),&pixelDesc)==0) return FALSE; } if(!SetPixelFormat(hDC,m_GLPixelIndex,&pixelDesc)) return FALSE; return TRUE; } // 创建一个OpenGL绘制描述表 BOOL CRenderView::CreateViewGLContext(HDC hDC) { m_hGLContext = wglCreateContext(hDC); if(m_hGLContext==NULL) return FALSE; if(wglMakeCurrent(hDC,m_hGLContext)==FALSE) return FALSE; return TRUE; } // 清除所有OpenGL绘制描述表 // 销毁函数 void CRenderView::OnDestroy() { if(wglGetCurrentContext() != NULL) wglMakeCurrent(NULL,NULL); if(m_hGLContext != NULL) { wglDeleteContext(m_hGLContext); m_hGLContext = NULL; } CView::OnDestroy(); } // 窗口大小变化响应函数 void CRenderView::OnSize(UINT nType, int cx, int cy) { CView::OnSize(nType, cx, cy); // 设置OpenGL投影、视口和矩阵模式 CSize size(cx,cy); if(cy>0) aspect_ratio = (GLdouble)cx/(GLdouble)cy; else aspect_ratio = 1.0; glViewport(0,0,size.cx,size.cy); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(60.0, aspect_ratio, 1.0f, 128.0); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glDrawBuffer(GL_BACK); glEnable(GL_DEPTH_TEST); } void CRenderView::OnLButtonDown(UINT nFlags, CPoint point) { m_LeftButtonDown = TRUE; m_LeftDownPos = point; CView::OnLButtonDown(nFlags, point); } void CRenderView::OnLButtonUp(UINT nFlags, CPoint point) { m_LeftButtonDown = FALSE; CView::OnLButtonUp(nFlags, point); } void CRenderView::OnMouseMove(UINT nFlags, CPoint point) { if(m_LeftButtonDown) { m_xRotation += (float)(point.y - m_LeftDownPos.y) / 3.0f; m_yRotation += (float)(point.x - m_LeftDownPos.x) / 3.0f; m_LeftDownPos = point; InvalidateRect(NULL,FALSE); } CView::OnMouseMove(nFlags, point); } // 绘制函数 void CRenderView::OnPaint() { // 用于绘制的设备描述表 CPaintDC dc(this); // Useful in singledoc templates HWND hWnd = GetSafeHwnd(); HDC hDC = ::GetDC(hWnd); wglMakeCurrent(hDC,m_hGLContext); DrawWithOpenGL(); // 使用双缓存 SwapBuffers(hDC); //dc.m_ps.hdc } // 用定时器实现一段简单的动画，每帧绕X轴、Y轴分别旋转1.0度 void CRenderView::OnTimer(UINT nIDEvent) { switch(nIDEvent) { case 0: break; case 1: m_xRotation+=1.0f; m_yRotation+=1.0f; InvalidateRect(NULL,FALSE); break; default: {} } } void CRenderView::DrawWithOpenGL() { // 清除背景 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glClearColor(m_ClearColorRed,m_ClearColorGreen,m_ClearColorBlue,1.0f); glPushMatrix(); // 缩放、平移、旋转变换 glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glScalef(m_xScaling,m_yScaling,m_zScaling); glTranslatef(m_xTranslation,m_yTranslation,m_zTranslation); glRotatef(m_xRotation,1.0f,0.0f,0.0f); glRotatef(m_yRotation,0.0f,1.0f,0.0f); glRotatef(-90,1.0f,0.0f,0.0f); //第一排树 glPushMatrix(); glTranslatef(0.0f,0.0f,0.2f); LoadTextureImage(m_gstrHomeDir+"TreeImage\