画立方体——计算机图形学实验.doc

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广西师范大学计算机科学与信息工程学院 08计应晓晓版计算机图形学实验——画立方体（通过视向变换等）具体实现如下（仅供参考）一、添加一个头文件Data.h Data文件包含立方体数据：具体代码： double Vertex[8][3]={ {0,20,0},{30,20,0},{30,20,15},{0,20,15}, {0,0,0},{30,0,0},{30,0,15},{0,0,15}}; int Edge[12][2]={ {0,1},{1,2},{2,3},{3,0}, {4,5},{5,6},{6,7},{7,4}, {0,4},{1,5},{2,6},{3,7}}; double Vertex1[8][3]; //视点 double Eye[3]={20.0f,30.0f,56.1f}; //窗口数据 //int Window[4]={-30,5,-15,3}; int Window[4]={-20,-15,-2,-20}; //视区数据 int ViewPort[4]={200,250,180,15}; 二、View类头文件 6_Draw cubeView.h // 6_Draw cubeView.h : interface of the CMy6_DrawcubeView class // ///////////////////////////////////////////////////////////////////////////// #if !defined(AFX_6_DRAWCUBEVIEW_H__940E4DA8_261A_46F3_82C2_259B9B805817__INCLUDED_) #define AFX_6_DRAWCUBEVIEW_H__940E4DA8_261A_46F3_82C2_259B9B805817__INCLUDED_ #if _MSC_VER > 1000 #pragma once #endif // _MSC_VER > 1000 class CMy6_DrawcubeView : public CView { protected: // create from serialization only CMy6_DrawcubeView(); DECLARE_DYNCREATE(CMy6_DrawcubeView) // Attributes public: CMy6_DrawcubeDoc* GetDocument(); bool draw; void drawCube(); // Operations public: // Overrides // ClassWizard generated virtual function overrides //{{AFX_VIRTUAL(CMy6_DrawcubeView) public: virtual void OnDraw(CDC* pDC); // overridden to draw this view virtual BOOL PreCreateWindow(CREATESTRUCT& cs); protected: virtual BOOL OnPreparePrinting(CPrintInfo* pInfo); virtual void OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo); virtual void OnEndPrinting(CDC* pDC, CPrintInfo* pInfo); //}}AFX_VIRTUAL // Implementation public: virtual ~CMy6_DrawcubeView(); #ifdef _DEBUG virtual void AssertValid() const; virtual void Dump(CDumpContext& dc) const; #endif protected: // Generated message map functions protected: //{{AFX_MSG(CMy6_DrawcubeView) afx_msg void Ondrawcube(); afx_msg void OnUpdatedrawcube(CCmdUI* pCmdUI); //}}AFX_MSG DECLARE_MESSAGE_MAP() }; #ifndef _DEBUG // debug version in 6_Draw cubeView.cpp inline CMy6_DrawcubeDoc* CMy6_DrawcubeView::GetDocument() { return (CMy6_DrawcubeDoc*)m_pDocument; } #endif ///////////////////////////////////////////////////////////////////////////// //{{AFX_INSERT_LOCATION}} // Microsoft Visual C++ will insert additional declarations immediately before the previous line. #endif // !defined(AFX_6_DRAWCUBEVIEW_H__940E4DA8_261A_46F3_82C2_259B9B805817__INCLUDED_) 三、View 类实现代码： 6_Draw cubeView.cpp 代码： // 6_Draw cubeView.cpp : implementation of the CMy6_DrawcubeView class // #include "stdafx.h" #include "6_Draw cube.h" #include "data.h" #include <math.h> #include "6_Draw cubeDoc.h" #include "6_Draw cubeView.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CMy6_DrawcubeView IMPLEMENT_DYNCREATE(CMy6_DrawcubeView, CView) BEGIN_MESSAGE_MAP(CMy6_DrawcubeView, CView) //{{AFX_MSG_MAP(CMy6_DrawcubeView) ON_COMMAND(drawcube, Ondrawcube) ON_UPDATE_COMMAND_UI(drawcube, OnUpdatedrawcube) //}}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() ///////////////////////////////////////////////////////////////////////////// // CMy6_DrawcubeView construction/destruction CMy6_DrawcubeView::CMy6_DrawcubeView() { // TODO: add construction code here draw=true; } CMy6_DrawcubeView::~CMy6_DrawcubeView() { } BOOL CMy6_DrawcubeView::PreCreateWindow(CREATESTRUCT& cs) { // TODO: Modify the Window class or styles here by modifying // the CREATESTRUCT cs return CView::PreCreateWindow(cs); } ///////////////////////////////////////////////////////////////////////////// // CMy6_DrawcubeView drawing void CMy6_DrawcubeView::OnDraw(CDC* pDC) { CMy6_DrawcubeDoc* pDoc = GetDocument(); ASSERT_VALID(pDoc); CClientDC dc(this); dc.TextOut(10,10,"计算计图形学作业六：画立方体"); dc.TextOut(10,30,"姓名：晓晓"); dc.TextOut(10,50,"学号：200812301004"); if(draw) { //dc.TextOut(100,100,"fdsfsdf"); drawCube(); } // TODO: add draw code for native data here } ///////////////////////////////////////////////////////////////////////////// // CMy6_DrawcubeView printing BOOL CMy6_DrawcubeView::OnPreparePrinting(CPrintInfo* pInfo) { // default preparation return DoPreparePrinting(pInfo); } void CMy6_DrawcubeView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add extra initialization before printing } void CMy6_DrawcubeView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add cleanup after printing } ///////////////////////////////////////////////////////////////////////////// // CMy6_DrawcubeView diagnostics #ifdef _DEBUG void CMy6_DrawcubeView::AssertValid() const { CView::AssertValid(); } void CMy6_DrawcubeView::Dump(CDumpContext& dc) const { CView::Dump(dc); } CMy6_DrawcubeDoc* CMy6_DrawcubeView::GetDocument() // non-debug version is inline { ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CMy6_DrawcubeDoc))); return (CMy6_DrawcubeDoc*)m_pDocument; } #endif //_DEBUG ///////////////////////////////////////////////////////////////////////////// // CMy6_DrawcubeView message handlers void CMy6_DrawcubeView::Ondrawcube() { // TODO: Add your command handler code here draw=!draw; CMy6_DrawcubeDoc* pDoc = GetDocument(); ASSERT_VALID(pDoc); pDoc->UpdateAllViews(NULL); } void CMy6_DrawcubeView::OnUpdatedrawcube(CCmdUI* pCmdUI) { // TODO: Add your command update UI handler code here if(draw) { pCmdUI->SetCheck(1); } else {pCmdUI->SetCheck(0);} } void CMy6_DrawcubeView::drawCube() { //读入模型 //定义视点 //视向变换 double V[8][3]; int i; double a=sqrt(Eye[0]*Eye[0]+Eye[1]*Eye[1]), b=sqrt(Eye[0]*Eye[0]+Eye[1]*Eye[1]+Eye[2]*Eye[2]); for(i=0;i<8;i++) { V[i][0]= Vertex[i][0]*(-Eye[1]/a) + Vertex[i][1]*(Eye[0]/a) ; V[i][1]= Vertex[i][0]*(-Eye[0]*Eye[2]/(a*b)) + Vertex[i][1]*(Eye[1]*Eye[2]/(a*b)) + Vertex[i][2]*a/b; V[i][2]= Vertex[i][0]*(-Eye[0]/b) + Vertex[i][1]*(-Eye[1]/b) + Vertex[i][2]*(-Eye[2]/b); } //投影到XY平面 //窗口视区变换 double a1=(ViewPort[1]-ViewPort[0])/(Window[1]-Window[0]); double b1=ViewPort[0]-a1*Window[0]; double c1=(ViewPort[3]-ViewPort[2])/(Window[3]-Window[2]); double d1=ViewPort[2]-c1*Window[2]; for(i=0;i<8;i++) { V[i][0]=a1*V[i][0]+b1; V[i][1]=c1*V[i][1]+d1; } //画出投影图 CClientDC dc(this); for(i=0;i<12;i++) { dc.MoveTo((int)V[Edge[i][0]][0],(int)V[Edge[i][0]][1]); dc.LineTo((int)V[Edge[i][1]][0],(int)V[Edge[i][1]][1]); } } 三、效果图

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