2007级计算机图形学课程设计(4)

●TestView.cpp

// TestView.cpp : implementation of the CTestView class //

#include \#include \

#include \#include \

#define ROUND(a) int(a+0.5) //四舍五入 #ifdef _DEBUG

#define new DEBUG_NEW #undef THIS_FILE

static char THIS_FILE[] = __FILE__; #endif

///////////////////////////////////////////////////////////////////////////// // CTestView

IMPLEMENT_DYNCREATE(CTestView, CView)

BEGIN_MESSAGE_MAP(CTestView, CView) //{{AFX_MSG_MAP(CTestView)

ON_COMMAND(ID_MENUMbline, OnMENUMbline) ON_COMMAND(ID_MENUMbcircle, OnMENUMbcircle) //}}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()

///////////////////////////////////////////////////////////////////////////// // CTestView construction/destruction

CTestView::CTestView() {

// TODO: add construction code here }

CTestView::~CTestView() {

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}

BOOL CTestView::PreCreateWindow(CREATESTRUCT& cs) {

// TODO: Modify the Window class or styles here by modifying // the CREATESTRUCT cs

return CView::PreCreateWindow(cs); }

///////////////////////////////////////////////////////////////////////////// // CTestView drawing

void CTestView::OnDraw(CDC* pDC) {

CTestDoc* pDoc = GetDocument(); ASSERT_VALID(pDoc);

// TODO: add draw code for native data here }

///////////////////////////////////////////////////////////////////////////// // CTestView printing

BOOL CTestView::OnPreparePrinting(CPrintInfo* pInfo) {

// default preparation

return DoPreparePrinting(pInfo); }

void CTestView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) {

// TODO: add extra initialization before printing }

void CTestView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) {

// TODO: add cleanup after printing }

///////////////////////////////////////////////////////////////////////////// // CTestView diagnostics

#ifdef _DEBUG

void CTestView::AssertValid() const

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{

CView::AssertValid(); }

void CTestView::Dump(CDumpContext& dc) const {

CView::Dump(dc); }

CTestDoc* CTestView::GetDocument() // non-debug version is inline {

ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CTestDoc))); return (CTestDoc*)m_pDocument; }

#endif //_DEBUG

///////////////////////////////////////////////////////////////////////////// // CTestView message handlers

void CTestView::Mbline()//Bresenham函数 {

CClientDC dc(this);

COLORREF rgb=RGB(0,0,255);//定义直线颜色为蓝色 double x,y,d,k;

x=x0;y=y0;k=(y1-y0)/(x1-x0);d=0.5-k; //定义x，y，k及d的初始值 for(x=x0;x<=x1;x++) { dc.SetPixel(ROUND(x),ROUND(y),rgb); if(d<0) { y++;

d+=1-k;//d<0时，取右上方像素点，d的增量为1-k } else

d-=k;//d>=0时，取正右方向像素点，d的增量为-k } }

void CTestView::OnMENUMbline()//菜单函数 {

// TODO: Add your command handler code here InputDlg dlg;

if(dlg.DoModal()==IDOK) { x0=dlg.m_x0;//变量x0即为InputDlg中的m_x0

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y0=dlg.m_y0;//变量y0即为InputDlg中的m_y0 x1=dlg.m_x1;//变量x1即为InputDlg中的m_x1 y1=dlg.m_y1;//变量y1即为InputDlg中的m_y1 }

AfxGetMainWnd()->SetWindowText(\实验:直线中点Bresenham算法\ RedrawWindow(); Mbline(); }

void CTestView::GetMaxX()//得到客户区的最大横坐标 {

CRect Rect;

GetClientRect(&Rect); MaxX=Rect.right; }

void CTestView::GetMaxY()//得到客户区最大纵坐标 {

CRect Rect;

GetClientRect(&Rect); MaxY=Rect.bottom; }

void CTestView::Mbcircle()//Bresenham算法 {

double x,y,d;

d=1.25-R;x=0;y=R; //定义d,x,y的初始值 for(x=0;x=0时，取右下方像素点，d的增量为2(x-y)+5 y--; } } }

void CTestView::CirclePoint(double x, double y)//八分法画圆子函数 {

CClientDC dc(this);

COLORREF rgb=RGB(0,0,255);//定义圆的颜色

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dc.SetPixel(ROUND(x)+MaxX/2,ROUND(y)+MaxY/2,rgb);//x,y dc.SetPixel(ROUND(y)+MaxX/2,ROUND(x)+MaxY/2,rgb);//y,x dc.SetPixel(ROUND(y)+MaxX/2,-ROUND(x)+MaxY/2,rgb);//y,-x dc.SetPixel(ROUND(x)+MaxX/2,-ROUND(y)+MaxY/2,rgb);//x,-y dc.SetPixel(-ROUND(x)+MaxX/2,-ROUND(y)+MaxY/2,rgb);//-x,-y dc.SetPixel(-ROUND(y)+MaxX/2,-ROUND(x)+MaxY/2,rgb);//-y,-x dc.SetPixel(-ROUND(y)+MaxX/2,ROUND(x)+MaxY/2,rgb);//-y,x dc.SetPixel(-ROUND(x)+MaxX/2,ROUND(y)+MaxY/2,rgb);//-x,y }

void CTestView::OnMENUMbcircle()//菜单函数 {

// TODO: Add your command handler code here InputDlg2 dlg;

if(dlg.DoModal()==IDOK) { R=dlg.m_r;//R即为InputDlg2中的圆的半径r }

AfxGetMainWnd()->SetWindowText(\实验：圆中点Bresenham算法\ RedrawWindow();

GetMaxX();GetMaxY(); Mbcircle(); }

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