计算机图形学DDA算法程序代码

1、/ Experiment_Frame_OneView.cpp : implementation of the CExperiment_Frame_OneView class/#include stdafx.h#include Experiment_Frame_One.h#include Experiment_Frame_OneDoc.h#include Experiment_Frame_OneView.h#include SettingDlg.h#include InputDialog.h#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEsta

2、tic char THIS_FILE = _FILE_;#endif/ CExperiment_Frame_OneViewIMPLEMENT_DYNCREATE(CExperiment_Frame_OneView, CView)BEGIN_MESSAGE_MAP(CExperiment_Frame_OneView, CView)/AFX_MSG_MAP(CExperiment_Frame_OneView)ON_COMMAND(IDM_SETTING, OnSetting)ON_COMMAND(IDM_INPUT, OnInput)/AFX_MSG_MAP/ Standard printing

3、commandsON_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()/ CExperiment_Frame_OneView construction/destructionCExperiment_Frame_OneView:CExperiment_Frame_OneView()/ TODO: add cons

4、truction code herem_bGridOn = true;m_iMarginSize = 20;m_iPointSize = 20;m_iActive_Algorithm = 0;m_PointColor = RGB(255, 0, 0); X0 = Y0 = 0; X1 = Y1 = 10;CExperiment_Frame_OneView:CExperiment_Frame_OneView()BOOL CExperiment_Frame_OneView:PreCreateWindow(CREATESTRUCT& cs)/ TODO: Modify the Window clas

5、s or styles here by modifying/ the CREATESTRUCT csreturn CView:PreCreateWindow(cs);/ CExperiment_Frame_OneView drawingvoid CExperiment_Frame_OneView:OnDraw(CDC* pDC)CExperiment_Frame_OneDoc* pDoc = GetDocument();ASSERT_VALID(pDoc);/ TODO: add draw code for native data hereif( this-m_bGridOn )this-Dr

6、awGrid(pDC);switch( this-m_iActive_Algorithm) case 0: /DDADDA(X0,Y0,X1,Y1);break;case 1: /Mid_BresenhamMid_Bresenham(X0,Y0,X1,Y1);break;default:break;CView:OnDraw(pDC);/ CExperiment_Frame_OneView printingBOOL CExperiment_Frame_OneView:OnPreparePrinting(CPrintInfo* pInfo)/ default preparationreturn D

7、oPreparePrinting(pInfo);void CExperiment_Frame_OneView:OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)/ TODO: add extra initialization before printingvoid CExperiment_Frame_OneView:OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)/ TODO: add cleanup after printing/ CExperiment_Frame_OneView di

8、agnostics#ifdef _DEBUGvoid CExperiment_Frame_OneView:AssertValid() constCView:AssertValid();void CExperiment_Frame_OneView:Dump(CDumpContext& dc) constCView:Dump(dc);CExperiment_Frame_OneDoc* CExperiment_Frame_OneView:GetDocument() / non-debug version is inlineASSERT(m_pDocument-IsKindOf(RUNTIME_CLA

9、SS(CExperiment_Frame_OneDoc);return (CExperiment_Frame_OneDoc*)m_pDocument;#endif /_DEBUG/ CExperiment_Frame_OneView message handlersvoid CExperiment_Frame_OneView:DrawGrid(CDC *pDC)CRect ClientRect;GetClientRect( &ClientRect );CPen *pNewPen = new CPen;pNewPen-CreatePen(PS_DOT, 1, RGB(256,0,0);CPen

10、*pOldPen = pDC-SelectObject(pNewPen);int x0 = ClientRect.left + m_iMarginSize; int x1 = x0 + (ClientRect.right -ClientRect.left - 2*m_iMarginSize)/m_iPointSize * m_iPointSize;int y0 = ClientRect.bottom - m_iMarginSize;int y1 = y0 - (ClientRect.bottom - ClientRect.top - 2*m_iMarginSize)/m_iPointSize

11、* m_iPointSize;int x, y;/Draw horizontal linesfor ( y = y0; y = y1; y -= m_iPointSize)pDC-MoveTo(x0, y);pDC-LineTo(x1, y);/Draw vertical linesfor ( x = x0; x MoveTo(x, y0);pDC-LineTo(x, y1);pDC-SelectObject(pOldPen);pNewPen-DeleteObject();return;void CExperiment_Frame_OneView:DrawPixel(int X, int Y)

12、CDC *pDC= GetDC();CBrush *pNewBrush = new CBrush;pNewBrush-CreateSolidBrush(m_PointColor);CBrush *pOldBrush = pDC-SelectObject(pNewBrush);CPen *pNewPen = new CPen;pNewPen-CreatePen(PS_NULL, 1, RGB(0,0,0);CPen *pOldPen = pDC-SelectObject(pNewPen);CRect ClientRect;GetClientRect( &ClientRect );int x0 =

13、 ClientRect.left + m_iMarginSize; int y0 = ClientRect.bottom - m_iMarginSize;CRect Point;Point.left = x0 + X*m_iPointSize;Point.right = Point.left + m_iPointSize;Point.bottom = y0 - Y*m_iPointSize;Point.top = Point.bottom - m_iPointSize;pDC-Rectangle(&Point);pDC-SelectObject(pOldBrush);pNewBrush-Del

14、eteObject();pDC-SelectObject(pOldPen);pOldPen-DeleteObject();void CExperiment_Frame_OneView:OnSetting() CSettingDlg SettingDialog(m_iPointSize, m_PointColor, m_iActive_Algorithm, m_bGridOn );if ( SettingDialog.DoModal() = IDOK )this-m_bGridOn = SettingDialog.m_bGridOn;this-m_PointColor = SettingDial

15、og.m_Point_Color;this-m_iPointSize = SettingDialog.m_Point_Size;this-m_iActive_Algorithm = SettingDialog.m_iActive_Algorithm;this-Invalidate();void CExperiment_Frame_OneView:OnInput() CInputDialog InputDialog(X0, Y0, X1, Y1);if ( InputDialog.DoModal() = IDOK)X0 = InputDialog.m_X0;X1 = InputDialog.m_X1;Y0 = InputDialog.m_Y0;Y1 = InputDialog.m_Y1;Invalidate();/-算法实现-/绘制像素的函数DrawPixel(x, y);void CExperiment_Frame_OneView:DDA(int X0, int Y0, int X1, int Y1)int dx,dy,epsl,k;float x,y,xIncre,yIncre;dx=X1-X0; dy=Y1-Y0;x=X0; y=Y0;if(abs(dx)abs(dy) epsl=abs(dx);else epsl=a