实验1：Bresenham算法资料

//eView.cpp:implementationoftheCEViewclass//#include"stdafx.h"#include"e.h"#include"eDoc.h"#include"eView.h"#ifdef_DEBUG#definenewDEBUG_NEW#undefTHIS_FILEstaticcharTHIS_FILE[]=__FILE__;#endif///////////////////////////////////////////////////////////////////////////////CEViewIMPLEMENT_DYNCREATE(CEView,CView)BEGIN_MESSAGE_MAP(CEView,CView) //{{AFX_MSG_MAP(CEView) //NOTE-theClassWizardwilladdandremovemappingmacroshere. //DONOTEDITwhatyouseeintheseblocksofgeneratedcode! //}}AFX_MSG_MAP //Standardprintingcommands 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()///////////////////////////////////////////////////////////////////////////////CEViewconstruction/destructionCEView::CEView(){ //TODO:addconstructioncodehere}CEView::~CEView(){}BOOLCEView::PreCreateWindow(CREATESTRUCT&cs){ //TODO:ModifytheWindowclassorstylesherebymodifying //theCREATESTRUCTcs returnCView::PreCreateWindow(cs);}///////////////////////////////////////////////////////////////////////////////CEViewdrawingvoidBresenhamline(intx1,inty1,intx2,inty2,CDC*pDC){//对于所有直线均按照从左至右的方向绘制 intx,y,dy,dx,right,rightleft,d; if(x1>x2){ inttempx,tempy; tempx=x1;x1=x2;x2=tempx; tempy=y1;y1=y2;y2=tempy; } //根据斜率的情况不同而绘制 if(y1==y2){//斜率为0的情况 for(x=x1;x<=x2;x++) pDC->SetPixel(x,y1,2); } elseif(x1==x2){//直线为垂直的情况 if(y1>y2){//使直线按从下往上画 inttempy=y1; y1=y2;y2=tempy; } for(y=y1;y<=y2;y++) pDC->SetPixel(x1,y,2); } else{ dy=y2-y1; dx=x2-x1; if(abs(dy)==abs(dx)){////斜率为1或-1时 x=x1;y=y1; if(dy<0){//