直线的扫描转换

1、宁夏师范学院数学与计算机科学学院计算机图形学实验报告实验序号：2实验项目名称：直线的扫描转换3专业、班级实验地点指导教师时间2017-03-20、实验目的:学会使用MFC能够运用直线的三种扫描算法即数值微分算法（DDA算法）、中点 画线算法和Bresenham画线算法绘制直线，并熟悉掌握制作过程。二、实验环境:Win dows 7VC+ 6.0三、实验内容:打开VC6.0,点击新建一 工程一MFC AppWizard exe，创建项目名称（随便写），确定位置，然后点击确定。Files Prujccis | Warkspaccs | Other DucurnentsPrujcct uaiiic：

2、呻Location：赫 Create new works pace广 Md to Tu-rmit wiJiitkrp ，-cc 厂 rfprfiid-MCv Gif：CKCancel选择创建的应用类型一 单文档一 完成MFC AppWizard - Step 1ITnh Vi* *jjMpy Whal type of application would you like to create?Single documentMultiple documentsDialog basedDocument/View architecture suppoil?Whal language would you

3、 like your resources in?中文简体，中国1 (APPWZCHS.DLLlFinishCancel点击确定。Project Inforn dttoriUKAppWiTflrrI willa rtrw i-krlrtnn prAjm with ihr tnllnwiing nritientinni：DDA算法:添加成员函数:1.展开 wdx classes- 右击 CWdxView 选择 Add Member Funtion （添加成员函数） 函数类型定义为void，函数描述为：DDAline 点击确定2.展开 wdx classes-CWdxView 在 DDAline (

4、)函数里添加形参 int xO,int yO,int x1,i nt y1,i nt color,CCIie ntDC & de|cWibeViFiMF J| Allm* Hl Liu 阖 j * UDAJilic-圉 hfdx uldEErstf.宦li.F CboutDIq * * C MaEiiFrjiniti CWdKApp LWOkDOC* IV/dxViinw AbHcrtVdlHlU 律 CWIxVIewfl jeWdgewQ ainminuii nmTifiCniiirip .Grtn noj rn rnl|-OnBcqinninli OnDruwCDC* V* OnEndrt

5、lntin 沁 OnFcpflrel Vii HtcCmtcWin H _jG(uhalsuairt CunKtliu:pk片* dr) ranstCUM: ：I1UHpdc;CkdKifoc* CMMUlewiiGttDocuntnn) / non-debug ucrclon is InlineASSFRT(n pnnf：unnt- sHindDf (UUHF J MF Cl ASRUIxDnc ) j ); p-ptm-n 4CHriHD(n;*Jn_pPncunpnt;ftuHf ftfintff Uli ftnnniHfnfifttfnatff naif ftf nit fnnifHf

6、f CUdxLileu nesaaqe h刁ndLermuoid GiOxUleu： ：OlAilnc3.双击 CWdxView,在public中添加代码:* AuyHr(VullilJ 奔 CWdxVitwtj* CWdxVitwIl 中 nmAllnrpritxtl* DDAIIneO4 DumpCDump* GetDocumcntl A無 DnUeginPrinti4 DnUrBwfLLJL 玛 DnFndPrIinnnr X Oiirii；piircrii* iPittCirail；wilt 更 UGlobahvoid CWdxView:DDAIi ne(i nt x0,i nt yO

7、,i nt x1,i nt y1,i nt color,CClie ntDC & dc);记住最后加分号Bit _MSU_ULH luuaprdgi讣 unevIh-ndlr JfidJIFrt ? IPAfIpldss CUdMUieu ； pubLlu CUlukr卩rntiirtpd： / erpt*# fr&n E CLfifl E_O?HCn ErtTE (ClfdxillFu)f( PttrilHjtVE public;cifOKKrc GetDacunenru :Dpmrdtiuiu puhUr:untd Clflxiri PM： :pDAlinppnr x I9,int yOl

8、nt x1 ,i nt ,tnt colnr ,CClienrDC K He);/ OvurF丄df4.展开CWdxView 双击On Draw添加代码:CClie ntDC dc(this);DDAl in e(8,12,20,25,RGB(255,145,200),dc);三: CWdxView4 AsacrtValidQ 曲 CWdxViewO电 CV*dxVicwO* nDAIinpintxf t DDIincQ4 nurTipCniJin卩 电 etDuLuiiieiil| 騎 OnRegmPrinti|OriDraCD 伽 OnEndPrintirc 御 OnReparePrli

9、卩 recreate Wil I+ CjGlobalsCWriJf(JiPU：:rUrlKUiPuC )BOOL CWdKUiew: ;PreCr eDnc - CetOncunpntO: flSSERT_UftLlI(pDoc);CClientDC dc(this);/ TODl: add draw cade Mr natiue dat here5.双击DDAIine,在函数体内编写如下代码：并调试程序 void CWdxView:DDAIi ne(i nt x0,i nt yO,i nt x1, int y1,i nt color,CCIie ntDC & de)CPen new pen(

10、P S_SOLID,1,color);dc.SelectObject (&newpen);int x,dx,dy,y,k;dx=x1-x0;dy=y1-y0;k=dy/dx;y=y0;for(x=x0;xv=x1;x+)dc.Set Pixel(x,i nt(y+0.5),color);y=y+k;tlDOAJmrl.UuinpCUump GclOooumcnH 9* OnbcginRinti OnDrswICDC * 绐 OnEiidPrliillhLOBPiitptiicPrii PirrCrrfttrWiftI LJ GInb/ilsinifntfiifniin/fiffnfnfinff

11、Uin/tiiiniffiffjffi/Hi/fnfnffnftJfif ff ChltlxUleuf nessdQD luridLLr!uulil CUdxUiiPH： ：ODAlliiv(liiL xO,inLx1 ,iiit yllnt uulur ,CCllviit C 6i ilc)nPPd npwpHii(P_5ni TO, 1 ,rDi nr); dDSDiectab-lectfCJiewppn、； int K ,(lx,dlp,k;*=tlp/dx;VIFOI rnr)(*KB；K运行结果:文触戸髀旧W(V)驀閒H中点画线算法:添加成员函数1.展开 wdx classes- 右

12、击 CWdxView 选择 Add Member Funtion (添加成员函数) 函数类型定义为void，函数描述为：MidpointLine 点击确定2.展开 classes-CWdxview，在 MidpointLine 函数里添加形参 int xO,int yO,int x1,inty1,i nt color,CCIie ntDC & dc=CWdxVtew 4ueertValid) 沁 CWdxViewCt CWdxViErwO DDAIincpnt xU* DDAIineQ DiimpLCUump双击On Draw添加代码:Mid poi ntLin e(20,15,259,485

13、,RGB(80,120,255), dc);I QnDrawCDC 刁 OnEndPrintinc OnPreparePri*4 PreCfcateWin I Globals/ CUdKUievf drawinguoid CUdxUleu:OnDrau(CDC* pDC)ClIdxDoc* pDoc = EetD(icuiient(); ASSERI_UALTD(pDac):CClientDC dcAlineC8,12255盹).dc);MidpointLine(20,15,259,485,RGB(80,120,255) , dc) ;|双击MidpointLine，在函数体内编写如下代码：并

14、 调试程序CPen new pen(P S_SOLID,1,color);dc.SelectObject (&newpen);int a,b,delta1,delta2,d,x,y;a=y0-y1;b=x1-x0;d=2*a+b;delta1=2*a;delta2=2*(a+b);x=x0;y=y0;dc.Set Pi xel(x,y,color);while(xx1)if(d0)x+;y+;d+=delta2;elsex+;d+=delta2;dc.Set Pi xel(x,y,color);hdidpalnlLinBill* MidpointLincD 仞 OnQcyinPkiniit U

15、nDrawiCOC 背 OpEodPtinlinj % On Prep arePrii PncCrcalicWIri iGluttjilsheld CUJxUiett：:HidpolntliPeC ft dt)I鲨口CPm i|t*ipHniP5_$DI TD, Lcvlnr- de =2】FCt flhiJ*C I- ;iiit41 pdpH d? ,1/;N=卯一 y1;ii=3ti-)d n； d=2*J+b；dlLj2 = 2*(d+lt)；StJtd； 护艸； 4C.SttPlMl4 KltC010r); vniiF(xMi)iffdliuijr - 0 rrurCE, 0 vjrn

16、in右击 CWdxView 选择 Add Member Funtion,函数类型定义为 void，函数描述为：Bresenham_Line 点击确定Add MemberFunctionFunction Type： voidFunction Declaration：Breeenham Une|r Accessa PublicC ProtectedC Private厂 Stall c厂 Virtual2.点击 classes-CWdxview，在 Bresenham_Line函数里添加形参 int x0,int yO,int x1,inty1,i nt color,CCIie ntDC & dca

17、 CWdxView* AuterlVahda* Brc!innh*m_l CWftxViewff* CWdxViewfl* DDAIIne|infl xfl* DDAIincD* DunipICUurn p* GelDuuinieiiUvoid LinsOvoid CUdxUliEH：Bi-eenhC Ck dic; Cwaxuiew:：Bresennan_Linp(int xBant ywjnt kiyi,int color,CClieituC b dc;|4.展开CWdxView 双击On Draw添加代码:Brese nham_Li ne(65,12,600,450,RGB(20,180

18、,250), dc);OnDravCDC 喪 询 OnEndPrintirt 询 OnPreparePrii 4 PleCreateVZinI Globals)DC) uoid5.双击 Bresenham_Line在函数体内编写如下代码：并调试程序int x,y,dx,dy,e,i;dx=x1-x0;dy=y1-yO;e=-dx;x=xO;y=yO;for(i=0;iv=dx;i+)dc.Set Pi xel(x,y,color);x=x+1;e=e+2*dy;if(e=0)y=y+1;e=e-2*dx;ClfdxUieu: :OnDrau(CDC* pDC )CWdxDoc* pDoc -

19、GetDocu(ient(): ASSERT_UALID(pD0C5； CClientDC dcCthis)：DDAlineQ J2,2D,2F,nGB(25?,145,200),dc)；MidpaintLine(20,15,RCB(80,12 0,255 , de ):Bresenhain_Lin e( 65 ,12 ,QFtGB( 20,180,20 , de)诃血w|CLlLiWCiiEiidPrliilhii 筑 flnPrcpofcPrit rreCrrnteWin _J GIoUbIevoid CUdKVif II： ：ursMihan_Li int tid,int v,lnt ki Int 目 i,inc calnr ,CU11 pntDi; b de)int X沁和Oy理*1; (Jk 二 Kl-acfl; dy.y1-可tt;e-dx; jh-hO; 帖yo：de .3etPlxel(x，!