圖形學(xué)實(shí)驗(yàn)四-Sutherland-Hodgman多邊形裁剪算法實(shí)驗(yàn)報(bào)告

1、計(jì)算機(jī)圖形學(xué)實(shí)驗(yàn)報(bào)告裁剪算法實(shí)驗(yàn)姓名 閆學(xué)森 學(xué)號(hào) 專(zhuān)業(yè) 計(jì)算機(jī) 班級(jí) 3班 天津大學(xué)計(jì)算機(jī)科學(xué)與技術(shù)學(xué)院2015年 12 月 1日一、實(shí)驗(yàn)?zāi)康膶?shí)現(xiàn)Sutherland-Hodgman多邊形裁剪算法二、實(shí)驗(yàn)內(nèi)容自定義裁剪窗口和待裁剪直線(xiàn)段(或多邊形)，采用不同顏色突出顯示裁剪結(jié)果三、實(shí)驗(yàn)結(jié)果四、實(shí)驗(yàn)分析和總結(jié)Sutherland-Hodgman多邊形裁剪算法是將原多邊形進(jìn)行左右下上四次裁剪。其中進(jìn)行兩次分解 第一次分解：將多邊形關(guān)于矩形窗口的裁剪分解為它關(guān)于窗口四條邊所在直線(xiàn)的裁剪； 第二次分解：將多邊形關(guān)于一條直線(xiàn)的裁剪分解為多邊形各邊關(guān)于該直線(xiàn)的裁剪。四次裁剪相似，只要修改部分變量即可。但

2、是第一次修改時(shí)沒(méi)有完全改掉，出來(lái)的圖像不正確。通過(guò)這次試驗(yàn)使我了解到如何運(yùn)用計(jì)算機(jī)程序?qū)Υ翱谶M(jìn)行剪裁，了解到編碼剪裁算法直觀方便，速度較快，中點(diǎn)分割剪裁算法不用進(jìn)行乘除運(yùn)算，剪裁效率高, Sutherland-Hodgman直線(xiàn)裁剪算法更快。五、源代碼/ PolygonClipDemo.cpp : Defines the class behaviors for the application./#include stdafx.h#include PolygonClipDemo.h#include MainFrm.h#ifdef _DEBUG#define new DEBUG_NEW#endif

3、/ CPolygonClipDemoAppBEGIN_MESSAGE_MAP(CPolygonClipDemoApp, CWinApp)ON_COMMAND(ID_APP_ABOUT, OnAppAbout)END_MESSAGE_MAP()/ CPolygonClipDemoApp constructionCPolygonClipDemoApp:CPolygonClipDemoApp()/ TODO: add construction code here,/ Place all significant initialization in InitInstance/ The one and o

4、nly CPolygonClipDemoApp objectCPolygonClipDemoApp theApp;/ CPolygonClipDemoApp initializationBOOL CPolygonClipDemoApp:InitInstance()/ InitCommonControls() is required on Windows XP if an application/ manifest specifies use of ComCtl32.dll version 6 or later to enable/ visual styles. Otherwise, any w

5、indow creation will fail.InitCommonControls();CWinApp:InitInstance();/ Standard initialization/ If you are not using these features and wish to reduce the size/ of your final executable, you should remove from the following/ the specific initialization routines you do not need/ Change the registry k

6、ey under which our settings are stored/ TODO: You should modify this string to be something appropriate/ such as the name of your company or organizationSetRegistryKey(_T(Local AppWizard-Generated Applications);/ To create the main window, this code creates a new frame window/ object and then sets i

7、t as the applications main window objectCMainFrame* pFrame = new CMainFrame;m_pMainWnd = pFrame;/ create and load the frame with its resourcespFrame-LoadFrame(IDR_MAINFRAME,WS_OVERLAPPEDWINDOW | FWS_ADDTOTITLE, NULL,NULL);/ The one and only window has been initialized, so show and update itpFrame-Sh

8、owWindow(SW_SHOW);pFrame-UpdateWindow();/ call DragAcceptFiles only if theres a suffix/ In an SDI app, this should occur after ProcessShellCommandreturn TRUE;/ CPolygonClipDemoApp message handlers/ CAboutDlg dialog used for App Aboutclass CAboutDlg : public CDialogpublic:CAboutDlg();/ Dialog Dataenu

9、m IDD = IDD_ABOUTBOX ;protected:virtual void DoDataExchange(CDataExchange* pDX); / DDX/DDV support/ Implementationprotected:DECLARE_MESSAGE_MAP();CAboutDlg:CAboutDlg() : CDialog(CAboutDlg:IDD)void CAboutDlg:DoDataExchange(CDataExchange* pDX)CDialog:DoDataExchange(pDX);BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)END_MESSAGE_MAP()/