OpenGL计算机图形学梁友栋裁剪算法实验代码及运行结果

《计算机图形学实验》报告任课教师：钱文华2016年春季学期实验:梁友栋裁剪实验时间：2016年11月17日实验地点：信息学院2204实验目的：掌握梁友栋裁剪程序代码：#include<stdio.h>#include<glut.h>#include<stdlib.h>#include<math.h>classwcPt2D{public:GLfloatx,y;voidsetCoords(GLfloatxCoord,GLfloatyCoord){x=xCoord;y=yCoord;}GLfloatgetx()const{returnx;}GLfloatgety()const{returny;}};inlineGLintround(constGLfloata){returnGLint(a+0.5);}voidsetPixel(intx,inty){glBegin(GL_POINTS);glVertex2i(x,y);glEnd();voidinit(){glClearColor(1.0,1.0,1.0,0.0);glMatrixMode(GL_PROJECTION);gluOrtho2D(-200.0,200.0,-200.0,200.0);}voidlineBres(GLfloatx0,GLfloaty0,GLfloatxEnd,GLfloatyEnd){intdx=fabs(xEnd-x0),dy=fabs(yEnd-y0);intp=2*dy-dx;inttwoDy=2*dy,twoDyMinusDx=2*(dy-dx);intx,y;if(x0>xEnd){x=xEnd;y=yEnd;xEnd=x0;}else{x=x0;y=y0;}setPixel(x,y);while(x<xEnd){x++;if(p<0)p+=twoDy;else{y++;p+=twoDyMinusDx;}setPixel(x,y);}}GLintclipTest(GLfloatp,GLfloatq,GLfloat*u1,GLfloat*u2){GLfloatr;GLintreturnValue=true;if(p<0.0){r=q/p;if(r>*u2)returnValue=false;elseif(r>*u1)*u1=r;}elseif(p>0.0){r=q/p;if(r<*u1)returnValue=false;elseif(r<*u2)*u2=r;}elseif(q<0.0)returnValue=false;return(returnValue);}voidlineClipLiangBarsk(wcPt2DwinMin,wcPt2DwinMax,wcPt2Dp1,wcPt2Dp2){GLfloatu1=0.0,u2=1.0,dx=p2.getx()-p1.getx(),dy;GLfloatx1=p1.getx(),y1=p1.gety();GLfloatx2=p2.getx(),y2=p2.gety();if(clipTest(-dx,p1.getx()-winMin.getx(),&u1,&u2))if(clipTest(dx,winMax.getx()-p1.getx(),&u1,&u2)){dy=p2.gety()-p1.gety();if(clipTest(-dy,p1.gety()-winMin.gety(),&u1,&u2)){if(clipTest(dy,winMax.gety()-p1.gety(),&u1,&u2)){if(u2<1.0){p2.setCoords(p1.getx()+u2*dx,p1.gety()+u2*dy);}if(u1>0.0){p1.setCoords(p1.getx()+u1*dx,p1.gety()+u1*dy);}glColor3f(0.0,0.0,0.0);lineBres(x1,y1,p1.getx(),p1.gety());lineBres(p2.getx(),p2.gety(),x2,y2);glColor3f(1.0,0.0,0.0);lineBres(p1.getx(),p1.gety(),p2.getx(),p2.gety());}}else{glColor3f(0.0,0.0,0.0);lineBres(x1,y1,x2,y2);}}}voiddisplayliangyoudongcaijian(){glClear(GL_COLOR_BUFFER_BIT);glLineWidth(5.0);glColor3f(0.0,0.0,0.0);glBegin(GL_LINE_LOOP);glVertex2i(100,100);glVertex2i(100,-100);glVertex2i(-100,-100);glVertex2i(-100,100);glEnd();glPointSize(4);wcPt2Dtest1[4]{{-100.0,-100.0},{100.0,100.0},{-150.0,-200.0},{200.0,120.0}};wcPt2Dtest2[4]{{-100.0,-100.0},{100.0,100.0},{-150.0,-120.0},{0.0,0.0}};wcPt2Dtest3[4]{{-100.0,-100.0},{100.0,100.0},{-50.0,50.0},{150.0,150.0}};wcPt2Dtest4[4]{{-100.0,-100.0},{100.0,100.0},{-50.0,0.0},{60.0,50.0}};wcPt2Dtest5[4]{{-100.0,-100.0},{100.0,100.0},{-170.0,-200.0},{200.0,-120.0}};lineClipLiangBarsk(test1[0],test1[1],test1[2],test1[3]);lineClipLiangBarsk(test2[0],test2[1],test2[2],test2[3]);lineClipLiangBarsk(test3[0],test3[1],test3[2],test3[3]);lineClipLiangBarsk(test4[0],test4[1],test4[2],test4[3]);lineClipLiangBarsk(test5[0],test5[1],test5[2],test5[3]);glFlush();}voidmain(intargc,char*argv[]){glutInit(&argc,argv);glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);glutInitWindowPosition(50,100);glutInitWindowSize(400,300);glutCreateWindow("梁友栋裁剪算法")；init();glutDisplayFunc(displayliangyoudongcaijian);glutMainLoop();}学生端程序区口安全卫士都口软件管乐Phu+0shop复件计算机图形学实验报告1.docMicrosoftWord9...复件(2)计算机图形学实监报告1"叱MicrosoftWord9...复件C5)计算机图也学实脸报告1"叱MicrciEoftWord9...复件(4)计算机图形学实蛉报告1.dmMicroEoftWord9...实脸学生端程序区口安全卫士都口软件管乐Phu+0shop复件计算机图形学实验报告1.docMicrosoftWord9...复件(2)计算机图形学实监报告1"叱MicrosoftWord9...复件C5)计算机图也学实脸报告1"叱MicrciEoftWord9...复件(4)计算机图形学实蛉报告1.dmMicroEoftWord9...实脸15-0FEHGL画茶壶并旋转.d叱xMicroioftWord文档显示去面体蒋典20151060071.docMicrosoftWord9...我网几分法成国.九心二duCXMicrosoftlirLellDA.docxMicrosoftWord文电142KBa■我看实磬报告验剪cr点IEcr实裁ml中20M1中点届一doMicrosoft假期匚I甘日■类型：Mier口