计算机图形学实验报告(同名14180)

计算机图形学实验报告(同名14180)计算机图形学计算机图形学实验报告计算机图形学课计算机图形学课程实验报告姓名：姓名：学号：DDA算法绘制直线DDA算法绘制直线实验一dx=x1-x0;dy=y1-y0;x=x0;y=y0;if(abs(dx)>abs(dy))epsl=abs(dx);elseepsl=abs(dy);xIncre=(float)dx/(float)epsl;yIncre=(float)dy/(float)epsl;for(k=0;k<=epsl;k++){glPointSize(3);glBegin(GL_POINTS);glVertex2i(int(x+0.5),(int)(y+0.5));glEnd();x+=xIncre;y+=yIncre;}}voidDisplay(void){glClear(GL_COLOR_BUFFER_BIT);DDALine(100,100,200,180);glFlush();}voidwinReshapeFcn(GLintnewWidth,GLintnewHeight){glMatrixMode(GL_PROJECTION);glLoadIdentity();gluOrtho2D(0.0,GLdouble(newWidth),0.0,GLdouble(newHeight));glClear(GL_COLOR_BUFFER_BIT);winWidth=newWidth;winHeight=newHeight;}intmain(intargc,char*argv[]){glutInit(&argc,argv);glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);glutInitWindowSize(400,300);glutInitWindowPosition(100,120);glutCreateWindow("line");Initial();glutDisplayFunc(Display);glutReshapeFunc(winReshapeFcn);glutMainLoop();return0;}Bresenham算法Bresenham算法实验二实验二Bresenham绘制直线和圆一、【实验目的】1.掌握Bresenham算法扫描转换圆和直线的基本原理。二、【实验内容】1.利用Bresenham算法扫描转换圆和直线的基本原理编程实现对圆和直线的扫描转换。三、【测试数据及其结果】四、【实验源代码】绘制直线：#include<stdlib.h>#include<math.h>#include<GL/glut.h>#include<stdio.h>GLsizeiwinWidth=500;GLsizeiwinHeight=500;voidlineBres(intx0,inty0,intxEnd,intyEnd){glColor3f(0.0,0.0,1.0);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;}glPointSize(6);glBegin(GL_POINTS);glVertex2i(x,y);glEnd();while(x<xEnd){ x++; if(p<0) p+=twoDy; else{ y++;p+=twoDyMinusDx; }glPointSize(2);glBegin(GL_POINTS);glVertex2i(x,y);glEnd();}}voidinit(void){glClearColor(1.0,1.0,1.0,1.0);glShadeModel(GL_FLAT);}voiddisplay(void){glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);lineBres(10,10,400,300);glFlush();}voidwinReshapeFcn(GLintnewWidth,GLintnewHeight){glMatrixMode(GL_PROJECTION);glLoadIdentity();gluOrtho2D(0.0,GLdouble(newWidth),0.0,GLdouble(newHeight));glClear(GL_COLOR_BUFFER_BIT);winWidth=newWidth;winHeight=newHeight;}voidmain(intargc,char**argv){glutInit(&argc,argv);glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);glutInitWindowPosition(10,10);glutInitWindowSize(winWidth,winHeight);glutCreateWindow("lineBres");init();glutDisplayFunc(display);glutReshapeFunc(winReshapeFcn);glutMainLoop();}绘制圆：#include<gl/glut.h>voidinit(){glClearColor(0,0,0,0);}voidMidBresenhamCircle(intr){ intx,y,d; x=0; y=r; d=1-r; glBegin(GL_LINE_STRIP); while(x<=y){glVertex2f(x,y); if(d<0)d+=2*x+3; else{ d+=2*(x-y)+5; y--; } x++; } glEnd();}voiddisplay(){ glClearColor(1,1,1,1); glClear(GL_COLOR_BUFFER_BIT); glColor3f(1,0,0); MidBresenhamCircle(8); glRotated(45,0,0,1); MidBresenhamCircle(8); glRotated(45,0,0,1); MidBresenhamCircle(8);glRotated(45,0,0,1); MidBresenhamCircle(8); glRotated(45,0,0,1); MidBresenhamCircle(8); glRotated(45,0,0,1); MidBresenhamCircle(8); glRotated(45,0,0,1); MidBresenhamCircle(8); glRotated(45,0,0,1); MidBresenhamCircle(8);glutSwapBuffers();}voidreshape(intw,inth){ glViewport(0,0,w,h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluOrtho2D(-10,10,-10,10);}intmain(intargc,char**argv){ glutInit(&argc,argv); glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB); glutInitWindowSize(400,400); glutInitWindowPosition(100,100); glutCreateWindow("扫描转换圆"); glutDisplayFunc(display); glutReshapeFunc(reshape); glutMainLoop(); return0;}反走样及五环的绘制反走样及五环的绘制实验三实验三反走样及五环的绘制一、【实验目的】1.了解走样和反走样的内容，熟练掌握用opengl实现图形的反走样。

2.学会用反走样消除走样现象。3.学会五环的绘制方法。二、【实验内容】1.通过学习反走样相关课程，用opengl实现光栅图形的反走样。2.绘制五环。三、【测试数据及其结果】四、【实验源代码】反走样：#include<gl/glut.h>#pragmacomment(linker,"/subsystem:\"windows\"/entry:\"mainCRTStartup\"")GLuintlineList;//指定显示列表voidInitial(){ glClearColor(1.0f,1.0f,1.0f,0.0f); glLineWidth(12.0f); glColor4f(0.0,0.6,1.0,1.0); lineList=glGenLists(1);//获得一个显示列表标识 glNewList(lineList,GL_COMPILE);//定义显示列表 glBegin(GL_LINE_LOOP); glVertex2f(1.0f,1.0f);glVertex2f(4.0f,2.0f);glVertex2f(2.0f,5.0f); glEnd();glEndList();}voidChangeSize(GLsizeiw,GLsizeih){ if(h==0)h=1; glViewport(0,0,w,h); glMatrixMode(GL_PROJECTION);//指定设置投影参数 glLoadIdentity(); if(w<=h) gluOrtho2D(0.0,5.0,0.0,6.0*(GLfloat)h/(GLfloat)w); else gluOrtho2D(0.0,5.0*(GLfloat)w/(GLfloat)h,0.0,6.0); glMatrixMode(GL_MODELVIEW);//指定设置模型视图变换参数 glLoadIdentity();}voidDisplayt(void){ glClear(GL_COLOR_BUFFER_BIT); glCallList(lineList);//调用显示列表 glFlush();}voidDisplayw(void){ glClear(GL_COLOR_BUFFER_BIT); glEnable(GL_LINE_SMOOTH);//使用反走样 glEnable(GL_BLEND);//启用混合函数 glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);//指定混合函数 glCallList(lineList);//调用显示列表 glFlush();}voidmain(void){ glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB); glutInitWindowSize(300,300); glutCreateWindow("原始图形"); glutDisplayFunc(Displayt);glutReshapeFunc(ChangeSize); Initial(); glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB); glutInitWindowPosition(300,300); glutInitWindowSize(300,300); glutCreateWindow("反走样图形");glutDisplayFunc(Displayw); glutReshapeFunc(ChangeSize); Initial(); glutMainLoop();}五环：#include<gl/glut.h>#include<MATH.H>#pragmacomment(linker,"/subsystem:\"windows\"/entry:\"mainCRTStartup\"")constfloatPI=3.1415;voidDrawCircle(GLfloatradius){ GLfloatx,y,z; glBegin(GL_LINE_LOOP); for(intalpha=0;alpha<360;alpha++) { x=radius*cos(alpha*PI/180); y=radius*sin(alpha*PI/180); z=0; glVertex3f(x,y,z); } glEnd();}voidDisplay(){ glClearColor(1,1,1,1); glClear(GL_COLOR_BUFFER_BIT); glLoadIdentity(); glTranslatef(0,0,-25); glColor3f(0,1,0); glLineWidth(3); DrawCircle(3.0); glPopMatrix(); glPushMatrix(); glTranslatef(7,0,0); glColor3f(1,0,0); DrawCircle(3.0); glPopMatrix(); glPushMatrix(); glTranslatef(-7,0,0); glColor3f(0,0,1);DrawCircle(3.0); glPopMatrix(); glPushMatrix(); glTranslatef(-3.5,-3.5,0); glColor3f(0.3,0.5,0.7);DrawCircle(3.0); glPopMatrix(); glPushMatrix(); glTranslatef(3.5,-3.5,0); glColor3f(0.7,0.0,0.3);DrawCircle(3.0); glPopMatrix(); glutSwapBuffers();}voidreshape(intw,inth){ glViewport(0,0,w,h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(45,GLdouble(w)/h,1,100); glMatrixMode(GL_MODELVIEW);}voidmain(intargc,char**argv){ glutInit(&argc,argv); glutInitDisplayMode(GLUT_RGBA|GLUT_DOUBLE); glutInitWindowPosition(10,10); glutInitWindowSize(500,500); glutCreateWindow("Test"); glutDisplayFunc(Display); glutReshapeFunc(reshape); glutMainLoop();}多视区多视区实验四实验四多视区一、【实验目的】1.熟练掌握各种裁剪算法和二维观察变换。

2.学会在屏幕坐标系下创建多个视区、指定视区的宽度和高度，了解二维观察变换中包含窗口到视区的映射。二、【实验内容】1.在一个显示窗口内指定多个视区，分别显示具有相同坐标、不同颜色和不同显示模式的各种图形面。

2.在书本给定程序基础上，对程序做一些改变并在视区中绘制各种图形。三、【测试数据及其结果】四、【实验源代码】#include<gl/glut.h>#include<MATH.H>constfloatPI=3.1415;voidinitial(void){ glClearColor(1.0,1.0,1.0,1.0); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluOrtho2D(-10.0,10.0,-10.0,10.0);}voidtriangle(GLsizeimode){ if(mode==1) glPolygonMode(GL_FRONT_AND_BACK,GL_LINE); else glPolygonMode(GL_FRONT_AND_BACK,GL_FILL); glBegin(GL_TRIANGLES); glVertex2f(0.0,5.0); glVertex2f(5.0,-5.0); glVertex2f(-5.0,-5.0); glEnd();}voidpolygon(GLsizeimode){ if(mode==1) glPolygonMode(GL_FRONT_AND_BACK,GL_LINE); else glPolygonMode(GL_FRONT_AND_BACK,GL_FILL); glBegin(GL_POLYGON); glVertex2f(2.0,7.0); glVertex2f(5.0,3.0); glVertex2f(4.0,0.0); glVertex2f(0.0,0.0); glVertex2f(1.0,4.0); glEnd();}voidDrawCircle(GLfloatr){ GLfloatx,y,z; glBegin(GL_LINE_LOOP); for(intalpha=0;alpha<360;alpha++) { x=r*cos(alpha*PI/180); y=r*sin(alpha*PI/180); z=0; glVertex3f(x,y,z); } glEnd();}voidDisplay(){ glClear(GL_COLOR_BUFFER_BIT); glColor3f(1.0,0.0,0.0); glViewport(0,0,100,100); triangle(1);glColor3f(0.0,0.0,1.0);glViewport(100,0,100,100); triangle(2); glColor3f(1.0,0.0,0.0);glViewport(0,100,100,100);polygon(2); glViewport(100,100,100,100);DrawCircle(5); glFlush();}voidmain(void){ glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB); glutInitWindowPosition(10,10); glutInitWindowSize(400,200); glutCreateWindow("多视区"); initial(); glutDisplayFunc(Display); glutMainLoop();}分子模型分子模型实验五实验五分子模型一、【实验目的】1.熟练掌握二维、三维几何变换矩阵和透视投影的相关知识从而用opengl实现分子模型的运动。

2.熟练掌握opengl中相关函数的调用和实现。二、【实验内容】1.显示分子模型：红色大球表示原子，三个黄色小球表示电子，分别绕原子旋转，采用透视投影变换显示电子旋转过程。2.启用深度测试和模型视图矩阵完成分子动画。三、【测试数据及其结果】四、【实验源代码】#include<gl/glut.h>GLintangleSelf=0;voidInitial(){ glEnable(GL_DEPTH_TEST); glClearColor(1.0f,1.0f,1.0f,1.0f);}voidChangeSize(intw,inth){ if(h==0)h=1; glViewport(0,0,w,h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); GLfloatfAspect; fAspect=(float)w/(float)h; gluPerspective(45.0,fAspect,1,500.0); glMatrixMode(GL_MODELVIEW); glLoadIdentity();}voidDisplay(void){ staticfloatfElect1=0.0f; glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glTranslatef(0.0f,0.0f,-250.0f); glColor3f(1.0f,0.0f,0.0f); glutWireSphere(12.0f,15,15); glColor3f(0.0f,1.0f,0.0f); glPushMatrix(); glRotatef(fElect1,0.0f,1.0f,0.0f); glTranslatef(90.0f,0.0f,0.0f); glRotatef(angleSelf,0,1,0); glutWireSphere(6.0f,15,15); glPopMatrix(); glPushMatrix(); glRotatef(45.0f,0.0f,0.0f,1.0f); glRotatef(fElect1,0.0f,1.0f,0.0f); glTranslatef(-70.0f,0.0f,0.0f); glRotatef(angleSelf,0,1,0); glutWireSphere(6.0f,15,15); glPopMatrix(); glPushMatrix(); glRotatef(-45.0f,0.0f,0.0f,1.0f); glRotatef(fElect1,0.0f,1.0f,0.0); glTranslatef(0.0f,0.0f,60.0f); glRotatef(angleSelf,0,1,0); glutWireSphere(6.0f,15,15); glPopMatrix(); fElect1+=5.0f; if(fElect1>360.0f)fElect1=10.0f; glutSwapBuffers();}voidRotateSelf(intvalue){ if(value==1) { angleSelf+=5; angleSelf%=360; glutPostRedisplay(); glutTimerFunc(100,RotateSelf,1); }}voidTimerFunc(intvalue){ glutPostRedisplay(); glutTimerFunc(100,TimerFunc,1);}intmain(intargc,char*argv[]){ glutInit(&argc,argv); glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB|GLUT_DEPTH); glutCreateWindow("分子动画示例"); glutReshapeFunc(ChangeSize); glutDisplayFunc(Display); glutTimerFunc(500,TimerFunc,1); glutTimerFunc(100,RotateSelf,1); Initial(); glutMainLoop(); return0;} Bezier曲线Bezier曲线实验六实验六Bezier曲线一、【实验目的】1.掌握Bezire曲线定义。

2.掌握设计绘制一次、二次和三次Bezier曲线算法。二、【实验内容】1.绘制NURBS曲面。2.基于Bezier定义根据控制多边形的阶次绘制

Bezier曲线。三、【测试数据及其结果】四、【实验源代码】原实验代码：#include<GL/glut.h>#include<math.h>#include<stdlib.h>classPt3D{public: GLfloatx,y,z;};voidGetCnk(GLintn,GLint*c){ GLinti,k; for(k=0;k<=n;k++){ c[k]=1; for(i=n;i>=k+1;i--)c[k]=c[k]*i; for(i=n-k;i>=2;i--)c[k]=c[k]/i; }}voidGetPointPr(GLint*c,GLfloatt,Pt3D*Pt,intControlN,Pt3D*ControlP){ GLintk,n=ControlN-1; GLfloatBernstein; Pt->x=0.0; Pt->y=0.0; Pt->z=0.0; for(k=0;k<ControlN;k++){Bernstein=c[k]*pow(t,k)*pow(1-t,n-k); Pt->x+=ControlP[k].x*Bernstein;Pt->y+=ControlP[k].y*Bernstein;Pt->z+=ControlP[k].z*Bernstein; }}voidBezierCurve(GLintm,GLintControlN,Pt3D*ControlP){ GLint*C,i; Pt3DCurvePt; C=newGLint[ControlN]; GetCnk(ControlN-1,C); glBegin(GL_POINTS); for(i=0;i<=m;i++){ GetPointPr(C,(GLfloat)i/(GLfloat)m,&CurvePt,ControlN,ControlP); glVertex2f(CurvePt.x,CurvePt.y); } glEnd(); delete[]C;}voidinitial(void){ glClearColor(1.0,1.0,1.0,1.0);}voidDisplay(void){ glClear(GL_COLOR_BUFFER_BIT); GLintControlN=4,m=500; Pt3DControlP[4]={{-80.0,-40.0,0.0},{-10.0,90.0,0.0},{10.0,-90.0,0.0},{80.0,40.0,0.0}}; glPointSize(2); glColor3f(0.0,0.0,0.0); BezierCurve(m,ControlN,ControlP); glBegin(GL_LINE_STRIP); for(GLinti=0;i<4;i++)glVertex3f(ControlP[i].x,ControlP[i].y,ControlP[i].z); glEnd(); glFlush();}voidreshape(GLintnewWidth,GLintnewHeight){ glViewport(0,0,newWidth,newHeight); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluOrtho2D(-100.0,100.0,-100.0,100.0); }voidmain(void){ glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB); glutInitWindowPosition(100,100); glutInitWindowSize(400,400); glutCreateWindow("Bezier曲线"); initial(); glutDisplayFunc(Display); glutReshapeFunc(reshape); glutMainLoop();}加改后的：#include<GL/glut.h>voidinitial(void){glClearColor(1.0,1.0,1.0,1.0);glLineWidth(4.0);GLfloatControlP[4][3]={{-80.0,40.0,0.0},{-10.0,90.0,0.0},{10.0,-90.0,0.0},{80.0,40.0,0.0}};glMap1f(GL_MAP1_VERTEX_3,0.0,1.0,3,4,*ControlP);glEnable(GL_MAP1_VERTEX_3);}voidDisplay(void){glClear(GL_COLOR_BUFFER_BIT);glColor3f(1.0,0.0,0.0);glMapGrid1f(100,0.0,1.0);glEvalMesh1(GL_LINE,0,100);glFlush();}voidReshape(GLintnewWidth,GLintnewHeight){glViewport(0,0,newWidth,newHeight);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluOrtho2D(-100.0,100.0,-100.0,100.0);}voidmain(void){glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);glutInitWindowPosition(100,100);glutInitWindowSize(400,400);glutCreateWindow("Bezier曲线");initial();glutDisplayFunc(Display);glutReshapeFunc(Reshape);glutMainLoop();NURBSNURBS实验九实验七NURBS曲面和Bezier曲面一、【实验目的】1.掌握NURBS曲线定义。

2.掌握设计绘制一次、二次和三次NURBS曲面算法。二、【实验内容】1.在屏幕上单击鼠标左键绘制控制多边形，基于NURBS定义根据控制多边形的阶次绘制NURBS曲面。2.绘制的曲面中，红色的点表示曲面的控制点，并增加了光标键控制旋转的交互式方式，以获得更好的显示效果。三、【测试数据及其结果】四、【实验源代码】NURBS曲面：#include<windows.h>#include<gl/glut.h>#include<math.h>GLUnurbsObj*pNurb=NULL;GLintnNumPoints=4;GLfloatctrlPoints[4][4][3]={{{-6.0f,-6.0f,0.0f},{-6.0f,-2.0f,0.0f},{-6.0f,2.0f,0.0f},{-6.0f,6.0f,0.0f}},{{-2.0f,-6.0f,0.0f},{-2.0f,-2.0f,8.0f},{-2.0f,2.0f,8.0f},{-2.0f,6.0f,0.0f}},{{2.0f,-6.0f,0.0f},{2.0f,-2.0f,8.0f},{2.0f,2.0f,8.0f},{2.0f,6.0f,0.0f}},{{6.0f,-6.0f,0.0f},{6.0f,-2.0f,0.0f},{6.0f,2.0f,0.0f},{6.0f,6.0f,0.0f}}};GLfloatKnots[8]={0.0f,0.0f,0.0f,0.0f,1.0f,1.0f,1.0f,1.0f};staticGLfloatxRot=0.0f;staticGLfloatyRot=0.0f;voidDrawPoints(void){ inti,j; glPointSize(5.0f); glColor3ub(255,0,0); glBegin(GL_POINTS); for(i=0;i<4;i++) for(j=0;j<4;j++) glVertex3fv(ctrlPoints[i][j]); glEnd();}voidInitial(){ glClearColor(1.0f,1.0f,1.0f,1.0f); pNurb=gluNewNurbsRenderer(); gluNurbsProperty(pNurb,GLU_SAMPLING_TOLERANCE,25.0f);gluNurbsProperty(pNurb,GLU_DISPLAY_MODE,(GLfloat)GLU_OUTLINE_POLYGON);}voidReDraw(void){ glColor3ub(0,0,220); glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_MODELVIEW); glPushMatrix(); glRotatef(330.0f,1.0f,0.0f,0.0f); glRotatef(xRot,1.0f,0.0f,0.0f); glRotatef(yRot,0.0f,1.0f,0.0f); gluBeginSurface(pNurb); gluNurbsSurface(pNurb, 8, Knots, 8, Knots, 4*3, 3, &ctrlPoints[0][0][0], 4, 4, GL_MAP2_VERTEX_3); gluEndSurface(pNurb); DrawPoints(); glPopMatrix(); glutSwapBuffers();}voidSpecialKeys(intkey,intx,inty){ if(key==GLUT_KEY_UP)xRot-=5.0f; if(key==GLUT_KEY_DOWN)xRot+=5.0f; if(key==GLUT_KEY_LEFT)yRot-=5.0f; if(key==GLUT_KEY_RIGHT)yRot+=5.0f; if(xRot>356.0f)xRot=0.0f; if(xRot<-1.0f)xRot=355.0f; if(yRot>356.0)yRot=0.0f; if(yRot<-1.0f)yRot=355.0f; glutPostRedisplay();}voidChangeSize(intw,inth){ if(h==0)h=1; glViewport(0,0,w,h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(45.0f,(GLdouble)w/(GLdouble)h,1.0,40.0f); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glTranslatef(0.0f,0.0f,-20.0f);}intmain(intargc,char**argv){ glutInit(&argc,argv); glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB|GLUT_DEPTH); glutCreateWindow("NURBS曲面"); glutReshapeFunc(ChangeSize); glutDisplayFunc(ReDraw); glutSpecialFunc(SpecialKeys); Initial(); glutMainLoop(); return0;}NURBS曲面和Bezier曲面NURBS曲面和Bezier曲面实验七在原来的基础上加的：#include<windows.h>#include<gl/glut.h>#include<math.h>GLUnurbsObj*pNurb=NULL;GLintnNumPoints=4;GLfloatKnots[8]={0.0f,0.0f,0.0f,0.0f,1.0f,1.0f,1.0f,1.0f};GLfloatControlP[4][4][3]={{{-1.5,-1.5,4.0},{-0.5,-1.5,2.0},{-0.5,-1.5,-1.0},{1.5,-1.5,2.0}},{{-1.5,-0.5,1.0},{-0.5,-0.5,3.0},{-0.5,-0.5,0.0},{1.5,-0.5,-1.0}},{{-1.5,0.5,4.0},{-0.5,0.5,0.0},{0.5,0.5,3.0},{1.5,0.5,4.0}},{{-1.5,1.5,-2.0},{-0.5,1.5,-2.0},{0.5,1.5,0.0},{1.5,1.5,-1.0}}};voidDrawPoints(void){ inti,j; glPointSize(5.0f); glColor3ub(255,0,0); glBegin(GL_POINTS); for(i=0;i<4;i++) for(j=0;j<4;j++) glVertex3fv(ControlP[i][j]); glEnd();}voidReDraw(void){ glColor3ub(0,0,220); glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_MODELVIEW); glMap2f(GL_MAP2_VERTEX_3,0.0,1.0,3,4,0.0,1.0,12,4,&ControlP[0][0][0]); glEnable(GL_MAP2_VERTEX_3); glColor3f(1.0,1.0,1.0); glMapGrid2f(40,0.0,1.0,40,0.0,1.0); glEvalMesh2(GL_FILL,0,40,0,40); DrawPoints(); glutSwapBuffers();}voidChangeSize(intw,inth){ if(h==0)h=1; glViewport(0,0,w,h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(45.0f,(GLdouble)w/(GLdouble)h,1.0,40.0f); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glTranslatef(0.0f,0.0f,-20.0f);}intmain(intargc,char*argv[]){ glutInit(&argc,argv); glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB|GLUT_DEPTH); glutCreateWindow("NURBS曲面"); glutReshapeFunc(ChangeSize); glutDisplayFunc(ReDraw); glutMainLoop(); return0;}两点光源在球体上的效果两点光源在球体上的效果实验八实验八两点光源在球体上的效果一、【实验目的】1.掌握漫反射光、镜面反射光和聚光源的含义。

2.掌握opengl中不同点光源的设置。二、【实验内容】1.设置两个光源，一个是漫反射的蓝色点光源，另一个是红色聚光光源，他们都照在一个球体上，产生亮斑。2.调用opengl中的函数指定当前设定的材质应用于物体表面的哪个面，从而使光照下产生特殊的效果。三、【测试数据及其结果】四、【实验源代码】#include<windows.h>#include<gl