OpenGL编程轻松入门之使用光照和材质2006-05-1811:24作者：黄燕出处：天极开发责任编辑：方舟使用了光照和材质可以使物体更逼真，具有立体感。例4就是没有使用光照使呈现在我们眼前的物体茶壶和立方体没有立体感。例6：绘制三个使用不同材质的球体。#include<windows.h>#include<GL/glut.h>GLfloatlight_position[]={0.0,3.0,6.0,0.0};GLfloatno_mat[]={0.0,0.0,0.0,1.0};GLfloatmat_grey_ambient[]={0.5,0.5,0.5,1.0};GLfloatmat_red_ambient[]={0.0,0.0,1.0,1.0};GLfloatmat_diffuse[]={0.8,0.2,0.5,1.0};GLfloatmat_specular[]={1.0,1.0,1.0,1.0};GLfloatno_shininess[]={0.0};GLfloatlow_shininess[]={5.0};GLfloathigh_shininess[]={100.0};GLfloatmat_emission[]={0.3,0.2,0.2,0.0};voidmyInit(void){glLightfv(GL_LIGHT2,GL_POSITION,light_position);//设置光源glEnable(GL_DEPTH_TEST);glDepthFunc(GL_LESS);//指定深度比较中使用的数值glEnable(GL_LIGHTING);glEnable(GL_LIGHT0);glShadeModel(GL_SMOOTH);}voiddisplay(void){glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);glPushMatrix();/*为光照模型指定材质参数*/glMaterialfv(GL_FRONT,GL_DIFFUSE,mat_diffuse);glMaterialfv(GL_FRONT,GL_SPECULAR,mat_specular);glMaterialfv(GL_FRONT,GL_SHININESS,high_shininess);glMaterialfv(GL_FRONT,GL_EMISSION,no_mat);glColorMaterial(GL_FRONT,GL_AMBIENT);//使材质色跟踪当前颜色glEnable(GL_COLOR_MATERIAL);/*第一个球形*/glPushMatrix();glColor3fv(no_mat);glTranslatef(-2.5,1.5,0.0);glRotatef(15.0,1.0,0.0,0.0);glutSolidSphere(1.2,20.0,20.0);glPopMatrix();/*第二个球形*/glPushMatrix();glColor3fv(mat_grey_ambient);glRotatef(15.0,1.0,0.0,0.0);glutSolidSphere(1.2,20.0,20.0);glPopMatrix();/*第三个球形*/glPushMatrix();glColor3fv(mat_red_ambient);glTranslatef(2.5,-1.5,0.0);glRotatef(15.0,1.0,0.0,0.0);glutSolidSphere(1.2,20.0,20.0);glPopMatrix();glDisable(GL_COLOR_MATERIAL);glPopMatrix();glFlush();}voidmyReshape(intw,inth){glViewport(0,0,(GLsizei)w,(GLsizei)h);glMatrixMode(GL_PROJECTION);glLoadIdentity();if(w<=h)glOrtho(-5.5,5.5,-5.5*(GLfloat)h/(GLfloat)w,5.5*(GLfloat)h/(GLfloat)w,-5.5,5.5);elseglOrtho(-5.5*(GLfloat)w/(GLfloat)h,5.5*(GLfloat)w/(GLfloat)h,-5.5,5.5,-5.5,5.5);glMatrixMode(GL_MODELVIEW);glLoadIdentity();}intmain(intargc,char**argv){/*初始化*/glutInit(&argc,argv);glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);glutI