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1、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#includeGLfloatlight_position[]={0.0,3.0,6.0,0.0};GLfloatno_mat[]={0.0,0.0,0.0,1.0};GLfloatmat_grey_ambient[]={0
2、.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};void
3、myInit(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
4、GL_DEPTH_BUFFER_BIT); glP
5、ushMatrix(); /*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 g
6、lEnable(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); glutSoli
7、dSphere(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(int
8、w,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); else glOrtho(-5.5*(GLfloat)w/(GLfloat)h,5.5*(GLfloat)w/(GLfloat)h,-5.5,5.5,-5.5,5.5)
9、; glMatrixMode(GL_MODELVIEW); glLoadIdentity();}intmain(intargc,char**argv){ /*初始化*/ glutInit(&argc,arg
