// 范例P124.cpp : Defines the entry point for the console application.// #include "stdafx.h"#include <gl/glut.h> static int spin=0; void display(){ glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);     //清除所有像素  GLfloat light_position[]={5,5,10,1.0};//光源1位置  glPushMatrix(); glRotated((GLdouble)spin,1.0, 0.0, 0.0); glLightfv(GL_LIGHT0,GL_POSITION,light_position); glPopMatrix(); glLoadIdentity(); glTranslated(0,0,-3); glutSolidSphere(1.0,20,16); /*在缓存中绘制4对顶点坐标的矩形*/  glFlush();          //立即显示出来} void init(){ glClearColor(0.0,0.0,0.0,0.0);     //用黑色清除背景   GLfloat mat_specular[]={1.0, 1.0, 1.0, 1.0}; //材质镜面反射色 GLfloat mat_shininess[]={50.0};     //光洁度，即物体反射比率 GLfloat lmodel_ambient[]={0.2,0.2,0.2,1.0};  //全局环境光  //第一个光源 GLfloat light_position[]={5,5,10,1.0};   //光源1位置 GLfloat white_light[]={1.0,1.0,1.0,1.0};  //光源1散射光与镜面反射光相同  //第二个光源 GLfloat light1_diffuse[]={1.0, 0.0, 0.0, 1.0}; //光源2散射光 GLfloat light1_specular[]={1.0, 0.0, 0.0, 1.0}; //光源2镜面反射光 GLfloat light1_position[]={-2.0, -2.0, 3.0, 1.0};//光源2位置 GLfloat spot_direction[]={0.0, 0.0, 0.0};  //光源2聚光灯方向  glShadeModel(GL_SMOOTH); glMaterialfv(GL_FRONT,GL_SPECULAR,mat_specular); glMaterialfv(GL_FRONT,GL_SHININESS,mat_shininess);  //光源2设置 glLightfv(GL_LIGHT1,GL_DIFFUSE,light1_diffuse); glLightfv(GL_LIGHT1,GL_SPECULAR,light1_specular); glLightfv(GL_LIGHT1,GL_POSITION,light1_position); glLightf(GL_LIGHT1,GL_CONSTANT_ATTENUATION,1.5); glLightf(GL_LIGHT1,GL_LINEAR_ATTENUATION,0.5); glLightf(GL_LIGHT1,GL_QUADRATIC_ATTENUATION,0.2);  glLightf(GL_LIGHT1,GL_SPOT_CUTOFF,-45.0); glLightfv(GL_LIGHT1,GL_SPOT_DIRECTION,spot_direction); glLightf(GL_LIGHT1,GL_SPOT_EXPONENT,100);  //光源1设置 glLightfv(GL_LIGHT0,GL_POSITION,light_position); glLightfv(GL_LIGHT0,GL_DIFFUSE,white_light); glLightfv(GL_LIGHT0,GL_SPECULAR,white_light); glLightModelfv(GL_LIGHT_MODEL_AMBIENT,lmodel_ambient);  glEnable(GL_LIGHTING); glEnable(GL_LIGHT1); glEnable(GL_LIGHT0); glEnable(GL_DEPTH_TEST);} void reshape(int w,int h){ glViewport(0,0,(GLsizei)w,(GLsizei)h); glMatrixMode(GL

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