// 范例P124.cpp : Defines the entry point for the console application.// #include "stdafx.h"#include <gl/glut.h> void display(){ glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);     //清除所有像素 glutSolidSphere(1.0,20,6); /*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}; GLfloat mat_shininess[]={50.0}; GLfloat light_position[]={1.0,1.0,1.0,0.0}; GLfloat white_light[]={1.0,1.0,1.0,1.0}; GLfloat lmodel_ambient[]={0.1,0.1,0.1,1.0 };  glShadeModel(GL_SMOOTH); glMaterialfv(GL_FRONT,GL_SPECULAR,mat_specular); glMaterialfv(GL_FRONT,GL_SHININESS,mat_shininess); 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_LIGHT0); glEnable(GL_DEPTH_TEST);}void reshape(int w,int h){ glViewport(0,0,(GLsizei)w,(GLsizei)h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); if(w<=h)  glOrtho(-1.5,1.5,-1.5*(GLfloat)h/(GLfloat)w,1.5*(GLfloat)h/(GLfloat)w,-10.0,10.0); else  glOrtho(-1.5*(GLfloat)w/(GLfloat)h,1.5*(GLfloat)w/(GLfloat)h,-1.5,1.5,-10.0,10.0); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); }int main(int argc,char ** argv){ glutInit(&argc,argv); glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB); glutInitWindowSize(250,250);     //初始化窗口大小 glutInitWindowPosition(0,0);    //初始化窗口位置 glutCreateWindow("hello");      //创建标题为“hello”的窗口 init();           //调用初始化函数 glutDisplayFunc(display);      //注册回调函数 glutReshapeFunc(reshape); glutMainLoop();         //进入主循环处理事件 return 0;}  

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