Opengl实现3d小球

#include<GL/glut.h>
#include<stdlib.h>
#include<stdio.h>
#include<time.h>
#include<math.h>


void init(void)
{
printf("  init");
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};  //r-l u-d f-b
GLfloat  diffuseLight[] = { 1.0f, 1.0f, 1.0f, 1.0f};
GLfloat  specular[] = { 1.0f, 1.0f, 1.0f, 1.0f};

glClearColor(0.3,0.8,0.8,0.0); //bgc
glColor3ub(23, 17, 215);
glShadeModel(GL_SMOOTH);

glMaterialfv(GL_FRONT,GL_SPECULAR,mat_specular);
glMaterialfv(GL_FRONT,GL_SHININESS,mat_shininess);
glLightfv(GL_LIGHT0,GL_DIFFUSE,diffuseLight); 
glLightfv(GL_LIGHT0,GL_SPECULAR,specular); 
glLightfv(GL_LIGHT0,GL_POSITION,light_position); 

glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);