const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f }; //宣告顏色
const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_position[] = { 2.0f, 5.0f, -5.0f, 0.0f };


    glEnable(GL_LIGHT0);
    glEnable(GL_NORMALIZE);
    glEnable(GL_COLOR_MATERIAL);
    glEnable(GL_LIGHTING);
  
    glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
    glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
    glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
    glLightfv(GL_LIGHT0, GL_POSITION, light_position);
  glutMainLoop(); 

void eye()

{

glPushMatrix();

glColor3f(1,1,1);

glutSolidSphere(0.1,20,20);

glTranslatef(0,0.03,0.08);

glColor3f(0,0,0);

glutSolidSphere(0.04,10,10);

glPopMatrix();

}

void head()

{

glPushMatrix();

glTranslatef(0,0.3,0);

glColor3f(0,0,1);

glutSolidSphere(0.3,30,30);

glColor3f(1,1,1);

glTranslatef(0,-0.01,0.1);

glutSolidSphere(0.25,30,30);

glPopMatrix();

glPushMatrix();

glColor3f(1,1,1);

//glutSolidSphere(0.2,30,30);

glPopMatrix();

}