#include <GL/gl.h>
#include <GL/glu.h>
#define GLUT_DISABLE_ATEXIT_HACK
#include <GL/glut.h>

void init(void)
{
   GLfloat mat_specular[] = { 0.0, 0.0, 0.0, 0.0 };
   GLfloat mat_shininess[] = { 50.0 };
   GLfloat light_position[] = { 0.0, 0.0, 2.0, 0.0};
   glClearColor (0.0, 0.0, 0.0, 0.0);
   glShadeModel (GL_SMOOTH);

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

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

void sphere1()
{
   
glMatrixMode (GL_MODELVIEW);
  float z = 10.0f;
  
       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
              glRotatef(z, 0.0f, 1.0f, 0.0f);
              
             glutSolidSphere (0.5, 400, 400);
              glutSwapBuffers();
          
     
  
}
void sphere2()
{
    
glMatrixMode (GL_MODELVIEW);
  float z = 10.0f;
  
       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
              glRotatef(z, 0.0f, 1.0f, 0.0f);
              
             glutSolidSphere (0.5, 400, 400);
              glutSwapBuffers();
                
}

void drawStuff()
{
     sphere1();
     sphere2();
     
}


     

void reshape (int w, int h)
{
   glViewport (0, 0, (GLsizei) w, (GLsizei) h);
   glMatrixMode (GL_PROJECTION);
   glLoadIdentity();
     //glTranslatef(0.0, 0.5, 0.0);
   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_DOUBLE | GLUT_RGB | GLUT_DEPTH);
   glutInitWindowSize (500, 500);
   glutInitWindowPosition (100, 100);
   glutCreateWindow (argv[0]);
   init ();
   glutIdleFunc(drawStuff);
   glutDisplayFunc(drawStuff);
   glutReshapeFunc(reshape);
   glutMainLoop();
   return 0;
}