Write a glut program to draw sphere with horizontal and vertical lines

CODE:

#include <stdio.h>

#include <stdlib.h>

#include <windows.h>

#include <MATH.h>

#if defined(__APPLE__)

#include <GLUT/glut.h>

#else

#include <GL/glut.h>

#endif

#define PI 3.1415926535898

#define PI 3.1415926535898

void MySphere(GLfloat radius)

{

  GLdouble inc = PI/12;

  GLdouble theta, phi;

  bool even = true;

  for (theta=-PI/2; theta<(PI/2-inc);theta+=inc){

    for (phi = 0; phi < 2*PI;phi+=inc) {

      glBegin(GL_POLYGON);

      glVertex3f(radius*cos(theta)*cos(phi),      radius*sin(theta),radius*cos(theta)*sin(phi));

      glVertex3f(radius*cos(theta+inc)*cos(phi), radius*sin(theta+inc),radius*cos(theta+inc)*sin(phi));

      glVertex3f(radius*cos(theta+inc)*cos(phi+inc), radius*sin(theta+inc),radius*cos(theta+inc)*sin(phi+inc));

      glVertex3f(radius*cos(theta)*cos(phi+inc), radius*sin(theta),radius*cos(theta)*sin(phi+inc));

    glEnd();

    }

  } 

  glFlush();

}

void Display(void)

{

       glClear (GL_COLOR_BUFFER_BIT);

       GLfloat mat_diffuse[] = { 2.0, 1.0, 7.0,1.0};

       GLfloat mat_ambient[] = { 0.0, 0.0, 2.0,1.0};

       GLfloat mat_specular[] = { 1.0, 1.0,1.0,1.0};                

       GLfloat mat_shininess[] = {14.0 };

       glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);

       glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);

       glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);

       glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);

       glEnable(GL_LIGHTING);

       glEnable(GL_LIGHT0);

       glColor3f (0.0, 0.0, 0.0);

       glTranslatef(0.,0.,-5.);

           glTranslatef(-2,0.,0.);

       MySphere(1.5);

glTranslatef(4,0.,0);

       glRotatef(90,1.,0.,0.);

       glutSolidSphere(1.5,24,12);

       glFlush();

}

void reshape (int w, int h)

{

    glViewport (0, 0, (GLsizei) w, (GLsizei) h);

    glMatrixMode (GL_PROJECTION);

    glLoadIdentity();

       glFrustum (-0.5*(GLfloat)w/h,0.5*(GLfloat)w/h, -0.5,0.5, 1., 20.0);

    glMatrixMode (GL_MODELVIEW);

       glLoadIdentity ();

       gluLookAt(0.2,0.2,3, 0,0,-100,0.,1.,0.);

}

void init(void)

{

  glClearColor(1.0,1.0,1.0,1.0);

  glPolygonMode(GL_FRONT, GL_LINE);

  glPolygonMode(GL_BACK, GL_LINE);

}

void main(int argc, char* argv[])

{

  glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB );

  glutInitWindowSize (320, 200);  

  glutCreateWindow("A Sphere");

  init();

  glutDisplayFunc(Display);

  glutReshapeFunc(reshape);

  glutMainLoop();

}

OUTPUT: