Write a glut program to draw 3D cube with lightening effect.

CODE:

#include <stdio.h>

#include <stdlib.h>

#include <windows.h>

#if defined(__APPLE__)

#include <GLUT/glut.h>

#else

#include <GL/glut.h>

#endif

GLfloat light_diffuse[] = {1.0, 0.0, 0.0, 1.0}; 

GLfloat light_position[] = {1.0, 1.0, 1.0, 0.0}; 

GLfloat n[6][3] = {    {-1.0, 0.0, 0.0}, {0.0, 1.0, 0.0}, {1.0, 0.0, 0.0},

  {0.0, -1.0, 0.0}, {0.0, 0.0, 1.0}, {0.0, 0.0, -1.0} };

GLint faces[6][4] = {    {0, 1, 2, 3}, {3, 2, 6, 7}, {7, 6, 5, 4},

  {4, 5, 1, 0}, {5, 6, 2, 1}, {7, 4, 0, 3} };

GLfloat v[8][3]; 

void

drawBox(void)

{

  int i;

  for (i = 0; i < 6; i++) {

    glBegin(GL_QUADS);

    glNormal3fv(&n[i][0]);

    glVertex3fv(&v[faces[i][0]][0]);

    glVertex3fv(&v[faces[i][1]][0]);

    glVertex3fv(&v[faces[i][2]][0]);

    glVertex3fv(&v[faces[i][3]][0]);

    glEnd();

  }

}

void

display(void)

{

  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

  drawBox();

  glutSwapBuffers();

}

void

init(void)

{

  /* Setup cube vertex data. */

  v[0][0] = v[1][0] = v[2][0] = v[3][0] = -1;

  v[4][0] = v[5][0] = v[6][0] = v[7][0] = 1;

  v[0][1] = v[1][1] = v[4][1] = v[5][1] = -1;

  v[2][1] = v[3][1] = v[6][1] = v[7][1] = 1;

  v[0][2] = v[3][2] = v[4][2] = v[7][2] = 1;

  v[1][2] = v[2][2] = v[5][2] = v[6][2] = -1;

  /* Enable light. */

  glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);

  glLightfv(GL_LIGHT0, GL_POSITION, light_position);

  glEnable(GL_LIGHT0);

  glEnable(GL_LIGHTING);

  /* Hidden surface elimination. */

  glEnable(GL_DEPTH_TEST);

  glMatrixMode(GL_PROJECTION);

  gluPerspective(40.0, 1.0, 1.0, 10.0);

  glMatrixMode(GL_MODELVIEW);

  gluLookAt(0.0, 0.0, 5.0,     0.0, 0.0, 0.0,    0.0, 1.0, 0.);   

  /* Adjust cube position angle. */

  glTranslatef(0.0, 0.0, -1.0);

  glRotatef(60, 1.0, 0.0, 0.0);

  glRotatef(-20, 0.0, 0.0, 1.0);

}

int

main(int argc, char **argv)

{

  glutInit(&argc, argv);

  glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);

  glutCreateWindow("");

  glutDisplayFunc(display);

  init();

  glutMainLoop();

  return 0;            

}

OUTPUT: