Cara Membuat Kubus 3D dengn OpenGL

Syntax :
#include <GL/glut.h>

//GLfloat light_diffuse[] = {1.0/*pengaturan cahaya*/, 0.0/*pengaturan warna*/, 0.0, 1.0};          /* warna merah terang. */
GLfloat light_diffuse[] = {1.0, 0.0, 0.0, 1.0};          /* warna merah terang. */

GLfloat light_position[] = {0.0, 1.0, 1.0, 0.0};
       
GLfloat n[6][3] = {                                          /* secara normal kubus ada 6 muka. */
  {-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)
{
  /* pengaturan data vertek kubus. */
  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;

  /* meng-Enable-kan pencahayaan OpenGL single. */
  glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
  glLightfv(GL_LIGHT0, GL_POSITION, light_position);
  glEnable(GL_LIGHT0);
  glEnable(GL_LIGHTING);
  glEnable(GL_DEPTH_TEST);

  /* mengatur penglihatan kubus. */
  glMatrixMode(GL_PROJECTION);
/* sudut pandangan, aspek ratio,  kedekatan Z, jauh Z */
  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.);     
  /* mengatur posisi kubus */
  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("Kubus 3D-Pengaturan Cahaya");
  glutDisplayFunc(display);
  init();
  glutMainLoop();
  return 0; 
}          


Run :