#include <GL/glut.h>

void display(void)
{
  int i;
  GLdouble vertex[8][3] = {
    { 0.0, 0.0, 0.0 }, { 1.0, 0.0, 0.0 },
    { 1.0, 1.0, 0.0 }, { 0.0, 1.0, 0.0 },
    { 0.0, 0.0, 1.0 }, { 1.0, 0.0, 1.0 },
    { 1.0, 1.0, 1.0 }, { 0.0, 1.0, 1.0 }
  };
  int edge[12][2] = {
    { 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 0 },
    { 4, 5 }, { 5, 6 }, { 6, 7 }, { 7, 4 },
    { 0, 4 }, { 1, 5 }, { 2, 6 }, { 3, 7 }
  };
  
  glClear(GL_COLOR_BUFFER_BIT);  
  glColor3d(0.0, 0.0, 0.0);
  glBegin(GL_LINES);
  for (i = 0; i < 12; i++) {
    glVertex3dv(vertex[edge[i][0]]);
    glVertex3dv(vertex[edge[i][1]]);
  }
  glEnd();
}

void keyboard(unsigned char key, int x, int y)
{
  if (key == '\033') exit(0);
}

void resize(int w, int h)
{
  glViewport(0, 0, w, h);
  glLoadIdentity();
  /* 1 */
  glOrtho(-2.0, 2.0, -2.0, 2.0, -2.0, 2.0);
  /* 2 *//*
  gluPerspective(30.0, 1.0, 1.0, 10.0);
  glTranslated(0.0, 0.0, -5.0);
  glRotated(5.0, 1.0, 1.0, 0.0);
*//* 3 *//*
  gluPerspective(30.0, 1.0, 1.0, 10.0);
  gluLookAt(3.0, 4.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
*/
}

int main(int argc, char *argv[])
{
  glutInit(&argc, argv);
  glutInitDisplayMode(GLUT_RGBA);
  glutCreateWindow(argv[0]);
  glClearColor(1.0, 1.0, 1.0, 0.0);
  glutDisplayFunc(display);
  glutKeyboardFunc(keyboard);
  glutReshapeFunc(resize);
  glutMainLoop();
  return 0;
}