/* -*-ePiX-*- */
#include "epix.h"
using namespace ePiX;

const P sz(5,3);

int main()
{
  picture(P(0,0), sz, "1.75 x 1.25in");

  begin();

  const P omega1(0.8*sz);
  const P omega2(0.18*sz);
  const P omega3(omega1 - omega2);
  const P omega4(omega1 - 2*omega2);

  const P dx(-2,-4);

  arrow_inset(0.25);

  line(P(0,0), sz);
  arrow(P(0,0), omega1);
  arrow(P(0,0), omega2);
  arrow(P(0,0), omega3);
  arrow(P(0,0), omega4);

  font_size("footnotesize");
  label(P(0,0), P(0,-4), "$O$", b);
  label(sz, P(0,-4), "$U$", b);

  font_size("scriptsize");

  label(omega1, dx, "$2\\omega_1$", br);
  label(omega2, dx, "$2\\omega_2$", br);
  label(omega3, dx, "$2\\omega_3$", br);
  label(omega4, dx, "$2\\omega_4$", br);

  tikz_format();
  end();
}