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

const P LdY(0, 4);
const P LdX(4, 0);

std::string sfmt(const std::string& msg)
{
#ifdef SANSSERIF
  return "$\\mathsf{"+msg+"}$";
#else
  return "$"+msg+"$";
#endif
}

const double th(M_PI/6);
const double rad(0.1);

int main()
{
  picture(P(-1, -1), P(1,1), "2 x 2in");

  begin();

  P ptE(0,0), ptM(0, 1), ptMp(cis(M_PI_2-th)), ptT(Tan(th), 1);

  circle(ptE, rad);
  circle(ptE, 1);

  triangle(ptE, ptM, ptT);

  label(ptE, -2.5*LdY, sfmt("E"), b);

  label(ptM,  LdY, sfmt("M"), t);
  label(ptT,  LdY, sfmt("T"), t);

  label(ptMp, LdX, sfmt("M'"), r);

  tikz_format();
  end();
}