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

double ma(1.5), mb(0.875), rad(0.625), th(22.5);

P ctr(ma, mb);

int main()
{
  picture(P(0,0), P(2.5,2), "2.5 x 2in");

  begin();
  degrees();

  cme_bold();
  P Q(ctr + polar(rad, th));

  cme_dashed();
  line(P(ma,0), P(ma, mb + rad));
  line(ctr, ctr&E_2);

  line(Q, Q&E_1);
  line(Q, Q&E_2);
  cme_solid();

  brace(P(0,mb), P(0,0), "$b$");
  brace(P(0,0), P(ma,0), "$a$");

  brace(Q&E_1, P(0,0), "$x$");
  brace(Q&E_1, Q, "$y$");

  label(ctr, P(-2,-2), "$C$", bl);

  label_angle(th);
  masklabel(ctr + polar(0.5*rad, th), P(0,0), "$r$", t);

  circle(ctr, rad);
  triangle(ctr, P(Q.x1(), mb), Q);

  label_angle(0);
  axis_labels();
  axes();
  caption("Fig.~29.");
  tikz_format();
  end();
}