/* -*-ePiX-*- */
/* tori.xp -- May 09, 2005 */
// compile tutorial torus meshes at once
#include "epix.h"
using namespace ePiX;

// torus
P F(double u, double v)
{
  return polar(2.25+Cos(u), v) + P(0,0,Sin(u));
}

int main()
{
  picture(P(0,0), P(4,1), "6 x 1.5in");

  begin();

  domain R(P(0,0), P(1,1), mesh(12,30), mesh(24, 60));

  revolutions();
  camera.at(10,7,5);

  // unclipped/cropped
  screen scr1(P(-3,-3), P(3,3));
  activate(scr1);
  fill(White());
  surface(F, R);
  inset(P(0,0), P(1,1));
  deactivate(scr1);

  // cropped
  screen scr2(P(-3,-3), P(3,3));
  activate(scr2);
  set_crop();
  border();
  surface(F, R);
  inset(P(1.5,0), P(2.5,1));
  deactivate(scr2);

  // clipped
  screen scr3(P(-3,-3), P(3,3));
  activate(scr3);
  clip_box(P(3.5, 2, 1.5));

  // box, sides layered manually
  nofill();
  rect(P(-3.5, -2, -1.5), P(-3.5,  2, 1.5));
  rect(P(-3.5, -2, -1.5), P( 3.5, -2, 1.5));

  fill();
  surface(F, R);
  nofill();
  rect(P( 3.5, -2, -1.5), P( 3.5,  2, 1.5));
  rect(P(-3.5,  2, -1.5), P( 3.5,  2, 1.5));

  inset(P(3,0), P(4,1));
  deactivate(scr3);

  pst_format();
  end();
}