/* -*- C++ -*-

  *

  * This file is a part of LEMON, a generic C++ optimization library

  *

  * Copyright (C) 2003-2006

  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

  * (Egervary Research Group on Combinatorial Optimization, EGRES).

  *

  * Permission to use, modify and distribute this software is granted

  * provided that this copyright notice appears in all copies. For

  * precise terms see the accompanying LICENSE file.

  *

  * This software is provided "AS IS" with no warranty of any kind,

  * express or implied, and with no claim as to its suitability for any

  * purpose.

  *

  */

 /// \ingroup demos

 /// \file

 /// \brief Demo of the EPS grawing class \ref EpsDrawer()

 ///

 /// This demo program shows examples how to use the class \ref

 /// EpsDrawer(). It takes no input but simply creates a file

 /// <tt>eps_demo.eps</tt> demonstrating the capability of \ref

 /// EpsDrawer().

 ///

 /// \include eps_demo.cc

 #include <cmath>

 #include <lemon/eps.h>

 using namespace lemon;

 void kosar(EpsDrawer &ed)

 {

   double d,r;

   r = sqrt(2);

   ed.save();

   ed.translate(256,256).scale(256,256);

   ed.lineWidth(1/256);

   ed.collect();

   ed.moveTo(0,1);

   for(d=0;d<M_PI*2*5;d+=.1)

     {

       ed.lineTo(sin(d*3),cos(d*5));

     }

   ed.stroke();

   ed.restore();

 }

 void fonts(EpsDrawer &ed)

 {

   ed.save().centerMode(true);

   ed.font("Helvetica").fontSize(90);

   ed.moveTo(256,512/3*2+50) << "Helvetica";

   ed.font("Courier");

   ed.moveTo(256,512/3+50) << "Courier" ;

   ed.font("Times-Roman");

   ed.moveTo(256,50) << "Times-Roman";

   ed.centerMode(false).restore();

 }

 int main()

 {

   EpsDrawer ed("eps_demo.eps",512,512);

   ed.scale(1,1);

   ed.color(0,0,0).collect();

   ed.moveTo(0,0).lineTo(0,512).lineTo(512,512).lineTo(512,0).closePath().fill();

   ed.lineWidth(4);

   for(double r=0;r<=256;r+=2)

     {

       ed.color(r/256.0,0,1-r/256.0).circle(256,256,r);

     }

   ed.save();

   ed.color(0,0,0);

   ed.translate(256,256);

   for(int i=0;i<18;i++)

     {

       ed.rotate(20);

       for(double r=0;r<=256;r+=20)

 	ed.fontSize(r/10+1).rotate(2).moveTo(0,r) << r;

       ed.rotate(-26);

     }

   ed.restore();

   fonts(ed.color(.7,.7,.7));

   ed.color(0,1,0);

   kosar(ed);

 }