examples/koch.cpp

```/*
* @file   koch.cpp
* @author Sebastien Fourey <http://www.greyc.ensicaen.fr/~seb>
* @date   Tue Aug 21
*
*
* @brief   Draw a random complete graph
*/
#include <cstdlib>
#include <ctime>
#include <iostream>
#include <fstream>
#include <cmath>
#include <vector>
#include <utility>
#include "Board/Board.h"
using namespace std;
using namespace LibBoard;

const int HALF_RAND = RAND_MAX/16;
const double dy = 10;

int coordinate( int width ) {
return 1 + (int) (width * (rand() / (RAND_MAX + 1.0)));
}

void Koch( ShapeList & board, const Color & color,  Point p1, Point p2, int depth ) {
if ( depth <= 0 ) return;

Point v = p2 - p1;
Point a = p1 + ( v / 3.0 );
Point b = p1 + 2 * ( v / 3.0 );
Point c = b.rotated( 60 * Board::Degree, a );

Color col = color;

col.setRGBi( static_cast<unsigned char>( std::floor( col.red() * 0.75 + 0.5 ) ),
static_cast<unsigned char>( std::floor( col.green() * 0.75 + 0.5 ) ),
static_cast<unsigned char>( std::floor( col.blue() * 0.75 + 0.5 ) ) );

board << Triangle( a, c, b, Color::None, color, 0.0 );
Koch( board, col, p1, a, depth-1 );
Koch( board, col, a, c, depth-1 );
Koch( board, col, c, b, depth-1 );
Koch( board, col, b, p2, depth-1 );
}

int main( int , char *[] )
{
Board board;
board.clear( Color(200,255,200) );

Point a( -10, 0 );
Point c( 10, 0 );
Point b = c.rotated( 60 * Board::Degree, a );

Group aux;
Koch( aux, Color::Green, a, b, 5 );
Koch( aux, Color::Green, b, c, 5 );
Koch( aux, Color::Green, c, a, 5 );
aux << Triangle( a, b, c, Color::None, Color::Green, 0 );

board << aux;

int n = 4;
while ( n-- ) {
board.dup().last().scale( 0.5 );
board.last()
.translate( 0.25 * board.last().bbox().width, board.last().bbox().height * 1.5 )
.rotate( -20 * Board::Degree );
}

board << Line( board.bbox().left, board.last().bbox().top - 1,
board.bbox().left + board.bbox().width, board.last().bbox().top - 1,
Color::Blue, 1 );
board << Text( -10, board.last().bbox().top + 0.3, "LibBoard Koch's because LibBoard rocks...",
Fonts::Helvetica, "NeverExists, 'Monotype Corsiva', Verdana, Arial",  24, Color::Blue );
board.dup().last().rotate( -90 * Board::Degree ).translate( 0, -0.5 );

board.saveFIG( "koch.fig", 200, 200 );
board.saveSVG( "koch.svg", 300, 600 );
board.saveEPS( "koch.eps", Board::A4 );
exit(0);
}

```
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