examples/arrows.cpp

#include <cstdlib>
#include <ctime>
#include <iostream>
#include <fstream>
#include <cmath>
#include <sstream>
#include <string>
#include "Board.h"
using namespace LibBoard;

#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif

float  random_gray() {
  return rand() / static_cast<float>(RAND_MAX);
}

int main( int , char *[] )
{
  Board board;
  board.clear( Color(233,250,140) );
  board.setLineWidth(0.25);
  srand( static_cast<unsigned int>( time(0) ) );
  double angle = 0.0;

  board << Rectangle( -8, 12, 16, 24, Color::Black, Color::Null, 0.1 );

  double radius = 10;

  board.setFont( Fonts::CourierBold, 2 );
  for ( int i = 0; i < 45; ++i ) {
    angle = i * (2*M_PI/45);

    board.setPenColorRGBf( random_gray(), random_gray(), random_gray() );
    board.setFillColor( board.penColor() );
    board.drawArrow( 0, 0, radius * cos( angle ), radius * sin( angle ) );
    radius += 0.4;

    board.setLineWidth( 0.1 );
    board.setPenColorRGBi( 255, 0, 0);
    board.drawDot( radius * cos( angle ), radius * sin( angle ) );
    std::stringstream s;
    s << i;
    board.drawText( radius * cos( angle ), radius * sin( angle ), s.str() );
  }
  
  board.setPenColorRGBi( 0, 0, 0 );
  board.setFont( Fonts::PalatinoRoman, 24 );
  board.drawText( 0, 15, "Arrows" );

  board << Rectangle(board.boundingBox(Shape::IgnoreLineWidth));

  Rect rect = board.last<Rectangle>().boundingBox(Shape::UseLineWidth);
  board.setPenColor(Color::Red);
  board.setFillColor(Color::Green);
  board.setLineWidth(1);
  board.drawArrow(rect.topLeft(),rect.bottomRight());


  Rect rect2(10,90,40,40);
  board.drawArrow(rect2.topLeft(),rect2.topRight());
  board.drawArrow(rect2.topRight(),rect2.bottomRight());
  board.drawArrow(rect2.bottomRight(),rect2.bottomLeft());
  board.drawArrow(rect2.bottomLeft(),rect2.topLeft());

  // board.saveEPS( "arrows_A4.eps", Board::A4, 2.0, Board::UCentimeter );
  // board.saveSVG( "arrows_A4.svg", Board::A4 );
  // board.saveFIG( "arrows.fig" );

  board.scaleToWidth(20,Board::UseLineWidth);
  board.saveSVG( "arrows.svg", Board::BoundingBox, 0.0, Board::UCentimeter);
}