examples/holes.cpp

 
#include <cstdlib>
#include <ctime>
#include <set>
#include <vector>
#include "Board.h"
using namespace LibBoard;
 
int main(int, char *[])
{
  Board board;
  Board::enableLineWidthScaling();
  board.clear(Color::White);
 
  srand(static_cast<unsigned int>(time(nullptr)));
 
  Path pA(Path::ClosedPath);
  pA << Point(0, 0) << Point(180, 0) << Point(180, 300) << Point(0, 300);
  Path pB(Path::ClosedPath);
  pB << Point(0, 0) << Point(200, 0) << Point(500, 5) << Point(150, 200);
 
  Path losange;
  losange.close();
  losange << Point(0, 0) << Point(300, -500) << Point(600, 0) << Point(300, 500);
 
  board << Line(-50, 0, 650, 0, Color::Red);
  board << Line(-50, 300, 650, -300, Color::Red);
  board << board.last<Line>();
  board.last<Line>().rotate(90 * Board::Degree);
  Polyline p(losange, Style::defaultPenColor(), Color::Green);
  losange.scale(0.5);
  p.addHole(losange);
  board << p;
 
  board.rotate(45 * Board::Degree);
 
  board.append(board.last<Polyline>(), Board::Right, Board::AlignCenter);
 
  Polyline square(Path::ClosedPath, Color::Black, Color(70, 70, 130), 0.1);
  square << Point(-110, 110) << Point(110, 110) << Point(110, -110) << Point(-110, -110);
  int n = 80;
  std::set<std::pair<int, int>> holes;
  while (n--) {
    holes.insert(std::make_pair((int)(rand() % 20) - 10, (int)(rand() % 20) - 10));
  }
  std::set<std::pair<int, int>>::iterator it = holes.begin();
  while (it != holes.end()) {
    Path hole;
    Point p(it->first * 10, it->second * 10);
    hole << Point(p.x - 5, p.y + 5) << Point(p.x + 5, p.y + 5) << Point(p.x + 5, p.y - 5) << Point(p.x - 5, p.y - 5);
    square.addHole(hole);
    ++it;
  }
  board << square.scaled(3).translated(1000, 0).rotated(45 * Board::Degree);
 
  //  board << Polyline(losange,Shape::defaultPenColor(),Color::White);
 
  board.saveEPS("holes.eps", Board::A4);
  board.scaleToWidth(25, UseLineWidth);
  board.saveSVG("holes.svg", Board::BoundingBox, 0.0, Board::UCentimeter);
}