#include <iostream>
#include <math.h>
#include <opencv2/opencv.hpp>
#include<opencv2/highgui.hpp>
#include <opencv2/highgui/highgui_c.h>  
using namespace std;
using namespace cv;
int main() {
  Mat src, gray_src, drawImg, bin_output;
  src = imread("./shape.png");
  namedWindow("input", CV_WINDOW_AUTOSIZE);
  namedWindow("output", CV_WINDOW_AUTOSIZE);
  imshow("input", src);
  cvtColor(src, gray_src, CV_BGR2GRAY);   // 灰度图
  blur(gray_src, gray_src, Size(10, 10), Point(-1, -1), BORDER_DEFAULT);
  //这些个类型
  vector<vector<Point>> contours;   // 存轮廓
  vector<Vec4i> hierarchy;      // 轮廓关系向量
  threshold(gray_src, bin_output, 144, 255, 0);                         // 二值化
  findContours(bin_output, contours, hierarchy, RETR_TREE, CHAIN_APPROX_SIMPLE, Point(0, 0));   // 找轮廓
  //这些个类型
  vector<vector<Point>> contours_poly(contours.size());
  vector<Rect> poly_rects(contours.size());
  vector<RotatedRect> minRect(contours.size());
  //取点
  for (size_t i = 0; i < contours.size(); i++)
  {
    approxPolyDP(Mat(contours[i]), contours_poly[i], 3, true); //减少轮廓点数
    poly_rects[i] = boundingRect(contours_poly[i]);//获取绘制矩形数据
    if (contours_poly[i].size() > 5) {
      minRect[i] = minAreaRect(contours_poly[i]);//获取绘制旋转矩形数据
    }
  }
  // 开始绘制
  src.copyTo(drawImg);
  Point2f pst[4];         // 储存单个旋转矩形的四个点
  cout << "----------Point2f pst[4]：输出每个旋转矩形的四个点坐标------------" << endl;
  for (size_t i = 0; i < contours.size(); i++)
  {
    rectangle(drawImg, poly_rects[i], Scalar(255, 0, 0), 2, 8);//绘制矩形框
    minRect[i].points(pst);//用线段画矩形，将RotatedRect类型转化为四个点  
    for (size_t u = 0; u < 4; u++)
    {
      line(drawImg, pst[u], pst[(u + 1) % 4], Scalar(0, 255, 0), 2, 8);
      cout << pst[u];     // 显示pst的数据
    }
    cout << endl;
    Rect brect = minRect[i].boundingRect(); //返回包含旋转矩形的最小矩形  
    rectangle(drawImg, brect, Scalar(0, 0, 255));
  }
  cout << endl;
  imshow("output", drawImg);
  cout << "----------vector<vector<Point>> contours_poly：------------" << endl;
  for (size_t i = 0; i < contours_poly.size(); i++)
  {
    cout << "第" << i << "行：";
    for (size_t j = 0; j < contours_poly[i].size(); j++)
    {
      cout << contours_poly[i][j];
    }
    cout << endl;
  }
  cout << endl;
  cout << "----------vector<Vec4i> hierarchy：输出轮廓间关系------------" << endl;
  for (size_t i = 0; i < hierarchy.size(); i++)
  {
    cout << hierarchy[i] << endl;
  }
  cout << endl;
  cout << "----------vector<Rect> poly_rects------------" << endl;
  for (size_t i = 0; i < poly_rects.size(); i++)
  {
    cout << poly_rects[i] << endl;
  }
  cout << endl;
  cout << "---------vector<RotatedRect> minRect------------" << endl;
  for (size_t i = 0; i < minRect.size(); i++) //显示一下点minRect
  {
    cout << "angle:" << minRect[i].angle << " center:" << minRect[i].center << " size:" << minRect[i].size << endl;
  }
  cout << endl;
  waitKey(0);
  return 0;
}