#include<iostream>
#include<opencv2/opencv.hpp>
#include<string>
using namespace std;
using namespace cv;
int main()
{
Mat image(600, 600, CV_8UC3);
RNG& rng = theRNG();//随机数生成器
while (1)
{
char key;//定义输入键的数据类型
int count = (unsigned)rng%100+3; //设计随机产生样本点的个数 对100进行取余加3表示所取点的个数不会超过100 不少于3
vector <Point> points; //设计数据类型为point的动态数组
for (int i = 0; i < count; i++) //设计for循环使得随机产生点的位置
{
Point point;
point.x = rng.uniform(image.cols / 4, image.cols * 3 / 4);
point.y = rng.uniform(image.rows / 4, image.rows * 3 / 4);
points.push_back(point);
}
vector <int> hull; //设计整数型的数组变量
convexHull(Mat(points), hull, true); //转换成mat数据类型也可以不进行转换
image = Scalar::all(0); //设计颜色变量的初始值
for (int i = 0; i < count; i++)
circle(image, points[i], 3, Scalar(rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255)), FILLED, LINE_AA);
//增加样本点的大小使其变的可见 随机颜色变量
int hullcount = (int)hull.size();//取包点的个数
Point point0 = points[hull[hullcount - 1]]; //取出包点的最后一个点收尾相连以此画直线
for (int i = 0; i < hullcount; i++)
{
Point point = points[hull[i]];
line(image, point0, point, Scalar(255, 255, 255), 2, LINE_AA);
point0 = point;
}
imshow("shiliezi", image);
key = (char)waitKey();
if (key == 27 || key == 'q' || key == 'Q')
break;
}
return 1;
}