#include <opencv2/opencv.hpp>
#include <iostream>
#include <math.h>
using namespace cv;
using namespace std;

//线
void MyLines(Mat &bgImage)
{
    Point p1 = Point(20, 30);
    Point p2;
    p2.x = 300;
    p2.y = 300;
    Scalar color = Scalar(0, 0, 255);
    //抗锯齿
    line(bgImage, p1, p2, color, 6, LINE_AA);

    putText(bgImage, "test", Point(300, 300), CV_FONT_HERSHEY_COMPLEX, 2.0, Scalar(255, 0, 0),3,8);
}

//矩形
void MyRectangle(Mat& bgImage)
{
    Rect rect = Rect(510, 30, 60, 60);
    Scalar color = Scalar(0, 255, 0);
    //抗锯齿
    rectangle(bgImage, rect, color,2, LINE_AA); 
}

//椭圆
void MyEllipse(Mat& bgImag)
{
    Scalar color = Scalar(0, 255, 0);
    //顺时针旋转45度,从0度画到360度
    ellipse(bgImag, Point(bgImag.cols / 2, bgImag.rows / 2), Size(bgImag.cols / 4, bgImag.rows / 8),45, 0, 360, color, 2, LINE_4);
}

//圆
void MyCircle(Mat& bgImag)
{
    Scalar color = Scalar(255, 0, 0);
    Point center = Point(bgImag.cols / 2, bgImag.rows / 2);
    circle(bgImag, center, 150, color, 2);
}

//多边形
void MyPolygon(Mat& bgImag)
{
    Point pts[2][5];
    pts[0][0] = Point(100, 100);
    pts[0][1] = Point(100, 300);
    pts[0][2] = Point(200, 200);
    pts[0][3] = Point(200, 100);
    pts[0][4] = Point(100, 100);

    pts[1][0] = Point(0, 100);
    pts[1][1] = Point(50, 300);
    pts[1][2] = Point(0, 200);
    pts[1][3] = Point(0, 100);
    pts[1][4] = Point(0, 100);


    //行指针 Point(*ppts)[]
    //元素指针
    const Point* ppts[2];
    ppts[0] = pts[0];
    ppts[1] = pts[1];
    int npt[2];
    npt[0] = 5;
    npt[1] = 5;
    Scalar color = Scalar(255, 12, 255);

    fillPoly(bgImag, ppts, npt, 1, color, 8);
    //fillPoly(bgImag, &ppts[1], npt, 1, color, 8);
}

//随机画线
void randomLine(Mat& bgImag)
{
    RNG rng(12345);
    Point pt1;
    Point pt2;
    Mat bg = Mat::zeros(bgImag.size(), bgImag.type());
    namedWindow("随机画线", CV_WINDOW_AUTOSIZE);
    while (1)
    {
        pt1.x = rng.uniform(0, bgImag.cols);
        pt2.x = rng.uniform(0, bgImag.cols);

        pt1.y = rng.uniform(0, bgImag.rows);
        pt2.y = rng.uniform(0, bgImag.rows);

        Scalar color = Scalar(rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255));

        if (waitKey(50) > 0)
        {
            break;
        }

        line(bg, pt1, pt2, color, 1, 8);
        imshow("随机线条", bg);
    }
}

int main()
{
    Mat src,dst;
    //原图
    src = imread(".//pic//kate.png",IMREAD_UNCHANGED);
    
    if (!src.data)
    {
        cout << "load error" << endl;
        return -1;
    }
    /*MyLines(src);
    MyRectangle(src);
    MyEllipse(src);
    MyCircle(src);
    MyPolygon(src);*/
    randomLine(src);

    namedWindow("demo", CV_WINDOW_AUTOSIZE);
    imshow("line", src);

    waitKey(0);
    return 0;
}