opencv draw basic geometric shapes and text

#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);
    // antialiasing 
    Rectangle (bgImage, RECT, Color, 2 , LINE_AA); 
} 

// elliptical 
void MyEllipse (Mat & bgImag) 
{ 
    the Scalar Color = the Scalar ( 0 , 255 , 0 );
     // rotated 45 degrees clockwise from 0 Videos degrees to 360 degrees 
    Ellipse (bgImag, Point (bgImag.cols / 2 , bgImag.rows / 2 ), Size (bgImag.cols / . 4 , bgImag.rows / . 8 ), 45 , 0 , 360 , Color, 2 , LINE_4 ); 
} 

// round 
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 is ); 
    PTS [ . 1 ] [ . 3 ] Point = ( 0 , 100 ); 
    PTS [ . 1 ] [ . 4 ] Point = ( 0 , 100 ); 


    // OK pointer Point (* PPTS) []
     // element pointer 
    const Point * PPTS [ 2 ]; 
    PPTS [ 0 ] = PTS [ 0 ]; 
    PPTS [ . 1 ] = PTS [ . 1 ];
     int NPT [ 2 ];
    NPT [ 0 ] = . 5 ; 
    NPT [ . 1 ] = . 5 ; 
    the Scalar Color = the Scalar ( 255 , 12 is , 255 ); 

    fillPoly (bgImag, PPTS, NPT, . 1 , Color, . 8 );
     // fillPoly (bgImag, & PPTS [. 1 ], NPT,. 1, Color,. 8); 
} 

// random objects 
void randomLine (Mat & bgImag) 
{ 
    the RNG RNG ( 12345 ); 
    Point PT1; 
    Point PT2; 
    Mat BG =  Mat::zeros(bgImag.size(), bgImag.type());
    namedWindow ( " random line drawing ", 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;
}