How to draw a sequence of points as a line in OpenCV3? - drawing

Question

I like to draw a sequence of points as a line on OpenCV 3.3. I think I can collect this sequence by vector<Point> although I don't know is this the best idea or not.
Lets consider I have these points vector:
vector<Point> vec = { Point(0,0),Point(10,10),Point(20,20), Point(30,30), Point(40,40), Point(50,50) };
And I like to draw them in an empty Mat as an 100*100 pixel image. So it would be the images diameter. I searched and found the line function, but it has only to "starting and end" points. Should I use many line functions in sequence? There isn't better solution for this?
I tried to do it by writing this code but it thrown in an exception:
#include <opencv2/opencv.hpp>
#include <iostream>
using namespace std;
using namespace cv;
void MyLine(Mat img, Point start, Point end);
Mat im = Mat::zeros(100, 100, CV_8UC1);
Mat img = Mat::zeros(100, 100, CV_8UC1);
vector<Point> vec = { Point(0,0),Point(10,10),Point(20,20), Point(30,30), Point(40,40), Point(50,50) };
int main()
{
Point start= Point(0, 0);
Point end = Point(50, 50);
MyLine(img, start, end);
namedWindow("image", WINDOW_AUTOSIZE);
imshow("image", im);
waitKey(0);
return 0;
}
void MyLine(Mat img, Point start, Point end)
{
int thickness = 2;
int lineType = 8;
for (int i = 0; i < 7; i++)
{
line(img,
vec[i],
vec[i+1],
Scalar(255, 255, 255),
thickness,
lineType);
im += img;
}
}

Answer 1

You can use drawContours(...) function like this:
vector<vector<Point>> contours = {vec};
drawContours(im, contours, -1, Scalar(255, 255, 255), thickness, lineType);