Create contour in opencv.js

Question

I want to convert a list of points to contours (similar to the contours returned by findContours in opencv.js). I'm thinking something like this:

let points = [[10,10],[100,10],[100,100],[10,100]]
var contours = new cv.MatVector();
for (var i = 0; i < points.length; ++i) {
   contours.push_back(new cv.Mat(points[i][0], points[i][1]))
}

But it is throwing me following error;

TypeError: right-hand side of 'in' should be an object, got number

Answer 1

Didn't understand what where you trying to do with the contours, but googling similar error brought me here.

cv.Mat constractor requires two arguments: the first is cv.Size of the mat, and the type of the cells of the resulting Mat(e,g: cv.CV_8UC1 ).

let points = [[10,10],[100,10],[100,100],[10,100]];
var contours = new cv.MatVector();
for (var i = 0; i < points.length; ++i) {
    contours.push_back(new cv.Mat(points[i][0], points[i][1]),  ));
}