如何计算点数组列表的质心

Question

我试图分别从ArrayList的点加起来所有x和y coordiantes。

public static ArrayList knots = new ArrayList<Point>();



public Point centroid()  {
        Point center = new Point();
            for(int i=0; i<knots.size(); i++) {
            ????????????????????
        return center;
}

我如何找到质心？

Answer 1

public Point centroid()  {
    double centroidX = 0, centroidY = 0;

        for(Point knot : knots) {
            centroidX += knot.getX();
            centroidY += knot.getY();
        }
    return new Point(centroidX / knots.size(), centroidY / knots.size());
}