[Vuejs]-Get the Extent of a one center point

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0👍

If you want an extent centered on point [x, y] but also containing the extent [x1, y1, x2, y2] of all other features I think you would need to calculate it

var halfWidth = Math.max(Math.abs(x - x1), Math.abs(x - x2));
var halfHeight = Math.max(Math.abs(y - y1), Math.abs(y - y2));

var extent = [x - halfWidth, y - halfHeight, x + halfWidth, y + halfHeight];

0👍

I think you will get an idea from the source code which was implemented in C# by me.

    public static List<Coordinate> GetExtentFromCenterCoordinate(Coordinate center, double distance_km)
    {
        double hypotenuse_each_quardilator = Math.Sqrt(Math.Pow((distance_km / 2), 2) + Math.Pow((distance_km / 2), 2)); //Hy = Sqrt(L2 + h2)
        double rad_angle = (Math.PI / 180) * 45;
        double distance = hypotenuse_each_quardilator / 100;

        //left-top
        double x1 = center.X - distance * Math.Cos(rad_angle);
        double y1 = center.Y + distance * Math.Sin(rad_angle);
        //right-top
        double x2 = center.X + distance * Math.Cos(rad_angle);
        double y2 = center.Y + distance * Math.Sin(rad_angle);
        //right-bottom
        double x3 = center.X + distance * Math.Cos(rad_angle);
        double y3 = center.Y - distance * Math.Sin(rad_angle);
        //left-bottom
        double x4 = center.X - distance * Math.Cos(rad_angle);
        double y4 = center.Y - distance * Math.Sin(rad_angle);

        List<Coordinate> extent_area = new List<Coordinate>();
        extent_area.Add(new Coordinate(x1, y1));//left-top
        extent_area.Add(new Coordinate(x2, y2));//right-top
        extent_area.Add(new Coordinate(x3, y3));//right-bottom
        extent_area.Add(new Coordinate(x4, y4));//left-bottom

        return extent_area;
    }

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