Svg.SvgPathBuilder.Reflect C# (CSharp) Method

        private static PointF Reflect(PointF point, PointF mirror)
        {
            float x, y, dx, dy;
            dx = Math.Abs(mirror.X - point.X);
            dy = Math.Abs(mirror.Y - point.Y);

            if (mirror.X >= point.X)
            {
                x = mirror.X + dx;
            }
            else
            {
                x = mirror.X - dx;
            }
            if (mirror.Y >= point.Y)
            {
                y = mirror.Y + dy;
            }
            else
            {
                y = mirror.Y - dy;
            }

            return new PointF(x, y);
        }