private void addArc(Path path, PointF p0, PointF p1, float weight) {
            path.reset();
            path.moveTo(p0.x, p0.y);

            float x = (p1.x + p0.x) / 2 + weight * (p0.y - p1.y);
            float y = (p1.y + p0.y) / 2 + weight * (p1.x - p0.x);

            path.quadTo(x, y, p1.x, p1.y);
        }