intersectingRectangle (class Rectangle in LibGdx)

fun Rectangle.intersectingRectangle(r: Rectangle): Rectangle {

    if (!this.overlaps(r)) {
        Rectangle.tmp.set(0f, 0f, 0f, 0f)
        return Rectangle.tmp
    }

    var w = 0f
    var h = 0f
    var x1 = 0f
    var y1 = 0f

    if (r.x > x) {
        x1 = r.x
        w = if (x + width > r.x + r.width) r.width
        else x + width - r.x
    } else {
        x1 = x
        w = if (r.x + r.width > x + width) width
        else r.x + r.width - x
    }

    if (r.y > y) {
        y1 = r.y
        h = if (y + height > r.y + r.height) r.height
        else y + height - r.y
    } else {
        y1 = y
        h = if (r.y + r.height > y + height) height
        else r.y + r.height - y
    }

    Rectangle.tmp.set(x1, y1, w, h)
    return Rectangle.tmp
}