Reference Point -> Anchor Point

-- Set reference point
function _M.setRP (object, ref_point)
    ref_point = string.lower(ref_point)
    if ref_point == 'topleft' then
        object.anchorX, object.anchorY = 0, 0
    elseif ref_point == 'topright' then
        object.anchorX, object.anchorY = 1, 0
    elseif ref_point == 'topcenter' then
        object.anchorX, object.anchorY = 0.5, 0
    elseif ref_point == 'bottomleft' then
        object.anchorX, object.anchorY = 0, 1
    elseif ref_point == 'bottomright' then
        object.anchorX, object.anchorY = 1, 1
    elseif ref_point == 'bottomcenter' then
        object.anchorX, object.anchorY = 0.5, 1
    elseif ref_point == 'centerleft' then
        object.anchorX, object.anchorY = 0, 0.5
    elseif ref_point == 'centerright' then
        object.anchorX, object.anchorY = 1, 0.5
    elseif ref_point == 'center' then
        object.anchorX, object.anchorY = 0.5, 0.5
    end
end