unnamed/util.lua

local util = {}

function util.cartToIso(cart)
    local iso = {}
    iso.x = cart.x - cart.y
    iso.y = (cart.x + cart.y) / 2
    return iso
end

function util.isoToCart(iso)
    local cart = {}
    cart.x = (2 * iso.y + iso.x) / 2
    cart.y = (2 * iso.y - iso.x) / 2
    return cart
end

return util