Show EU power values more readable (#424)

Add the EU_string helper function
In comparison to pretty_num it uses SI prefixes, adds "EU" (e.g. kEU) and rounds the number for readability
Add a constant_digit_count boolean setting
This commit is contained in:
HybridDog 2018-07-16 17:26:39 +02:00 committed by SmallJoker
parent 6af0376c23
commit 41f175986d
9 changed files with 72 additions and 30 deletions

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@ -11,9 +11,12 @@ switching station handles the network activity.
Helper functions Helper functions
---------------- ----------------
* `technic.EU_string(num)`
* Converts num to a human-readable string (see pretty_num)
and adds the `EU` unit
* Use this function when showing players energy values
* `technic.pretty_num(num)` * `technic.pretty_num(num)`
* Converts the number `num` to a human-readable string. * Converts the number `num` to a human-readable string with SI prefixes
* Use this function when showing players power values.
* `technic.swap_node(pos, nodename)` * `technic.swap_node(pos, nodename)`
* Same as `mintest.swap_node` but it only changes the nodename. * Same as `mintest.swap_node` but it only changes the nodename.
* It uses `minetest.get_node` before swapping to ensure the new nodename * It uses `minetest.get_node` before swapping to ensure the new nodename

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@ -1,23 +1,56 @@
local digit_sep_esc local constant_digit_count = technic.config:get("constant_digit_count")
do
local sep = technic.config:get("digit_separator") -- converts a number to a readable string with SI prefix, e.g. 10000 → "10 k",
sep = tonumber(sep) and string.char(sep) or sep or " " -- 15 → "15 ", 0.1501 → "150.1 m"
-- Escape for gsub -- a non-breaking space (U+a0) instead of a usual one is put after number
for magic in ("().%+-*?[^$"):gmatch(".") do -- The precision is 4 digits
if sep == magic then local prefixes = {[-8] = "y", [-7] = "z", [-6] = "a", [-5] = "f", [-4] = "p",
sep = "%"..sep [-3] = "n", [-2] = "µ", [-1] = "m", [0] = "", [1] = "k", [2] = "M",
[3] = "G", [4] = "T", [5] = "P", [6] = "E", [7] = "Z", [8] = "Y"}
function technic.pretty_num(num)
-- the small number added is due to floating point inaccuracy
local b = math.floor(math.log10(math.abs(num)) +0.000001)
local pref_i
if b ~= 0 then
-- b is decremented by 1 to avoid a single digit with many decimals,
-- e.g. instead of 1.021 MEU, 1021 kEU is shown
pref_i = math.floor((b - 1) / 3)
else
-- as special case, avoid showing e.g. 1100 mEU instead of 1.1 EU
pref_i = 0
end end
if not prefixes[pref_i] then
-- This happens for 0, nan, inf, very big values, etc.
if num == 0 then
-- handle 0 explicilty to avoid showing "-0"
if not constant_digit_count then
return "0 "
end end
digit_sep_esc = sep -- gives 0.000
return string.format("%.3f ", 0)
end
return string.format("%.4g ", num)
end
num = num * 10 ^ (-3 * pref_i)
if constant_digit_count then
local comma_digits_cnt = 3 - (b - 3 * pref_i)
return string.format("%." .. comma_digits_cnt .. "f %s",
num, prefixes[pref_i])
end
return string.format("%.4g %s", num, prefixes[pref_i])
end end
-- some unittests
assert(technic.pretty_num(-0) == "0 ")
assert(technic.pretty_num(0) == "0 ")
assert(technic.pretty_num(1234) == "1234 ")
assert(technic.pretty_num(123456789) == "123.5 M")
function technic.pretty_num(num)
local str, k = tostring(num), nil -- used to display power values
repeat function technic.EU_string(num)
str, k = str:gsub("^(-?%d+)(%d%d%d)", "%1"..digit_sep_esc.."%2") return technic.pretty_num(num) .. "EU"
until k == 0
return str
end end

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@ -35,7 +35,8 @@ local run = function(pos, node)
local charge_to_give = math.floor((light + pos1.y) * 3) local charge_to_give = math.floor((light + pos1.y) * 3)
charge_to_give = math.max(charge_to_give, 0) charge_to_give = math.max(charge_to_give, 0)
charge_to_give = math.min(charge_to_give, 200) charge_to_give = math.min(charge_to_give, 200)
meta:set_string("infotext", S("@1 Active (@2 EU)", machine_name, technic.pretty_num(charge_to_give))) meta:set_string("infotext", S("@1 Active (@2)", machine_name,
technic.EU_string(charge_to_give)))
meta:set_int("LV_EU_supply", charge_to_give) meta:set_int("LV_EU_supply", charge_to_give)
else else
meta:set_string("infotext", S("%s Idle"):format(machine_name)) meta:set_string("infotext", S("%s Idle"):format(machine_name))

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@ -60,7 +60,8 @@ local run = function(pos, node)
elseif check == true then elseif check == true then
local power = math.min(pos.y * 100, 5000) local power = math.min(pos.y * 100, 5000)
meta:set_int("MV_EU_supply", power) meta:set_int("MV_EU_supply", power)
meta:set_string("infotext", S("@1 (@2 EU)", machine_name, technic.pretty_num(power))) meta:set_string("infotext", S("@1 (@2)", machine_name,
technic.EU_string(power)))
end end
-- check == nil: assume nothing has changed -- check == nil: assume nothing has changed
end end

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@ -55,7 +55,7 @@ minetest.register_abm({
local demand = sw_meta:get_int("demand") local demand = sw_meta:get_int("demand")
meta:set_string("infotext", meta:set_string("infotext",
S("Power Monitor. Supply: @1 Demand: @2", S("Power Monitor. Supply: @1 Demand: @2",
technic.pretty_num(supply), technic.pretty_num(demand))) technic.EU_string(supply), technic.EU_string(demand)))
else else
meta:set_string("infotext",S("Power Monitor Has No Network")) meta:set_string("infotext",S("Power Monitor Has No Network"))
end end

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@ -255,8 +255,9 @@ function technic.register_battery_box(data)
local charge_percent = math.floor(current_charge / max_charge * 100) local charge_percent = math.floor(current_charge / max_charge * 100)
meta:set_string("formspec", formspec..add_on_off_buttons(meta, ltier, charge_percent)) meta:set_string("formspec", formspec..add_on_off_buttons(meta, ltier, charge_percent))
local infotext = S("@1 Battery Box: @2/@3", tier, local infotext = S("@1 Battery Box: @2 / @3", tier,
technic.pretty_num(current_charge), technic.pretty_num(max_charge)) technic.EU_string(current_charge),
technic.EU_string(max_charge))
if eu_input == 0 then if eu_input == 0 then
infotext = S("%s Idle"):format(infotext) infotext = S("%s Idle"):format(infotext)
end end

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@ -30,7 +30,8 @@ function technic.register_solar_array(data)
local charge_to_give = math.floor((light + pos.y) * data.power) local charge_to_give = math.floor((light + pos.y) * data.power)
charge_to_give = math.max(charge_to_give, 0) charge_to_give = math.max(charge_to_give, 0)
charge_to_give = math.min(charge_to_give, data.power * 50) charge_to_give = math.min(charge_to_give, data.power * 50)
meta:set_string("infotext", S("@1 Active (@2 EU)", machine_name, technic.pretty_num(charge_to_give))) meta:set_string("infotext", S("@1 Active (@2)", machine_name,
technic.EU_string(charge_to_give)))
meta:set_int(tier.."_EU_supply", charge_to_give) meta:set_int(tier.."_EU_supply", charge_to_give)
else else
meta:set_string("infotext", S("%s Idle"):format(machine_name)) meta:set_string("infotext", S("%s Idle"):format(machine_name))

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@ -149,7 +149,9 @@ local run = function(pos, node, run_stage)
meta:set_int(from.."_EU_supply", 0) meta:set_int(from.."_EU_supply", 0)
meta:set_int(to.."_EU_demand", 0) meta:set_int(to.."_EU_demand", 0)
meta:set_int(to.."_EU_supply", input * remain) meta:set_int(to.."_EU_supply", input * remain)
meta:set_string("infotext", S("@1 (@2 @3 -> @4 @5)", machine_name, technic.pretty_num(input), from, technic.pretty_num(input * remain), to)) meta:set_string("infotext", S("@1 (@2 @3 -> @4 @5)", machine_name,
technic.EU_string(input), from,
technic.EU_string(input * remain), to))
else else
meta:set_string("infotext", S("%s Has Bad Cabling"):format(machine_name)) meta:set_string("infotext", S("%s Has Bad Cabling"):format(machine_name))
if to then if to then

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@ -361,9 +361,9 @@ minetest.register_abm({
end end
--dprint("Total BA demand:"..BA_eu_demand) --dprint("Total BA demand:"..BA_eu_demand)
meta:set_string("infotext", meta:set_string("infotext", S("@1. Supply: @2 Demand: @3",
S("@1. Supply: @2 Demand: @3", machine_name, technic.EU_string(PR_eu_supply),
machine_name, technic.pretty_num(PR_eu_supply), technic.pretty_num(RE_eu_demand))) technic.EU_string(RE_eu_demand)))
-- If mesecon signal and power supply or demand changed then -- If mesecon signal and power supply or demand changed then
-- send them via digilines. -- send them via digilines.