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Support root=cube and root=int in [set_variable]

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(cherry-picked from commit 7a3d6f958a)
This commit is contained in:
Celtic Minstrel 2018-03-30 17:12:08 -04:00
parent 12ada04b8f
commit b35a7f7352
1 changed files with 20 additions and 3 deletions
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23
data/lua/wml/set_variable.lua
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@ -52,11 +52,28 @@ function wesnoth.wml_actions.set_variable(cfg)
end
if cfg.root then
local root = tonumber(cfg.root)
local root_fcn
if cfg.root == "square" then
local radicand = tonumber(wesnoth.get_variable(name)) or 0
if radicand < 0 then helper.wml_error("square root of negative number on variable " .. name) end
wesnoth.set_variable(name, math.sqrt(radicand))
root = 2
root_fcn = math.sqrt
else
if cfg.root == "cube" then
root = 3
end
root_fcn = function(n) return n ^ (1 / root) end
end
local radicand = tonumber(wesnoth.get_variable(name)) or 0
if radicand < 0 and root % 2 == 0 then
if root == 2 then
helper.wml_error("square root of negative number on variable " .. name)
else
helper.wml_error(string.format("%dth root of negative number on variable %s", root, name))
end
end
wesnoth.set_variable(name, root_fcn(radicand))
end
if cfg.power then