Consider max_items in complex drop analysis

This commit is contained in:
Wuzzy 2016-08-07 05:44:36 +02:00
parent 1c5fcd18ca
commit af56ddf06b

34
api.lua

@ -56,25 +56,53 @@ minetest.after(0.01, function()
})
end
-- Complex drops
-- Complex drops. Yes, it's really complex!
elseif type(def.drop) == "table" then
--[[ Extract single items from the table and save them into dedicated tables
to register them later, in order to avoid duplicates ]]
to register them later, in order to avoid duplicates. These tables counts
the total number of guaranteed drops and drops by chance (maybes) for each item.
For maybes, the final count is the theoretical maximum number of items, not
neccessarily the actual drop count. ]]
local drop_guaranteed = {}
local drop_maybe = {}
-- This is for catching an obscure corner case: If the top items table has
-- only items with rarity = 1, but max_items is set, then only the first
-- max_items will be part of the drop, any later entries are logically
-- impossible, so this variable is for keeping track of this
local max_items_left = def.drop.max_items
-- For checking whether we still encountered only guaranteed only so far;
-- for the first “maybe” item it will become false which will cause ALL
-- later items to be considered “maybes”.
-- A common idiom is:
-- { max_items 1, { items = {
-- { items={"example:1"}, rarity = 5 },
-- { items={"example:2"}, rarity = 1 }, }}}
-- example:2 must be considered a “maybe” because max_items is set and it
-- appears after a “maybe”
local max_start = true
-- Let's iterate through the items madness!
for i=1,#def.drop.items do
if max_items_left ~= nil and max_items_left <= 0 then break end
local itit = def.drop.items[i]
for j=1,#itit.items do
local dstack = ItemStack(itit.items[j])
if not dstack:is_empty() and dstack:get_name() ~= name then
local dname = dstack:get_name()
local dcount = dstack:get_count()
if #itit.items == 1 and itit.rarity == 1 then
-- Guaranteed drops AND we are not yet in “maybe mode”
if #itit.items == 1 and itit.rarity == 1 and max_start then
if drop_guaranteed[dname] == nil then
drop_guaranteed[dname] = 0
end
drop_guaranteed[dname] = drop_guaranteed[dname] + dcount
if max_items_left ~= nil then
max_items_left = max_items_left - 1
if max_items_left <= 0 then break end
end
-- Drop was a “maybe”
else
if max_items_left ~= nil then max_start = false end
if drop_maybe[dname] == nil then
drop_maybe[dname] = 0
end