Minetest-WorldEditAdditions/worldeditadditions/lib/replacemix.lua

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2020-05-14 20:37:27 +00:00
--- Like //mix, but replaces a given node instead.
-- @module worldeditadditions.replacemix
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-- ██ ██ ███████ ██ ███████ ██ ██ ██████ ███████ ██ ██ ██ ██ ██
function worldeditadditions.replacemix(pos1, pos2, target_node, target_node_chance, replacements)
pos1, pos2 = worldedit.sort_pos(pos1, pos2)
-- pos2 will always have the highest co-ordinates now
-- Fetch the nodes in the specified area
local manip, area = worldedit.manip_helpers.init(pos1, pos2)
local data = manip:get_data()
local node_id_target = minetest.get_content_id(target_node)
-- Initialise statistics
local changed = 0
local candidates = 0
local distribution = {}
-- Generate the list of node ids
local node_ids_replace = {}
for node_name, weight in pairs(replacements) do
local next_id = minetest.get_content_id(node_name)
for i = 1, weight do
table.insert(
node_ids_replace,
next_id
)
end
distribution[next_id] = 0
end
local node_ids_replace_count = #node_ids_replace
for i in area:iterp(pos1, pos2) do
if data[i] == node_id_target then
candidates = candidates + 1
if math.random(target_node_chance) == 1 then
local next_id = node_ids_replace[math.random(node_ids_replace_count)]
data[i] = next_id
changed = changed + 1
-- We initialised this above
distribution[next_id] = distribution[next_id] + 1
end
end
end
-- Save the modified nodes back to disk & return
worldedit.manip_helpers.finish(manip, data)
return true, changed, candidates, distribution
end