Minetest-WorldEditAdditions/worldeditadditions/lib/count.lua
2021-01-31 17:43:08 +00:00

50 lines
1.7 KiB
Lua

--- Counts the nodes in a given area.
-- @module worldeditadditions.count
-- ██████ ██████ ██ ██ ███ ██ ████████
-- ██ ██ ██ ██ ██ ████ ██ ██
-- ██ ██ ██ ██ ██ ██ ██ ██ ██
-- ██ ██ ██ ██ ██ ██ ██ ██ ██
-- ██████ ██████ ██████ ██ ████ ██
function worldeditadditions.count(pos1, pos2, do_human_counts)
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()
-- z y x is the preferred loop order (because CPU cache I'd guess, since then we're iterating linearly through the data array)
local counts = {}
for i in area:iterp(pos1, pos2) do
if not counts[data[i]] then
counts[data[i]] = 0
end
counts[data[i]] = counts[data[i]] + 1
end
local total = worldedit.volume(pos1, pos2)
local results = {}
for node_name, count in pairs(counts) do
table.insert(results, {
count,
tostring(worldeditadditions.round((count / total) * 100, 2)).."%",
minetest.get_name_from_content_id(node_name)
})
end
table.sort(results, function(a, b) return a[1] < b[1] end)
if do_human_counts then
for key,item in pairs(results) do
item[1] = worldeditadditions.human_size(item[1], 2)
end
end
-- Save the modified nodes back to disk & return
-- No need to save - this function doesn't actually change anything
-- worldedit.manip_helpers.finish(manip, data)
return true, results, total
end