Minetest-WorldEditAdditions/worldeditadditions/lib/count.lua

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2020-05-11 23:38:42 +00:00
--- Counts the nodes in a given area.
-- @module worldeditadditions.count
-- ██████ ██████ ██ ██ ███ ██ ████████
-- ██ ██ ██ ██ ██ ████ ██ ██
-- ██ ██ ██ ██ ██ ██ ██ ██ ██
-- ██ ██ ██ ██ ██ ██ ██ ██ ██
-- ██████ ██████ ██████ ██ ████ ██
function worldeditadditions.count(pos1, pos2)
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 z = pos2.z, pos1.z, -1 do
for y = pos2.y, pos1.y, -1 do
for x = pos2.x, pos1.x, -1 do
local next = data[area:index(x, y, z)]
if not counts[next] then
counts[next] = 0
end
counts[next] = counts[next] + 1
end
end
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)
-- 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