Minetest-WorldEditAdditions/worldeditadditions/lib/hollow.lua

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local wea_c = worldeditadditions_core
local Vector3 = wea_c.Vector3
---
-- @module worldeditadditions
-- ██ ██ ██████ ██ ██ ██████ ██ ██
-- ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
-- ███████ ██ ██ ██ ██ ██ ██ ██ █ ██
-- ██ ██ ██ ██ ██ ██ ██ ██ ██ ███ ██
-- ██ ██ ██████ ███████ ███████ ██████ ███ ███
--- Hollows out the defined region, leaving a given number of nodes on the
-- outside.
-- (think of the bits of the outermost parts of the defined region as the
-- 'walls' to a box)
function worldeditadditions.hollow(pos1, pos2, wall_thickness)
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pos1, pos2 = Vector3.sort(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()
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local node_id_ignore = minetest.get_content_id("ignore")
local node_id_air = minetest.get_content_id("air")
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-- minetest.log("action", "pos1: " ..pos1)
-- minetest.log("action", "pos2: " .. pos2)
local changes = { replaced = 0 }
for z = pos2.z - wall_thickness, pos1.z + wall_thickness, -1 do
for y = pos2.y - wall_thickness, pos1.y + wall_thickness, -1 do
for x = pos2.x - wall_thickness, pos1.x + wall_thickness, -1 do
local i = area:index(x, y, z)
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local is_air = wea_c.is_airlike(data[i])
local is_ignore = data[i] == node_id_ignore
if not is_ignore and not is_air then
data[i] = node_id_air
changes.replaced = changes.replaced + 1
end
end
end
end
-- Save the modified nodes back to disk & return
worldedit.manip_helpers.finish(manip, data)
return true, changes
end