Minetest-WorldEditAdditions/worldeditadditions/lib/line.lua
2021-01-16 18:36:17 +00:00

52 lines
1.9 KiB
Lua

--- Counts the nodes in a given area.
-- @module worldeditadditions.count
-- ██ ██ ███ ██ ███████
-- ██ ██ ████ ██ ██
-- ██ ██ ██ ██ ██ █████
-- ██ ██ ██ ██ ██ ██
-- ███████ ██ ██ ████ ███████
function worldeditadditions.line(pos1, pos2, thickness, node_name)
local pos1_sorted, pos2_sorted = worldedit.sort_pos(pos1, pos2)
-- pos2 will always have the highest co-ordinates now
pos1 = vector.new(pos1)
pos2 = vector.new(pos2)
local node_id_replace = minetest.get_content_id(node_name)
print("thickness", thickness, "node_name", node_name, "node_id_replace", node_id_replace)
-- 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 = { replaced = 0 }
for z = pos2_sorted.z, pos1_sorted.z, -1 do
for x = pos2_sorted.x, pos1_sorted.x, -1 do
for y = pos2_sorted.y, pos1_sorted.y, -1 do
local here = vector.new(x, y, z)
local D = vector.normalize(
vector.subtract(pos2, pos1)
)
local d = vector.dot(vector.subtract(here, pos1), D)
local closest_on_line = vector.add(
pos1,
vector.multiply(D, d)
)
local distance = vector.length(vector.subtract(here, closest_on_line))
if distance < thickness then
print("[line] vector", closest_on_line.x, closest_on_line.y, closest_on_line.z, "length", distance)
data[area:index(x, y, z)] = node_id_replace
counts.replaced = counts.replaced + 1
end
end
end
end
-- Save the modified nodes back to disk & return
worldedit.manip_helpers.finish(manip, data)
return true, counts
end