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worldedit = worldedit or {}
local minetest = minetest --local copy of global
--modifies positions `pos1` and `pos2` so that each component of `pos1` is less than or equal to its corresponding conent of `pos2`, returning two new positions
worldedit.sort_pos = function(pos1, pos2)
pos1 = {x=pos1.x, y=pos1.y, z=pos1.z}
pos2 = {x=pos2.x, y=pos2.y, z=pos2.z}
if pos1.x > pos2.x then
pos2.x, pos1.x = pos1.x, pos2.x
end
if pos1.y > pos2.y then
pos2.y, pos1.y = pos1.y, pos2.y
end
if pos1.z > pos2.z then
pos2.z, pos1.z = pos1.z, pos2.z
end
return pos1, pos2
end
--executes `code` as a Lua chunk in the global namespace, returning an error if the code fails or nil otherwise
worldedit.lua = function(code)
local operation, message = loadstring(code)
if operation == nil then --code parsing failed
return message
end
local status, message = pcall(operation)
if status == nil then --operation failed
return message
end
return nil
end
--executes `code` as a Lua chunk in the global namespace with the variable pos available, for each node in a region defined by positions `pos1` and `pos2`, returning an error if the code fails or nil otherwise
worldedit.luatransform = function(pos1, pos2, code)
local pos1, pos2 = worldedit.sort_pos(pos1, pos2)
local factory, message = loadstring("return function(pos) " .. code .. " end")
if factory == nil then --code parsing failed
return message
end
local operation = factory()
--make area stay loaded
local manip = minetest.get_voxel_manip()
manip:read_from_map(pos1, pos2)
local pos = {x=pos1.x, y=0, z=0}
while pos.x <= pos2.x do
pos.y = pos1.y
while pos.y <= pos2.y do
pos.z = pos1.z
while pos.z <= pos2.z do
local status, message = pcall(operation, pos)
if status == nil then --operation failed
return message
end
pos.z = pos.z + 1
end
pos.y = pos.y + 1
end
pos.x = pos.x + 1
end
return nil
end
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