Minetest-WorldEdit/worldedit/code.lua
ShadowNinja bb8456b711 Cleanup and fixup
Non-stylistic changes:
  * Add LuaDoc/LDoc support.
  * Fix `clear_objects` area size calculation.
  * Fix `clear_objects` removing player objects.
  * Fix shadowing of marker entity name with player name.
  * Make visualization functions use `swap_node`.
  * Make hidden nodes unwalkable.
  * Prevent `hide` from hiding air.
  * Make deprecated functions log to deprecated stream when called.
  * Fixed `replaceinverse` not using normalized node names.
  * Added .gitignore.
  * Bump version to 1.1.

Stylistic changes:
  * Change `x = function` to `function x`.
  * Change comment format.
  * Make  missing VoxelManip error less obnoxious.
  * Move `sort_pos` into `common.lua`, which is a required module.
  * Remove local copies of `minetest`.
  * Remove `worldedit = worldedit or {}` from modules.
  * Replace replaceinverse with an inverse argument to `replace`.
  * Added `error()`s on on invalid axes.
  * Change `wip` to `TODO`.
  * Rename `clearobjects` to `clear_objects`.
  * Remove `hollow_{sphere,dome,cylinder}` and replace them with a hollow parameter to each function.
  * Add helpers to reduce code duplication.
  * Renamed `Chat Commands.md` to `ChatCommands.md`.
2015-02-01 15:56:16 -05:00

53 lines
1.3 KiB
Lua

--- Lua code execution functions.
-- @module worldedit.code
--- Executes `code` as a Lua chunk in the global namespace.
-- @return An error message if the code fails, or nil on success.
function worldedit.lua(code)
local func, err = loadstring(code)
if not func then -- Syntax error
return err
end
local good, err = pcall(func)
if not good then -- Runtime error
return err
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`.
-- @return An error message if the code fails, or nil on success.
function worldedit.luatransform(pos1, pos2, code)
pos1, pos2 = worldedit.sort_pos(pos1, pos2)
local factory, err = loadstring("return function(pos) " .. code .. " end")
if not factory then -- Syntax error
return err
end
local func = factory()
worldedit.keep_loaded(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 good, err = pcall(func, pos)
if not good then -- Runtime error
return err
end
pos.z = pos.z + 1
end
pos.y = pos.y + 1
end
pos.x = pos.x + 1
end
return nil
end