Merge branch 'master'

.editorconfig

@@ -0,0 +1,9 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true

.gitignore

@@ -1,2 +1 @@
-.*
-!.gitignore
+build/

.vscode/settings.json

@@ -0,0 +1,12 @@
+{
+  "Lua.diagnostics.globals": [
+    "_bllua_ts",
+    "_bllua_requiresecure",
+    "_bllua_on_unload"
+  ],
+  "Lua.runtime.version": "Lua 5.1",
+  "Lua.diagnostics.disable": [
+    "lowercase-global",
+    "undefined-global"
+  ]
+}

compile.bat

@@ -0,0 +1,13 @@
+@echo off
+cd /d %~dp0
+
+set "PATH=C:\msys64\mingw32\bin;%PATH%"
+
+if not exist build mkdir build
+
+set buildargs=-Wall -Werror -m32 -shared -Isrc -Iinc/tsfuncs -Iinc/lua -lpsapi -L. -llua5.1 -static-libgcc -static-libstdc++
+
+echo on
+g++ src/bllua4.cpp %buildargs% -o build\BlockLua.dll
+g++ -DBLLUA_UNSAFE src/bllua4.cpp %buildargs% -o build\BlockLua-Unsafe.dll
+@echo off

compiling.md

@@ -0,0 +1,52 @@
+## Compiling on Windows with MSYS2 (32-bit)
+
+Follow these steps to build `BlockLua.dll` for 32-bit Windows using MSYS2's MinGW-w64 i686 toolchain.
+
+### 1) Install MSYS2
+
+- Download and install MSYS2 from `https://www.msys2.org/`.
+- After installing, open the "MSYS2 MSYS" terminal once and update the package database if prompted.
+
+### 2) Install required packages (i686 / 32-bit)
+
+Run this in the "MSYS2 MSYS" or "MSYS2 MinGW 32-bit" terminal:
+
+```bash
+pacman -Sy --needed mingw-w64-i686-toolchain mingw-w64-i686-binutils mingw-w64-i686-lua51
+```
+
+What these packages are for:
+
+- mingw-w64-i686-toolchain: 32-bit C/C++ compiler suite (g++, libstdc++, runtime libs) to build Windows binaries.
+- mingw-w64-i686-binutils: Linker and binary utilities (ld, as, objdump) used by the compiler and for optional inspection.
+- mingw-w64-i686-lua51: Lua 5.1 development files for 32-bit (import library). We use its import library to link; at runtime you can use the provided `lua5.1.dll`.
+
+### 3) Build (PowerShell, recommended)
+
+- Open PowerShell in the repo root.
+- Run the script:
+
+```powershell
+compile.bat
+```
+
+What the script does:
+
+- Temporarily prepends `C:\\msys64\\mingw32\\bin` to PATH so the 32-bit toolchain is used.
+- Compiles the project with `-m32` and links against `lua5.1`.
+- Produces `build\BlockLua.dll` and `build\BlockLua-Unsafe.dll`.
+
+### 4) Optional: Verify 32-bit output
+
+If you installed binutils, you can check the architecture:
+
+```powershell
+objdump -f build\BlockLua.dll | Select-String i386
+```
+
+You should see `architecture: i386` in the output.
+
+### Notes
+
+- Ensure you installed the i686 (32-bit) variants of the packages; x86_64 packages won’t work for a 32-bit build.
+- If the linker cannot find `-llua5.1`, confirm `mingw-w64-i686-lua51` is installed and you are using the `mingw32` toolchain (not `x86_64`).

src/lua-env-safe.lua

@@ -4,7 +4,9 @@
 
 
 -- Utility: Convert a list of strings into a map of string->true
-local function tmap(t) local u = {}; for _, n in ipairs(t) do u[n] = true end; return u; end
+local function tmap(t)
+  local u = {}; for _, n in ipairs(t) do u[n] = true end; return u;
+end
 
 -- Save banned global variables for wrapping with safe functions
 local old_io = io
@@ -50,13 +52,13 @@ local allowed_dirs_readonly = tmap {
 --   so this is just a precaution.
 local disallowed_exts = tmap {
   -- windows
-	'bat','bin','cab','cmd','com','cpl','ex_','exe','gadget','inf','ins','inx','isu',
-	'job','jse','lnk','msc','msi','msp','mst','paf','pif','ps1','reg','rgs','scr',
-	'sct','shb','shs','u3p','vb','vbe','vbs','vbscript','ws','wsf','wsh',
+  'bat', 'bin', 'cab', 'cmd', 'com', 'cpl', 'ex_', 'exe', 'gadget', 'inf', 'ins', 'inx', 'isu',
+  'job', 'jse', 'lnk', 'msc', 'msi', 'msp', 'mst', 'paf', 'pif', 'ps1', 'reg', 'rgs', 'scr',
+  'sct', 'shb', 'shs', 'u3p', 'vb', 'vbe', 'vbs', 'vbscript', 'ws', 'wsf', 'wsh',
   -- linux
-	'csh','ksh','out','run','sh',
+  'csh', 'ksh', 'out', 'run', 'sh',
   -- mac/other
-	'action','apk','app','command','ipa','osx','prg','workflow',
+  'action', 'apk', 'app', 'command', 'ipa', 'osx', 'prg', 'workflow',
 }
 -- Arguments: file name (relative to game directory), boolean true if only reading
 -- Return: clean file path if allowed (or nil if disallowed),
@@ -68,27 +70,27 @@ local function safe_path(fn, readonly)
   -- whitelist characters
   local ic = fn:find('[^a-zA-Z0-9_%-/ %.]')
   if ic then
-		return nil, 'Filename \''..fn..'\' contains invalid character \''..
-			fn:sub(ic, ic)..'\' at position '..ic
+    return nil, 'Filename \'' .. fn .. '\' contains invalid character \'' ..
+        fn:sub(ic, ic) .. '\' at position ' .. ic
   end
   -- disallow up-dirs, absolute paths, and relative paths
   -- './' and '../' are possible in scripts, because they're processed into
   -- absolute paths in util.lua before reaching here
   if fn:find('^%.') or fn:find('%.%.') or fn:find(':') or fn:find('^/') then
-		return nil, 'Filename \''..fn..'\' contains invalid sequence'
+    return nil, 'Filename \'' .. fn .. '\' contains invalid sequence'
   end
   -- allow only whitelisted dirs
   local dir = fn:match('^([^/]+)/')
   if (not dir) or (
         (not allowed_dirs[dir:lower()]) and
-		((not readonly) or (not allowed_dirs_readonly[dir:lower()])) ) then
-		return nil, 'filename is in disallowed directory '..(dir or 'nil')
+        ((not readonly) or (not allowed_dirs_readonly[dir:lower()]))) then
+    return nil, 'filename is in disallowed directory ' .. (dir or 'nil')
   end
   -- disallow blacklisted extensions or no extension
   local ext = fn:match('%.([^/%.]+)$')
   if (not ext) or (disallowed_exts[ext:lower()]) then
-		return nil, 'Filename \''..fn..'\' has disallowed extension \''..
-			(ext or '')..'\''
+    return nil, 'Filename \'' .. fn .. '\' has disallowed extension \'' ..
+        (ext or '') .. '\''
   end
   return fn, nil
 end
@@ -96,7 +98,7 @@ end
 -- Wrap io.open with path sanitization
 function _bllua_io_open(fn, md)
   md = md or 'r'
-	local readonly = md=='r' or md=='rb'
+  local readonly = md == 'r' or md == 'rb'
   local fns, err = safe_path(fn, readonly)
   if fns then
     return old_io.open(fns, md)
@@ -104,6 +106,7 @@ function _bllua_io_open(fn, md)
     return nil, err
   end
 end
+
 -- Allow io.type (works on file handles returned by io.open)
 function _bllua_io_type(f)
   return old_io.type(f)
@@ -122,12 +125,13 @@ function _bllua_requiresecure(name)
       name:find('^%.') or name:find('%.$') then
     error('require: package name contains invalid character', 3)
   elseif disallowed_packages[name] then
-		error('require: attempt to require disallowed module \''..name..'\'', 3)
+    error('require: attempt to require disallowed module \'' .. name .. '\'', 3)
   else
     -- todo: reimplement require to not use package.* stuff?
     return old_require(name)
   end
 end
+
 package = {
   seeall = old_package.seeall,
 }

src/lua-env.lua

@@ -9,7 +9,7 @@ _bllua_on_unload = {}
 
 -- Utility for getting the current filename
 function debug.getfilename(level)
-	if type(level) == 'number' then level = level+1 end
+  if type(level) == 'number' then level = level + 1 end
   local info = debug.getinfo(level)
   if not info then return nil end
   local filename = info.source:match('^%-%-%[%[([^%]]+)%]%]')
@@ -19,20 +19,20 @@ end
 -- Called when pcall fails on a ts->lua call, used to print detailed error info
 function _bllua_on_error(err)
   err = err:match(': (.+)$') or err
-	local tracelines = {err}
+  local tracelines = { err }
   local level = 2
   while true do
     local info = debug.getinfo(level)
     if not info then break end
     local filename = debug.getfilename(level) or info.short_src
     local funcname = info.name
-		if funcname=='dofile' then break end
+    if funcname == 'dofile' then break end
     table.insert(tracelines, string.format('%s:%s in function \'%s\'',
       filename,
-			info.currentline==-1 and '' or info.currentline..':',
+      info.currentline == -1 and '' or info.currentline .. ':',
       funcname
     ))
-		level = level+1
+    level = level + 1
   end
   return table.concat(tracelines, '\n')
 end

src/util/libbl-types.lua

@@ -4,129 +4,129 @@
 
 -- Class hierarchy, adapted from https://notabug.org/Queuenard/blockland-DLL-tools/src/master/class_hierarchy
 bl.class('SimObject')
-	bl.class('ScriptObject', 'SimObject')
-	bl.class('SimSet', 'SimObject')
-		bl.class('SimGroup', 'SimSet')
-			bl.class('GuiControl', 'SimGroup')
-				bl.class('GuiTextCtrl'         , 'GuiControl')
-				bl.class('GuiSwatchCtrl'       , 'GuiControl')
-				bl.class('GuiButtonBaseCtrl'   , 'GuiControl')
-				bl.class('GuiArrayCtrl'        , 'GuiControl')
-				bl.class('GuiScrollCtrl'       , 'GuiControl')
-				bl.class('GuiMouseEventCtrl'   , 'GuiControl')
-				bl.class('GuiProgressCtrl'     , 'GuiControl')
-				bl.class('GuiSliderCtrl'       , 'GuiControl')
-				bl.class('GuiConsoleTextCtrl'  , 'GuiControl')
-				bl.class('GuiTSCtrl'           , 'GuiControl')
-					bl.class('GuiObjectView', 'GuiTSCtrl')
-					bl.class('GameTSCtrl'   , 'GuiTSCtrl')
-					bl.class('EditTSCtrl'   , 'GuiTSCtrl')
-					bl.class('GuiPlayerView', 'GuiTSCtrl')
-				bl.class('GuiShapeNameHud'     , 'GuiControl')
-				bl.class('GuiHealthBarHud'     , 'GuiControl')
-				bl.class('GuiGraphCtrl'        , 'GuiControl')
-				bl.class('GuiInspector'        , 'GuiControl')
-				bl.class('GuiChunkedBitmapCtrl', 'GuiControl')
-				bl.class('GuiInputCtrl'        , 'GuiControl')
-				bl.class('GuiNoMouseCtrl'      , 'GuiControl')
-				bl.class('GuiBitmapBorderCtrl' , 'GuiControl')
-				bl.class('GuiBackgroundCtrl'   , 'GuiControl')
-				bl.class('GuiEditorRuler'      , 'GuiControl')
-				bl.class('GuiClockHud'         , 'GuiControl')
-				bl.class('GuiEditCtrl'         , 'GuiControl')
-				bl.class('GuiFilterCtrl'       , 'GuiControl')
-				bl.class('GuiFrameSetCtrl'     , 'GuiControl')
-				bl.class('GuiMenuBar'          , 'GuiControl')
-				bl.class('GuiMessageVectorCtrl', 'GuiControl')
-				bl.class('GuiBitmapCtrl'       , 'GuiControl')
-					bl.class('GuiCrossHairHud', 'GuiBitmapCtrl')
-			bl.class('ScriptGroup', 'SimGroup')
-			bl.class('NetConnection', 'SimGroup')
-				bl.class('GameConnection', 'NetConnection')
-			bl.class('Path', 'SimGroup')
-	bl.class('TCPObject', 'SimObject')
-		bl.class('SOCKObject', 'TCPObject')
-		bl.class('HTTPObject', 'TCPObject')
-	bl.class('SimDataBlock', 'SimObject')
-		bl.class('AudioEnvironment'      , 'SimDataBlock')
-		bl.class('AudioSampleEnvironment', 'SimDataBlock')
-		bl.class('AudioDescription'      , 'SimDataBlock')
-		bl.class('GameBaseData'          , 'SimDataBlock')
-			bl.class('ShapeBaseData'          , 'GameBaseData')
-				bl.class('CameraData'       , 'ShapeBaseData')
-				bl.class('ItemData'         , 'ShapeBaseData')
-				bl.class('MissionMarkerData', 'ShapeBaseData')
-				bl.class('PathCameraData'   , 'ShapeBaseData')
-				bl.class('PlayerData'       , 'ShapeBaseData')
-				bl.class('StaticShapeData'  , 'ShapeBaseData')
-				bl.class('VehicleData'      , 'ShapeBaseData')
-					bl.class('FlyingVehicleData' , 'VehicleData')
-					bl.class('WheeledVehicleData', 'VehicleData')
-			bl.class('DebrisData'             , 'GameBaseData')
-			bl.class('ProjectileData'         , 'GameBaseData')
-			bl.class('ShapeBaseImageData'     , 'GameBaseData')
-			bl.class('TriggerData'            , 'GameBaseData')
-			bl.class('ExplosionData'          , 'GameBaseData')
-			bl.class('fxLightData'            , 'GameBaseData')
-			bl.class('LightningData'          , 'GameBaseData')
-			bl.class('ParticleEmitterNodeData', 'GameBaseData')
-			bl.class('SplashData'             , 'GameBaseData')
-			bl.class('fxDTSBrickData'         , 'GameBaseData')
-			bl.class('ParticleEmitterData'    , 'GameBaseData')
-		bl.class('WheeledVehicleTire'    , 'SimDataBlock')
-		bl.class('WheeledVehicleSpring'  , 'SimDataBlock')
-		bl.class('TSShapeConstructor'    , 'SimDataBlock')
-		bl.class('AudioProfile'          , 'SimDataBlock')
-		bl.class('ParticleData'          , 'SimDataBlock')
-	bl.class('MaterialPropertyMap', 'SimObject')
-	bl.class('NetObject', 'SimObject')
-		bl.class('SceneObject', 'NetObject')
-			bl.class('GameBase', 'SceneObject')
-				bl.class('ShapeBase', 'GameBase')
-					bl.class('MissionMarker', 'ShapeBase')
-						bl.class('SpawnSphere'       , 'MissionMarker')
-						bl.class('VehicleSpawnMarker', 'MissionMarker')
-						bl.class('Waypoint'          , 'MissionMarker')
-					bl.class('StaticShape'  , 'ShapeBase')
-						bl.class('ScopeAlwaysShape', 'StaticShape')
-					bl.class('Player'       , 'ShapeBase')
-						bl.class('AIPlayer', 'Player')
-					bl.class('Camera'       , 'ShapeBase')
-					bl.class('Item'         , 'ShapeBase')
-					bl.class('PathCamera'   , 'ShapeBase')
-					bl.class('Vehicle'      , 'ShapeBase')
-						bl.class('FlyingVehicle' , 'Vehicle')
-						bl.class('WheeledVehicle', 'Vehicle')
-				bl.class('Explosion'          , 'GameBase')
-				bl.class('Splash'             , 'GameBase')
-				bl.class('Debris'             , 'GameBase')
-				bl.class('Projectile'         , 'GameBase')
-				bl.class('Trigger'            , 'GameBase')
-				bl.class('fxLight'            , 'GameBase')
-				bl.class('Lightning'          , 'GameBase')
-				bl.class('ParticleEmitterNode', 'GameBase')
-				bl.class('ParticleEmitter'    , 'GameBase')
-				bl.class('Precipitation'      , 'GameBase')
-			bl.class('TSStatic'      , 'SceneObject')
-			bl.class('VehicleBlocker', 'SceneObject')
-			bl.class('Marker'        , 'SceneObject')
-			bl.class('AudioEmitter'  , 'SceneObject')
-			bl.class('PhysicalZone'  , 'SceneObject')
-			bl.class('fxDayCycle'    , 'SceneObject')
-			bl.class('fxDTSBrick'    , 'SceneObject')
-			bl.class('fxPlane'       , 'SceneObject')
-			bl.class('fxSunLight'    , 'SceneObject')
-			bl.class('Sky'           , 'SceneObject')
-			bl.class('SceneRoot'     , 'SceneObject')
-		bl.class('Sun', 'NetObject')
-	bl.class('GuiCursor', 'SimObject')
-	bl.class('ConsoleLogger'    , 'SimObject')
-	bl.class('QuotaObject'      , 'SimObject')
-	bl.class('FileObject'       , 'SimObject')
-	bl.class('BanList'          , 'SimObject')
-	bl.class('GuiControlProfile', 'SimObject')
-	bl.class('MessageVector'    , 'SimObject')
-	bl.class('ActionMap'        , 'SimObject')
+bl.class('ScriptObject', 'SimObject')
+bl.class('SimSet', 'SimObject')
+bl.class('SimGroup', 'SimSet')
+bl.class('GuiControl', 'SimGroup')
+bl.class('GuiTextCtrl', 'GuiControl')
+bl.class('GuiSwatchCtrl', 'GuiControl')
+bl.class('GuiButtonBaseCtrl', 'GuiControl')
+bl.class('GuiArrayCtrl', 'GuiControl')
+bl.class('GuiScrollCtrl', 'GuiControl')
+bl.class('GuiMouseEventCtrl', 'GuiControl')
+bl.class('GuiProgressCtrl', 'GuiControl')
+bl.class('GuiSliderCtrl', 'GuiControl')
+bl.class('GuiConsoleTextCtrl', 'GuiControl')
+bl.class('GuiTSCtrl', 'GuiControl')
+bl.class('GuiObjectView', 'GuiTSCtrl')
+bl.class('GameTSCtrl', 'GuiTSCtrl')
+bl.class('EditTSCtrl', 'GuiTSCtrl')
+bl.class('GuiPlayerView', 'GuiTSCtrl')
+bl.class('GuiShapeNameHud', 'GuiControl')
+bl.class('GuiHealthBarHud', 'GuiControl')
+bl.class('GuiGraphCtrl', 'GuiControl')
+bl.class('GuiInspector', 'GuiControl')
+bl.class('GuiChunkedBitmapCtrl', 'GuiControl')
+bl.class('GuiInputCtrl', 'GuiControl')
+bl.class('GuiNoMouseCtrl', 'GuiControl')
+bl.class('GuiBitmapBorderCtrl', 'GuiControl')
+bl.class('GuiBackgroundCtrl', 'GuiControl')
+bl.class('GuiEditorRuler', 'GuiControl')
+bl.class('GuiClockHud', 'GuiControl')
+bl.class('GuiEditCtrl', 'GuiControl')
+bl.class('GuiFilterCtrl', 'GuiControl')
+bl.class('GuiFrameSetCtrl', 'GuiControl')
+bl.class('GuiMenuBar', 'GuiControl')
+bl.class('GuiMessageVectorCtrl', 'GuiControl')
+bl.class('GuiBitmapCtrl', 'GuiControl')
+bl.class('GuiCrossHairHud', 'GuiBitmapCtrl')
+bl.class('ScriptGroup', 'SimGroup')
+bl.class('NetConnection', 'SimGroup')
+bl.class('GameConnection', 'NetConnection')
+bl.class('Path', 'SimGroup')
+bl.class('TCPObject', 'SimObject')
+bl.class('SOCKObject', 'TCPObject')
+bl.class('HTTPObject', 'TCPObject')
+bl.class('SimDataBlock', 'SimObject')
+bl.class('AudioEnvironment', 'SimDataBlock')
+bl.class('AudioSampleEnvironment', 'SimDataBlock')
+bl.class('AudioDescription', 'SimDataBlock')
+bl.class('GameBaseData', 'SimDataBlock')
+bl.class('ShapeBaseData', 'GameBaseData')
+bl.class('CameraData', 'ShapeBaseData')
+bl.class('ItemData', 'ShapeBaseData')
+bl.class('MissionMarkerData', 'ShapeBaseData')
+bl.class('PathCameraData', 'ShapeBaseData')
+bl.class('PlayerData', 'ShapeBaseData')
+bl.class('StaticShapeData', 'ShapeBaseData')
+bl.class('VehicleData', 'ShapeBaseData')
+bl.class('FlyingVehicleData', 'VehicleData')
+bl.class('WheeledVehicleData', 'VehicleData')
+bl.class('DebrisData', 'GameBaseData')
+bl.class('ProjectileData', 'GameBaseData')
+bl.class('ShapeBaseImageData', 'GameBaseData')
+bl.class('TriggerData', 'GameBaseData')
+bl.class('ExplosionData', 'GameBaseData')
+bl.class('fxLightData', 'GameBaseData')
+bl.class('LightningData', 'GameBaseData')
+bl.class('ParticleEmitterNodeData', 'GameBaseData')
+bl.class('SplashData', 'GameBaseData')
+bl.class('fxDTSBrickData', 'GameBaseData')
+bl.class('ParticleEmitterData', 'GameBaseData')
+bl.class('WheeledVehicleTire', 'SimDataBlock')
+bl.class('WheeledVehicleSpring', 'SimDataBlock')
+bl.class('TSShapeConstructor', 'SimDataBlock')
+bl.class('AudioProfile', 'SimDataBlock')
+bl.class('ParticleData', 'SimDataBlock')
+bl.class('MaterialPropertyMap', 'SimObject')
+bl.class('NetObject', 'SimObject')
+bl.class('SceneObject', 'NetObject')
+bl.class('GameBase', 'SceneObject')
+bl.class('ShapeBase', 'GameBase')
+bl.class('MissionMarker', 'ShapeBase')
+bl.class('SpawnSphere', 'MissionMarker')
+bl.class('VehicleSpawnMarker', 'MissionMarker')
+bl.class('Waypoint', 'MissionMarker')
+bl.class('StaticShape', 'ShapeBase')
+bl.class('ScopeAlwaysShape', 'StaticShape')
+bl.class('Player', 'ShapeBase')
+bl.class('AIPlayer', 'Player')
+bl.class('Camera', 'ShapeBase')
+bl.class('Item', 'ShapeBase')
+bl.class('PathCamera', 'ShapeBase')
+bl.class('Vehicle', 'ShapeBase')
+bl.class('FlyingVehicle', 'Vehicle')
+bl.class('WheeledVehicle', 'Vehicle')
+bl.class('Explosion', 'GameBase')
+bl.class('Splash', 'GameBase')
+bl.class('Debris', 'GameBase')
+bl.class('Projectile', 'GameBase')
+bl.class('Trigger', 'GameBase')
+bl.class('fxLight', 'GameBase')
+bl.class('Lightning', 'GameBase')
+bl.class('ParticleEmitterNode', 'GameBase')
+bl.class('ParticleEmitter', 'GameBase')
+bl.class('Precipitation', 'GameBase')
+bl.class('TSStatic', 'SceneObject')
+bl.class('VehicleBlocker', 'SceneObject')
+bl.class('Marker', 'SceneObject')
+bl.class('AudioEmitter', 'SceneObject')
+bl.class('PhysicalZone', 'SceneObject')
+bl.class('fxDayCycle', 'SceneObject')
+bl.class('fxDTSBrick', 'SceneObject')
+bl.class('fxPlane', 'SceneObject')
+bl.class('fxSunLight', 'SceneObject')
+bl.class('Sky', 'SceneObject')
+bl.class('SceneRoot', 'SceneObject')
+bl.class('Sun', 'NetObject')
+bl.class('GuiCursor', 'SimObject')
+bl.class('ConsoleLogger', 'SimObject')
+bl.class('QuotaObject', 'SimObject')
+bl.class('FileObject', 'SimObject')
+bl.class('BanList', 'SimObject')
+bl.class('GuiControlProfile', 'SimObject')
+bl.class('MessageVector', 'SimObject')
+bl.class('ActionMap', 'SimObject')
 
 -- Auto-generated from game scripts
 bl.type('ActionMap::blockBind:1', 'object')

src/util/libts-lua.lua

@@ -1,4 +1,3 @@
-
 -- This Lua code provides some built-in utilities for writing Lua add-ons
 -- It is eval'd automatically once BLLua3 has loaded the TS API and environment
 -- It only has access to the sandboxed lua environment, just like user code.
@@ -7,8 +6,11 @@ ts = _bllua_ts
 
 -- Provide limited OS functions
 os = os or {}
-function os.time() return math.floor(tonumber(_bllua_ts.call('getSimTime'))/1000) end
-function os.clock() return tonumber(_bllua_ts.call('getSimTime'))/1000 end
+---@diagnostic disable-next-line: duplicate-set-field
+function os.time() return math.floor(tonumber(_bllua_ts.call('getSimTime')) / 1000) end
+
+---@diagnostic disable-next-line: duplicate-set-field
+function os.clock() return tonumber(_bllua_ts.call('getSimTime')) / 1000 end
 
 -- Virtual file class, emulating a file object as returned by io.open
 -- Used to wrap io.open to allow reading from zips (using TS)
@@ -18,9 +20,9 @@ function os.clock() return tonumber(_bllua_ts.call('getSimTime'))/1000 end
 local file_meta = {
   read = function(file, mode)
     file:_init()
-		if not file or type(file)~='table' or not file._is_file then error('File:read: Not a file', 2) end
+    if not file or type(file) ~= 'table' or not file._is_file then error('File:read: Not a file', 2) end
     if file._is_open ~= true then error('File:read: File is closed', 2) end
-		if mode=='*n' then
+    if mode == '*n' then
       local ws, n = file.data:match('^([ \t\r\n]*)([0-9%.%-e]+)', file.pos)
       if n then
         file.pos = file.pos + #ws + #n
@@ -28,15 +30,15 @@ local file_meta = {
       else
         return nil
       end
-		elseif mode=='*a' then
+    elseif mode == '*a' then
       local d = file.data:sub(file.pos, #file.data)
       file.pos = #file.data + 1
       return d
-		elseif mode=='*l' then
+    elseif mode == '*l' then
       local l, ws = file.data:match('^([^\r\n]*)(\r?\n)', file.pos)
       if not l then
         l = file.data:match('^([^\r\n]*)$', file.pos); ws = '';
-				if l=='' then return nil end
+        if l == '' then return nil end
       end
       if l then
         file.pos = file.pos + #l + #ws
@@ -44,12 +46,12 @@ local file_meta = {
       else
         return nil
       end
-		elseif type(mode)=='number' then
-			local d = file.data:sub(file.pos, file.pos+mode)
+    elseif type(mode) == 'number' then
+      local d = file.data:sub(file.pos, file.pos + mode)
       file.pos = file.pos + #d
       return d
     else
-			error('File:read: Invalid mode \''..mode..'\'', 2)
+      error('File:read: Invalid mode \'' .. mode .. '\'', 2)
     end
   end,
   lines = function(file)
@@ -82,8 +84,10 @@ local function new_file_obj(fn)
   return file
 end
 
-local function tflip(t) local u = {}; for _, n in ipairs(t) do u[n] = true end; return u; end
-local allowed_zip_dirs = tflip{
+local function tflip(t)
+  local u = {}; for _, n in ipairs(t) do u[n] = true end; return u;
+end
+local allowed_zip_dirs = tflip {
   'add-ons', 'base', 'config', 'saves', 'screenshots', 'shaders'
 }
 local function io_open_absolute(fn, mode)
@@ -97,8 +101,9 @@ local function io_open_absolute(fn, mode)
   local exist = _bllua_ts.call('isFile', fn) == '1'
   if not exist then return nil, err end
 
-	if mode~=nil and mode~='r' and mode~='rb' then
-		return nil, 'Files in zips can only be opened in read mode' end
+  if mode ~= nil and mode ~= 'r' and mode ~= 'rb' then
+    return nil, 'Files in zips can only be opened in read mode'
+  end
 
   -- return a temp lua file object with the data
   local fi = new_file_obj(fn)
@@ -106,6 +111,7 @@ local function io_open_absolute(fn, mode)
 end
 
 io = io or {}
+---@diagnostic disable-next-line: duplicate-set-field
 function io.open(fn, mode, errn)
   errn = errn or 1
 
@@ -114,7 +120,7 @@ function io.open(fn, mode, errn)
   if curfn == '' then curfn = nil end
   if fn:find('^%.') then
     local relfn = curfn and fn:find('^%./') and
-			curfn:gsub('[^/]+$', '')..fn:gsub('^%./', '')
+        curfn:gsub('[^/]+$', '') .. fn:gsub('^%./', '')
     if relfn then
       local fi, err = io_open_absolute(relfn, mode)
       return fi, err, relfn
@@ -126,13 +132,19 @@ function io.open(fn, mode, errn)
     return fi, err, fn
   end
 end
+
+---@diagnostic disable-next-line: duplicate-set-field
 function io.lines(fn)
   local fi, err, fn2 = io.open(fn, nil, 2)
-	if not fi then error('Error opening file \''..fn2..'\': '..err, 2) end
+  if not fi then error('Error opening file \'' .. fn2 .. '\': ' .. err, 2) end
   return fi:lines()
 end
+
+---@diagnostic disable-next-line: duplicate-set-field
 function io.type(f)
-	if type(f)=='table' and f._is_file then
+  ---@diagnostic disable-next-line: undefined-field
+  if type(f) == 'table' and f._is_file then
+    ---@diagnostic disable-next-line: undefined-field
     return f._is_open and 'file' or 'closed file'
   else
     return _bllua_io_type(f)
@@ -143,13 +155,13 @@ end
 function dofile(fn, errn)
   errn = errn or 1
 
-	local fi, err, fn2 = io.open(fn, 'r', errn+1)
-	if not fi then error('Error executing file \''..fn2..'\': '..err, errn+1) end
+  local fi, err, fn2 = io.open(fn, 'r', errn + 1)
+  if not fi then error('Error executing file \'' .. fn2 .. '\': ' .. err, errn + 1) end
 
-	print('Executing '..fn2)
+  print('Executing ' .. fn2)
   local text = fi:read('*a')
   fi:close()
-	return assert(loadstring('--[['..fn2..']]'..text))()
+  return assert(loadstring('--[[' .. fn2 .. ']]' .. text))()
 end
 
 -- provide require (just a wrapper for dofile)
@@ -158,7 +170,7 @@ end
 --   blockland directory
 --   current add-on
 local function file_exists(fn, errn)
-	local fi, err, fn2 = io.open(fn, 'r', errn+1)
+  local fi, err, fn2 = io.open(fn, 'r', errn + 1)
   if fi then
     fi:close()
     return fn2
@@ -171,20 +183,20 @@ function require(mod)
   if require_memo[mod] then return unpack(require_memo[mod]) end
   local fp = mod:gsub('%.', '/')
   local fns = {
-		'./'..fp..'.lua',      -- local file
-		'./'..fp..'/init.lua', -- local library
-		fp..'.lua',            -- global file
-		fp..'/init.lua',       -- global library
+    './' .. fp .. '.lua', -- local file
+    './' .. fp .. '/init.lua', -- local library
+    fp .. '.lua',        -- global file
+    fp .. '/init.lua',   -- global library
   }
   if fp:lower():find('^add-ons/') then
-		local addonpath = fp:lower():match('^add-ons/[^/]+')..'/'
-		table.insert(fns, addonpath..fp..'.lua')      -- add-on file
-		table.insert(fns, addonpath..fp..'/init.lua') -- add-on library
+    local addonpath = fp:lower():match('^add-ons/[^/]+') .. '/'
+    table.insert(fns, addonpath .. fp .. '.lua') -- add-on file
+    table.insert(fns, addonpath .. fp .. '/init.lua') -- add-on library
   end
-	for _,fn in ipairs(fns) do
+  for _, fn in ipairs(fns) do
     local fne = file_exists(fn, 2)
     if fne then
-			local res = {dofile(fne, 2)}
+      local res = { dofile(fne, 2) }
       require_memo[mod] = res
       return unpack(res)
     end
@@ -194,18 +206,22 @@ end
 
 -- Exposure to TS
 function _bllua_getvar(name) return _G[name] end
+
 function _bllua_setvar(name, val) _G[name] = val end
+
 function _bllua_eval(code) return loadstring(code)() end
+
 function _bllua_exec(fn) return dofile(fn, 2) end
 
 local function isValidCode(code)
-	local f,e = loadstring(code)
-	return f~=nil
+  local f, e = loadstring(code)
+  return f ~= nil
 end
 function _bllua_smarteval(code)
-	if (not code:find('^print%(')) and isValidCode('print('..code..')') then
-		code = 'print('..code..')' end
-	local f,e = loadstring(code)
+  if (not code:find('^print%(')) and isValidCode('print(' .. code .. ')') then
+    code = 'print(' .. code .. ')'
+  end
+  local f, e = loadstring(code)
   if f then
     return f()
   else

src/util/std.lua

@@ -1,263 +1,285 @@
-
 -- Basic functionality that should be standard in Lua
 
 
 -- Table / List
 -- Whether a table contains no keys
 function table.empty(t)
-	return next(t)~=nil
+  return next(t) ~= nil
 end
+
 -- Apply a function to each key in a table
 function table.map(f, ...)
-	local ts = {...}
+  local ts = { ... }
   local u = {}
-	for k,_ in pairs(ts[1]) do
+  for k, _ in pairs(ts[1]) do
     local args = {}
-		for j=1,#ts do args[j] = ts[j][i] end
+    for j = 1, #ts do args[j] = ts[j][i] end
     u[i] = f(unpack(args))
   end
   return u
 end
+
 function table.map_list(f, ...)
-	local ts = {...}
+  local ts = { ... }
   local u = {}
-	for i=1,#ts[1] do
+  for i = 1, #ts[1] do
     local args = {}
-		for j=1,#ts do args[j] = ts[j][i] end
+    for j = 1, #ts do args[j] = ts[j][i] end
     u[i] = f(unpack(args))
   end
   return u
 end
+
 -- Swap keys/values
 function table.swap(t)
   local u = {}
-	for k,v in pairs(t) do u[v] = k end
+  for k, v in pairs(t) do u[v] = k end
   return u
 end
+
 -- Reverse a list
 function table.reverse(l)
   local m = {}
-	for i=1,#l do m[#l-i+1] = l[i] end
+  for i = 1, #l do m[#l - i + 1] = l[i] end
   return m
 end
+
 -- Whether a table is a list/array (has only monotonic integer keys)
 function table.islist(t)
   local n = 0
-	for i,_ in pairs(t) do
-		if type(i)~='number' or i%1~=0 then return false end
-		n = n+1
+  for i, _ in pairs(t) do
+    if type(i) ~= 'number' or i % 1 ~= 0 then return false end
+    n = n + 1
   end
-	return n==#t
+  return n == #t
 end
+
 -- Append contents of other tables to first table
 function table.append(t, ...)
-	local a = {...}
-	for _,u in ipairs(a) do
-		for _,v in ipairs(u) do table.insert(t,v) end
+  local a = { ... }
+  for _, u in ipairs(a) do
+    for _, v in ipairs(u) do table.insert(t, v) end
   end
   return t
 end
+
 -- Create a new table containing all keys from any number of tables
 -- latter tables in the arg list override prior ones
 -- overlaps, NOT appends, integer keys
 function table.join(...)
-	local ts = {...}
+  local ts = { ... }
   local w = {}
-	for _,t in ipairs(ts) do
-		for k,v in pairs(t) do w[k] = v end
+  for _, t in ipairs(ts) do
+    for k, v in pairs(t) do w[k] = v end
   end
   return w
 end
+
 -- Whether a table contains a certain value in any key
-function table.contains(t,s)
-	for _,v in pairs(t) do
-		if v==s then return true end
+function table.contains(t, s)
+  for _, v in pairs(t) do
+    if v == s then return true end
   end
   return false
 end
-function table.contains_list(t,s)
-	for _,v in ipairs(t) do
-		if v==s then return true end
+
+function table.contains_list(t, s)
+  for _, v in ipairs(t) do
+    if v == s then return true end
   end
   return false
 end
+
 -- Copy a table to another table
 function table.copy(t)
   local u = {}
-	for k,v in pairs(t) do u[k] = v end
+  for k, v in pairs(t) do u[k] = v end
   return u
 end
+
 function table.copy_list(l)
   local m = {}
-	for i,v in ipairs(l) do m[i] = v end
+  for i, v in ipairs(l) do m[i] = v end
   return m
 end
+
 -- Sort a table in a new copy
 function table.sortcopy(t, f)
   local u = table.copy_list(t)
   table.sort(u, f)
   return u
 end
+
 -- Remove a value from a table
 function table.removevalue(t, r)
   local rem = {}
-	for k,v in pairs(t) do
-		if v==r then table.insert(rem, k) end
+  for k, v in pairs(t) do
+    if v == r then table.insert(rem, k) end
   end
-	for _,k in ipairs(rem) do t[k] = nil end
+  for _, k in ipairs(rem) do t[k] = nil end
 end
+
 function table.removevalue_list(t, r)
   for i = #t, 1, -1 do
-		if t[i]==r then
+    if t[i] == r then
       table.remove(t, i)
     end
   end
 end
+
 -- Export tables into formatted executable strings
 local function tabs(tabLevel)
   return ('  '):rep(tabLevel)
 end
 local valueToString
 local function tableToString(t, tabLevel, seen)
-	if type(t)~='table' or (getmetatable(t) and getmetatable(t).__tostring) then
+  if type(t) ~= 'table' or (getmetatable(t) and getmetatable(t).__tostring) then
     return tostring(t)
   elseif table.islist(t) then
-		if #t==0 then
+    if #t == 0 then
       return '{}'
     else
       local strs = {}
       local containsTables = false
-			for _,v in ipairs(t) do
-				if type(v)=='table' then containsTables = true end
-				table.insert(strs, valueToString(v, tabLevel+1, seen)..',')
+      for _, v in ipairs(t) do
+        if type(v) == 'table' then containsTables = true end
+        table.insert(strs, valueToString(v, tabLevel + 1, seen) .. ',')
       end
-			if containsTables or #t>3 then
-				return '{\n'..tabs(tabLevel+1)
-					..table.concat(strs, '\n'..tabs(tabLevel+1))
-					..'\n'..tabs(tabLevel)..'}'
+      if containsTables or #t > 3 then
+        return '{\n' .. tabs(tabLevel + 1)
+            .. table.concat(strs, '\n' .. tabs(tabLevel + 1))
+            .. '\n' .. tabs(tabLevel) .. '}'
       else
-				return '{ '..table.concat(strs, ' ')..' }'
+        return '{ ' .. table.concat(strs, ' ') .. ' }'
       end
     end
   else
     local containsNonStringKeys = false
-		for k,v in pairs(t) do
-			if type(k)~='string' or k:find('[^a-zA-Z0-9_]') then
+    for k, v in pairs(t) do
+      if type(k) ~= 'string' or k:find('[^a-zA-Z0-9_]') then
         containsNonStringKeys = true
-			elseif type(k)=='table' then
+      elseif type(k) == 'table' then
         error('table.tostring: table contains a table as key, cannot serialize')
       end
     end
     local strs = {}
     if containsNonStringKeys then
-			for k,v in pairs(t) do
-				table.insert(strs, '\n'..tabs(tabLevel+1)
-					..'['..valueToString(k, tabLevel+1, seen)..'] = '
-					..valueToString(v, tabLevel+1, seen)..',')
+      for k, v in pairs(t) do
+        table.insert(strs, '\n' .. tabs(tabLevel + 1)
+          .. '[' .. valueToString(k, tabLevel + 1, seen) .. '] = '
+          .. valueToString(v, tabLevel + 1, seen) .. ',')
       end
     else
-			for k,v in pairs(t) do
-				table.insert(strs, '\n'..tabs(tabLevel+1)
-					..k..' = '..valueToString(v, tabLevel+1, seen)..',')
+      for k, v in pairs(t) do
+        table.insert(strs, '\n' .. tabs(tabLevel + 1)
+          .. k .. ' = ' .. valueToString(v, tabLevel + 1, seen) .. ',')
       end
     end
-		return '{'..table.concat(strs)..'\n'..tabs(tabLevel)..'}'
+    return '{' .. table.concat(strs) .. '\n' .. tabs(tabLevel) .. '}'
   end
 end
 valueToString = function(v, tabLevel, seen)
   local t = type(v)
-	if t=='table' then
+  if t == 'table' then
     if seen[v] then
-			return 'nil --[[ already seen: '..tostring(v)..' ]]'
+      return 'nil --[[ already seen: ' .. tostring(v) .. ' ]]'
     else
       seen[v] = true
       return tableToString(v, tabLevel, seen)
     end
-	elseif t=='string' then
-		return '\''..string.escape(v)..'\''
-	elseif t=='number' or t=='boolean' then
+  elseif t == 'string' then
+    return '\'' .. string.escape(v) .. '\''
+  elseif t == 'number' or t == 'boolean' then
     return tostring(v)
   else
     --error('table.tostring: table contains a '..t..' value, cannot serialize')
-		return 'nil --[[ cannot serialize '..t..': '..tostring(v)..' ]]'
+    return 'nil --[[ cannot serialize ' .. t .. ': ' .. tostring(v) .. ' ]]'
   end
 end
 function table.tostring(t)
   return tableToString(t, 0, {})
 end
 
-
 -- String
 
 -- Split string into table by separator
 -- or by chars if no separator given
 -- if regex is not true, sep is treated as a regex pattern
 function string.split(str, sep, noregex)
-	if type(str)~='string' then
-		error('string.split: argument #1: expected string, got '..type(str), 2) end
-	if sep==nil or sep=='' then
+  if type(str) ~= 'string' then
+    error('string.split: argument #1: expected string, got ' .. type(str), 2)
+  end
+  if sep == nil or sep == '' then
     local t = {}
     local ns = #str
     for x = 1, ns do
       table.insert(t, str:sub(x, x))
     end
     return t
-	elseif type(sep)=='string' then
+  elseif type(sep) == 'string' then
     local t = {}
-		if #str>0 then
+    if #str > 0 then
       local first = 1
       while true do
         local last, newfirst = str:find(sep, first, noregex)
         if not last then break end
-				table.insert(t, str:sub(first, last-1))
-				first = newfirst+1
+        table.insert(t, str:sub(first, last - 1))
+        first = newfirst + 1
       end
       table.insert(t, str:sub(first, #str))
     end
     return t
   else
     error(
-			'string.split: argument #2: expected string or nil, got '..type(sep), 2)
+      'string.split: argument #2: expected string or nil, got ' .. type(sep), 2)
   end
 end
+
 -- Split string to a list of char bytes
 function string.bytes(s)
   local b = {}
-	for i=1,#s do
-		local c = s:sub(i,i)
+  for i = 1, #s do
+    local c = s:sub(i, i)
     table.insert(b, c:byte())
   end
   return b
 end
+
 -- Trim leading and trailing whitespace
 function string.trim(s, ws)
   ws = ws or ' \t\r\n'
-	return s:gsub('^['..ws..']+', ''):gsub('['..ws..']+$', '')..''
+  return s:gsub('^[' .. ws .. ']+', ''):gsub('[' .. ws .. ']+$', '') .. ''
 end
+
 -- String slicing and searching using [] operator
 local str_meta = getmetatable('')
-local str_meta_index_old= str_meta.__index
-function str_meta.__index(s,k)
-	if type(k)=='string' then
+local str_meta_index_old = str_meta.__index
+function str_meta.__index(s, k)
+  if type(k) == 'string' then
     return str_meta_index_old[k]
-	elseif type(k)=='number' then
-		if k<0 then k = #s+k+1 end
-		return string.sub(s,k,k)
-	elseif type(k)=='table' then
-		local a = k[1]<0 and (#s+k[1]+1) or k[1]
-		local b = k[2]<0 and (#s+k[2]+1) or k[2]
-		return string.sub(s,a,b)
+  elseif type(k) == 'number' then
+    if k < 0 then k = #s + k + 1 end
+    return string.sub(s, k, k)
+  elseif type(k) == 'table' then
+    local a = k[1] < 0 and (#s + k[1] + 1) or k[1]
+    local b = k[2] < 0 and (#s + k[2] + 1) or k[2]
+    return string.sub(s, a, b)
   end
 end
+
 -- String iterator
 function string.chars(s)
   local i = 0
   return function()
-		i = i+1
-		if i<=#s then return s:sub(i,i)
-		else return nil end
+    i = i + 1
+    if i <= #s then
+      return s:sub(i, i)
+    else
+      return nil
+    end
   end
 end
+
 -- Escape sequences
 local defaultEscapes = {
   ['\\'] = '\\\\',
@@ -271,12 +293,13 @@ local defaultEscapes = {
 function string.escape(s, escapes)
   escapes = escapes or defaultEscapes
   local t = {}
-	for i=1,#s do
-		local c = s:sub(i,i)
+  for i = 1, #s do
+    local c = s:sub(i, i)
     table.insert(t, escapes[c] or c)
   end
   return table.concat(t)
 end
+
 local defaultEscapeChar = '\\'
 local defaultUnescapes = {
   ['\\'] = '\\',
@@ -292,13 +315,13 @@ function string.unescape(s, escapeChar, unescapes)
   unescapes = unescapes or defaultUnescapes
   local t = {}
   local inEscape = false
-	for i=1,#s do
-		local c = s:sub(i,i)
+  for i = 1, #s do
+    local c = s:sub(i, i)
     if inEscape then
       table.insert(t, unescapes[c]
         or error('string.unescape: invalid escape sequence: \''
-					..escapeChar..c..'\''))
-		elseif c==escapeChar then
+          .. escapeChar .. c .. '\''))
+    elseif c == escapeChar then
       inEscape = true
     else
       table.insert(t, c)
@@ -307,40 +330,44 @@ function string.unescape(s, escapeChar, unescapes)
   return table.concat(t)
 end
 
-
 -- IO
 
 io = io or {}
 -- Read entire file at once, return nil,err if access failed
 function io.readall(filename)
-	local fi,err = io.open(filename, 'rb')
-	if not fi then return nil,err end
+  local fi, err = io.open(filename, 'rb')
+  if not fi then return nil, err end
   local s = fi:read("*a")
   fi:close()
   return s
 end
+
 -- Write data to file all at once, return true if success / false,err if failure
 function io.writeall(filename, data)
-	local fi,err = io.open(filename, 'wb')
-	if not fi then return false,err end
+  local fi, err = io.open(filename, 'wb')
+  if not fi then return false, err end
   fi:write(data)
   fi:close()
-	return true,nil
+  return true, nil
 end
 
-
 -- Math
 
 -- Round
 function math.round(x)
-	return math.floor(x+0.5)
+  return math.floor(x + 0.5)
 end
+
 -- Mod that accounts for floating point inaccuracy
-function math.mod(a,b)
-	local m = a%b
-	if m==0 or math.abs(m)<1e-15 or math.abs(m-b)<1e-15 then return 0
-	else return m end
+function math.mod(a, b)
+  local m = a % b
+  if m == 0 or math.abs(m) < 1e-15 or math.abs(m - b) < 1e-15 then
+    return 0
+  else
+    return m
+  end
 end
+
 -- Clamp value between min and max
 function math.clamp(v, n, x)
   return math.min(x, math.max(v, n))

src/util/vector.lua

@@ -1,26 +1,28 @@
-
 -- Vector math class with operators
 local vector_meta
 local vector_new
 local function vector_check(v, n, name, argn)
   if not v.__is_vector then
-		error('vector '..name..': argument #'..(argn or 1)
-			..': expected vector, got '..type(v), n+1) end
+    error('vector ' .. name .. ': argument #' .. (argn or 1)
+      .. ': expected vector, got ' .. type(v), n + 1)
+  end
 end
 local function vector_checksamelen(v1, v2, name)
   vector_check(v1, 3, name, 1)
   vector_check(v2, 3, name, 2)
-	if #v1~=#v2 then
-		error('vector '..name..': vector lengths do not match (lengths are '
-			..#v1..' and '..#v2..')', 3) end
+  if #v1 ~= #v2 then
+    error('vector ' .. name .. ': vector lengths do not match (lengths are '
+      .. #v1 .. ' and ' .. #v2 .. ')', 3)
+  end
   return #v1
 end
 local function vector_checklen(v1, v2, name, len)
   vector_check(v1, 3, name, 1)
   vector_check(v2, 3, name, 2)
-	if #v1~=len or #v2~=len then
-		error('vector '..name..': vector lengths are not '..len..' (lengths are '
-			..#v1..' and '..#v2..')', 3) end
+  if #v1 ~= len or #v2 ~= len then
+    error('vector ' .. name .. ': vector lengths are not ' .. len .. ' (lengths are '
+      .. #v1 .. ' and ' .. #v2 .. ')', 3)
+  end
 end
 local function vector_opnnn(name, op)
   return function(v1, v2)
@@ -34,8 +36,8 @@ local function vector_opnnn(name, op)
 end
 local function vector_opnxn(name, op)
   return function(v1, v2)
-		local v1v = type(v1)=='table' and v1.__is_vector
-		local v2v = type(v2)=='table' and v2.__is_vector
+    local v1v = type(v1) == 'table' and v1.__is_vector
+    local v2v = type(v2) == 'table' and v2.__is_vector
     if v1v and v2v then
       local len = vector_checksamelen(v1, v2, name)
       local v3 = {}
@@ -44,7 +46,7 @@ local function vector_opnxn(name, op)
       end
       return vector_new(v3)
     else
-			if v2v then v1,v2 = v2,v1 end
+      if v2v then v1, v2 = v2, v1 end
       local len = #v1
       local v3 = {}
       for i = 1, len do
@@ -65,26 +67,32 @@ local function vector_opn0n(name, op)
     return vector_new(v2)
   end
 end
-local vector_indices = {x = 1, y = 2, z = 3, w = 4, r = 1, g = 2, b = 3, a = 4}
+local vector_indices = { x = 1, y = 2, z = 3, w = 4, r = 1, g = 2, b = 3, a = 4 }
 local vector_meta = {
   __is_vector     = true,
   __index         = function(t, k)
-		if tonumber(k) then return rawget(t, k)
-		elseif vector_indices[k] then return rawget(t, vector_indices[k])
-		else return getmetatable(t)[k]
+    if tonumber(k) then
+      return rawget(t, k)
+    elseif vector_indices[k] then
+      return rawget(t, vector_indices[k])
+    else
+      return getmetatable(t)[k]
     end
   end,
   __newindex      = function(t, k, v)
-		if tonumber(k) then rawset(t, k, v)
-		elseif vector_indices[k] then rawset(t, vector_indices[k], v)
-		else return
+    if tonumber(k) then
+      rawset(t, k, v)
+    elseif vector_indices[k] then
+      rawset(t, vector_indices[k], v)
+    else
+      return
     end
   end,
-	__add = vector_opnnn('add', function(x1, x2) return x1+x2 end),
-	__sub = vector_opnnn('sub', function(x1, x2) return x1-x2 end),
-	__mul = vector_opnxn('mul', function(x1, x2) return x1*x2 end),
-	__div = vector_opnxn('div', function(x1, x2) return x1/x2 end),
-	__pow = vector_opnxn('pow', function(x1, x2) return x1^x2 end),
+  __add           = vector_opnnn('add', function(x1, x2) return x1 + x2 end),
+  __sub           = vector_opnnn('sub', function(x1, x2) return x1 - x2 end),
+  __mul           = vector_opnxn('mul', function(x1, x2) return x1 * x2 end),
+  __div           = vector_opnxn('div', function(x1, x2) return x1 / x2 end),
+  __pow           = vector_opnxn('pow', function(x1, x2) return x1 ^ x2 end),
   __unm           = vector_opn0n('inv', function(x1) return -x1 end),
   __concat        = nil,
   --__len = function(v1) return #v1 end,
@@ -92,7 +100,7 @@ local vector_meta = {
   __eq            = function(v1, v2)
     local len = vector_checksamelen(v1, v2, 'equals')
     for i = 1, len do
-			if v1[i]~=v2[i] then return false end
+      if v1[i] ~= v2[i] then return false end
     end
     return true
   end,
@@ -105,7 +113,7 @@ local vector_meta = {
     local len = #v1
     local l = 0
     for i = 1, len do
-			l = l + v1[i]^2
+      l = l + v1[i] ^ 2
     end
     return math.sqrt(l)
   end,
@@ -115,8 +123,11 @@ local vector_meta = {
     local len = #v1
     local v3 = {}
     for i = 1, len do
-			if length==0 then v3[i] = 0
-			else v3[i] = v1[i]/length end
+      if length == 0 then
+        v3[i] = 0
+      else
+        v3[i] = v1[i] / length
+      end
     end
     return vector_new(v3)
   end,
@@ -127,48 +138,56 @@ local vector_meta = {
     for i = 1, len do
       table.insert(st, tostring(v1[i]))
     end
-		return 'vector{ '..table.concat(st, ', ')..' }'
+    return 'vector{ ' .. table.concat(st, ', ') .. ' }'
   end,
   unpack          = function(v1) return unpack(v1) end,
   floor           = vector_opn0n('floor', function(x1) return math.floor(x1) end),
-	ceil  = vector_opn0n('ceil' , function(x1) return math.ceil (x1) end),
-	round = vector_opn0n('round', function(x1) return math.floor(x1+0.5) end),
+  ceil            = vector_opn0n('ceil', function(x1) return math.ceil(x1) end),
+  round           = vector_opn0n('round', function(x1) return math.floor(x1 + 0.5) end),
   dot             = function(v1, v2)
     local len = vector_checksamelen(v1, v2, 'dot')
     local x = 0
     for i = 1, len do
-			x = x + v1[i]*v2[i]
+      x = x + v1[i] * v2[i]
     end
     return x
   end,
   cross           = function(v1, v2)
     vector_checklen(v1, v2, 'cross', 3)
-		return vector_new{
-			v1[2]*v2[3] - v1[3]*v2[2],
-			v1[3]*v2[1] - v1[1]*v2[3],
-			v1[1]*v2[2] - v1[2]*v2[1],
+    return vector_new {
+      v1[2] * v2[3] - v1[3] * v2[2],
+      v1[3] * v2[1] - v1[1] * v2[3],
+      v1[1] * v2[2] - v1[2] * v2[1],
     }
   end,
   rotateByAngleId = function(v1, r)
     --vector_check(v1, 2, 'rotate')
-		if type(r)~='number' or r%1~=0 then
-			error('vector rotateByAngleId: invalid rotation '..tostring(r), 2) end
-		r = r%4
+    if type(r) ~= 'number' or r % 1 ~= 0 then
+      error('vector rotateByAngleId: invalid rotation ' .. tostring(r), 2)
+    end
+    r = r % 4
     local v2
-		if     r==0 then v2 = vector_new{  v1[1],  v1[2], v1[3] }
-		elseif r==1 then v2 = vector_new{  v1[2], -v1[1], v1[3] }
-		elseif r==2 then v2 = vector_new{ -v1[1], -v1[2], v1[3] }
-		elseif r==3 then v2 = vector_new{ -v1[2],  v1[1], v1[3] }
-		else error('vector rotateByAngleId: invalid rotation '..r, 2) end
+    if r == 0 then
+      v2 = vector_new { v1[1], v1[2], v1[3] }
+    elseif r == 1 then
+      v2 = vector_new { v1[2], -v1[1], v1[3] }
+    elseif r == 2 then
+      v2 = vector_new { -v1[1], -v1[2], v1[3] }
+    elseif r == 3 then
+      v2 = vector_new { -v1[2], v1[1], v1[3] }
+    else
+      error('vector rotateByAngleId: invalid rotation ' .. r, 2)
+    end
     return v2
   end,
   rotateZ         = function(v, r)
     --vector_check(v, 2, 'rotate2d')
-		if type(r)~='number' then
-			error('vector rotateZ: invalid rotation '..tostring(r), 2) end
-		local len = math.sqrt(v[1]^2 + v[2]^2)
+    if type(r) ~= 'number' then
+      error('vector rotateZ: invalid rotation ' .. tostring(r), 2)
+    end
+    local len = math.sqrt(v[1] ^ 2 + v[2] ^ 2)
     local ang = math.atan2(v[2], v[1]) + r
-		local v2 = vector_new{ math.cos(ang)*len, math.sin(ang)*len }
+    local v2 = vector_new { math.cos(ang) * len, math.sin(ang) * len }
     return v2
   end,
   tsString        = function(v)
@@ -178,8 +197,8 @@ local vector_meta = {
   distance        = function(v1, v2)
     local len = vector_checksamelen(v1, v2, 'distance')
     local sum = 0
-		for i=1,len do
-			sum = sum + (v1[i] - v2[i])^2
+    for i = 1, len do
+      sum = sum + (v1[i] - v2[i]) ^ 2
     end
     return math.sqrt(sum)
   end,
@@ -190,21 +209,21 @@ local vector_meta = {
 }
 vector_new = function(vi)
   if vi then
-		if type(vi)=='string' then
+    if type(vi) == 'string' then
       local vi2 = {}
       for val in vi:gmatch('[0-9%.%-e]+') do
         table.insert(vi2, tonumber(val))
       end
       vi = vi2
-		elseif type(vi)~='table' then
-			error('vector: argument #1: expected input table, got '..type(vi), 2)
+    elseif type(vi) ~= 'table' then
+      error('vector: argument #1: expected input table, got ' .. type(vi), 2)
     end
     local v = {}
-		if #vi>0 then
+    if #vi > 0 then
       for i = 1, #vi do v[i] = vi[i] end
     else
       for n, i in pairs(vector_indices) do v[i] = vi[n] end
-			if #v==0 then
+      if #v == 0 then
         error('vector: argument #1: table contains no values', 2)
       end
     end