anchor.diff:  	echo  4. Recast navigation
   	echo  5. CMFT
   	echo  6. PhysX
  +	echo  7. LuaJIT
   	echo ===============================
   	choice /C 1234567 /N /M "Your choice:"
   	echo.
  
positive.code: 	if %errorlevel%==4 call :recast
  	if %errorlevel%==5 call :cmft
  	if %errorlevel%==6 call :physx
  goto :third_party
  
  :all_3rdparty
  
negative.code: 	call :download_nvtt
  	call :download_cmft
  	call :download_recast
  	call :download_luajit
  	
  	call :build_physx
  	call :build_nvtt
  	call :build_cmft
  	call :build_recast
  	call :build_luajit
  	
  	call :deploy_physx
  	call :deploy_nvtt
  	call :deploy_cmft
  	call :deploy_recast
  	call :deploy_luajit
  	pause
  
  exit /B 0
  
  :luajit
  	cls
  	echo LuaJIT
  	echo ===============================
  	echo  1. Go back
  	echo  2. Download
  	echo  3. Build
  	echo  4. Deploy
  	echo  5. Open in VS
  	echo ===============================
  	choice /C 12345 /N /M "Your choice:"
  	echo.
  	if %errorlevel%==1 exit /B 0
  	if %errorlevel%==2 call :download_luajit
  	if %errorlevel%==3 call :build_luajit
  	if %errorlevel%==4 call :deploy_luajit
  	REM if %errorlevel%==5 start "" %devenv_cmd% "3rdparty\luajit\\compiler\vc15win64\PhysXSDK.sln"
  	pause
  goto :luajit
  
  :deploy_luajit
  	copy 3rdparty\luajit\src\lua51.lib ..\external\luajit\lib\win64_vs2017\release\
  	copy 3rdparty\luajit\src\luajit.lib ..\external\luajit\lib\win64_vs2017\release\
  	copy 3rdparty\luajit\src\lauxlib.h ..\external\luajit\include
  	copy 3rdparty\luajit\src\lua.h ..\external\luajit\include
  	copy 3rdparty\luajit\src\lua.hpp ..\external\luajit\include
  	copy 3rdparty\luajit\src\luaconf.h ..\external\luajit\include
  	copy 3rdparty\luajit\src\luajit.h ..\external\luajit\include
  	copy 3rdparty\luajit\src\lualib.h ..\external\luajit\include
  exit /B 0
  
  :build_luajit
  	pushd 3rdparty\luajit\src
  	call msvcbuild.bat
  	popd
  exit /B 0
  
  :download_luajit
  	if not exist 3rdparty mkdir 3rdparty
  	cd 3rdparty
  	if not exist luajit (
  		git.exe clone https://github.com/LuaJIT/LuaJIT.git luajit
  	) else (
  		cd luajit
  		git pull
  		cd ..
  	)
  	cd ..
  exit /B 0
  
  :physx
  