Here is a list of all variables with links to the files they belong to:

• al_attribute_names : openal_utils.cpp
• global_logger : logger.cpp, logger.hpp
• keyboard : input_state.cpp
• keyboard_key_str_to_key_enum : input_state.cpp
• level_to_string : logger.hpp
• openal_format_enum_to_string : load_sound_file.cpp
• two_pi : transform.cpp