Dynamic Variables [RPG Maker VX Ace]

dynamic_variables.rb

if true #Set to false to disable script.
# (C) Copyright Erisa A (Seriel) 2019
###############################################################################
# Seriel ~ Dynamic Variables                                                  #
#   See under this notice for some help.                                      #
#=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
# The code here can be reused for any purpose, with credit given.             #
# This includes both Commercial and Non-Commercial use.                       #
# However, contact is appreciated before Commercial use.                      #
# Modified versions must give credit, however it must not be implied that the #
#  modifications were carried out by me.                                      #
#=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
# Contact:           |  [email protected]                                        #
#=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
# Created with ♥ by Erisa A (Seriel) in 2019                                  #
# Last edited: 2019-01-15 19:16:53 +0000                                      #
#=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
# This script works by intercepting any call to get a variable and replacing  #
#   the result with the result of whatever script you have specified below.   #
# Using this, you can create "Dynamic" variables which change based on        #
#   different factors, for example a variable which always displays the       #
#   current map ID, or the health of the first party member.                  #
# Due to the nature of how this works, trying to set one of these variables   #
#   to a specific value in-game will NOT WORK. These only support get.        #
###############################################################################

# Config is down here somewhere :)
module Serie_DynVar
  ## START CONFIG
  
  # Make sure to add a comma on the end of the previous line.
  # Basic format:
  # 1 => "script_to_execute", 
  # No comma on the last one!
  VAR_ASSIGNMENTS = {
    500 => "$game_map.map_id",
    501 => "$game_party.members[0].hp"
  }
  
  ## END CONFIG
end


#==============================================================================
# ** Game_Variables
#------------------------------------------------------------------------------
#  This class handles variables. It's a wrapper for the built-in class "Array."
# The instance of this class is referenced by $game_variables.
#==============================================================================

class Game_Variables
  alias :eri_getvar :[]
  
  #--------------------------------------------------------------------------
  # * Get Variable
  #--------------------------------------------------------------------------
  def [](variable_id)
    if Serie_DynVar::VAR_ASSIGNMENTS.key?(variable_id)
      eval(Serie_DynVar::VAR_ASSIGNMENTS[variable_id])
    else
      eri_getvar(variable_id)
    end
  end
  
end

end # if true