[RGSS] Custom Resolution - Map Zoom

#==============================================================================
# ** Custom Resolution - Map Zoom
# Version : 1.04
# Author : LiTTleDRAgo
#==============================================================================
#
# Introduction :
#
#   As the name stated, this script zooms the map and player in the screen
#
# How to Use :
#
#   Script :
#      zoom(ZOOM)    # As an Integer (1-12)
#
# Note :
#
#   Float zoom values will cause some glitch in the map
#
#==============================================================================
($imported ||= {})[:drg_cr_map_zoom] = 1.04

core = "This script needs Drago - Core Engine ver 1.43 or above"
reso = "This script needs F0's Custom Resolution ver 0.97a or above"
rmxp = "This script only for RMXP"

($imported[:drg_core_engine] || 0) >= 1.43   || raise(core)
$resolution &&  $resolution.version >= 0.971 || raise(reso)
LiTTleDRAgo::XP                              || raise(rmxp)
#==============================================================================
# ** Sprite_Character
#------------------------------------------------------------------------------
#  This sprite is used to display the character.It observes the Game_Character
#  class and automatically changes sprite conditions.
#==============================================================================
class Sprite_Character
  #--------------------------------------------------------------------------
  # * Alias Listing
  #--------------------------------------------------------------------------
  alias_sec_method(:zoom_update_scrolling, :update)
  #--------------------------------------------------------------------------
  # * Aliased method: update
  #--------------------------------------------------------------------------
  def update(*args)
    zoom_update_scrolling(*args)
    # Update character sprites
    self.zoom_x = $game_map.zoom_x
    self.zoom_y = $game_map.zoom_y
  end
end

#==============================================================================
# ** Game_Map
#------------------------------------------------------------------------------
#  This class handles the map. It includes scrolling and passable determining
#  functions. Refer to "$game_map" for the instance of this class.
#==============================================================================
class Game_Map
  #--------------------------------------------------------------------------
  # * New method: zoom
  #--------------------------------------------------------------------------
  def zoom(zoom=1.0)
    @zoom_x = [[zoom, 1].max,12].min.round
    @zoom_y = [[zoom, 1].max,12].min.round
  end
  #--------------------------------------------------------------------------
  # * New method: zoom_in
  #--------------------------------------------------------------------------
  def zoom_in
    zoom(@zoom_x + 1)
  end
  #--------------------------------------------------------------------------
  # * New method: zoom_out
  #--------------------------------------------------------------------------
  def zoom_out
    zoom(@zoom_x - 1)
  end
end
#==============================================================================
# ** Interpreter
#------------------------------------------------------------------------------
#  This interpreter runs event commands. This class is used within the
#  Game_System class and the Game_Event class.
#==============================================================================

class Interpreter
  #--------------------------------------------------------------------------
  # * Redirect Listing
  #--------------------------------------------------------------------------
  redirect_method :zoom,     '$game_map.zoom'
  redirect_method :zoom_in,  '$game_map.zoom_in'
  redirect_method :zoom_out, '$game_map.zoom_out'
end

#==============================================================================
# ** Game_Character
#------------------------------------------------------------------------------
#  This class deals with characters. It's used as a superclass for the
#  determinants and map scrolling. Refer to "$game_player" for the one
#  Game_Player and Game_Event classes.
#==============================================================================
class Game_Character
  #--------------------------------------------------------------------------
  # * Alias Listing
  #--------------------------------------------------------------------------
  alias_sec_method(:screen_x_before_zoom, :screen_x)
  alias_sec_method(:screen_y_before_zoom, :screen_y)
  alias_sec_method(:screen_z_before_zoom, :screen_z)
  #--------------------------------------------------------------------------
  # * Aliased method: screen_x
  #--------------------------------------------------------------------------
  def screen_x(*args)
    # Get screen coordinates from real coordinates and map display position
    screen_x_before_zoom(*args) * $game_map.zoom_x
  end
  #--------------------------------------------------------------------------
  # * Aliased method: screen_y
  #--------------------------------------------------------------------------
  def screen_y(*args)
    # Get screen coordinates from real coordinates and map display position
    screen_y_before_zoom(*args) * $game_map.zoom_y
  end
  #--------------------------------------------------------------------------
  # * Overwriten method: screen_z
  #--------------------------------------------------------------------------
  def screen_z(height = 0)
    # If display flag on closest surface is ON
    if @always_on_top
      # 999, unconditional
      return 999
    end
    # Get screen coordinates from real coordinates and map display position
    z = (@real_y - $game_map.display_y + 3) * $game_map.zoom_y / 4 + 32
    # If tile
    if @tile_id > 0
      # Add tile priority * 32
      return z  + $game_map.priorities[@tile_id] * 32
    # If character
    else
      # If height exceeds 32, then add 31
      return z + ((height > 32) ? 31 : 0)
    end
  end
end
#==============================================================================
# ** Spriteset_Map
#------------------------------------------------------------------------------
#  This class brings together map screen sprites, tilemaps, etc.
#  It's used within the Scene_Map class.
#==============================================================================

class Spriteset_Map
  #--------------------------------------------------------------------------
  # * Alias Listing
  #--------------------------------------------------------------------------
  alias_sec_method(:zoom_update_scrolling, :update)
  #--------------------------------------------------------------------------
  # * Aliased method: update
  #--------------------------------------------------------------------------
  def update(*args)
    zoom_update_scrolling(*args)
    @fog.zoom_x *= $game_map.zoom_x
    @fog.zoom_y *= $game_map.zoom_y
    @panorama.zoom_x *= $game_map.zoom_x
    @panorama.zoom_y *= $game_map.zoom_y
  end
end