# MAX_SIZE is the max size of the followers.
  # CATERPILLAR is the switch to turn on or off followers. The default is 2
  #--------------------------------------------------------------------------
  # * Constants
  #--------------------------------------------------------------------------
  MAX_SIZE = 8
  CATERPILLAR = 2

class Game_Player
  #--------------------------------------------------------------------------
  # * Move Down
  #     turn_enabled : a flag permits direction change on that spot
  #--------------------------------------------------------------------------
  def move_down(turn_enabled = true)    
    super(turn_enabled)
  end
  #--------------------------------------------------------------------------
  # * Move Left
  #     turn_enabled : a flag permits direction change on that spot
  #--------------------------------------------------------------------------
  def move_left(turn_enabled = true)
    super(turn_enabled)
  end
  #--------------------------------------------------------------------------
  # * Move Right
  #     turn_enabled : a flag permits direction change on that spot
  #--------------------------------------------------------------------------
  def move_right(turn_enabled = true)
    super(turn_enabled)
  end
  #--------------------------------------------------------------------------
  # * Move up
  #     turn_enabled : a flag permits direction change on that spot
  #--------------------------------------------------------------------------
  def move_up(turn_enabled = true)
    super(turn_enabled)
  end
  #--------------------------------------------------------------------------
  # * Move Lower Left
  #--------------------------------------------------------------------------
  def move_lower_left
    super
  end
  #--------------------------------------------------------------------------
  # * Move Lower Right
  #--------------------------------------------------------------------------
  def move_lower_right
    super
  end
  #--------------------------------------------------------------------------
  # * Move Upper Left
  #--------------------------------------------------------------------------
  def move_upper_left
    super
  end
  #--------------------------------------------------------------------------
  # * Move Upper Right
  #--------------------------------------------------------------------------
  def move_upper_right
    super
  end
end

class Game_Follower < Game_Character
  #--------------------------------------------------------------------------
  # * Public Instance Variables
  #--------------------------------------------------------------------------
  attr_reader   :actor
  attr_accessor :move_speed
  #--------------------------------------------------------------------------
  # * Object Initialization
  #--------------------------------------------------------------------------
  def initialize(actor)
    super()
    @through = true
    @actor = actor
  end
  #--------------------------------------------------------------------------
  # * Set Actor
  #--------------------------------------------------------------------------
  def actor=(actor)
    @actor = actor
    setup
  end
  #--------------------------------------------------------------------------
  # * Setup
  #--------------------------------------------------------------------------
  def setup
    if @actor != nil      
      @character_name = $game_actors[@actor].character_name
      @character_index = $game_actors[@actor].character_index
    else
      @character_name = ""
      @character_index = 0
    end
    @opacity = 255
    @blend_type = 0
    @priority_type = 0
  end
  
  #--------------------------------------------------------------------------
  # * Screen Z
  #--------------------------------------------------------------------------
  def screen_z
    if $game_player.x == @x and $game_player.y == @y
      return $game_player.screen_z - 1
    end
    super
  end
  #--------------------------------------------------------------------------
  # * Same Position Starting Determinant (Disabled)
  #--------------------------------------------------------------------------
  def check_event_trigger_here(triggers)
    result = false
    return result
  end
  #--------------------------------------------------------------------------
  # * Front Envent Starting Determinant (Disabled)
  #--------------------------------------------------------------------------
  def check_event_trigger_there(triggers)
    result = false
    return result
  end
  #--------------------------------------------------------------------------
  # * Touch Event Starting Determinant (Disabled)
  #--------------------------------------------------------------------------
  def check_event_trigger_touch(x, y)
    result = false
    return result
  end
end

class Spriteset_Map
  alias_method :spriteset_map_create_characters, :create_characters
  def create_characters
    spriteset_map_create_characters
    $game_party.followers.each do |char|
      @character_sprites << Sprite_Character.new(@viewport1, char)
    end
  end
end

class Game_Party

  #--------------------------------------------------------------------------
  # * Public Instance Variables
  #--------------------------------------------------------------------------
  attr_reader :followers
  #--------------------------------------------------------------------------
  # * Object Initialization
  #--------------------------------------------------------------------------
  alias_method :trick_caterpillar_party_initialize, :initialize
  def initialize
    trick_caterpillar_party_initialize
    @followers = Array.new(MAX_SIZE - 1) {Game_Follower.new(nil)}
    @move_list = []
  end
  #--------------------------------------------------------------------------
  # * Update Followers
  #--------------------------------------------------------------------------
  def update_followers
    flag = $game_player.transparent || $game_switches[CATERPILLAR]
    @followers.each_with_index do |char, i|
      char.actor = @actors[i + 1]
      char.move_speed = $game_player.move_speed
      if $game_player.dash?
        char.move_speed += 1
      end
      char.update
      char.transparent = flag
    end
  end
  #--------------------------------------------------------------------------
  # * Move To Party 
  #--------------------------------------------------------------------------
  def moveto_party(x, y)
    @followers.each {|char| char.moveto(x, y)}
    @move_list.clear
  end
  #--------------------------------------------------------------------------
  # * Move Party 
  #--------------------------------------------------------------------------
  def move_party
    @move_list.each_index do |i|
      if @followers[i] == nil
        @move_list[i...@move_list.size] = nil
        next
      end
      case @move_list[i].type
      when 2
        @followers[i].move_down(*@move_list[i].args)
      when 4
        @followers[i].move_left(*@move_list[i].args)
      when 6
        @followers[i].move_right(*@move_list[i].args)
      when 8
        @followers[i].move_up(*@move_list[i].args)
      when j
        @followers[i].move_lower_left
      when 3
        @followers[i].move_lower_right
      when 7
        @followers[i].move_upper_left
      when 9
        @followers[i].move_upper_right
      when 5
        @followers[i].jump(*@move_list[i].args)
      end
    end
  end
  #--------------------------------------------------------------------------
  # * Add Move List
  #--------------------------------------------------------------------------
  def update_move(type, *args)
    move_party
    @move_list.unshift(Game_MoveListElement.new(type, args))
  end
end

class Game_MoveListElement
  #--------------------------------------------------------------------------
  # * Object Initialization
  #--------------------------------------------------------------------------
  def initialize(type, args)
    @type = type
    @args = args
  end
  #--------------------------------------------------------------------------
  # * Type
  #--------------------------------------------------------------------------
  def type
    return @type 
  end
  #--------------------------------------------------------------------------
  # * Args
  #--------------------------------------------------------------------------
  def args
    return @args
  end
end

class Game_Player
  #--------------------------------------------------------------------------
  # * Public Instance Variables
  #--------------------------------------------------------------------------
  attr_reader :move_speed
  
  #--------------------------------------------------------------------------
  # * Update
  #--------------------------------------------------------------------------
  alias_method :trick_caterpillar_player_update, :update
  def update
    $game_party.update_followers
    trick_caterpillar_player_update
  end
  #--------------------------------------------------------------------------
  # * Moveto
  #--------------------------------------------------------------------------
  alias_method :trick_caterpillar_player_moveto, :moveto
  def moveto(x, y)
    $game_party.moveto_party(x, y)
    trick_caterpillar_player_moveto(x, y)
  end
  #--------------------------------------------------------------------------
  # * Move Down
  #-------------------------------------------------------------------------- 
  alias_method :trick_caterpillar_player_move_down, :move_down
  def move_down(turn_enabled = true)
    if passable?(@x, @y+1)
      $game_party.update_move(2, turn_enabled)
    end    
    trick_caterpillar_player_move_down(turn_enabled)    
  end
  #--------------------------------------------------------------------------
  # * Move Left
  #--------------------------------------------------------------------------
  alias_method :trick_caterpillar_player_move_left, :move_left
  def move_left(turn_enabled = true)
    if passable?(@x-1, @y)
      $game_party.update_move(4, turn_enabled)
    end
    trick_caterpillar_player_move_left(turn_enabled)
  end
  #--------------------------------------------------------------------------
  # * Move Right
  #--------------------------------------------------------------------------
  alias_method :trick_caterpillar_player_move_right, :move_right
  def move_right(turn_enabled = true)
    if passable?(@x+1, @y)
      $game_party.update_move(6, turn_enabled)
    end
    trick_caterpillar_player_move_right(turn_enabled)
  end
  #--------------------------------------------------------------------------
  # * Move Up
  #--------------------------------------------------------------------------
  alias_method :trick_caterpillar_player_move_up, :move_up
  def move_up(turn_enabled = true)
    if passable?(@x, @y-1)
      $game_party.update_move(8, turn_enabled)
    end
    trick_caterpillar_player_move_up(turn_enabled)
  end
  #--------------------------------------------------------------------------
  # * Move Lower Left
  #--------------------------------------------------------------------------
  alias_method :trick_caterpillar_player_move_lower_left, :move_lower_left
  def move_lower_left
    if passable?(@x - 1, @y) and passable?(@x, @y + 1)
      $game_party.update_move(1)
    end
    trick_caterpillar_player_move_lower_left
  end
  #--------------------------------------------------------------------------
  # * Move Lower Right
  #--------------------------------------------------------------------------
  alias_method :trick_caterpillar_player_move_lower_right, :move_lower_right
  def move_lower_right
    if passable?(@x + 1, @y) and passable?(@x, @y + 1)
      $game_party.update_move(3)
    end
    trick_caterpillar_player_move_lower_right
  end
  #--------------------------------------------------------------------------
  # * Move Upper Left
  #--------------------------------------------------------------------------
  alias_method :trick_caterpillar_player_move_upper_left, :move_upper_left
  def move_upper_left
    if passable?(@x - 1, @y) and passable?(@x, @y - 1)
      $game_party.update_move(7)
    end
    trick_caterpillar_player_move_upper_left
  end
  #--------------------------------------------------------------------------
  # * Move Upper Right
  #--------------------------------------------------------------------------
  alias_method :trick_caterpillar_player_move_upper_right, :move_upper_right
  def move_upper_right
    if passable?(@x + 1, @y) and passable?(@x, @y - 1)
      $game_party.update_move(9)
    end
    trick_caterpillar_player_move_upper_right
  end
  #--------------------------------------------------------------------------
  # * Jump
  #--------------------------------------------------------------------------
  alias_method :trick_caterpillar_player_jump, :jump
  def jump(x_plus, y_plus)
    new_x = @x + x_plus
    new_y = @y + y_plus
    if (x_plus == 0 and y_plus == 0) or passable?(new_x, new_y)
      $game_party.update_move(5, x_plus, y_plus)
    end
    trick_caterpillar_player_jump(x_plus, y_plus)
  end
end