HorrorVale enemy animation extended

#-------------------------------------------------------------------------------
# Don't remove this header!
#-------------------------------------------------------------------------------
# Enemy Animation Extension Script
# by Trihan
#
# Version : 1.0
#
# This script is commissioned by Batworks Software.
#-------------------------------------------------------------------------------

#-------------------------------------------------------------------------------
# Version History
#-------------------------------------------------------------------------------
# 1.0 - Initial script.
#-------------------------------------------------------------------------------

#-------------------------------------------------------------------------------
# To use a custom enemy animation, set the notetag to <motion standby: 3>.
#
# The script automatically sets up frames based on the original battler name,
# which will not need to be changed. For example, if your battler is
# "bigfootbattle" you can define an image as part of that animation simply by
# calling it "bigfootbattle1" where 1 is any number. The numbers do not have
# to be sequential, but frames will be added in folder order.
#
# Set the Anim_Interval constant to the number of frames between cel changes.
#
# Note that for enemy transforms, you don't need the motion standby tag for
# later forms; it'll take the motion type from the original enemy.
#-------------------------------------------------------------------------------
module TLBAnimExt
#-------------------------------------------------------------------------------
#  Config

   Anim_Interval = 15

#  ** End Config **
#
# WARNING: Editing anything beyond this point may result in the script no
# longer functioning as intended.
#-------------------------------------------------------------------------------
end

class Game_Enemy < Game_Battler
  attr_accessor :current_cel
  attr_accessor :frame_count
  attr_accessor :arr_battlers

  alias :tlb_animext_game_enemy_initialize :initialize
  def initialize(index, enemy_id)
    tlb_animext_game_enemy_initialize(index, enemy_id)
    @current_cel = nil
    @frame_count = nil
    @arr_battlers = []
    setup_animation
  end

  def setup_animation
    if @motion_stand[0] == 3
      @arr_battlers = []
      @current_cel = 0
      @frame_count = TLBAnimExt::Anim_Interval
      regexpattern = /#{@battler_name}\d+/
      files = Dir.entries("Graphics/Battlers")
      .select { |file| file =~ regexpattern }
      files.each { |file|
        @arr_battlers.push(file)
      }
      @battler_name = @arr_battlers[0] if @arr_battlers.size > 0
    end
  end

  def set_battler(battler_name)
    @battler_name = battler_name
  end

  alias :tlb_animext_game_enemy_transform :transform
  def transform(enemy_id)
    tlb_animext_game_enemy_transform(enemy_id)
    setup_animation
  end
end

class Sprite_Battler < Sprite_Base
  def execute_motion_idle
    case @battler.motion_stand[0]
      when 0
        update_motion_breath
      when 1
        update_motion_float
      when 2
        update_motion_side
      when 3
        update_motion_anim
    end
  end

  def update_motion_anim
    @battler.frame_count -= 1
    return if @battler.frame_count > 0
    @battler.frame_count = TLBAnimExt::Anim_Interval
    @battler.current_cel += 1
    @battler.current_cel = 0 if @battler.current_cel >= @battler.arr_battlers.size
  end

  alias :tlb_animext_sprite_battler_update_bitmap :update_bitmap
  def update_bitmap
    tlb_animext_sprite_battler_update_bitmap
    @battler.set_battler(@battler.arr_battlers[@battler.current_cel]) if @battler.arr_battlers.size > 0
  end
end