Theo - Fog Menu

# =============================================================================
# TheoAllen - Fog menu
# Version : 1.0
# Contact : www.rpgmakerid.com (or) http://theolized.blogspot.com
# (This script documentation is written in informal indonesian language)
# =============================================================================
($imported ||= {})[:Theo_FogMenu] = true
# =============================================================================
# CHANGE LOGS:
# -----------------------------------------------------------------------------
# 2013.05.24 - Started and Finished script
# =============================================================================
=begin

  Perkenalan :
  Script ini ngebikin kamu bisa nampilin fog di menu.

  Cara penggunaan :
  Pasang di bawah material namun di atas main
  Edit konfigurasinya

  Dibawah ini untuk penggunaan script call. kalo sewaktu-waktu u pengen ganti
  fog menu pas di tengah permainan.

  - $game_system.fog_menu_name      = "namafilenya"
  - $game_system.fog_menu_opacity   = (0 s.d 255)
  - $game_system.fog_menu_scroll_x  = (bilangan bulat)
  - $game_system.fog_menu_scroll_y  = (bilangan bulat)
  - $game_system.fog_menu_variance  = (bilangan bulat)
  - $game_system.fog_menu_speed     = (bilangan bulat)
  - $game_system.fog_behind_menu    = (true/false)

  Terms of use :
  Credit gw, TheoAllen. Kalo semisal u bisa ngedit2 script gw trus jadi lebih
  keren, terserah. Ane bebasin. Asal ngga ngeklaim aja. Kalo semisal mau
  dipake buat komersil, jangan lupa, gw dibagi gratisannya.

=end
# =============================================================================
# Konfigurasi :
# =============================================================================
module THEO
  module FOG

    FOG_NAME      = "fogx"  # Nama fog (harus ada di Graphics/picture)
    FOG_OPACITY   = 255     # Opacity fognya
    FOG_SCROLL_X  = -1      # Loop horizontal (minus = ke kanan)
    FOG_SCROLL_Y  = -1      # Loop vertikal (minus = ke bawah)

    OPACITY_VARIANCE  = 0   # Variasi opacitynya
    FADE_SPEED        = 1   # Kecepatan berubah opacitynya

    BEHIND_MENU     = true  # Set true kalo pengen fog ada di belakang menu
    HIDE_SWITCH_ID  = 0     # Fog di sembunyiin kalo switch dengan id ini ON

  end
end
# =============================================================================
# Akhir dari konfigurasi. Jangan diedit kecuali ente ngerti
# =============================================================================
class Game_System
  attr_accessor :fog_menu_name
  attr_accessor :fog_menu_opacity
  attr_accessor :fog_menu_scroll_x
  attr_accessor :fog_menu_scroll_y
  attr_accessor :fog_menu_variance
  attr_accessor :fog_menu_speed
  attr_accessor :fog_behind_menu

  include THEO::FOG

  alias pre_fog_menu_init initialize
  def initialize
    pre_fog_menu_init
    init_fog_menu_member
  end

  def init_fog_menu_member
    @fog_menu_name = FOG_NAME
    @fog_menu_opacity = FOG_OPACITY
    @fog_menu_scroll_x = FOG_SCROLL_X
    @fog_menu_scroll_y = FOG_SCROLL_Y
    @fog_menu_variance = OPACITY_VARIANCE
    @fog_menu_speed = FADE_SPEED
    @fog_behind_menu = BEHIND_MENU
  end

end

class Scene_MenuBase < Scene_Base

  alias pre_fog_menu_start start
  def start
    pre_fog_menu_start
    create_fog_menu
    @fog_count = 0
  end

  def create_fog_menu
    @fog_menu = Plane.new($game_system.fog_behind_menu ? nil : @viewport)
    @fog_menu.bitmap = Cache.picture($game_system.fog_menu_name) rescue return
    @fog_menu.opacity = $game_system.fog_menu_opacity
  end

  alias pre_fog_update update
  def update
    pre_fog_update
    update_fog_menu
  end

  def update_fog_menu
    update_fog_scroll
    update_fog_opacity
    update_fog_visibility
  end

  def update_fog_scroll
    @fog_menu.ox += $game_system.fog_menu_scroll_x
    @fog_menu.oy += $game_system.fog_menu_scroll_y
  end

  def update_fog_opacity
    derajat = (@fog_count.to_f/180) * Math::PI
    @fog_menu.opacity = $game_system.fog_menu_opacity +
      (Math.sin(derajat) * $game_system.fog_menu_variance)
    @fog_count += (rand * $game_system.fog_menu_speed)
  end

  def update_fog_visibility
    @fog_menu.visible = !$game_switches[THEO::FOG::HIDE_SWITCH_ID]
  end

  alias pre_fog_terminate terminate
  def terminate
    dispose_fog_menu
    pre_fog_terminate
  end

  def dispose_fog_menu
    @fog_menu.dispose
  end

end