[VX][Beta]Tankentai Realistic Shadow

=begin
================================================================================
                  wltr3565's Tankentai Realistic Shadow
                                v0.2 VX
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This script is a mere eye candy, simply to make Tankentai's battler shadows true
to the battlers' original sprites. But I'm very sure this is not perfect yet.
This version, v0.1, is open to public to be tested for more improvements. Alas,
this script is not perfect. I lack the experience to straightly configure bitmap
drawing. I cannot make sprites slanted as in photoshop. This is the best that I
can do in RGSS2. Please do give feedbacks for further improvements, especially
bugs.

Do free to use it for your own purpose. Just credit me, and watch out for bugs.
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Features:
- Easy to install; Just insert this below Tankentai.
- Make shadows realistic, true to their real form.
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Notes:
- Realistic shadows means making the process heavier than simple shadows. It's
  not recommended yet for low-end PCs.
- The shadows may be misplaced. You can configure the positions by adjusting
  the shadows' position in SBS Battler Configuration.
- Don't ask about this script's compatibility between Kaduki Tankentai, Default
  Tankentai, etc. THIS IS OBVIOUSLY COMPATIBLE FOR ALL VERSIONS OF TANKENTAI!!!
  Except you have a script that do something with shadows.
- It is recommeded to use detailed sprites (Not chibi style e.g. Kaduki's) with
  this script.
- For now it only shades greatly for northern (from screen) source of light.
- This is for RMVX version of Tankentai, and thus, for RMVX only.
================================================================================
=end
module WLTR
  SHADE_PERSPECTIVE = 0.4 # Simply the shadow's vertical zoom, for perspective.
end

class Sprite_Battler < Sprite_Base
  def make_shadow
    @shadow.dispose if @shadow != nil
    @battler_hue = @battler.battler_hue
    @shadow = Sprite.new(viewport)
    @shadow.z = self.z - 4
    @shadow.visible = false
    # バトラーに当てられた影グラフィックを用意
    @shadow.bitmap = self.bitmap
    @shadow.src_rect = self.src_rect
    @shadow_height = @shadow.bitmap.height
    # 影位置の微調整用インスタンス
    @shadow_plus_x = @battler.shadow_plus[0] - @width / 2
    @shadow_plus_y = @battler.shadow_plus[1]
    # 更新
    @shadow.zoom_x = self.zoom_x
    @shadow.zoom_y = WLTR::SHADE_PERSPECTIVE * self.zoom_y
    @shadow.tone.set(-255, -255, -255)
    @shadow.visible = false if @battler.shadow == ""
    update_shadow
  end
 
  def update_shadow
    @shadow.opacity = 108 * self.opacity / 255
    @shadow.angle = 180 - self.angle
    @shadow.src_rect = self.src_rect
    @shadow.mirror = true
    @shadow.ox = @width - self.ox
    @shadow.oy = self.oy
    @shadow.visible = false if @battler.shadow == ""
    @shadow.zoom_x = self.zoom_x
    @shadow.zoom_y = WLTR::SHADE_PERSPECTIVE * self.zoom_y
    @shadow.x = @battler.position_x
    @shadow.y = @battler.position_y + @shadow_plus_y - (@jump_plus * 2)
    @shadow.z = @battler.position_z - 4
  end
 
  alias shadow_battler_anime battler_anime
  def battler_anime
    shadow_battler_anime
   
    return if @shadow == nil
    @shadow.bitmap = self.bitmap
    @shadow.src_rect = self.src_rect
  end
end
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# END OF SCRIPT
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