Relic Castle

I've been trying to install the lava surfing script from mej71 here. I believe it was written for Essentials v15, and I'm trying to adapt it for Essentials v17 to use in my game for this year's Jam.

It's been challenging because I'm new to scripting, there were several edits that needed to be made, and they weren't in all the same places outlined in mej71's tutorial. I do think I got it mostly working, but the base_surf sprite is not appearing.


It's difficult for me to know where the mistake is, since there's no error message, and the edited code is all over the place. But since the move seems to be working, and the problem appeares to be with the base_surf sprite, I thought perhaps it has something to do with the "Sprite_SurfBase" script section? See what I have below:

Ruby: 
class Sprite_SurfBase
  attr_reader :visible
  attr_accessor :event

  def initialize(sprite,event,viewport=nil)
    @rsprite  = sprite
    @sprite   = nil
    @event    = event
    @viewport = viewport
    @disposed = false
    @surfbitmap = AnimatedBitmap.new("Graphics/Characters/base_surf")
    @lavasurfbitmap = AnimatedBitmap.new("Graphics/Characters/base_surf")
    @divebitmap = AnimatedBitmap.new("Graphics/Characters/base_dive")
    @cws = @surfbitmap.width/4
    @chs = @surfbitmap.height/4
    @cwl = @lavasurfbitmap.width/4
    @chl = @lavasurfbitmap.height/4
    @cwd = @divebitmap.width/4
    @chd = @divebitmap.height/4
    update
  end

  def dispose
    if !@disposed
      @sprite.dispose if @sprite
      @sprite   = nil
      @surfbitmap.dispose
        elsif @lavasurfbitmap.dispose
      @disposed = true
    end
  end

  def disposed?
    @disposed
  end

  def visible=(value)
    @visible = value
    @sprite.visible = value if @sprite && !@sprite.disposed?
  end

  def update
    return if disposed?
    if !$PokemonGlobal.surfing && !$PokemonGlobal.diving
      # Just-in-time disposal of sprite
      if @sprite
        @sprite.dispose
        @sprite = nil
      end
      return
    end

    # Just-in-time creation of sprite
    @sprite = Sprite.new(@viewport) if !@sprite
    if @sprite
      if $PokemonGlobal.surfing
        @sprite.bitmap = @surfbitmap.bitmap; cw = @cws; ch = @chs
      elsif $PokemonGlobal.lavasurfing
        @sprite.bitmap = @lavasurfbitmap.bitmap; cw = @cwl; ch = @chl
      elsif $PokemonGlobal.diving
        @sprite.bitmap = @divebitmap.bitmap; cw = @cwd; ch = @chd
      end
      sx = @event.pattern_surf*cw
      sy = ((@event.direction-2)/2)*ch
      @sprite.src_rect.set(sx,sy,cw,ch)
      if $PokemonTemp.surfJump
        @sprite.x = ($PokemonTemp.surfJump[0]*Game_Map.realResX-@event.map.display_x+3)/4+(Game_Map::TILEWIDTH/2)
        @sprite.y = ($PokemonTemp.surfJump[1]*Game_Map.realResY-@event.map.display_y+3)/4+(Game_Map::TILEHEIGHT/2)+16
      else
        @sprite.x = @rsprite.x
        @sprite.y = @rsprite.y
      end
      @sprite.ox      = cw/2
      @sprite.oy      = ch-16   # Assume base needs offsetting
      @sprite.oy      -= @event.bob_height
      @sprite.z       = @event.screen_z(ch)-1
      @sprite.zoom_x  = @rsprite.zoom_x
      @sprite.zoom_y  = @rsprite.zoom_y
      @sprite.tone    = @rsprite.tone
      @sprite.color   = @rsprite.color
      @sprite.opacity = @rsprite.opacity
    end
  end
end

I've been working on this all day, and I'm quite frustrated. This is my first time editing a script and it seems I chose one of the more complex things to work on. I'm going to sleep now, I hope someone can point out an error or something. Maybe there's a script keyword I can search for using Ctrl + Shift + F that could point me in the right direction?
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