Sprites... I suck at them....(rubygame)

ruby-talk
1

okay here is my little sprite file with rubygame

require "rubygame"
$stdout.sync = true
Rubygame.init()

class Chr
  include Rubygame::Sprites::Sprite
  @@chrforward = Rubygame::Image.load("forward.png")
  @@chrleft = Rubygame::Image.load("left.png")
  @@chrright = Rubygame::Image.load("right.png")
  @@chrbackword = Rubygame::Image.load("backwords.png")
  @@chrforward.set_colorkey(@@chrforward.get_at([0,0]))
  @@chrleft.set_colorkey(@@chrleft.get_at([0,0]))
  @@chrright.set_colorkey(@@chrright.get_at([0,0]))
  @@chrbackword.set_colorkey(@@chrbackword.get_at([0,0]))

  def load_image_for(dir)
    if dir == "back" || dir == "backword"
      return @@chrbackword
    elsif dir == "left"
      return @@chrleft
    elsif dir == "right"
      return @@chrright
    elsif dir == "forward" || dir == "up"
      return @@chrforward
    end
  end

  def initalize(x,y,starter="forward")
    @image = load_image_for starter
    @rect = Rubygame::Rect.new(x,y,*@@chrforward.size)
  end

  def update_image(dir)
    load_image_for dir
  end

  def update(dir)
    self.update_image(dir)
    @rect = @image.size
  end

end

class MyNPC
  include Rubygame::Sprites::Sprite
  @@npcforward = Rubygame::Image.load("npcforward.png")
  @@npcleft = Rubygame::Image.load("npcleft.png")
  @@npcright = Rubygame::Image.load("npcright.png")
  @@npcbackword = Rubygame::Image.load("npcbackwords.png")
  @@npcforward.set_colorkey(@@npcforward.get_at([0,0]))
  @@npcleft.set_colorkey(@@npcleft.get_at([0,0]))
  @@npcright.set_colorkey(@@npcright.get_at([0,0]))
  @@npcbackword.set_colorkey(@@npcbackword.get_at([0,0]))

  def load_image_for(dir)
    if dir == "back" || dir == "backword"
      return @@npcbackword
    elsif dir == "left"
      return @@npcleft
    elsif dir == "right"
      return @@npcright
    elsif dir == "forward" || dir == "up"
      return @@npcforward
    end
  end

  def initalize(x,y,starter="forward")
    @image = load_image_for starter
    @rect = Rubygame::Rect.new(x,y,*@@npcforward.size)
  end

  def update_image(dir)
    load_image_for dir
  end

  def update(dir)
    self.update_image(dir)
    @rect = @image.size
  end

end

class ChrGroup < Rubygame::Sprites::Group
  include Rubygame::Sprites::UpdateGroup
end

screen = Rubygame::Screen.set_mode([320,240])
screen.set_caption("Sprite test","SPRITE TEST")
background = Rubygame::Surface.new(screen.size)

mainchr = Chr.new
npc = MyNPC.new
mainchr.initalize(0,0)
npc.initalize(50,50)

chrs = ChrGroup.new
chrs.push(mainchr,npc)
chrs.draw(screen)

catch(:rubygame_quit) do
  loop do
    chrs.undraw(screen,background)
    chrs.update("left")
    puts "left"
    sleep 2
    chrs.update("up")
    puts "up"
    sleep 2
    chrs.update("right")
    puts "right"
    sleep 2
    chrs.update("down")
    puts "down"
    sleep 2
    chrs.draw(screen)
    screen.update()
  end
end

Very messey I know! Well two problems with it...
   one:
       chrs.update doesn't seem to be drawing them
   two:
       one the secound loop it crashes because then it dosn't like
chrs.undraw

is there a better placce for me to post these also does anyone know a
good tut. on rubygame?

···

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