#--------------------------------------------------------------------------
  # * Animação do ataque
  #     suffix : sufixo
  #--------------------------------------------------------------------------
  def animate_attack(suffix)
    return unless FileTest.exist?("Graphics/Characters/#{@character_name}#{suffix}.png")
    @old_character_name = @character_name
    @character_name = "#{character_name}#{suffix}"
    @old_pattern = @pattern
    @pattern = 0
    @old_anime = @step_anime
    @step_anime = true
    @attack_delay = 20
  end
  #--------------------------------------------------------------------------
  # * Atualização do gráfico da animação
  #--------------------------------------------------------------------------
  def update_graphic_animation
    return unless @attack_delay > 0
    @attack_delay -= 1
    if @attack_delay >= 15
      @pattern = 0
    elsif @attack_delay < 15 and @attack_delay >= 10
      @pattern = 1
    elsif @attack_delay < 10 and @attack_delay >= 5
      @pattern = 2
    elsif @attack_delay < 5
      @pattern = 3
    end
    if @attack_delay == 0
      @character_name = @old_character_name
      @pattern = @old_pattern
      @step_anime = @old_anime
      @suffix = ''
    end
  end