Custom Parameter Test

class RPG::Skill < RPG::UsableItem

  attr_accessor :bp_cost
  attr_accessor :burst_skill

  alias recall_init initialize
  def initialize
    @bp_cost = 0
    @burst_skill = false
  end

  def check_notetag
    if @note == "<final burst>"
      @burst_skill = true
      @bp_cost = 600
    end
  end

end

class Game_BattlerBase
  attr_reader :bp

  def initialize
    @hp = @mp = @tp = 0
    @bp = 0
    @hidden = false
    clear_param_plus
    clear_states
    clear_buffs
  end

  def bp=(bp)
    @bp = bp
    refresh
  end

  def bp_max
    @bp_max = mhp / 2
  end

  def skill_bp_cost(skill)
    skill.bp_cost
  end

  def skill_cost_payable?(skill)
    #unless skill.burst_skill
    #  tp >= skill_tp_cost(skill) &&
    #  mp >= skill_mp_cost(skill)
    #else
    #end

    tp >= skill_tp_cost(skill) &&
    mp >= skill_mp_cost(skill) &&
    bp >= skill_bp_cost(skill)

  end

  def pay_skill_cost(skill)
    self.mp -= skill_mp_cost(skill)
    self.tp -= skill_tp_cost(skill)
    self.bp -= skill_bp_cost(skill)
  end
end

class Window_SkillList < Window_Selectable
    def draw_skill_cost(rect, skill)
    if @actor.skill_tp_cost(skill) > 0
      change_color(tp_cost_color, enable?(skill))
      draw_text(rect, @actor.skill_tp_cost(skill), 2)
    elsif @actor.skill_mp_cost(skill) > 0
      change_color(mp_cost_color, enable?(skill))
      draw_text(rect, @actor.skill_mp_cost(skill), 2)
    elsif skill.burst_skill && @actor.skill_bp_cost(skill) > 0
        change_color(gold_color, enable?(skill))
        draw_text(rect, @actor.skill_bp_cost(skill), 2)
    end
  end
end