Skill Level

#==============================================================
# http://thiagodd.blogspot.com.br/
# [TSDA] Skill Level
#   --> Version 1.0
# by thiago_d_d
#
#--------------------------------------------------------------
# * Features
#--------------------------------------------------------------
# + The hero Skills will have levels, so when the hero levels up
#   the Skill levels up too, with ramdomly power.
#
#--------------------------------------------------------------
# * Install
#--------------------------------------------------------------
# Put this script above Main.
#
#--------------------------------------------------------------
# * Configuration
#--------------------------------------------------------------
# Change TSDA module below.
#==============================================================
module TSDA
  #The maximum level of Skills
  HABILITY_LEVEL_MAX = 99
  #Value used in the damage formula
  BASE_UP = 750
  #Maximum number of levels the Skill gains per hero level up
  #(It will be random, so the Skill will increase 1 to 5 levels)
  LEVEL_UP = 5
end
#--------------------------------------------------------------
class Game_Actor
  alias old_initialize_ac initialize
  def initialize(actor_id)
    @skill_levels = []
    old_initialize_ac(actor_id)
  end
  #------------------------------------------------------------
  alias old_learn_skill learn_skill
  def learn_skill(skill_id)
    if skill_id > 0 and not skill_learn?(skill_id)
      @skill_levels.push(0)
    end
    old_learn_skill(skill_id)
  end
  #------------------------------------------------------------
  alias old_forget_skill forget_skill
  def forget_skill(skill_id)
    if @skills.include?(skill_id)
      id = @skills.index(skill_id)
      @skill_levels.delete_at(id)
    end
    old_forget_skill(skill_id)
  end
  #------------------------------------------------------------
  alias old_exp exp=
  def exp=(exp)
    level = @level
    old_exp(exp)
    level_number = @level - level
    if level_number > 0
      if @skills.size > 0
        while level_number > 0
          level_number -= 1
          for i in 0...@skill_levels.size
            if @skill_levels[i] < TSDA::HABILITY_LEVEL_MAX
              @skill_levels[i] += rand(TSDA::LEVEL_UP) + 1
            end
          end
        end
      end
    end
  end
  #------------------------------------------------------------
  def skill_level(skill_id)
    id = @skills.index(skill_id)
    return @skill_levels[id]
  end
end
#--------------------------------------------------------------
class Game_Battler
  alias old_skill_effect skill_effect
  def skill_effect(user,skill)
    result = old_skill_effect(user,skill)
    unless result.is_a?(Integer)
      return result
    end
    unless self.damage.is_a?(String) && !user.is_a?(Game_Actor)
      power = skill.power
      n = user.skill_level(skill.id)
      rate = 20
      rate += (user.str * skill.str_f / 100)
      rate += (user.dex * skill.dex_f / 100)
      rate += (user.agi * skill.agi_f / 100)
      rate += (user.int * skill.int_f / 100)
      if self.damage < 0
        self.damage -= power * n * rate / TSDA::BASE_UP
      elsif self.damage > 0
        self.damage += power * n * rate / TSDA::BASE_UP
      end
    end
    return result
  end
end
#--------------------------------------------------------------
class Window_Skill
  def draw_item(index)
    skill = @data[index]
    if @actor.skill_can_use?(skill.id)
      self.contents.font.color = normal_color
    else
      self.contents.font.color = disabled_color
    end
    x = 4 + index % 2 * (288 + 32)
    y = index / 2 * 32
    rect = Rect.new(x, y, self.width / @column_max - 32, 32)
    self.contents.fill_rect(rect, Color.new(0, 0, 0, 0))
    bitmap = RPG::Cache.icon(skill.icon_name)
    opacity = self.contents.font.color == normal_color ?
    255 : 128
    self.contents.blt(x, y + 4, bitmap, Rect.new(0, 0, 24, 24),
    opacity)
    self.contents.draw_text(x + 28, y, 204, 32, skill.name, 0)
    self.contents.draw_text(x + 232, y, 48, 32,
    "Lv:" + @actor.skill_level(skill.id).to_s,2)
    self.contents.draw_text(x + 180, y, 48, 32,
    skill.sp_cost.to_s, 2)
  end
end