http://www.gamebaker.com/rmxp/scripts/hide-zero-sp-cost.htm
  스킬의 사용SP가 0일때 SP를 표시하지 않는 스크립트입니다.  패시브스킬사용시 유용?


#=============================================================================
# ** SG Hide Zero SP Cost (skills menu only)
#=============================================================================
# sandgolem
# Version 1a
# 19.03.06
#=============================================================================
#
# To disable this for whatever reason during gameplay, use:
#    $sg_show_zero_sp_cost = true
#
# To re-enable this script, use:
#    $sg_show_zero_sp_cost = nil
#
#=============================================================================
#
# To check for updates or find more scripts, visit:
# http://www.gamebaker.com/rmxp/scripts/
#
# This is a -very- simple edit. See the section marked as edited below if this
# is incompatible with any other scripts you're using.
#
# To use this script, copy it and insert it in a new section above "Main",
# but under the default scripts and the SDK if you're using it.
#
# If you're using a script that alters the Skills menu, try putting this
# above it as it rewrites one of the default methods.
#
# Have problems? You can leave me a message at:
# http://www.gamebaker.com/users/sandgolem
#
#=============================================================================

#--------------------------------------------------------------------------
# * SDK Log Script
#--------------------------------------------------------------------------

begin
  SDK.log("SG Hide Zero SP Cost", "Sandgolem", "1a", "26.02.06")
  if SDK.state("SG Hide Zero SP Cost") != true
    @sg_hide_zero_sp_disabled = true
  end
  rescue
end

#--------------------------------------------------------------------------
# * Begin SDK Enable Test
#--------------------------------------------------------------------------
if !@sg_hide_zero_sp_disabled

class Window_Skill < Window_Selectable

  def sg_draw_skill_color(skill,type)
    if @actor.skill_can_use?(skill.id)
      self.contents.font.color = normal_color
    else
      self.contents.font.color = disabled_color
    end
  end
 
  def draw_item(index)
    skill = @data[index]
# Broken apart for compatability with other scripts
    sg_draw_skill_color(skill,type)
    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)
#------------------------------------------------------------------------------
# Begin SG Hide Zero SP Cost Edit
#------------------------------------------------------------------------------
    sg_draw_skill_color(skill,1)
    if !$sg_show_zero_sp_cost
      if skill.sp_cost > 0
        self.contents.draw_text(x + 232, y, 48, 32, skill.sp_cost.to_s, 2)
      end
    else
      self.contents.draw_text(x + 232, y, 48, 32, skill.sp_cost.to_s, 2)
    end
#------------------------------------------------------------------------------
# End SG Hide Zero SP Cost Edit
#------------------------------------------------------------------------------
  end
end

#--------------------------------------------------------------------------
# * End SDK Enable Test
#--------------------------------------------------------------------------
end