关于Hime大神的Equip Param Formulas，装备自定义公式。

Muguafeifei

最近刚刚开始学脚本，用了Hime大神的Equip Param Formulas，想要做一个防具，增加防御力=人物等级*2

脚本（By: Hime）
=begin
#===============================================================================
Title: Equip Param Formulas
Author: Hime
Date: Mar 15, 2014
URL: http://www.himeworks.com/2014/03/15/equip-param-formulas/
--------------------------------------------------------------------------------
** Change log
Mar 15, 2014
   - Initial release
--------------------------------------------------------------------------------   
** Terms of Use
* Free to use in non-commercial projects
* Contact me for commercial use
* No real support. The script is provided as-is
* Will do bug fixes, but no compatibility patches
* Features may be requested but no guarantees, especially if it is non-trivial
* Credits to Hime Works in your project
* Preserve this header
--------------------------------------------------------------------------------
** Description

This script allows you to use formulas to define parameters for weapons and
armors.

For example, if you were using a script that provided equip levels, you can
define a formula that uses the level to determine the weapon's parameters.

All attributes that the equip holds can be referenced.
Formula variables are also available to use.

--------------------------------------------------------------------------------
** Installation

Place this script below Materials and above Main

--------------------------------------------------------------------------------
** Usage

To specify a parameter formula, note-tag a weapon or armor with

   <param formula: TYPE>
     FORMULA
   </param formula>
   
Where the TYPE is one of

   mhp - Max HP
   mmp - Max MP
   atk - Attack Power
   def - Defense Power
   mat - Magic Attack Power
   mdf - Magic Defense Power
   agi - Agility
   luk - Luck

The formula can be any valid formula that returns a number
The following formula variables are available

   p - game party
   t - game troop
   s - game switches
   v - game variables

#===============================================================================
=end
$imported = {} if $imported.nil?
$imported[:TH_EquipParamFormulas] = true
#===============================================================================
# ** Configuration
#===============================================================================
module TH
  module Equip_Param_Formulas
    Ext_Regex = /<param[-_ ]formula:\s*(\w+)\s*>(.*?)<\/param[-_ ]formula>/im

    Param_Table = {
      :mhp => 0,
      :mmp => 1,
      :atk => 2,
      :def => 3,
      :mat => 4,
      :mdf => 5,
      :agi => 6,
      :luk => 7
    }
  end
end
#===============================================================================
# ** Rest of Script
#===============================================================================
module RPG
  class EquipItem

    #---------------------------------------------------------------------------
    # Not the most efficient way to do it but it preserves the interface
    #---------------------------------------------------------------------------
    def params
      load_notetag_param_formulas unless @param_formulas_checked
      return @param_formulas.collect {|f| eval_param_formula(f)}
    end

    def eval_param_formula(formula, p=$game_party, s=$game_switches, t=$game_troop, v=$game_variables)
      eval(formula)
    end

    def load_notetag_param_formulas
      @param_formulas_checked = true
      @param_formulas = @params.map {|val| val.to_s }
      results = self.note.scan(TH::Equip_Param_Formulas::Ext_Regex)
      results.each do |res|
        type = res[0].strip.downcase.to_sym
        id = TH::Equip_Param_Formulas::Param_Table[type]
        formula = res[1]
        @param_formulas[id] = formula
      end
    end
  end
end



但在公式中写上
<param formula: TYPE>
     self.level * 2
   </param formula>
后，一接触到这件装备，就
undefined method 'level'  for # <RPG::Armor:0x10627964>


试着在后面加入：
def a
SceneManager.scene.is_a?(Scene_Battle) ? BattleManager.actor : $game_party.menu_actor
end

后，将公式改为 a.level * 2，这样在菜单里没有问题，也正是想要的东西，但一进入战斗就又
undefined method 'level' for nil:Nilclass 了。

害怕是因为和以前的脚本冲突，所以试着新开了一个Project，但还是老问题。

新人实在是没办法了，希望有大神能指点一下。如果不行的话，有没有类似效果的脚本？

alexncf125

应该用Hime的Parameter Bonuses

[pre lang="ruby"]=begin
#===============================================================================
Title: Parameter Bonuses
Author: Hime
Date: Aug 1, 2014
URL: http://himeworks.com/2013/12/09/parameter-bonuses/
--------------------------------------------------------------------------------
** Change log
Aug 1, 2014
   - added a reference to the tagged object
Jul 24, 2014
   - added support for class, armors, weapons, and states
Dec 20, 2013
   - added support for "recursive" references
   - added support for passing in the base parameter
   - added support for enemy parameter bonuses
Dec 9, 2013
   - initial release
--------------------------------------------------------------------------------   
** Terms of Use
* Free to use in non-commercial projects
* Contact me for commercial use
* No real support. The script is provided as-is
* Will do bug fixes, but no compatibility patches
* Features may be requested but no guarantees, especially if it is non-trivial
* Credits to Hime Works in your project
* Preserve this header
--------------------------------------------------------------------------------
** Description

This script allows you to define "Parameter bonuses" for your actors and
enemies. A paramter bonus is simply a bonus that will be added to your
parameters based on a formula. The bonus itself could be an increase, or
even a decrease in stats if you provide a negative value.

For example, suppose you had custom parameters that allowed you to define
stats like "strength" or "intelligence", where str increases your atk and
max HP params while int increases magic attack and magic defense stats. You
can use parameter bonuses to define formulas that will allow your str and int
stats to contribute to the other parameters.

Since the parameter bonus can be any formula, you can define bonuses based
on anything.

Parameter bonuses can be defined in actors, classes, weapons, armors, states,
and enemies. Actors will inherit any bonuses defined in their class, equips,
and states. Enemies will inherit any bonuses defined in their states.

Because equips and states can be changed, you can use this to create unique
effects.

--------------------------------------------------------------------------------
** Installation

In the script editor, place this script below Materials and above Main

--------------------------------------------------------------------------------
** Usage

To define a parameter bonus, note-tag actors with

   <param bonus: TYPE>
     FORMULA
   </param bonus>
   
Where the TYPE is one of

   mhp - max HP
   mmp - max MP
   atk - attack
   def - defense
   mat - magic attack
   mdf - magic defense
   agi - agility
   luk - luck
   
And the formula can be any valid ruby formula.
The following formula variables are available

   a - the current battler (actor or enemy)
obj - the tagged object
   p - game party
   t - game troop
   v - game variables
   s - game switches
   
You can have a bonus reference itself. For example

   <param bonus: atk>
     a.atk * 1.5
   </param bonus>
   
Will increase the battler's atk value by 50%. This atk value does not
include the bonus, but includes base params and extra params.
   
You can define multiple parameter bonuses for an actor, and you can define
multiple bonuses for the same stat; simply add more of the note-tag.

== Object Reference ==

The `obj` variable is a special variable that you can use to refer
to the object that the bonus is attached to. For example, suppose
you notetagged a weapon with

<param bonus: mhp>
    obj.params[2] * 10
</param bonus>

This means that you receive an HP bonus equal to the weapon's atk times 10.
All of the attributes that you can access in a weapon is available.

If the bonus is attached to an armor, then `obj` references that armor, and
so on.

--------------------------------------------------------------------------------
** Example

Suppose we have a custom stat called "str", and for each point of str, it
increases HP by 10 and atk by 2. You would use two parameter bonuses:

   <param bonus: mhp>
     a.str * 10
   </param bonus>
   
   <param bonus: atk>
     a.str * 2
   </param bonus>

#===============================================================================
=end
$imported = {} if $imported.nil?
$imported["TH_ParameterBonus"] = true
#===============================================================================
# ** Configuration
#===============================================================================
module TH
  module Parameter_Bonuses
    Regex = /<param[-_ ]bonus:\s*(\w+)\s*>(.*?)<\/param[-_ ]bonus>/im

#===============================================================================
# ** Rest of Script
#===============================================================================
    Table = {
      :mhp => 0,
      :mmp => 1,
      :atk => 2,
      :def => 3,
      :mat => 4,
      :mdf => 5,
      :agi => 6,
      :luk => 7
    }
  end
end

module RPG
  class BaseItem
    def param_bonuses
      load_notetag_param_bonuses unless @param_bonuses
      return @param_bonuses
    end
   
    def load_notetag_param_bonuses
      @param_bonuses = []
      results = self.note.scan(TH::Parameter_Bonuses::Regex)
      results.each do |res|
        param = res[0].downcase.to_sym
        formula = res[1].strip
        id = TH::Parameter_Bonuses::Table[param]
        data = Data_ParamBonus.new(id, formula, self)
        @param_bonuses << data
      end
    end
  end
end

class Data_ParamBonus
  
  attr_accessor :param_id
  attr_accessor :formula
        attr_accessor :obj
  
  def initialize(param_id, formula="0", obj)
    @param_id = param_id
    @formula = formula
                @obj = obj
  end
  
  def value(a, p=$game_party, t=$game_troop, s=$game_switches, v=$game_variables)
    eval(@formula)
  end
end

class Game_BattlerBase
  
  def param_bonus_objects
    states
  end
  
  alias :th_param_bonuses_param_plus :param_plus
  def param_plus(param_id)
    th_param_bonuses_param_plus(param_id) + param_bonus(param_id)
  end
  
  #-----------------------------------------------------------------------------
  # Calculates the bonus parameter.
  #-----------------------------------------------------------------------------
  def param_bonus(param_id)
    return 0 if @check_param_bonus
    @check_param_bonus = true
    val = param_bonus_objects.inject(0) do |r, bonus_obj|
      bonus_obj.param_bonuses.inject(r) do |r2, obj|
        obj.param_id == param_id ? r2 += obj.value(self) : r2
      end
    end
    @check_param_bonus = false
    return val
  end
end

class Game_Actor < Game_Battler
  
  alias :th_parameter_bonuses_param_bonus_objects :param_bonus_objects
  def param_bonus_objects
    feature_objects
  end
end

class Game_Enemy < Game_Battler
  
  alias :th_parameter_bonuses_param_bonus_objects :param_bonus_objects
  def param_bonus_objects
    feature_objects
  end
end[/pre]

在该防具的备注中写上
<param bonus: def>
    a.level * 2
</param bonus>

Muguafeifei

alexncf125 发表于 2021-3-27 13:19
[fold=应该用Hime的Parameter Bonuses]=begin
#======================================================== ...

谢谢您，不过如果用obj.level还是会无法定义level，用a.level就没问题了！
再一次，感谢您的热心解答。