Enemy Action Selection Fix

[RPG Advocate]

Enemy Action Selection Fix
by RPG Advocate
saved from Phylomortis.Com

Introduction
This script fixes two annoyances with the way the standard enemy action selection method determines which action an enemy will take. First, this script makes it so that actions with any rating will be chosen (action's rating / total rating of all actions x 100)% of the time, rather than completely excluding actions more than three rating units below the highest-rated action. Second, this script adds a method that excludes pointless actions, preventing monsters from doing nothing because they have, for instance, selected a skill they don't have enough SP to use, or have selected a skill that targets dead characters, but no monsters in the group are dead.


Demo
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Script

Enemy Action Selection Fix

Code:

# Enemy Action Selection Fix
# by RPG Advocate


#==============================================================================
# ** Game_Enemy
#------------------------------------------------------------------------------
#  This class handles enemies. It's used within the Game_Troop class
#  ($game_troop).
#==============================================================================

class Game_Enemy < Game_Battler
  #--------------------------------------------------------------------------
  # * Make Action
  #--------------------------------------------------------------------------
  def make_action
    # Clear current action
    self.current_action.clear
    # If unable to move
    unless self.movable?
      # End Method
      return
    end
    # Extract current effective actions
    available_actions = []
    rating_max = 0
    for action in self.actions
      # Confirm turn conditions
      n = $game_temp.battle_turn
      a = action.condition_turn_a
      b = action.condition_turn_b
      if (b == 0 and n != a) or
         (b > 0 and (n < 1 or n < a or n % b != a % b))
        next
      end
      # Confirm HP conditions
      if self.hp * 100.0 / self.maxhp > action.condition_hp
        next
      end
      # Confirm level conditions
      if $game_party.max_level < action.condition_level
        next
      end
      # Confirm switch conditions
      switch_id = action.condition_switch_id
      if switch_id > 0 and $game_switches[switch_id] == false
        next
      end
      # Confirm useful condition
      if exclude_pointless_actions(action)
        next
      end
      # Add this action to applicable conditions
      available_actions.push(action)
      if action.rating > rating_max
        rating_max = action.rating
      end
    end
    # Calculate total
    ratings_total = 0
    for action in available_actions
      ratings_total += action.rating
    end
    if ratings_total > 0
      choose_action = []
      # Set things that correspond to created random numbers as current action
      for action in available_actions
        for j in 1..action.rating
          choose_action.push(action)
        end
      end
      enemy_action = choose_action[rand(choose_action.size - 1)]
      self.current_action.kind = enemy_action.kind
      self.current_action.basic = enemy_action.basic
      self.current_action.skill_id = enemy_action.skill_id
      self.current_action.decide_random_target_for_enemy
    end
  end
  #--------------------------------------------------------------------------
  # * Exclude pointless Actions
  #     action : enemy action
  #--------------------------------------------------------------------------
  def exclude_pointless_actions(action)
    if action.kind == 0
      return false
    end
    if action.kind == 1
      s = action.skill_id
      if self.sp < $data_skills[s].sp_cost
        return true
      end
      if $data_skills[s].common_event_id > 0
        return false
      end
      if $data_skills[s].scope == 0 || $data_skills[s].scope == 1 ||
        $data_skills[s].scope == 2
        return false
      end
      if $data_skills[s].scope == 3 || $data_skills[s].scope == 4
        if $game_troop != nil
        fullhpflag = true
        statusflag = true
          for i in $game_troop.enemies
            if i.hp < i.maxhp && i.exist?
              fullhpflag = false
            end
            for j in $data_skills[s].plus_state_set
              if not i.state?(j) && i.exist?
                statusflag = false
              end
            end
            for j in $data_skills[s].minus_state_set
              if i.state?(j) && i.exist?
                statusflag = false
              end
            end
          end
        end
      if $data_skills[s].power == 0 && statusflag
        return true
      end
      if $data_skills[s].power < 0 && statusflag && fullhpflag
        return true
        end
      end
      if $data_skills[s].scope == 5 || $data_skills[s].scope == 6
        nonedeadflag = true
        if $game_troop != nil
          for i in $game_troop.enemies
            if i.dead? and not i.hidden
              nonedeadflag = false
            end
          end
        end
        if nonedeadflag
          return true
        end
      end
      if $data_skills[s].scope == 7
        if $game_troop != nil
          fullhpflag = true
          statusflag = true
          if self.hp < self.maxhp
            fullhpflag = false
          end
          for j in $data_skills[s].plus_state_set
            if not self.state?(j)
              statusflag = false
              end
            end
            for j in $data_skills[s].minus_state_set
              if self.state?(j)
                statusflag = false
              end
            end
          end
      if $data_skills[s].power == 0 && statusflag
        return true
      end
      if $data_skills[s].power < 0 && statusflag && fullhpflag
        return true
        end
      end
    end
    return false
  end
end