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I want a script that changes the damage system

Intro


Obviously I'm making a RPG Maker game, so that is why I need a script. The script I want is a script that alters the way the attack power and defense system determines how much damage you are going to do and how much the enemy would do to you. I could not find this script anywhere so that is why I'm asking here. The specific way I want this script to work is below this paragraph. I hope you can help me out.

In General


This is the way the script I want works. What determines how much damage you do is your strength + your weapon's attack + other bonuses from accessories, armor, and shields - the enemies defense. The way the opponent's damage system would just be it's attack power - your defense. In a attack involving magic the system would be Intelligence + Power + Other Bonuses - the enemies magic defense. The way the enemies would work is Intelligence + Power - Your magic defense. This system can be observed in the Fire Emblem series, which is a TBS made by Nintendo. For an example, say your strength is 260, and your weapon's attack power is 155. The enemies attack defense is 300, got it? You don't have any attack bonuses from other things such as armor and accessories. 260 + 155 is 315, and 315 - 300 is 15, so you would do 15 damage to the enemy. This would work the same way for the enemies attack and for magic you replace strength with intelligence and strength bonuses with intelligence bonuses. I hope you can help me, thank you for reading this.
 
First of all, good request! Detailed and to the point. Second, a mod will probably tell you to wait 3 days before bumping. And Third, I know this can be done, I just don't know how to... IF I can figure it out, I will definately help you.

EDIT: Oh, and what battle system are you using?
 
Can you post a link to the thread it's in?

Because I have the damage formulas working for the DBS, but i want to make sure it works with that battle system.

EDIT: Nevermind about the link, I found it. It uses the SDK, and I don't know much about that so I couldn't figure it out, sorry... Maybe ask Trickster? Hopefully someone with more scripting experience than me can help you... again, sorry :(
 
Well, I'm not exactly sure if I'm using that system. I actually would rather have this script than a different battle system. I really don't need a super fancy battle system for my game anyway, I could just stick to the default one.
 
In that case.... Replace your current Game_Battler 3 with this new one. If you need more editing, just ask and I'll try my best :)

Code:
#==============================================================================
# ** Game_Battler (part 3)
#------------------------------------------------------------------------------
#  This class deals with battlers. It's used as a superclass for the Game_Actor
#  and Game_Enemy classes. ###Baniff was here :)####
#==============================================================================

class Game_Battler
  #--------------------------------------------------------------------------
  # * Determine Usable Skills
  #     skill_id : skill ID
  #--------------------------------------------------------------------------
  def skill_can_use?(skill_id)
    # If there's not enough SP, the skill cannot be used.
    if $data_skills[skill_id].sp_cost > self.sp
      return false
    end
    # Unusable if incapacitated
    if dead?
      return false
    end
    # If silent, only physical skills can be used
    if $data_skills[skill_id].atk_f == 0 and self.restriction == 1
      return false
    end
    # Get usable time
    occasion = $data_skills[skill_id].occasion
    # If in battle
    if $game_temp.in_battle
      # Usable with [Normal] and [Only Battle]
      return (occasion == 0 or occasion == 1)
    # If not in battle
    else
      # Usable with [Normal] and [Only Menu]
      return (occasion == 0 or occasion == 2)
    end
  end
  #--------------------------------------------------------------------------
  # * Applying Normal Attack Effects
  #     attacker : battler
  #--------------------------------------------------------------------------
  def attack_effect(attacker)
    # Clear critical flag
    self.critical = false
    # First hit detection
    hit_result = (rand(100) < attacker.hit)
    # If hit occurs
    if hit_result == true
      # Calculate basic damage
      self.damage = [attacker.atk + attacker.str - self.pdef].max#Edit p.atk fomula here
      # Element correction
      self.damage *= elements_correct(attacker.element_set)
      self.damage /= 100
      # If damage value is strictly positive
      if self.damage > 0
        # Critical correction
        if rand(100) < 4 * attacker.dex / self.agi
          self.damage *= 2
          self.critical = true
        end
        # Guard correction
        if self.guarding?
          self.damage /= 2
        end
      end
      # Dispersion
      if self.damage.abs > 0
        amp = [self.damage.abs * 15 / 100, 1].max
        self.damage += rand(amp+1) + rand(amp+1) - amp
      end
      # Second hit detection
      eva = 8 * self.agi / attacker.dex + self.eva
      hit = self.damage < 0 ? 100 : 100 - eva
      hit = self.cant_evade? ? 100 : hit
      hit_result = (rand(100) < hit)
    end
    # If hit occurs
    if hit_result == true
      # State Removed by Shock
      remove_states_shock
      # Substract damage from HP
      self.hp -= self.damage
      # State change
      @state_changed = false
      states_plus(attacker.plus_state_set)
      states_minus(attacker.minus_state_set)
    # When missing
    else
      # Set damage to "Miss"
      self.damage = "Miss"
      # Clear critical flag
      self.critical = false
    end
    # End Method
    return true
  end
  #--------------------------------------------------------------------------
  # * Apply Skill Effects
  #     user  : the one using skills (battler)
  #     skill : skill
  #--------------------------------------------------------------------------
  def skill_effect(user, skill)
    # Clear critical flag
    self.critical = false
    # If skill scope is for ally with 1 or more HP, and your own HP = 0,
    # or skill scope is for ally with 0, and your own HP = 1 or more
    if ((skill.scope == 3 or skill.scope == 4) and self.hp == 0) or
       ((skill.scope == 5 or skill.scope == 6) and self.hp >= 1)
      # End Method
      return false
    end
    # Clear effective flag
    effective = false
    # Set effective flag if common ID is effective
    effective |= skill.common_event_id > 0
    # First hit detection
    hit = skill.hit
    if skill.atk_f > 0
      hit *= user.hit / 100
    end
    hit_result = (rand(100) < hit)
    # Set effective flag if skill is uncertain
    effective |= hit < 100
    # If hit occurs
    if hit_result == true
      # Calculate power
      power = skill.power + user.int #Edit m.atk formula here
      if power > 0
        #power -= self.pdef * skill.pdef_f / 200
        power -= self.mdef #* skill.mdef_f / 200
        power = [power, 0].max
      end
      # Calculate rate
      #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)
      # Calculate basic damage
      self.damage = power #* rate / 20
      # Element correction
      self.damage *= elements_correct(skill.element_set)
      self.damage /= 100
      # If damage value is strictly positive
      if self.damage > 0
        # Guard correction
        if self.guarding?
          self.damage /= 2
        end
      end
      # Dispersion
      if skill.variance > 0 and self.damage.abs > 0
        amp = [self.damage.abs * skill.variance / 100, 1].max
        self.damage += rand(amp+1) + rand(amp+1) - amp
      end
      # Second hit detection
      eva = 8 * self.agi / user.dex + self.eva
      hit = self.damage < 0 ? 100 : 100 - eva * skill.eva_f / 100
      hit = self.cant_evade? ? 100 : hit
      hit_result = (rand(100) < hit)
      # Set effective flag if skill is uncertain
      effective |= hit < 100
    end
    # If hit occurs
    if hit_result == true
      # If physical attack has power other than 0
      if skill.power != 0 and skill.atk_f > 0
        # State Removed by Shock
        remove_states_shock
        # Set to effective flag
        effective = true
      end
      # Substract damage from HP
      last_hp = self.hp
      self.hp -= self.damage
      effective |= self.hp != last_hp
      # State change
      @state_changed = false
      effective |= states_plus(skill.plus_state_set)
      effective |= states_minus(skill.minus_state_set)
      # If power is 0
      if skill.power == 0
        # Set damage to an empty string
        self.damage = ""
        # If state is unchanged
        unless @state_changed
          # Set damage to "Miss"
          self.damage = "Miss"
        end
      end
    # If miss occurs
    else
      # Set damage to "Miss"
      self.damage = "Miss"
    end
    # If not in battle
    unless $game_temp.in_battle
      # Set damage to nil
      self.damage = nil
    end
    # End Method
    return effective
  end
  #--------------------------------------------------------------------------
  # * Application of Item Effects
  #     item : item
  #--------------------------------------------------------------------------
  def item_effect(item)
    # Clear critical flag
    self.critical = false
    # If item scope is for ally with 1 or more HP, and your own HP = 0,
    # or item scope is for ally with 0 HP, and your own HP = 1 or more
    if ((item.scope == 3 or item.scope == 4) and self.hp == 0) or
       ((item.scope == 5 or item.scope == 6) and self.hp >= 1)
      # End Method
      return false
    end
    # Clear effective flag
    effective = false
    # Set effective flag if common ID is effective
    effective |= item.common_event_id > 0
    # Determine hit
    hit_result = (rand(100) < item.hit)
    # Set effective flag is skill is uncertain
    effective |= item.hit < 100
    # If hit occurs
    if hit_result == true
      # Calculate amount of recovery
      recover_hp = maxhp * item.recover_hp_rate / 100 + item.recover_hp
      recover_sp = maxsp * item.recover_sp_rate / 100 + item.recover_sp
      if recover_hp < 0
        recover_hp += self.pdef * item.pdef_f / 20
        recover_hp += self.mdef * item.mdef_f / 20
        recover_hp = [recover_hp, 0].min
      end
      # Element correction
      recover_hp *= elements_correct(item.element_set)
      recover_hp /= 100
      recover_sp *= elements_correct(item.element_set)
      recover_sp /= 100
      # Dispersion
      if item.variance > 0 and recover_hp.abs > 0
        amp = [recover_hp.abs * item.variance / 100, 1].max
        recover_hp += rand(amp+1) + rand(amp+1) - amp
      end
      if item.variance > 0 and recover_sp.abs > 0
        amp = [recover_sp.abs * item.variance / 100, 1].max
        recover_sp += rand(amp+1) + rand(amp+1) - amp
      end
      # If recovery code is negative
      if recover_hp < 0
        # Guard correction
        if self.guarding?
          recover_hp /= 2
        end
      end
      # Set damage value and reverse HP recovery amount
      self.damage = -recover_hp
      # HP and SP recovery
      last_hp = self.hp
      last_sp = self.sp
      self.hp += recover_hp
      self.sp += recover_sp
      effective |= self.hp != last_hp
      effective |= self.sp != last_sp
      # State change
      @state_changed = false
      effective |= states_plus(item.plus_state_set)
      effective |= states_minus(item.minus_state_set)
      # If parameter value increase is effective
      if item.parameter_type > 0 and item.parameter_points != 0
        # Branch by parameter
        case item.parameter_type
        when 1  # Max HP
          @maxhp_plus += item.parameter_points
        when 2  # Max SP
          @maxsp_plus += item.parameter_points
        when 3  # Strength
          @str_plus += item.parameter_points
        when 4  # Dexterity
          @dex_plus += item.parameter_points
        when 5  # Agility
          @agi_plus += item.parameter_points
        when 6  # Intelligence
          @int_plus += item.parameter_points
        end
        # Set to effective flag
        effective = true
      end
      # If HP recovery rate and recovery amount are 0
      if item.recover_hp_rate == 0 and item.recover_hp == 0
        # Set damage to empty string
        self.damage = ""
        # If SP recovery rate / recovery amount are 0, and parameter increase
        # value is ineffective.
        if item.recover_sp_rate == 0 and item.recover_sp == 0 and
           (item.parameter_type == 0 or item.parameter_points == 0)
          # If state is unchanged
          unless @state_changed
            # Set damage to "Miss"
            self.damage = "Miss"
          end
        end
      end
    # If miss occurs
    else
      # Set damage to "Miss"
      self.damage = "Miss"
    end
    # If not in battle
    unless $game_temp.in_battle
      # Set damage to nil
      self.damage = nil
    end
    # End Method
    return effective
  end
  #--------------------------------------------------------------------------
  # * Application of Slip Damage Effects
  #--------------------------------------------------------------------------
  def slip_damage_effect
    # Set damage
    self.damage = self.maxhp / 10
    # Dispersion
    if self.damage.abs > 0
      amp = [self.damage.abs * 15 / 100, 1].max
      self.damage += rand(amp+1) + rand(amp+1) - amp
    end
    # Subtract damage from HP
    self.hp -= self.damage
    # End Method
    return true
  end
  #--------------------------------------------------------------------------
  # * Calculating Element Correction
  #     element_set : element
  #--------------------------------------------------------------------------
  def elements_correct(element_set)
    # If not an element
    if element_set == []
      # Return 100
      return 100
    end
    # Return the weakest object among the elements given
    # * "element_rate" method is defined by Game_Actor and Game_Enemy classes,
    #    which inherit from this class.
    weakest = -100
    for i in element_set
      weakest = [weakest, self.element_rate(i)].max
    end
    return weakest
  end
end
 
I'm having a problem with the damaging system. My hero has strength of 6 and a weapon attack of 2, the enemy has five physical defense. The hero isn't doing three like they should be, they are doing just 0. The character doesn't have any other bonuses by the way. The magic calculations are right on the spot though.

EDIT: No, there is no error actually, I just made a very stupid mistake with the whole deal.
 

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