#==============================================================================

# ** Dynamic Difficulty

#------------------------------------------------------------------------------

# By: DrakoShade

# Version 1.1

# Last Updated: 17 March, 2008

#------------------------------------------------------------------------------

# Version History:

# V. 1.1: Updated the note-parsing methodology to work as described by "loam"

# of RMXP.org. This script's use of the Note field will no longer

# interfere with or be confused by other notes. Also, pointless

# methods for the difficulty setting have been removed.

#==============================================================================

=begin

Here, you get a chance to set the defaults for your creatures. Any creature

for which the Note tab doesn't include a modification will use the numbers

you set here. Instructions follow.

=end

module RPG

class Enemy

def get_default_gains

@maxhp_gain = 50 #Default 50

@maxmp_gain = 10 #Default 10

@atk_gain = 1.25 #Default 1.25

@def_gain = 1.25 #Default 1.25

@spi_gain = 2.5 #Default 2.5

@agi_gain = 2.5 #Default 2.5

@hit_gain = 0 #Default 0

@eva_gain = 0 #Default 0

@exp_gain = 0 #Default 0

@gold_gain = 0 #Default 0

@variance = 15 #Default 15

@min_level = 1 #Default 1

@max_level = 99 #Default 99

end

end

end



=begin ========================================================================

|| Using the Note Field to your advantage. ||

===============================================================================

The defaults that you set above are fine if you want every single enemy in the

game to follow the same growth pattern. If that's the case, you don't have to

use the Note field at all for this script. If you want your enemies to grow

in different ways from one another, then the Note field is where you make it

happen.



To do anything in the Notes with this script, you will need to include two

special lines in the box:

"=begin dynamic difficulty"

"=end dynamic difficulty"

Don't put quotes around them. Those are simply here so that this explanation

won't mess with the commenting in the script itself.

Anything that falls between those two lines will be evaluated just after the

individual enemy looks up the defaults above. Thus, if you include



@gold_gain = 200



then that specific enemy will be worth an extra 200 gold for every level it

gains, no matter what default you have set. If, instead, you use the line



@gold_gain *= 2



then the enemy is worth twice the gold-per-level of your standard. If the

standard stays at 0, of course, then it's still worth 0 a level, but you

know what I mean.



===============================================================================

|| The Minimum and Maximum Levels ||

===============================================================================

In the defaults, you may have noticed the defaults for @min_level and

@max_level. A creature for which @min_level = 1 and @max_level = 99 will gain

power as long as your party's average level is above 1, and won't stop gaining

power until level 99, which can't normally be exceeded anyway. This works

well if you intend the enemy to scale no matter what level it's encountered at,

but you can do it differently.



An enemy for which @min_level = 10, for extestle, will be at the power you set

in the database any time it's encountered by a party of level 10 or lower.

When said party hits level 11, that enemy will gain only 1 level, rather than

the 10 that anything else would gain. In this way, you can create enemies that

are never incredibly weak, but still get stronger.



@max_level is similar, but for the other end of the spectrum. An enemy for

which @max_level = 30, for instance, would scale as normal up until the party

reached that level. but if the party were level 40, it would still only grow

as if the party were level 30. Thus, this enemy stops gaining power when the

party's average level hits it's @max_level.



===============================================================================

|| Game Difficulty ||

===============================================================================

At any point, you can set the value of the game's difficulty with a simple

script call. Since it's an attr_accessor, all you have to do is one of these:

$game_system.difficulty = x

$game_system.difficulty += x

$game_system.difficulty -= x

Etcetera, so on, and so forth.



This script uses the difficulty to determine the level of the enemies, mostly

like the party's average level, but with a small difference.

When setting how powerful a monster is, for its maximum HP, attack and defense,

etc. the script will add the difficulty to the party's level. However, when

determining the rewards of experience and gold returns, the script ignores

this value.



Extestle:

An enemy at level 8 and game difficulty of 2 will be just as hard to beat as

the same enemy at level 10 and game difficulty 0, but will give rewards the

same as if you'd beat it at level 8 and difficulty 0.



===============================================================================

|| General Advice ||

===============================================================================

When designing your enemies, take into account the level at which you want them

to be a real challenge for your party. Their stats should be roughly similar

to those of a party member at their @min_level wearing the equipment you'd

expect your party to have at the target level.



In this way, although the enemy scales down to match a party whose level is

lower than expected, he still fights as if he were equipped to take on the

stronger party. The ability to defeat him will, at this point, hinge more

on your party's equipment than their level.

Of course, the act of balancing is purely up to you. My default numbers are

set so that enemies will scale with a new actor's default gains in the

database. You could retool them to scale with equipment as well, or factor

how well-equipped your enemy is into his stats at minimum level. The choice

is yours.



I hope you enjoy using this script. Happy creating.



===============================================================================

|| That's it. On to the rest of the script. ||

===============================================================================

=end

#==============================================================================

# ** Game_System

#------------------------------------------------------------------------------

# The actual difficulty of the game as a whole is added into this class.

#==============================================================================

class Game_System

attr_accessor :difficulty #New public instance variable.



#----------------------------------------------------------------------------

# * Aliasing the Initialize method.

#----------------------------------------------------------------------------

alias drakoshade_dynamic_difficulty_initialize initialize

def initialize

drakoshade_dynamic_difficulty_initialize

@difficulty = 0

end

end

#==============================================================================

# End modifications to Game_System.

#==============================================================================



#==============================================================================

# ** RPG::Enemies

#------------------------------------------------------------------------------

# Most of the magic happens here. New methods are created which allow the

# enemies to gain levels, based on a combination of both the party's average

# level and the new $game_system.difficulty.

#==============================================================================

module RPG

class Enemy

#--------------------------------------------------------------------------

# * Public Instance Variables

#--------------------------------------------------------------------------

attr_accessor :base_maxhp, :base_maxmp, :base_atk, :base_def, :base_spi

attr_accessor :base_agi, :base_hit, :base_eva, :base_exp, :base_gold

attr_accessor :maxhp_gain, :maxmp_gain, :atk_gain, :def_gain, :spi_gain

attr_accessor :agi_gain, :hit_gain, :eva_gain, :exp_gain, :gold_gain

attr_accessor :min_level, :max_level



#--------------------------------------------------------------------------

# * Set_Bases

#--------------------------------------------------------------------------

def set_bases

@base_maxhp, @base_maxmp = @maxhp, @maxmp

@base_atk, @base_def = @atk, @def

@base_spi, @base_agi = @spi, @agi

@base_hit, @base_eva = @hit, @eva

@base_exp, @base_gold = @exp, @gold

get_default_gains

eval(@note[/(?<==begin dynamic difficulty)(.*?)(?==end dynamic difficulty)/m].to_s)

end



#--------------------------------------------------------------------------

# * Update Level

#--------------------------------------------------------------------------

def update_level

levels = [([$game_party.ave_level, @max_level].min - @min_level), 0].max

diff = $game_system.difficulty

@maxhp = generate_stat(@base_maxhp-1, @maxhp_gain, (levels + diff)) + 1

@maxmp = generate_stat(@base_maxmp-1, @maxmp_gain, (levels + diff)) + 1

@atk = generate_stat(@base_atk-1, @atk_gain, (levels + diff)) + 1

@def = generate_stat(@base_def-1, @def_gain, (levels + diff)) + 1

@spi = generate_stat(@base_spi-1, @spi_gain, (levels + diff)) + 1

@agi = generate_stat(@base_agi-1, @agi_gain, (levels + diff)) + 1

@hit = generate_stat(@base_agi, @agi_gain, (levels + diff))

@eva = generate_stat(@base_eva, @eva_gain, (levels + diff))

@exp = generate_stat(@base_exp, @exp_gain, levels)

@gold = generate_stat(@base_gold, @gold_gain, levels)

end



#--------------------------------------------------------------------------

# * Generate Stat

#--------------------------------------------------------------------------

def generate_stat(base, gain, levels)

result = base + (gain * levels)

result *= (rand(@variance*2)+(100-@variance))

result /= 100

result = [result.to_i, 0].max

return result

end

end

end



#==============================================================================

# ** Game_Party

#------------------------------------------------------------------------------

# I'm adding a method here that will allow this script (or any other) to

# determine the average party level.

#==============================================================================

class Game_Party

def ave_level

level = 0

for i in @actors

actor = $game_actors

level += actor.level

end

level /= @actors.size

return level.round

end

end



#==============================================================================

# ** Scene_Title

#------------------------------------------------------------------------------

# Methods that load the database need to be altered so that the enemies set

# their bases.

#==============================================================================

class Scene_Title

#----------------------------------------------------------------------------

# *Alias the Load Database method.

#----------------------------------------------------------------------------

alias drakoshade_dynamic_difficulty_load_database load_database

def load_database

drakoshade_dynamic_difficulty_load_database

for i in 1...$data_enemies.size

$data_enemies.set_bases

end

end



#----------------------------------------------------------------------------

# *Alias the Load Battle Test Database method.

#----------------------------------------------------------------------------

alias drakoshade_dynamic_difficulty_load_bt_database load_bt_database

def load_bt_database

drakoshade_dynamic_difficulty_load_bt_database

for i in 1...$data_enemies.size

$data_enemies.set_bases

end

end

end



#==============================================================================

# ** Game_Troop

#------------------------------------------------------------------------------

# The modification here allows for greater versitility than modifying the

# battle scene in this situation. Enemies will load into the troop with

# updated stats.

#==============================================================================

class Game_Troop

#----------------------------------------------------------------------------

# *Alias the Setup method.

#----------------------------------------------------------------------------

alias drakoshade_dynamic_difficulty_setup setup

def setup(troop_id)

for i in 1...$data_enemies.size

$data_enemies.update_level

end

drakoshade_dynamic_difficulty_setup(troop_id)

end

end