Difficulty scaling/en: Difference between revisions

<languages/>

'''Difficulty scaling''' is a mechanic in ''Breath of the Wild'' that results in enemies and weapons being progressively replaced by more powerful variants during a playthrough.

== Points ==

The scaling system is based on a point system. Killing enemies is the ''only way'' to receive points.

The subsystem provides two functions ([[Difficulty scaling#Ecosystem::LevelSensor::scaleWeapon|<code>scaleWeapon</code>]] and [[Difficulty scaling#Ecosystem::LevelSensor::scaleActor|<code>scaleActor</code>]]) that may be called when a weapon or enemy actor is created.

Both scaling functions will immediately return without doing anything if:

* [[WorldMgr]]::sInstance-&#x3E;stageType == 1 (Open World [[stage]])

* '''For Hinox weapons''': The flag <code>{MapName}_Necklace_{i}_{HinoxName}_{ID}</code> is false.

* '''For other enemy drops''': The flag <code>{MapName}_WeaponDrop_{ID}</code> is false, '''and''' [the actor property 'LevelSensorMode' is higher than 1 ''or'' the enemy is a Guardian Scout ('Enemy_Guardian_Mini')].

Note: Weapons that are bought from a shop cannot receive modifiers because they do not fit into any of the above cases.

== Weapon bonuses ==

Scaling of weapons are divided into three steps: Does the weapon get replaced by a different (better weapon)?

Which of the stats (among attack, guard, durability etc) is increased?

=== Bonus values ===

Bonus values (e.g. the durability or attack power increase) are determined from [[ActorParam/GeneralParamList]] (with a copy of the information in [[ActorInfoData]]). Valid ranges and bonuses for each weapon are configured in the WeaponCommon section.

==== Non-amiibo ====

{|class="wikitable"

! Bonus !! Value that is used for the bonus effect

=== Bonus types ===

Weapon bonuses (e.g. Durability Up, Attack Up) are entirely random. Each bonus has equal probability.

{|class="wikitable"

! Bonus !! Available in modifier tiers

== Enemies ==

When loading enemies, the game will always try to scale enemies.

[1.3.0] In Master Mode, '''all''' enemies are automatically ranked up one tier by default '''post scaling''', independently of 'LevelSensorMode'. Actors can receive two additional parameters:

{| class="wikitable"

! Description

|-

Internally and in assets such as [[Map unit|map units]], the following values are used for modifiers:

{| class="wikitable"

|-

| 0

=== <code>Ecosystem::LevelSensor::loadByml</code> ===

This function is called by <code>Ecosystem::init</code> from <code>ksys::InitializeApp</code>

=== <code>Ecosystem::LevelSensor::calculatePoints</code> ===

Called by [[PlacementMgr]] when spawning actors.

Interestingly, the game calculates a single point value based on the kill counter flags but calculates two separate values for weapons and enemies with two different multipliers. This format makes it possible to easily change the scaling.

<source lang="c++">

     int kill_count = GameData::getIntegerFlag(kill_flag["name"]);

     points += kill_count * kill_flag["point"];

this->points = points;

this->weapon_points = points * this->byml["setting"].Level2WeaponPower;

this->enemy_points = points * this->byml["setting"].Level2EnemyPower;

</source>

In practice, settings have never been modified. 1.5.0 (which will likely be the last game update) still has the same Level2WeaponPower and Level2EnemyPower.

=== <code>Ecosystem::LevelSensor::scaleWeapon</code> ===

Called from treasure chest code, enemy actors{{Check}}, <code>Ecosystem::LevelSensor::scaleActor</code>

Pseudocode (1.0.0):

<source lang="c++">

=== <code>Ecosystem::LevelSensor::scaleActor</code> ===

Analogous to <code>LevelSensor::scaleWeapon</code>.

Pseudocode (1.0.0):

<source lang="c++">

== The Data ==

To make things easier to understand, here are links to:

* [https://docs.google.com/spreadsheets/d/e/2PACX-1vRSlyOD7FLAn1TUBn64Pu8Pld-WOfgcVByuywHMWvBTEV0j8potD1wkBs-MJJXf-gvEkpfItUCMqMk6/pubhtml kill point, enemy scaling and weapon scaling tables]

== Ganon Blights ==

Ganon blights also have varying difficulty but follow a different system. Their health is determined by the base HP (set in [[ActorParam/GeneralParamList|GeneralParamList]]) and blight defeat flags.

<source lang="c++">__int64 SiteBoss::getInitialHP(SiteBoss *this) // 0x71002D01F4

{

   return baseHp + multiplier * halfBaseHp;

}</source>

Effectively, this means that the first blight Link fights will have 800+0×400 = 800 HP, the second will have 800+1×400 = 1200 HP, the third 800+2×400 = 1600 HP and the last one 800+3×400 = 2000 HP.

=== Special case 1: Castle Blights ===

Castle blights have <code>IsRemainBoss</code> set to false in their root AI parameters (see [[AIDef:AI/SiteBossSpearRoot]] for example), which sets flag 4.

=== Special case 2: DLC2 Blights ===

Illusory Realm blights possess the <code>EnemySiteBoss_R</code> actor tag. This causes flag 8 to be set. So they will always have 500+4×250 = 1500 HP.

Interestingly, the Windblight AI function relies doesn't check the actor tag but the actor name instead. For flag 8 to be set, the actor name must be <code>Enemy_SiteBoss_Bow_R</code>.

<references />

[[Category:Internals]]

[[Category:Game mechanics]]