Editing Saturation

== General mechanics ==

* '''Maximum nutrition''', or how much nutrition a pawn can store at any one time. It is dependent on the [[body size]] of the species as well as the ''body size factor'' and ''food max factor'' according to the pawns life stage. The function is <code>species_body_size × body_size_factor × food_max_factor</code>. For adult specimens ''body size factor'' and ''food max factor'' are both 1. An adult [[human]] (with a body size of {{Q|Human|Body Size}}) can therefore hold up to {{Q|Human|Body Size}} nutrition.

*** ''Baby (0-2 years)'': {{Q|Human|Body Size}} × 0.2 × 0.625 = {{#expr:{{Q|Human|Body Size}}*0.2*0.625}} maximum nutrition

*** ''Child (3-12 years)'': {{Q|Human|Body Size}} × 0.35 × 2.286 = {{#expr:{{Q|Human|Body Size}}*0.35*2.286}} maximum nutrition

*** ''Teenager (13-17 years)'': {{Q|Human|Body Size}} × 0.8 × 1.25 = {{#expr:{{Q|Human|Body Size}}*0.8*1.25}} maximum nutrition (therefore same as adults)

*** ''Larva'': species_body_size × 0.2 × 2 = species_body_size × 0.4

* '''Hunger Rate''', or how much nutrition a pawn loses per day. Adult baseline humans hunger at a rate of 1.6 nutrition per day. This is determined by species and the [[Hunger Rate Factor]] explained below.

 

=== Levels of saturation ===

! Mood modifier<br/>(Humans)

! Production Rate<br/>(Animals)

When malnourished, pawns gain severity in "[[malnutrition]]". Malnutrition is an [[ailment]], with an entirely separate progression to hunger or saturation. When malnourished, ''malnutrition'' severity rises by 2% every hour, and once it reaches 100%, the pawn will die. When a pawn is fed, their malnutrition does not immediately go away, though a pawn will no longer gain malnutrition (as Saturation is no longer at 0%).  

For as long as the malnutrition ailment is active, pawns will gain increased hunger. This does not increase the rate of malnutrition severity, just the amount of food eaten after a pawn has been fed. The malnutrition severity decreases at the same rate it increases.

== Saturation changes ==

Saturation goes down every tick (1/2500 of a game hour, or 1/60 a second at level 1 game speed), depending on the character's current saturation and modifiers on their hunger rate.

| 0% <ref>Malnourished state does not impact saturation directly. Rather, it increases the "[[Malnutrition]]" [[ailment]] by 2% per hour, and if this reaches 100%, a pawn dies. This ailment will increase hunger rate of a pawn, but only after they have eaten again.</ref>

| 0%

== Hunger Rate Factor ==

{{Stub|section=1|reason=Verify (and add?) modifiers from biotech. Verify in which order the modifiers are applied.}}

The following things will modify hunger rate:

All hunger rate factor ''offset'' modifiers stack additively. Once added up, they stack multiplicatively with other modifiers to hunger.

* [[Gut worms]]: {{++|100%}}

** [[Reprocessor stomach]]{{RoyaltyIcon}}: {{---|25%}}

** [[Nuclear stomach]]{{RoyaltyIcon}}: {{---|75%}}

*** ''Note that the effect of these implants is displayed on the item and hediff info cards as a multiplier ('''''x75%''''' and '''''x25%''''' respectively), but they work like an offset on the actual Hunger rate stat.''

* [[Hypothermic slowdown]]:

** Moderate: {{---|10%}}

** Serious: {{---|40%}}

** Extreme: {{---|95%}}

** Trivial: {{++|50%}}

** Minor, Moderate, Severe and Extreme: {{++|60%}}

* [[Persona weapon#Hunger pangs|Hunger pangs]] persona trait{{RoyaltyIcon}}: {{++|50%}}

* [[Neural supercharger]]{{IdeologyIcon}}: {{++|20%}}

* [[Growth vat#Summary|Bio-starvation]] (outside of [[growth vat|vat]]){{BiotechIcon}}: {{++|50%}}

 

 

 

Despite its name and description, the [[Metabolism]] stat has no impact on hunger rate. The pawn capacity is renamed to Digestion in [[Biotech DLC]] and Metabolic efficiency is used instead for the gene mechanics.

This makes [[kibble]] and [[pemmican]] particularly useful as feed for smaller sized animals. These foods provide more nutrition than raw food, but will waste far less nutrition than a regular meal would.

== Analysis ==

Due to the low food consumption of animals, as well as the efficiency of meals, it is possible to violate the law of conservation of energy. For example, a female [[cow]] produces {{Icon Small|milk}} {{Q|Cow|Daily Milk Average}} per day, or {{#vardefineecho:milk_nutr_per_day|{{#expr:{{Q|Cow|Daily Milk Average}}*0.05}}}} [[nutrition]] in milk per day. A cow consumes {{Q|Cow|Real Hunger Rate}} nutrition per day. While cows cannot consume milk, almost all animals can consume meals, no matter what the meal is made out of. So when a cow's milk is turned into [[nutrient paste meal]]s or even [[simple meal]]s, it can feed itself with plenty of food to spare. This gets even sillier with [[chicken]]s, which produce more nutrition in [[egg]]s than they consume per day, even before the eggs are cooked. (Note that chickens cannot eat their own eggs, and that they are very prone to overeating.)

=== Conserving food via malnutrition ===

In extreme situations, it may be advisable to stay in a hungry state to benefit from the reduced hunger and in malnourished state to benefit from zero hunger rate at 0% saturation.{{Check Tag|Verify Mal|Malnutrition increases hunger rate after they eat again, and the worked example below only covers feeding when hungry. Another example for mal would be good to provide proof and say when best time in malnourished to eat is}} Note that this requires significant micromanagement to pull off. Forbid the food and unforbid it when pawns are about to fall unconscious.

Consider, for example, a human at 0% saturation and 0% malnutrition. This pawn has 0.9 nutrition (one simple meal) to eat.

| 50 || Starving until death from malnutrition

| 13.75 || Starving up to 27.5% malnutrition (minor)

| 3.75 || Fed state with 27.5–20% malnutrition (minor)

| 2.50 || Fed state with 20–15% malnutrition (trivial)

| 2.50 || Hungry state with 15–10% malnutrition (trivial)

| 5.00 || Ravenously hungry state with 10–0% malnutrition (trivial)

| 50 || Starving until death from malnutrition

{{Nav|status levels|wide}}