Difference between revisions of "Liquid"

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'''Liquids''' are special dynamic [[block]]s in Minetest.
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'''Liquids''' are special dynamic [[block]]s in Luanti. They behave quite differently than in real life. Liquids like to spread and flow to their surrounding blocks and players can swim and drown in them.
  
 
== Liquid forms ==
 
== Liquid forms ==
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=== Liquid source ===
 
=== Liquid source ===
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Liquid sources have the shape of a cube. A liquid source will generate flowing liquids around it from time to time. Liquid sources are usually subject to [[gravity]].
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Liquid sources have the shape of a full cube. A liquid source will generate flowing liquids around it from time to time, and, if the liquid is renewable, it also generates liquid sources (see below). A liquid source can sustain itself. If no special event happens, a liquid source will keep its place forever and it will never drain out.
  
 
=== Flowing liquid ===
 
=== Flowing liquid ===
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Flowing liquids take a “sloped” form and never the shape of a cube. Flowing liquids spread around the map until they drain. Flowing liquids are subject to gravity.
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Flowing liquids take a “sloped” form and never the shape of a cube. Flowing liquids spread around the map until they drain. A flowing liquid can not sustain itself and always comes from a liquid source, either directly or indirectly. Without a liquid source, a flowing liquid will eventually drain out and disappear.
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== Liquid properties ==
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[[Image:Liquid_range_2.png|thumb|170px|A liquid with a flowing range of 2, viewed from above]]
  
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=== Liquid properties ===
 
 
All liquids share the following properties:
 
All liquids share the following properties:
 
* ''All properties of [[blocks]]''
 
* ''All properties of [[blocks]]''
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* Viscosity: How fast [[player]]s can move through it and how fast new flowing liquids are generated, move and fall
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* Renewability: Renewable liquids can create new sources (see below)
 
* Flowing range: How many flowing liquids are created at maximum per liquid source, it determines how far the liquid will “spread”. This is a number ranging from 0 to 8. If 0, no flowing liquids are generated at all. Usually, liquids have a flowing range of 8
 
* Flowing range: How many flowing liquids are created at maximum per liquid source, it determines how far the liquid will “spread”. This is a number ranging from 0 to 8. If 0, no flowing liquids are generated at all. Usually, liquids have a flowing range of 8
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* Renewability: Renewable liquids have the property that new sources can be created when two or more sources are next to each other.
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* Viscosity: How slow [[player]]s move through it and how fast new flowing liquids are created (i.e. how fast the liquid spreads)
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* Drowning damage: If set, it will a) reduce your [[Player#Breath|breath]] (“bubbles”) while you are inside and b) will cause this amount of damage to you every 2 seconds if you ran out of breath while inside
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== Behaviour ==
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<!-- TODO: Explain flowing -->
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=== Creation of liquid sources ===
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Renewable liquid sources create new liquid sources at open spaces. A new liquid source is created when:
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* Two renewable liquid blocks of the same type touch each other diagonally
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* These blocks are also on the same height
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* One of the two “corners” is open space which allows liquids to flow in
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When those criteria are met, the open space is filled with a new liquid source of the same type.
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<gallery widths="400px" heights="256px">
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Liquid_renewing_part1.png|2 liquid sources (S) touch each other diagonally, but are seperated by solid blocks.
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Liquid_renewing_part2.png|The solid block at the top “corner” has been removed and a completely new liquid source block fills the empty space shortly after.
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Non-renewable liquid.png|For comparison, a non-renewable liquid just flows (F) instead.</gallery>
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== Interaction with liquids ==
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=== Swimming and diving ===
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Swimming in a liquid is fairly straightforward: The usual direction keys for basic movement, the jump key for rising and the sneak key for sinking. Note that the controls are different if the [[Controls#Pitch move mode|pitch move mode]] is enabled.
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The physics for swimming and diving in a liquid are, in detail:
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* Your movement speed in a liquid is determined by its viscosity
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* If you don't do anything in a liquid, you will slowly sink
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* There is no fall damage for falling into a liquid as such
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* If you fall from a great height into a liquid, you will be slowed down on impact (but you don't come instantly to a halt). Depending on your speed, you might end up deep in the liquid. The slow-down effect is much stronger for liquids with a high viscosity. For a safe high drop into a liquid, you need to make sure there is enough liquid above the ground, otherwise you might still suffer fall damage by hitting the ground.
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* Liquids may cause breath loss and drowning damage (see above)
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=== Pointing to liquids ===
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Liquids are usually not [[Pointing|pointable]]. However, all liquids can be pointed by special items. In [[Games/Minetest Game|Minetest Game]], one example is the [[bucket]]. For a full list of items which are able to point to liquids, see [[:Category:Liquid pointers]].
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== Liquids in [[Games/Minetest Game|Minetest Game]] ==
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The following liquids exist in Minetest Game:
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{| class="wikitable"
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!
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! Liquid
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! Renewable<ref>Renewable according to the method explained above</ref>
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! Flowing range
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! Viscosity
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! Drowning damage
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|-
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| [[File:Water.png | 32px]] || [[Water]]
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| Yes
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| 8
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| 1
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| {{Heart|0.5}}
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|-
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| [[File:River_Water.png | 32px]] || [[River Water]]
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| No<ref>Note that river water can be renewed by a different method, however</ref>
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| 2
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| 1
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| {{Heart|0.5}}
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|-
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| [[File:Lava.png | 32px]] || [[Lava]]
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| No
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| 8
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| 7
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| {{Heart|0.5}}
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|-
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|}
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<references/>
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Quick facts:
  
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== Liquids in the [[vanilla Minetest game]] ==
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* Liquids can be collected by a [[bucket]].
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The only liquids in the vanilla Minetest game are:
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* Liquids can flow into and destroy [[snow]].
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*[[Water]]
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* Lava will be cooled into [[obsidian]] or [[stone]] by [[water]], [[River Water|river water]], and [[:Category:Cools lava|other blocks]].
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*[[River Water]]
 
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*[[Lava]]
 
  
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[[Category:Liquid]]
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[[Category:Liquid]] [[Category:Gameplay]]

Latest revision as of 23:23, 22 October 2024

Languages Language: English • Deutsch • français

Liquids are special dynamic blocks in Luanti. They behave quite differently than in real life. Liquids like to spread and flow to their surrounding blocks and players can swim and drown in them.

Liquid forms

Liquids usually come in two forms: In source form and in flowing form.

Liquid source

Liquid sources have the shape of a full cube. A liquid source will generate flowing liquids around it from time to time, and, if the liquid is renewable, it also generates liquid sources (see below). A liquid source can sustain itself. If no special event happens, a liquid source will keep its place forever and it will never drain out.

Flowing liquid

Flowing liquids take a “sloped” form and never the shape of a cube. Flowing liquids spread around the map until they drain. A flowing liquid can not sustain itself and always comes from a liquid source, either directly or indirectly. Without a liquid source, a flowing liquid will eventually drain out and disappear.

Liquid properties

A liquid with a flowing range of 2, viewed from above

All liquids share the following properties:

  • All properties of blocks
  • Renewability: Renewable liquids can create new sources (see below)
  • Flowing range: How many flowing liquids are created at maximum per liquid source, it determines how far the liquid will “spread”. This is a number ranging from 0 to 8. If 0, no flowing liquids are generated at all. Usually, liquids have a flowing range of 8
  • Viscosity: How slow players move through it and how fast new flowing liquids are created (i.e. how fast the liquid spreads)
  • Drowning damage: If set, it will a) reduce your breath (“bubbles”) while you are inside and b) will cause this amount of damage to you every 2 seconds if you ran out of breath while inside

Behaviour

Creation of liquid sources

Renewable liquid sources create new liquid sources at open spaces. A new liquid source is created when:

  • Two renewable liquid blocks of the same type touch each other diagonally
  • These blocks are also on the same height
  • One of the two “corners” is open space which allows liquids to flow in

When those criteria are met, the open space is filled with a new liquid source of the same type.

  • 2 liquid sources (S) touch each other diagonally, but are seperated by solid blocks.

  • The solid block at the top “corner” has been removed and a completely new liquid source block fills the empty space shortly after.

  • For comparison, a non-renewable liquid just flows (F) instead.

Interaction with liquids

Swimming and diving

Swimming in a liquid is fairly straightforward: The usual direction keys for basic movement, the jump key for rising and the sneak key for sinking. Note that the controls are different if the pitch move mode is enabled.

The physics for swimming and diving in a liquid are, in detail:

  • Your movement speed in a liquid is determined by its viscosity
  • If you don't do anything in a liquid, you will slowly sink
  • There is no fall damage for falling into a liquid as such
  • If you fall from a great height into a liquid, you will be slowed down on impact (but you don't come instantly to a halt). Depending on your speed, you might end up deep in the liquid. The slow-down effect is much stronger for liquids with a high viscosity. For a safe high drop into a liquid, you need to make sure there is enough liquid above the ground, otherwise you might still suffer fall damage by hitting the ground.
  • Liquids may cause breath loss and drowning damage (see above)

Pointing to liquids

Liquids are usually not pointable. However, all liquids can be pointed by special items. In Minetest Game, one example is the bucket. For a full list of items which are able to point to liquids, see Category:Liquid pointers.

Liquids in Minetest Game

The following liquids exist in Minetest Game:

Liquid Renewable[1] Flowing range Viscosity Drowning damage
Water.png Water Yes 8 1 Half heart.png
River Water.png River Water No[2] 2 1 Half heart.png
Lava.png Lava No 8 7 Half heart.png
  1. ↑ Renewable according to the method explained above
  2. ↑ Note that river water can be renewed by a different method, however

Quick facts:

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