add(/wiki/cellularautomata): minimal article with references

Also made a smol logo depicting a Conway Glider, just because.

Author: Longor1996

.vscode/spellright.dict

@@ -33,3 +33,4 @@ quadliteral
 phasegen
 simulatable
 wikipedia-oop
+cellularautomata

content/_index.md

@@ -21,6 +21,11 @@ title = "Data Management"
 content = "There are many ways to <a href='wiki/datastructures'>structure</a>, <a href='wiki/accelerationstructures'>optimize</a>, <a href='wiki/serialization'>serialize</a> and <a href='wiki/compression'>compress</a> voxels, all with their own pros and cons..."
 #link = "/wiki/datastructures"
 
+[[extra.list]]
+title = "Interactivity & Gameplay"
+content = "Want to bring your world of voxels to life? Then you'll have to deal with <a href='/wiki/cellularautomata'>cellular automata</a>, physics, sounds, NPCs, etc.!"
+#link = "/wiki/interactivity"
+
 [[extra.list]]
 title = "Procedural Generation"
 content = "Creating worlds from nothing but math, with the art(!) of procedural generation!"

content/wiki/cellularautomata/CellularAutomata.drawio.svg

@@ -0,0 +1,46 @@
++++
+title = "Cellular Automata"
+description = "A set of rules applied to a grid of cells with finite states."
+path = "/wiki/cellularautomata"
+aliases = ["/wiki/cellular-automata", "/wiki/cellularautomaton", "/wiki/cellular-automaton", "/wiki/ca"]
+[taxonomies]
+categories = ["cellular-automata"]
+tags = ["simulation", "gameplay", "physics"]
++++
+
+{% figure(class="float cover", caption="A glider from <a href='https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life'>Conway's Game of Life</a>.", author="Lars Longor K", license="CC0") %}/wiki/cellularautomata/CellularAutomata.drawio.svg{% end %}
+
+A **cellular automaton** <small>(plural: *automata*)</small>, like *Conway's Game of Life*, is a set of rules that are repeatedly applied to a grid of cells, or a graph of nodes and edges, with finite states.
+
+<!-- more -->
+
+Since voxels are, [by definition](/wiki/introduction), cells in a grid,
+we can implement various automata to create *a whole lot* of different behaviours
+that act across/between voxels.
+
+Not adding any automata to a voxel game is a *terrible* shame,
+as they're part of the special sauce[^specialsauce] that makes voxel games so great!
+
+## Common Uses
+
+Since there are entirely too many ways to implement and make use of cellular automata, we'll list just a few of the most common ones:
+
+- Falling sand, gravel, grain, etc.
+- Simulation of fluids like water, lava and gas.
+- Growth and spread of plants, like grass and trees.
+- Electricity and digital logic, like [redstone](https://minecraft.wiki/w/Redstone_mechanics).
+- ...
+
+{% todo_notice() %} Articles for each of the above? {% end %}
+
+## References
+
+- [Wikipedia: Cellular Automaton](https://en.wikipedia.org/wiki/Cellular_automaton)
+- [Wikipedia: Conway's Game of Life](https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life)
+- [Stanford Encyclopedia](https://plato.stanford.edu/entries/cellular-automata/)
+- [EBSCO Article](https://www.ebsco.com/research-starters/science/cellular-automata)
+- [Wolfram MathWorld](https://mathworld.wolfram.com/CellularAutomaton.html)
+
+---
+
+[^specialsauce]: The other parts are user-driven creation & destruction.