https://github.com/bfollington/gotai
reactive atomic state for godot, inspired by jotai
https://github.com/bfollington/gotai
atom godot godot-engine jotai reactive
Last synced: 7 months ago
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reactive atomic state for godot, inspired by jotai
- Host: GitHub
- URL: https://github.com/bfollington/gotai
- Owner: bfollington
- Created: 2022-01-29T04:31:49.000Z (over 3 years ago)
- Default Branch: master
- Last Pushed: 2022-01-29T04:40:22.000Z (over 3 years ago)
- Last Synced: 2025-02-07T20:30:54.316Z (9 months ago)
- Topics: atom, godot, godot-engine, jotai, reactive
- Language: GDScript
- Homepage:
- Size: 6.84 KB
- Stars: 3
- Watchers: 2
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# gotai
reactive atomic state for `godot`, inspired by `jotai`
`gotai` enables somewhat performant reactive UIs using functional programming concepts in `godot`. This project requires `godot 4` as it makes use of lambas extensively.
It works via the `Atom` type which acts as an `Observable` and can be composed with or derived from to create new `Atoms`. Visit [`Atom.gd`](https://github.com/bfollington/gotai/blob/master/Atom.gd) for the full interface.
Here's a short example of a counter rendering its value to a `Label`.
```gdscript
extends Control
@onready var counter = Atom.new(0)
@onready var doubleCounter = Atom.derive(counter, func(v): return v * 2)
# bind our render function to our state
# counter changes -> doubleCounter changes -> render is called
func _ready():
doubleCounter.bind(render)
render(doubleCounter.get())
# remove the listener if this node is inactive
func _exit_tree():
bigSum.unbind(render)
# apply state to view (side effects)
func render(c):
$Label.text = "Value is %f." % c
func inc(v):
return v + 1
# update counter by clicking button
func _on_button_pressed():
counter.swap(inc)
```