Come usare
- Copia il comando e controlla il pacchetto prima di installarlo nel tuo ambiente agente.
- Controlla strumenti, credenziali e ambienti richiesti nel documento originale.
- Descrivi input e risultato desiderato; confronta l’output con le fonti.
npx skills add https://github.com/thedivergentai/game-design-agentic-skills --skill bevy-tweeningPrima di iniziare
- L’installazione non include abbonamenti, quote API o accesso ai file.
- Stelle e installazioni indicano attività, non un test indipendente di qualità o sicurezza.
Documento Skill originale
Contenuto dal repository con titoli, esempi, codice, tabelle, link e immagini preservati.
Bevy tweening
When to use
Load this when a value should ease over time. A tween player is yours to build in ECS from elapsed time.
ECS shape
- Feature:
bevy_curveis described as mathematical curves, not a tween player. - Components: a tween would be your own start, end, and elapsed fields until a player type is opened.
- Systems: step elapsed time on
Updateor the fixed clock (Fixedon bevy::time, already used by character movement). - Animation: property animation over a clip is
AnimationClipon bevy-animation. That is a clip, not a one-shot UI tween.
Coming from Godot
| Godot idea | Bevy idiom |
|---|---|
| Property tween | Either your elapsed component or an AnimationClip. No Tween type was opened. |
| Sequence | Chain systems or clip order. No sequence asset was opened. |
| Callback on finish | An AnimationEvent exists for clips. Check the animation docs for a tween callback type before writing one. |
Scope
- Check the
bevy::curvemodule for curve sample methods before writing them. - No tween crate was chosen.
Expert Knowledge Delta
Target: Bevy 0.20+.
Core ECS types: Component, Resource, Query, Commands, Startup, Update, Fixed / FixedMain (bevy::time), .chain(), Plugin, DefaultPlugins, MinimalPlugins. Messages and observers are an ownership slot. See bevy-events-messaging for their APIs. Systems run in parallel unless .chain() orders the ones that conflict.
Who owns state
| Piece | Owner | Who may mutate | Schedule |
|---|---|---|---|
| Data on one entity | Component | One system via Query | Update or FixedMain |
| One value for the whole app | Resource | One system | Startup to insert, then the schedule that reads it |
| Spawn | Commands | The spawning system | Startup for the initial world; later schedules for runtime spawn |
| Order that must not race | .chain() | The chained systems only | Same schedule |
| Plugin boundary | Plugin | build registers systems and resources | Before the app runs |
Borrow rule: two systems that both mutably query the same component must be ordered (.chain()) or split so only one writes. Unrelated systems stay parallel. That is the ECS page rule, not a guess at a system-set API.
Decision
| If you need | Do this | Do not |
|---|---|---|
| Per-entity data | Component + Query | A Godot node script |
| App-wide config or clock | Resource | Copy the value onto every entity |
| Stable simulation step | FixedMain and the Fixed clock | Tie simulation to raw frame Update |
| Startup spawn | Commands in Startup | Spawn from a render system |
| Cross-system notice that is not shared state | Message or observer slot in bevy-events-messaging | A new event type invented in this file |
| An API outside the documented set | Check the official docs first | A made-up crate or API |
Load references/ecs-ownership.md for the ownership table.
NEVER
- Do not pin
/0.20.0/in docs URLs. WHY: links stay onlatest; the 0.20 target is stated once in prose. - Do not mutably query the same component from two unordered systems. WHY: the schedule runs systems in parallel unless
.chain()orders them. - Do not invent a physics, navigation, networking, or XR crate here. WHY: this skill only names documented Bevy crates and modules.
- No Godot Tween node. WHY: Bevy code stays idiomatic ECS and uses only documented Bevy APIs.
- No named tween crate as the chosen solution. WHY: Bevy code stays idiomatic ECS and uses only documented Bevy APIs.
- No Godot types in Bevy code. WHY: Bevy code stays idiomatic ECS and uses only documented Bevy APIs.
- No invented APIs or unnamed third-party crates as the chosen solver. WHY: Bevy code stays idiomatic ECS and uses only documented Bevy APIs.
Reference
docs.rs links use the unversioned latest permalink. The library pin on bevy-master stays 0.20.0.
Official Documentation
- Migration guides - Unversioned hop index.
- bevy crate - API reference and Cargo feature list.
- Assets - Official asset catalog. No third-party crate was selected.
- Examples - Example tree on the
latestbranch. - ECS -
Component, systems,Query,Startup,Update, and.chain(). - Plugins -
Plugin,DefaultPlugins,MinimalPlugins, andadd_plugins. - bevy::curve - Curve trait module reference.
Related Skills
Prerequisites
- bevy-master - Hub and schedules.
- bevy-ecs-composition - Components and systems.
- bevy-animation - Clip-based property animation.
- bevy-master - Fixed clock name.
Complements
- godot-tweening - Equivalent Godot skill.
Downstream / consumers
- None yet.
Master
- bevy-master - Bevy router.
