bevy-adapt-3d-to-2d

使い方

インストールコマンドをコピーし、自分の環境へ導入する前にソースを確認します。
必要なツール、認証情報、対応環境を原文で確認します。
入力と成果物を指定し、出力を資料と照合します。

npx skills add https://github.com/thedivergentai/game-design-agentic-skills --skill bevy-adapt-3d-to-2d

開始前の確認

導入にはモデル契約、API枠、ファイルへのアクセス許可は含まれません。
スター数や導入数は活動の指標であり、独立した品質・安全性試験ではありません。

リポジトリの原文

見出し、例、コード、表、リンク、参照画像を含む原文を表示しています。

Bevy adapt 3D to 2D

When to use

Load this when a 3D design should render as sprites or billboards. Gameplay components stay. Render components change.

ECS shape

Draw: replace mesh and PBR material entities' render parts with Sprite where a billboard is enough.
Camera: use Camera2d from bevy-camera-systems.
Lights: 3D light entities are not required for an unlit sprite. Do not leave clustered-light assumptions in gameplay code.

Coming from Godot

Godot idea	Bevy idiom
Mesh actor	Sprite plus the same gameplay components.
Perspective camera	Camera2d.
Height	A sort value you store. No 2.5D engine mode was opened.

Scope

Check the sprite and mesh docs.rs pages for billboard and impostor types before writing them.
Physics dimension change belongs with the physics skills once you choose a solver.

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 on latest; 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 convert-to-2D operations. 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 latest branch.
ECS - Component, systems, Query, Startup, Update, and .chain().
Plugins - Plugin, DefaultPlugins, MinimalPlugins, and add_plugins.

Related Skills

Prerequisites

bevy-master - Hub and schedules.
bevy-ecs-composition - Components and systems.
bevy-camera-systems - Camera2d.
bevy-2d-animation - Sprite clips.

Complements

bevy-adapt-2d-to-3d - The reverse adapt.
godot-adapt-3d-to-2d - Equivalent Godot skill.

Downstream / consumers

None yet.

Master

bevy-master - Bevy router.

使い方