https://github.com/choppedstudio/bevy_ecs_markers

🏷️ Markers for Bevy ECS Entities
https://github.com/choppedstudio/bevy_ecs_markers

bevy

Last synced: 3 months ago
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🏷️ Markers for Bevy ECS Entities

• Host: GitHub
• URL: https://github.com/choppedstudio/bevy_ecs_markers
• Owner: ChoppedStudio
• License: apache-2.0
• Created: 2022-12-18T12:55:16.000Z (about 2 years ago)
• Default Branch: main
• Last Pushed: 2024-03-17T18:51:55.000Z (10 months ago)
• Last Synced: 2024-09-22T11:32:28.795Z (4 months ago)
• Topics: bevy
• Language: Rust
• Homepage: https://crates.io/crates/bevy_ecs_markers
• Size: 48.8 KB
• Stars: 11
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE-APACHE

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README

        
# Bevy ECS Markers

[![Crates.io](https://img.shields.io/crates/v/bevy_ecs_markers.svg)](https://crates.io/crates/bevy_ecs_markers)

[![MIT/Apache 2.0](https://img.shields.io/badge/license-MIT%2FApache-blue.svg)](https://github.com/ChoppedStudio/bevy_ecs_markers#license)

Adds the support for marking entites and fetching them in queries

## Example

View more examples [here](examples/)

```rust

#[derive(EntityMarker)]

enum Players {

    Red,

    Blue,

    Green,

    Yellow,

}

#[derive(Component)]

struct Player {

    field: usize,

}

fn main() {

    App::new()

        .add_plugins(LogPlugin::default())

        .init_marker::()

        .add_systems(Startup, (setup, move_red_player).chain())

        .run();

}

fn setup(mut commands: Commands, mut players: MarkerMut) {

    players[Players::Red].assign(commands.spawn(Player { field: 2 }).id());

    players[Players::Blue].assign(commands.spawn(Player { field: 5 }).id());

    players[Players::Green].assign(commands.spawn(Player { field: 7 }).id());

    players[Players::Yellow].assign(commands.spawn(Player { field: 1 }).id());

}

fn move_red_player(mut query: Query<&mut Player>, current: Marker) {

    let Ok(mut player) = query.get_mut(current[Players::Red].id()) else {

        warn!("Red Player not set yet!");

        return;

    };

    let old = player.field;

    player.field += 2;

    let new = player.field;

    info!("Player moved from field {old} to field {new}");

}

```

## License

- MIT License ([LICENSE-MIT](LICENSE-MIT) or [http://opensource.org/licenses/MIT](http://opensource.org/licenses/MIT))

- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or [http://www.apache.org/licenses/LICENSE-2.0](http://www.apache.org/licenses/LICENSE-2.0))

at your option.