Bevy Talks

[!WARNING] bevy_talks is in development. The API is young and will change. Feedback is very welcome.

A dialogue system for Bevy. Author conversations as branching graphs, load them as assets, and play them back through events.

• A dialogue database asset: actors and conversations in .dialogue.ron files. Every actor, conversation, and entry carries an extensible fields bag for your custom data.
• Conversations as graphs: entries (lines, player choices, group nodes) connected by links. NPC lines flow automatically; player entries become choice menus.
• An event-driven runtime: spawn a DialogueRunner, observe SubtitleStarted, ResponseMenuOpened, and ConversationEnded, and drive it with AdvanceConversation / ChooseResponse.
• A variable store: a Variables resource seeded from the database, the shared state that dialogue and gameplay read and write.
• A visual editor: a Bevy app with a node canvas and inspector for authoring databases without writing RON by hand.

📖 The full manual lives in the book.

Quick look

use bevy::prelude::*;
use bevy_talks::prelude::*;

fn main() {
    App::new()
        .add_plugins((DefaultPlugins, TalksPlugin))
        .add_systems(Startup, start)
        .add_observer(on_line)
        .run();
}

fn start(mut commands: Commands, assets: Res<AssetServer>) {
    let database: Handle<DialogueDatabase> = assets.load("test.dialogue.ron");
    commands.spawn(DialogueRunner::new(
        database,
        ConversationRef::Title("Test".to_owned()),
    ));
}

fn on_line(line: On<SubtitleStarted>, mut commands: Commands) {
    println!("{}", line.subtitle.text);
    // Show the line in your UI; when it's done:
    commands.trigger(AdvanceConversation { entity: line.entity });
}

Try it in your terminal:

cargo run --example terminal

The editor

The tools/editor workspace crate is a visual editor for .dialogue.ron files: a node canvas for the conversation graph and an inspector for entries, actors, and their fields.

cargo run -p editor

Bevy version support

License

Dual-licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or https://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.