Bevy + Lyon = ❤

bevy_prototype_lyon enables Bevy users to draw 2D shapes and paths, like triangles, circles, rectangles, lines, arcs and beziers.

Try out the live demo!

How does it work?

Currently Bevy does not support drawing custom shapes in an easy way. This crate uses a variation of Bevy's SpriteBundle with custom meshes to draw shapes. The lyon crate is used to generate those custom mesh.

Changelog

0.2.0

• Complete API reworking
• Regular polygon support
• Extensible shape system through Geometry trait

0.1.5

• updated dependency to lyon_tessellation v0.17
• with lyon_tessellation v0.17, unfortunately rectangles with rounded borders are no longer supported.
• Quad, Triangle and Polyline have been substituted by a general-purpose Polygon shape.

Usage

Add the following line in your cargo.toml manifest file, under the [dependencies] section:

bevy_prototype_lyon = "0.2"

Then, you can start by drawing simple shapes:

use bevy::prelude::*;
use bevy_prototype_lyon::prelude::*;

fn main() {
    App::build()
        .add_plugins(DefaultPlugins)
        .add_plugin(ShapePlugin)
        .add_startup_system(setup.system())
        .run();
}

fn setup(commands: &mut Commands, mut materials: ResMut<Assets<ColorMaterial>>) {
    let circle = shapes::Circle {
        radius: 100.0,
        ..shapes::Circle::default()
    };

    commands
        .spawn(Camera2dBundle::default())
        .spawn(GeometryBuilder::build_as(
            &circle,
            materials.add(ColorMaterial::color(Color::AQUAMARINE)),
            TessellationMode::Fill(FillOptions::default()),
            Transform::default(),
        ));
}

Don't forget to check out the examples to learn more!