torus.md

Torus

A Torus is a donut-like shape.

commands.spawn(PbrBundle {
    mesh: meshes
        .add(
            Torus {
                radius: 0.5,
                ring_radius: 0.1,
                ..default()
            }
            .into(),
        )
        .into(),
    ..default()
});

We can set the radius of the Torus and the radius (ring_radius) of the Torus's ring.

We set our camera position to (2, 1, 3) and make it looking at the origin.

The full code is as follows:

use bevy::{
    app::{App, Startup},
    asset::Assets,
    core_pipeline::core_3d::Camera3dBundle,
    ecs::system::{Commands, ResMut},
    math::Vec3,
    pbr::{PbrBundle, PointLightBundle, StandardMaterial},
    render::mesh::{shape::Torus, Mesh},
    transform::components::Transform,
    utils::default,
    DefaultPlugins,
};

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .add_systems(Startup, setup)
        .run();
}

fn setup(
    mut commands: Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<StandardMaterial>>,
) {
    commands.spawn(Camera3dBundle {
        transform: Transform::from_xyz(2., 1., 3.).looking_at(Vec3::ZERO, Vec3::Y),
        ..default()
    });

    commands.spawn(PbrBundle {
        mesh: meshes
            .add(
                Torus {
                    radius: 0.5,
                    ring_radius: 0.1,
                    ..default()
                }
                .into(),
            )
            .into(),
        material: materials.add(StandardMaterial::default()).into(),
        ..default()
    });

    commands.spawn(PointLightBundle {
        transform: Transform::from_xyz(2., 2., 1.),
        ..default()
    });
}

Result:

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