bevy/examples/2d/2d_shapes.rs

//! Shows how to render simple primitive shapes with a single color.

use bevy::{prelude::*, sprite::MaterialMesh2dBundle};

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<ColorMaterial>>,
) {
    commands.spawn(Camera2dBundle::default());

    // Circle
    commands.spawn(MaterialMesh2dBundle {
        mesh: meshes.add(shape::Circle::new(50.).into()).into(),
        material: materials.add(ColorMaterial::from(Color::PURPLE)),
        transform: Transform::from_translation(Vec3::new(-150., 0., 0.)),
        ..default()
    });

    // Rectangle
    commands.spawn(SpriteBundle {
        sprite: Sprite {
            color: Color::rgb(0.25, 0.25, 0.75),
            custom_size: Some(Vec2::new(50.0, 100.0)),
            ..default()
        },
        transform: Transform::from_translation(Vec3::new(-50., 0., 0.)),
        ..default()
    });

    // Quad
    commands.spawn(MaterialMesh2dBundle {
        mesh: meshes
            .add(shape::Quad::new(Vec2::new(50., 100.)).into())
            .into(),
        material: materials.add(ColorMaterial::from(Color::LIME_GREEN)),
        transform: Transform::from_translation(Vec3::new(50., 0., 0.)),
        ..default()
    });

    // Hexagon
    commands.spawn(MaterialMesh2dBundle {
        mesh: meshes.add(shape::RegularPolygon::new(50., 6).into()).into(),
        material: materials.add(ColorMaterial::from(Color::TURQUOISE)),
        transform: Transform::from_translation(Vec3::new(150., 0., 0.)),
        ..default()
    });
}