use bevy::prelude::*;

fn main() {
    App::build()
        .insert_resource(Msaa { samples: 4 })
        .add_plugins(DefaultPlugins)
        .add_startup_system(setup.system())
        .run();
}

/// set up a simple 3D scene
fn setup(
    commands: &mut Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<StandardMaterial>>,
) {
    // set up the camera
    let mut camera = OrthographicCameraBundle::new_3d();
    camera.orthographic_projection.scale = 3.0;
    camera.transform = Transform::from_xyz(5.0, 5.0, 5.0).looking_at(Vec3::zero(), Vec3::unit_y());

    // add entities to the world
    commands
        // plane
        .spawn(PbrBundle {
            mesh: meshes.add(Mesh::from(shape::Plane { size: 5.0 })),
            material: materials.add(Color::rgb(0.3, 0.5, 0.3).into()),
            ..Default::default()
        })
        // cubes
        .spawn(PbrBundle {
            mesh: meshes.add(Mesh::from(shape::Cube { size: 1.0 })),
            material: materials.add(Color::rgb(0.8, 0.7, 0.6).into()),
            transform: Transform::from_xyz(1.5, 0.5, 1.5),
            ..Default::default()
        })
        .spawn(PbrBundle {
            mesh: meshes.add(Mesh::from(shape::Cube { size: 1.0 })),
            material: materials.add(Color::rgb(0.8, 0.7, 0.6).into()),
            transform: Transform::from_xyz(1.5, 0.5, -1.5),
            ..Default::default()
        })
        .spawn(PbrBundle {
            mesh: meshes.add(Mesh::from(shape::Cube { size: 1.0 })),
            material: materials.add(Color::rgb(0.8, 0.7, 0.6).into()),
            transform: Transform::from_xyz(-1.5, 0.5, 1.5),
            ..Default::default()
        })
        .spawn(PbrBundle {
            mesh: meshes.add(Mesh::from(shape::Cube { size: 1.0 })),
            material: materials.add(Color::rgb(0.8, 0.7, 0.6).into()),
            transform: Transform::from_xyz(-1.5, 0.5, -1.5),
            ..Default::default()
        })
        // light
        .spawn(LightBundle {
            transform: Transform::from_xyz(3.0, 8.0, 5.0),
            ..Default::default()
        })
        // camera
        .spawn(camera);
}