//! A simple scene to demonstrate picking events use bevy::{color::palettes::css::*, prelude::*}; fn main() { let mut app = App::new(); app.add_plugins(DefaultPlugins); app.add_systems(Startup, setup); app.run(); } /// set up a simple 3D scene fn setup( mut commands: Commands, mut meshes: ResMut>, mut materials: ResMut>, ) { commands .spawn(( TextBundle { text: Text::from_section("Click Me to get a box", TextStyle::default()), style: Style { position_type: PositionType::Absolute, top: Val::Percent(12.0), left: Val::Percent(12.0), ..default() }, ..Default::default() }, Pickable::default(), )) .observe( |_click: Trigger>, mut commands: Commands, mut meshes: ResMut>, mut materials: ResMut>, mut num: Local| { commands.spawn(PbrBundle { mesh: meshes.add(Cuboid::new(1.0, 1.0, 1.0)), material: materials.add(Color::srgb_u8(124, 144, 255)), transform: Transform::from_xyz(0.0, 0.5 + 1.1 * *num as f32, 0.0), ..default() }); *num += 1; }, ) .observe(|evt: Trigger>, mut texts: Query<&mut Text>| { let mut text = texts.get_mut(evt.entity()).unwrap(); let first = text.sections.first_mut().unwrap(); first.style.color = WHITE.into(); }) .observe(|evt: Trigger>, mut texts: Query<&mut Text>| { let mut text = texts.get_mut(evt.entity()).unwrap(); let first = text.sections.first_mut().unwrap(); first.style.color = BLUE.into(); }); // circular base commands .spawn(( PbrBundle { mesh: meshes.add(Circle::new(4.0)), material: materials.add(Color::WHITE), transform: Transform::from_rotation(Quat::from_rotation_x( -std::f32::consts::FRAC_PI_2, )), ..default() }, Pickable::default(), )) .observe(|click: Trigger>| { let click = click.event(); println!("{click:?}"); }); // light commands.spawn(( PointLight { shadows_enabled: true, ..default() }, Transform::from_xyz(4.0, 8.0, 4.0), )); // camera commands.spawn(Camera3dBundle { transform: Transform::from_xyz(-2.5, 4.5, 9.0).looking_at(Vec3::ZERO, Vec3::Y), ..default() }); }