use std::f32::consts::{PI, TAU};
use bevy::prelude::*;
fn main() {
App::new()
.add_plugins(DefaultPlugins)
.init_gizmo_group::<MyRoundGizmos>()
.add_systems(Startup, setup)
.add_systems(Update, (draw_example_collection, update_config))
.run();
}
#[derive(Default, Reflect, GizmoConfigGroup)]
struct MyRoundGizmos {}
fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
commands.spawn(Camera2dBundle::default());
commands.spawn(TextBundle::from_section(
"Hold 'Left' or 'Right' to change the line width of straight gizmos\n\
Hold 'Up' or 'Down' to change the line width of round gizmos\n\
Press '1' or '2' to toggle the visibility of straight gizmos or round gizmos",
TextStyle {
font: asset_server.load("fonts/FiraMono-Medium.ttf"),
font_size: 24.,
color: Color::WHITE,
},
));
}
fn draw_example_collection(
mut gizmos: Gizmos,
mut my_gizmos: Gizmos<MyRoundGizmos>,
time: Res<Time>,
) {
let sin = time.elapsed_seconds().sin() * 50.;
gizmos.line_2d(Vec2::Y * -sin, Vec2::splat(-80.), Color::RED);
gizmos.ray_2d(Vec2::Y * sin, Vec2::splat(80.), Color::GREEN);
gizmos.linestrip_gradient_2d([
(Vec2::Y * 300., Color::BLUE),
(Vec2::new(-255., -155.), Color::RED),
(Vec2::new(255., -155.), Color::GREEN),
(Vec2::Y * 300., Color::BLUE),
]);
gizmos.rect_2d(
Vec2::ZERO,
time.elapsed_seconds() / 3.,
Vec2::splat(300.),
Color::BLACK,
);
my_gizmos.circle_2d(Vec2::ZERO, 120., Color::BLACK);
my_gizmos.ellipse_2d(
Vec2::ZERO,
time.elapsed_seconds() % TAU,
Vec2::new(100., 200.),
Color::YELLOW_GREEN,
);
my_gizmos
.circle_2d(Vec2::ZERO, 300., Color::NAVY)
.segments(64);
my_gizmos.arc_2d(Vec2::ZERO, sin / 10., PI / 2., 350., Color::ORANGE_RED);
gizmos.arrow_2d(
Vec2::ZERO,
Vec2::from_angle(sin / -10. + PI / 2.) * 50.,
Color::YELLOW,
);
}
fn update_config(
mut config_store: ResMut<GizmoConfigStore>,
keyboard: Res<ButtonInput<KeyCode>>,
time: Res<Time>,
) {
let (config, _) = config_store.config_mut::<DefaultGizmoConfigGroup>();
if keyboard.pressed(KeyCode::ArrowRight) {
config.line_width += 5. * time.delta_seconds();
config.line_width = config.line_width.clamp(0., 50.);
}
if keyboard.pressed(KeyCode::ArrowLeft) {
config.line_width -= 5. * time.delta_seconds();
config.line_width = config.line_width.clamp(0., 50.);
}
if keyboard.just_pressed(KeyCode::Digit1) {
config.enabled ^= true;
}
let (my_config, _) = config_store.config_mut::<MyRoundGizmos>();
if keyboard.pressed(KeyCode::ArrowUp) {
my_config.line_width += 5. * time.delta_seconds();
my_config.line_width = my_config.line_width.clamp(0., 50.);
}
if keyboard.pressed(KeyCode::ArrowDown) {
my_config.line_width -= 5. * time.delta_seconds();
my_config.line_width = my_config.line_width.clamp(0., 50.);
}
if keyboard.just_pressed(KeyCode::Digit2) {
my_config.enabled ^= true;
}
}