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use std::time::Duration;
use bevy::{color::palettes, image::TextureFormatPixelInfo, prelude::*};
use bevy_easings::{Ease, *};
use rand::RngExt;
fn main() -> Result<(), Box<dyn std::error::Error>> {
App::default()
.add_plugins(DefaultPlugins)
.add_plugins(bevy_easings::EasingsPlugin::default())
.add_systems(Startup, setup)
.add_systems(
Update,
(
spawn_logo_points,
(switch_menu, despawn_menu).chain(),
update_text,
),
)
.run();
Ok(())
}
fn switch_menu(
mut commands: Commands,
menu: Query<(Entity, &MenuItem, Option<&ToDespawn>)>,
mut timer: Local<Option<Timer>>,
time: Res<Time>,
) {
if !timer
.as_mut()
.map(|timer| timer.tick(time.delta()).just_finished())
.unwrap_or(true)
{
return;
}
if menu.is_empty() {
spawn_menu(&mut commands);
*timer = Some(Timer::from_seconds(5.0, TimerMode::Once));
} else {
for (entity, item, _) in menu.iter() {
match item {
MenuItem::Root => {
commands.entity(entity).insert((
Node {
width: Val::Percent(100.0),
height: Val::Percent(100.0),
top: Val::Percent(0.0),
align_items: AlignItems::Center,
justify_content: JustifyContent::Center,
..default()
}
.ease_to(
Node {
width: Val::Percent(100.0),
height: Val::Percent(100.0),
top: Val::Percent(100.0),
align_items: AlignItems::Center,
justify_content: JustifyContent::Center,
..default()
},
bevy_easings::EaseFunction::QuadraticIn,
EasingType::Once {
duration: Duration::from_secs(1),
},
)
.delay(Duration::from_secs_f32(0.8)),
ToDespawn,
));
}
MenuItem::Button(i) => {
commands.entity(entity).insert(
Node {
width: Val::Px(250.0),
height: Val::Px(65.0),
top: Val::Px(30.0 + *i as f32 * 70.0),
border: UiRect::all(Val::Px(0.0)),
position_type: PositionType::Absolute,
align_items: AlignItems::Center,
justify_content: JustifyContent::Center,
..default()
}
.ease_to(
Node {
width: Val::Px(0.0),
height: Val::Px(0.0),
border: UiRect::all(Val::Px(5.0)),
..default()
},
bevy_easings::EaseFunction::QuadraticOut,
EasingType::Once {
duration: Duration::from_secs_f32(1.2),
},
)
.delay(Duration::from_secs_f32(0.2 * (5 - i) as f32)),
);
}
_ => (),
}
}
*timer = Some(Timer::from_seconds(3.0, TimerMode::Once));
}
}
#[derive(Component)]
struct ToDespawn;
fn despawn_menu(
mut commands: Commands,
menu: Query<&MenuItem, With<ToDespawn>>,
mut finished_easing: RemovedComponents<EasingComponent<Node>>,
) {
for finished in finished_easing.read() {
if menu.contains(finished) {
commands.entity(finished).despawn();
}
}
}
#[derive(Component)]
enum MenuItem {
Root,
Panel,
Button(u32),
}
#[derive(Resource)]
struct Logo(Handle<Image>);
fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
commands.insert_resource(Logo(asset_server.load("vleue.png")));
commands.spawn(Camera2d);
}
fn spawn_menu(commands: &mut Commands) {
let border_diff = 3.0;
commands
.spawn((
Node {
width: Val::Percent(100.0),
height: Val::Percent(100.0),
top: Val::Percent(-100.0),
align_items: AlignItems::Center,
justify_content: JustifyContent::Center,
..default()
}
.ease_to(
Node {
width: Val::Percent(100.0),
height: Val::Percent(100.0),
top: Val::Percent(0.0),
align_items: AlignItems::Center,
justify_content: JustifyContent::Center,
..default()
},
bevy_easings::EaseFunction::QuadraticOut,
EasingType::Once {
duration: Duration::from_secs(1),
},
)
.with_original_value(),
MenuItem::Root,
))
.with_children(|parent| {
parent
.spawn((
BackgroundColor(palettes::tailwind::EMERALD_400.into()),
BorderColor::all(palettes::tailwind::EMERALD_100),
Node {
flex_direction: FlexDirection::Column,
align_items: AlignItems::Center,
border: UiRect::all(Val::Px(5.0)),
width: Val::Px(500.0),
height: Val::Px(400.0),
border_radius: BorderRadius::all(Val::Percent(5.0)),
..default()
}
.ease_to(
Node {
flex_direction: FlexDirection::Column,
align_items: AlignItems::Center,
border: UiRect::all(Val::Px(5.0 + border_diff)),
width: Val::Px(500.0 + border_diff * 2.0),
height: Val::Px(400.0 + border_diff * 2.0),
..default()
},
bevy_easings::EaseFunction::QuadraticInOut,
EasingType::PingPong {
duration: Duration::from_secs_f32(0.2),
pause: None,
},
)
.with_original_value(),
MenuItem::Panel,
))
.with_children(|parent| {
for i in 0..5 {
parent
.spawn((
Button,
BackgroundColor(palettes::tailwind::INDIGO_800.into()),
BorderColor::all(palettes::tailwind::INDIGO_400),
Node {
width: Val::Px(0.0),
height: Val::Px(0.0),
top: Val::Px(30.0 + i as f32 * 70.0),
border: UiRect::all(Val::Px(0.0)),
position_type: PositionType::Absolute,
align_items: AlignItems::Center,
justify_content: JustifyContent::Center,
border_radius: BorderRadius::all(Val::Percent(10.0)),
..default()
},
Node {
width: Val::Px(0.0),
height: Val::Px(0.0),
top: Val::Px(30.0 + i as f32 * 70.0),
border: UiRect::all(Val::Px(0.0)),
position_type: PositionType::Absolute,
align_items: AlignItems::Center,
justify_content: JustifyContent::Center,
..default()
}
.ease_to(
Node {
width: Val::Px(250.0),
height: Val::Px(65.0),
border: UiRect::all(Val::Px(5.0)),
..default()
},
bevy_easings::EaseFunction::BounceOut,
EasingType::Once {
duration: Duration::from_secs_f32(1.2),
},
)
.delay(Duration::from_secs_f32(0.2 * i as f32)),
MenuItem::Button(i),
))
.with_children(|p| {
p.spawn((
Text::new(match i {
0 => "New Game",
1 => "Load Game",
2 => "Options",
3 => "Credits",
4 => "Quit",
_ => unreachable!(),
}),
TextFont {
font_size: FontSize::Px(0.0),
..default()
},
));
});
}
});
});
}
fn spawn_logo_points(
logo: Res<Logo>,
images: Res<Assets<Image>>,
window: Query<&Window>,
mut commands: Commands,
mut done: Local<bool>,
) {
if *done {
return;
}
let Some(image) = images.get(&logo.0) else {
return;
};
let resolution = 6;
let Ok(window) = window.single() else {
return;
};
let window_size = window.size();
for i in (0..image.width()).step_by(resolution) {
for j in (0..image.height()).step_by(resolution) {
let pixel_size = image.texture_descriptor.format.pixel_size().unwrap();
let value = image
.data
.as_ref()
.unwrap()
.chunks(pixel_size)
.nth((j * image.width() + i) as usize)
.unwrap();
// ignore transparent pixels
if value[3] == 0 {
continue;
}
commands.spawn((
Node {
width: Val::Px(resolution as f32),
height: Val::Px(resolution as f32),
left: Val::Px(rand::rng().random_range(0.0..window_size.x)),
top: Val::Px(rand::rng().random_range(0.0..window_size.y)),
position_type: PositionType::Absolute,
border_radius: BorderRadius::MAX,
..Default::default()
}
.ease_to(
Node {
width: Val::Px(resolution as f32),
height: Val::Px(resolution as f32),
left: Val::Px(i as f32 + 10.0),
top: Val::Px(j as f32 + window_size.y / 2.0 - image.height() as f32 / 2.0),
position_type: PositionType::Absolute,
..Default::default()
},
bevy_easings::EaseFunction::QuadraticInOut,
EasingType::PingPong {
duration: std::time::Duration::from_secs_f32(2.5),
pause: Some(std::time::Duration::from_secs(1)),
},
)
.with_original_value(),
BackgroundColor(Color::Oklaba(Oklaba::new(
0.5,
rand::rng().random_range(-1.5..1.5),
rand::rng().random_range(-1.5..1.5),
1.0,
)))
.ease_to(
BackgroundColor(Color::Srgba(Srgba::new(
value[0] as f32 / u8::MAX as f32,
value[1] as f32 / u8::MAX as f32,
value[2] as f32 / u8::MAX as f32,
1.0,
))),
bevy_easings::EaseFunction::QuadraticOut,
EasingType::PingPong {
duration: std::time::Duration::from_secs_f32(2.5),
pause: Some(std::time::Duration::from_secs(1)),
},
),
));
}
}
*done = true;
}
// Trick for now as Bevy doesn't support dynamic font size
fn update_text(mut text: Query<(&mut TextFont, &ChildOf)>, nodes: Query<&ComputedNode>) {
for (mut text, parent) in text.iter_mut() {
let node = nodes.get(parent.parent()).unwrap();
text.font_size = FontSize::Px((node.size().y / 8.0).floor() * 2.0);
}
}