use bevy::{prelude::*, window::WindowResolution};
const MAX_WIDTH: u16 = 401;
const MAX_HEIGHT: u16 = 401;
const MIN_WIDTH: u16 = 1;
const MIN_HEIGHT: u16 = 1;
const RESIZE_STEP: u16 = 4;
#[derive(Resource)]
struct Dimensions {
width: u16,
height: u16,
}
fn main() {
App::new()
.add_plugins(
DefaultPlugins.set(WindowPlugin {
primary_window: Some(Window {
resolution: WindowResolution::new(MAX_WIDTH as f32, MAX_HEIGHT as f32)
.with_scale_factor_override(1.0),
title: "Resizing".into(),
..default()
}),
..default()
}),
)
.insert_resource(Dimensions {
width: MAX_WIDTH,
height: MAX_HEIGHT,
})
.insert_resource(ContractingY)
.add_systems(Startup, (setup_3d, setup_2d))
.add_systems(Update, (change_window_size, sync_dimensions))
.run();
}
#[derive(Resource)]
enum Phase {
ContractingY,
ContractingX,
ExpandingY,
ExpandingX,
}
use Phase::*;
fn change_window_size(
mut windows: ResMut<Dimensions>,
mut phase: ResMut<Phase>,
mut first_complete: Local<bool>,
) {
if !*first_complete {
*first_complete = true;
return;
}
let height = windows.height;
let width = windows.width;
match *phase {
ContractingY => {
if height <= MIN_HEIGHT {
*phase = ContractingX;
} else {
windows.height -= RESIZE_STEP;
}
}
ContractingX => {
if width <= MIN_WIDTH {
*phase = ExpandingY;
} else {
windows.width -= RESIZE_STEP;
}
}
ExpandingY => {
if height >= MAX_HEIGHT {
*phase = ExpandingX;
} else {
windows.height += RESIZE_STEP;
}
}
ExpandingX => {
if width >= MAX_WIDTH {
*phase = ContractingY;
} else {
windows.width += RESIZE_STEP;
}
}
}
}
fn sync_dimensions(dim: Res<Dimensions>, mut windows: Query<&mut Window>) {
if dim.is_changed() {
let mut window = windows.single_mut();
window.resolution.set(dim.width as f32, dim.height as f32);
}
}
fn setup_3d(
mut commands: Commands,
mut meshes: ResMut<Assets<Mesh>>,
mut materials: ResMut<Assets<StandardMaterial>>,
) {
commands.spawn(PbrBundle {
mesh: meshes.add(Plane3d::default().mesh().size(5.0, 5.0)),
material: materials.add(Color::srgb(0.3, 0.5, 0.3)),
..default()
});
commands.spawn(PbrBundle {
mesh: meshes.add(Cuboid::default()),
material: materials.add(Color::srgb(0.8, 0.7, 0.6)),
transform: Transform::from_xyz(0.0, 0.5, 0.0),
..default()
});
commands.spawn(PointLightBundle {
point_light: PointLight {
shadows_enabled: true,
..default()
},
transform: Transform::from_xyz(4.0, 8.0, 4.0),
..default()
});
commands.spawn(Camera3dBundle {
transform: Transform::from_xyz(-2.0, 2.5, 5.0).looking_at(Vec3::ZERO, Vec3::Y),
..default()
});
}
fn setup_2d(mut commands: Commands) {
commands.spawn(Camera2dBundle {
camera: Camera {
order: 1,
clear_color: ClearColorConfig::None,
..default()
},
..default()
});
commands.spawn(SpriteBundle {
sprite: Sprite {
color: Color::srgb(0.25, 0.25, 0.75),
custom_size: Some(Vec2::new(50.0, 50.0)),
..default()
},
..default()
});
}