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|
use bevy::prelude::*;
use std::fs::File;
use std::io::{BufRead, BufReader};
fn main() {
App::build()
.add_resource(WindowDescriptor {
title: "Advent of Code".to_string(),
width: 1920,
height: 1080,
..Default::default()
})
.add_resource(ClearColor(Color::rgb(0., 0., 0.)))
.add_startup_system(setup_camera.system())
.add_startup_system(read_input_file.system())
.add_startup_stage("search")
.add_startup_system_to_stage("search", find_unoccupied_seat.system())
.add_startup_stage("metadata")
.add_startup_system_to_stage("metadata", add_seat_ids.system())
.add_startup_system_to_stage("metadata", add_seat_sprites.system())
.add_startup_stage("report")
.add_startup_system_to_stage("report", print_highest_seat_id.system())
.add_startup_system_to_stage("report", print_my_seat_id.system())
.add_plugins(DefaultPlugins)
.run();
}
fn setup_camera(mut commands: Commands, mut materials: ResMut<Assets<ColorMaterial>>) {
commands.spawn(Camera2dComponents {
transform: Transform::from_translation(Vec3::new(80. / 2., 1280. / 2., 0.)),
..Default::default()
});
commands.insert_resource(Materials {
my_seat_material: materials.add(Color::rgb(0., 0., 255.).into()),
seat_material: materials.add(Color::rgb(0., 255., 0.).into()),
});
}
struct Materials {
my_seat_material: Handle<ColorMaterial>,
seat_material: Handle<ColorMaterial>,
}
#[derive(PartialEq, Eq)]
struct Position {
x: u32,
y: u32,
}
struct SeatId(u32);
struct MySeat;
fn read_input_file(mut commands: Commands) {
let f = File::open("./inputs/day_5.txt").unwrap();
for line in BufReader::new(f).lines() {
let mut max_y = 128;
let mut min_y = 0;
let mut max_x = 8;
let mut min_x = 0;
for c in line.unwrap().trim().chars() {
let mid_x = (min_x + max_x) / 2;
let mid_y = (min_y + max_y) / 2;
match c {
'F' => {
max_y = mid_y;
}
'B' => {
min_y = mid_y;
}
'L' => {
max_x = mid_x;
}
'R' => {
min_x = mid_x;
}
_ => panic!("Unexpected character {}", c),
}
}
assert_eq!(max_y - min_y, 1);
assert_eq!(max_x - min_x, 1);
commands.spawn((Position { x: min_x, y: min_y },));
}
}
fn find_unoccupied_seat(mut commands: Commands, seats: Query<&Position>) {
for y in 1..127 {
for x in 0..8 {
let potential_position = Position { x, y };
let required_left = if x == 0 {
Position { x: 7, y: y - 1 }
} else {
Position { x: x - 1, y }
};
let required_right = if x == 7 {
Position { x: 0, y: y + 1 }
} else {
Position { x: x + 1, y }
};
let required_surrounds = [required_left, required_right];
if !seats.iter().any(|p| p == &potential_position) {
if required_surrounds
.iter()
.all(|required| seats.iter().any(|p| p == required))
{
commands.spawn((MySeat, potential_position));
}
}
}
}
}
fn add_seat_ids(mut commands: Commands, seats: Query<(Entity, &Position)>) {
for (entity, position) in seats.iter() {
let seat_id = position.y * 8 + position.x;
commands.insert_one(entity, SeatId(seat_id));
}
}
fn add_seat_sprites(
mut commands: Commands,
materials: Res<Materials>,
seats: Query<(Entity, &Position, Option<&MySeat>)>,
) {
for (entity, position, my_seat) in seats.iter() {
commands.insert(
entity,
SpriteComponents {
sprite: Sprite::new(Vec2::new(10., 10.)),
material: if my_seat.is_some() {
materials.my_seat_material.clone()
} else {
materials.seat_material.clone()
},
transform: Transform::from_translation(Vec3::new(
position.x as f32 * 10.,
position.y as f32 * 10.,
0.,
)),
..Default::default()
},
);
}
}
fn print_highest_seat_id(seats: Query<&SeatId>) {
let max = seats.iter().map(|s| s.0).max();
println!("Max seat id: {:?}", max);
}
fn print_my_seat_id(seats: Query<With<MySeat, &SeatId>>) {
for seat_id in seats.iter() {
println!("My seat id: {}", seat_id.0);
}
}
|
