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extern crate advent_of_code_2018;
use advent_of_code_2018::*;
use std::str::FromStr;
use std::error::Error;
use std::path::PathBuf;
use std::i32;
// cargo watch -cs "cargo run --release --bin day_10"
#[derive(Debug, Clone)]
struct Star {
x: i32,
y: i32,
dx: i32,
dy: i32
}
impl FromStr for Star {
type Err = Box<Error>;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let split = s
.split(|c: char| c != '-' && !c.is_numeric())
.filter(|s| !s.is_empty())
.map(|s| s.parse())
.collect::<Result<Vec<i32>, _>>()?;
Ok(Star {
x: split[0],
y: split[1],
dx: split[2],
dy: split[3]
})
}
}
fn main() -> Result<(), Box<Error>> {
let input = read_file(&PathBuf::from("inputs/10.txt"))?;
let mut stars = input.iter().map(|line| line.parse::<Star>().unwrap()).collect::<Vec<_>>();
//debug!(input);
//debug!(stars);
let screen_width = 80;
let screen_height = 80;
for seconds in 0..1000000 {
let min_x = stars.iter().map(|s| s.x).min().unwrap();
let max_x = stars.iter().map(|s| s.x).max().unwrap();
let min_y = stars.iter().map(|s| s.y).min().unwrap();
let max_y = stars.iter().map(|s| s.y).max().unwrap();
if max_x - min_x < screen_width && max_y - min_y < screen_height {
debug!(seconds);
for y in min_y..max_y+1 {
for x in min_x..max_x+1 {
let star_at_point = stars.iter().any(|s| s.x == x && s.y == y);
if star_at_point {
print!("#");
} else {
print!(" ");
}
}
println!();
}
println!();
println!();
}
for star in &mut stars {
star.x += star.dx;
star.y += star.dy;
}
}
Ok(())
}
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