Add Display implementation for Board

day22/src/day22.rs

@@ -3,7 +3,7 @@ use std::{
  env,
  fs,
  fmt,
- ops::{Add, Deref, DerefMut, RangeInclusive},
+ ops::{Add, Sub, Deref, DerefMut, RangeInclusive},
  process,
  str::FromStr,
 };
@@ -38,6 +38,8 @@ impl Vec3 {
  fn min(self, rhs: Self) -> Self { Self { x: self.x.min(rhs.x), y: self.y.min(rhs.y), z: self.z.min(rhs.z) } }
 
  fn max(self, rhs: Self) -> Self { Self { x: self.x.max(rhs.x), y: self.y.max(rhs.y), z: self.z.max(rhs.z) } }
+
+ fn signum(self) -> Self { Self { x: self.x.signum(), y: self.y.signum(), z: self.z.signum() } }
 }
 
 impl Add<Vec3> for Vec3 {
@@ -48,6 +50,14 @@ impl Add<Vec3> for Vec3 {
  }
 }
 
+impl Sub<Vec3> for Vec3 {
+ type Output = Self;
+
+ fn sub(self, rhs: Self) -> Self {
+ Self { x: self.x - rhs.x, y: self.y - rhs.y, z: self.z - rhs.z }
+ }
+}
+
 impl FromStr for Vec3 {
  type Err = String;
 
@@ -154,7 +164,24 @@ impl Board {
 
 impl fmt::Display for Board {
  fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
- todo!()
+ let min_bound = Vec3 { z: 0, ..self.min_bound() };
+ let max_bound = self.max_bound();
+ let width = (1 + max_bound.x - min_bound.x) as usize;
+ let height = (1 + max_bound.z - min_bound.z) as usize;
+ let mut lines: Vec<Vec<char>> = vec![vec![' '; width]; height];
+ lines[0] = vec!['-'; width];
+ for (i, brick) in self.bricks.iter().enumerate() {
+ let step = (brick.end - brick.start).signum();
+ let mut current = brick.start;
+ while current != (brick.end + step) {
+ lines[(current.z - min_bound.z) as usize][(current.x - min_bound.x) as usize] = (i + 'A' as usize) as u8 as char;
+ current = current + step;
+ }
+ }
+ for line in lines.into_iter().rev() {
+ writeln!(f, "{}", line.into_iter().collect::<String>())?;
+ }
+ Ok(())
  }
 }
 
@@ -181,5 +208,5 @@ fn main() {
  }
  let raw_input = fs::read_to_string(&args[1]).unwrap();
  let board: Board = raw_input.parse().unwrap();
- println!("{board:?}");
+ println!("{board}");
 }