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Day 18 visualization

This commit is contained in:
Shadowfacts 2023-12-18 16:55:28 -05:00
parent 2aca99aa2b
commit 40df81277c
3 changed files with 382 additions and 5 deletions
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347
Cargo.lock generated
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@ -2,6 +2,12 @@
# It is not intended for manual editing.
version = 3
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@ -15,16 +21,188 @@ dependencies = [
name = "aoc23"
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"image",
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"regex",
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@ -34,12 +212,128 @@ dependencies = [
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@ -68,3 +362,56 @@ name = "regex-syntax"
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1
Cargo.toml
View File

@ -8,3 +8,4 @@ edition = "2021"
[dependencies]
regex = "1.10"
itertools = "0.12"
image = "0.24.7"

39
src/day18.rs
View File

@ -46,11 +46,12 @@ pub fn run() {
let instructions = parse_instructions(input);
let path = run_instructions(&instructions);
dbg!(count_enclosed2(&path));
dbg!(path_bounds(&path));
dbg!(count_enclosed2(&path, true));
// let instructions2 = parse_instructions_part2(input);
// let path2 = run_instructions(&instructions2);
// dbg!(count_enclosed2(&path2));
// dbg!(count_enclosed2(&path2, false));
}
fn parse_instructions(s: &str) -> Vec<Instruction> {
@ -280,16 +281,24 @@ fn path_bounds(path: &[Segment]) -> (isize, isize, isize, isize) {
(min_x, max_x, min_y, max_y)
}
fn count_enclosed2(path: &[Segment]) -> usize {
fn count_enclosed2(path: &[Segment], visualize: bool) -> usize {
// println!("initial segments: {}", path.len());
// print_path(path);
let mut count = 0;
let mut path = path.to_vec();
let orig_bounds = path_bounds(&path);
dbg!(orig_bounds);
let mut last_segment_count = None;
let mut iteration = 0;
loop {
if visualize {
write_visualization(&path, orig_bounds, iteration);
}
iteration += 1;
// println!("--------------");
// print_path(&path);
if let Some(c) = last_segment_count {
@ -458,7 +467,7 @@ fn count_enclosed2(path: &[Segment]) -> usize {
}
}
// dbg!(count);
dbg!(iteration);
count as usize
}
@ -578,6 +587,26 @@ fn print_path(path: &[Segment]) {
println!();
}
fn write_visualization(
path: &[Segment],
(min_x, max_x, min_y, max_y): (isize, isize, isize, isize),
iteration: u32,
) {
let mut buf = image::ImageBuffer::new((1 + max_x - min_x) as u32, (1 + max_y - min_y) as u32);
for (x, y, pixel) in buf.enumerate_pixels_mut() {
let world_x = min_x + x as isize;
let world_y = min_y + y as isize;
if path.iter().any(|s| s.contains((world_x, world_y))) {
*pixel = image::Rgb([0u8, 0, 0]);
} else {
*pixel = image::Rgb([255, 255, 255]);
}
}
buf.save(format!("vis/{}.png", iteration)).unwrap();
}
#[cfg(test)]
mod tests {
use super::*;
@ -641,6 +670,6 @@ D 2 (#d2c081)
"#,
);
let path = run_instructions(&instructions);
assert_eq!(count_enclosed2(&path), 62);
assert_eq!(count_enclosed2(&path, false), 62);
}
}