feat: implemented file to graph parsing and dijkstra
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GPG Key ID:
2B4F402172791BAF
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@ -2,6 +2,245 @@
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# It is not intended for manual editing.
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dependencies = [
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"proc-macro2",
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"quote",
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"windows_aarch64_msvc",
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"windows_i686_msvc",
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"windows_x86_64_gnu",
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"windows_x86_64_gnullvm",
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"windows_x86_64_msvc",
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]
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name = "windows_x86_64_gnullvm"
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[[package]]
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[[package]]
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name = "zauberschule"
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version = "0.1.0"
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dependencies = [
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"anyhow",
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"clap",
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"slab",
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]
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@ -6,3 +6,6 @@ edition = "2021"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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anyhow = "1.0"
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clap = { version = "4.4.2", features = ["derive"] }
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slab = "0.4.9"
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@ -0,0 +1,207 @@
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use anyhow::{Error, Result};
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use slab::Slab;
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use std::path::Path;
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#[derive(Debug)]
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struct Edge {
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node: usize,
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gravity: usize,
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}
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#[derive(Debug)]
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struct Node {
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edges: Slab<Edge>,
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}
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#[derive(Debug)]
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pub struct Graph {
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nodes: Slab<Node>,
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start: usize,
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end: usize,
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}
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#[derive(Debug)]
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enum MapNode {
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Wall,
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Floor(usize),
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Unknown(char),
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}
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#[derive(Debug, Clone)]
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struct DijkstraNode {
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parent: usize,
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distance: usize,
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}
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impl Edge {
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fn new(id: usize, gravity: usize) -> Self {
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Self { node: id, gravity }
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}
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}
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impl Node {
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fn new() -> Self {
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Self { edges: Slab::new() }
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}
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}
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impl DijkstraNode {
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fn new() -> Self {
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Self {
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parent: 0,
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distance: 0,
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}
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}
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}
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impl Graph {
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fn default() -> Self {
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Self {
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nodes: Slab::new(),
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start: 0,
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end: 0,
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}
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}
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pub fn new(path: &Path) -> Result<Self> {
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let mut graph = Self::default();
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let file_content = std::fs::read_to_string(path)?;
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// Split the raw content into two vectors of vectors of MapNodes
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// Each vector represents a map layer that's split into rows.
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let maps = file_content
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.split_once('\n')
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.unwrap()
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.1
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.split("\n\n")
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.map(|block| {
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block
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.lines()
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.map(|line| {
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line.chars()
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.map(|c| match c {
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'#' => MapNode::Wall,
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'.' | 'A' | 'B' => {
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let id = graph.nodes.insert(Node::new());
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if c == 'A' {
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graph.start = id;
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}
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if c == 'B' {
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graph.end = id;
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}
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MapNode::Floor(id)
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}
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c => MapNode::Unknown(c),
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})
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.collect()
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})
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.collect()
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})
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.collect::<Vec<Vec<Vec<MapNode>>>>();
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// connect nodes
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for (z, map) in maps.iter().enumerate() {
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print!("\n");
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for (y, row) in map.iter().enumerate() {
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print!("\n");
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for (x, map_node) in row.iter().enumerate() {
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match map_node {
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MapNode::Wall => print!("--- "),
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MapNode::Floor(id) => {
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let node = graph.nodes.get_mut(id.to_owned()).unwrap();
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print!("{:03} ", id);
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if let MapNode::Floor(i) = row[x - 1] {
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node.edges.insert(Edge::new(i, 1));
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}
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if let MapNode::Floor(i) = row[x + 1] {
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node.edges.insert(Edge::new(i, 1));
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}
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if let MapNode::Floor(i) = maps[z][y - 1][x] {
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node.edges.insert(Edge::new(i, 1));
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}
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if let MapNode::Floor(i) = maps[z][y + 1][x] {
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node.edges.insert(Edge::new(i, 1));
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}
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if let MapNode::Floor(i) = maps[(z + 1) % 2][y][x] {
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node.edges.insert(Edge::new(i, 3));
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}
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}
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MapNode::Unknown(c) => {
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return Err(Error::msg(format!("Unknown character: '{c}'")))
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}
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}
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}
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}
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}
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print!("\n");
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Ok(graph)
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}
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pub fn dijkstra(&self) -> Result<Vec<usize>> {
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let mut visited = Vec::new();
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let mut distances = vec![DijkstraNode::new(); self.nodes.len()];
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let mut queue = Vec::new();
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queue.push(self.start);
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loop {
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let id = queue.pop().unwrap();
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// println!("{id}");
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if id == self.end {
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break;
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}
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let node = self.nodes.get(id).unwrap();
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visited.push(id);
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for (_, edge) in node.edges.iter() {
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if visited.contains(&edge.node) {
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continue;
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}
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if distances[edge.node].distance == 0
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|| distances[id].distance + edge.gravity < distances[edge.node].distance
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{
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if distances[edge.node].distance == 0 {
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queue.push(edge.node);
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}
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distances[edge.node].parent = id;
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distances[edge.node].distance = distances[id].distance + edge.gravity;
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// println!(" {}: {}", edge.node, distances[edge.node].distance);
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}
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}
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queue.sort_unstable_by(|a, b| {
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distances[b.to_owned()]
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.distance
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.cmp(&distances[a.to_owned()].distance)
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});
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// println!(
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// " {:?}",
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// queue
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// .iter()
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// .map(|id| (id, distances[id.to_owned()].distance))
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// .collect::<Vec<(&usize, usize)>>()
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// );
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}
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let mut id = self.end;
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let mut path = Vec::new();
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while id != self.start {
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path.push(id);
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id = distances[id].parent;
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}
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path.push(self.start);
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path.reverse();
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||||
|
||||
Ok(path)
|
||||
}
|
||||
}
|
||||
|
|
@ -1,3 +1,27 @@
|
|||
fn main() {
|
||||
println!("Hello, world!");
|
||||
mod graph;
|
||||
|
||||
use anyhow::Result;
|
||||
use clap::Parser;
|
||||
use graph::Graph;
|
||||
use std::path::Path;
|
||||
|
||||
/// BWINF 42.1
|
||||
/// <Name Censored>
|
||||
/// Aufgabe 3: Zauberschule
|
||||
#[derive(Parser, Debug)]
|
||||
#[command(author, version, about, long_about = None)]
|
||||
struct Args {
|
||||
/// The file containing the two maps
|
||||
file: String,
|
||||
}
|
||||
|
||||
fn main() -> Result<()> {
|
||||
println!("BWINF 42.1 - <Name Censored> - Aufgabe 3: Zauberschule");
|
||||
let args = Args::parse();
|
||||
|
||||
let graph = Graph::new(Path::new(&args.file))?;
|
||||
let path = graph.dijkstra()?;
|
||||
println!("Path: {:?}", path);
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue