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"ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6" +"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f" diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..b4d264b --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,10 @@ +[package] +name = "gol" +version = "0.1.0" +authors = ["Moridius "] +edition = "2018" + +[dependencies] +png = "0.15.0" +rand = "0.6.5" +structopt = "0.3" diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..be97454 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,238 @@ +use png; +use rand::Rng; +use std::collections::HashSet; +use std::fmt; +use std::fs::File; +use std::io::prelude::*; +use std::io::{BufRead, BufReader, BufWriter}; +use std::path::Path; +use std::result::Result; +use structopt::StructOpt; + +/// Generates Game Of Life wallpapers. +#[derive(StructOpt, Debug)] +#[structopt(name = "gol")] +struct Opt { + /// Width of the wallpaper + #[structopt(name = "width")] + width: u32, + + /// Height of the wallpaper + #[structopt(name = "height")] + height: u32, + // /// bla + // #[structopt(name = "pixelsize")] + // pixel_size: u32, +} + +#[derive(Debug)] +pub enum FormatError { + ParserError, +} +impl fmt::Display for FormatError { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + match *self { + _ => f.write_str("Error while parsing."), + } + } +} + +impl std::error::Error for FormatError { + fn description(&self) -> &str { + match *self { + _ => "Error while parsing.", + } + } +} + +struct Field { + width: u32, + height: u32, + tmp_path: std::string::String, + data: HashSet<(u32, u32)>, +} + +impl Field { + fn with_size(width: u32, height: u32) -> Self { + //fn with_size(width: u32, height: u32, pixel_size: u32) -> Self { + Field { + width, + height, + tmp_path: "/tmp/wallpaper.gol".to_string(), + data: HashSet::new(), + } + } + + fn write_file(&self) { + let mut output = "".to_string(); + for coords in &self.data { + output.push_str(&format!("{}/{}\n", coords.0, coords.1)); + } + let mut file = File::create(&self.tmp_path).unwrap(); + write!(file, "{}", output).unwrap(); + } + + fn read_file(&mut self) -> Result<(), FormatError> { + let file = File::open(&self.tmp_path); + if file.is_err() { + return Err(FormatError::ParserError); + } + let file = BufReader::new(file.unwrap()); + self.data = HashSet::new(); + for line in file.lines() { + if line.is_err() { + return Err(FormatError::ParserError); + } + let line = line.unwrap(); + + let parts: Vec<_> = line.split('/').collect(); + let x = parts[0].parse(); + let y = parts[1].parse(); + if x.is_err() || y.is_err() { + return Err(FormatError::ParserError); + } + let x: u32 = x.unwrap(); + let y: u32 = y.unwrap(); + self.data.insert((x, y)); + } + Ok(()) + } + + fn write_image(&self, path: &str) { + let path = Path::new(&path); + let file = File::create(path).unwrap(); + let ref mut w = BufWriter::new(file); + + let mut encoder = png::Encoder::new(w, self.width, self.height); + encoder.set_color(png::ColorType::RGB); + encoder.set_depth(png::BitDepth::Eight); + let mut writer = encoder.write_header().unwrap(); + + let mut pixels = Vec::::new(); + for y in 0..self.height { + for x in 0..self.width { + if self.data.contains(&(x, y)) { + pixels.push(255); + pixels.push(0); + pixels.push(0); + } else { + pixels.push(0); + pixels.push(0); + pixels.push(0); + } + } + } + // println!("{:?}", pixels); + + //let data = [255, 0, 0, 0, 0, 0, 255, 0, 0, 0, 0, 0, 255, 0, 0, 0, 0, 0, 255, 0, 0, 0, 0, 0, 255, 0, 0, 0, 0, 0]; + writer.write_image_data(pixels.as_slice()).unwrap(); // Save + } + + fn fill_random(&mut self) { + let mut rng = rand::thread_rng(); + for x in 0..self.width { + for y in 0..self.height { + let r = rng.gen_range(0, 100); + if r < 15 { + self.data.insert((x, y)); + } + } + } + } + + fn count_neighbours(&self, x: u32, y: u32) -> u8 { + let mut neighbours = 0; + + if x > 0 && y > 0 { + neighbours += self.is_alive(x - 1, y - 1); + } + + if x > 0 { + neighbours += self.is_alive(x - 1, y); + neighbours += self.is_alive(x - 1, y + 1); + } + + if y > 0 { + neighbours += self.is_alive(x, y - 1); + neighbours += self.is_alive(x + 1, y - 1); + } + + neighbours += self.is_alive(x + 1, y); + neighbours += self.is_alive(x, y + 1); + neighbours += self.is_alive(x + 1, y + 1); + + //if x == 2 && (y == 0 || y == 2) { + //println!("{}/{}: {}", x, y, neighbours); + //} + neighbours + } + + fn is_alive(&self, x: u32, y: u32) -> u8 { + if self.data.contains(&(x, y)) { + return 1; + } else { + return 0; + } + } + + fn step(&mut self) { + let mut new_data = HashSet::new(); + for x in 0..self.width { + for y in 0..self.height { + let n = self.count_neighbours(x, y); + if self.is_alive(x, y) == 1 { + if n < 2 || n > 3 { + // die + new_data.remove(&(x, y)); + } else { + // stay alive + new_data.insert((x, y)); + } + } else if n == 3 { + // become alive + new_data.insert((x, y)); + } + } + } + self.data = new_data; + } + + /* + fn print(&self) { + print!("{}", "+"); + for _ in 0..self.width { + print!("{}", "-"); + } + println!("{}", "+"); + for y in 0..self.height { + print!("{}", "|"); + for x in 0..self.width { + if self.data.contains(&(x, y)) { + print!("{}", "O"); + } else { + print!("{}", " "); + } + } + println!("{}", "|"); + } + print!("{}", "+"); + for _ in 0..self.width { + print!("{}", "-"); + } + println!("{}", "+"); + } + */ +} + +fn main() { + let opt = Opt::from_args(); + let mut field = Field::with_size(opt.width, opt.height); //, opt.pixel_size); + if field.read_file().is_ok() { + field.step(); + } else { + field.fill_random(); + } + + field.write_file(); + field.write_image(&"/tmp/gol.png"); +}