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"servicepoint-life" +version = "0.1.0" +edition = "2021" + +[dependencies] +clap = { version = "4.5.4", features = ["derive"] } +rand = "0.9.0-alpha.1" +env_logger = "0.11.3" +servicepoint2 = "0.4.1" +crossterm = "0.27.0" +log = "0.4.21" diff --git a/README.md b/README.md new file mode 100644 index 0000000..b669a8c --- /dev/null +++ b/README.md @@ -0,0 +1,3 @@ +# servicepoint-life + +More fully featured game of life for the servicepoint display based on the example in the repo. diff --git a/shell.nix b/shell.nix new file mode 100644 index 0000000..0bf2bcc --- /dev/null +++ b/shell.nix @@ -0,0 +1,4 @@ +{ pkgs ? import {} }: + pkgs.mkShell { + nativeBuildInputs = with pkgs.buildPackages; [ rustup cargo pkg-config xe lzma ]; +} diff --git a/src/app.rs b/src/app.rs new file mode 100644 index 0000000..7a3a395 --- /dev/null +++ b/src/app.rs @@ -0,0 +1,167 @@ +use std::time::Duration; + +use crossterm::event; +use crossterm::event::KeyCode::Modifier; +use crossterm::event::{Event, KeyCode, KeyEvent, KeyEventKind}; +use log::{debug, info, warn}; +use rand::{distributions, Rng}; +use servicepoint2::Command::CharBrightness; +use servicepoint2::{ + ByteGrid, Command, CompressionCode, Connection, Origin, PixelGrid, TILE_HEIGHT, TILE_WIDTH, +}; + +use crate::Cli; + +pub(crate) struct App { + connection: Connection, + probability: f64, + field: PixelGrid, +} + +impl App { + #[must_use] + pub fn new(connection: Connection, cli: &Cli) -> Self { + Self { + connection, + probability: cli.probability, + field: Self::make_random_field(cli.probability), + } + } + + pub fn step(&mut self) -> bool { + self.send_image(); + self.change_brightness(); + self.field = self.game_iteration(); + + self.handle_events() + } + + fn game_iteration(&self) -> PixelGrid { + let mut next = self.field.clone(); + for x in 0..self.field.width() { + for y in 0..self.field.height() { + let old_state = self.field.get(x, y); + let neighbors = self.count_neighbors(x, y); + + let new_state = + matches!((old_state, neighbors), (true, 2) | (true, 3) | (false, 3)); + next.set(x, y, new_state); + } + } + next + } + + fn send_image(&self) { + let command = Command::BitmapLinearWin( + Origin(0, 0), + self.field.clone(), + CompressionCode::Uncompressed, + ); + + self.connection + .send(command.into()) + .expect("could not send"); + } + + fn count_neighbors(&self, x: usize, y: usize) -> u8 { + let x = x as i32; + let y = y as i32; + let mut count = 0; + for nx in x - 1..=x + 1 { + for ny in y - 1..=y + 1 { + if nx == x && ny == y { + continue; // the cell itself does not count + } + + if nx < 0 + || ny < 0 + || nx >= self.field.width() as i32 + || ny >= self.field.height() as i32 + { + continue; // pixels outside the grid do not count + } + + if !self.field.get(nx as usize, ny as usize) { + continue; // dead cells do not count + } + + count += 1; + } + } + + count + } + + fn make_random_field(probability: f64) -> PixelGrid { + let mut field = PixelGrid::max_sized(); + let mut rng = rand::thread_rng(); + let d = distributions::Bernoulli::new(probability).unwrap(); + for x in 0..field.width() { + for y in 0..field.height() { + field.set(x, y, rng.sample(d)); + } + } + field + } + + fn handle_events(&mut self) -> bool { + if !event::poll(Duration::from_secs(0)).expect("could not poll") { + return true; + } + + match event::read().expect("could not read event") { + Event::Key(key_event) if key_event.kind == KeyEventKind::Press => { + self.handle_key_press(key_event) + } + event => { + debug!("unhandled event {event:?}"); + return true; + } + } + } + + fn handle_key_press(&mut self, event: KeyEvent) -> bool { + match event.code { + KeyCode::Char('q') => { + warn!("q pressed, terminating"); + return false; + } + KeyCode::Char(' ') => { + info!("generating new random field"); + self.field = Self::make_random_field(self.probability); + } + key_code => { + debug!("unhandled KeyCode {key_code:?}"); + } + } + true + } + + fn change_brightness(&self) { + let mut rng = rand::thread_rng(); + + if !rng.gen_ratio(1, 10) { + return; + } + + let min_size = 1; + let x = rng.gen_range(0..TILE_WIDTH - min_size); + let y = rng.gen_range(0..TILE_HEIGHT - min_size); + + let w = rng.gen_range(min_size..=TILE_WIDTH - x); + let h = rng.gen_range(min_size..=TILE_HEIGHT - y); + + let origin = Origin(x, y); + let mut luma = ByteGrid::new(w as usize, h as usize); + + for y in 0..h as usize { + for x in 0..w as usize { + luma.set(x, y, rng.gen()); + } + } + + self.connection + .send(CharBrightness(origin, luma).into()) + .expect("could not send brightness"); + } +} diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..038126c --- /dev/null +++ b/src/main.rs @@ -0,0 +1,46 @@ +use std::time::Duration; +use std::{io, thread}; + +use clap::Parser; +use crossterm::execute; +use crossterm::terminal::{EnterAlternateScreen, LeaveAlternateScreen}; +use log::LevelFilter; +use servicepoint2::Connection; + +use crate::app::App; + +mod app; + +#[derive(Parser, Debug)] +struct Cli { + #[arg(short, long, default_value = "localhost:2342")] + destination: String, + #[arg(short, long, default_value_t = 0.5f64)] + probability: f64, +} + +fn main() { + env_logger::builder() + .filter_level(LevelFilter::Info) + .parse_default_env() + .init(); + + let cli = Cli::parse(); + let connection = Connection::open(&cli.destination) + .expect("Could not connect. Did you forget `--destination`?"); + + let entered_alternate = execute!(io::stdout(), EnterAlternateScreen).is_ok(); + + crossterm::terminal::enable_raw_mode().expect("could not enable raw terminal mode"); + + let mut app = App::new(connection, &cli); + while app.step() { + thread::sleep(Duration::from_millis(30)); + } + + crossterm::terminal::disable_raw_mode().expect("could not disable raw terminal mode"); + + if entered_alternate { + execute!(io::stdout(), LeaveAlternateScreen).expect("could not leave alternate screen"); + } +}