src/main.rs

   1 pub mod display;
   2 pub mod game;
   3
   4 use crossterm::{cursor, event, execute, queue, terminal};
   5 use game::{Board, Dir::*, Pos};
   6 use std::io::Write;
   7
   8 fn main() {
   9     let mut rng = rand::thread_rng();
  10
  11     let mut stdout = std::io::stdout();
  12     queue!(stdout, terminal::EnterAlternateScreen, cursor::Hide).unwrap();
  13
  14     terminal::enable_raw_mode().unwrap();
  15
  16     let board = Board::new(Pos::new(4, 4));
  17     board.spawn(&mut rng);
  18     board.spawn(&mut rng);
  19
  20     loop {
  21         queue!(
  22             stdout,
  23             terminal::Clear(terminal::ClearType::All),
  24             cursor::MoveTo(0, 0)
  25         )
  26         .unwrap();
  27         display::display_board(&mut stdout, &board).unwrap();
  28         stdout.flush().unwrap();
  29
  30         if let Ok(evt) = event::read() {
  31             match evt {
  32                 event::Event::Key(event::KeyEvent { code, .. }) => match code {
  33                     event::KeyCode::Char(ch) => {
  34                         if board.step(match ch.to_ascii_lowercase() {
  35                             'w' => Up,
  36                             'a' => Left,
  37                             's' => Down,
  38                             'd' => Right,
  39                             'q' => break,
  40                             _ => continue,
  41                         }) {
  42                             board.spawn(&mut rng);
  43                         }
  44                     }
  45                     _ => {}
  46                 },
  47                 _ => {}
  48             }
  49         } else {
  50             break;
  51         }
  52     }
  53
  54     terminal::disable_raw_mode().unwrap();
  55     execute!(stdout, cursor::Show, terminal::LeaveAlternateScreen).unwrap();
  56 }