Fixed food spawning and snake collision

Fixed the food spawning in the walls
Fixed the snake not colliding with itself
Added speed control to the snake
Exit if the ncurses window is too small

src/game/backend.rs

@@ -69,8 +69,8 @@ impl Cell {
     pub fn random(lines: i32, cols: i32) -> Cell {
         let mut rng = rand::thread_rng();
         Cell::new(
-            rng.gen_range(1..lines),
+            rng.gen_range(1..lines - 1),
-            rng.gen_range(1..cols),
+            rng.gen_range(1..cols - 1),
             CellType::Food,
         )
     }
@@ -97,7 +97,7 @@ impl Clone for Cell {
 
 enum FailState {
     Wall,
-    // Body,
+    Snake,
 }
 
 enum GameState {
@@ -133,6 +133,14 @@ impl Board {
             self.gamestate = GameState::Failed(FailState::Wall);
             return true;
         }
+        let mut snake_iter = snake.iter();
+        snake_iter.next();
+        for snake_cell in snake_iter {
+            if snake.posyx() == snake_cell.posyx() {
+                self.gamestate = GameState::Failed(FailState::Snake);
+                return true;
+            }
+        }
         return false;
     }
     pub fn check_food(&self, snake: &Snake) -> bool {
@@ -176,6 +184,7 @@ pub struct Snake {
     body: LinkedList<Cell>,
     direction: Direction,
     grow: bool,
+    speed: i32,
 }
 impl Snake {
     pub fn new(head: Cell) -> Snake {
@@ -187,6 +196,7 @@ impl Snake {
             // length: 1,
             direction: Direction::Right,
             grow: false,
+            speed: 15,
         }
     }
     pub fn posyx(&self) -> (i32, i32) {
@@ -217,8 +227,12 @@ impl Snake {
         self.body.push_front(self.head);
         self.grow = false;
     }
-    pub fn tick(&mut self, time: Duration) {
+    pub fn tick(&mut self) {
-        sleep(time);
+        // sleep(time);
+        // let time: std::time::Duration =
+        //     std::time::Duration::from_millis((1000 / self.speed) as u64);
+        // sleep(time);
+        sleep(Duration::from_millis((1000 / self.speed) as u64));
         self.smove(self.direction);
     }
     pub fn grow(&mut self) {

src/game/mod.rs

@@ -12,8 +12,13 @@ pub fn start() {
     let mut ch: i32;
     let (vmargin, hmargin): (i32, i32) = (5, 10);
     getmaxyx(stdscr(), &mut mlines, &mut mcols);
+
     game_win = frontend::game_window(mlines, mcols, vmargin, hmargin);
-    let mut snake = Snake::new(Cell::new(mlines / 2, mcols / 2, backend::CellType::Snake)); //Initialise snake in the middle of the screen
+    let mut snake = Snake::new(Cell::new(
+        mlines / 2 - vmargin,
+        mcols / 2 - hmargin,
+        backend::CellType::Snake,
+    )); //Initialise snake in the middle of the screen
     let mut board = Board::new(mlines - vmargin * 2, mcols - hmargin * 2);
     nodelay(game_win, true);
     loop {
@@ -21,6 +26,8 @@ pub fn start() {
         frontend::draw_board(&board, game_win);
         // frontend::_log(&snake, &board);
         if board.check_collision(&snake) {
+            // Add stuff here to show the score and
+            // how You lose screen
             break;
         }
         if board.check_food(&snake) {
@@ -50,7 +57,7 @@ pub fn start() {
                 nodelay(game_win, true);
             }
             // 27 => break,
-            _ => snake.tick(std::time::Duration::from_millis(100)),
+            _ => snake.tick(),
         }
     }
 

src/main.rs

@@ -4,7 +4,9 @@ mod highscore;
 mod menu;
 // use game::{Cell, Snake};
 // use ncurses::*;
-use ncurses::{curs_set, endwin, initscr, keypad, noecho, raw, refresh, stdscr, CURSOR_VISIBILITY};
+use ncurses::{
+    curs_set, endwin, getmaxyx, initscr, keypad, noecho, raw, refresh, stdscr, CURSOR_VISIBILITY,
+};
 
 fn main() {
     // let (lines, cols): (i32, i32) = (0, 0);
@@ -13,6 +15,14 @@ fn main() {
     keypad(stdscr(), true);
     curs_set(CURSOR_VISIBILITY::CURSOR_INVISIBLE);
     noecho();
+    let (mut mlines, mut mcols): (i32, i32) = (0, 0);
+    getmaxyx(stdscr(), &mut mlines, &mut mcols);
+    if (mlines < 20) || (mcols < 35) {
+        refresh();
+        endwin();
+        eprintln!("Sorry window size too small");
+        std::process::exit(1);
+    }
     loop {
         match menu::main_menu_control() {
             0 => game::start(),