Add unicode snake printing

Removed a lot of unused and commented code

README.md

@@ -1,4 +1,4 @@
-## Snake in rust using [ncurses](https://docs.rs/ncurses)
+## Snake in rust using [ncurses](https://docs.rs/ncurses) crate
 
 The game is playable
 
@@ -18,7 +18,19 @@ esc or p to pause
 
 Click the image for asciinema
 
-[<img src="images/screenshot.png" width="650" />](https://asciinema.org/a/PtMG7dghPAEZ7tNgx70sKplKq?autoplay=1)
+[<img src="images/screenshot.png" width="650" />](https://asciinema.org/a/FVB1DZmA7lVK4BILFkzkreMQ9?autoplay=1)
+
+#### Need unicode support in terminal to print the snake
+
+The unicode characters used are:
+
+- 0x0298 ʘ
+- 0x2550 ═
+- 0x2551 ║
+- 0x2554 ╔
+- 0x2557 ╗
+- 0x255a ╚
+- 0x255d ╝
 
 #### Todo :construction:
 
@@ -28,13 +40,16 @@ Click the image for asciinema
 - [ ] Implement Highscore System
   - [ ] Make the ui
   - [ ] Internal Implementation
+- [x] Use unicode charachters to draw the snake
 
 #### Bugs :bug:
 
 - ~~Snake going through the walls~~
 - ~~Food spawning in the walls~~
+- ~~Boxdraw characters not rendering properly~~
 - Remove all the logging in the ui
 - Pausing delayed if esc is pressed but not if p is pressed.
+- The game flickers a lot after sometime (probably due to the constant redrawing of the whole board every tick)
 
 #### Maybe in the future
 
@@ -42,19 +57,32 @@ Click the image for asciinema
 
 #### Notes
 
-A few notes about the complexity of the game and how I should improve the game
+A few notes about the game and how I should improve the game
 
 <details>
-<summary>Read More</summary>
+<summary>A few notes about time complexity and redrawing with ncurses</summary>
 
-The complexity of the program is O(n) every tick (time which changes relative to the speed)
+> The complexity of the program is O(n) every tick (time which changes relative to the speed)
 
-However the place, I can improve is the redrawing of the game
+> However the place, I can improve is the redrawing of the game
 
-As of commit
+> At the time of writing the in commit
-<a href="https://github.com/uttarayan21/snake/commit/de66f7d249a56f883dd632598a4178b1bd1320ba">f9be68e</a>
+> <a href="https://github.com/uttarayan21/snake/commit/de66f7d249a56f883dd632598a4178b1bd1320ba">f9be68e</a>
-the game redraws the total board and the total snake every tick.
+> the game still redraws the total board and the total snake every tick.
 
-I think this can be improved by only drawing the parts of the snake and the board when needed
+> I think this can be improved by only drawing the parts of the snake and the board when needed
+
+</details>
+<br>
+
+<details>
+
+<summary>Rust specific stuff I learned</summary>
+
+> [char](https://doc.rust-lang.org/stable/std/primitive.char.html) and [std::char](https://doc.rust-lang.org/stable/std/char/index.html) are different
+
+> [char](https://doc.rust-lang.org/stable/std/primitive.char.html) is the primitive type [std::char](https://doc.rust-lang.org/stable/std/char/index.html) is the char module. All the functions are not completely same for both (as of rust v1.49.0)
+
+> [ncursesw](httsp://docs.rs/ncursesw) is not needed to print unicode characters. I have no clue where I got that idea from.
 
 </details>

src/game/backend.rs

@@ -5,6 +5,7 @@ use std::collections::LinkedList;
 use std::ops::Sub;
 use std::thread::sleep;
 use std::time::Duration;
+#[derive(Debug)]
 pub enum Direction {
     Up,
     Down,
@@ -39,6 +40,20 @@ impl Direction {
         }
     }
 }
+#[derive(Debug)]
+// impl std::fmt::Debug for Direction {
+//     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+//         // write!(f,)
+//         write!(
+//             f,
+//             "{}",
+//             match *self {
+//                 Self::Up => (),
+//                 _ => (),
+//             }
+//         );
+//     }
+// }
 
 pub enum CellType {
     Food,
@@ -89,10 +104,10 @@ impl Cell {
     }
     pub fn is_adjacent(&self, other: &Cell) -> Option<Direction> {
         match *self - *other {
-            (0, 1) => Some(Direction::Left),
+            (0, 1) => Some(Direction::Right),
             (1, 0) => Some(Direction::Down),
-            (-1, 0) => Some(Direction::Right),
+            (-1, 0) => Some(Direction::Up),
-            (0, -1) => Some(Direction::Up),
+            (0, -1) => Some(Direction::Left),
             _ => None,
         }
     }

src/game/frontend.rs

@@ -10,8 +10,6 @@ pub fn game_window(mlines: i32, mcols: i32, vmargin: i32, hmargin: i32) -> WINDO
     let (starty, startx): (i32, i32);
     lines = mlines - vmargin * 2;
     cols = mcols - hmargin * 2;
-    // starty = (mlines - lines) / 2;
-    // startx = (mcols - cols) / 2;
     starty = vmargin;
     startx = hmargin;
     game_win = newwin(lines, cols, starty, startx);
@@ -41,54 +39,67 @@ pub fn draw_snake(snake: &Snake, game_win: WINDOW) {
     // So I'll need to know the last and next cell of the snake to draw the current snake_cell
     // For some reason the snake goes invisible after the first food
     prev = snake_iter.next().unwrap(); // currently this should be head. On initial run this should be the only snake_cell
-    mvwaddstr(game_win, prev.posyx().0, prev.posyx().1, &format!("H"));
+    mvwaddstr(
+        game_win,
+        prev.posyx().0,
+        prev.posyx().1,
+        &format!("{}", std::char::from_u32(0x0298).unwrap_or('O')),
+    );
     let _current = snake_iter.next();
-    // current = match _current {
+    current = match _current {
-    //     Some(cell) => cell,
+        Some(cell) => cell,
-    //     None => return,
+        None => return,
-    // };
+    };
-    if _current.is_some() {
-        current = _current.unwrap();
-    } else {
-        return;
-    } // the match is equivalent to this block of code
-      // this should be none in the initial run
-      // as of now this will panic as soon as the game starts
-      // I need to match this with Some(Cell) and None and if
-      // none then just straight exit from the function
-
-    // The head is never in current so the head is not being printed as of now
     for next in snake_iter {
         // O(n) the whole snake is redrawn every single tick
         let (snake_l, snake_c): (i32, i32) = current.posyx();
         // mvwaddstr(game_win, snake_l, snake_c, "o");
-        let snake_char = match (
+        let snake_char: u32 = match (
             prev.is_adjacent(current).unwrap(),
             next.is_adjacent(current).unwrap(),
         ) {
-            (Direction::Up, Direction::Down) | (Direction::Down, Direction::Up) => "║", //186, //boxdraw double vertical line ║ code 186
+            (Direction::Up, Direction::Down) | (Direction::Down, Direction::Up) => 0x2551, //"║"
-            (Direction::Up, Direction::Left) | (Direction::Left, Direction::Left) => "╝", //188, // ╝
+            (Direction::Up, Direction::Left) | (Direction::Left, Direction::Up) => 0x255d, //"╝"
-            (Direction::Up, Direction::Right) | (Direction::Right, Direction::Up) => "╚", //200, // ╚
+            (Direction::Up, Direction::Right) | (Direction::Right, Direction::Up) => 0x255a, //"╚"
-            (Direction::Down, Direction::Left) | (Direction::Left, Direction::Down) => "╗", //187, // ╗
+            (Direction::Down, Direction::Left) | (Direction::Left, Direction::Down) => 0x2557, // "╗"
-            (Direction::Down, Direction::Right) | (Direction::Right, Direction::Down) => "╔", //,201, // ╔
+            (Direction::Down, Direction::Right) | (Direction::Right, Direction::Down) => 0x2554, //"╔"
-            (Direction::Left, Direction::Right) | (Direction::Right, Direction::Left) => "═", //205 ═
+            (Direction::Left, Direction::Right) | (Direction::Right, Direction::Left) => 0x2550, //"═"
-            _ => " ",
+            _ => 0x20,
         };
         mvwaddstr(
-            game_win, snake_l, snake_c, // &format!("{}", snake_char as char),
+            game_win,
-            // &format!("{}", snake_char),
+            snake_l,
-            "o",
+            snake_c,
+            &format!("{}", std::char::from_u32(snake_char).unwrap_or('o')),
         );
         prev = current;
         current = next;
     }
-    mvwaddstr(game_win, current.posyx().0, current.posyx().1, "t");
+
+    mvwaddstr(
+        game_win,
+        current.posyx().0,
+        current.posyx().1,
+        &format!(
+            "{}",
+            std::char::from_u32(match current.is_adjacent(prev).unwrap() {
+                Direction::Up | Direction::Down => 0x2551,
+                Direction::Left | Direction::Right => 0x2550,
+            })
+            .unwrap_or('o')
+        ),
+    );
     wrefresh(game_win);
 }
 
 pub fn draw_board(board: &Board, game_win: WINDOW) {
     let (food_l, food_c): (i32, i32) = board.food_posyx();
-    mvwaddstr(game_win, food_l, food_c, "F");
+    mvwaddstr(
+        game_win,
+        food_l,
+        food_c,
+        &format!("{}", std::char::from_u32(0x0298).unwrap_or('F')),
+    );
 }
 
 pub fn _log(snake: &Snake, board: &Board) {
@@ -96,26 +107,16 @@ pub fn _log(snake: &Snake, board: &Board) {
     let (bfl, bfc): (i32, i32) = board.food_posyx();
     mvwaddstr(stdscr(), 0, 0, &format!("snake:head: {} {} ", shl, shc));
     mvwaddstr(stdscr(), 1, 0, &format!("board:food: {} {} ", bfl, bfc));
-    // mvwaddstr(
-    //     stdscr(),
-    //     2,
-    //     0,
-    //     &format!(
-    //         "board:maxlines {} maxcols {}",
-    //         board.maxlines, board.maxcols
-    //     ),
-    // );
-
     wmove(stdscr(), 2, 0);
     for snake_cell in snake.iter() {
-        let (scl, scc): (i32, i32) = snake_cell.posyx();
+        waddstr(
-        waddstr(stdscr(), &format!("cell: {} {} ", scl, scc));
+            stdscr(),
+            &format!(
+                "<cell y:{} x:{}>",
+                snake_cell.posyx().0,
+                snake_cell.posyx().1
+            ),
+        );
     }
-    mvwaddstr(
-        stdscr(),
-        3,
-        0,
-        &format!("snake_size {}", snake.iter().size_hint().0),
-    );
     wrefresh(stdscr());
 }

src/game/mod.rs

@@ -24,7 +24,7 @@ pub fn start() {
     loop {
         frontend::draw_snake(&snake, game_win); // always draw snake before board because the snake will clear the game win
         frontend::draw_board(&board, game_win);
-        frontend::_log(&snake, &board);
+        // frontend::_log(&snake, &board);
         if board.check_collision(&snake) {
             // Add stuff here to show the score and
             // how You lose screen

src/main.rs

@@ -5,11 +5,13 @@ mod menu;
 // use game::{Cell, Snake};
 // use ncurses::*;
 use ncurses::{
-    curs_set, endwin, getmaxyx, initscr, keypad, noecho, raw, refresh, stdscr, CURSOR_VISIBILITY,
+    curs_set, endwin, getmaxyx, initscr, keypad, noecho, raw, refresh, setlocale, stdscr,
+    LcCategory, CURSOR_VISIBILITY,
 };
 
 fn main() {
     // let (lines, cols): (i32, i32) = (0, 0);
+    setlocale(LcCategory::all, "");
     initscr();
     raw();
     keypad(stdscr(), true);
@@ -17,10 +19,6 @@ fn main() {
     noecho();
     let (mut mlines, mut mcols): (i32, i32) = (0, 0);
     getmaxyx(stdscr(), &mut mlines, &mut mcols);
-    // let (mlines, mcols) = match getmaxyx(stdscr()) {
-    //     Ok(size) => (size.lines, size.columns),
-    //     Err(e) => panic!(e),
-    // };
     if (mlines < 20) || (mcols < 35) {
         refresh();
         endwin();