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Merge pull request #6 from Jayllyz/feature/darkUI&clean
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| use rand::Rng; | ||
|
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| const SQUARE_SIZE: usize = 3; | ||
|
|
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| pub fn generate(size: usize, difficulty: usize) -> Vec<Vec<usize>> { | ||
| let mut board = vec![vec![0; size]; size]; | ||
| let mut rng = rand::thread_rng(); | ||
| let luck: f64; | ||
| match difficulty { | ||
| 1 => luck = 0.4, | ||
| 2 => luck = 0.5, | ||
| 3 => luck = 0.6, | ||
| _ => luck = 0.4, | ||
| } | ||
| resolv_backtrack(&mut board, 0, 0); // generate a valid board | ||
| for i in 0..size { | ||
| for j in 0..size { | ||
| if rng.gen_bool(luck) { | ||
| board[i][j] = 0; | ||
| } | ||
| } | ||
| } | ||
| board | ||
| } | ||
| pub fn is_num_valid(board: &Vec<Vec<usize>>, row: usize, col: usize, num: usize) -> bool { | ||
| for i in 0..board.len() { | ||
| if board[row][i] == num || board[i][col] == num { | ||
| return false; | ||
| } | ||
| } | ||
|
|
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| let sub_row = (row / SQUARE_SIZE) * SQUARE_SIZE; | ||
| let sub_col = (col / SQUARE_SIZE) * SQUARE_SIZE; | ||
| for i in 0..SQUARE_SIZE { | ||
| for j in 0..SQUARE_SIZE { | ||
| if board[sub_row + i][sub_col + j] == num { | ||
| return false; | ||
| } | ||
| } | ||
| } | ||
| true | ||
| } | ||
|
|
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| // backtracking algorithm | ||
| // https://en.wikipedia.org/wiki/Sudoku_solving_algorithms#Backtracking | ||
| // inspired by https://gist.github.com/raeffu/8331328 | ||
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| pub fn resolv_backtrack(board: &mut Vec<Vec<usize>>, mut row: usize, mut col: usize) -> bool { | ||
| if col == board.len() { | ||
| col = 0; | ||
| row += 1; | ||
| if row == board.len() { | ||
| // end of board | ||
| return true; | ||
| } | ||
| } | ||
|
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| if board[row][col] != 0 { | ||
| return resolv_backtrack(board, row, col + 1); | ||
| } | ||
|
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| for num in 1..=board.len() { | ||
| if is_num_valid(board, row, col, num) { | ||
| board[row][col] = num; | ||
| if resolv_backtrack(board, row, col + 1) { | ||
| // found a number | ||
| return true; | ||
| } | ||
| // backtrack | ||
| board[row][col] = 0; | ||
| } | ||
| } | ||
|
|
||
| false | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| <footer> | ||
| <p>Made in rust with Actix.</p> | ||
| <p>Copyright © <a href="https://github.com/Jayllyz">Jayllyz</a></p> | ||
| </footer> |
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