check_buddy/moves/
position_move.rs

1#[derive(Clone, Copy, Debug)]
2pub struct PositionMove {
3    pub from: Position,
4    pub to: Position,
5    pub en_passant: bool,
6    pub promotion: bool,
7    pub promotion_piece: u32, // QUEEN, ROOK, BISHOP, or KNIGHT constant
8}
9
10impl Default for PositionMove {
11    fn default() -> Self {
12        use crate::piece_type::QUEEN;
13        Self {
14            from: [0, 0],
15            to: [0, 0],
16            en_passant: false,
17            promotion: false,
18            promotion_piece: QUEEN,
19        }
20    }
21}
22
23impl PositionMove {
24    pub fn new(from: Position, to: Position) -> Self {
25        Self {
26            from,
27            to,
28            ..Default::default()
29        }
30    }
31}
32
33pub type Position = [usize; 2];
34
35pub enum Direction {
36    North,
37    East,
38    South,
39    West,
40    NorthEast,
41    SouthEast,
42    SouthWest,
43    NorthWest,
44}
45
46pub const DIRECTION_OFFSETS: [i32; 8] = [8, 1, -8, -1, 9, -7, -9, 7];
47pub const KNIGHT_DIRECTION_OFFSETS: [[i32; 2]; 8] = [
48    //[Y,X]
49    [1, -2],
50    [2, -1],
51    [2, 1],
52    [1, 2],
53    [-1, 2],
54    [-2, 1],
55    [-2, -1],
56    [-1, -2],
57];
58
59impl Direction {
60    pub fn from(index: usize) -> Self {
61        match index {
62            0 => Direction::North,     // 8
63            1 => Direction::East,      // 1
64            2 => Direction::South,     // -8
65            3 => Direction::West,      //-1
66            4 => Direction::NorthEast, // 9
67            5 => Direction::SouthEast, // -7
68            6 => Direction::SouthWest, // -9
69            7 => Direction::NorthWest, //7
70            _ => unreachable!(),
71        }
72    }
73}
check_buddy/moves/position_move.rs

check_buddy/moves/
position_move.rs
