pop
/
martian-chess
1
1
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merging moves implemented ish

Browse Source 
At least on the backend. Not sure they're rendered.

God bless test driven development, amirite?
main
Elijah C. Voigt 2 years ago
parent 40b40ae887
commit 80738dd217
1 changed files with 169 additions and 82 deletions
Show Stats Download Patch File Download Diff File

251
src/game.rs
Unescape Escape View File

@ -290,11 +290,12 @@ impl From<(usize, usize)> for BoardIndex {
}
}
#[derive(Debug)]
#[derive(Debug, PartialEq)]
pub(crate) enum MoveType {
Valid,
Invalid,
Capture,
Merge,
}
#[derive(Debug, Component, PartialEq, Clone, Copy, Eq, Hash, Default)]
@ -366,14 +367,10 @@ impl Board {
fn new() -> Board {
Board::from_ascii(
r#"...###..
####q###
...###..
..#.#.#."#,
// r#".....dqq
// dpp..pdq
// qdp..ppd
// qqd....."#,
r#".....dqq
dpp..pdq
qdp..ppd
qqd....."#,
)
}
@ -513,92 +510,93 @@ impl Board {
/// Determine given a piece, a to, and a from, what type of move this would be
pub(crate) fn move_type(
&self,
piece: Piece,
from: BoardIndex,
to: BoardIndex,
) -> Option<MoveType> {
// Iterate over the piece's moves
piece
.moves_at(&from)
.iter()
// Find if the given `to` move is one of those
.find(|idx| to == **idx)
// Determine if this is valid/legal in this situation
.and_then(|_| {
let dest_at = self.at(to);
let curr_side = Board::side(from).unwrap();
let dest_side = Board::side(to).unwrap();
match (curr_side, dest_side) {
(Side::A, Side::A) | (Side::B, Side::B) => {
match dest_at {
// Cannot move on top of a friendly
Some(_) => Some(MoveType::Invalid),
// Any other spot is valid
None => {
// If there is another piece between A and B
if self
.line(from, to)
.any(|board_index| self.at(board_index).is_some())
{
// Invalid move, there is a piece between A and B
Some(MoveType::Invalid)
} else {
// Otherwise it's a valid
Some(MoveType::Valid)
self.at(from).map(|piece| {
// Given that the side does not have a queen||drone
// And the piece is a drone||pawn
// We can do field promotions
let side = Board::side(from).expect("Piece has valid index");
let side_has_queen = self.on(side).iter().any(|(piece, _)| **piece == Piece::Queen);
let side_has_drone = self.on(side).iter().any(|(piece, _)| **piece == Piece::Drone);
// Iterate over the piece's moves
piece
.moves_at(&from)
.iter()
// Find if the given `to` move is one of those
.find(|idx| to == **idx)
// Determine if this is valid/legal in this situation
.and_then(|_| {
let dest_at = self.at(to);
let curr_side = Board::side(from).unwrap();
let dest_side = Board::side(to).unwrap();
match (curr_side, dest_side) {
(Side::A, Side::A) | (Side::B, Side::B) => {
match dest_at {
// Cannot move on top of a friendly
Some(to_piece) => {
(!self.line(from, to)
.any(|board_index| self.at(board_index)
.is_some())
).then(|| {
match (piece, to_piece) {
(Piece::Pawn, Piece::Pawn) => {
(!side_has_drone).then_some(MoveType::Merge)
}
(Piece::Drone, Piece::Pawn) | (Piece::Pawn, Piece::Drone) => {
(!side_has_queen).then_some(MoveType::Merge)
},
_ => {
Some(MoveType::Invalid)
}
}
}).flatten()
},
// Any other spot is valid
None => {
// If there is another piece between A and B
(!self
.line(from, to)
.any(|board_index| self.at(board_index).is_some()))
.then_some(MoveType::Valid)
}
}
}
}
// Check for moving across the canal
(Side::A, Side::B) | (Side::B, Side::A) => {
match dest_at {
Some(_) => {
// If there is another piece between A and B
if self
.line(from, to)
.any(|board_index| self.at(board_index).is_some())
{
// Invalid move, there is a piece between A and B
Some(MoveType::Invalid)
} else {
// Otherwise it's a capture
Some(MoveType::Capture)
// Check for moving across the canal
(Side::A, Side::B) | (Side::B, Side::A) => {
match dest_at {
Some(_) => {
// If there is no other piece between A and B
(!self
.line(from, to)
.any(|board_index| self.at(board_index).is_some()))
.then_some(MoveType::Capture)
}
}
None => {
// move is valid if it does not un-do the previous move
match self.moves.last() {
Some(previous) => {
// If the last `from` is the current destination
// The move is not valid
if previous.from == to {
Some(MoveType::Invalid)
// Otherwise we're good to move there
} else {
Some(MoveType::Valid)
None => {
// move is valid if it does not un-do the previous move
match self.moves.last() {
Some(previous) => {
(previous.from != to).then_some(MoveType::Valid)
}
}
// First move in the game, this is valid (and impossible)
None => {
// If there is another piece between A and B
if self
.line(from, to)
.any(|board_index| self.at(board_index).is_some())
{
// Invalid move, there is a piece between A and B
Some(MoveType::Invalid)
} else {
// Otherwise it's a valid
Some(MoveType::Valid)
// First move in the game, this is valid (and impossible)
None => {
// If there is no other pieces between A and B
// the move is valid
(!self
.line(from, to)
.any(|board_index| self.at(board_index).is_some()))
.then_some(MoveType::Valid)
}
}
}
}
}
}
}
})
})
}).flatten().or(Some(MoveType::Invalid))
}
/// Returns the possible moves the piece at this tile can make.
@ -606,7 +604,7 @@ impl Board {
if let Some(piece) = self.at(current_board_index) {
piece.moves_at(&current_board_index).iter().filter_map(|move_index| {
// Get the move type (or none if totally invalid)
match self.move_type(*piece, current_board_index, *move_index) {
match self.move_type(current_board_index, *move_index) {
None | Some(MoveType::Invalid) => None,
_ => Some(*move_index),
}
@ -757,6 +755,23 @@ mod test {
"Mostly blocked queen, moves include captures"
);
}
// Pawn can merge with pawn
{
let given = board.valid_moves((0, 0).into());
let expected: HashSet<BoardIndex> = HashSet::from([(1, 1).into()]);
assert_eq!(expected, given, "Pawn can merge to make a drone");
let move_type = board.move_type((0, 0).into(), (1, 1).into());
assert_eq!(Some(MoveType::Merge), move_type);
}
// Pawn cannot merge with queen
{
let given = board.valid_moves((2, 1).into());
let expected: HashSet<BoardIndex> = HashSet::from([(3, 0).into(), (3, 2).into(), (1, 2).into()]);
assert_eq!(expected, given, "Pawn cannot merge with queen");
}
}
/// Can move up to but not over friendlies
@ -836,6 +851,78 @@ mod test {
assert_eq!(expected, given, "Drone moves at");
}
#[test]
fn test_capture_01() {
let board = Board::from_ascii(
r#"...p....
........
.ppd.q..
........"#,
);
// Drone can move in all expected ways
{
let expected: HashSet<BoardIndex> = HashSet::from([
(2, 1).into(),
(3, 0).into(),
(3, 2).into(),
(3, 3).into(),
(4, 1).into(),
(5, 1).into(),
]);
let actual = board.valid_moves((3, 1).into());
assert_eq!(expected, actual);
// Merging drone and pawn to make a queen
let capture_move = board.move_type((3, 1).into(), (5, 1).into());
assert_eq!(Some(MoveType::Capture), capture_move);
// Merging does not cross the canal
let merge_move = board.move_type((3, 1).into(), (2, 1).into());
assert_eq!(Some(MoveType::Merge), merge_move);
let long_merge_move = board.move_type((3, 1).into(), (3, 3).into());
assert_eq!(Some(MoveType::Merge), long_merge_move);
// Still cannot cross over friendlies
let jump_move = board.move_type((3, 1).into(), (1, 1).into());
assert_eq!(Some(MoveType::Invalid), jump_move);
}
}
#[test]
fn test_capture_02() {
let board = Board::from_ascii(
r#"........
..p.p...
...p....
........"#,
);
{
// All normal moves for pawn are valid
let given = board.valid_moves((3, 1).into());
let expected: HashSet<BoardIndex> = HashSet::from([(2, 0).into(), (4, 0).into(), (2, 2).into(), (4, 2).into()]);
assert_eq!(expected, given);
// Pawn + Pawn on same side = Promotion
let merge_move = board.move_type((3, 1).into(), (2, 2).into());
assert_eq!(Some(MoveType::Merge), merge_move);
// Pawn + Pawn on other side = Capture
let capture_move = board.move_type((3, 1).into(), (4, 2).into());
assert_eq!(Some(MoveType::Capture), capture_move);
// Pawn + Empty = Move
let place_move = board.move_type((3, 1).into(), (2, 0).into());
assert_eq!(Some(MoveType::Valid), place_move);
// Pawn + Invalid Empty = Invalid
let invalid_move = board.move_type((3, 1).into(), (7, 7).into());
assert_eq!(Some(MoveType::Invalid), invalid_move);
}
}
}
impl std::fmt::Display for Board {

Write Preview
Loading…
Cancel
Save