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2 Commits
f4168c449b ... 6d415468e0

Author SHA1 Message Date
Walter Oggioni
6d415468e0 temporary commit 2025-07-01 22:16:32 +08:00
Walter Oggioni
1348d8369f added undo/redo feature 2025-07-01 03:06:35 +08:00
19 changed files with 1362 additions and 1001 deletions
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8
Cargo.toml
View File

@@ -1,5 +1,5 @@
[workspace]
members = ["rdraught", "rdraught-cli", "rdraught-pi", "rdraught-ui", "rdraught-w4"]
members = ["rdraught", "rdraught-cli", "rdraught-ui", "rdraught-w4"]
resolver = "3"
[workspace.package]
@@ -22,7 +22,7 @@ gio = "0.20.12"
glib = "0.20.12"
wasm4 = "0.2.0"
wasm4-sys = "0.1.3"
strum = "0.27.1"
strum_macros = "0.27.1"
heapless = "0.8.0"
#[patch.crates-io]
#cairo-rs = { git = "https://github.com/gtk-rs/gtk-rs-core.git", package = "cairo-rs", tag="0.20.12" }
#cairo-sys-rs = { git = "https://github.com/gtk-rs/gtk-rs-core.git", package = "cairo-sys-rs", tag="0.20.12" }

16
rdraught-pi/Cargo.toml
View File

@@ -1,16 +0,0 @@
[package]
name = "rdraught-pi"
version = "0.1.0"
edition = "2024"
authors = ["Walter Oggioni <oggioni.walter@gmail.com>"]
license = "MIT"
rust-version = "1.87"
[[bin]]
name = "hello"
path = "src/hello.rs"
[dependencies]
panic-halt = "1.0"
libc = { version = "0.2", default-features = false }

17
rdraught-pi/src/hello.rs
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@@ -1,17 +0,0 @@
#![no_std]
#![no_main]
use libc::printf;
extern crate libc;
extern crate panic_halt;
#[link(name = "c", kind = "static")]
unsafe extern "C" {}
#[unsafe(no_mangle)]
pub extern "C" fn main() {
unsafe {
printf("Hello world!!\n".as_ptr() as *const i8);
}
}

13
rdraught-ui/Cargo.toml
View File

@@ -11,12 +11,17 @@ version.workspace = true
[dependencies]
gtk4.workspace = true
gdk4.workspace = true
rdraught.workspace = true
rdraught = {workspace = true, features = ["std"]}
librsvg.workspace = true
cairo-rs.workspace = true
gio.workspace = true
glib.workspace = true
# [[bin]]
# name = "dialog_test"
# path = "src/greeting_dialog.rs"
[lib]
name = "rdraught_ui"
crate-type = ["lib"]
bench = false
[[bin]]
name = "rdraught-ui"
path = "src/main.rs"

19
rdraught-ui/examples/ai_debugger.rs Normal file
View File

@@ -0,0 +1,19 @@
use glib::ExitCode;
use rdraught::draughts::DraughtsGame;
use rdraught::{draughts::Piece, draughts::Player, position::Position};
use rdraught_ui::run;
use std::collections::HashMap;
fn main() -> ExitCode {
let mut pieces = HashMap::<Position, Piece>::new();
pieces.insert(Position::new(2, 4), Piece::CrownedRedPawn);
pieces.insert(Position::new(5, 5), Piece::CrownedWhitePawn);
let game = DraughtsGame::new(
|p| match pieces.get(&p) {
None => Piece::NoPiece,
Some(piece) => *piece,
},
Player::Red,
);
run(game)
}

12
rdraught-ui/src/final_dialog.rs Normal file
View File

@@ -0,0 +1,12 @@
use gtk4::{AlertDialog, Window, prelude::IsA};
use rdraught::Player;
pub(crate) async fn create_dialog<W: IsA<Window>>(window: W, winner: Player) {
let msg = match winner {
Player::Red => String::from("Red player wins"),
Player::White => String::from("White player wins"),
};
let info_dialog = AlertDialog::builder().modal(true).message(msg).build();
info_dialog.show(Some(&window));
}

2
rdraught-ui/src/greeting_dialog.rs
View File

@@ -1,7 +1,7 @@
use gtk4::{Align, Application, Box, CheckButton, Label, Orientation, Window, prelude::*};
use crate::types::SharedMutable;
use rdraught::draughts::Player;
use rdraught::Player;
pub(crate) fn create(application: &Application, current_player: SharedMutable<Player>) -> Window {
let label = Label::builder().label("Main player:").build();

8
rdraught-ui/src/lib.rs Normal file
View File

@@ -0,0 +1,8 @@
mod geo2d;
mod final_dialog;
mod greeting_dialog;
mod rdraught_application;
mod types;
pub use rdraught_application::run;

515
rdraught-ui/src/main.rs
View File

@@ -1,511 +1,8 @@
use gdk4::cairo::{Context as CairoContext, Matrix, Rectangle};
use gtk4::cairo::Error;
use gtk4::glib::{MainContext, Propagation};
use gtk4::{self as gtk, gdk::ffi::GDK_BUTTON_PRIMARY};
use gtk4::{Application, DrawingArea, prelude::*};
use rdraught::draughts::{DraughtsBoard, DraughtsGame, Move, Piece, Player};
use rdraught::position::Position;
mod geo2d;
use core::f64::consts::PI;
use geo2d::Point;
use rsvg::SvgHandle;
use std::thread;
const SQUARE_SIZE: f64 = 1.0;
use glib::ExitCode;
use rdraught::draughts::DraughtsGame;
use rdraught_ui;
mod final_dialog;
mod greeting_dialog;
mod types;
use types::{SharedMutable, SharedMutableRef, new_shared_mut, new_shared_mut_ref};
const CROWN_RED: &[u8] = include_bytes!("crown_red.svg");
const CROWN_WHITE: &[u8] = include_bytes!("crown_white.svg");
fn transform_point(p: &Point, m: &Matrix) -> Point {
let (x, y) = m.transform_point(p.x(), p.y());
Point::new(x, y)
}
trait AugmentedRect {
fn from_points(tl: Point, br: Point) -> Rectangle;
fn center(&self) -> Point;
fn tl(&self) -> Point;
fn br(&self) -> Point;
fn contains(&self, p: &Point) -> bool;
}
impl AugmentedRect for Rectangle {
fn center(&self) -> Point {
Point::new(
self.x() + self.width() / 2.0,
self.y() + self.height() / 2.0,
)
}
fn tl(&self) -> Point {
Point::new(self.x(), self.y())
}
fn br(&self) -> Point {
Point::new(self.x() + self.width(), self.y() + self.height())
}
fn from_points(tl: Point, br: Point) -> Rectangle {
Rectangle::new(tl.x(), tl.y(), br.x() - tl.x(), br.y() - tl.y())
}
fn contains(&self, p: &Point) -> bool {
self.x() < p.x()
&& self.x() + self.width() > p.x()
&& self.y() < p.y()
&& self.y() + self.height() > p.y()
}
}
fn draw_piece(
cr: &CairoContext,
square: &Rectangle,
piece: Piece,
crown_red: &SvgHandle,
crown_white: &SvgHandle,
) -> Result<(), Error> {
if let Piece::NoPiece = piece {
Ok(())
} else {
cr.save()?;
let center = square.center();
let outer_radius = square.width() * 0.3;
let vertical_scale_factor = 0.8;
let matrix = {
let mut m1 = Matrix::identity();
m1.translate(0.0, -(center.y() - outer_radius));
let mut m2 = Matrix::identity();
m2.scale(1.0, vertical_scale_factor);
let mut m3 = Matrix::identity();
m3.translate(0.0, center.y() - outer_radius * vertical_scale_factor);
Matrix::multiply(&Matrix::multiply(&m1, &m2), &m3)
};
cr.set_matrix(Matrix::multiply(&matrix, &cr.matrix()));
cr.set_source_rgb(0.0, 0.0, 0.0);
let thickness = outer_radius * 0.3;
cr.arc(
center.x(),
center.y() + thickness / 2.0,
outer_radius,
0.0,
2.0 * PI,
);
cr.rectangle(
center.x() - outer_radius,
center.y() - thickness / 2.0,
outer_radius * 2.0,
thickness,
);
cr.arc(
center.x(),
center.y() - thickness / 2.0,
outer_radius,
0.0,
2.0 * PI,
);
cr.fill().unwrap();
let (color, crowned) = match piece {
Piece::NoPiece => return Ok(()),
Piece::SimpleRedPawn => ((1.0, 0.0, 0.0), false),
Piece::SimpleWhitePawn => ((1.0, 1.0, 1.0), false),
Piece::CrownedRedPawn => ((1.0, 0.0, 0.0), true),
Piece::CrownedWhitePawn => ((1.0, 1.0, 1.0), true),
};
let radius = square.width() * 0.275;
cr.set_source_rgb(color.0, color.1, color.2);
cr.arc(
center.x(),
center.y() - thickness / 2.0,
radius,
0.0,
2.0 * PI,
);
cr.fill()?;
cr.restore()?;
if crowned {
let renderer = match piece.player() {
Some(Player::Red) => rsvg::CairoRenderer::new(crown_red),
Some(Player::White) => rsvg::CairoRenderer::new(crown_white),
None => panic!("This should never happen"),
};
let m4 = {
let mut m1 = Matrix::identity();
m1.translate(-center.x(), -(center.y() - thickness / 1.0));
let mut m2 = Matrix::identity();
m2.scale(0.5, 0.5);
let mut m3 = Matrix::identity();
m3.translate(center.x(), center.y() - thickness / 1.0);
Matrix::multiply(&Matrix::multiply(&m1, &m2), &m3)
};
cr.set_matrix(Matrix::multiply(
&Matrix::multiply(&matrix, &m4),
&cr.matrix(),
));
renderer
.render_document(
cr,
&cairo::Rectangle::new(
square.tl().x(),
square.tl().y(),
square.width(),
square.height(),
),
)
.unwrap();
}
Ok(())
}
}
fn draw_score_bar(
cr: &CairoContext,
board: &Rectangle,
draughts_game: &DraughtsGame,
current_player: Player,
) {
fn modulate_score(relative_score: f64) -> f64 {
let x = relative_score;
f64::atan(8.0 * x - 4.0) / f64::atan(4.0) / 2.0 + 0.5
}
let score_bar = Rectangle::new(
board.tl().x() - board.width() / 10.0,
board.tl().y(),
board.width() / 16.0,
board.height(),
);
let score_percentage = modulate_score(draughts_game.relative_score(current_player) as f64);
let tl = score_bar.tl();
cr.save().unwrap();
match current_player {
Player::White => cr.set_source_rgb(1.0, 0.0, 0.0),
Player::Red => cr.set_source_rgb(1.0, 1.0, 1.0),
}
cr.rectangle(
score_bar.tl().x(),
score_bar.tl().y(),
score_bar.width(),
score_bar.height() * (1.0 - score_percentage),
);
cr.fill().unwrap();
match current_player {
Player::White => cr.set_source_rgb(1.0, 1.0, 1.0),
Player::Red => cr.set_source_rgb(1.0, 0.0, 0.0),
}
cr.rectangle(
tl.x(),
tl.y() + score_bar.height() * (1.0 - score_percentage),
score_bar.width(),
score_bar.height() * score_percentage,
);
cr.fill().unwrap();
cr.restore().unwrap();
}
fn create_game_window(application: &Application, current_player: Player) {
// Create a new window.
let window = gtk::ApplicationWindow::builder()
.application(application)
.title("Rdraught")
.default_width(800)
.default_height(800)
.build();
// Create a DrawingArea widget where we will draw the chessboard.
let drawing_area = DrawingArea::new();
// Add the drawing area to the window.
window.set_child(Some(&drawing_area));
let draughts_game = new_shared_mut_ref(DraughtsGame::default());
let selected_piece: SharedMutable<Option<Position>> = new_shared_mut(None);
let available_moves = new_shared_mut_ref(Vec::<Move>::new());
// Get the allocation information for the widget.
let board_width = SQUARE_SIZE * DraughtsBoard::rows() as f64;
let board_height = SQUARE_SIZE * DraughtsBoard::columns() as f64;
let board = Rectangle::from_points(Point::new(0.0, 0.0), Point::new(board_width, board_height));
let board_with_bar = Rectangle::from_points(
Point::new(-board_width / 10.0, 0.0),
Point::new(board_width, board_height),
);
let board_clone = board;
let crown_red_handle = {
let stream = gio::MemoryInputStream::from_bytes(&glib::Bytes::from_static(CROWN_RED));
rsvg::Loader::new()
.read_stream(
&stream,
None::<&gio::File>, // no base file as this document has no references
None::<&gio::Cancellable>, // no cancellable
)
.unwrap()
};
let crown_white_handle = {
let stream = gio::MemoryInputStream::from_bytes(&glib::Bytes::from_static(CROWN_WHITE));
rsvg::Loader::new()
.read_stream(
&stream,
None::<&gio::File>, // no base file as this document has no references
None::<&gio::Cancellable>, // no cancellable
)
.unwrap()
};
let xform = new_shared_mut_ref(Matrix::identity());
// Set the "draw" function of the drawing area. This callback is called
// whenever GTK needs to redraw this widget (for example, on first display or when resized).
{
let draughts_game = draughts_game.clone();
let xform = xform.clone();
let selected_piece = selected_piece.clone();
let available_moves = available_moves.clone();
drawing_area.set_draw_func(move |_widget, cr, width, height| {
let screen = Rectangle::from_points(
Point::new(0.0, 0.0),
Point::new(width as f64, height as f64),
);
let f = f64::min(
screen.width() / board_with_bar.width(),
screen.height() / board_with_bar.height(),
);
let screen_center = screen.center();
let board_center = board_with_bar.center();
let mut xform = xform.borrow_mut();
*xform = Matrix::multiply(
&Matrix::multiply(
&Matrix::new(1.0, 0.0, 0.0, 1.0, -board_center.x(), -board_center.y()),
&Matrix::new(f, 0.0, 0.0, f, 0.0, 0.0),
),
&Matrix::new(1.0, 0.0, 0.0, 1.0, screen_center.x(), screen_center.y()),
);
cr.set_matrix(*xform);
// Loop over rows and columns to draw each chessboard cell.
for row in 0..DraughtsBoard::rows() {
for col in 0..DraughtsBoard::columns() {
let position = match current_player {
Player::White => Position::new((8 - row - 1) as u8, col as u8),
Player::Red => Position::new(row as u8, col as u8),
};
let square = Rectangle::new(
col as f64 * SQUARE_SIZE,
row as f64 * SQUARE_SIZE,
SQUARE_SIZE,
SQUARE_SIZE,
);
cr.save().unwrap();
// Alternate colors based on the sum of row and column indices.
if (row + col) % 2 == 0 {
cr.set_source_rgb(0.8, 0.8, 0.6);
} else {
cr.set_source_rgb(0.4, 0.4, 0.2);
}
// Draw and fill the square.
cr.rectangle(
square.tl().x(),
square.tl().y(),
square.width(),
square.height(),
);
cr.fill().unwrap();
draw_piece(
cr,
&square,
draughts_game.borrow().piece_at(position),
&crown_red_handle,
&crown_white_handle,
)
.unwrap();
cr.restore().unwrap();
}
}
if let Some(selected_position) = selected_piece.get() {
let screen_position = match current_player {
Player::White => {
Position::new(8 - 1 - selected_position.row(), selected_position.col())
}
Player::Red => selected_position,
};
let square = Rectangle::new(
screen_position.col() as f64 * SQUARE_SIZE,
screen_position.row() as f64 * SQUARE_SIZE,
SQUARE_SIZE,
SQUARE_SIZE,
);
cr.save().unwrap();
cr.new_path();
cr.move_to(square.tl().x(), square.tl().y());
cr.line_to(square.tl().x(), square.br().y());
cr.line_to(square.br().x(), square.br().y());
cr.line_to(square.br().x(), square.tl().y());
cr.line_to(square.tl().x(), square.tl().y());
cr.clip();
cr.new_path();
cr.set_source_rgb(0.0, 0.0, 1.0);
cr.set_line_width((square.width() + square.height()) * 0.05);
cr.move_to(square.tl().x(), square.tl().y());
cr.line_to(square.tl().x(), square.br().y());
cr.line_to(square.br().x(), square.br().y());
cr.line_to(square.br().x(), square.tl().y());
cr.line_to(square.tl().x(), square.tl().y());
cr.stroke().unwrap();
cr.restore().unwrap();
}
let am = available_moves.borrow();
if !am.is_empty() {
for mv in am.iter() {
let end_pos = mv.get_end_position();
let screen_position = match current_player {
Player::White => Position::new(8 - 1 - end_pos.row(), end_pos.col()),
Player::Red => end_pos,
};
let square = Rectangle::new(
screen_position.col() as f64 * SQUARE_SIZE,
screen_position.row() as f64 * SQUARE_SIZE,
SQUARE_SIZE,
SQUARE_SIZE,
);
cr.save().unwrap();
cr.new_path();
cr.move_to(square.tl().x(), square.tl().y());
cr.line_to(square.tl().x(), square.br().y());
cr.line_to(square.br().x(), square.br().y());
cr.line_to(square.br().x(), square.tl().y());
cr.line_to(square.tl().x(), square.tl().y());
cr.clip();
cr.new_path();
cr.set_source_rgb(0.0, 1.0, 0.0);
cr.set_line_width((square.width() + square.height()) * 0.05);
cr.move_to(square.tl().x(), square.tl().y());
cr.line_to(square.tl().x(), square.br().y());
cr.line_to(square.br().x(), square.br().y());
cr.line_to(square.br().x(), square.tl().y());
cr.line_to(square.tl().x(), square.tl().y());
cr.stroke().unwrap();
cr.restore().unwrap();
}
}
draw_score_bar(cr, &board, &draughts_game.borrow(), current_player);
});
}
let gesture = gtk::GestureClick::new();
// Set the gestures button to the right mouse button (=3)
gesture.set_button(GDK_BUTTON_PRIMARY as u32);
// Assign your handler to an event of the gesture (e.g. the `pressed` event)
{
let drawing_area = drawing_area.clone();
let available_moves = available_moves.clone();
let window = window.clone();
gesture.connect_pressed(move |gesture, _, x, y| {
gesture.set_state(gtk::EventSequenceState::Claimed);
if let Some(winner) = draughts_game.borrow().winner() {
MainContext::default()
.spawn_local(final_dialog::create_dialog(window.clone(), winner));
} else {
let xform = xform.borrow();
let inverse = {
let mut m = *xform;
m.invert();
m
};
let p = transform_point(&Point::new(x, y), &inverse);
if board_clone.contains(&p) {
let p = &p - &board_clone.tl();
// println!("Point: {:?}", p);
let position = match current_player {
Player::White => Position::new(
(8.0 - (p.y() / SQUARE_SIZE)) as u8,
(p.x() / SQUARE_SIZE) as u8,
),
Player::Red => {
Position::new((p.y() / SQUARE_SIZE) as u8, (p.x() / SQUARE_SIZE) as u8)
}
};
// println!("Selected position: {:?}", position);
let mut draughts_game = draughts_game.borrow_mut();
let piece = draughts_game.piece_at(position);
// println!("Selected piece: {:?}", piece);
let mut am = available_moves.borrow_mut();
let mut move_applied = false;
if !am.is_empty() {
for mv in am.iter() {
if mv.get_end_position() == position {
draughts_game.apply_move(mv).unwrap();
let game_copy = draughts_game.clone();
// thread::spawn(move || {
// if let (Some(mv), analyzed_moves) = game_copy.get_best_move(10) {
// println!(
// "Next best move: {:?}, analyzed moves: {}",
// mv, analyzed_moves
// );
// }
// });
move_applied = true;
break;
}
}
if move_applied {
selected_piece.set(None);
am.clear();
}
}
if !move_applied {
match piece.player() {
Some(Player::Red) => selected_piece.set(Some(position)),
Some(Player::White) => selected_piece.set(Some(position)),
None => selected_piece.set(None),
}
am.clear();
if piece.player().is_none() {
selected_piece.set(None)
} else {
selected_piece.set(Some(position));
for mv in draughts_game.moves_for_piece(position) {
am.push(mv);
}
}
}
} else {
selected_piece.set(None);
}
drawing_area.queue_draw();
}
});
}
// Assign the gesture to the treeview
drawing_area.add_controller(gesture);
window.present();
}
fn on_activate(application: &Application) {
// Initialize GTK before using any GTK functions.
if gtk::init().is_err() {
panic!("Failed to initialize GTK.");
}
let current_player = new_shared_mut(Player::Red);
let dialog = greeting_dialog::create(application, current_player.clone());
let application = application.clone();
dialog.connect_close_request(move |w| {
application.remove_window(w);
create_game_window(&application, current_player.get());
Propagation::Proceed
});
}
fn main() {
// Create a new application with the builder pattern
let app = Application::builder()
.application_id("net.woggioni.rdraught")
.build();
app.connect_activate(on_activate);
// Run the application
app.run();
fn main() -> ExitCode {
let game = DraughtsGame::default();
rdraught_ui::run(game)
}

551
rdraught-ui/src/rdraught_application.rs Normal file
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@@ -0,0 +1,551 @@
use super::geo2d::Point;
use core::f64::consts::PI;
use gdk4::cairo::{Context as CairoContext, Matrix, Rectangle};
use glib::ExitCode;
use gtk4::glib::{MainContext, Propagation};
use gtk4::{self as gtk, gdk::ffi::GDK_BUTTON_PRIMARY};
use gtk4::{Application, DrawingArea, prelude::*};
use rdraught::{
DraughtsBoard, DraughtsGame, Error, Move, Piece, Player, Position, RDraughtApplication,
RectangularBoard,
};
use rsvg::SvgHandle;
use std::thread;
const SQUARE_SIZE: f64 = 1.0;
use super::final_dialog;
use super::greeting_dialog;
use super::types;
use types::{SharedMutable, SharedMutableRef, new_shared_mut, new_shared_mut_ref};
const CROWN_RED: &[u8] = include_bytes!("crown_red.svg");
const CROWN_WHITE: &[u8] = include_bytes!("crown_white.svg");
fn transform_point(p: &Point, m: &Matrix) -> Point {
let (x, y) = m.transform_point(p.x(), p.y());
Point::new(x, y)
}
trait AugmentedRect {
fn from_points(tl: Point, br: Point) -> Rectangle;
fn center(&self) -> Point;
fn tl(&self) -> Point;
fn br(&self) -> Point;
fn contains(&self, p: &Point) -> bool;
}
impl AugmentedRect for Rectangle {
fn center(&self) -> Point {
Point::new(
self.x() + self.width() / 2.0,
self.y() + self.height() / 2.0,
)
}
fn tl(&self) -> Point {
Point::new(self.x(), self.y())
}
fn br(&self) -> Point {
Point::new(self.x() + self.width(), self.y() + self.height())
}
fn from_points(tl: Point, br: Point) -> Rectangle {
Rectangle::new(tl.x(), tl.y(), br.x() - tl.x(), br.y() - tl.y())
}
fn contains(&self, p: &Point) -> bool {
self.x() < p.x()
&& self.x() + self.width() > p.x()
&& self.y() < p.y()
&& self.y() + self.height() > p.y()
}
}
fn draw_piece(
cr: &CairoContext,
square: &Rectangle,
piece: Piece,
crown_red: &SvgHandle,
crown_white: &SvgHandle,
) -> Result<(), cairo::Error> {
if let Piece::NoPiece = piece {
Ok(())
} else {
cr.save()?;
let center = square.center();
let outer_radius = square.width() * 0.3;
let vertical_scale_factor = 0.8;
let matrix = {
let mut m1 = Matrix::identity();
m1.translate(0.0, -(center.y() - outer_radius));
let mut m2 = Matrix::identity();
m2.scale(1.0, vertical_scale_factor);
let mut m3 = Matrix::identity();
m3.translate(0.0, center.y() - outer_radius * vertical_scale_factor);
Matrix::multiply(&Matrix::multiply(&m1, &m2), &m3)
};
cr.set_matrix(Matrix::multiply(&matrix, &cr.matrix()));
cr.set_source_rgb(0.0, 0.0, 0.0);
let thickness = outer_radius * 0.3;
cr.arc(
center.x(),
center.y() + thickness / 2.0,
outer_radius,
0.0,
2.0 * PI,
);
cr.rectangle(
center.x() - outer_radius,
center.y() - thickness / 2.0,
outer_radius * 2.0,
thickness,
);
cr.arc(
center.x(),
center.y() - thickness / 2.0,
outer_radius,
0.0,
2.0 * PI,
);
cr.fill().unwrap();
let (color, crowned) = match piece {
Piece::NoPiece => return Ok(()),
Piece::SimpleRedPawn => ((1.0, 0.0, 0.0), false),
Piece::SimpleWhitePawn => ((1.0, 1.0, 1.0), false),
Piece::CrownedRedPawn => ((1.0, 0.0, 0.0), true),
Piece::CrownedWhitePawn => ((1.0, 1.0, 1.0), true),
};
let radius = square.width() * 0.275;
cr.set_source_rgb(color.0, color.1, color.2);
cr.arc(
center.x(),
center.y() - thickness / 2.0,
radius,
0.0,
2.0 * PI,
);
cr.fill()?;
cr.restore()?;
if crowned {
let renderer = match piece.player() {
Some(Player::Red) => rsvg::CairoRenderer::new(crown_red),
Some(Player::White) => rsvg::CairoRenderer::new(crown_white),
None => panic!("This should never happen"),
};
let m4 = {
let mut m1 = Matrix::identity();
m1.translate(-center.x(), -(center.y() - thickness / 1.0));
let mut m2 = Matrix::identity();
m2.scale(0.5, 0.5);
let mut m3 = Matrix::identity();
m3.translate(center.x(), center.y() - thickness / 1.0);
Matrix::multiply(&Matrix::multiply(&m1, &m2), &m3)
};
cr.set_matrix(Matrix::multiply(
&Matrix::multiply(&matrix, &m4),
&cr.matrix(),
));
renderer
.render_document(
cr,
&cairo::Rectangle::new(
square.tl().x(),
square.tl().y(),
square.width(),
square.height(),
),
)
.unwrap();
}
Ok(())
}
}
fn draw_score_bar(
cr: &CairoContext,
board: &Rectangle,
draughts_game: &DraughtsGame,
current_player: Player,
) {
fn modulate_score(relative_score: f64) -> f64 {
let x = relative_score;
1.0 - (f64::atan(8.0 * x - 4.0) / f64::atan(4.0) / 2.0 + 0.5)
}
let score_bar = Rectangle::new(
board.tl().x() - board.width() / 10.0,
board.tl().y(),
board.width() / 16.0,
board.height(),
);
let num_rects = 40usize;
let spacing = board.height() / 200.0;
let rect_height = (board.height() - spacing * (num_rects - 1) as f64) / (num_rects as f64);
let score_percentage = modulate_score(draughts_game.relative_score(current_player) as f64);
let threshold = (score_percentage * num_rects as f64) as usize;
let tl = score_bar.tl();
cr.save().unwrap();
cr.set_line_width(spacing / 4.0);
for i in 0..threshold {
match current_player {
Player::White => cr.set_source_rgb(1.0, 0.0, 0.0),
Player::Red => cr.set_source_rgb(1.0, 1.0, 1.0),
}
cr.rectangle(
tl.x(),
tl.y() + i as f64 * (rect_height + spacing),
score_bar.width(),
rect_height,
);
cr.fill().unwrap();
cr.set_source_rgb(0.0, 0.0, 0.0);
cr.rectangle(
tl.x(),
tl.y() + i as f64 * (rect_height + spacing),
score_bar.width(),
rect_height,
);
cr.stroke().unwrap();
}
for i in threshold..num_rects {
match current_player {
Player::White => cr.set_source_rgb(1.0, 1.0, 1.0),
Player::Red => cr.set_source_rgb(1.0, 0.0, 0.0),
}
cr.rectangle(
tl.x(),
tl.y() + i as f64 * (rect_height + spacing),
score_bar.width(),
rect_height,
);
cr.fill().unwrap();
cr.set_source_rgb(0.0, 0.0, 0.0);
cr.rectangle(
tl.x(),
tl.y() + i as f64 * (rect_height + spacing),
score_bar.width(),
rect_height,
);
cr.stroke().unwrap();
}
cr.restore().unwrap();
}
fn create_game_window(
rd: SharedMutableRef<RDraughtApplication>,
application: &Application,
current_player: Player,
) {
// Create a new window.
let window = gtk::ApplicationWindow::builder()
.application(application)
.title("Rdraught")
.default_width(800)
.default_height(800)
.build();
// Create a DrawingArea widget where we will draw the chessboard.
let drawing_area = DrawingArea::new();
// Add the drawing area to the window.
window.set_child(Some(&drawing_area));
let selected_piece: SharedMutable<Option<Position>> = new_shared_mut(None);
let available_moves = new_shared_mut_ref(Vec::<Move>::new());
// Get the allocation information for the widget.
let board_width = SQUARE_SIZE * DraughtsBoard::rows() as f64;
let board_height = SQUARE_SIZE * DraughtsBoard::columns() as f64;
let board = Rectangle::from_points(Point::new(0.0, 0.0), Point::new(board_width, board_height));
let board_with_bar = Rectangle::from_points(
Point::new(-board_width / 10.0, 0.0),
Point::new(board_width, board_height),
);
let board_clone = board;
let crown_red_handle = {
let stream = gio::MemoryInputStream::from_bytes(&glib::Bytes::from_static(CROWN_RED));
rsvg::Loader::new()
.read_stream(
&stream,
None::<&gio::File>, // no base file as this document has no references
None::<&gio::Cancellable>, // no cancellable
)
.unwrap()
};
let crown_white_handle = {
let stream = gio::MemoryInputStream::from_bytes(&glib::Bytes::from_static(CROWN_WHITE));
rsvg::Loader::new()
.read_stream(
&stream,
None::<&gio::File>, // no base file as this document has no references
None::<&gio::Cancellable>, // no cancellable
)
.unwrap()
};
let xform = new_shared_mut_ref(Matrix::identity());
// Set the "draw" function of the drawing area. This callback is called
// whenever GTK needs to redraw this widget (for example, on first display or when resized).
{
let rd = rd.clone();
let xform = xform.clone();
let selected_piece = selected_piece.clone();
let available_moves = available_moves.clone();
drawing_area.set_draw_func(move |_widget, cr, width, height| {
let screen = Rectangle::from_points(
Point::new(0.0, 0.0),
Point::new(width as f64, height as f64),
);
let f = f64::min(
screen.width() / board_with_bar.width(),
screen.height() / board_with_bar.height(),
);
let screen_center = screen.center();
let board_center = board_with_bar.center();
let mut xform = xform.borrow_mut();
*xform = Matrix::multiply(
&Matrix::multiply(
&Matrix::new(1.0, 0.0, 0.0, 1.0, -board_center.x(), -board_center.y()),
&Matrix::new(f, 0.0, 0.0, f, 0.0, 0.0),
),
&Matrix::new(1.0, 0.0, 0.0, 1.0, screen_center.x(), screen_center.y()),
);
cr.set_matrix(*xform);
// Loop over rows and columns to draw each chessboard cell.
for row in 0..DraughtsBoard::rows() {
for col in 0..DraughtsBoard::columns() {
let position = match current_player {
Player::Red => Position::new(row as u8, (8 - 1 - col) as u8),
Player::White => Position::new((8 - 1 - row) as u8, col as u8),
};
let square = Rectangle::new(
col as f64 * SQUARE_SIZE,
row as f64 * SQUARE_SIZE,
SQUARE_SIZE,
SQUARE_SIZE,
);
cr.save().unwrap();
// Alternate colors based on the sum of row and column indices.
if (row + col) % 2 == 0 {
cr.set_source_rgb(0.8, 0.8, 0.6);
} else {
cr.set_source_rgb(0.4, 0.4, 0.2);
}
// Draw and fill the square.
cr.rectangle(
square.tl().x(),
square.tl().y(),
square.width(),
square.height(),
);
cr.fill().unwrap();
draw_piece(
cr,
&square,
position.map_or(Piece::NoPiece, |p| rd.borrow().game().piece_at(p)),
&crown_red_handle,
&crown_white_handle,
)
.unwrap();
cr.restore().unwrap();
}
}
if let Some(selected_position) = selected_piece.get() {
let screen_position = match current_player {
Player::White => (8 - 1 - selected_position.row(), selected_position.col()),
Player::Red => (selected_position.row(), 8 - 1 - selected_position.col()),
};
let square = Rectangle::new(
screen_position.1 as f64 * SQUARE_SIZE,
screen_position.0 as f64 * SQUARE_SIZE,
SQUARE_SIZE,
SQUARE_SIZE,
);
cr.save().unwrap();
cr.new_path();
cr.move_to(square.tl().x(), square.tl().y());
cr.line_to(square.tl().x(), square.br().y());
cr.line_to(square.br().x(), square.br().y());
cr.line_to(square.br().x(), square.tl().y());
cr.line_to(square.tl().x(), square.tl().y());
cr.clip();
cr.new_path();
cr.set_source_rgb(0.0, 0.0, 1.0);
cr.set_line_width((square.width() + square.height()) * 0.035);
cr.move_to(square.tl().x(), square.tl().y());
cr.line_to(square.tl().x(), square.br().y());
cr.line_to(square.br().x(), square.br().y());
cr.line_to(square.br().x(), square.tl().y());
cr.line_to(square.tl().x(), square.tl().y());
cr.stroke().unwrap();
cr.restore().unwrap();
}
let am = available_moves.borrow();
if !am.is_empty() {
for mv in am.iter() {
let end_pos = mv.get_end_position();
let screen_position = match current_player {
Player::White => (8 - 1 - end_pos.row(), end_pos.col()),
Player::Red => (end_pos.row(), 8 - 1 - end_pos.col()),
};
let square = Rectangle::new(
screen_position.1 as f64 * SQUARE_SIZE,
screen_position.0 as f64 * SQUARE_SIZE,
SQUARE_SIZE,
SQUARE_SIZE,
);
cr.save().unwrap();
cr.new_path();
cr.move_to(square.tl().x(), square.tl().y());
cr.line_to(square.tl().x(), square.br().y());
cr.line_to(square.br().x(), square.br().y());
cr.line_to(square.br().x(), square.tl().y());
cr.line_to(square.tl().x(), square.tl().y());
cr.clip();
cr.new_path();
cr.set_source_rgb(0.0, 1.0, 0.0);
cr.set_line_width((square.width() + square.height()) * 0.035);
cr.move_to(square.tl().x(), square.tl().y());
cr.line_to(square.tl().x(), square.br().y());
cr.line_to(square.br().x(), square.br().y());
cr.line_to(square.br().x(), square.tl().y());
cr.line_to(square.tl().x(), square.tl().y());
cr.stroke().unwrap();
cr.restore().unwrap();
}
}
draw_score_bar(cr, &board, rd.borrow().game(), current_player);
});
}
let gesture = gtk::GestureClick::new();
// Set the gestures button to the right mouse button (=3)
gesture.set_button(GDK_BUTTON_PRIMARY as u32);
// Assign your handler to an event of the gesture (e.g. the `pressed` event)
{
let drawing_area = drawing_area.clone();
let available_moves = available_moves.clone();
let window = window.clone();
gesture.connect_pressed(move |gesture, _, x, y| {
gesture.set_state(gtk::EventSequenceState::Claimed);
if let Some(winner) = rd.borrow().game().winner() {
MainContext::default()
.spawn_local(final_dialog::create_dialog(window.clone(), winner));
} else {
let xform = xform.borrow();
let inverse = {
let mut m = *xform;
m.invert();
m
};
let p = transform_point(&Point::new(x, y), &inverse);
if board_clone.contains(&p) {
let p = &p - &board_clone.tl();
// println!("Point: {:?}", p);
let position = match current_player {
Player::White => Position::new(
(8.0 - (p.y() / SQUARE_SIZE)) as u8,
(p.x() / SQUARE_SIZE) as u8,
),
Player::Red => Position::new(
(p.y() / SQUARE_SIZE) as u8,
(8.0 - p.x() / SQUARE_SIZE) as u8,
),
};
println!("Selected position: {:?}", position);
let piece = {
let rd = rd.borrow();
let draughts_game = rd.game();
position
.clone()
.map_or(Piece::NoPiece, |it| draughts_game.piece_at(it))
// println!("Selected piece: {:?}", piece);
};
let am = available_moves.replace(Vec::new());
let mut move_applied = false;
if !am.is_empty() {
if let Ok(pos) = position {
for mv in am.into_iter() {
if mv.get_end_position() == pos {
let mut rd_app = rd.borrow_mut();
println!("Applied move: {:?}", mv);
rd_app.apply_move(mv).unwrap();
let game_copy = rd_app.game().clone();
thread::spawn(move || {
if let (Some(mv), analyzed_moves) =
game_copy.get_best_move(10)
{
println!(
"Next best move: {:?}, analyzed moves: {}",
mv, analyzed_moves
);
}
});
move_applied = true;
break;
}
}
}
if move_applied {
selected_piece.set(None);
}
}
if !move_applied {
let position = position.ok();
match piece.player() {
Some(Player::Red) => selected_piece.set(position),
Some(Player::White) => selected_piece.set(position),
None => selected_piece.set(None),
}
if piece.player().is_none() {
selected_piece.set(None)
} else {
let mut am = available_moves.borrow_mut();
selected_piece.set(position);
if let Some(position) = position {
for mv in rd.borrow().game().moves_for_piece(position) {
am.push(mv);
}
}
}
}
} else {
selected_piece.set(None);
}
drawing_area.queue_draw();
}
});
}
// Assign the gesture to the treeview
drawing_area.add_controller(gesture);
window.present();
}
fn on_activate(application: &Application, game: DraughtsGame) {
// Initialize GTK before using any GTK functions.
if gtk::init().is_err() {
panic!("Failed to initialize GTK.");
}
let current_player = new_shared_mut(Player::Red);
let dialog = greeting_dialog::create(application, current_player.clone());
let application = application.clone();
dialog.connect_close_request(move |w| {
application.remove_window(w);
let rd = new_shared_mut_ref(RDraughtApplication::new(game.clone()));
create_game_window(rd.clone(), &application, current_player.get());
Propagation::Proceed
});
}
pub fn run(game: DraughtsGame) -> ExitCode {
// Create a new application with the builder pattern
let app = Application::builder()
.application_id("net.woggioni.rdraught")
.build();
app.connect_activate(move |it| on_activate(it, game.clone()));
app.run()
}

8
rdraught/Cargo.toml
View File

@@ -13,7 +13,9 @@ name = "rdraught"
crate-type = ["lib"]
[dependencies]
heapless = "0.8"
heapless.workspace = true
strum.workspace = true
strum_macros.workspace = true
[dev-dependencies]
rand = "0.9"
[features]
std = []

131
rdraught/src/board.rs
View File

@@ -1,131 +0,0 @@
use core::iter::Enumerate;
use core::iter::Flatten;
use core::ops::Index;
use core::ops::IndexMut;
use super::position::Position;
pub trait RectangularBoard {
fn rows() -> usize;
fn columns() -> usize;
}
#[derive(Debug, Clone)]
pub(crate) struct Board<TYPE, const ROWS: usize, const COLUMNS: usize> {
data: [[TYPE; COLUMNS]; ROWS],
}
impl<TYPE, const ROWS: usize, const COLUMNS: usize> RectangularBoard
for Board<TYPE, ROWS, COLUMNS>
{
fn rows() -> usize {
ROWS
}
fn columns() -> usize {
COLUMNS
}
}
impl<TYPE, const ROWS: usize, const COLUMNS: usize> Default for Board<TYPE, ROWS, COLUMNS>
where
TYPE: Default,
{
fn default() -> Self {
Self::new(|_| TYPE::default())
}
}
impl<TYPE, const ROWS: usize, const COLUMNS: usize> IntoIterator for Board<TYPE, ROWS, COLUMNS> {
type Item = (usize, usize, TYPE);
type IntoIter = BoardIterator<TYPE, ROWS, COLUMNS>;
fn into_iter(self) -> Self::IntoIter {
BoardIterator {
it: self.data.into_iter().flatten().enumerate(),
}
}
}
pub struct BoardIteratorRef<'a, TYPE, const ROWS: usize, const COLUMNS: usize> {
it: Enumerate<Flatten<core::slice::Iter<'a, [TYPE; COLUMNS]>>>,
}
impl<'a, TYPE, const ROWS: usize, const COLUMNS: usize> Iterator
for BoardIteratorRef<'a, TYPE, ROWS, COLUMNS>
where
TYPE: Clone + Copy,
{
fn next(&mut self) -> Option<Self::Item> {
self.it
.next()
.map(|(index, value)| (index / COLUMNS, index % COLUMNS, *value))
}
type Item = (usize, usize, TYPE);
}
impl<'a, TYPE, const ROWS: usize, const COLUMNS: usize> IntoIterator
for &'a Board<TYPE, ROWS, COLUMNS>
where
TYPE: Clone + Copy,
{
fn into_iter(self) -> BoardIteratorRef<'a, TYPE, ROWS, COLUMNS> {
BoardIteratorRef {
it: (self.data).iter().flatten().enumerate(),
}
}
type IntoIter = BoardIteratorRef<'a, TYPE, ROWS, COLUMNS>;
type Item = (usize, usize, TYPE);
}
impl<TYPE, const ROWS: usize, const COLUMNS: usize> Board<TYPE, ROWS, COLUMNS> {
pub(crate) fn new<INITIALIZER>(mut cb: INITIALIZER) -> Self
where
INITIALIZER: FnMut((usize, usize)) -> TYPE,
{
let values: [[TYPE; COLUMNS]; ROWS] =
core::array::from_fn(|i| core::array::from_fn(|j| cb((i, j))));
Board { data: values }
}
pub(crate) fn iter(&self) -> BoardIteratorRef<'_, TYPE, ROWS, COLUMNS> {
BoardIteratorRef {
it: (self.data).iter().flatten().enumerate(),
}
}
}
pub struct BoardIterator<TYPE, const ROWS: usize, const COLUMNS: usize> {
it: Enumerate<Flatten<core::array::IntoIter<[TYPE; COLUMNS], ROWS>>>,
}
impl<TYPE, const ROWS: usize, const COLUMNS: usize> Iterator
for BoardIterator<TYPE, ROWS, COLUMNS>
{
fn next(&mut self) -> Option<Self::Item> {
self.it
.next()
.map(|(index, value)| (index / COLUMNS, index % COLUMNS, value))
}
type Item = (usize, usize, TYPE);
}
impl<TYPE, const ROWS: usize, const COLUMNS: usize> Index<Position> for Board<TYPE, ROWS, COLUMNS> {
type Output = TYPE;
fn index(&self, position: Position) -> &Self::Output {
let index = position.to_index();
&self.data[index.1][index.0]
}
}
impl<TYPE, const ROWS: usize, const COLUMNS: usize> IndexMut<Position>
for Board<TYPE, ROWS, COLUMNS>
{
fn index_mut(&mut self, position: Position) -> &mut Self::Output {
let index = position.to_index();
&mut self.data[index.1][index.0]
}
}

3
rdraught/src/constants.rs Normal file
View File

@@ -0,0 +1,3 @@
pub const BITS_PER_POSITION: usize = 3;
pub const POSITIONS: usize = 32;
pub const POSITIONS_PER_ROW: usize = 4;

794
rdraught/src/draughts.rs
View File

@@ -1,58 +1,214 @@
use super::board::Board;
use super::board::RectangularBoard;
use core::ops::Index;
use core::ops::IndexMut;
use core::result;
use heapless::BinaryHeap;
use heapless::Vec;
use super::constants::{BITS_PER_POSITION, POSITIONS, POSITIONS_PER_ROW};
use super::movement::{Move, MoveDirection};
use super::position::Position;
use crate::piece::Piece;
use crate::player::Player;
use heapless::{HistoryBuffer, Vec};
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub enum Player {
White = 0,
Red = 1,
pub trait RectangularBoard {
fn rows() -> usize;
fn columns() -> usize;
}
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub enum Piece {
NoPiece = 0,
SimpleRedPawn = 1,
CrownedRedPawn = 3,
SimpleWhitePawn = 2,
CrownedWhitePawn = 4,
#[derive(Debug, Clone, Eq, PartialEq)]
pub struct DraughtsBoard {
data: [u8; (POSITIONS * BITS_PER_POSITION + 7) / 8],
}
impl Piece {
pub fn player(&self) -> Option<Player> {
if self.is_present() && (*self as u32) % 2 == 1 {
Some(Player::Red)
} else if self.is_present() && (*self as u32) % 2 == 0 {
Some(Player::White)
impl DraughtsBoard {
fn offset_bits(p: Position) -> usize {
(p.row() as usize * POSITIONS_PER_ROW + (p.col() / 2) as usize) * BITS_PER_POSITION
}
fn set(&mut self, position: Position, piece: Piece) {
let offset_bits = DraughtsBoard::offset_bits(position);
let index = offset_bits / 8;
let remainder = offset_bits % 8;
let determinant = piece as u8;
self.data[index] = (self.data[index] & !(7 << remainder)) | (determinant << remainder);
if remainder > 5 {
let written_bits = 8 - remainder;
self.data[index + 1] =
self.data[index + 1] & !(7 >> written_bits) | (determinant >> written_bits);
}
}
pub fn get(&self, position: Position) -> Piece {
let offset_bits = DraughtsBoard::offset_bits(position);
let index = offset_bits / 8;
let remainder = offset_bits % 8;
let mut value = 0;
value = value | ((self.data[index] >> remainder) & 7);
if remainder > 5 {
let written_bits = 8 - remainder;
value = value | ((self.data[index + 1] & (7 >> written_bits)) << written_bits)
}
Piece::from_repr(value as usize).unwrap()
}
pub fn new<T: FnMut(Position) -> Piece>(mut cb: T) -> DraughtsBoard {
let mut result = DraughtsBoard {
data: [0u8; (POSITIONS * BITS_PER_POSITION + 7) / 8],
};
for i in 0..DraughtsBoard::rows() {
for j in 0..DraughtsBoard::columns() {
if (i + j) % 2 == 0 {
let position = Position::new(i as u8, j as u8).unwrap();
let piece = cb(position.clone());
result.set(position, piece);
}
}
}
result
}
pub fn pieces<const PIECES: usize>(
&self,
pieces: Vec<Piece, PIECES>,
) -> impl Iterator<Item = Position> {
self.iter()
.filter(move |(_, piece)| {
for p in &pieces {
if piece == p {
return true;
}
}
false
})
.map(|(pos, _)| Position::new(pos.row(), pos.col()).unwrap())
}
fn is_position_valid(position: Position) -> bool {
let position = position.to_index();
position.0 < DraughtsBoard::rows() && position.1 < DraughtsBoard::columns()
}
fn get_piece(&self, p: &Position) -> Piece {
self.get(*p)
}
fn check_move_valid(&self, mv: &Move) -> Result<(), Error> {
let start = mv.start_position();
if mv.is_movement() {
let mut move_is_possible = false;
for possible_move in self.moves_for_piece(start, false) {
if possible_move.is_capture() {
// Capture is mandatory
return Err(Error::MovementInsteadOfCapture);
}
if possible_move == *mv {
move_is_possible = true;
}
}
if move_is_possible {
Ok(())
} else {
None
Err(Error::InvalidMove)
}
} else {
let mut move_is_possible = false;
for possible_move in self.moves_for_piece(start, true) {
if possible_move == *mv {
move_is_possible = true;
}
}
if move_is_possible {
Ok(())
} else {
Err(Error::InvalidMove)
}
}
}
fn is_present(&self) -> bool {
*self != Piece::NoPiece
fn apply_move(&mut self, mv: &Move) -> Result<(), Error> {
let start = mv.start_position();
let piece = self.get_piece(&start);
if let Piece::NoPiece = piece {
Err(Error::InvalidMove)
} else {
let player = piece.player().unwrap();
if mv.is_movement() {
let end = mv.get_end_position();
// Make sure the move ends in a vlid position
if !DraughtsBoard::is_position_valid(end) {
return Err(Error::InvalidMove);
}
let piece_at_destination = self.get(mv.get_end_position());
// Make sure there is no piece at destination
if let Piece::NoPiece = piece_at_destination {
self.set(start, Piece::NoPiece);
self.set(end, piece);
} else {
return Err(Error::InvalidMove);
}
} else {
let end = mv.get_end_position();
// Make sure the move ends in a valid position
if !DraughtsBoard::is_position_valid(end) {
return Err(Error::InvalidMove);
}
let piece_at_destination = self.get(mv.get_end_position());
// Make sure there is no piece at destination
if let Piece::NoPiece = piece_at_destination {
let captured = self.get((end + start) / (2, 2));
// Make sure there is a piece to be captured
if let Piece::NoPiece = captured {
return Err(Error::InvalidMove);
}
// Make sure the captured piece belongs to the opposite player
if let Some(captured_piece_player) = captured.player() {
if captured_piece_player != player {
self.set(start, Piece::NoPiece);
self.set(end, piece);
self.set((end + start) / (2, 2), Piece::NoPiece);
} else {
return Err(Error::InvalidMove);
}
} else {
return Err(Error::InvalidMove);
}
} else {
return Err(Error::InvalidMove);
}
};
Ok(())
}
}
fn is_crowned(&self) -> bool {
(*self as u32) > 2
pub fn moves_for_piece<'a>(
&'a self,
position: Position,
captures_only: bool,
) -> MoveIterator<'a> {
let piece = self.get(position);
match piece.player() {
Some(_) => MoveIterator::new(self, position, captures_only),
None => MoveIterator::empty_iterator(self),
}
}
fn can_move_backward(&self) -> bool {
self.is_crowned()
fn iter<'a>(&'a self) -> BoardIterator<'a> {
BoardIterator {
board: self,
index: 0u8,
}
}
}
#[derive(Debug, Clone)]
pub struct DraughtsBoard(Board<Piece, 8, 8>);
impl RectangularBoard for DraughtsBoard {
fn rows() -> usize {
8
}
fn columns() -> usize {
8
}
}
impl Default for DraughtsBoard {
fn default() -> DraughtsBoard {
DraughtsBoard(Board::<Piece, 8usize, 8usize>::new(|(i, j)| {
DraughtsBoard::new(|p| {
let (i, j) = (p.row(), p.col());
if i < 3 {
if (i + j) % 2 == 0 {
Piece::SimpleWhitePawn
@@ -68,188 +224,49 @@ impl Default for DraughtsBoard {
} else {
Piece::NoPiece
}
}))
}
}
impl Index<Position> for DraughtsBoard {
type Output = Piece;
fn index(&self, position: Position) -> &Self::Output {
&self.0[position]
}
}
impl IndexMut<Position> for DraughtsBoard {
fn index_mut(&mut self, position: Position) -> &mut Self::Output {
&mut self.0[position]
}
}
impl RectangularBoard for DraughtsBoard {
fn rows() -> usize {
Board::<Piece, 8, 8>::rows()
}
fn columns() -> usize {
Board::<Piece, 8, 8>::columns()
}
}
impl DraughtsBoard {
pub fn rows() -> usize {
Board::<Piece, 8, 8>::rows()
}
pub fn columns() -> usize {
Board::<Piece, 8, 8>::columns()
}
pub fn pieces<const PIECES: usize>(
&self,
pieces: Vec<Piece, PIECES>,
) -> impl Iterator<Item = Position> {
self.0
.iter()
.filter(move |(_, _, piece)| {
for p in &pieces {
if piece == p {
return true;
}
}
false
})
.map(|(row, col, _)| Position::new(row as u8, col as u8))
}
fn is_position_valid(position: Position) -> bool {
let position = position.to_index();
position.0 < DraughtsBoard::rows() && position.1 < DraughtsBoard::columns()
}
fn get_piece(&self, p: &Position) -> Piece {
self[*p]
}
fn check_move_valid(&self, mv: &Move) -> Result<(), Error> {
let start = mv.get_start_position();
match mv {
Move::Movement { .. } => {
let mut move_is_possible = false;
for possible_move in self.moves_for_piece(start, false) {
if let Move::Capture { .. } = possible_move {
// Capture is mandatory
return Err(Error::MovementInsteadOfCapture);
}
if possible_move == *mv {
move_is_possible = true;
}
}
if move_is_possible {
Ok(())
} else {
Err(Error::InvalidMove)
}
}
Move::Capture { .. } => {
let mut move_is_possible = false;
for possible_move in self.moves_for_piece(start, true) {
if possible_move == *mv {
move_is_possible = true;
}
}
if move_is_possible {
Ok(())
} else {
Err(Error::InvalidMove)
}
}
}
}
fn apply_move(&mut self, mv: &Move) -> Result<(), Error> {
let start = mv.get_start_position();
let piece = self.get_piece(&start);
if let Piece::NoPiece = piece {
Err(Error::InvalidMove)
} else {
let player = piece.player().unwrap();
match mv {
Move::Movement { .. } => {
let end = mv.get_end_position();
// Make sure the move ends in a vlid position
if !DraughtsBoard::is_position_valid(end) {
return Err(Error::InvalidMove);
}
let piece_at_destination = self[mv.get_end_position()];
// Make sure there is no piece at destination
if let Piece::NoPiece = piece_at_destination {
self[start] = Piece::NoPiece;
self[end] = piece;
} else {
return Err(Error::InvalidMove);
}
}
Move::Capture { .. } => {
let end = mv.get_end_position();
// Make sure the move ends in a valid position
if !DraughtsBoard::is_position_valid(end) {
return Err(Error::InvalidMove);
}
let piece_at_destination = self[mv.get_end_position()];
// Make sure there is no piece at destination
if let Piece::NoPiece = piece_at_destination {
let captured = self[(end + start) / (2, 2)];
// Make sure there is a piece to be captured
if let Piece::NoPiece = captured {
return Err(Error::InvalidMove);
}
// Make sure the captured piece belongs to the opposite player
if let Some(captured_piece_player) = captured.player() {
if captured_piece_player != player {
self[start] = Piece::NoPiece;
self[end] = piece;
self[(end + start) / (2, 2)] = Piece::NoPiece;
} else {
return Err(Error::InvalidMove);
}
} else {
return Err(Error::InvalidMove);
}
} else {
return Err(Error::InvalidMove);
}
}
};
Ok(())
}
}
pub fn moves_for_piece<'a>(
&'a self,
position: Position,
captures_only: bool,
) -> MoveIterator<'a> {
let piece = self[position];
match piece.player() {
Some(_) => MoveIterator::new(self, position, captures_only),
None => MoveIterator::empty_iterator(self),
}
}
}
#[derive(Debug, Clone)]
pub struct BoardIterator<'a> {
board: &'a DraughtsBoard,
index: u8,
}
impl<'a> Iterator for BoardIterator<'a> {
fn next(&mut self) -> Option<Self::Item> {
let res = if self.index < (POSITIONS as u8) {
let pos = Position::from(self.index);
Some((pos, self.board.get(pos)))
} else {
None
};
self.index += 1;
res
}
type Item = (Position, Piece);
}
#[derive(Debug, Clone, Eq, PartialEq)]
pub struct DraughtsGame {
board: DraughtsBoard,
next_move: Player,
}
#[derive(Debug)]
#[derive(Clone)]
pub struct SerializedDraughtsGame {
data: Vec<u8, 24>,
next_move: Player,
}
#[derive(Debug, Clone)]
pub enum Error {
WrongPlayer,
NoPiece,
InvalidMove,
InvalidPosition,
InvalidPiece,
NoPieceCaptured,
FirendlyPieceCaptured,
PositionIsOccupied,
@@ -265,16 +282,16 @@ impl Default for DraughtsGame {
}
}
type MoveRanking<const MAX_SIZE: usize> =
BinaryHeap<MoveHeapEntry, heapless::binary_heap::Max, MAX_SIZE>;
impl DraughtsGame {
pub fn new() -> DraughtsGame {
DraughtsGame::default()
pub fn new<T: FnMut(Position) -> Piece>(cb: T, next_move: Player) -> DraughtsGame {
DraughtsGame {
board: DraughtsBoard::new(cb),
next_move,
}
}
pub fn piece_at(&self, p: Position) -> Piece {
self.board[p]
self.board.get(p)
}
pub fn moves_for_piece(&self, position: Position) -> MoveIterator {
@@ -328,19 +345,17 @@ impl DraughtsGame {
}
pub fn apply_move(&mut self, mv: &Move) -> Result<(), Error> {
let start = mv.get_start_position();
let start = mv.start_position();
let piece = self.board.get_piece(&start);
if let Some(player) = piece.player() {
match mv {
Move::Movement { .. } => {
if mv.is_movement() {
if self.next_move == player {
self.board.apply_move(mv)?;
self.next_turn();
} else {
return Err(Error::WrongPlayer);
}
}
Move::Capture { .. } => {
} else {
if self.next_move == player {
self.board.apply_move(mv)?;
// Check if more captures are available for the current piece
@@ -356,15 +371,17 @@ impl DraughtsGame {
} else {
return Err(Error::WrongPlayer);
}
}
};
let end = mv.get_end_position();
//Promote pawns that reach the last row
if !piece.is_crowned() && DraughtsGame::is_last_row(&end, player) {
self.board[end] = match player {
self.board.set(
end,
match player {
Player::White => Piece::CrownedWhitePawn,
Player::Red => Piece::CrownedRedPawn,
};
},
);
}
Ok(())
} else {
@@ -423,9 +440,6 @@ impl DraughtsGame {
depth: u32,
analyzed_moves: &mut usize,
) -> f32 {
let pos = mv.get_start_position();
let piece = self.board.get_piece(&pos);
let moving_player = piece.player().unwrap();
self.apply_move(mv).unwrap();
if depth != 0 {
let mut best_score = None;
@@ -504,77 +518,66 @@ impl DraughtsGame {
}
}
}
#[derive(Debug, PartialEq, Eq)]
struct MoveHeapEntry {
mv: Move,
score: u32,
}
impl PartialOrd for MoveHeapEntry {
fn partial_cmp(&self, other: &Self) -> Option<core::cmp::Ordering> {
Some(self.score.cmp(&other.score))
impl SerializedDraughtsGame {
fn serialize(position: Position, piece: Piece) -> u8 {
let p = position.row() * 4 + position.col() / 2;
p << 3 | piece as u8
}
fn deserialize(byte: u8) -> Result<(Position, Piece), Error> {
let index = byte >> 3;
let row = index >> 2;
let col = ((index - (row << 2)) % 4) * 2 + (row % 2);
let pos = Position::new(row, col)?;
Ok((
pos,
Piece::from_repr((byte & 7) as usize).ok_or(Error::InvalidPiece)?,
))
}
fn from(
DraughtsGame { board, next_move }: &DraughtsGame,
) -> Result<SerializedDraughtsGame, Error> {
let mut data = Vec::<u8, 24>::new();
for i in 0..DraughtsBoard::rows() {
for j in 0..DraughtsBoard::columns() {
let p = Position::new(i as u8, j as u8)?;
let piece = board.get_piece(&p);
if piece != Piece::NoPiece {
data.push(Self::serialize(p, piece)).unwrap();
}
}
}
Ok(SerializedDraughtsGame {
data,
next_move: *next_move,
})
}
}
impl Ord for MoveHeapEntry {
fn cmp(&self, other: &Self) -> core::cmp::Ordering {
self.score.cmp(&other.score)
impl From<DraughtsGame> for SerializedDraughtsGame {
fn from(DraughtsGame { board, next_move }: DraughtsGame) -> Self {
let mut data = Vec::<u8, 24>::new();
for i in 0..DraughtsBoard::rows() {
for j in 0..DraughtsBoard::columns() {
let p = Position::new(i as u8, j as u8).unwrap();
let piece = board.get_piece(&p);
if piece != Piece::NoPiece {
data.push(Self::serialize(p, piece)).unwrap();
}
}
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
pub enum MoveDirection {
NE,
SE,
SW,
NW,
}
impl MoveDirection {
fn is_forward(&self, piece: Piece) -> Result<bool, Error> {
match piece.player() {
Some(Player::Red) => Ok(matches!(self, Self::SE) || matches!(self, Self::SW)),
Some(Player::White) => Ok(matches!(self, Self::NE) || matches!(self, Self::NW)),
None => Err(Error::NoPiece),
}
}
SerializedDraughtsGame {
data,
next_move: next_move,
}
}
}
#[derive(Debug, PartialEq, Eq)]
pub enum Move {
Movement {
start: Position,
direction: MoveDirection,
},
Capture {
start: Position,
direction: MoveDirection,
},
}
impl Move {
pub fn get_end_position(&self) -> Position {
match self {
Move::Movement { start, direction } => match direction {
MoveDirection::NE => *start + (1, 1),
MoveDirection::SE => *start + (-1, 1),
MoveDirection::SW => *start + (-1, -1),
MoveDirection::NW => *start + (1, -1),
},
Move::Capture { start, direction } => match direction {
MoveDirection::NE => *start + (2, 2),
MoveDirection::SE => *start + (-2, 2),
MoveDirection::SW => *start + (-2, -2),
MoveDirection::NW => *start + (2, -2),
},
}
}
pub fn get_start_position(&self) -> Position {
match self {
Move::Movement { start, .. } => *start,
Move::Capture { start, .. } => *start,
}
impl Into<DraughtsGame> for SerializedDraughtsGame {
fn into(self) -> DraughtsGame {
todo!()
}
}
@@ -594,7 +597,7 @@ impl MoveIterator<'_> {
];
fn piece(&self) -> Piece {
self.board[self.position]
self.board.get(self.position)
}
fn new<'a>(
@@ -612,7 +615,7 @@ impl MoveIterator<'_> {
fn empty_iterator<'a>(board: &'a DraughtsBoard) -> MoveIterator<'a> {
MoveIterator {
board,
position: Position::new(0, 0),
position: Position::new(0, 0).unwrap(),
state: 4,
capture_only: false,
}
@@ -630,13 +633,10 @@ impl<'a> Iterator for MoveIterator<'a> {
if !piece.can_move_backward() && !direction.is_forward(piece).unwrap() {
continue;
}
let movement = Move::Movement {
start: self.position,
direction,
};
let movement = Move::movement(self.position, direction);
let next_pos = movement.get_end_position();
if DraughtsBoard::is_position_valid(next_pos) {
let piece_at_next_position = self.board[next_pos];
let piece_at_next_position = self.board.get(next_pos);
match piece_at_next_position {
Piece::NoPiece => {
if self.capture_only {
@@ -647,13 +647,14 @@ impl<'a> Iterator for MoveIterator<'a> {
}
_ => {
if piece.player() != piece_at_next_position.player() {
let capture = Move::Capture {
start: self.position,
let capture = Move::capture(
self.position,
direction,
};
piece_at_next_position.is_crowned(),
);
let next_position = capture.get_end_position();
if DraughtsBoard::is_position_valid(next_position) {
let piece_at_end_position = self.board[next_position];
let piece_at_end_position = self.board.get(next_position);
if piece_at_end_position == Piece::NoPiece {
return Some(capture);
}
@@ -666,3 +667,210 @@ impl<'a> Iterator for MoveIterator<'a> {
None
}
}
pub struct RDraughtApplication {
initial_state: DraughtsGame,
game: DraughtsGame,
moves: HistoryBuffer<Move, 128>,
cursor: usize,
}
impl RDraughtApplication {
pub fn new(game: DraughtsGame) -> RDraughtApplication {
RDraughtApplication {
initial_state: game.clone(),
game,
moves: HistoryBuffer::<Move, 128>::new(),
cursor: 0usize,
}
}
pub fn undo(&mut self) -> Result<(), Error> {
let mut new_state = self.initial_state.clone();
if self.cursor > 0 && !self.moves.is_empty() {
self.cursor -= 1;
for mv in &self.moves[0..self.cursor] {
new_state.apply_move(mv)?;
}
self.game = new_state;
Ok(())
} else {
Err(Error::InvalidMove)
}
}
pub fn redo(&mut self) -> Result<(), Error> {
let mut new_state = self.initial_state.clone();
if self.cursor < self.moves.len() {
for mv in &self.moves[0..self.cursor] {
new_state.apply_move(mv)?;
}
self.game = new_state;
self.cursor += 1;
Ok(())
} else {
Err(Error::InvalidMove)
}
}
pub fn apply_move(&mut self, mv: Move) -> Result<(), Error> {
self.game.apply_move(&mv)?;
if self.moves.len() == self.moves.capacity() {
self.initial_state.apply_move(self.moves.first().unwrap())?;
}
self.moves.write(mv);
self.cursor += 1;
Ok(())
}
pub fn game(&self) -> &DraughtsGame {
&self.game
}
}
#[cfg(feature = "std")]
mod std {
extern crate std;
use super::Position;
use std::hash::{Hash, Hasher};
impl Hash for Position {
fn hash<H: Hasher>(&self, state: &mut H) {
state.write_u8(self.row());
state.write_u8(self.col());
}
}
}
#[cfg(feature = "std")]
pub use std::*;
#[cfg(test)]
#[cfg(feature = "std")]
mod tests {
extern crate std;
use super::{
DraughtsBoard, DraughtsGame, Move, MoveDirection, Piece, Player, Position,
SerializedDraughtsGame,
};
use std::collections::HashMap;
use std::hash::{Hash, Hasher};
#[test]
fn test_serialize_deserialize_piece() {
for (pos, piece) in [
(Position::new(4u8, 2u8), Piece::SimpleRedPawn),
(Position::new(0u8, 6u8), Piece::CrownedRedPawn),
(Position::new(1u8, 7u8), Piece::SimpleWhitePawn),
(Position::new(2u8, 4u8), Piece::CrownedWhitePawn),
(Position::new(3u8, 5u8), Piece::SimpleRedPawn),
(Position::new(6u8, 2u8), Piece::CrownedRedPawn),
(Position::new(7u8, 7u8), Piece::SimpleWhitePawn),
(Position::new(7u8, 1u8), Piece::CrownedWhitePawn),
(Position::new(6u8, 6u8), Piece::SimpleRedPawn),
(Position::new(4u8, 6u8), Piece::CrownedRedPawn),
(Position::new(6u8, 6u8), Piece::SimpleWhitePawn),
(Position::new(4u8, 6u8), Piece::CrownedWhitePawn),
] {
let pos = pos.unwrap();
let serialized = SerializedDraughtsGame::serialize(pos, piece);
let (deserialized_pos, deserialized_piece) =
SerializedDraughtsGame::deserialize(serialized).unwrap();
assert_eq!(piece, deserialized_piece);
assert_eq!(pos, deserialized_pos);
}
}
#[test]
fn test_create() {
let boards = [
[
(Position::new(2, 4), Piece::CrownedRedPawn),
(Position::new(0, 0), Piece::CrownedWhitePawn),
(Position::new(5, 1), Piece::SimpleWhitePawn),
(Position::new(7, 1), Piece::SimpleRedPawn),
(Position::new(7, 7), Piece::SimpleRedPawn),
(Position::new(1, 3), Piece::CrownedRedPawn),
],
[
(Position::new(1, 3), Piece::CrownedRedPawn),
(Position::new(2, 0), Piece::CrownedWhitePawn),
(Position::new(4, 2), Piece::SimpleWhitePawn),
(Position::new(5, 1), Piece::SimpleRedPawn),
(Position::new(6, 6), Piece::SimpleRedPawn),
(Position::new(7, 5), Piece::CrownedRedPawn),
],
];
for pieces in boards.into_iter() {
let map = pieces
.into_iter()
.map(|(pos, piece)| (pos.unwrap(), piece))
.collect::<HashMap<Position, Piece>>();
let board = DraughtsBoard::new(|p| match map.get(&p) {
None => Piece::NoPiece,
Some(piece) => *piece,
});
for (pos, piece) in map.iter() {
assert_eq!(*piece, board.get(*pos));
}
}
}
}
#[cfg(test)]
#[cfg(feature = "std")]
mod ai_tests {
extern crate std;
use super::{DraughtsBoard, DraughtsGame, Move, MoveDirection, Piece, Player, Position};
use std::collections::HashMap;
#[test]
fn ai_test_simple() {
let mut pieces = HashMap::<Position, Piece>::new();
pieces.insert(Position::new(2, 4).unwrap(), Piece::CrownedRedPawn);
pieces.insert(Position::new(7, 3).unwrap(), Piece::CrownedWhitePawn);
let game = DraughtsGame::new(
|p| match pieces.get(&p) {
None => Piece::NoPiece,
Some(piece) => *piece,
},
Player::Red,
);
let (best_move, _) = game.get_best_move(8);
assert_eq!(
Some(Move::movement(
Position::new(2, 4).unwrap(),
MoveDirection::NE
)),
best_move
);
}
#[test]
fn ai_test_multiple_capture() {
let mut pieces = HashMap::<Position, Piece>::new();
pieces.insert(Position::new(4, 4).unwrap(), Piece::SimpleWhitePawn);
pieces.insert(Position::new(4, 0).unwrap(), Piece::SimpleWhitePawn);
pieces.insert(Position::new(6, 2).unwrap(), Piece::SimpleRedPawn);
pieces.insert(Position::new(7, 1).unwrap(), Piece::SimpleRedPawn);
let game = DraughtsGame::new(
|p| match pieces.get(&p) {
None => Piece::NoPiece,
Some(piece) => *piece,
},
Player::Red,
);
let (best_move, _) = game.get_best_move(5);
assert_eq!(
Some(Move::movement(
Position::new(6, 2).unwrap(),
MoveDirection::SW
)),
best_move
);
}
}

19
rdraught/src/lib.rs
View File

@@ -1,7 +1,16 @@
#![no_std]
mod board;
pub mod draughts;
pub mod position;
#[macro_use]
extern crate strum;
//use draughts::DraughtsBoard;
//use draughts::Piece;
mod constants;
pub mod draughts;
mod movement;
mod piece;
mod player;
mod position;
pub use draughts::{DraughtsBoard, DraughtsGame, Error, RDraughtApplication, RectangularBoard};
pub use movement::Move;
pub use piece::Piece;
pub use player::Player;
pub use position::Position;

121
rdraught/src/movement.rs Normal file
View File

@@ -0,0 +1,121 @@
use crate::position::Position;
use crate::{Piece, Player, draughts::Error};
use strum_macros::FromRepr;
#[derive(Debug, Copy, Clone, PartialEq, Eq, FromRepr)]
pub enum MoveDirection {
NE = 0,
SE = 1,
SW = 2,
NW = 3,
}
impl MoveDirection {
pub fn is_forward(&self, piece: Piece) -> Result<bool, Error> {
match piece.player() {
Some(Player::Red) => Ok(matches!(self, Self::SE) || matches!(self, Self::SW)),
Some(Player::White) => Ok(matches!(self, Self::NE) || matches!(self, Self::NW)),
None => Err(Error::NoPiece),
}
}
}
#[derive(Debug, PartialEq, Eq)]
pub struct Move {
data: u16,
}
impl Move {
pub fn movement(start: Position, dir: MoveDirection) -> Move {
let mut result = <Position as Into<u8>>::into(start) as u16;
result |= (dir as u16) << 5;
Move { data: result }
}
pub fn capture(start: Position, dir: MoveDirection, crowned_capture: bool) -> Move {
let mut result = <Position as Into<u8>>::into(start) as u16;
result |= (dir as u16) << 5;
result |= 1u16 << 7;
if crowned_capture {
result |= 1u16 << 8;
}
Move { data: result }
}
pub fn start_position(&self) -> Position {
Position::from((self.data & 31) as u8)
}
pub fn direction(&self) -> MoveDirection {
MoveDirection::from_repr(((self.data & 96) >> 5) as usize).unwrap()
}
pub fn is_capture(&self) -> bool {
(self.data & 128) != 0
}
pub fn is_movement(&self) -> bool {
!self.is_capture()
}
pub fn crowned_captured(&self) -> bool {
(self.data & 256) != 0
}
pub fn get_end_position(&self) -> Position {
if self.is_capture() {
let start = self.start_position();
let direction = self.direction();
match direction {
MoveDirection::NE => start + (2, 2),
MoveDirection::SE => start + (-2, 2),
MoveDirection::SW => start + (-2, -2),
MoveDirection::NW => start + (2, -2),
}
} else {
let start = self.start_position();
let direction = self.direction();
match direction {
MoveDirection::NE => start + (1, 1),
MoveDirection::SE => start + (-1, 1),
MoveDirection::SW => start + (-1, -1),
MoveDirection::NW => start + (1, -1),
}
}
}
}
#[cfg(test)]
mod tests {
use super::{Move, MoveDirection};
use crate::Position;
struct MoveData {
start: Position,
dir: MoveDirection,
capture: bool,
crowned_capture: bool,
}
#[test]
fn test_from_into() {
let move_datas = [MoveData {
start: Position::new(0, 0).unwrap(),
dir: super::MoveDirection::NE,
capture: false,
crowned_capture: false,
}];
for md in move_datas {
let mv = if md.capture {
Move::capture(md.start, md.dir, md.crowned_capture)
} else {
Move::movement(md.start, md.dir)
};
assert_eq!(md.start, mv.start_position());
assert_eq!(md.dir, mv.direction());
assert_eq!(md.capture, mv.is_capture());
assert_eq!(md.crowned_capture, mv.crowned_captured());
}
}
}

35
rdraught/src/piece.rs Normal file
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@@ -0,0 +1,35 @@
use crate::player::Player;
use strum_macros::FromRepr;
#[derive(Debug, PartialEq, Eq, Clone, Copy, FromRepr)]
pub enum Piece {
NoPiece = 0,
SimpleRedPawn = 1,
CrownedRedPawn = 3,
SimpleWhitePawn = 2,
CrownedWhitePawn = 4,
}
impl Piece {
pub fn player(&self) -> Option<Player> {
if self.is_present() && (*self as u32) % 2 == 1 {
Some(Player::Red)
} else if self.is_present() && (*self as u32) % 2 == 0 {
Some(Player::White)
} else {
None
}
}
pub fn is_present(&self) -> bool {
*self != Piece::NoPiece
}
pub fn is_crowned(&self) -> bool {
(*self as u32) > 2
}
pub fn can_move_backward(&self) -> bool {
self.is_crowned()
}
}

5
rdraught/src/player.rs Normal file
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@@ -0,0 +1,5 @@
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub enum Player {
White = 0,
Red = 1,
}

54
rdraught/src/position.rs
View File

@@ -1,9 +1,12 @@
use crate::Error;
use core::fmt::Display;
use core::ops::Add;
use core::ops::Div;
use core::ops::Mul;
use core::ops::Sub;
use crate::constants::POSITIONS_PER_ROW;
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub struct Position((u8, u8));
@@ -22,8 +25,12 @@ impl Position {
Position((index.0 as u8, index.1 as u8))
}
pub fn new(row: u8, column: u8) -> Position {
Position((row, column))
pub fn new(row: u8, column: u8) -> Result<Position, Error> {
if (row + column) % 2 == 0 {
Ok(Position((row, column)))
} else {
Err(Error::InvalidPosition)
}
}
pub fn row(&self) -> u8 {
@@ -109,3 +116,46 @@ impl Mul<(i32, i32)> for Position {
))
}
}
impl Into<u8> for Position {
fn into(self) -> u8 {
(8 - 1 - self.row()) * (POSITIONS_PER_ROW as u8) + self.col() / 2
}
}
impl From<u8> for Position {
fn from(n: u8) -> Self {
// println!("{}", n);
let row = 8 - 1 - n / (POSITIONS_PER_ROW as u8);
let offset = if row % 2 == 0 { 0u8 } else { 1u8 };
let col = n % (POSITIONS_PER_ROW as u8) * 2 + offset;
Position::new(row, col).unwrap()
}
}
#[cfg(test)]
mod tests {
use super::Position;
#[test]
fn test_from_into() {
let positions = [
Position::new(4, 6),
Position::new(0, 4),
Position::new(1, 3),
Position::new(7, 1),
Position::new(2, 2),
Position::new(5, 3),
Position::new(3, 7),
Position::new(6, 0),
Position::new(7, 7),
];
for p in positions {
let p = p.unwrap();
let n = <Position as Into<u8>>::into(p);
let p2 = <Position as From<u8>>::from(n);
assert_eq!(p, p2);
}
}
}