idklol

Reviewed-on: #1

.gitignore

@@ -1,7 +1,9 @@
 *.hex
 *.log
+*.out
 *env
 .dep
 **/target/
 /hello_world/main
 /aoc*/**/input
+/arduino/build-*/

arduino/.envrc

@@ -0,0 +1,2 @@
+export ARDMK_DIR=/usr/share/arduino
+export ARDMK_VENDOR=archlinux-arduino

arduino/Makefile

@@ -0,0 +1,3 @@
+BOARD_TAG    = uno
+
+include $(ARDMK_DIR)/Arduino.mk

arduino/sos.ino

@@ -0,0 +1,31 @@
+#define DIT_DURATION_MS 88
+#define LETTER_PAUSE_MS 1000
+
+void setup() {
+	pinMode(13, OUTPUT);
+}
+
+void dit() {
+	digitalWrite(13, HIGH);
+	delay(DIT_DURATION_MS);
+	digitalWrite(13, LOW);
+	delay(DIT_DURATION_MS);
+}
+
+void dah() {
+	digitalWrite(13, HIGH);
+	delay(DIT_DURATION_MS * 3);
+	digitalWrite(13, LOW);
+	delay(DIT_DURATION_MS);
+}
+
+void loop() {
+	dit(); dit(); dit();
+	delay(LETTER_PAUSE_MS);
+
+	dah();
+	delay(LETTER_PAUSE_MS);
+
+	dit(); dit(); dit();
+	delay(LETTER_PAUSE_MS);
+}

cat-town/.gitignore

@@ -0,0 +1,3 @@
+/node_modules/
+/src/*.js
+/dist/

cat-town/package.json

@@ -0,0 +1,30 @@
+{
+  "name": "cat-town",
+  "version": "0.1.0",
+  "private": true,
+  "main": "index.js",
+  "scripts": {
+    "webpack": "webpack",
+    "dev": "webpack serve --config webpack.development.js",
+    "start": "npm run dev",
+    "build:dev": "webpack --config webpack.development.js",
+    "build:prod": "webpack --config webpack.production.js"
+  },
+  "devDependencies": {
+    "@excaliburjs/testing": "^0.25.1",
+    "clean-webpack-plugin": "^3.0.0",
+    "compression-webpack-plugin": "^7.1.2",
+    "html-webpack-plugin": "^5.5.0",
+    "source-map-loader": "^2.0.2",
+    "terser-webpack-plugin": "^5.3.6",
+    "ts-loader": "^9.4.2",
+    "typescript": "^4.9.4",
+    "webpack": "^5.75.0",
+    "webpack-cli": "^4.10.0",
+    "webpack-dev-server": "^4.11.1",
+    "webpack-merge": "^5.8.0"
+  },
+  "dependencies": {
+    "excalibur": "^0.27.0"
+  }
+}

cat-town/src/actors/player.ts

@@ -0,0 +1,17 @@
+import { Actor, Color, vec } from 'excalibur'
+import { Resources } from '../resources'
+
+export class Player extends Actor {
+  constructor() {
+    super({
+      pos: vec(150, 150),
+      width: 25,
+      height: 25,
+      color: new Color(255, 100, 100)
+    })
+  }
+
+  onInitialize() {
+    this.graphics.use(Resources.Cat.toSprite())
+  }
+}

cat-town/src/cat.ts

@@ -0,0 +1,16 @@
+// type Cat = {
+//   name string;
+//   years int;
+//   centimeters int;
+//   kilograms int;
+//   coloring Coloring;
+//   pattern Pattern;
+//   mood Mood;
+// };
+// 
+// type Coloring = 'orange' | 'black' | 'brown' | 'blue';
+// 
+// type Pattern = 'plain' | 'striped' | 'spotted';
+// 
+// type Mood = 'happy' | 'sad' | 'purring' |
+//   'screaming' | 'mad' | 'scratchy' | 'curious' | 'concerned';

cat-town/src/index.ts

@@ -0,0 +1,30 @@
+import { Engine, Loader, DisplayMode } from 'excalibur'
+import { Beginning } from './scenes/beginning'
+import { Player } from './actors/player'
+import { Resources } from './resources'
+
+class Game extends Engine {
+  private player: Player
+  private beginning: Beginning
+
+  constructor() {
+    super({ displayMode: DisplayMode.FitScreen })
+  }
+
+  public start() {
+    this.beginning = new Beginning()
+    this.player = new Player()
+    this.beginning.add(this.player)
+
+    game.add('beginning', this.beginning)
+
+    const loader = new Loader(Object.values(Resources))
+
+    return super.start(loader)
+  }
+}
+
+const game = new Game()
+game.start().then(() => {
+  game.goToScene('beginning')
+})

cat-town/src/resources.ts

@@ -0,0 +1,8 @@
+import { ImageSource } from 'excalibur'
+import catImage from './images/cat.png'
+
+const Resources = {
+  Cat: new ImageSource(catImage)
+}
+
+export { Resources }

cat-town/src/scenes/beginning.ts

@@ -0,0 +1,7 @@
+import { Engine, Scene } from 'excalibur'
+
+export class Beginning extends Scene {
+  public onInitialize(engine: Engine) {}
+  public onActivate() {}
+  public onDeactivate() {}
+}

cat-town/src/town.ts

@@ -0,0 +1,22 @@
+// type Town = {
+//   grid Grid;
+// };
+// 
+// type Grid = {
+//   squares Map<Coords, Square>;
+// };
+// 
+// type Coords = {
+//   x int;
+//   y int;
+// };
+// 
+// type Square = {
+//   description string;
+//   things Map<string, Thing>;
+// };
+// 
+// type Thing = {
+//   name string;
+//   description string;
+// };

cat-town/tsconfig.json

@@ -0,0 +1,14 @@
+{
+  "compilerOptions": {
+    "allowSyntheticDefaultImports": true,
+    "moduleResolution": "node",
+    "sourceMap": true,
+    "target": "es2017",
+    "module": "es6",
+    "types": ["excalibur"],
+    "outDir": "./dist/",
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "skipLibCheck": true
+  }
+}

cat-town/webpack.common.js

@@ -0,0 +1,47 @@
+const path = require("path");
+const { CleanWebpackPlugin } = require("clean-webpack-plugin");
+const HtmlWebPackPlugin = require("html-webpack-plugin");
+
+module.exports = {
+  entry: "./src/index.ts",
+  target: "web",
+  output: {
+    filename: '[name].js',
+    sourceMapFilename: "[file].map",
+    path: path.resolve(__dirname, "dist"),
+  },
+  devtool: "source-map",
+  module: {
+    rules: [
+      {
+        test: /\.(png|svg|jpg|jpeg|gif)$/i,
+        type: "asset/resource"
+      },
+      {
+        test: /\.js$/,
+        use: ["source-map-loader"],
+        exclude: [path.resolve(__dirname, "node_modules/excalibur")],
+        enforce: "pre",
+      },
+      {
+        test: /\.tsx?$/,
+        use: "ts-loader",
+        exclude: /node_modules/,
+      },
+    ],
+  },
+  resolve: {
+    extensions: [".tsx", ".ts", ".js"],
+  },
+  optimization: {
+    splitChunks: {
+      chunks: "all",
+    },
+  },
+  plugins: [
+    new CleanWebpackPlugin(),
+    new HtmlWebPackPlugin({
+      title: "Cat Town",
+    }),
+  ],
+};

cat-town/webpack.development.js

@@ -0,0 +1,12 @@
+const { merge } = require("webpack-merge");
+const common = require("./webpack.common");
+
+module.exports = merge(common, {
+  mode: "development",
+  devtool: "inline-source-map",
+  devServer: {
+    static: {
+      directory: "./dist",
+    },
+  },
+});

cat-town/webpack.production.js

@@ -0,0 +1,13 @@
+const { merge } = require("webpack-merge");
+const CompressionWebpackPlugin = require("compression-webpack-plugin");
+const TerserPlugin = require("terser-webpack-plugin");
+const common = require("./webpack.common");
+
+module.exports = merge(common, {
+  mode: "production",
+  optimization: {
+    minimize: true,
+    minimizer: [new TerserPlugin()],
+  },
+  plugins: [new CompressionWebpackPlugin()],
+});

piston-tutorials/getting-started/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "spinning-square"
+version = "0.1.0"
+authors = [
+  "Dan Buch <dan@meatballhat.com>",
+  "TyOverby <ty@pre-alpha.com>",
+  "Nikita Pekin <contact@nikitapek.in>"
+]
+
+[[bin]]
+name = "spinning-square"
+
+[dependencies]
+piston = "0.53.0"
+piston2d-graphics = "0.43.0"
+pistoncore-glutin_window = "0.70.1"
+piston2d-opengl_graphics = "0.82.0"

piston-tutorials/getting-started/src/main.rs

@@ -0,0 +1,70 @@
+extern crate glutin_window;
+extern crate graphics;
+extern crate opengl_graphics;
+extern crate piston;
+
+use glutin_window::GlutinWindow as Window;
+use opengl_graphics::{GlGraphics, OpenGL};
+use piston::event_loop::{EventSettings, Events};
+use piston::input::{RenderArgs, RenderEvent, UpdateArgs, UpdateEvent};
+use piston::window::WindowSettings;
+
+pub struct App {
+    gl: GlGraphics,
+    rotation: f64,
+}
+
+impl App {
+    fn render(&mut self, args: &RenderArgs) {
+        use graphics::*;
+
+        const GREEN: [f32; 4] = [0.0, 1.0, 0.0, 1.0];
+        const RED: [f32; 4] = [1.0, 0.0, 0.0, 1.0];
+
+        let square = rectangle::square(0.0, 0.0, 50.0);
+        let rotation = self.rotation;
+        let (x, y) = (args.window_size[0] / 2.0, args.window_size[1] / 2.0);
+
+        self.gl.draw(args.viewport(), |c, gl| {
+            clear(GREEN, gl);
+
+            let transform = c
+                .transform
+                .trans(x, y)
+                .rot_rad(rotation)
+                .trans(-25.0, -25.0);
+
+            rectangle(RED, square, transform, gl);
+        })
+    }
+
+    fn update(&mut self, args: &UpdateArgs) {
+        self.rotation += 2.0 * args.dt;
+    }
+}
+
+fn main() {
+    let opengl = OpenGL::V3_2;
+
+    let mut window: Window = WindowSettings::new("spinning-square", [200, 200])
+        .graphics_api(opengl)
+        .exit_on_esc(true)
+        .build()
+        .unwrap();
+
+    let mut app = App {
+        gl: GlGraphics::new(opengl),
+        rotation: 0.0,
+    };
+
+    let mut events = Events::new(EventSettings::new());
+    while let Some(e) = events.next(&mut window) {
+        if let Some(args) = e.render_args() {
+            app.render(&args);
+        }
+
+        if let Some(args) = e.update_args() {
+            app.update(&args);
+        }
+    }
+}

piston-tutorials/sudoku/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "sudoku"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+piston = "0.53.2"
+piston2d-graphics = "0.43.0"
+piston2d-opengl_graphics = "0.82.0"
+pistoncore-glutin_window = "0.70.1"

piston-tutorials/sudoku/assets/LICENSE

@@ -0,0 +1,99 @@
+Copyright (c) 2014, Mozilla Foundation https://mozilla.org/
+with Reserved Font Name Fira Sans.
+
+Copyright (c) 2014, Mozilla Foundation https://mozilla.org/
+with Reserved Font Name Fira Mono.
+
+Copyright (c) 2014, Telefonica S.A.
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded,
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

piston-tutorials/sudoku/src/gameboard.rs

@@ -0,0 +1,155 @@
+//! Game board logic.
+
+use std::fs::read_to_string;
+
+const SIZE: usize = 9;
+
+#[derive(Clone, Copy, Debug, Default, PartialEq)]
+pub struct Cell {
+    pub value: u8,
+    pub loaded: bool,
+    pub invalid: bool,
+}
+
+#[derive(Debug, PartialEq)]
+pub struct Gameboard {
+    pub cells: [[Cell; SIZE]; SIZE],
+    pub completed: bool,
+}
+
+impl Gameboard {
+    pub fn new() -> Gameboard {
+        Gameboard {
+            cells: [[Cell::default(); SIZE]; SIZE],
+            completed: false,
+        }
+    }
+
+    pub fn from_cells(cells: [[u8; SIZE]; SIZE]) -> Gameboard {
+        let mut ret = Gameboard::new();
+        for (i, row) in cells.iter().enumerate() {
+            for (j, &col) in row.iter().enumerate() {
+                ret.cells[i][j] = Cell {
+                    value: col,
+                    loaded: col != 0,
+                    invalid: false,
+                };
+            }
+        }
+        ret
+    }
+
+    pub fn char(&self, ind: [usize; 2]) -> Option<char> {
+        Some(match self.cells[ind[1]][ind[0]].value {
+            1 => '1',
+            2 => '2',
+            3 => '3',
+            4 => '4',
+            5 => '5',
+            6 => '6',
+            7 => '7',
+            8 => '8',
+            9 => '9',
+            _ => return None,
+        })
+    }
+
+    pub fn set(&mut self, ind: [usize; 2], val: u8) {
+        if !self.cells[ind[1]][ind[0]].loaded {
+            self.validate(ind, val);
+            self.cells[ind[1]][ind[0]].value = val;
+        }
+
+        self.completed = self
+            .cells
+            .iter()
+            .flatten()
+            .all(|cell| !cell.invalid && cell.value != 0);
+    }
+
+    pub fn load_sdm(filename: &str) -> Self {
+        let data = read_to_string(filename).expect("failed to read SDM file");
+        let mut cells = [[Cell::default(); SIZE]; SIZE];
+        let mut row = 0;
+        let mut col = 0;
+        for c in data.chars() {
+            if col == SIZE {
+                col = 0;
+                row += 1;
+            }
+            if let Some(v) = c.to_digit(10) {
+                let value = v as u8;
+                cells[row][col] = Cell {
+                    value,
+                    loaded: value != 0,
+                    invalid: false,
+                };
+                col += 1;
+            }
+        }
+
+        Self {
+            cells,
+            completed: false,
+        }
+    }
+
+    fn validate(&mut self, ind: [usize; 2], val: u8) {
+        let [b, a] = ind;
+        for i in 0..SIZE {
+            if i == a {
+                continue;
+            }
+            if self.cells[a][i].value == val {
+                self.cells[a][b].invalid = true;
+                return;
+            }
+        }
+
+        for i in 0..SIZE {
+            if i == b {
+                continue;
+            }
+            if self.cells[i][b].value == val {
+                self.cells[a][b].invalid = true;
+                return;
+            }
+        }
+
+        let (row, col) = (a / 3, b / 3);
+        for i in 3 * row..3 * row + 3 {
+            for j in 3 * col..3 * col + 3 {
+                if i == a && j == b {
+                    continue;
+                }
+                if self.cells[i][j].value == val {
+                    self.cells[a][b].invalid = true;
+                    return;
+                }
+            }
+        }
+        self.cells[a][b].invalid = false;
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn load_sdm() {
+        let got = Gameboard::load_sdm("static/puzzle.sdm");
+        let want = Gameboard::from_cells([
+            [0, 1, 6, 4, 0, 0, 0, 0, 0],
+            [2, 0, 0, 0, 0, 9, 0, 0, 0],
+            [4, 0, 0, 0, 0, 0, 0, 6, 2],
+            [0, 7, 0, 2, 3, 0, 1, 0, 0],
+            [1, 0, 0, 0, 0, 0, 0, 0, 3],
+            [0, 0, 3, 0, 8, 7, 0, 4, 0],
+            [9, 6, 0, 0, 0, 0, 0, 0, 5],
+            [0, 0, 0, 8, 0, 0, 0, 0, 7],
+            [0, 0, 0, 0, 0, 6, 8, 2, 0],
+        ]);
+        assert_eq!(got, want);
+    }
+}

piston-tutorials/sudoku/src/gameboard_controller.rs

@@ -0,0 +1,57 @@
+//! Gameboard controller
+
+use piston::GenericEvent;
+
+use crate::Gameboard;
+
+pub struct GameboardController {
+    pub gameboard: Gameboard,
+    pub selected_cell: Option<[usize; 2]>,
+    cursor_pos: [f64; 2],
+}
+
+impl GameboardController {
+    pub fn new(gameboard: Gameboard) -> GameboardController {
+        GameboardController {
+            gameboard: gameboard,
+            selected_cell: None,
+            cursor_pos: [0.0; 2],
+        }
+    }
+
+    pub fn event<E: GenericEvent>(&mut self, pos: [f64; 2], size: f64, e: &E) {
+        use piston::input::{Button, Key, MouseButton};
+
+        if let Some(pos) = e.mouse_cursor_args() {
+            self.cursor_pos = pos;
+        }
+
+        if let Some(Button::Mouse(MouseButton::Left)) = e.press_args() {
+            let x = self.cursor_pos[0] - pos[0];
+            let y = self.cursor_pos[1] - pos[1];
+
+            if x >= 0.0 && x < size && y >= 0.0 && y < size {
+                let cell_x = (x / size * 9.0) as usize;
+                let cell_y = (y / size * 9.0) as usize;
+                self.selected_cell = Some([cell_x, cell_y]);
+            }
+        }
+
+        if let Some(Button::Keyboard(key)) = e.press_args() {
+            if let Some(ind) = self.selected_cell {
+                match key {
+                    Key::D1 => self.gameboard.set(ind, 1),
+                    Key::D2 => self.gameboard.set(ind, 2),
+                    Key::D3 => self.gameboard.set(ind, 3),
+                    Key::D4 => self.gameboard.set(ind, 4),
+                    Key::D5 => self.gameboard.set(ind, 5),
+                    Key::D6 => self.gameboard.set(ind, 6),
+                    Key::D7 => self.gameboard.set(ind, 7),
+                    Key::D8 => self.gameboard.set(ind, 8),
+                    Key::D9 => self.gameboard.set(ind, 9),
+                    _ => {}
+                }
+            }
+        }
+    }
+}

piston-tutorials/sudoku/src/gameboard_view.rs

@@ -0,0 +1,210 @@
+//! Gameboard view.
+
+use graphics::character::CharacterCache;
+use graphics::types::Color;
+use graphics::{Context, Graphics};
+
+use crate::gameboard_controller::GameboardController;
+
+pub struct GameboardViewSettings {
+    pub position: [f64; 2],
+    pub size: f64,
+    pub background_color: Color,
+    pub border_color: Color,
+    pub board_edge_color: Color,
+    pub section_edge_color: Color,
+    pub cell_edge_color: Color,
+    pub board_edge_radius: f64,
+    pub section_edge_radius: f64,
+    pub cell_edge_radius: f64,
+    pub selected_cell_background_color: Color,
+    pub text_color: Color,
+    pub loaded_cell_background_color: Color,
+    pub invalid_cell_background_color: Color,
+    pub invalid_selected_cell_background_color: Color,
+    pub completed_background_color: Color,
+}
+
+impl GameboardViewSettings {
+    pub fn new() -> GameboardViewSettings {
+        GameboardViewSettings {
+            position: [10.0; 2],
+            size: 400.0,
+            background_color: [0.8, 0.8, 1.0, 1.0],
+            border_color: [0.0, 0.0, 0.2, 1.0],
+            board_edge_color: [0.0, 0.0, 0.2, 1.0],
+            section_edge_color: [0.0, 0.0, 0.2, 1.0],
+            cell_edge_color: [0.0, 0.0, 0.2, 1.0],
+            board_edge_radius: 3.0,
+            section_edge_radius: 2.0,
+            cell_edge_radius: 1.0,
+            selected_cell_background_color: [0.9, 0.9, 1.0, 1.0],
+            text_color: [0.0, 0.0, 0.1, 1.0],
+            loaded_cell_background_color: [1.0, 1.0, 1.0, 1.0],
+            invalid_cell_background_color: [1.0, 0.0, 0.0, 1.0],
+            invalid_selected_cell_background_color: [1.0, 0.0, 0.5, 1.0],
+            completed_background_color: [0.0, 1.0, 0.0, 1.0],
+        }
+    }
+}
+
+pub struct GameboardView {
+    pub settings: GameboardViewSettings,
+}
+
+impl GameboardView {
+    pub fn new(settings: GameboardViewSettings) -> GameboardView {
+        GameboardView { settings: settings }
+    }
+
+    pub fn draw<G: Graphics, C>(
+        &self,
+        controller: &GameboardController,
+        glyphs: &mut C,
+        c: &Context,
+        g: &mut G,
+    ) where
+        C: CharacterCache<Texture = G::Texture>,
+    {
+        use graphics::{Image, Line, Rectangle, Transformed};
+
+        let ref settings = self.settings;
+        let board_rect = [
+            settings.position[0],
+            settings.position[1],
+            settings.size,
+            settings.size,
+        ];
+
+        if controller.gameboard.completed {
+            Rectangle::new(settings.completed_background_color).draw(
+                board_rect,
+                &c.draw_state,
+                c.transform,
+                g,
+            );
+        } else {
+            Rectangle::new(settings.background_color).draw(
+                board_rect,
+                &c.draw_state,
+                c.transform,
+                g,
+            );
+
+            for i in 0..9 {
+                for j in 0..9 {
+                    if controller.gameboard.cells[i][j].loaded {
+                        color_cell(
+                            settings,
+                            [j, i],
+                            settings.loaded_cell_background_color,
+                            c,
+                            g,
+                        );
+                    } else if controller.gameboard.cells[i][j].invalid {
+                        color_cell(
+                            settings,
+                            [j, i],
+                            settings.invalid_cell_background_color,
+                            c,
+                            g,
+                        );
+                    }
+                }
+            }
+
+            if let Some(ind) = controller.selected_cell {
+                let cell = controller.gameboard.cells[ind[1]][ind[0]];
+                let color = if !cell.loaded {
+                    if !cell.invalid {
+                        settings.selected_cell_background_color
+                    } else {
+                        settings.invalid_selected_cell_background_color
+                    }
+                } else {
+                    settings.loaded_cell_background_color
+                };
+                color_cell(settings, ind, color, c, g);
+            }
+        }
+
+        let text_image = Image::new_color(settings.text_color);
+        let cell_size = settings.size / 9.0;
+
+        for j in 0..9 {
+            for i in 0..9 {
+                if let Some(ch) = controller.gameboard.char([i, j]) {
+                    let pos = [
+                        settings.position[0] + i as f64 * cell_size + 15.0,
+                        settings.position[1] + j as f64 * cell_size + 34.0,
+                    ];
+
+                    if let Ok(character) = glyphs.character(34, ch) {
+                        let ch_x = pos[0] + character.left();
+                        let ch_y = pos[1] - character.top();
+                        let text_image = text_image.src_rect([
+                            character.atlas_offset[0],
+                            character.atlas_offset[1],
+                            character.atlas_size[0],
+                            character.atlas_size[1],
+                        ]);
+                        text_image.draw(
+                            character.texture,
+                            &c.draw_state,
+                            c.transform.trans(ch_x, ch_y),
+                            g,
+                        );
+                    }
+                }
+            }
+        }
+
+        let cell_edge = Line::new(settings.cell_edge_color, settings.cell_edge_radius);
+        let section_edge = Line::new(settings.section_edge_color, settings.section_edge_radius);
+
+        for i in 0..9 {
+            let x = settings.position[0] + i as f64 / 9.0 * settings.size;
+            let y = settings.position[1] + i as f64 / 9.0 * settings.size;
+            let x2 = settings.position[0] + settings.size;
+            let y2 = settings.position[1] + settings.size;
+
+            let vline = [x, settings.position[1], x, y2];
+            let hline = [settings.position[0], y, x2, y];
+
+            if (i % 3) == 0 {
+                section_edge.draw(vline, &c.draw_state, c.transform, g);
+                section_edge.draw(hline, &c.draw_state, c.transform, g);
+            } else {
+                cell_edge.draw(vline, &c.draw_state, c.transform, g);
+                cell_edge.draw(hline, &c.draw_state, c.transform, g);
+            }
+        }
+
+        Rectangle::new_border(settings.board_edge_color, settings.board_edge_radius).draw(
+            board_rect,
+            &c.draw_state,
+            c.transform,
+            g,
+        );
+    }
+}
+
+fn color_cell<G: Graphics>(
+    settings: &GameboardViewSettings,
+    ind: [usize; 2],
+    color: [f32; 4],
+    c: &Context,
+    g: &mut G,
+) {
+    use graphics::Rectangle;
+
+    let cell_size = settings.size / 9.0;
+    let pos = [ind[0] as f64 * cell_size, ind[1] as f64 * cell_size];
+    let cell_rect = [
+        settings.position[0] + pos[0],
+        settings.position[1] + pos[1],
+        cell_size,
+        cell_size,
+    ];
+    Rectangle::new(color).draw(cell_rect, &c.draw_state, c.transform, g);
+}

piston-tutorials/sudoku/src/main.rs

@@ -0,0 +1,57 @@
+//////#![deny(missing_docs)]
+
+//! An Sudoko please.
+
+extern crate glutin_window;
+
+use glutin_window::GlutinWindow;
+use opengl_graphics::{Filter, GlGraphics, GlyphCache, OpenGL, TextureSettings};
+use piston::event_loop::{EventSettings, Events};
+use piston::{EventLoop, RenderEvent, WindowSettings};
+
+pub use crate::gameboard::Gameboard;
+pub use crate::gameboard_controller::GameboardController;
+pub use crate::gameboard_view::{GameboardView, GameboardViewSettings};
+
+mod gameboard;
+mod gameboard_controller;
+mod gameboard_view;
+
+fn main() {
+    let opengl = OpenGL::V3_2;
+    let settings = WindowSettings::new("Sudoku", (640, 480))
+        .exit_on_esc(true)
+        .graphics_api(opengl)
+        .vsync(true);
+    let mut window: GlutinWindow = settings.build().expect("could not create window");
+    let mut events = Events::new(EventSettings::new().lazy(true));
+    let mut gl = GlGraphics::new(opengl);
+
+    let args: Vec<_> = std::env::args().collect();
+    let infile = args.get(1).expect("usage: sudoku <sdm-file>");
+
+    let gameboard = Gameboard::load_sdm(infile);
+    let mut gameboard_controller = GameboardController::new(gameboard);
+    let gameboard_view_settings = GameboardViewSettings::new();
+    let gameboard_view = GameboardView::new(gameboard_view_settings);
+
+    let texture_settings = TextureSettings::new().filter(Filter::Nearest);
+    let ref mut glyphs = GlyphCache::new("assets/FiraSans-Regular.ttf", (), texture_settings)
+        .expect("Could not load font");
+
+    while let Some(e) = events.next(&mut window) {
+        gameboard_controller.event(
+            gameboard_view.settings.position,
+            gameboard_view.settings.size,
+            &e,
+        );
+        if let Some(args) = e.render_args() {
+            gl.draw(args.viewport(), |c, g| {
+                use graphics::clear;
+
+                clear([1.0; 4], g);
+                gameboard_view.draw(&gameboard_controller, glyphs, &c, g);
+            })
+        }
+    }
+}

piston-tutorials/sudoku/static/puzzle-almost-solved.sdm

@@ -0,0 +1 @@
+517962483236847915498351762371695248654218397829734156765129834142583679983476520

piston-tutorials/sudoku/static/puzzle.sdm

@@ -0,0 +1 @@
+016400000200009000400000062070230100100000003003087040960000005000800007000006820