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-rw-r--r--src/toys/euler-golf/css/styles.css81
-rw-r--r--src/toys/euler-golf/index.html80
-rw-r--r--src/toys/euler-golf/js/controls.js33
-rw-r--r--src/toys/euler-golf/js/cx.js308
-rw-r--r--src/toys/euler-golf/js/game.js275
-rw-r--r--src/toys/euler-golf/js/json-ds.js19
-rw-r--r--src/toys/euler-golf/js/modal-vanilla.min.js1
-rw-r--r--src/toys/euler-golf/js/sol.js44
8 files changed, 0 insertions, 841 deletions
diff --git a/src/toys/euler-golf/css/styles.css b/src/toys/euler-golf/css/styles.css
deleted file mode 100644
index 219012d..0000000
--- a/src/toys/euler-golf/css/styles.css
+++ /dev/null
@@ -1,81 +0,0 @@
-body {
- margin: 0;
- padding: 0;
- overflow: scroll;
- font-family: Lucida Console, Lucida Sans Typewriter, monaco,
- Bitstream Vera Sans Mono, monospace;
- width: 100vw;
- height: 100vh;
- background: rgb(238, 174, 202);
- background: radial-gradient(
- circle,
- rgba(238, 174, 202, 1) 0%,
- rgba(148, 187, 233, 1) 100%
- );
-}
-
-.canvas {
- padding: 0;
- margin: auto;
- display: block;
- border: 1px solid black;
-
- width: 100vw;
- height: 100vw;
-}
-
-button {
- border-radius: 5px;
- padding: 5px;
- cursor: pointer;
- margin-left: 5px;
-}
-
-.controls {
- cursor: pointer;
- padding: 12px;
- position: fixed;
- bottom: 0;
- right: 0;
- background-color: rgba(255, 255, 255, 0.8);
- border: 1px solid white;
- border-radius: 8px;
- margin-right: 6px;
- margin-bottom: 6px;
-}
-
-.buttons {
- display: flex;
- justify-content: space-around;
- align-items: center;
-}
-
-.modal {
- display: flex;
- position: absolute;
- left: 50%;
- top: 50%;
- transform: translate(-50%, -50%);
-
- width: 80vw;
- max-width: 500px;
- min-height: 200px;
-
- padding: 12px;
-
- background-color: rgba(255, 255, 255, 0.8);
- border: 1px solid black;
- border-radius: 15px;
-}
-
-.modal-body {
- display: flex;
- justify-content: center;
-}
-
-.slider {
- display: flex;
- justify-content: center;
- align-items: center;
- margin-top: 3px;
-}
diff --git a/src/toys/euler-golf/index.html b/src/toys/euler-golf/index.html
deleted file mode 100644
index 8164823..0000000
--- a/src/toys/euler-golf/index.html
+++ /dev/null
@@ -1,80 +0,0 @@
-<!DOCTYPE html>
-<html>
- <head>
- <title>Euler Golf 2</title>
- <link rel="stylesheet" type="text/css" href="css/styles.css" />
- <meta charset="utf-8">
- </head>
- <body>
- <canvas id="canvas"></canvas>
-
- <div class="controls" id="controls-container">
- <div id="controls" style="display: none">
- <div class="buttons">
- <button id="reset">Reset</button>
- <button id="solve">Solve</button>
- <button id="directions">Directions</button>
- </div>
- <div class="slider">
- <label>Gap</label>
- <input type="range" min="15" max="80" id="gap" />
- </div>
- </div>
- <span id="expand-show">↑↑</span>
- </div>
-
- <div
- id="directions-modal"
- class="modal"
- style="display: none"
- tabindex="-1"
- role="dialog"
- >
- <button
- type="button"
- class="close"
- data-dismiss="modal"
- aria-label="Close"
- >
- <span aria-hidden="true">X</span>
- </button>
-
- <div class="modal-body">
- <div style="margin: 0; display: inline-block">
- <h1 style="text-align: center">Euler Golf 2</h1>
- <p>
- Use the left and right arrow keys as navigation & hover over the
- bottom right corner for controls.
- </p>
- <p>Rules</p>
- <ul>
- <li>
- Every move consists of a 90 degree rotation around your last
- position.
- </li>
- <li>You begin at the point one unit right from the center.</li>
- <li>
- The inital point that you rotate around is the origin (blue).
- </li>
- <li>You must navigate to the target point (white).</li>
- </ul>
- <p>
- Initial game by
- <a href="https://kylehovey.github.io/EulerGolf/">speleo</a>,
- reimplemented & solved by
- <a href="https://github.com/Simponic">simponic</a>.
- </p>
- </div>
- </div>
- </div>
-
- <script src="js/modal-vanilla.min.js"></script>
-
- <script src="js/cx.js"></script>
- <script src="js/json-ds.js"></script>
- <script src="js/sol.js"></script>
-
- <script src="js/game.js"></script>
- <script src="js/controls.js"></script>
- </body>
-</html>
diff --git a/src/toys/euler-golf/js/controls.js b/src/toys/euler-golf/js/controls.js
deleted file mode 100644
index 7f606cc..0000000
--- a/src/toys/euler-golf/js/controls.js
+++ /dev/null
@@ -1,33 +0,0 @@
-document
- .getElementById("controls-container")
- .addEventListener("mouseover", () => {
- document.getElementById("controls").style.display = "block";
- document.getElementById("expand-show").style.display = "none";
- });
-
-document
- .getElementById("controls-container")
- .addEventListener("mouseout", () => {
- document.getElementById("controls").style.display = "none";
- document.getElementById("expand-show").style.display = "inline";
- });
-
-document.getElementById("reset").addEventListener("click", () => {
- state = reset_state(state);
-
- state.target = rand_target(state.rows, state.cols);
-});
-
-document.getElementById("solve").addEventListener("click", () => {
- if (!cx.eq(state.path.at(-2), new cx(0, 0))) state = reset_state(state);
-
- state.solution = sol(state.target);
-});
-
-document
- .getElementById("directions")
- .addEventListener("click", () => directions_modal.show());
-
-document.getElementById("gap").addEventListener("input", function () {
- state.changes.gap = Number(this.value);
-});
diff --git a/src/toys/euler-golf/js/cx.js b/src/toys/euler-golf/js/cx.js
deleted file mode 100644
index 371415d..0000000
--- a/src/toys/euler-golf/js/cx.js
+++ /dev/null
@@ -1,308 +0,0 @@
-// http://www.russellcottrell.com/fractalsEtc/cx.js
-
-class cx {
- static degrees(d) {
- cx._RD = d ? Math.PI / 180 : 1;
- }
- // Math.PI/180 for degrees, 1 for radians
- // applies to i/o (constructor, get/set arg, and toString etc.)
-
- constructor(x, y, polar) {
- if (!polar) {
- this.re = x;
- this.im = y;
- } else {
- y *= cx._RD; // may be radians or degrees
- this.re = x * Math.cos(y);
- this.im = x * Math.sin(y);
- }
- }
-
- get abs() {
- return Math.sqrt(this.re * this.re + this.im * this.im);
- }
-
- set abs(r) {
- var theta = this._arg;
- this.re = r * Math.cos(theta);
- this.im = r * Math.sin(theta);
- }
-
- get arg() {
- // returns radians or degrees, non-negative
- return (
- ((Math.atan2(this.im, this.re) + 2 * Math.PI) % (2 * Math.PI)) / cx._RD
- );
- }
-
- set arg(theta) {
- // may be radians or degrees
- var r = this.abs;
- this.re = r * Math.cos(theta * cx._RD);
- this.im = r * Math.sin(theta * cx._RD);
- }
-
- get _arg() {
- // internal; returns radians
- return Math.atan2(this.im, this.re);
- }
-
- static get i() {
- return new cx(0, 1);
- }
-
- static set i(x) {
- throw new Error("i is read-only");
- }
-
- toString(polar) {
- if (!polar)
- return (
- this.re.toString() +
- (this.im >= 0 ? " + " : " - ") +
- Math.abs(this.im).toString() +
- "i"
- );
- else return this.abs.toString() + " cis " + this.arg.toString();
- }
-
- toPrecision(n, polar) {
- if (!polar)
- return (
- this.re.toPrecision(n) +
- (this.im >= 0 ? " + " : " - ") +
- Math.abs(this.im).toPrecision(n) +
- "i"
- );
- else return this.abs.toPrecision(n) + " cis " + this.arg.toPrecision(n);
- }
-
- toPrecis(n, polar) {
- // trims trailing zeros
- if (!polar)
- return (
- parseFloat(this.re.toPrecision(n)).toString() +
- (this.im >= 0 ? " + " : " - ") +
- parseFloat(Math.abs(this.im).toPrecision(n)).toString() +
- "i"
- );
- else
- return (
- parseFloat(this.abs.toPrecision(n)).toString() +
- " cis " +
- parseFloat(this.arg.toPrecision(n)).toString()
- );
- }
-
- toFixed(n, polar) {
- if (!polar)
- return (
- this.re.toFixed(n) +
- (this.im >= 0 ? " + " : " - ") +
- Math.abs(this.im).toFixed(n) +
- "i"
- );
- else return this.abs.toFixed(n) + " cis " + this.arg.toFixed(n);
- }
-
- toExponential(n, polar) {
- if (!polar)
- return (
- this.re.toExponential(n) +
- (this.im >= 0 ? " + " : " - ") +
- Math.abs(this.im).toExponential(n) +
- "i"
- );
- else return this.abs.toExponential(n) + " cis " + this.arg.toExponential(n);
- }
-
- static getReals(c, d) {
- // when c or d may be simple or complex
- var x, y, u, v;
- if (c instanceof cx) {
- x = c.re;
- y = c.im;
- } else {
- x = c;
- y = 0;
- }
- if (d instanceof cx) {
- u = d.re;
- v = d.im;
- } else {
- u = d;
- v = 0;
- }
- return [x, y, u, v];
- }
-
- static conj(c) {
- return new cx(c.re, -c.im);
- }
-
- static neg(c) {
- return new cx(-c.re, -c.im);
- }
-
- static add(c, d) {
- var a = cx.getReals(c, d);
- var x = a[0];
- var y = a[1];
- var u = a[2];
- var v = a[3];
- return new cx(x + u, y + v);
- }
-
- static sub(c, d) {
- var a = cx.getReals(c, d);
- var x = a[0];
- var y = a[1];
- var u = a[2];
- var v = a[3];
- return new cx(x - u, y - v);
- }
-
- static mult(c, d) {
- var a = cx.getReals(c, d);
- var x = a[0];
- var y = a[1];
- var u = a[2];
- var v = a[3];
- return new cx(x * u - y * v, x * v + y * u);
- }
-
- static div(c, d) {
- var a = cx.getReals(c, d);
- var x = a[0];
- var y = a[1];
- var u = a[2];
- var v = a[3];
- return new cx(
- (x * u + y * v) / (u * u + v * v),
- (y * u - x * v) / (u * u + v * v)
- );
- }
-
- static pow(c, int) {
- if (Number.isInteger(int) && int >= 0) {
- var r = Math.pow(c.abs, int);
- var theta = int * c._arg;
- return new cx(r * Math.cos(theta), r * Math.sin(theta));
- } else return NaN;
- }
-
- static root(c, int, k) {
- if (!k) k = 0;
- if (
- Number.isInteger(int) &&
- int >= 2 &&
- Number.isInteger(k) &&
- k >= 0 &&
- k < int
- ) {
- var r = Math.pow(c.abs, 1 / int);
- var theta = (c._arg + 2 * k * Math.PI) / int;
- return new cx(r * Math.cos(theta), r * Math.sin(theta));
- } else return NaN;
- }
-
- static log(c) {
- return new cx(Math.log(c.abs), c._arg);
- }
-
- static exp(c) {
- var r = Math.exp(c.re);
- var theta = c.im;
- return new cx(r * Math.cos(theta), r * Math.sin(theta));
- }
-
- static sin(c) {
- var a = c.re;
- var b = c.im;
- return new cx(Math.sin(a) * Math.cosh(b), Math.cos(a) * Math.sinh(b));
- }
-
- static cos(c) {
- var a = c.re;
- var b = c.im;
- return new cx(Math.cos(a) * Math.cosh(b), -Math.sin(a) * Math.sinh(b));
- }
-
- static tan(c) {
- return cx.div(cx.sin(c), cx.cos(c));
- }
-
- static asin(c, k) {
- if (!k) k = 0;
- var ic = cx.mult(cx.i, c);
- var c2 = cx.pow(c, 2);
- return cx.mult(
- cx.neg(cx.i),
- cx.log(cx.add(ic, cx.root(cx.sub(1, c2), 2, k)))
- );
- }
-
- static acos(c, k) {
- if (!k) k = 0;
- var c2 = cx.pow(c, 2);
- return cx.mult(
- cx.neg(cx.i),
- cx.log(cx.add(c, cx.mult(cx.i, cx.root(cx.sub(1, c2), 2, k))))
- );
- }
-
- static atan(c) {
- return cx.mult(
- cx.div(cx.i, 2),
- cx.log(cx.div(cx.add(cx.i, c), cx.sub(cx.i, c)))
- );
- }
-
- static sinh(c) {
- var a = c.re;
- var b = c.im;
- return new cx(Math.sinh(a) * Math.cos(b), Math.cosh(a) * Math.sin(b));
- }
-
- static cosh(c) {
- var a = c.re;
- var b = c.im;
- return new cx(Math.cosh(a) * Math.cos(b), Math.sinh(a) * Math.sin(b));
- }
-
- static tanh(c) {
- return cx.div(cx.sinh(c), cx.cosh(c));
- }
-
- static asinh(c, k) {
- if (!k) k = 0;
- var c2 = cx.pow(c, 2);
- return cx.log(cx.add(c, cx.root(cx.add(c2, 1), 2, k)));
- }
-
- static acosh(c, k) {
- if (!k) k = 0;
- var c2 = cx.pow(c, 2);
- return cx.log(cx.add(c, cx.root(cx.sub(c2, 1), 2, k)));
- }
-
- static atanh(c) {
- return cx.mult(cx.div(1, 2), cx.log(cx.div(cx.add(1, c), cx.sub(1, c))));
- }
-
- static copy(c) {
- return new cx(c.re, c.im);
- }
-
- static eq(c, d, epsilon) {
- if (!epsilon) {
- if (c.re == d.re && c.im == d.im) return true;
- } else {
- if (Math.abs(c.re - d.re) < epsilon && Math.abs(c.im - d.im) < epsilon)
- return true;
- }
- return false;
- }
-}
-
-cx.degrees(true); // need to call this
diff --git a/src/toys/euler-golf/js/game.js b/src/toys/euler-golf/js/game.js
deleted file mode 100644
index 5e123a0..0000000
--- a/src/toys/euler-golf/js/game.js
+++ /dev/null
@@ -1,275 +0,0 @@
-const DEFAULTS = {
- max_rows: 80,
- max_cols: 80,
- min_gap: 30,
- angle_multiplier: 10e-4,
-};
-
-const CANVAS = document.getElementById("canvas");
-
-let state = {
- grid_padding: 30,
- gap: DEFAULTS.min_gap,
- canvas: CANVAS,
- ctx: CANVAS.getContext("2d"),
- last_render: 0,
- keys: {},
- changes: {},
-};
-
-// Rendering
-CanvasRenderingContext2D.prototype.circle = function (x, y, r, color) {
- this.beginPath();
- this.arc(x, y, r, 0, Math.PI * 2);
- this.fillStyle = color;
- this.fill();
- this.closePath();
-};
-
-CanvasRenderingContext2D.prototype.line = function (
- { x_pos: x1, y_pos: y1 },
- { x_pos: x2, y_pos: y2 },
- width,
- color,
- cap = "round"
-) {
- this.lineWidth = width;
- this.strokeStyle = color;
- this.lineCap = cap;
-
- this.beginPath();
- this.moveTo(x1, y1);
- this.lineTo(x2, y2);
- this.stroke();
- this.closePath();
-};
-
-CanvasRenderingContext2D.prototype.draw_cartesian_path = function (
- grid_spec,
- cartesian_path,
- width = 2,
- color = "#fff"
-) {
- const path = cartesian_path.map((coord) => grid_to_canvas(coord, grid_spec));
- path.slice(1).forEach((coord, i) => {
- this.line(path[i], coord, width, color);
- });
-};
-
-CanvasRenderingContext2D.prototype.do_grid = function (
- rows,
- cols,
- draw_at_grid_pos = (ctx, x, y) => ctx.circle(x, y, 10, "#44ff44")
-) {
- for (let y = 0; y < rows; y++) {
- for (let x = 0; x < cols; x++) {
- draw_at_grid_pos(this, x, y);
- }
- }
-};
-
-CanvasRenderingContext2D.prototype.cartesian_grid = function (
- rows,
- cols,
- grid_spec,
- circle_spec_at_coords = (_x, _y) => ({ radius: 5, color: "#000" })
-) {
- this.do_grid(rows, cols, (ctx, x, y) => {
- const { x_pos, y_pos } = grid_to_canvas({ x, y }, grid_spec);
- const { radius, color } = circle_spec_at_coords(x, y);
-
- ctx.circle(x_pos, y_pos, radius, color);
- });
-};
-
-// Utilities
-const move = (prev, curr, c) => cx.add(prev, cx.mult(c, cx.sub(curr, prev)));
-
-const rand_between = (min, max) =>
- Math.floor(Math.random() * (max - min + 1)) + min;
-
-const rand_target = (rows, cols) => {
- const r = Math.floor((rows - 1) / 2);
- const c = Math.floor((cols - 1) / 2);
- const res = new cx(rand_between(-c, c), rand_between(-r, r));
- if (!sol(res)) return rand_target(rows, cols);
-
- return res;
-};
-
-const calculate_grid_spec = ({ rows, cols, width, height, grid_padding }) => {
- const dx = (width - 2 * grid_padding) / cols;
- const dy = (height - 2 * grid_padding) / rows;
-
- return {
- dx,
- dy,
- start_x: grid_padding + dx / 2,
- start_y: grid_padding + dy / 2,
- };
-};
-
-const grid_to_canvas = ({ x, y }, { dx, dy, start_x, start_y }) => ({
- x_pos: x * dx + start_x,
- y_pos: y * dy + start_y,
-});
-
-const complex_to_grid = (c, rows, cols) => {
- const { re, im } = c;
- return {
- x: re + Math.floor(cols / 2),
- y: Math.floor(rows / 2) - im,
- };
-};
-
-// Game loop
-
-const maybe_add_state_angle_move = ({ angle } = state) => {
- if (angle.im <= -1 || angle.im >= 1) {
- angle.im = angle.im <= -1 ? -1 : 1;
- state.path.push(move(state.path.at(-2), state.path.at(-1), angle));
- state.angle = new cx(0, 0);
- }
- return state;
-};
-
-const handle_input = (state, dt) => {
- if (state.keys.ArrowLeft) {
- state.angle.im += DEFAULTS.angle_multiplier * dt;
- } else if (state.keys.ArrowRight) {
- state.angle.im -= DEFAULTS.angle_multiplier * dt;
- }
- state = maybe_add_state_angle_move(state);
-};
-
-const render = ({ width, height, ctx, rows, cols, target, gap } = state) => {
- ctx.clearRect(0, 0, width, height);
- ctx.fillStyle = "rgba(0, 0, 0, 0)";
- ctx.fillRect(0, 0, width, height);
-
- const grid_spec = calculate_grid_spec(state);
-
- const curr = state.path.at(-1);
- const prev = state.path.at(-2);
-
- const v_diff = cx.sub(curr, prev);
- const theta = (state.angle.im * Math.PI) / 2;
-
- const angle_re = Math.cos(theta) * v_diff.re - Math.sin(theta) * v_diff.im;
- const angle_im = Math.sin(theta) * v_diff.re + Math.cos(theta) * v_diff.im;
-
- ctx.draw_cartesian_path(grid_spec, [
- ...state.path.map((c) => complex_to_grid(c, rows, cols)),
- complex_to_grid(cx.add(new cx(angle_re, angle_im), prev), rows, cols),
- ]);
-
- if (!(state.angle.im == state.angle.re && state.angle.re == 0)) {
- // Draw path to next player's target
- const [a, b] = [
- curr,
- move(prev, curr, new cx(0, state.angle.im < 0 ? -1 : 1)),
- ].map((c) => grid_to_canvas(complex_to_grid(c, rows, cols), grid_spec));
-
- ctx.line(a, b, 6, "rgba(127, 127, 127, 0.3)");
- }
-
- const grid_target = complex_to_grid(target, rows, cols);
- ctx.cartesian_grid(rows, cols, grid_spec, (x, y) => {
- if (x == Math.floor(cols / 2) && y == Math.floor(rows / 2)) {
- return {
- radius: 7,
- color: "#2f9c94",
- };
- } else if (x == grid_target.x && y == grid_target.y) {
- return {
- radius: 8,
- color: "#fff",
- };
- } else {
- return {
- radius: 3,
- color: `rgb(${255 * (x / cols)}, 100, 100)`, // todo: animate with last_render
- };
- }
- });
-
- // Render gap value in slider
- document.getElementById("gap").value = gap;
-};
-
-const loop = (now) => {
- const dt = now - state.last_render;
- state.changes.last_render = now;
-
- if (Object.keys(state.changes).length > 0) {
- state = { ...state, ...state.changes };
-
- if (state.changes.width || state.changes.height || state.changes.gap) {
- state.rows = Math.floor(state.height / state.gap);
- state.cols = Math.floor(state.width / state.gap);
- }
-
- state.changes = {};
- }
-
- if (!state.target) state.target = rand_target(state.rows, state.cols);
-
- if (!state.solution) {
- handle_input(state, dt);
- } else {
- if (!state?.solution.length) {
- delete state.solution;
- } else {
- state.angle.im +=
- (state.solution[0] === "-" ? 1 : -1) * DEFAULTS.angle_multiplier * dt;
-
- state = maybe_add_state_angle_move(state);
-
- if (cx.eq(state.angle, new cx(0, 0))) state.solution.shift();
- }
- }
- render(state);
- requestAnimationFrame(loop);
-};
-
-const reset_state = ({ rows, cols } = state) => ({
- ...state,
- solution: null,
- path: [new cx(0, 0), new cx(1, 0)],
- angle: new cx(0, 0),
-});
-
-// DOM
-const directions_modal = new Modal({
- el: document.getElementById("directions-modal"),
-});
-
-const on_resize = () => {
- CANVAS.width = document.body.clientWidth;
- CANVAS.height = document.body.clientHeight;
- state.changes.width = CANVAS.width;
- state.changes.height = CANVAS.height;
-};
-
-const on_keyup = (e) => {
- delete state.keys[e.key];
-};
-
-const on_keydown = (e) => {
- state.keys[e.key] = true;
-};
-
-window.addEventListener("resize", on_resize);
-window.addEventListener("keydown", on_keydown);
-window.addEventListener("keyup", on_keyup);
-
-// main
-on_resize();
-state = reset_state(state);
-
-if (!sessionStorage.getItem("seen-instructions")) {
- directions_modal.show();
- sessionStorage.setItem("seen-instructions", true);
-}
-
-requestAnimationFrame(loop);
diff --git a/src/toys/euler-golf/js/json-ds.js b/src/toys/euler-golf/js/json-ds.js
deleted file mode 100644
index dc7e88e..0000000
--- a/src/toys/euler-golf/js/json-ds.js
+++ /dev/null
@@ -1,19 +0,0 @@
-class JSONSet {
- items = new Set();
-
- constructor(initial) {
- if (Array.isArray(initial)) {
- initial.map((x) => this.apply_set_function("add", x));
- } else {
- this.apply_set_function("add", initial);
- }
-
- ["add", "has", "remove"].forEach(
- (f_name) => (this[f_name] = (x) => this.apply_set_function(f_name, x))
- );
- }
-
- apply_set_function(f_name, x) {
- return this.items[f_name](JSON.stringify(x));
- }
-}
diff --git a/src/toys/euler-golf/js/modal-vanilla.min.js b/src/toys/euler-golf/js/modal-vanilla.min.js
deleted file mode 100644
index 0d314c7..0000000
--- a/src/toys/euler-golf/js/modal-vanilla.min.js
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/src/toys/euler-golf/js/sol.js b/src/toys/euler-golf/js/sol.js
deleted file mode 100644
index b4e527f..0000000
--- a/src/toys/euler-golf/js/sol.js
+++ /dev/null
@@ -1,44 +0,0 @@
-const DEPTH = 15;
-
-const DIRECTION = {
- 0: new cx(0, 1),
- 1: new cx(0, -1),
-};
-
-const construct_moves = (curr, prev) =>
- Object.keys(DIRECTION).map((x) => move(curr, prev, DIRECTION[x]));
-
-const backtrack = (local_index, depth) =>
- local_index
- .toString(2)
- .padStart(depth, "0")
- .split("")
- .map((direction) => (Number(direction) ? "+" : "-"));
-
-const sol = (target, start_from = new cx(0, 0), start_to = new cx(1, 0)) => {
- const next_moves = construct_moves(start_from, start_to);
- const solved_in_first_move = next_moves.findIndex((move) =>
- cx.eq(move, target)
- );
- if (solved_in_first_move != -1) return backtrack(solved_in_first_move, 1);
-
- let moves = [start_to, ...next_moves];
- let curr_depth = 2;
- while (curr_depth < DEPTH) {
- for (let i = 0; i < Math.pow(2, curr_depth); i++) {
- const direction = DIRECTION[Number(i.toString(2).at(-1))];
- // Current element is at i >> 1 + the offset for the previous group (which is
- // the sum of the geometric series 2**n until curr_depth - 1)
- const current_i = (i >> 1) + (1 - Math.pow(2, curr_depth - 1)) / (1 - 2);
- const previous_i = (i >> 2) + (1 - Math.pow(2, curr_depth - 2)) / (1 - 2);
-
- const new_move = move(moves[previous_i], moves[current_i], direction);
-
- moves.push(new_move);
- if (cx.eq(new_move, target)) return backtrack(i, curr_depth);
- }
- curr_depth++;
- }
-
- return null;
-};
generated by cgit v1.3 (git 2.53.0) at 2026-08-13 21:46:45 +0000