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main.html
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<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
* {
margin: 0;
padding: 0;
}
body {
margin: 1em;
display: flex;
flex-direction: column;
font-size: 5vh;
}
.board {
display: grid;
grid-template-rows: 12vh 12vh 12vh;
grid-template-columns: 12vh 12vh 12vh;
justify-self: center; /* 横方向中央揃え */
align-self: center; /* 縦方向中央揃え */
}
.cell {
position: relative;
background-size: cover;
background-position: center;
font-size: 0;
border: 0.1px solid black;
}
.btn {
display: flex;
align-items: center;
justify-content: center;
}
#btnStart,
#btnManualStart {
font-family: 'Courier Prime', monospace;
width: 36vh;
padding: 1em;
font-size: 2vh;
visibility: visible;
font-weight: bold;
}
#btnAuto,
#btnAutoAStar,
#btnStop,
#btnReturn,
#btnAutoBFS,
#btnAutoDFS {
font-family: 'Courier Prime', monospace;
width: 36vh;
padding: 1em;
font-size: 2vh;
visibility: hidden;
font-weight: bold;
}
.message {
display: flex;
align-items: center;
justify-content: center;
}
.highlight {
border: 2px solid red;
}
</style>
<script>
let cells = null; // セル配列
let mode;
let autoInterval; // Autoボタン用のインターバル
const WAIT = Symbol(); // 待機
const GAME = Symbol(); // ゲーム中
let ManualFlag = false;
// ヒューリスティック値を計算する関数
function calculateHeuristicForBoard(board) {
let heuristic = 0;
for (let i = 0; i < board.length; i++) {
const tile = board[i];
const targetPosition = (tile === 0) ? board.length - 1 : tile - 1;
const currentRow = Math.floor(i / 3);
const currentCol = i % 3;
const targetRow = Math.floor(targetPosition / 3);
const targetCol = targetPosition % 3;
heuristic += Math.abs(currentRow - targetRow) + Math.abs(currentCol - targetCol);
}
return heuristic;
}
// ヒューリスティック値に基づいてタイルをハイライトする関数
function highlightBestMove() {
const emptyIndex = Array.from(cells).findIndex(cell => cell.textContent === "");
const edgeLength = Math.sqrt(cells.length);
const emptyI = Math.floor(emptyIndex / edgeLength);
const emptyJ = emptyIndex % edgeLength;
let minHeuristic = Infinity;
let bestMoveIndex = -1;
cells.forEach((cell, index) => {
cell.classList.remove("highlight");
const tileValue = parseInt(cell.textContent) || 0;
const currentI = Math.floor(index / edgeLength);
const currentJ = index % edgeLength;
// 空白セルの隣接セルのみチェック
if ((Math.abs(currentI - emptyI) === 1 && currentJ === emptyJ) ||
(Math.abs(currentJ - emptyJ) === 1 && currentI === emptyI)) {
let newBoard = Array.from(cells, c => parseInt(c.textContent) || 0);
newBoard[emptyIndex] = tileValue;
newBoard[index] = 0;
const heuristicValue = calculateHeuristicForBoard(newBoard);
if (heuristicValue < minHeuristic) {
minHeuristic = heuristicValue;
bestMoveIndex = index;
}
}
});
if (bestMoveIndex !== -1) {
cells[bestMoveIndex].classList.add("highlight");
}
}
// セルを入れ替える
function swapCell(x, y) {
console.log("入れ替え.");
[cells[x].textContent, cells[y].textContent] = [cells[y].textContent, cells[x].textContent];
[cells[x].style.backgroundImage, cells[y].style.backgroundImage] = [cells[y].style.backgroundImage, cells[x].style.backgroundImage];
// クリアしたか？
checkClear();
}
// セルを入れ替える
function swapCellManual(x, y) {
console.log("入れ替え.");
[cells[x].textContent, cells[y].textContent] = [cells[y].textContent, cells[x].textContent];
[cells[x].style.backgroundImage, cells[y].style.backgroundImage] = [cells[y].style.backgroundImage, cells[x].style.backgroundImage];
// クリアしたか？
highlightBestMove();
checkClear();
}
// セルが入れ替え可能かチェックする
function checkCell(number) {
console.log(ManualFlag)
if (number >= 3 && cells[number - 3].textContent === "") { // 上と入れ替え
if (ManualFlag) {
swapCellManual(number, number - 3);
} else {
swapCell(number, number - 3);
}
}
if (number <= 5 && cells[number + 3].textContent === "") { // 下と入れ替え
if (ManualFlag) {
swapCellManual(number, number + 3);
} else {
swapCell(number, number + 3);
}
}
if (number % 3 !== 2 && cells[number + 1].textContent === "") { // 右と入れ替え
if (ManualFlag) {
swapCellManual(number, number + 1);
} else {
swapCell(number, number + 1);
}
}
if (number % 3 !== 0 && cells[number - 1].textContent === "") { // 左と入れ替え
if (ManualFlag) {
swapCellManual(number, number - 1);
} else {
swapCell(number, number - 1);
}
}
}
// クリアしたか？
function checkClear() {
if (mode === GAME) {
// 1~8に並んでいるか？
let i = 0;
for (; i < cells.length; i++) {
let value = Number(cells[i].textContent);
console.log("textContent: " + value);
if (value !== (i + 1)) break;
}
// 並んでいればクリア！
if (i === 8) {
mode = WAIT;
document.querySelector(".message").textContent = "CLEAR!!";
clearInterval(autoInterval); // クリア時にAutoの動作を停止
clearHighlights(); // ハイライトを消す
}
}
}
// ハイライトをクリアする関数
function clearHighlights() {
cells.forEach(cell => {
cell.classList.remove("highlight");
});
}
// 起動時の処理
window.addEventListener("load", () => {
// ゲームの状態
mode = WAIT;
// 9つのセルを取得
cells = document.querySelectorAll(".cell");
// セルのイベントを設定
for (let cell of cells) {
cell.addEventListener("click", (e) => {
// セルの番号を取得（data-numberプロパティ）
const number = Number(e.currentTarget.dataset.number);
console.log("cells[" + number + "] Click.");
// セルが入れ替え可能か？
checkCell(number);
}, false);
}
// スタートボタン
const btnStart = document.getElementById("btnStart");
const btnManualStart = document.getElementById("btnManualStart");
// Autoボタン
const btnAuto = document.getElementById("btnAuto");
// AutoAStarボタン
const btnAutoAStar = document.getElementById("btnAutoAStar");
const btnStop = document.getElementById("btnStop");
const btnReturn = document.getElementById("btnReturn");
const btnAutoBFS = document.getElementById("btnAutoBFS");
const btnAutoDFS = document.getElementById("btnAutoDFS");
btnManualStart.addEventListener("click", () => {
const shuffleOption = confirm("このまま始めますか？\n「OK」で現在の盤面から、キャンセルでシャッフルして始めます。");
document.querySelector(".message").textContent = shuffleOption ? "現在の盤面から開始" : "シャッフルして開始";
// シャッフルまたは現在の盤面からゲームを開始
startGame(!shuffleOption);
ManualFlag = true;
console.log(ManualFlag)
btnReturn.style.visibility = "visible";
btnStart.style.visibility = "hidden";
btnManualStart.style.visibility = "hidden";
highlightBestMove();
checkClear();
}, false);
btnAutoBFS.addEventListener("click", () => {
document.querySelector(".message").textContent = "BFS"
autoSolveBFS()
});
btnAutoDFS.addEventListener("click", () => {
document.querySelector(".message").textContent = "DFS"
autoSolveDFS()
});
btnReturn.addEventListener("click", () => {
document.querySelector(".message").textContent = ""
btnStart.style.visibility = "visible";
btnManualStart.style.visibility = "visible";
btnAuto.style.visibility = "hidden";
btnAutoAStar.style.visibility = "hidden";
btnStop.style.visibility = "hidden";
btnReturn.style.visibility = "hidden";
btnAutoDFS.style.visibility = "hidden";
btnAutoBFS.style.visibility = "hidden";
ManualFlag = false;
clearInterval(autoInterval);
clearHighlights(); // ハイライトを消す
});
btnStop.addEventListener("click", () => {
document.querySelector(".message").textContent = "Stop";
clearInterval(autoInterval); //動作を停止
});
btnAutoAStar.addEventListener("click", () => {
document.querySelector(".message").textContent = "AutoAStar";
autoSolveAStar();
});
btnAuto.addEventListener("click", () => {
document.querySelector(".message").textContent = "Auto";
// インターバル設定
autoInterval = setInterval(() => {
const r = Math.floor(Math.random() * 9);
checkCell(r);
checkClear();
}, 200);
});
btnStart.addEventListener("click", () => {
const shuffleOption = confirm("このまま始めますか？\n「OK」で現在の盤面から、キャンセルでシャッフルして始めます。");
document.querySelector(".message").textContent = shuffleOption ? "現在の盤面から開始" : "シャッフルして開始";
// シャッフルまたは現在の盤面からゲームを開始
startGame(!shuffleOption);
btnStart.style.visibility = "hidden";
btnManualStart.style.visibility = "hidden";
btnAuto.style.visibility = "visible";
btnAutoAStar.style.visibility = "visible";
btnStop.style.visibility = "visible";
btnReturn.style.visibility = "visible";
btnAutoBFS.style.visibility = "visible";
btnAutoDFS.style.visibility = "visible";
checkClear();
}, false);
});
// ゲーム開始処理
function startGame(shuffle) {
// シャッフルする場合
if (shuffle) {
shuffleBoard();
}
// ゲーム開始
mode = GAME;
}
// シャッフル処理
function shuffleBoard() {
// シャッフル
for (let i = 0; i < 1000; i++) {
const r = Math.floor(Math.random() * 9);
checkCell(r);
}
}
function AStarSolver(initialState) {
class Node {
constructor(board, pre = null, action = null) {
this.board = board;
this.edgeLength = Math.sqrt(board.length);
this.pre = pre;
this.action = action;
this.cost = pre ? pre.cost + 1 : 0;
this.heuristic = this.getHeuristic();
this.score = this.cost + this.heuristic;
}
getHeuristic() {
let ret = 0;
for (let i = 0; i < this.edgeLength; i++) {
for (let j = 0; j < this.edgeLength; j++) {
const t = this.board[i * this.edgeLength + j] - 1;
const target = t === -1 ? this.board.length - 1 : t;
const targetI = Math.floor(target / this.edgeLength);
const targetJ = target % this.edgeLength;
ret += Math.abs(i - targetI) + Math.abs(j - targetJ);
}
}
return ret;
}
}
function isSameBoard(board1) {
// 解の配置を定義
const solution = [1, 2, 3, 4, 5, 6, 7, 8, 0]; // 0 は空白として扱う
// ソートして比較
return board1.join() === solution.join();
}
function isBoardInClosedList(board, closedList) {
return closedList.some(node => isSameBoard(node.board, board));
}
function isBoardInOpenList(board, openList) {
return openList.some(node => isSameBoard(node.board, board));
}
function getNodeWithLowestScore(openList) {
return openList.reduce((minNode, currentNode) => (currentNode.score < minNode.score ? currentNode : minNode), openList[0]);
}
function getNeighbors(node) {
const neighbors = [];
const emptyIndex = node.board.indexOf(0);
console.log(emptyIndex)
function isValidMove(i, j) {
return i >= 0 && i < node.edgeLength && j >= 0 && j < node.edgeLength;
}
const emptyI = Math.floor(emptyIndex / node.edgeLength);
const emptyJ = emptyIndex % node.edgeLength;
const directions = [
{ di: -1, dj: 0 }, // 上
{ di: 1, dj: 0 }, // 下
{ di: 0, dj: -1 }, // 左
{ di: 0, dj: 1 } // 右
];
for (const dir of directions) {
const newI = emptyI + dir.di;
const newJ = emptyJ + dir.dj;
if (isValidMove(newI, newJ)) {
const neighborBoard = [...node.board];
const newIndex = newI * node.edgeLength + newJ;
[neighborBoard[emptyIndex], neighborBoard[newIndex]] = [neighborBoard[newIndex], neighborBoard[emptyIndex]];
neighbors.push(new Node(neighborBoard, node, dir));
}
}
return neighbors;
}
const startNode = new Node(initialState);
const openList = [startNode];
console.log(openList[0])
const closedList = [];
let searchCount = 0;
while (openList.length > 0) {
const currentNode = getNodeWithLowestScore(openList);
if (isSameBoard(currentNode.board)) {
// 解が見つかった
const actions = [];
let backtraceNode = currentNode;
console.log(backtraceNode.pre);
while (backtraceNode.pre) {
actions.unshift(backtraceNode.action);
console.log(actions);
backtraceNode = backtraceNode.pre;
}
return { solved: true, actions, searchCount };
}
openList.splice(openList.indexOf(currentNode), 1);
console.log(openList)
closedList.push(currentNode);
console.log(closedList)
if (searchCount > 10000) {
// サーチ回数が閾値を超えた場合、解が見つからないことを示すために変更
return { solved: false, actions: [], searchCount };
}
const neighbors = getNeighbors(currentNode);
for (const neighbor of neighbors) {
searchCount++;
if (isBoardInClosedList(neighbor.board, closedList)) {
continue;
}
const existingNode = openList.find(node => isSameBoard(node.board, neighbor.board));
if (!existingNode || neighbor.cost < existingNode.cost) {
openList.push(neighbor);
}
}
}
return { solved: false, actions: [], searchCount };
}
// Function to perform a sequence of actions on the puzzle
function performActions(actions) {
actions.forEach(action => {
const emptyCellIndex = Array.from(cells).findIndex(cell => cell.textContent === "");
const targetIndex = getTargetIndex(emptyCellIndex, action);
swapCell(emptyCellIndex, targetIndex);
});
}
// Function to get the target index based on the action
function getTargetIndex(emptyIndex, action) {
const edgeLength = Math.sqrt(cells.length);
const [i, j] = [Math.floor(emptyIndex / edgeLength), emptyIndex % edgeLength];
if (action.di === -1) return (i - 1) * edgeLength + j; // Up
if (action.di === 1) return (i + 1) * edgeLength + j; // Down
if (action.dj === -1) return i * edgeLength + (j - 1); // Left
if (action.dj === 1) return i * edgeLength + (j + 1); // Right
return emptyIndex; // Should not happen
}
function autoSolveAStar() {
clearInterval(autoInterval); // 他の自動動作が実行中であれば停止
const initialState = Array.from(cells, cell => parseInt(cell.textContent) || 0);
const { solved, actions, searchCount } = AStarSolver(initialState);
if (solved) {
mode = WAIT;
document.querySelector(".message").textContent = `A* ${searchCount}手で解けました!!`;
console.log(`A* found a solution in ${searchCount} steps.`);
let step = 0;
autoInterval = setInterval(() => {
if (step < actions.length) {
const action = actions[step];
const emptyCellIndex = Array.from(cells).findIndex(cell => cell.textContent === "");
const targetIndex = getTargetIndex(emptyCellIndex, action);
swapCell(emptyCellIndex, targetIndex);
step++;
} else {
clearInterval(autoInterval); // Stop the interval when all steps are completed
}
}, 500);
} else {
document.querySelector(".message").textContent = `この盤面は解けません`;
console.log(`A* did not find a solution after ${searchCount} steps.`);
}
}
function autoSolveBFS() {
clearInterval(autoInterval); // 他の自動動作が実行中であれば停止
const initialState = Array.from(cells, cell => parseInt(cell.textContent) || 0);
const { solved, actions, searchCount } = breadthFirstSearch(initialState);
if (solved) {
mode = WAIT;
document.querySelector(".message").textContent = `BFS ${searchCount}手で解けました!!`;
console.log(`BFS found a solution in ${searchCount} steps.`);
let step = 0;
autoInterval = setInterval(() => {
if (step < actions.length) {
const action = actions[step];
const emptyCellIndex = Array.from(cells).findIndex(cell => cell.textContent === "");
const targetIndex = getTargetIndex(emptyCellIndex, action);
swapCell(emptyCellIndex, targetIndex);
step++;
} else {
clearInterval(autoInterval); // Stop the interval when all steps are completed
}
}, 500);
} else {
document.querySelector(".message").textContent = `この盤面は解けません`;
console.log(`BFS did not find a solution after ${searchCount} steps.`);
}
}
function breadthFirstSearch(initialState) {
const queue = [{ board: initialState, actions: [] }];
const visited = new Set([initialState.toString()]);
let searchCount = 0;
while (queue.length > 0) {
const currentNode = queue.shift(); // キューからノードを取り出す
const currentBoard = currentNode.board;
if (isSameBoard(currentBoard)) {
// 解が見つかった場合
return { solved: true, actions: currentNode.actions, searchCount };
}
const emptyIndex = currentBoard.indexOf(0);
const neighbors = getNeighbors(currentNode);
if (searchCount > 20000) {
// サーチ回数が閾値を超えた場合、解が見つからないことを示すために変更
return { solved: false, actions: [], searchCount };
}
for (const neighbor of neighbors) {
const neighborBoard = neighbor.board;
const neighborActions = [...currentNode.actions, neighbor.action];
if (!visited.has(neighborBoard.toString())) {
visited.add(neighborBoard.toString());
queue.push({ board: neighborBoard, actions: neighborActions });
}
}
searchCount++;
}
// キューが空になり、解が見つからなかった場合
return { solved: false, actions: [], searchCount };
}
function getNeighbors(node) {
const neighbors = [];
const emptyIndex = node.board.indexOf(0);
const edgeLength = Math.sqrt(node.board.length);
function isValidMove(i, j) {
return i >= 0 && i < edgeLength && j >= 0 && j < edgeLength;
}
const emptyI = Math.floor(emptyIndex / edgeLength);
const emptyJ = emptyIndex % edgeLength;
const directions = [
{ di: -1, dj: 0 }, // 上
{ di: 1, dj: 0 }, // 下
{ di: 0, dj: -1 }, // 左
{ di: 0, dj: 1 } // 右
];
for (const dir of directions) {
const newI = emptyI + dir.di;
const newJ = emptyJ + dir.dj;
if (isValidMove(newI, newJ)) {
const neighborBoard = [...node.board];
const newIndex = newI * edgeLength + newJ;
[neighborBoard[emptyIndex], neighborBoard[newIndex]] = [neighborBoard[newIndex], neighborBoard[emptyIndex]];
neighbors.push({ board: neighborBoard, action: dir });
}
}
return neighbors;
}
function isSameBoard(board) {
// 解の配置を定義
const solution = [1, 2, 3, 4, 5, 6, 7, 8, 0]; // 0 は空白として扱う
// ソートして比較
return board.join() === solution.join();
}
function autoSolveDFS() {
clearInterval(autoInterval); // 他の自動動作が実行中であれば停止
const initialState = Array.from(cells, cell => parseInt(cell.textContent) || 0);
const { solved, actions, searchCount } = depthFirstSearch(initialState);
if (solved) {
mode = WAIT;
document.querySelector(".message").textContent = `DFS ${searchCount}手で解けました!!`;
console.log(`DFS found a solution in ${searchCount} steps.`);
let step = 0;
autoInterval = setInterval(() => {
if (step < actions.length) {
const action = actions[step];
const emptyCellIndex = Array.from(cells).findIndex(cell => cell.textContent === "");
const targetIndex = getTargetIndex(emptyCellIndex, action);
swapCell(emptyCellIndex, targetIndex);
step++;
} else {
clearInterval(autoInterval); // Stop the interval when all steps are completed
}
}, 500);
} else {
document.querySelector(".message").textContent = `この盤面は解けません`;
console.log(`DFS did not find a solution after ${searchCount} steps.`);
}
}
function depthFirstSearch(initialState) {
const stack = [{ board: initialState, actions: [] }];
const visited = new Set([initialState.toString()]);
let searchCount = 0;
while (stack.length > 0) {
const currentNode = stack.pop(); // スタックからノードを取り出す
const currentBoard = currentNode.board;
if (isSameBoard(currentBoard)) {
// 解が見つかった場合
return { solved: true, actions: currentNode.actions, searchCount };
}
const emptyIndex = currentBoard.indexOf(0);
const neighbors = getNeighbors(currentNode);
if (searchCount > 30000) {
// サーチ回数が閾値を超えた場合、解が見つからないことを示すために変更
return { solved: false, actions: [], searchCount };
}
for (const neighbor of neighbors) {
const neighborBoard = neighbor.board;
const neighborActions = [...currentNode.actions, neighbor.action];
if (!visited.has(neighborBoard.toString())) {
visited.add(neighborBoard.toString());
stack.push({ board: neighborBoard, actions: neighborActions });
}
}
searchCount++;
}
// スタックが空になり、解が見つからなかった場合
return { solved: false, actions: [], searchCount };
}
</script>
<title>8puzzle</title>
</head>
<body>
<div class="board">
<div class="cell" data-number="0" style="background-image: url('penguin-9.jpg');">1</div>
<div class="cell" data-number="1" style="background-image: url('penguin-8.jpg');">2</div>
<div class="cell" data-number="2" style="background-image: url('penguin-7.jpg');">3</div>
<div class="cell" data-number="3" style="background-image: url('penguin-6.jpg');">4</div>
<div class="cell" data-number="4" style="background-image: url('penguin-5.jpg');">5</div>
<div class="cell" data-number="5" style="background-image: url('penguin-4.jpg');">6</div>
<div class="cell" data-number="6" style="background-image: url('penguin-3.jpg');">7</div>
<div class="cell" data-number="7" style="background-image: url('penguin-2.jpg');">8</div>
<div class="cell" data-number="8" style="background-image: url('black.jpg');"></div>
</div>
<div class="btn"><button id="btnStart">AUTO START</button></div>
<div class="btn"><button id="btnManualStart">Manual START</button></div>
<div class="btn"><button id="btnReturn">Return StartScreen</button></div>
<div class="btn"><button id="btnAuto">RANDOM</button></div>
<div class="btn"><button id="btnAutoAStar">AStar</button></div>
<div class="btn"><button id="btnAutoBFS">BFS</button></div>
<div class="btn"><button id="btnAutoDFS">DFS</button></div>
<div class="btn"><button id="btnStop">Stop</button></div>
<div class="message"></div>
</body>
</html>