MazeSolver/MazeSolver.html at main · opming7788/MazeSolver · GitHub

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<!DOCTYPE html>
<html lang="zh-Hant">
  <head>
    <meta charset="UTF-8" />
    <title>迷宮產生器</title>
    <style>
      body {
        text-align: center;
        font-family: Arial;
      }
      canvas {
        border: 1px solid black;
        background-color: white;
      }
      button {
        margin: 10px;
        padding: 10px 20px;
      }
    </style>
  </head>
  <body>
    <h1>迷宮產生器（DFS+BFS）</h1>
    <canvas id="mazeCanvas" width="420" height="420"></canvas><br />
    <button id="generateButton" onclick="generateMaze()">產生迷宮</button>
    <button id="solveMaze" onclick="solveMaze()">解迷宮</button>

    <script>
      const canvas = document.getElementById("mazeCanvas");
      const ctx = canvas.getContext("2d");
      const cellSize = 20;
      const cols = 21;
      const rows = 21;
      let maze = [];

      const start = { x: 1, y: 1 };
      const end = { x: cols - 2, y: rows - 2 };

      function initMaze() {
        maze = Array.from({ length: rows }, () => Array(cols).fill("#"));
      }

      function drawMaze() {
        for (let y = 0; y < rows; y++) {
          for (let x = 0; x < cols; x++) {
            if (maze[y][x] === "#") ctx.fillStyle = "black";
            else if (maze[y][x] === ".") ctx.fillStyle = "orange";
            else if (maze[y][x] === "S") ctx.fillStyle = "green";
            else if (maze[y][x] === "E") ctx.fillStyle = "red";
            else ctx.fillStyle = "white";

            ctx.fillRect(x * cellSize, y * cellSize, cellSize, cellSize);
          }
        }
      }

      function shuffle(array) {
        for (let i = array.length - 1; i > 0; i--) {
          const j = Math.floor(Math.random() * (i + 1));
          [array[i], array[j]] = [array[j], array[i]];
        }
      }

      async function generateMazeDFS(x, y) {
        maze[y][x] = " ";
        drawMaze();
        await sleep(100);

        const directions = [
          { dx: 0, dy: -2 },
          { dx: 2, dy: 0 },
          { dx: 0, dy: 2 },
          { dx: -2, dy: 0 },
        ];
        shuffle(directions);

        for (const { dx, dy } of directions) {
          const nx = x + dx;
          const ny = y + dy;
          if (
            nx > 0 &&
            nx < cols - 1 &&
            ny > 0 &&
            ny < rows - 1 &&
            maze[ny][nx] === "#"
          ) {
            maze[y + dy / 2][x + dx / 2] = " ";

            await generateMazeDFS(nx, ny);
          }
        }
      }

      function sleep(ms) {
        return new Promise((resolve) => setTimeout(resolve, ms));
      }

      function toggleButtons(disabled) {
        const buttons = document.querySelectorAll("button");
        buttons.forEach((button) => {
          button.disabled = disabled;
        });
      }

      async function generateMaze() {
        toggleButtons(true); // 禁用所有按鈕
        initMaze();
        await generateMazeDFS(1, 1);
        toggleButtons(false); // 啟用所有按鈕
      }

      function solveMaze() {
        const queue = [];
        const visited = Array.from({ length: rows }, () =>
          Array(cols).fill(false)
        );
        const parent = Array.from({ length: rows }, () =>
          Array(cols).fill(null)
        );
        const directions = [
          { dx: 0, dy: -1 },
          { dx: 1, dy: 0 },
          { dx: 0, dy: 1 },
          { dx: -1, dy: 0 },
        ];

        queue.push(start);
        visited[start.y][start.x] = true;

        while (queue.length > 0) {
          const { x, y } = queue.shift();
          if (x === end.x && y === end.y) break;

          for (const { dx, dy } of directions) {
            const nx = x + dx;
            const ny = y + dy;
            if (
              nx >= 0 &&
              ny >= 0 &&
              nx < cols &&
              ny < rows &&
              maze[ny][nx] === " " &&
              !visited[ny][nx]
            ) {
              visited[ny][nx] = true;
              parent[ny][nx] = { x, y };
              queue.push({ x: nx, y: ny });
            }
          }
        }

        let path = [];
        // 從終點回推到起點
        let cur = end;
        while (cur.x !== start.x || cur.y !== start.y) {
          maze[cur.y][cur.x] = ".";
          path.push(cur);
          cur = parent[cur.y][cur.x];
        }
        maze[start.y][start.x] = "S";
        maze[end.y][end.x] = "E";
        path.shift(); // 移除起點
        path.reverse(); // 反轉路徑以便從起點到終點繪製

        drawparentMaze(path);
        // drawMaze();
      }

      function drawparentMaze(path) {
        ctx.fillStyle = "green";
        ctx.fillRect(
          start.x * cellSize,
          start.y * cellSize,
          cellSize,
          cellSize
        );
        ctx.fillStyle = "red";
        ctx.fillRect(end.x * cellSize, end.y * cellSize, cellSize, cellSize);

        path.forEach((element, index) => {
          setTimeout(() => {
            ctx.fillStyle = "orange";
            ctx.fillRect(
              element.x * cellSize,
              element.y * cellSize,
              cellSize,
              cellSize
            );
          }, index * 50); // 每個格子的繪製時間間隔為 200ms
        });
      }

      generateMaze(); // 預設先產生一個迷宮
    </script>
  </body>
</html>