Roulette/index.html at main · Chen-538/Roulette · GitHub

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<!DOCTYPE html>
<html lang="zh-Hant">
<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <title>六選項幸運轉盤</title>
  <style>
    :root { --bg:#f7fafc; --ink:#0f172a; --muted:#64748b; }
    html,body{height:100%} body{margin:0;background:linear-gradient(#fff,#f4f6f9);}
    .wrap{min-height:100%;display:grid;place-items:center;padding:24px}
    .app{max-width:1100px;width:100%;display:grid;grid-template-columns:1fr;gap:24px}
    @media (min-width:900px){ .app{grid-template-columns:1fr 1fr} }

    .card{background:#fff;border:1px solid #e5e7eb;border-radius:18px;box-shadow:0 8px 24px rgba(0,0,0,.06);padding:20px}
    .title{font-size:22px;font-weight:800;letter-spacing:.3px;margin:0 0 8px}
    .muted{color:var(--muted);font-size:14px;margin:0 0 14px}
    .row{display:flex;align-items:center;gap:10px;margin-bottom:10px}
    .tag{font:600 12px/1 system-ui;padding:6px 10px;background:#f1f5f9;border-radius:999px;min-width:34px;text-align:center}
    .input{flex:1;border:1px solid #e5e7eb;border-radius:12px;padding:10px 12px;font-size:14px}
    .btns{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
    .btn{border:1px solid #e5e7eb;background:#fff;border-radius:14px;padding:10px 14px;font-weight:600;cursor:pointer}
    .btn.primary{background:#0369d9;border-color:#0369d9;color:#fff}
    .btn:disabled{opacity:.6;cursor:not-allowed}
    .pin{position:absolute;top:-6px;z-index:20;display:flex;flex-direction:column;align-items:center}
    .pin-tip{width:0;height:0;border-left:14px solid transparent;border-right:14px solid transparent;border-bottom:22px solid #111827;filter:drop-shadow(0 2px 2px rgba(0,0,0,.2))}
    .pin-stem{width:4px;height:24px;background:#111827;border-bottom-left-radius:4px;border-bottom-right-radius:4px}
    .wheel{position:relative;width:min(88vw,520px);height:min(88vw,520px);border-radius:50%;border:10px solid #fff;box-shadow:0 10px 30px rgba(0,0,0,.12);overflow:hidden;background:#fff}
    .center-dot{fill:#fff;stroke:#e2e8f0;stroke-width:1.2}
  </style>
</head>
<body>
  <div class="wrap">
    <div class="app">
      <!-- 控制區 -->
      <div class="card">
        <h1 class="title">六選項幸運轉盤</h1>
        <p class="muted">輸入六個選項，按「開始旋轉」，讓命運替你決定！</p>
        <div id="inputs"></div>
        <div class="btns">
          <button id="btnSpin" class="btn primary">開始旋轉</button>
          <button id="btnReset" class="btn">重置角度</button>
          <button id="btnDemo" class="btn">一鍵填入範例</button>
        </div>
        <!-- 已移除結果顯示區 -->
      </div>

      <!-- 轉盤區 -->
      <div class="card" style="display:flex;align-items:center;justify-content:center">
        <div style="position:relative;display:grid;place-items:center;">
          <div class="pin">
            <div class="pin-tip"></div>
            <div class="pin-stem"></div>
          </div>

          <div id="wheel" class="wheel" aria-label="抽獎轉盤">
            <svg id="svg" viewBox="0 0 100 100" width="100%" height="100%"></svg>
          </div>
        </div>
      </div>
    </div>
  </div>

<script>
(function () {
  const COLORS = ["#fde68a","#86efac","#93c5fd","#fca5a5","#c4b5fd","#f9a8d4"];
  const N = 6, SLICE = 360 / N;
  const state = {
    labels: ["選項 1","選項 2","選項 3","選項 4","選項 5","選項 6"],
    rotation: 0,
    spinning: false,
    resultIdx: null
  };

  const inputs = document.getElementById("inputs");
  const btnSpin = document.getElementById("btnSpin");
  const btnReset = document.getElementById("btnReset");
  const btnDemo = document.getElementById("btnDemo");
  const wheel = document.getElementById("wheel");
  const svg = document.getElementById("svg");

  // --- UI: 六個輸入框 ---
  function renderInputs() {
    inputs.innerHTML = "";
    for (let i = 0; i < N; i++) {
      const row = document.createElement("div"); row.className = "row";
      const tag = document.createElement("span"); tag.className="tag"; tag.textContent = String(i+1);
      const input = document.createElement("input");
      input.className="input"; input.maxLength = 24; input.value = state.labels[i];
      input.placeholder = `選項 ${i+1}`;
      input.addEventListener("input", e => {
        state.labels[i] = e.target.value;
        drawWheel(); // 即時更新輪上的文字
      });
      row.appendChild(tag); row.appendChild(input);
      inputs.appendChild(row);
    }
  }

  // --- 幾何工具 ---
  const toRad = deg => (deg * Math.PI) / 180;
  function polar(cx, cy, r, angle) {
    const a = toRad(angle - 90); // 12 點鐘方向為 0°
    return { x: cx + r * Math.cos(a), y: cy + r * Math.sin(a) };
  }
  function wedgePath(cx, cy, r, a0, a1) {
    const s = polar(cx, cy, r, a1);
    const e = polar(cx, cy, r, a0);
    const large = (a1 - a0) <= 180 ? 0 : 1;
    return `M ${cx} ${cy} L ${s.x} ${s.y} A ${r} ${r} 0 ${large} 0 ${e.x} ${e.y} Z`;
  }

  // --- 畫輪盤 ---
  function drawWheel() {
    svg.innerHTML = "";
    const slices = Array.from({length: N}, (_, i) => {
      const start = i * SLICE, end = start + SLICE, center = start + SLICE/2;
      return { i, start, end, center, color: COLORS[i % COLORS.length], label: state.labels[i] || `選項 ${i+1}` };
    });

    // 扇形
    for (const s of slices) {
      const path = document.createElementNS("http://www.w3.org/2000/svg","path");
      path.setAttribute("d", wedgePath(50,50,48, s.start, s.end));
      path.setAttribute("fill", s.color);
      path.setAttribute("stroke", "#fff");
      path.setAttribute("stroke-width", "0.6");
      svg.appendChild(path);
    }
    // 文字
    for (const s of slices) {
      const pos = polar(50,50,33, s.center);
      const g = document.createElementNS("http://www.w3.org/2000/svg","g");
      const t = document.createElementNS("http://www.w3.org/2000/svg","text");
      t.setAttribute("x", pos.x); t.setAttribute("y", pos.y);
      t.setAttribute("font-size","4"); t.setAttribute("text-anchor","middle");
      t.setAttribute("dominant-baseline","middle"); t.setAttribute("fill","#0f172a");
      t.setAttribute("transform", `rotate(${s.center} ${pos.x} ${pos.y})`);
      t.textContent = s.label;
      g.appendChild(t); svg.appendChild(g);
    }
    // 中心
    const dot = document.createElementNS("http://www.w3.org/2000/svg","circle");
    dot.setAttribute("cx","50"); dot.setAttribute("cy","50"); dot.setAttribute("r","10");
    dot.setAttribute("class","center-dot");
    svg.appendChild(dot);
    const txt = document.createElementNS("http://www.w3.org/2000/svg","text");
    txt.setAttribute("x","50"); txt.setAttribute("y","50");
    txt.setAttribute("font-size","4"); txt.setAttribute("text-anchor","middle");
    txt.setAttribute("dominant-baseline","middle"); txt.setAttribute("fill","#334155");
    txt.textContent = "Spin"; svg.appendChild(txt);
  }

  // --- 旋轉 ---
  function spin() {
    if (state.spinning) return;
    state.spinning = true; btnSpin.disabled = true; btnReset.disabled = true; btnDemo.disabled = true;

    const targetIdx = Math.floor(Math.random() * N);
    const targetCenter = (targetIdx * SLICE) + SLICE/2; // 0..360
    const extraSpins = 5 + Math.floor(Math.random()*4); // 5~8 圈

    const current = ((state.rotation % 360) + 360) % 360;
    let delta = targetCenter - current;
    if (delta < 0) delta += 360;

    const finalRotation = state.rotation + extraSpins*360 + delta;
    wheel.style.transition = `transform 4500ms cubic-bezier(0.12, 0.11, 0.08, 1)`;
    requestAnimationFrame(() => wheel.style.transform = `rotate(${finalRotation}deg)`);

    setTimeout(() => {
      state.rotation = finalRotation;
      state.spinning = false;
      state.resultIdx = targetIdx; // 仍保留資料，但不顯示
      wheel.style.transition = "";
      btnSpin.disabled = false; btnReset.disabled = false; btnDemo.disabled = false;
    }, 4550);
  }

  function resetWheel() {
    if (state.spinning) return;
    state.rotation = 0;
    wheel.style.transition = "transform 250ms ease";
    wheel.style.transform = "rotate(0deg)";
    setTimeout(() => (wheel.style.transition = ""), 260);
  }

  function fillDemo() {
    if (state.spinning) return;
    state.labels = ["炸雞","披薩","壽司","拉麵","火鍋","便當"];
    renderInputs(); drawWheel();
  }

  // 綁定
  btnSpin.addEventListener("click", spin);
  btnReset.addEventListener("click", resetWheel);
  btnDemo.addEventListener("click", fillDemo);

  // 初始畫面
  renderInputs(); drawWheel();
})();
</script>
</body>
</html>