Karlcarlo
0ddd6348fb
- 9 个阶段静图 + GIF 重做：抠出宝宝缩小后贴回空孕囊，孕囊外形/大小不动 - GIF 每帧底图用静图，羊水不晃，只有宝宝自己在动；帧差透明压缩，1~3MB → 250~490KB - hero-fx.js 不再画水波层（光束、微粒保留） Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
188 lines
11 KiB
JavaScript
188 lines
11 KiB
JavaScript
/* ================= 首页头图：按孕周换宝宝 + 阳光水波（2026-10-04） =================
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用户：「宝宝按孕周换、孕囊跟着宝宝大小变；顶部往下落的花瓣去掉，换成阳光和水波纹」。
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① 换宝宝：孕周来自 app.js 的 mb-preg 事件（syncPregnancy 跑完广播，首屏一次、远程档案回来再一次）。
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9 个阶段各一张「羊水囊 + 宝宝」整幅图：静图（首帧）先出，GIF 加载完再盖上淡入。
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没建档 / 产后 / 事件迟迟不来 → 用第 6 阶段（原来那个 25 周的宝宝）。
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孕囊大小 = .hero-baby 的 --k（相对原 25 周囊的倍数），CSS 里围绕同一圆心缩放、带过渡。
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调试：URL 带 kidweek=12 强制按 12 周显示。
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② 阳光水波：#heroFx 一张画布，screen 混合叠在宝宝上、文字下。
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柔光束 + 柔和水波光影 + 悬浮微粒，宝宝区域避开（详见下面那段）。
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不在首页 / 页面隐藏 / 头图滚出视口时停画；系统「减少动态效果」下整块不画（CSS 也隐藏）。 */
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(function () {
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'use strict';
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// [起始孕周, 静图, GIF, 孕囊倍数 k]
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const STAGES = [
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[0, 'd86caa477171.jpg', '482d0a3043b9.gif', .42], // 1 4–7 周 胚芽 + 卵黄囊
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[8, '677339874dd7.jpg', '30163971ab67.gif', .52], // 2 8–10 周 小豆芽胚胎
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[11, 'eed131630ed3.jpg', 'a59fd5aa0f28.gif', .62], // 3 11–13 周 刚有人形
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[14, 'fdcdef9ad731.jpg', 'b6fdd2c43538.gif', .72], // 4 14–17 周 身子拉长、吮手
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[18, '18022a7d97d3.jpg', 'ece5fb854939.gif', .86], // 5 18–23 周 比例接近新生儿、偏瘦
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[24, '87dac10fb33c.jpg', '55c1e3d20b6d.gif', 1], // 6 24–27 周 原来那个宝宝
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[28, 'd8eb9eb12eee.jpg', 'a0e633273ab4.gif', 1.01], // 7 28–31 周 大一圈、有胎发
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[32, '99cf27ee651e.jpg', '9d1908a2aff3.gif', 1.02], // 8 32–35 周 肉嘟嘟、抱腿
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[36, '6bd1f87ff5ab.jpg', 'c878649c8fee.gif', 1.03] // 9 36 周起 足月、撑满羊水囊（头朝上：10-04 用户说头朝下看着不舒服）
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];
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const DEFAULT = 5;
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const IMG = 'assets/img/';
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const box = document.getElementById('heroBaby');
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const still = document.getElementById('heroStill');
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const kid = document.getElementById('heroKid');
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if (!box || !still || !kid) return;
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const reduce = matchMedia('(prefers-reduced-motion: reduce)').matches;
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const force = (location.search.match(/[?&]kidweek=(\d+)/) || [])[1];
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function stageOf(week) {
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if (week == null || isNaN(week)) return DEFAULT;
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let i = 0;
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while (i + 1 < STAGES.length && week >= STAGES[i + 1][0]) i++;
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return i;
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}
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let cur = -1, seq = 0;
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function show(i) {
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if (i === cur) return;
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cur = i;
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const [, png, gif, k] = STAGES[i], my = ++seq;
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box.style.setProperty('--k', k);
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// 先把旧图淡掉再换，避免新旧宝宝叠在一起闪一下
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kid.classList.remove('is-on'); still.classList.remove('is-on');
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const s = new Image();
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s.onload = () => { if (my !== seq) return; still.src = s.src; still.classList.add('is-on'); };
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s.src = IMG + png;
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if (reduce) return;
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const g = new Image();
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g.onload = () => { if (my !== seq) return; kid.src = g.src; kid.classList.add('is-on'); };
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g.src = IMG + gif;
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}
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function onPreg(d) { show(stageOf(force != null ? +force : (d && d.week))); }
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addEventListener('mb-preg', e => onPreg(e.detail));
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if (force != null || window.__mbPreg) onPreg(window.__mbPreg);
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else setTimeout(() => { if (cur < 0) show(DEFAULT); }, 2500);
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/* ---------------- 阳光 + 水波 ----------------
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2026-10-04 三版（用户：「光束太硬，要柔柔地射进来；水波纹可以有，但宝宝的脸不能变；不要白色网状水波纹」）：
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· 光束：画在 1/6 分辨率的小画布上再放大，边缘天然糊开 → 柔光；宽、淡、慢慢摆、忽明忽暗
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· 水波：极低分辨率算几层正弦叠出的大片明暗，放大后是柔和的、缓缓流动的光影（不是网）
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· 宝宝区域（孕囊中心 70% 半径内）水波压到很淡、光束减半；不再给孕囊挂任何形变滤镜，宝宝的脸一像素都不动
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· 悬浮微粒：羊水里的小颗粒，慢慢漂、闪一下 */
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const cv = document.getElementById('heroFx');
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if (!cv || reduce) return;
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const hero = cv.parentNode, home = document.getElementById('screen-home');
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const ctx = cv.getContext('2d');
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const RS = 6; // 光束小画布缩小倍数
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const rc = document.createElement('canvas'), rx = rc.getContext('2d');
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const CW = 32; // 水波低分辨率宽（越低越柔）
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const off = document.createElement('canvas'), oc = off.getContext('2d');
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let tick = 0, W = 0, H = 0, dpr = 1, ch = 0, img = null, seen = true, raf = 0, last = 0, prev = 0;
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let SX = 0, SY = 0, SR = 1; // 孕囊圆心/半径（CSS px）
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function size() {
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const r = hero.getBoundingClientRect(), b = box.getBoundingClientRect();
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dpr = Math.min(devicePixelRatio || 1, 2);
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W = r.width; H = r.height;
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cv.width = Math.round(W * dpr); cv.height = Math.round(H * dpr);
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rc.width = Math.max(8, Math.round(W / RS)); rc.height = Math.max(8, Math.round(H / RS));
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ch = Math.max(8, Math.round(CW * H / W));
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off.width = CW; off.height = ch; img = oc.createImageData(CW, ch);
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SX = b.left - r.left + b.width / 2; SY = b.top - r.top + b.height / 2; SR = Math.max(b.width, 60) / 2;
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}
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// 宝宝保护：孕囊中心附近 → 0，囊边 → 1
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function guard(x, y) {
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const d = Math.hypot(x - SX, y - SY) / SR;
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return d < .45 ? 0 : d > .95 ? 1 : (d - .45) / .5;
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}
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// 水波：四层不同方向、不同速度的长波叠加，取正半部分 → 一片片柔和的亮斑缓缓流过
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function water(t) {
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const d = img.data, T = t * .45;
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for (let y = 0; y < ch; y++) {
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for (let x = 0; x < CW; x++) {
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const u = x / CW * 6, v = y / CW * 6;
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let w = Math.sin(u * 1.1 + T) + Math.sin(v * 1.3 - T * .8 + u * .4) + Math.sin((u - v) * .9 + T * .6) + Math.sin(Math.hypot(u - 4.5, v - 1) * 1.6 - T * 1.1);
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w = w / 4; w = w > 0 ? w * w : 0; // 只留亮的那半，平方让过渡更软
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const X = x / CW * W, Y = y / ch * H;
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const g = .15 + .85 * guard(X, Y);
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const o = (y * CW + x) * 4;
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d[o] = 255; d[o + 1] = 238; d[o + 2] = 214; d[o + 3] = w * 200 * g * (1 - y / ch * .35);
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}
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}
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oc.putImageData(img, 0, 0);
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}
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function drawWater() {
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ctx.globalCompositeOperation = 'lighter';
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ctx.imageSmoothingEnabled = true; ctx.imageSmoothingQuality = 'high';
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ctx.globalAlpha = .55;
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ctx.drawImage(off, 0, 0, W, H);
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ctx.globalAlpha = 1;
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}
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// 柔光束：光源在头图上方偏右画外；每道是一条很宽的渐变扇形，画在小画布上再放大
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const RAYS = [[-.12, .07, .8], [0, .05, .7], [.11, .08, 1], [.23, .06, .7]];
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function rays(t) {
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const w = rc.width, h = rc.height, ox = w * .8, oy = -h * .9, L = h * 2.8;
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rx.setTransform(1, 0, 0, 1, 0, 0);
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rx.clearRect(0, 0, w, h);
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rx.globalCompositeOperation = 'lighter';
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RAYS.forEach(([a0, ww, al], i) => {
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const a = Math.PI * .6 + a0 + Math.sin(t * .09 + i * 1.9) * .03;
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const k = al * (.6 + .4 * Math.sin(t * .23 + i * 2.1));
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const wv = ww * (1 + .2 * Math.sin(t * .17 + i));
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const gr = rx.createLinearGradient(ox, oy, ox + Math.cos(a) * L * .8, oy + Math.sin(a) * L * .8);
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gr.addColorStop(0, 'rgba(255,248,228,0)');
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gr.addColorStop(.35, 'rgba(255,246,224,' + (.34 * k).toFixed(3) + ')');
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gr.addColorStop(.65, 'rgba(255,240,215,' + (.15 * k).toFixed(3) + ')');
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gr.addColorStop(1, 'rgba(255,235,205,0)');
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rx.fillStyle = gr;
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rx.beginPath(); rx.moveTo(ox, oy);
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rx.lineTo(ox + Math.cos(a - wv) * L, oy + Math.sin(a - wv) * L);
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rx.lineTo(ox + Math.cos(a + wv) * L, oy + Math.sin(a + wv) * L);
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rx.closePath(); rx.fill();
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});
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// 宝宝区域光束减半：在小画布上挖一个软边的「淡区」
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rx.globalCompositeOperation = 'destination-out';
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const sx = SX / RS, sy = SY / RS, sr = SR / RS, g = rx.createRadialGradient(sx, sy, 0, sx, sy, sr * .9);
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g.addColorStop(0, 'rgba(0,0,0,.5)'); g.addColorStop(.6, 'rgba(0,0,0,.35)'); g.addColorStop(1, 'rgba(0,0,0,0)');
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rx.fillStyle = g; rx.beginPath(); rx.arc(sx, sy, sr, 0, 6.2832); rx.fill();
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ctx.globalCompositeOperation = 'lighter';
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ctx.imageSmoothingEnabled = true; ctx.imageSmoothingQuality = 'high';
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ctx.drawImage(rc, 0, 0, W, H);
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}
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// 悬浮微粒：慢慢往上漂、左右游，忽明忽暗；孕囊中心附近不画，免得落在宝宝脸上
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const DOTS = Array.from({ length: 26 }, () => ({ x: Math.random(), y: Math.random(), r: .5 + Math.random() * 1.2,
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vx: (Math.random() - .5) * .006, vy: -(.004 + Math.random() * .008), ph: Math.random() * 6.3, sp: .6 + Math.random() * 1.4 }));
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function dots(t, dt) {
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ctx.globalCompositeOperation = 'lighter';
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for (const p of DOTS) {
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p.x += (p.vx + Math.sin(t * .5 + p.ph) * .002) * dt; p.y += p.vy * dt;
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if (p.y < -.03) { p.y = 1.03; p.x = Math.random(); }
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if (p.x < -.03) p.x = 1.03; else if (p.x > 1.03) p.x = -.03;
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const X = p.x * W, Y = p.y * H, gd = guard(X, Y);
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if (gd <= 0) continue;
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const al = (.15 + .25 * (.5 + .5 * Math.sin(t * p.sp + p.ph))) * gd;
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const R = p.r * 2.4, g = ctx.createRadialGradient(X, Y, 0, X, Y, R);
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g.addColorStop(0, 'rgba(255,250,238,' + al.toFixed(3) + ')');
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g.addColorStop(1, 'rgba(255,250,238,0)');
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ctx.fillStyle = g; ctx.beginPath(); ctx.arc(X, Y, R, 0, 6.2832); ctx.fill();
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}
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}
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function frame(now) {
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raf = 0;
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if (!(seen && !document.hidden && (!home || home.classList.contains('is-active')))) { prev = 0; return; }
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raf = requestAnimationFrame(frame);
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if (now - last < 33) return; // ≈30fps 足够，省电
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const dt = prev ? Math.min((now - prev) / 1000, .1) : 0; prev = now; last = now;
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const t = now / 1000;
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ctx.setTransform(dpr, 0, 0, dpr, 0, 0);
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ctx.clearRect(0, 0, W, H);
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// 2026-10-04 用户：「水波纹那一层先去掉，动的是宝宝自己（腿脚、嘴角），不是水」→ 不再画水波
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rays(t);
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dots(t, dt);
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}
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function kick() { if (!raf) raf = requestAnimationFrame(frame); }
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size();
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addEventListener('resize', () => { size(); kick(); });
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box.addEventListener('transitionend', size); // 换阶段后孕囊尺寸变了，保护区跟着挪
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document.addEventListener('visibilitychange', kick);
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if (home) new MutationObserver(kick).observe(home, { attributes: true, attributeFilter: ['class'] });
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if ('IntersectionObserver' in window) new IntersectionObserver(es => { seen = es[0].isIntersecting; kick(); }).observe(hero);
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cv.classList.add('is-on');
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kick();
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})();
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