178 lines
11 KiB
JavaScript
178 lines
11 KiB
JavaScript
/* ================= 首页头图：宝宝时不时动一动小手小脚（2026-10-05） =================
|
||
用户：「右上角羊水袋里的小宝宝时不时稍微动一动小腿、小脚、小胳膊，缓缓地动，不要太激烈」。
|
||
|
||
⚠️ 之前试过 AI 生成的 GIF，整张一起扭，脸型、腿型都变（见 hero-fx.js show() 里的注释），所以这里不用动图：
|
||
在静图上盖一张 WebGL 画布，同一张 PNG 原样画上去，只在「关节 → 手脚末端」这一小段做小角度旋转扭动，
|
||
脸周围是保护圈（权重强制为 0），头和身子一像素都不动。
|
||
· 每个阶段的关节位置手工标在 LIMBS 里（坐标 = 480×480 原图像素）。1、2 阶段是胚芽，没有手脚，不动。
|
||
· 节奏（10-12 起只在孕 20 周起）：每隔 4～9 秒随机挑一处（小腿 / 小脚 / 小胳膊），用 1.8～2.8 秒缓缓抬起再放回；
|
||
偶尔小腿和小脚一起「蹬」一下。角度只有 3～9 度。不动的时候不重画（不占电）。
|
||
· 跟 hero-fx.js 解耦：不改它，只盯 #heroStill 的 src / class —— 换阶段、淡入淡出都自动跟上。
|
||
· 没 WebGL / 系统「减少动态效果」→ 什么都不做，静图照常。
|
||
· 调试：URL 带 limbdebug=1 → 角度 ×4、动作更频繁，并把会动的区域染成蓝色，方便核对关节标得准不准。 */
|
||
(function () {
|
||
'use strict';
|
||
const still = document.getElementById('heroStill');
|
||
const box = document.getElementById('heroBaby');
|
||
if (!still || !box || matchMedia('(prefers-reduced-motion: reduce)').matches) return;
|
||
const DEBUG = /[?&]limbdebug=1/.test(location.search);
|
||
|
||
// 每处：[关节 x, y, 末端 x, y, 影响半径, 最大角度（度）, 类型] 类型 leg / foot / arm（foot 会被 leg 带着一起蹬）
|
||
// face：[圆心 x, y, 半径] —— 圈内完全不动，1.5 倍半径处才恢复
|
||
const LIMBS = {
|
||
'450581c2f05f': { face: [228, 222, 24], l: [[268, 272, 300, 286, 14, 6, 'leg'], [242, 258, 266, 240, 9, 5, 'arm']] },
|
||
'dc4c7eea1c50': { face: [240, 207, 30], l: [[288, 272, 322, 320, 18, 5, 'leg'], [306, 318, 326, 310, 10, 9, 'foot'], [228, 272, 256, 236, 10, 3, 'arm']] },
|
||
'7bf792b04123': { face: [217, 205, 32], l: [[252, 262, 292, 302, 15, 6, 'leg'], [278, 305, 296, 298, 10, 10, 'foot'], [197, 283, 236, 244, 12, 5, 'arm']] },
|
||
'f140f4367b48': { face: [220, 208, 33], l: [[262, 262, 306, 303, 15, 6, 'leg'], [288, 305, 308, 300, 10, 10, 'foot'], [200, 282, 236, 244, 12, 5, 'arm']] },
|
||
'51e99b3060e2': { face: [222, 205, 34], l: [[276, 266, 335, 310, 17, 6, 'leg'], [322, 313, 338, 305, 11, 10, 'foot'], [232, 268, 278, 240, 12, 5, 'arm']] },
|
||
'a5dbb24c1ef2': { face: [225, 215, 40], l: [[276, 252, 322, 296, 16, 5, 'leg'], [310, 305, 326, 293, 11, 10, 'foot']] },
|
||
'610c4d92c16d': { face: [250, 205, 42], l: [[292, 272, 335, 305, 16, 4, 'leg'], [325, 312, 338, 300, 12, 9, 'foot']] }
|
||
};
|
||
const N = 4; // shader 里最多 4 处
|
||
|
||
const cv = document.createElement('canvas');
|
||
cv.className = 'hero-kid hero-limb';
|
||
cv.setAttribute('aria-hidden', 'true');
|
||
still.after(cv);
|
||
const gl = cv.getContext('webgl', { premultipliedAlpha: true, alpha: true }) || cv.getContext('experimental-webgl');
|
||
if (!gl) { cv.remove(); return; }
|
||
|
||
const VS = 'attribute vec2 a;void main(){gl_Position=vec4(a,0.,1.);}';
|
||
const FS = [
|
||
'precision mediump float;',
|
||
'uniform vec2 uRes;uniform sampler2D uTex;uniform vec4 uL[' + N + '];uniform vec2 uR[' + N + '];uniform vec3 uF;uniform float uDbg;',
|
||
'void main(){',
|
||
' vec2 q=vec2(gl_FragCoord.x/uRes.x,1.-gl_FragCoord.y/uRes.y)*480.;',
|
||
' vec2 off=vec2(0.);float wsum=0.;',
|
||
' for(int i=0;i<' + N + ';i++){',
|
||
' float ang=uR[i].y; if(ang==0.) continue;',
|
||
' vec2 p=uL[i].xy,d=uL[i].zw-p; float s=dot(q-p,d)/dot(d,d);',
|
||
' float dist=length(q-(p+d*clamp(s,0.,1.))); float r=uR[i].x;',
|
||
// 关节处 0 → 段长一半处 1（关节不撕开）；过了末端再渐隐；离开肢体 r 以外渐隐
|
||
' float w=smoothstep(.05,.55,s)*(1.-smoothstep(1.25,1.7,s))*(1.-smoothstep(r*.6,r*1.25,dist));',
|
||
' float a=-ang*w; vec2 v=q-p;',
|
||
' off+=vec2(cos(a)*v.x-sin(a)*v.y,sin(a)*v.x+cos(a)*v.y)-v; wsum+=w;',
|
||
' }',
|
||
' float fw=smoothstep(uF.z,uF.z*1.5,length(q-uF.xy));', // 脸保护圈
|
||
' vec4 c=texture2D(uTex,(q+off*fw)/480.);',
|
||
' if(uDbg>.5) c.rgb=mix(c.rgb,vec3(.2,.5,1.)*c.a,min(wsum*fw,1.)*.6);',
|
||
' gl_FragColor=c;',
|
||
'}'
|
||
].join('\n');
|
||
function sh(t, src) { const s = gl.createShader(t); gl.shaderSource(s, src); gl.compileShader(s); return s; }
|
||
const pr = gl.createProgram();
|
||
gl.attachShader(pr, sh(gl.VERTEX_SHADER, VS)); gl.attachShader(pr, sh(gl.FRAGMENT_SHADER, FS)); gl.linkProgram(pr);
|
||
if (!gl.getProgramParameter(pr, gl.LINK_STATUS)) { cv.remove(); return; }
|
||
gl.useProgram(pr);
|
||
gl.bindBuffer(gl.ARRAY_BUFFER, gl.createBuffer());
|
||
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([-1, -1, 3, -1, -1, 3]), gl.STATIC_DRAW);
|
||
const aLoc = gl.getAttribLocation(pr, 'a');
|
||
gl.enableVertexAttribArray(aLoc); gl.vertexAttribPointer(aLoc, 2, gl.FLOAT, false, 0, 0);
|
||
const U = {}; ['uRes', 'uTex', 'uL', 'uR', 'uF', 'uDbg'].forEach(k => { U[k] = gl.getUniformLocation(pr, k); });
|
||
gl.uniform1i(U.uTex, 0); gl.uniform1f(U.uDbg, DEBUG && !/limbdebug=2/.test(location.search) ? 1 : 0); // limbdebug=2：放大角度但不染色
|
||
const tex = gl.createTexture();
|
||
gl.bindTexture(gl.TEXTURE_2D, tex);
|
||
gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, true);
|
||
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
|
||
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
|
||
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
|
||
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
|
||
|
||
/* 2026-10-12 用户：「20 周以后的宝宝，偶尔让他稍微动一动，微微动一动脚和手，幅度不要太大」。
|
||
原来 11 周起都动、角度 3～9°，实测 10 秒里只有两三百个像素在变，基本看不出来。
|
||
改成：只有孕 20 周起才动；手 3°→5°、小腿 5°→6°、小脚 9°→10°（仍是「微微」），间隔放宽到 4～9 秒（「偶尔」）。
|
||
孕周来自 hero-fx.js 同一个 mb-preg 事件（没建档 / 产后不动）；kidweek=NN 调试参数照样认。 */
|
||
const FORCE = (location.search.match(/[?&]kidweek=(\d+)/) || [])[1];
|
||
let week = FORCE != null ? +FORCE : (window.__mbPreg && !window.__mbPreg.postpartum ? window.__mbPreg.week : null);
|
||
addEventListener('mb-preg', e => { if (FORCE == null) { const d = e.detail || {}; week = d.postpartum ? null : d.week; } });
|
||
const old = () => week >= 20;
|
||
let cfg = null, ready = false, raf = 0, timer = 0, seen = true, lastPick = -1;
|
||
const moves = []; // 正在进行的动作：{ i, t0, dur, amp }
|
||
const home = document.getElementById('screen-home');
|
||
const active = () => seen && !document.hidden && (!home || home.classList.contains('is-active'));
|
||
|
||
function size() {
|
||
const d = Math.min(3, devicePixelRatio || 1), w = Math.round(Math.min(720, box.clientWidth * d)) || 480;
|
||
if (cv.width !== w) { cv.width = cv.height = w; gl.viewport(0, 0, w, w); }
|
||
gl.uniform2f(U.uRes, w, w);
|
||
}
|
||
function draw(now) {
|
||
const L = new Float32Array(N * 4), R = new Float32Array(N * 2);
|
||
let busy = false;
|
||
for (let k = moves.length - 1; k >= 0; k--) {
|
||
const m = moves[k], u = (now - m.t0) / m.dur;
|
||
if (u >= 1) { moves.splice(k, 1); continue; }
|
||
if (u < 0) { busy = true; continue; }
|
||
busy = true;
|
||
const e = Math.sin(Math.PI * u); R[m.i * 2 + 1] += m.amp * e * e; // 缓起缓落：0 → 最大 → 0
|
||
}
|
||
cfg.l.forEach((l, i) => { if (i < N) { L.set(l.slice(0, 4), i * 4); R[i * 2] = l[4]; } });
|
||
gl.uniform4fv(U.uL, L); gl.uniform2fv(U.uR, R); gl.uniform3fv(U.uF, cfg.face);
|
||
gl.clearColor(0, 0, 0, 0); gl.clear(gl.COLOR_BUFFER_BIT);
|
||
gl.drawArrays(gl.TRIANGLES, 0, 3);
|
||
return busy;
|
||
}
|
||
function loop(now) {
|
||
raf = 0;
|
||
if (!ready || !active()) return;
|
||
if (draw(now)) raf = requestAnimationFrame(loop);
|
||
}
|
||
const kick = () => { if (!raf && ready) raf = requestAnimationFrame(loop); };
|
||
|
||
// 安排下一次「动一动」
|
||
function plan() {
|
||
clearTimeout(timer);
|
||
timer = setTimeout(() => {
|
||
if (ready && active() && cfg.l.length && (old() || DEBUG)) {
|
||
let i = Math.floor(Math.random() * cfg.l.length);
|
||
if (i === lastPick && cfg.l.length > 1) i = (i + 1) % cfg.l.length;
|
||
lastPick = i;
|
||
const now = performance.now(), l = cfg.l[i], dir = Math.random() < .5 ? -1 : 1;
|
||
const dur = 1800 + Math.random() * 1000, deg = l[5] * (.6 + Math.random() * .4) * (DEBUG ? 4 : 1);
|
||
moves.push({ i, t0: now, dur, amp: dir * deg * Math.PI / 180 });
|
||
// 小腿动时 4 成概率小脚也跟着轻轻翘一下（像蹬了一下），稍晚 0.3 秒起
|
||
const f = cfg.l.findIndex(x => x[6] === 'foot');
|
||
if (l[6] === 'leg' && f >= 0 && Math.random() < .4)
|
||
moves.push({ i: f, t0: now + 300, dur: dur - 200, amp: -dir * cfg.l[f][5] * .7 * (DEBUG ? 4 : 1) * Math.PI / 180 });
|
||
kick();
|
||
}
|
||
plan();
|
||
}, DEBUG ? 900 + Math.random() * 600 : 4000 + Math.random() * 5000);
|
||
}
|
||
|
||
// 跟着 #heroStill：换图时重新载贴图，静图淡出时画布一起淡出
|
||
function sync() {
|
||
const m = (still.getAttribute('src') || '').match(/([0-9a-f]{12})\.png/);
|
||
const next = m && LIMBS[m[1]];
|
||
if (!next) { cfg = null; ready = false; cv.classList.remove('is-on'); return; }
|
||
if (next !== cfg) {
|
||
cfg = next; ready = false; moves.length = 0;
|
||
cv.classList.remove('is-on');
|
||
const img = new Image();
|
||
img.onload = () => {
|
||
if (cfg !== next) return;
|
||
size();
|
||
gl.bindTexture(gl.TEXTURE_2D, tex);
|
||
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, img);
|
||
ready = true; draw(performance.now());
|
||
if (still.classList.contains('is-on')) cv.classList.add('is-on');
|
||
};
|
||
img.src = still.src;
|
||
return;
|
||
}
|
||
if (ready) cv.classList.toggle('is-on', still.classList.contains('is-on'));
|
||
}
|
||
// 调试：__limbPose(k) 把所有手脚定格在 k × 最大角度（k=0 原图），方便截图核对
|
||
if (DEBUG) window.__limbPose = k => {
|
||
clearTimeout(timer); moves.length = 0;
|
||
cfg.l.forEach((l, i) => moves.push({ i, t0: performance.now() - 500, dur: 1000, amp: k * l[5] * Math.PI / 180 }));
|
||
draw(performance.now()); moves.length = 0;
|
||
};
|
||
new MutationObserver(sync).observe(still, { attributes: true, attributeFilter: ['src', 'class'] });
|
||
sync();
|
||
plan();
|
||
addEventListener('resize', () => { if (ready) { size(); draw(performance.now()); } });
|
||
if ('IntersectionObserver' in window) new IntersectionObserver(es => { seen = es[0].isIntersecting; }).observe(box);
|
||
cv.addEventListener('webglcontextlost', () => { ready = false; cv.classList.remove('is-on'); });
|
||
})();
|