The opening screen of a product page for one pair of headphones. They stand on their cushions on a round paper card, in front of a paper sweep, lit by a window off to the left, and everything you see is one fragment shader: the arched band with its padded leather strip, the metal forks that hold each cup, the domed shells in soft-touch plastic and the cushions with their grain and sheen. Under the name sits a row of five colour chips. Pick one and the pair makes a full turn while the new colour sweeps across from one cup over the band to the other, the cushions change with it and the paper behind follows a beat later, so the whole photograph is re-dressed rather than a picture swapped. Drag anywhere to turn them by hand; they coast and settle. The price is set large beside one dark button, and pressing it makes the pair hop off the card. On phones the headphones sit at the top and the words, chips and button stack below.
import { useEffect, useRef, useState } from "react";
// Everything a visitor would edit first.
const product = {
maker: "Ondelle Sound",
kind: "Over-ear, wireless",
name: ["Lull", "One"],
price: "$249",
cta: "Add to bag",
note: "Example price. Folding yokes, carry pouch included.",
};
// The colourways. Each dresses the shell, the cushions and the paper behind them. Plain sRGB hex; the shader converts them.
const colourways = [
{ name: "Clay", shell: "#d0603f", leather: "#efe2cc", paper: "#eaa47c" },
{ name: "Sage", shell: "#8aa585", leather: "#3a3a2c", paper: "#c4d4a0" },
{ name: "Sky", shell: "#86acd6", leather: "#f2e9d8", paper: "#a8c6e6" },
{ name: "Butter", shell: "#efcb5f", leather: "#6a472b", paper: "#f0cd66" },
{ name: "Ink", shell: "#2b2e36", leather: "#1c1c1f", paper: "#bcb5a8" },
];
const HERO = 0.62; // resting turn in radians: three quarters, the left cushion toward the lens
const SWAP = 1.6; // seconds a new colour takes to sweep across the shell
const INK = "#1a1612";
const FONT = '"Inter Tight", "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif';
const SERIF = '"Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif';
const lin = (hex: string) => [1, 3, 5].map((i) => Math.pow(parseInt(hex.slice(i, i + 2), 16) / 255, 2.2));
// Where the camera stands for a frame of this size.
function frameOf(w: number, h: number) {
const desk = w >= 1024, wide = w >= 768, aspect = w / h;
const dist = 9, el = desk ? 0.24 : 0.27;
const foc = desk ? Math.min(2.55, 1.5 * aspect) : wide ? Math.min(2.3, 1.45 * aspect) : Math.min(2.0, (dist * aspect) / 3.35);
const tgt = [0, 1.08, 0];
const cam = [0, tgt[1] + dist * Math.sin(el), -dist * Math.cos(el)];
const fx = desk ? 0.665 : wide ? 0.64 : 0.5, fy = desk ? 0.46 : wide ? 0.44 : 0.255;
const shift = [(fx - 0.5) * aspect, 0.5 - fy];
const fw = [0, -Math.sin(el), Math.cos(el)], up = [0, Math.cos(el), Math.sin(el)];
const project = (x: number, y: number, z: number) => {
const v = [x - cam[0], y - cam[1], z - cam[2]];
const d = v[1] * fw[1] + v[2] * fw[2];
return { x: w / 2 + ((v[0] / d) * foc + shift[0]) * h, y: h / 2 - (((v[1] * up[1] + v[2] * up[2]) / d) * foc + shift[1]) * h, k: (foc / d) * h };
};
return { dist, el, foc, tgt, cam, shift, project };
}
const VERT = `ATTR vec2 aPos; void main(){ gl_Position = vec4(aPos, 0.0, 1.0); }`;
const TONE = `
vec3 tone(vec3 x){ vec3 c = 1.0 - exp(-max(x, 0.0) * 1.0); c = mix(c, c * c * (3.0 - 2.0 * c), 0.45); return pow(c, vec3(1.0 / 2.2)); }
`;
// The photograph: a paper sweep in daylight, a round card, and a pair of headphones standing on their cushions.
const SCENE = `
precision highp float;
uniform vec2 uRes; uniform vec4 uJit; uniform float uSeed; uniform float uDirect;
uniform vec3 uCam; uniform vec3 uTgt; uniform float uFoc; uniform vec2 uShift; uniform float uFocus;
uniform float uRot; uniform float uLift; uniform vec3 uSun;
uniform vec3 uOldS; uniform vec3 uNewS; uniform vec3 uOldL; uniform vec3 uNewL; uniform float uProg;
uniform vec3 uPaper; uniform vec3 uCard;
vec3 gRnd;
const float ZW = 3.6; const float RC = 1.3; const float TOP = 9.0; const float TOPR = 1.6;
const float PH = 0.1; const float PR = 1.48;
const float CX = 0.9; const float CY = 0.52; const float BC = 1.24; const float RB = 0.93; const float YTOP = 2.26;
const vec3 SUNC = vec3(1.0, 0.96, 0.9); const float SUNI = 2.6;
${TONE}
float h21(vec2 p){ vec3 q = fract(vec3(p.xyx) * 0.1031); q += dot(q, q.yzx + 33.33); return fract((q.x + q.y) * q.z); }
float n2(vec2 x){ vec2 i = floor(x); vec2 f = fract(x); f = f * f * (3.0 - 2.0 * f);
return mix(mix(h21(i), h21(i + vec2(1.0, 0.0)), f.x), mix(h21(i + vec2(0.0, 1.0)), h21(i + vec2(1.0, 1.0)), f.x), f.y); }
float smin(float a, float b, float k){ float h = clamp(0.5 + 0.5 * (b - a) / k, 0.0, 1.0); return mix(b, a, h) - k * h * (1.0 - h); }
float smax(float a, float b, float k){ return -smin(-a, -b, k); }
float rbox2(vec2 w, float r){ return min(max(w.x, w.y), 0.0) + length(max(w, 0.0)) - r; }
vec3 toLocalDir(vec3 v){ float s = sin(uRot); float c = cos(uRot); return vec3(c * v.x + s * v.z, v.y, -s * v.x + c * v.z); }
vec3 toWorldDir(vec3 v){ float s = sin(uRot); float c = cos(uRot); return vec3(c * v.x - s * v.z, v.y, s * v.x + c * v.z); }
vec3 toLocal(vec3 p){ return toLocalDir(vec3(p.x, p.y - uLift - PH, p.z)); }
// The parts, each in the headphones' own frame. a is the point folded onto the right-hand side.
float ovalR(vec3 p){ return length(vec2(p.y * 0.94, p.z * 1.1)); }
float dShell(vec3 a){ vec3 p = a - vec3(CX + 0.04, CY, 0.0); float r = ovalR(p);
// a soft dome on the outer face, flat where the cushion sits
float dome = 0.05 * (1.0 - smoothstep(0.0, 0.42, r));
float d = rbox2(vec2(r - 0.38, abs(p.x - 0.5 * dome) - 0.1 - 0.5 * dome), 0.075);
// a fine parting groove round the outer face, where the cap meets the cup
float g = length(vec2(r - 0.33, p.x - 0.19 - 0.5 * dome)) - 0.012;
return smax(d, -g, 0.006); }
float dCush(vec3 a){ vec3 p = a - vec3(CX - 0.15, CY, 0.0); float r = ovalR(p);
return (length(vec2(r - 0.285, p.x * 1.25)) - 0.125) * 0.8; }
float dFork(vec3 a){ vec3 p = a - vec3(CX + 0.04, CY, 0.0);
float ring = length(vec2(length(vec2(p.y * 0.94, p.z * 1.1)) - 0.5, p.x)) - 0.026;
float rod = length(vec2(p.x, p.z)) - 0.034; rod = max(rod, abs(p.y - 0.62) - 0.14);
return min(smax(ring, -p.y - 0.02, 0.03), rod); }
float dBand(vec3 q){ vec3 p = q - vec3(0.0, BC, 0.0); float r = length(p.xy);
float b = rbox2(abs(vec2(r - RB, p.z)) - vec2(0.03, 0.105), 0.03);
// the slider block at each end, where the band takes the rod
vec3 e = abs(vec3(abs(p.x) - RB, p.y - 0.02, p.z)) - vec3(0.035, 0.07, 0.09);
float blk = length(max(e, 0.0)) + min(max(e.x, max(e.y, e.z)), 0.0) - 0.03;
return min(smax(b, -p.y + 0.06, 0.02), blk); }
float dPad(vec3 q){ vec3 p = q - vec3(0.0, BC, 0.0); float r = length(p.xy);
float d = rbox2(abs(vec2(r - RB + 0.085, p.z)) - vec2(0.025, 0.07), 0.035);
return smax(smax(d, abs(p.x) - 0.6, 0.18), -p.y, 0.02); }
float dHead(vec3 q){
vec3 a = vec3(abs(q.x), q.y, q.z);
float d = min(dShell(a), dCush(a));
d = min(d, dFork(a));
d = min(d, min(dBand(q), dPad(q)));
return d;
}
vec3 nHead(vec3 q){ vec2 e = vec2(0.0018, -0.0018); return normalize(e.xyy * dHead(q + e.xyy) + e.yyx * dHead(q + e.yyx) + e.yxy * dHead(q + e.yxy) + e.xxx * dHead(q + e.xxx)); }
// The round card the headphones stand on, a finger thick.
float dCard(vec3 p){ vec2 w = vec2(length(p.xz) - PR + 0.02, abs(p.y - 0.5 * PH) - 0.5 * PH + 0.02); return min(max(w.x, w.y), 0.0) + length(max(w, 0.0)) - 0.02; }
vec3 nCard(vec3 p){ vec2 e = vec2(0.0016, -0.0016); return normalize(e.xyy * dCard(p + e.xyy) + e.yyx * dCard(p + e.yyx) + e.yxy * dCard(p + e.yxy) + e.xxx * dCard(p + e.xxx)); }
vec2 bound(vec3 ro, vec3 rd){
float a = dot(rd.xz, rd.xz); float b = dot(ro.xz, rd.xz); float c = dot(ro.xz, ro.xz) - 1.5;
float h = b * b - a * c; if (h < 0.0 || a < 1e-6) return vec2(1.0, -1.0);
h = sqrt(h); float t0 = (-b - h) / a; float t1 = (-b + h) / a;
float y0 = PH + uLift - 0.01; float y1 = PH + uLift + YTOP;
if (abs(rd.y) > 1e-5) { float ya = (y0 - ro.y) / rd.y; float yb = (y1 - ro.y) / rd.y; t0 = max(t0, min(ya, yb)); t1 = min(t1, max(ya, yb)); }
else if (ro.y < y0 || ro.y > y1) return vec2(1.0, -1.0);
return vec2(max(t0, 0.0), t1);
}
float march(vec3 ro, vec3 rd){
vec2 tb = bound(ro, rd); if (tb.x > tb.y) return -1.0;
float t = tb.x;
for (int i = 0; i < 96; i++) { float d = dHead(toLocal(ro + rd * t)); if (d < 0.0008) return t; t += d * 0.9; if (t > tb.y) break; }
return -1.0;
}
float marchLo(vec3 ro, vec3 rd){
vec2 tb = bound(ro, rd); if (tb.x > tb.y) return -1.0;
float t = max(tb.x, 0.015);
for (int i = 0; i < 32; i++) { float d = dHead(toLocal(ro + rd * t)); if (d < 0.003) return t; t += d * 0.95; if (t > tb.y) break; }
return -1.0;
}
float marchCard(vec3 ro, vec3 rd){
if (rd.y > -1e-4) return -1.0;
float t = max((PH + 0.01 - ro.y) / rd.y, 0.0); float t1 = -ro.y / rd.y;
for (int i = 0; i < 24; i++) { float d = dCard(ro + rd * t); if (d < 0.0008) return t; t += d; if (t > t1) break; }
return -1.0;
}
// The studio: warm walls, a big window camera left, a strip light camera right, a scrim overhead and the sun.
vec3 env(vec3 rd){
float el = asin(clamp(rd.y, -1.0, 1.0)); float az = atan(rd.x, -rd.z);
vec3 c = mix(uPaper * 0.35 + 0.04, vec3(0.55, 0.5, 0.44), smoothstep(-0.1, 0.6, rd.y));
c += vec3(1.0, 0.99, 0.97) * (0.5 * smoothstep(0.42, 0.8, el) + 1.8 * smoothstep(0.86, 1.2, el));
vec2 w = abs(vec2(az + 0.9, el - 0.45)) - vec2(0.42, 0.34);
c += vec3(1.0, 0.98, 0.95) * 5.0 * smoothstep(0.06, -0.06, max(w.x, w.y));
vec2 w2 = abs(vec2(az - 1.0, el - 0.4)) - vec2(0.12, 0.45);
c += vec3(0.95, 0.98, 1.0) * 3.2 * smoothstep(0.05, -0.05, max(w2.x, w2.y));
c += SUNC * 26.0 * smoothstep(0.9965, 0.9992, dot(rd, uSun));
return c;
}
vec3 ambient(vec3 n){ return mix(uCard * 1.2 + 0.03, vec3(1.0, 0.98, 0.95) * 0.72, 0.5 + 0.5 * n.y); }
// How much sun reaches a point: soft where the blocker is far, crisp where it touches.
float sunVis(vec3 p){
float res = 1.0;
vec2 tb = bound(p, uSun);
if (tb.x < tb.y) {
float t = max(tb.x, 0.02);
for (int i = 0; i < 30; i++) { float h = dHead(toLocal(p + uSun * t)); res = min(res, 8.0 * h / t); t += clamp(h, 0.02, 0.25); if (res < 0.004 || t > tb.y) break; }
}
res = clamp(res, 0.0, 1.0); return res * res * (3.0 - 2.0 * res);
}
float hitStage(vec3 ro, vec3 rd, float top, out vec3 n){
n = vec3(0.0, 1.0, 0.0);
if (rd.y < 0.0) { float tf = -ro.y / rd.y; float z = ro.z + rd.z * tf; if (z < ZW - RC) return tf; }
if (rd.z > 0.0) { float tw = (ZW - ro.z) / rd.z; float y = ro.y + rd.y * tw; if (y > top) return -1.0; if (y > RC) { n = vec3(0.0, 0.0, -1.0); return tw; } }
vec2 o = ro.yz - vec2(RC, ZW - RC); float a = dot(rd.yz, rd.yz); float b = dot(o, rd.yz); float h = b * b - a * (dot(o, o) - RC * RC);
if (h > 0.0 && a > 1e-7) { float tc = (-b + sqrt(h)) / a; vec2 pc = ro.yz + rd.yz * tc; if (tc > 0.0 && pc.x < RC + 0.02 && pc.y > ZW - RC - 0.02) { vec2 nn = (vec2(RC, ZW - RC) - pc) / RC; n = vec3(0.0, nn.x, nn.y); return tc; } }
return -1.0;
}
float paperTooth(vec2 pq){ return 0.5 * (n2(pq * 150.0) - 0.5) + 0.3 * (n2(pq * 61.0 + 7.0) - 0.5) + 0.3 * (n2(pq * vec2(9.0, 240.0)) - 0.5); }
vec3 stage(vec3 ro, vec3 rd, float full){
vec3 n; float t = hitStage(ro, rd, full > 0.5 ? TOP : TOPR, n);
if (t < 0.0) return env(rd);
vec3 p = ro + rd * t;
vec2 pq = p.xy + p.z * vec2(0.37, 0.81);
vec3 alb = uPaper * (1.0 + 0.06 * paperTooth(pq) + 0.08 * (n2(pq * 1.7) - 0.5));
float ndl = max(dot(n, uSun), 0.0);
float vis = 1.0; float occ = 1.0;
if (full > 0.5) {
vis = ndl > 0.0 ? sunVis(p + n * 0.004) : 0.0;
float dc = dCard(p + n * 0.03);
occ = 0.55 + 0.45 * smoothstep(0.0, 0.14, dc);
} else {
if (n.y > 0.9) alb = mix(alb, uCard, smoothstep(PR + 0.1, PR - 0.1, length(p.xz)));
occ = 0.5 + 0.5 * smoothstep(0.4, 1.2, length(p.xz));
}
vec2 wq = p.xy - vec2(0.4, 1.2); float wash = exp(-dot(wq, wq) / 18.0);
vec3 fill = mix(uPaper * 1.2 + 0.04, vec3(0.9, 0.88, 0.85), 0.5 + 0.5 * n.y) * (1.0 + (1.2 * wash - 0.3) * (1.0 - n.y)) * 0.8;
ndl *= 1.0 - 0.45 * smoothstep(0.6, 2.8, p.y);
vec2 kq = p.xz - vec2(0.3, -0.2); float pool = 0.72 + 0.4 * exp(-dot(kq, kq) / 24.0);
return alb * (SUNC * SUNI * pool * ndl * vis + fill * occ * (1.0 - 0.2 * n.y));
}
// What the headphones are made of at a point. x: 0 shell plastic, 1 leather, 2 metal, 3 cloth over the driver.
vec4 skin(vec3 q){
vec3 a = vec3(abs(q.x), q.y, q.z);
float ds = dShell(a), dc = dCush(a), df = dFork(a), db = dBand(q), dp = dPad(q);
// a new colour sweeps from the left cup, over the band, to the right one
float s = q.x + 0.12 * sin(q.y * 6.0 + q.z * 4.0);
float k = smoothstep(-0.03, 0.03, (uProg * 3.0 - 1.5) - s);
vec3 shell = mix(uOldS, uNewS, k); vec3 lea = mix(uOldL, uNewL, k);
float m = min(min(ds, dc), min(df, min(db, dp)));
if (m == df) return vec4(vec3(0.3, 0.29, 0.28), 2.0);
if (m == dc || m == dp) return vec4(lea, 1.0);
if (m == ds && a.x < CX - 0.06) return vec4(lea * 0.35 + 0.01, 3.0);
return vec4(shell, 0.0);
}
// A mirror ray: the headphones again (roughly lit), or the set.
vec3 mirror(vec3 ro, vec3 rd){
float t = marchLo(ro, rd);
if (t > 0.0) {
vec3 q = toLocal(ro + rd * t); vec3 n = toWorldDir(nHead(q)); vec4 sk = skin(q);
return sk.rgb * (SUNC * SUNI * max(dot(n, uSun), 0.0) * 0.55 + ambient(n) * 0.6);
}
return stage(ro, rd, 0.0);
}
float aoHead(vec3 p, vec3 n){
float a = 0.0; float w = 1.0;
for (int i = 1; i <= 5; i++) { float d = 0.03 * float(i) + 0.012 * float(i * i); float h = min(dHead(toLocal(p + n * d)), p.y + n.y * d - PH); a += w * (d - h); w *= 0.6; }
return clamp(1.0 - 2.2 * a, 0.0, 1.0);
}
vec3 shadeHead(vec3 p, vec3 rd){
vec3 q = toLocal(p); vec3 nl = nHead(q);
vec4 sk = skin(q); float id = sk.a;
// surface texture: leather grain and stitched creases, a fine spark erosion on the plastic
vec3 aq = vec3(abs(q.x), q.y, q.z);
if (id == 1.0) {
float g = n2(aq.yz * 70.0 + aq.x * 31.0) + 0.5 * n2(aq.zy * 160.0 + aq.x * 11.0);
float ang = atan(q.z, q.y - CY); float cr = pow(n2(vec2(ang * 16.0, aq.x * 9.0)), 2.0) * smoothstep(0.42, 0.25, length(vec2(q.y - CY, q.z)));
nl = normalize(nl + 0.07 * (vec3(g, n2(aq.xz * 80.0), n2(aq.xy * 80.0)) - 0.6) + 0.16 * (cr - 0.2) * vec3(0.0, cos(ang), sin(ang)));
} else if (id == 0.0) {
nl = normalize(nl + 0.018 * (vec3(n2(aq.yz * 220.0), n2(aq.xz * 220.0), n2(aq.xy * 220.0)) - 0.5));
}
vec3 n = toWorldDir(nl);
float ndl = max(dot(n, uSun), 0.0);
float vis = ndl > 0.0 ? sunVis(p + n * 0.012) : 0.0;
float ao = aoHead(p, n);
vec3 alb = sk.rgb;
if (id == 1.0) alb *= 0.9 + 0.2 * n2(aq.yz * 9.0 + aq.x * 5.0);
if (id == 0.0) alb *= 0.97 + 0.06 * n2(aq.yz * 4.0 + aq.x * 3.0);
// matte plastic lets a little light into its skin, so the turned-away side never goes dead
float wrap = id == 0.0 ? 0.18 : (id == 1.0 ? 0.1 : 0.0);
float diff = max((dot(n, uSun) + wrap) / (1.0 + wrap), 0.0) * mix(vis, 1.0, wrap * 0.5);
vec3 col = alb * (SUNC * SUNI * diff + ambient(n) * ao);
float rough = id == 0.0 ? 0.42 : (id == 1.0 ? 0.55 : (id == 2.0 ? 0.3 : 0.9));
vec3 h = normalize(uSun - rd); float ndh = max(dot(n, h), 0.0);
float e = 2.0 / (rough * rough * rough * rough) - 2.0;
float nv = clamp(dot(-rd, n), 0.0, 1.0);
float f0 = id == 2.0 ? 0.6 : 0.045;
float f = f0 + (1.0 - f0) * pow(1.0 - nv, 5.0);
vec3 tint = id == 2.0 ? alb : vec3(1.0);
col += tint * SUNC * SUNI * vis * ndl * pow(ndh, e) * (e + 8.0) / 25.0 * f * (id == 3.0 ? 0.0 : 1.0);
// leather has a soft sheen at grazing angles
if (id == 1.0) col += alb * 0.35 * pow(1.0 - nv, 3.0) * ao;
vec3 r = normalize(reflect(rd, n) + gRnd * rough * 0.9);
vec3 refl = mirror(p + n * 0.012, r);
float kr = f * (1.0 - rough * 0.75) * (id == 3.0 ? 0.0 : 1.0);
return col * (1.0 - kr * (id == 2.0 ? 0.6 : 0.2)) + refl * tint * kr * (0.4 + 0.6 * ao);
}
vec3 shadeCard(vec3 p, vec3 rd){
vec3 n = nCard(p);
vec3 alb = uCard * (1.0 + 0.08 * paperTooth(p.xz) + 0.08 * (n2(p.xz * 2.3) - 0.5));
float ndl = max(dot(n, uSun), 0.0);
float vis = ndl > 0.0 ? sunVis(p + n * 0.004) : 0.0;
float dm = dHead(toLocal(p + n * 0.04));
float occ = (0.3 + 0.7 * smoothstep(0.0, 0.45, dm)) * (0.6 + 0.4 * smoothstep(0.0, 0.08, p.y + 0.05 * n.y));
vec3 bleed = mix(uOldS, uNewS, uProg) * 0.4 * exp(-max(dm, 0.0) * 6.0);
vec3 fill = mix(uPaper * 1.4 + 0.08, vec3(1.0, 0.98, 0.95), 0.5 + 0.5 * n.y);
return alb * (SUNC * SUNI * 1.05 * ndl * vis + fill * occ * (1.0 - 0.2 * n.y) + bleed);
}
void main(){
vec2 fc = gl_FragCoord.xy + uJit.xy;
vec2 uv = (fc - 0.5 * uRes) / uRes.y - uShift;
vec3 fw = normalize(uTgt - uCam); vec3 rt = normalize(cross(vec3(0.0, 1.0, 0.0), fw)); vec3 up = cross(fw, rt);
vec3 rd = normalize(fw * uFoc + rt * uv.x + up * uv.y);
vec3 ro = uCam;
vec3 fp = ro + rd * (uFocus / dot(rd, fw));
ro += rt * uJit.z + up * uJit.w; rd = normalize(fp - ro);
float ign = fract(52.9829189 * fract(dot(gl_FragCoord.xy, vec2(0.06711056, 0.00583715))) + uSeed);
gRnd = uSeed > 0.001 ? (vec3(h21(gl_FragCoord.xy + ign * 17.0), h21(gl_FragCoord.yx + ign * 31.0), ign) - 0.5) * 2.0 : vec3(0.0);
float tm = march(ro, rd); float tc = marchCard(ro, rd);
vec3 col;
if (tm > 0.0 && (tc < 0.0 || tm < tc)) col = shadeHead(ro + rd * tm, rd);
else if (tc > 0.0) col = shadeCard(ro + rd * tc, rd);
else col = stage(ro, rd, 1.0);
col = min(col, vec3(14.0));
if (uDirect > 0.5) col = tone(col);
outC = vec4(col, 1.0);
}
`;
// Developing the negative: bloom off hot glints, the film curve, a soft vignette and grain.
const POST = `
precision highp float;
uniform sampler2D uAcc; uniform vec2 uRes; uniform float uGrain; uniform vec2 uCentre;
${TONE}
float h21(vec2 p){ vec3 q = fract(vec3(p.xyx) * 0.1031); q += dot(q, q.yzx + 33.33); return fract((q.x + q.y) * q.z); }
void main(){
vec2 uv = gl_FragCoord.xy / uRes;
vec3 c = texture2D(uAcc, uv).rgb;
vec2 px = 1.0 / uRes;
vec3 nb = texture2D(uAcc, uv + vec2(px.x, 0.0)).rgb + texture2D(uAcc, uv - vec2(px.x, 0.0)).rgb + texture2D(uAcc, uv + vec2(0.0, px.y)).rgb + texture2D(uAcc, uv - vec2(0.0, px.y)).rgb;
c = max(c + (c - nb * 0.25) * 0.35, 0.0);
vec3 b = vec3(0.0);
for (int i = 0; i < 16; i++) {
float a = float(i) * 2.39996; float r = sqrt((float(i) + 0.5) / 16.0);
vec3 s = texture2D(uAcc, uv + vec2(cos(a), sin(a)) * r * 0.02 * vec2(uRes.y / uRes.x, 1.0)).rgb;
b += min(max(s - 3.0, 0.0), vec3(8.0)) * (1.0 - 0.6 * r);
}
c += b * 0.016;
vec2 q = (uv - uCentre) * vec2(uRes.x / uRes.y, 1.0);
c *= 1.0 - 0.14 * smoothstep(0.4, 1.3, length(q));
c = tone(c);
float g = h21(gl_FragCoord.xy + uGrain * 91.7) - 0.5;
c += g * 0.016 * (1.0 - 0.4 * c.g);
outC = vec4(c, 1.0);
}
`;
type Spot = { x: number; y: number; k: number };
// No WebGL: the same headphones drawn as a lit vector still at the same spot and scale (k pixels per scene unit).
function Still({ at, sel }: { at: Spot; sel: number }) {
const c = colourways[sel];
const k = at.k;
return (
<svg aria-hidden="true" className="absolute overflow-visible" style={{ left: at.x - 1.6 * k, top: at.y - 2.5 * k, width: 3.2 * k, height: 2.9 * k }} viewBox="-1.6 -2.5 3.2 2.9">
<defs>
<radialGradient id="hp-still-cup" cx="0.35" cy="0.3" r="0.8">
<stop offset="0" stopColor="#fff" stopOpacity="0.45" />
<stop offset="0.5" stopColor="#fff" stopOpacity="0" />
<stop offset="1" stopColor="#000" stopOpacity="0.35" />
</radialGradient>
<radialGradient id="hp-still-shadow" cx="0.5" cy="0.5" r="0.5">
<stop offset="0" stopColor="#000" stopOpacity="0.35" />
<stop offset="1" stopColor="#000" stopOpacity="0" />
</radialGradient>
</defs>
<ellipse cx="0.25" cy="0.04" rx="1.5" ry="0.3" fill="url(#hp-still-shadow)" />
<ellipse cx="0" cy="0.02" rx="1.45" ry="0.32" fill="#000" fillOpacity="0.12" />
<path d="M -0.62 -1.3 A 0.66 0.58 0 0 1 0.62 -1.3" fill="none" stroke={c.leather} strokeWidth="0.08" strokeLinecap="round" style={{ transition: "stroke 600ms" }} />
<path d="M -0.86 -0.9 A 0.88 1.05 0 0 1 0.86 -0.9" fill="none" stroke={c.shell} strokeWidth="0.15" strokeLinecap="round" style={{ transition: "stroke 600ms" }} />
<rect x="-0.92" y="-1.05" width="0.06" height="0.3" fill="#9b968f" />
<rect x="0.86" y="-1.05" width="0.06" height="0.3" fill="#9b968f" />
<ellipse cx="0.72" cy="-0.5" rx="0.3" ry="0.5" fill={c.leather} style={{ transition: "fill 600ms" }} />
<ellipse cx="-0.86" cy="-0.5" rx="0.26" ry="0.5" fill={c.shell} style={{ transition: "fill 600ms" }} />
<ellipse cx="-0.86" cy="-0.5" rx="0.26" ry="0.5" fill="url(#hp-still-cup)" />
<ellipse cx="0.92" cy="-0.5" rx="0.24" ry="0.49" fill={c.shell} style={{ transition: "fill 600ms" }} />
<ellipse cx="0.92" cy="-0.5" rx="0.24" ry="0.49" fill="url(#hp-still-cup)" />
</svg>
);
}
export default function RayMarchedWirelessHeadphonesHero() {
const stage = useRef<HTMLDivElement>(null);
const canvas = useRef<HTMLCanvasElement>(null);
const hit = useRef<HTMLDivElement>(null);
const [shown, setShown] = useState<"wait" | "gl" | "still">("wait");
const [sel, setSel] = useState(0);
const [bag, setBag] = useState(0);
const [spot, setSpot] = useState<Spot | null>(null);
const api = useRef<{ swap: (i: number) => void; hop: () => void; turn: () => void } | null>(null);
useEffect(() => {
const box = stage.current;
if (!box) return;
const place = () => {
const r = box.getBoundingClientRect();
const f = frameOf(Math.max(1, r.width), Math.max(1, r.height));
setSpot(f.project(0, 0.1, 0));
};
place();
const ro = new ResizeObserver(place);
ro.observe(box);
return () => ro.disconnect();
}, []);
useEffect(() => {
const box = stage.current, cv = canvas.current, pad = hit.current;
if (!box || !cv || !pad) return;
const reduce = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
const opts = { antialias: false, alpha: false, powerPreference: "high-performance" as const };
const gl2 = cv.getContext("webgl2", opts) as WebGL2RenderingContext | null;
const gl = (gl2 ?? cv.getContext("webgl", opts)) as WebGLRenderingContext | null;
if (!gl) { setShown("still"); return; }
const canAcc = !!gl2 && (!!gl2.getExtension("EXT_color_buffer_float") || !!gl2.getExtension("EXT_color_buffer_half_float"));
const info = gl.getExtension("WEBGL_debug_renderer_info");
const renderer = info ? String(gl.getParameter(info.UNMASKED_RENDERER_WEBGL)) : "";
const software = /swiftshader|llvmpipe|software|basic render/i.test(renderer);
const still = reduce || software;
const head = gl2 ? "#version 300 es\n#define ATTR in\n" : "#define ATTR attribute\n";
const fhead = gl2 ? "#version 300 es\n#define texture2D texture\nprecision highp float;\nout vec4 outC;\n" : "#define outC gl_FragColor\n";
const compile = (type: number, src: string) => {
const sh = gl.createShader(type);
if (!sh) return null;
gl.shaderSource(sh, src); gl.compileShader(sh);
if (!gl.getShaderParameter(sh, gl.COMPILE_STATUS)) { console.warn(gl.getShaderInfoLog(sh)); return null; }
return sh;
};
const link = (frag: string) => {
const v = compile(gl.VERTEX_SHADER, head + VERT), f = compile(gl.FRAGMENT_SHADER, fhead + frag);
const p = gl.createProgram();
if (!v || !f || !p) return null;
gl.attachShader(p, v); gl.attachShader(p, f); gl.bindAttribLocation(p, 0, "aPos"); gl.linkProgram(p);
return gl.getProgramParameter(p, gl.LINK_STATUS) ? p : null;
};
const scene = link(SCENE), post = canAcc ? link(POST) : null;
if (!scene || (canAcc && !post)) { setShown("still"); return; }
const U = (p: WebGLProgram, n: string) => gl.getUniformLocation(p, n);
const su = Object.fromEntries(["uRes", "uJit", "uSeed", "uDirect", "uCam", "uTgt", "uFoc", "uShift", "uFocus", "uRot", "uLift", "uSun", "uOldS", "uNewS", "uOldL", "uNewL", "uProg", "uPaper", "uCard"].map((n) => [n, U(scene, n)]));
const pu = post ? Object.fromEntries(["uAcc", "uRes", "uGrain", "uCentre"].map((n) => [n, U(post, n)])) : {};
const quad = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, quad);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([-1, -1, 3, -1, -1, 3]), gl.STATIC_DRAW);
gl.enableVertexAttribArray(0); gl.vertexAttribPointer(0, 2, gl.FLOAT, false, 0, 0);
const acc = canAcc ? gl.createTexture() : null;
const fbo = canAcc ? gl.createFramebuffer() : null;
let W = 0, H = 0, scale = 1, cssW = 1, cssH = 1;
const size = () => {
const r = box.getBoundingClientRect();
cssW = Math.max(1, r.width); cssH = Math.max(1, r.height);
const dpr = Math.min(software ? 1 : 1.75, window.devicePixelRatio || 1) * scale;
// never more than about 1.8 million pixels of tracing
const k = Math.min(1, Math.sqrt(1.8e6 / (cssW * cssH * dpr * dpr)));
const w = Math.max(2, Math.round(cssW * dpr * k)), h = Math.max(2, Math.round(cssH * dpr * k));
if (w === W && h === H) return;
W = w; H = h; cv.width = W; cv.height = H;
if (gl2 && acc && fbo) {
gl.activeTexture(gl.TEXTURE1); gl.bindTexture(gl.TEXTURE_2D, acc);
gl2.texImage2D(gl.TEXTURE_2D, 0, gl2.RGBA16F, W, H, 0, gl.RGBA, gl2.HALF_FLOAT, null);
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);
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, acc, 0);
gl.bindFramebuffer(gl.FRAMEBUFFER, null);
}
s.count = 0; s.fresh = true;
};
const ways = colourways.map((c) => ({ shell: lin(c.shell), leather: lin(c.leather), paper: lin(c.paper) }));
const s = {
a: HERO, v: 0, rest: HERO as number | null, drag: false, spinT: -1, spinFrom: HERO, spinTo: HERO, spinLen: 1,
cur: 0, old: 0, prog: 1, paper: ways[0].paper.slice(),
ly: 0, lv: 0,
count: 0, fresh: true, frame: 0, slow: 0,
visible: true, raf: 0, last: 0, t0: 0, touched: false, demoAt: 0, first: true, alive: true,
};
const halton = (i: number, b: number) => { let f = 1, r = 0; while (i > 0) { f /= b; r += f * (i % b); i = Math.floor(i / b); } return r; };
const draw = (alpha: number, sample: number) => {
const f = frameOf(cssW, cssH);
const jx = sample ? halton(sample, 2) - 0.5 : 0, jy = sample ? halton(sample, 3) - 0.5 : 0;
const la = halton(sample, 5) * Math.PI * 2, lr = sample ? Math.sqrt(halton(sample, 7)) * 0.06 : 0;
const sj = sample ? 0.03 : 0, sa = -0.85 + (halton(sample, 11) - 0.5) * sj, se = 0.62 + (halton(sample, 13) - 0.5) * sj;
gl.useProgram(scene);
gl.bindFramebuffer(gl.FRAMEBUFFER, canAcc ? fbo : null);
gl.viewport(0, 0, W, H);
if (canAcc && alpha < 1) { gl.enable(gl.BLEND); gl.blendColor(0, 0, 0, alpha); gl.blendFunc(gl.CONSTANT_ALPHA, gl.ONE_MINUS_CONSTANT_ALPHA); } else gl.disable(gl.BLEND);
gl.uniform2f(su.uRes, W, H);
gl.uniform4f(su.uJit, canAcc ? jx : 0, canAcc ? jy : 0, canAcc ? Math.cos(la) * lr : 0, canAcc ? Math.sin(la) * lr : 0);
gl.uniform1f(su.uSeed, canAcc && sample ? (sample * 0.61803) % 1 || 0.5 : 0);
gl.uniform1f(su.uDirect, canAcc ? 0 : 1);
gl.uniform3f(su.uCam, f.cam[0], f.cam[1], f.cam[2]); gl.uniform3f(su.uTgt, f.tgt[0], f.tgt[1], f.tgt[2]);
gl.uniform1f(su.uFoc, f.foc);
gl.uniform2f(su.uShift, f.shift[0], f.shift[1]);
gl.uniform1f(su.uFocus, f.dist);
gl.uniform1f(su.uRot, s.a); gl.uniform1f(su.uLift, s.ly);
gl.uniform3f(su.uSun, Math.sin(sa) * Math.cos(se), Math.sin(se), -Math.cos(sa) * Math.cos(se));
const o = ways[s.old], n = ways[s.cur];
gl.uniform3fv(su.uOldS, o.shell); gl.uniform3fv(su.uNewS, n.shell);
gl.uniform3fv(su.uOldL, o.leather); gl.uniform3fv(su.uNewL, n.leather);
gl.uniform1f(su.uProg, s.prog);
gl.uniform3fv(su.uPaper, s.paper);
gl.uniform3fv(su.uCard, s.paper.map((x) => x * 0.62));
gl.drawArrays(gl.TRIANGLES, 0, 3);
if (canAcc && post) {
gl.bindFramebuffer(gl.FRAMEBUFFER, null);
gl.disable(gl.BLEND);
gl.useProgram(post);
gl.uniform1i(pu.uAcc, 1); gl.uniform2f(pu.uRes, W, H);
gl.uniform1f(pu.uGrain, still ? 1 : s.frame % 64);
gl.uniform2f(pu.uCentre, cssW >= 768 ? 0.62 : 0.5, 0.5);
gl.drawArrays(gl.TRIANGLES, 0, 3);
}
};
const back = (x: number) => { const c = 1.1; return x < 0.5 ? (Math.pow(2 * x, 2) * ((c + 1) * 2 * x - c)) / 2 : (Math.pow(2 * x - 2, 2) * ((c + 1) * (x * 2 - 2) + c) + 2) / 2; };
const spin = (by: number, secs: number) => {
if (s.drag) return;
const from = s.spinT >= 0 ? s.spinTo : s.rest ?? s.a;
s.spinT = 0; s.spinFrom = s.a; s.spinTo = from + by; s.spinLen = secs; s.rest = s.spinTo;
};
const swap = (i: number, fromUser: boolean) => {
if (fromUser) s.touched = true;
if (i === s.cur) return;
s.old = s.cur; s.cur = i;
if (reduce) { s.prog = 1; s.paper = ways[i].paper.slice(); } else { s.prog = 0; spin(Math.PI * 2, 2.1); }
s.count = 0; s.fresh = reduce;
wake();
};
api.current = {
swap: (i) => swap(i, true),
hop: () => { s.touched = true; if (!reduce && s.ly < 0.01) { s.lv = 3.2; s.ly = 0.001; s.v += 2.0; wake(); } },
turn: () => { s.touched = true; if (reduce) { s.a += Math.PI / 2; s.rest = s.a; s.count = 0; s.fresh = true; } else spin(Math.PI / 2, 0.9); wake(); },
};
const frame = (now: number) => {
s.raf = 0;
if (!s.visible || !s.alive) return;
const dtRaw = s.last ? (now - s.last) / 1000 : 0.016;
const dt = Math.min(0.033, dtRaw);
s.last = now; s.frame++;
// opens finished and holds; then, until someone touches it, tries the next colour every few seconds
if (!s.t0) { s.t0 = now; s.demoAt = now + 4800; }
if (!still && !s.touched && now > s.demoAt) { const next = (s.cur + 1) % colourways.length; swap(next, false); setSel(next); s.demoAt = now + 6200; }
let moving = false;
if (!reduce) {
if (s.spinT >= 0) { s.spinT += dt / s.spinLen; if (s.spinT >= 1) s.spinT = -1; }
if (!s.drag) {
if (s.rest !== null) {
const want = s.spinT >= 0 ? s.spinFrom + (s.spinTo - s.spinFrom) * back(s.spinT) : s.rest;
const stiff = s.spinT >= 0 ? 150 : 46, damp = s.spinT >= 0 ? 22 : 8;
for (let i = 0; i < 3; i++) { s.v += (stiff * (want - s.a) - damp * s.v) * (dt / 3); s.a += s.v * (dt / 3); }
if (s.spinT < 0 && Math.abs(s.v) < 0.003 && Math.abs(want - s.a) < 0.0006) { s.a = want; s.v = 0; } else moving = true;
} else {
s.v *= Math.exp(-dt * 2.4); s.a += s.v * dt;
if (Math.abs(s.v) < 0.012) s.v = 0; else moving = true;
}
} else moving = true;
if (s.prog < 1) {
s.prog = Math.min(1, s.prog + dt / SWAP); moving = true;
// the paper follows a beat behind the shell
const p = ways[s.cur].paper, k = 1 - Math.exp(-dt * 3.2);
s.paper = s.paper.map((x, j) => x + (p[j] - x) * k);
} else {
const p = ways[s.cur].paper;
if (s.paper.some((x, j) => Math.abs(p[j] - x) > 0.002)) { s.paper = s.paper.map((x, j) => x + (p[j] - x) * (1 - Math.exp(-dt * 3.2))); moving = true; }
else s.paper = p.slice();
}
if (s.ly > 0 || s.lv !== 0) {
s.lv -= 24 * dt; s.ly += s.lv * dt;
if (s.ly <= 0) { s.ly = 0; s.lv = s.lv < -1.3 ? -s.lv * 0.28 : 0; }
moving = true;
}
}
if (s.fresh || !canAcc) { draw(1, 0); s.fresh = false; s.count = 1; }
else if (moving) { draw(0.6, 1 + (s.frame % 64)); s.count = 3; }
else if (s.count < 64) { s.count++; draw(1 / s.count, s.count); }
if (s.first) { s.first = false; setShown("gl"); }
if (!still && moving && dtRaw > 0.026) s.slow++; else s.slow = Math.max(0, s.slow - 2);
if (s.slow > 40 && scale > 0.5) { scale *= 0.82; s.slow = 0; size(); }
if (moving || s.count < 64 || (!still && !s.touched)) s.raf = requestAnimationFrame(frame);
};
const wake = () => { if (!s.raf && s.visible && s.alive) { s.last = 0; s.raf = requestAnimationFrame(frame); } };
size();
const ro = new ResizeObserver(() => { size(); wake(); });
ro.observe(box);
const io = new IntersectionObserver(([e]) => { s.visible = e.isIntersecting && !document.hidden; if (s.visible) wake(); }, { threshold: 0.05 });
io.observe(box);
const vis = () => { s.visible = !document.hidden; if (s.visible) wake(); };
document.addEventListener("visibilitychange", vis);
let downX = 0, id = -1, lastT = 0;
const down = (e: PointerEvent) => {
id = e.pointerId; downX = e.clientX; lastT = e.timeStamp; s.drag = true; s.touched = true; s.spinT = -1; s.v = 0; s.rest = null;
try { pad.setPointerCapture(id); } catch { /* the pointer is already gone */ }
wake();
};
const move = (e: PointerEvent) => {
if (!s.drag || e.pointerId !== id) return;
const dx = e.clientX - downX; downX = e.clientX;
const da = dx * 0.01, dtp = Math.max(0.008, (e.timeStamp - lastT) / 1000); lastT = e.timeStamp;
s.a += da; s.v = s.v * 0.5 + (da / dtp) * 0.5;
if (reduce) { s.count = 0; s.fresh = true; }
wake();
};
const upFn = (e: PointerEvent) => {
if (!s.drag || e.pointerId !== id) return;
s.drag = false;
s.v = reduce ? 0 : Math.max(-12, Math.min(12, s.v));
wake();
};
pad.addEventListener("pointerdown", down);
pad.addEventListener("pointermove", move);
pad.addEventListener("pointerup", upFn);
pad.addEventListener("pointercancel", upFn);
const lost = (e: Event) => { e.preventDefault(); setShown("still"); };
cv.addEventListener("webglcontextlost", lost);
wake();
return () => {
s.alive = false;
cancelAnimationFrame(s.raf); ro.disconnect(); io.disconnect();
document.removeEventListener("visibilitychange", vis);
pad.removeEventListener("pointerdown", down); pad.removeEventListener("pointermove", move);
pad.removeEventListener("pointerup", upFn); pad.removeEventListener("pointercancel", upFn);
cv.removeEventListener("webglcontextlost", lost);
api.current = null;
};
}, []);
const pick = (i: number) => { setSel(i); api.current?.swap(i); };
const add = () => { setBag((b) => b + 1); api.current?.hop(); };
const way = colourways[sel];
return (
<section className="relative isolate overflow-hidden transition-colors duration-1000 motion-reduce:transition-none" style={{ fontFamily: FONT, color: INK, backgroundColor: way.paper }}>
<style>{`
@keyframes ray-marched-headphones-rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
.ray-marched-headphones-rise { animation: ray-marched-headphones-rise 700ms cubic-bezier(0.2, 0.9, 0.2, 1) both; }
@keyframes ray-marched-headphones-name { from { opacity: 0; transform: translateY(0.5em); } to { opacity: 1; transform: none; } }
.ray-marched-headphones-name { display: inline-block; animation: ray-marched-headphones-name 520ms cubic-bezier(0.2, 1.2, 0.3, 1) both; }
@keyframes ray-marched-headphones-count { 0% { transform: scale(1); } 35% { transform: scale(1.45); } 100% { transform: scale(1); } }
.ray-marched-headphones-count { animation: ray-marched-headphones-count 420ms cubic-bezier(0.2, 0.9, 0.2, 1) both; }
@media (prefers-reduced-motion: reduce) { .ray-marched-headphones-rise, .ray-marched-headphones-name, .ray-marched-headphones-count { animation: none; } }
`}</style>
<div ref={stage} className="relative mx-auto h-[780px] w-full max-w-[1600px] md:h-[760px]">
{shown === "still" && spot && <Still at={spot} sel={sel} />}
<canvas ref={canvas} aria-hidden="true" className={`absolute inset-0 h-full w-full transition-opacity duration-700 motion-reduce:transition-none ${shown === "gl" ? "opacity-100" : "opacity-0"}`} />
<div ref={hit} aria-hidden="true" className="absolute inset-0 cursor-grab select-none active:cursor-grabbing" style={{ touchAction: "pan-y" }} />
<div className="pointer-events-none absolute inset-0 flex flex-col px-6 pb-7 pt-6 md:px-10 md:pb-10 md:pt-8 lg:px-16 lg:pb-12 lg:pt-10">
<p className="flex items-center justify-between text-[11px] font-semibold uppercase tracking-[0.32em]">
<span>{product.maker}</span>
<span className="flex items-center gap-3">
Bag
<span key={bag} className={`grid h-7 min-w-[28px] place-items-center rounded-full px-2 text-[12px] tracking-normal ${bag ? "ray-marched-headphones-count" : ""}`} style={{ backgroundColor: INK, color: way.paper }}>{bag}</span>
</span>
</p>
<div className="ray-marched-headphones-rise mt-auto md:mb-auto md:mt-[52px]">
<p className="text-[17px] italic md:text-[19px] lg:text-[21px]" style={{ fontFamily: SERIF }}>{product.kind}</p>
<h2 className="mt-1 text-[72px] font-extrabold leading-[0.82] tracking-[-0.06em] md:mt-3 md:text-[112px] lg:text-[156px]">
{product.name.map((line) => <span key={line} className="block">{line}</span>)}
</h2>
<p className="mt-3 text-[20px] italic leading-none md:mt-5 md:text-[25px] lg:mt-6 lg:text-[30px]" style={{ fontFamily: SERIF }}>
finished in <span key={way.name} className="ray-marched-headphones-name not-italic font-extrabold tracking-[-0.03em]" style={{ fontFamily: FONT }}>{way.name}</span>
</p>
</div>
<div className="ray-marched-headphones-rise mt-5 md:mt-0">
<div role="group" aria-label="Colour" className="pointer-events-auto mb-4 flex gap-2 md:mb-6">
{colourways.map((c, i) => (
<button key={c.name} type="button" aria-pressed={i === sel} aria-label={c.name} onClick={() => pick(i)} className="group grid h-11 w-11 place-items-center rounded-full outline-none focus-visible:ring-2 focus-visible:ring-offset-2" style={{ ["--tw-ring-color" as string]: INK, ["--tw-ring-offset-color" as string]: way.paper }}>
<span className={`relative block h-8 w-8 rounded-full transition-transform duration-300 group-hover:scale-110 motion-reduce:transition-none ${i === sel ? "scale-110" : ""}`} style={{ background: `radial-gradient(circle at 34% 28%, rgba(255,255,255,0.55), rgba(255,255,255,0) 38%), radial-gradient(circle at 60% 70%, rgba(0,0,0,0) 40%, rgba(0,0,0,0.28) 100%), ${c.shell}`, boxShadow: i === sel ? `0 0 0 2px ${c.paper}, 0 0 0 4px ${INK}, 0 6px 10px -4px rgba(0,0,0,0.45)` : "0 6px 10px -4px rgba(0,0,0,0.45), inset 0 -2px 3px rgba(0,0,0,0.18)" }}>
<span className="absolute bottom-[3px] right-[3px] h-3 w-3 rounded-full" style={{ background: c.leather, boxShadow: "0 0 0 1.5px rgba(0,0,0,0.12)" }} />
</span>
</button>
))}
</div>
<div className="flex flex-wrap items-center gap-x-5 gap-y-3">
<span className="text-[52px] font-extrabold leading-none tracking-[-0.055em] md:text-[64px] lg:text-[88px]" style={{ fontVariantNumeric: "tabular-nums" }}>{product.price}</span>
<button type="button" onClick={add} className="pointer-events-auto inline-flex h-[60px] items-center gap-3 whitespace-nowrap rounded-full pl-8 pr-7 text-[19px] font-bold tracking-[-0.02em] shadow-[0_1px_0_rgba(255,255,255,0.25)_inset,0_16px_30px_-14px_rgba(40,20,0,0.8)] outline-none transition-transform duration-200 hover:-translate-y-0.5 focus-visible:ring-2 focus-visible:ring-offset-2 active:translate-y-0.5 active:scale-[0.98] motion-reduce:transition-none lg:h-[68px] lg:text-[22px]" style={{ backgroundColor: INK, color: way.paper, ["--tw-ring-color" as string]: INK, ["--tw-ring-offset-color" as string]: way.paper }}>
{product.cta}
<svg aria-hidden="true" viewBox="0 0 20 20" className="h-5 w-5" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M4.5 7h11l-.8 9.5H5.3L4.5 7ZM7.3 7V5.7a2.7 2.7 0 0 1 5.4 0V7" /></svg>
</button>
<span className="w-full text-[11px] font-semibold uppercase tracking-[0.22em] lg:mt-1">{product.note}</span>
</div>
</div>
</div>
<p aria-live="polite" className="sr-only">{bag ? `${bag} in your bag. ${product.name.join(" ")} in ${way.name} added.` : ""}</p>
{shown === "gl" && (
<button type="button" onClick={() => api.current?.turn()} className="absolute right-3 top-[58px] flex h-10 items-center gap-2 rounded-full px-3 text-[10px] font-semibold uppercase tracking-[0.28em] outline-none hover:opacity-70 focus-visible:ring-2 md:right-7 md:top-[66px] md:text-[11px] lg:right-[52px] lg:top-[78px]" style={{ ["--tw-ring-color" as string]: INK }}>
<svg aria-hidden="true" viewBox="0 0 20 20" className="h-4 w-4" fill="none" stroke="currentColor" strokeWidth="1.8" strokeLinecap="round" strokeLinejoin="round"><path d="M16.5 10a6.5 6.5 0 1 1-2.2-4.9M16.6 3.2v3.4h-3.4" /></svg>
<span><span className="hidden md:inline">Drag or press to turn</span><span className="md:hidden">Turn</span></span>
</button>
)}
</div>
</section>
);
}
Install with one command: npx shadcn@latest add https://we.inc/r/ray-marched-wireless-headphones-product-hero-in-matte-plastic-and-leather-on-a-paper-sweep-that-recolours-with-each-swatch.json
Every part is a distance function. The cups are rounded ovals with a shallow dome on the outside, each cushion is a squashed ring, the forks are thin rings cut in half, and the band is an arc with a narrower padded arc beneath it. Mirroring across the middle means one side is written and the other comes free.
Each material gets its own roughness. The plastic has a broad, dim highlight, a fine speckle in its surface and a little light wrapping past the shadow line. The leather is rougher still, carries a grain and creases in its surface direction, and picks up a sheen at grazing angles, which is how real cushions catch a window.
A front moves from one side of the headphones to the other over a gentle wave, and everything behind it takes the new shell and cushion colour. The paper sweep and the card ease toward their new colour a beat later, and the page background follows with a CSS transition so the edges match.
The drawing buffer is capped near 1.8 million pixels, rays only walk the headphones inside a tight cylinder around them, and when nothing moves the image is averaged over sixty-four passes and the loop stops. If frames run long while it spins, the canvas drops a step of resolution, and it pauses whenever it is off screen.
A flat drawing of the same headphones at the same place and size, coloured from the chosen finish, with the paper colour still changing behind it. The name, chips, price and button are plain HTML either way.
Related: Ray-Marched Stoneware Mug Product Showcase You Turn by Dragging, With Glaze That Pours Down in the Colour You Pick on a Yellow Sweep, Ray-Marched Fluted Stoneware Vase Product Card on a Paper Plinth with a Colourway Glaze Wipe and Drag to Turn, Ray-Marched Glass Perfume Bottle Hero That Bends a Giant Painted Headline Through Amber Scent on a Pink Paper Sweep, Ray-Marched Tangerine Resin Rocker Switch with a Lamp Inside That Glows Through the Plastic and Spills Across a Lilac Table.
More ecommerce or all free UI components. Start for free to have a full site built around it.
We.Inc is an AI-powered website builder you can resell under your own brand. Launch a branded client dashboard, bill on Stripe Connect, and deliver AI-generated websites in minutes. White-label plans start at $99 a month for 25 client sites, with a 7-day free trial and no per-site fees.