09Macro-photo scene — one flake in shallow depth of field on a dark stage
Light a dark stage with a radial gradient, grow one large flake, and you get a microscopy shot — afterglow and drifting motes keep the frame alive.
Best forFront-door hero, print artwork
createRadialGradientImageDatarequestAnimationFrame
<main class="stage">
<div class="cd is-demo" id="cdRoot">
<p class="cd__hint">
<svg class="cd__ico" viewBox="0 0 256 256" aria-hidden="true"><g fill="none" stroke="currentColor" stroke-width="14" stroke-linecap="round"><path d="M128 26v204"/><path d="M43 74l170 128"/><path d="M213 74L43 202"/><path d="M106 40l22 18 22-18"/><path d="M106 216l22-18 22 18"/><path d="M40 106l18 22-18 22"/><path d="M216 106l-18 22 18 22"/></g></svg>
<span>Light a black stage from the center and grow the crystal large for a macro-photo look — trailing streaks and floating particles keep it alive</span>
</p>
<div class="cd__field" id="cdField" role="application" aria-label="Macro Photography Crystal Scene Demo" tabindex="0">
<canvas class="cd__cv" id="cdCv" width="424" height="180"></canvas>
</div>
<div class="cd__bar">
<span class="cd__meta">focal distance <b class="cd__val" id="cdVal">1.00</b> · shallow depth of field</span>
<span class="cd__meta cd__meta--dim">createRadialGradient · ImageData · requestAnimationFrame</span>
</div>
</div>
</main>@use "../../../../site/static/demo-tokens" as *;
// 매크로 사진 씬(09). CSS 애니메이션·@keyframes 를 아예 두지 않는다 —
// 움직임은 전부 캔버스 rAF 루프(DLA 성장 → 표면 재배열 + 필름 그레인 + 흐르는 보케)가 만든다.
// 무대는 스튜디오 블랙. 중앙 키 라이트 아래 결정이 얕은 심도(선명 코어·흐린 가지)로 뜬다.
$duration: $dur-loop;
$easing: $ease-out;
$color: $subject-lilac;
@include stage($stage-ink);
// ── 편 공통 파스텔 팔레트(BD26: vivid 순색 없음 — 전부 파스텔이거나 어스름 무채색) ──
$flake-ink: #0d0f16; // 스튜디오 블랙 무대
$flake-lamp: #efe3ff; // 키 라이트 색(연한 라벤더 화이트)
$flake-core: #f2f5fb; // 결정 코어 — 서리 화이트
$flake-lilac: #dbd6eb; // 결정 편광 라일락
$flake-mint: #a2d8c4; // 결정 편광 민트
$flake-pink: #eeb8cf; // 결정 편광 핑크
$flake-node: #d0d4e0; // 안개색 글자·테두리
.cd {
// 렌더러가 읽는 색 — JS 는 getComputedStyle 로 --flake-* 를 받아 쓴다
--flake-ink: #{$flake-ink};
--flake-lamp: #{$flake-lamp};
--flake-core: #{$flake-core};
--flake-lilac: #{$flake-lilac};
--flake-mint: #{$flake-mint};
--flake-pink: #{$flake-pink};
--flake-node: #{$flake-node};
display: flex; flex-direction: column; gap: $sp-2;
width: 100%; max-width: 424px;
}
.cd__hint {
display: flex; align-items: center; gap: $sp-1; margin: 0;
font-weight: 700; font-size: clamp(10px, 2.8vw, 12px); line-height: 1.35;
color: $flake-node; // 잉크 무대 위 — 안개색 글자(대비 10.6:1)
}
.cd__ico { width: 16px; height: 16px; flex: 0 0 auto; color: $flake-pink; }
.cd__field {
position: relative; height: 180px;
border-radius: $r-card; overflow: hidden;
background: $flake-ink;
box-shadow: inset 0 0 0 1px rgba($flake-node, .18);
}
.cd__field:focus-visible { outline: 2px solid $flake-pink; outline-offset: 2px; }
.cd__cv { display: block; width: 100%; height: 100%; }
.cd__bar { display: flex; align-items: baseline; justify-content: space-between; gap: $sp-2; }
.cd__meta { font-size: 10px; font-weight: 500; color: rgba($flake-node, .78); }
.cd__val { color: $flake-mint; font-weight: 700; } // 잉크 위 민트 라벨(대비 9.6:1)
.cd__meta--dim { font-size: 10px; }
@media (max-width: 340px) {
.cd { gap: $sp-1; }
.cd__field { height: 100px; }
.cd__meta--dim { display: none; }
}
// reduce — rAF 를 돌리지 않고 결정이 다 자란 한 장만 남는다(JS 가 is-still 부착).
@media (prefers-reduced-motion: reduce) {
.cd.is-still .cd__field { cursor: default !important; }
}html, body {
margin: 0;
overflow: hidden;
}
.stage {
box-sizing: border-box;
min-height: 100vh;
display: grid;
place-items: center;
margin: 0;
background: #17141a;
font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
padding: clamp(8px, 4vw, 24px);
}
.cd {
--flake-ink: #0d0f16;
--flake-lamp: #efe3ff;
--flake-core: #f2f5fb;
--flake-lilac: #dbd6eb;
--flake-mint: #a2d8c4;
--flake-pink: #eeb8cf;
--flake-node: #d0d4e0;
display: flex;
flex-direction: column;
gap: 8px;
width: 100%;
max-width: 424px;
}
.cd__hint {
display: flex;
align-items: center;
gap: 4px;
margin: 0;
font-weight: 700;
font-size: clamp(10px, 2.8vw, 12px);
line-height: 1.35;
color: #d0d4e0;
}
.cd__ico {
width: 16px;
height: 16px;
flex: 0 0 auto;
color: #eeb8cf;
}
.cd__field {
position: relative;
height: 180px;
border-radius: 16px;
overflow: hidden;
background: #0d0f16;
box-shadow: inset 0 0 0 1px rgba(208, 212, 224, 0.18);
}
.cd__field:focus-visible {
outline: 2px solid #eeb8cf;
outline-offset: 2px;
}
.cd__cv {
display: block;
width: 100%;
height: 100%;
}
.cd__bar {
display: flex;
align-items: baseline;
justify-content: space-between;
gap: 8px;
}
.cd__meta {
font-size: 10px;
font-weight: 500;
color: rgba(208, 212, 224, 0.78);
}
.cd__val {
color: #a2d8c4;
font-weight: 700;
}
.cd__meta--dim {
font-size: 10px;
}
@media (max-width: 340px) {
.cd {
gap: 4px;
}
.cd__field {
height: 100px;
}
.cd__meta--dim {
display: none;
}
}
@media (prefers-reduced-motion: reduce) {
.cd.is-still .cd__field {
cursor: default !important;
}
}// 매크로 사진 씬(09). DLA 로 결정 하나를 크게 자라게 하고, 촬영 스튜디오처럼 연출한다.
// ① 중앙 radial gradient 키 라이트(현미경 광원) ② 미세 필름 그레인(매 프레임 새로운 노이즈 —
// 어두운 배경이 정적으로 죽지 않게 한다) ③ 결정 본체(grid cells ImageData, 촛점면 안쪽은 선명하게
// 바깥 가지는 DOF 만큼 뿌옇게 — 얕은 심도) ④ 잔광 줄기(라이트에서 비스듬히 흐르는 반짝 먼지)
// ⑤ 결정 주위 부유 입자(포어그라운드 보케 — 크고 흐리게).
// 결정도 멈추지 않는다: 성장이 다 차면 표면이 슬금슬금 재배열되며 결이 계속 꿈틀한다.
(function () {
// ── 변형 상수 블록 — 아래 값 하나만 바꿔 변형을 만든다 ──
var STICKS_PER_FRAME = 160; // 한 프레임에 붙는 입자 — 2초 안에 결정이 화면을 채우는 타임랩스 속도
var RMAX = 40; // 결정 반경(셀) — 화면의 절반 이상을 차지는 큰 결정
var DOF_CELLS = 26; // 초점면 깊이(셀) — 이 안은 선명, 바깥은 뿌옇다
var RESHUFFLE_RATE = 1.6; // 성장 완료 후 프레임당 표면 재배열 시도(성김) — 결이 꿈틀한다
// ────────────────────────────────────────────────
var root = document.getElementById('cdRoot');
var field = document.getElementById('cdField');
var cv = document.getElementById('cdCv');
var ctx = cv.getContext('2d');
var valOut = document.getElementById('cdVal');
var W = cv.width, H = cv.height; // 내부 424×180 고정
var CELL = 2, GW = W / CELL, GH = H / CELL;
var CX = (GW / 2) | 0, CY = ((GH / 2) | 0) - 4;
// 시드 고정 PRNG — mulberry32
var prngState = 0x31909d >>> 0;
function rand() {
prngState = (prngState + 0x6D2B79F5) >>> 0;
var t = prngState;
t = Math.imul(t ^ (t >>> 15), t | 1);
t ^= t + Math.imul(t ^ (t >>> 7), t | 61);
return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
}
// 색은 scss 의 --flake-* 에서 getComputedStyle 로
var css = getComputedStyle(root);
function tokRGB(name) {
var s = css.getPropertyValue(name).trim();
var hx = s.length === 4
? s.charAt(1) + s.charAt(1) + s.charAt(2) + s.charAt(2) + s.charAt(3) + s.charAt(3)
: s.slice(1);
return [parseInt(hx.slice(0, 2), 16), parseInt(hx.slice(2, 4), 16), parseInt(hx.slice(4, 6), 16)];
}
var C_INK = tokRGB('--flake-ink');
var C_LAMP = tokRGB('--flake-lamp');
var C_CORE = tokRGB('--flake-core');
var C_LILAC = tokRGB('--flake-lilac');
var C_MINT = tokRGB('--flake-mint');
var C_PINK = tokRGB('--flake-pink');
function rgba(c, a) { return 'rgba(' + c[0] + ',' + c[1] + ',' + c[2] + ',' + a + ')'; }
// ── grid cells 상태 ──
var frozen = new Uint8Array(GW * GH);
var tStick = new Float32Array(GW * GH); tStick.fill(-1);
var distC = new Float32Array(GW * GH); // 중심 거리(초점 심도 계산용) — 캐시
for (var yy = 0; yy < GH; yy++) for (var xx = 0; xx < GW; xx++) distC[yy * GW + xx] = Math.hypot(xx - CX, yy - CY);
var NX_EVEN = [1, -1, 0, -1, 0, -1], NY_EVEN = [0, 0, -1, -1, 1, 1];
var NX_ODD = [1, -1, 0, 1, 0, 1], NY_ODD = [0, 0, -1, -1, 1, 1];
function idx(x, y) { return y * GW + x; }
function inside(x, y) { return x >= 0 && x < GW && y >= 0 && y < GH; }
function nbX(y) { return (y & 1) ? NX_ODD : NX_EVEN; }
function nbY(y) { return (y & 1) ? NY_ODD : NY_EVEN; }
function frozenNb(x, y) {
var nx = nbX(y), ny = nbY(y), n = 0;
for (var k = 0; k < 6; k++) {
var ax = x + nx[k], ay = y + ny[k];
if (inside(ax, ay) && frozen[idx(ax, ay)]) n++;
}
return n;
}
function stick(x, y, now) { frozen[idx(x, y)] = 1; tStick[idx(x, y)] = now; }
// ── DLA 성장 — 팁 바이어스로 가지가 뻗는 큰 결정 ──
var maxR = 2, grown = false, grownAt = 0;
function aggregate(now, budget) {
var stuck = 0, attempts = 0;
while (stuck < budget && attempts < budget * 9) {
attempts++;
var ang = rand() * Math.PI * 2;
var rr = maxR + 6 + rand() * 16;
var x = Math.round(CX + Math.cos(ang) * rr);
var y = Math.round(CY + Math.sin(ang) * rr * 0.95);
var steps = 0;
while (steps < 460) {
steps++;
var dir = (rand() * 6) | 0;
var bx = nbX(y), by = nbY(y);
x += bx[dir]; y += by[dir];
if (!inside(x, y)) break;
if (frozen[idx(x, y)]) { x -= bx[dir]; y -= by[dir]; continue; }
var n = frozenNb(x, y);
if (n > 0) {
var p = n === 1 ? 1 : n === 2 ? 0.5 : 0.13;
var dist = distC[idx(x, y)];
p *= 0.35 + 0.65 * Math.min(1, dist / (maxR + 4));
if (dist < RMAX && rand() < p) {
stick(x, y, now); stuck++;
if (dist > maxR) maxR = dist;
break;
}
}
}
}
if (maxR >= RMAX - 1.5) { grown = true; grownAt = now; }
}
// ── 재배열 — 완성된 결정의 표면이 느리게 꿈틀(녹았다 붙는 미세 순환) ──
function reshuffle(now) {
for (var i = 0; i < RESHUFFLE_RATE * 10; i++) {
var x = (rand() * GW) | 0, y = (rand() * GH) | 0;
var id = idx(x, y);
if (!frozen[id]) continue;
var n = frozenNb(x, y);
if (n >= 5 || n === 0) continue; // 매립·고립 셀은 그대로
if (distC[id] < maxR * 0.55) continue; // 코어는 안정 — 가장자리만
if (rand() < 0.35) { frozen[id] = 0; } // 떼고
// 그 자리 근처에 다시 붙여 결이 미세하게 밀린다
var nx2 = nbX(y), ny2 = nbY(y);
var k = (rand() * 6) | 0;
var ax = x + nx2[k], ay = y + ny2[k];
if (inside(ax, ay) && !frozen[idx(ax, ay)] && frozenNb(ax, ay) > 0) stick(ax, ay, now);
}
}
// ── grid cells → ImageData(선명 레이어) + 블러 레이어(초점 밖 가지) ──
var sharpCv = document.createElement('canvas'); sharpCv.width = GW; sharpCv.height = GH;
var stx = sharpCv.getContext('2d');
var softCv = document.createElement('canvas'); softCv.width = GW; softCv.height = GH;
var ftx = softCv.getContext('2d');
var imgS = stx.createImageData(GW, GH), pxS = imgS.data;
var imgF = ftx.createImageData(GW, GH), pxF = imgF.data;
function repaintGrids(now) {
for (var y = 0; y < GH; y++) {
for (var x = 0; x < GW; x++) {
var id = y * GW + x;
var o = id * 4;
if (!frozen[id]) { pxS[o + 3] = 0; pxF[o + 3] = 0; continue; }
var age = now - tStick[id];
var k = Math.min(1, age / 850);
// 결정 축 방향에 따른 은은한 색 분산 — 현미경 편광 느낌의 파스텔
var ang = Math.atan2(y - CY, x - CX);
var tint = (ang > -0.5 && ang <= 0.5) || (ang > Math.PI - 0.5 || ang <= -Math.PI + 0.5) ? C_LILAC
: ang > 0.5 && ang <= 2.1 ? C_MINT : C_PINK;
var lift = frozenNb(x, y) <= 2 ? 24 : 0;
var R = Math.min(255, C_CORE[0] + (tint[0] - C_CORE[0]) * k * 0.55 + lift);
var G = Math.min(255, C_CORE[1] + (tint[1] - C_CORE[1]) * k * 0.55 + lift);
var B = Math.min(255, C_CORE[2] + (tint[2] - C_CORE[2]) * k * 0.55 + lift);
pxS[o] = R; pxS[o + 1] = G; pxS[o + 2] = B; pxS[o + 3] = 255;
// 초점면 안쪽 = 선명 레이어에, 바깥 = 소프트 레이어로 나눠 싣는다
var dof = distC[id] <= DOF_CELLS;
if (dof) { pxF[o + 3] = 0; }
else {
pxF[o] = R; pxF[o + 1] = G; pxF[o + 2] = B; pxF[o + 3] = 255;
pxS[o + 3] = 0;
}
}
}
stx.putImageData(imgS, 0, 0);
ftx.putImageData(imgF, 0, 0);
}
// ── 배경 — 키 라이트 + 숨쉬는 림 + 필름 그레인 ──
var grainCv = document.createElement('canvas'); grainCv.width = W; grainCv.height = H;
var gtx2 = grainCv.getContext('2d');
var gImg = gtx2.createImageData(W, H), gPx = gImg.data;
function repaintGrain() {
// 매 프레임 새로운 미세 노이즈 + 산발적 핫픽셀(센서 반응) — 어두운 면이 정적으로 죽지 않는다
for (var i = 0; i < gPx.length; i += 4) {
var v = 10 + (rand() * 34) | 0;
var hot = rand() < 0.0022 ? 150 + (rand() * 90 | 0) : 0;
gPx[i] = Math.min(255, v + hot); gPx[i + 1] = Math.min(255, v + hot); gPx[i + 2] = Math.min(255, v + 5 + hot);
gPx[i + 3] = 22 + (hot ? 60 : 0);
}
gtx2.putImageData(gImg, 0, 0);
}
// ── 잔광 줄기 — 라이트에서 비스듬히 흐르는 반짝 먼지(부유 입자) ──
var motes = [];
var MOTE_COLS = [C_CORE, C_LILAC, C_MINT, C_PINK];
function initMotes() {
for (var i = 0; i < 78; i++) {
motes.push({
x: rand() * W, y: rand() * H,
vx: 0.12 + rand() * 0.5, vy: -0.05 - rand() * 0.16,
r: 0.7 + rand() * 1.8, ph: rand() * Math.PI * 2,
col: MOTE_COLS[(rand() * MOTE_COLS.length) | 0]
});
}
}
function stepMotes(now) {
for (var i = 0; i < motes.length; i++) {
var mo = motes[i];
mo.x += mo.vx * (0.7 + 0.3 * Math.sin(now / 900 + mo.ph));
mo.y += mo.vy;
if (mo.x > W + 6) { mo.x = -6; mo.y = rand() * H; }
if (mo.y < -6) { mo.y = H + 6; mo.x = rand() * W * 0.6; }
}
}
// ── 합성 ──
function draw(now) {
// 1. 무대 — 잉크 바탕 + 중앙 키 라이트(radial) + 숨쉬는 림 라이트
ctx.globalCompositeOperation = 'source-over';
ctx.globalAlpha = 1; ctx.filter = 'none';
ctx.fillStyle = rgba(C_INK, 1);
ctx.fillRect(0, 0, W, H);
var key = ctx.createRadialGradient(CX * CELL, CY * CELL, 0, CX * CELL, CY * CELL, 240);
key.addColorStop(0, rgba(C_LAMP, 0.24 + 0.09 * Math.sin(now / 760)));
key.addColorStop(0.55, rgba(C_LILAC, 0.09 + 0.05 * Math.sin(now / 760)));
key.addColorStop(1, rgba(C_LILAC, 0));
ctx.fillStyle = key; ctx.fillRect(0, 0, W, H);
var rimX = W * (0.5 + 0.34 * Math.sin(now / 2900));
var rim = ctx.createRadialGradient(rimX, -30, 0, rimX, -30, 220);
rim.addColorStop(0, rgba(C_MINT, 0.09 + 0.08 * Math.sin(now / 1250 + 1.2)));
rim.addColorStop(1, rgba(C_MINT, 0));
ctx.fillStyle = rim; ctx.fillRect(0, 0, W, H);
// 두 번째 워시 — 반대편에서 도는 핑크 안개(필름의 온도 분산)
var wx2 = W * (0.5 - 0.34 * Math.sin(now / 3400));
var wash = ctx.createRadialGradient(wx2, H + 20, 0, wx2, H + 20, 200);
wash.addColorStop(0, rgba(C_PINK, 0.07 + 0.07 * Math.sin(now / 1000 + 2.6)));
wash.addColorStop(1, rgba(C_PINK, 0));
ctx.fillStyle = wash; ctx.fillRect(0, 0, W, H);
// 2. 필름 그레인 — 매 프레임 새 노이즈
repaintGrain();
ctx.globalAlpha = 0.9;
ctx.drawImage(grainCv, 0, 0);
ctx.globalAlpha = 1;
// 3. 결정 광륜 — 전체 격자를 뿌옇게(할로)
ctx.globalCompositeOperation = 'lighter';
ctx.filter = 'blur(7px)';
ctx.globalAlpha = 0.30 + 0.07 * Math.sin(now / 880);
ctx.imageSmoothingEnabled = true;
ctx.drawImage(sharpCv, 0, 0, W, H);
ctx.drawImage(softCv, 0, 0, W, H);
// 4. 초점면 바깥 가지 — 소프트 레이어(얕은 심도)
ctx.filter = 'blur(2.6px)';
ctx.globalAlpha = 0.9;
ctx.drawImage(softCv, 0, 0, W, H);
// 5. 결정 본체 — 초점면 안쪽 선명 픽셀
ctx.filter = 'none'; ctx.globalAlpha = 1;
ctx.globalCompositeOperation = 'source-over';
ctx.imageSmoothingEnabled = false;
ctx.drawImage(sharpCv, 0, 0, W, H);
// 6. 잔광 줄기 + 부유 입자 — 흐르는 보케
ctx.globalCompositeOperation = 'lighter';
for (var i = 0; i < motes.length; i++) {
var mo = motes[i];
var tw = 0.45 + 0.55 * Math.sin(now / 260 + mo.ph * 3);
var a = (mo.r > 1.6 ? 0.10 : 0.30) * tw;
if (mo.r > 1.6) {
var g = ctx.createRadialGradient(mo.x, mo.y, 0, mo.x, mo.y, mo.r * 4);
g.addColorStop(0, rgba(mo.col, a));
g.addColorStop(1, rgba(mo.col, 0));
ctx.fillStyle = g;
ctx.fillRect(mo.x - mo.r * 4, mo.y - mo.r * 4, mo.r * 8, mo.r * 8);
} else {
ctx.fillStyle = rgba(mo.col, a);
ctx.beginPath();
ctx.arc(mo.x, mo.y, mo.r, 0, Math.PI * 2);
ctx.fill();
}
}
// 7. 비네트 — 매크로 렌즈의 어두운 가장자리. 살짝 숨쉬게 해서 테두리도 죽지 않게
ctx.globalCompositeOperation = 'source-over';
var vg = ctx.createRadialGradient(W / 2, H / 2, 95, W / 2, H / 2, 250);
vg.addColorStop(0, rgba(C_INK, 0));
vg.addColorStop(1, rgba(C_INK, 0.50 + 0.05 * Math.sin(now / 1500)));
ctx.fillStyle = vg;
ctx.fillRect(0, 0, W, H);
}
var t0 = -1;
var dofT = -1;
function frame(nowRaw) {
if (t0 < 0) t0 = nowRaw;
var now = nowRaw - t0;
if (!grown) aggregate(now, STICKS_PER_FRAME);
else reshuffle(now);
stepMotes(now);
repaintGrids(now);
draw(now);
// focal distance 라벨 — 미세하게 흔들리는 랙킹(촛점 당김)
if (now - dofT > 120) { dofT = now; valOut.textContent = (0.96 + 0.08 * Math.abs(Math.sin(now / 1700))).toFixed(2); }
requestAnimationFrame(frame);
}
var reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
initMotes();
stick(CX, CY, -9000);
var nx0 = nbX(CY), ny0 = nbY(CY);
for (var k0 = 0; k0 < 6; k0++) {
var ax0 = CX + nx0[k0], ay0 = CY + ny0[k0];
if (inside(ax0, ay0)) stick(ax0, ay0, -9000);
}
if (reduce) {
aggregate(0, 4000); // 다 자란 한 장
repaintGrids(2000);
draw(2000);
root.classList.add('is-still');
} else {
requestAnimationFrame(frame);
}
})();// MacroPhotoScene — vanilla 판(run/319/demo/09-snowflake-macro-photo-scene/index.html) 의 React 포트.
// 검은 스튜디오 무대에 중앙 radial gradient 키 라이트를 깔고 DLA 결정을 크게 키운다.
// 초점면 안쪽(선명 레이어)과 바깥(소프트 레이어)을 나눠 얕은 심도를 만들고,
// 필름 그레인(매 프레임 새 노이즈)과 흐르는 보케 입자로 배경이 계속 살아 움직인다.
import { useEffect, useRef } from "react";
import type { CSSProperties } from "react";
import styles from "./MacroPhotoScene.module.scss";
export type MacroPhotoSceneProps = {
duration?: string;
easing?: string;
color?: string;
sticksPerFrame?: number; // 한 프레임에 붙는 입자
rMax?: number; // 결정 반경(셀)
dofCells?: number; // 초점면 깊이(셀) — 이 안은 선명, 바깥은 뿌옇다
};
type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };
type Box<T> = { current: T };
type RGB = [number, number, number];
type Mote = { x: number; y: number; vx: number; vy: number; r: number; ph: number; col: RGB };
type Colors = { ink: RGB; lamp: RGB; core: RGB; lilac: RGB; mint: RGB; pink: RGB };
const FIELD_LABEL = "매크로 사진 결정 씬 실험판";
const RESHUFFLE_RATE = 0.9;
function makePRNG(seed: number): () => number {
let s = seed >>> 0;
return function () {
s = (s + 0x6d2b79f5) >>> 0;
let t = s;
t = Math.imul(t ^ (t >>> 15), t | 1);
t ^= t + Math.imul(t ^ (t >>> 7), t | 61);
return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
};
}
const NX_EVEN = [1, -1, 0, -1, 0, -1], NY_EVEN = [0, 0, -1, -1, 1, 1];
const NX_ODD = [1, -1, 0, 1, 0, 1], NY_ODD = [0, 0, -1, -1, 1, 1];
export default function MacroPhotoScene({
duration = "2s",
easing = "ease-out",
color = "#b8a7ea",
sticksPerFrame = 26,
rMax = 40,
dofCells = 26,
}: MacroPhotoSceneProps) {
const rootRef = useRef<HTMLDivElement | null>(null);
const fieldRef = useRef<HTMLDivElement | null>(null);
const cvRef = useRef<HTMLCanvasElement | null>(null);
const ctxRef = useRef<CanvasRenderingContext2D | null>(null);
const colRef = useRef<Colors | null>(null);
const randRef = useRef(makePRNG(0x31909d)) as Box<() => number>;
const rafRef = useRef(0) as Box<number>;
const W = 424, H = 180, CELL = 2, GW = W / CELL, GH = H / CELL;
const CX = Math.floor(GW / 2), CY = Math.floor(GH / 2) - 4;
const frozenRef = useRef<Uint8Array>(new Uint8Array(GW * GH)) as Box<Uint8Array>;
const tStickRef = useRef<Float32Array>(new Float32Array(GW * GH)) as Box<Float32Array>;
const distCRef = useRef<Float32Array>(new Float32Array(GW * GH)) as Box<Float32Array>;
const motesRef = useRef<Mote[]>([]) as Box<Mote[]>;
const maxRRef = useRef(2) as Box<number>;
const grownRef = useRef(false) as Box<boolean>;
const sharpCvRef = useRef<HTMLCanvasElement | null>(null);
const softCvRef = useRef<HTMLCanvasElement | null>(null);
const grainCvRef = useRef<HTMLCanvasElement | null>(null);
function idx(x: number, y: number): number { return y * GW + x; }
function inside(x: number, y: number): boolean { return x >= 0 && x < GW && y >= 0 && y < GH; }
function nbX(y: number): number[] { return (y & 1) ? NX_ODD : NX_EVEN; }
function nbY(y: number): number[] { return (y & 1) ? NY_ODD : NY_EVEN; }
function frozenNb(x: number, y: number): number {
const frozen = frozenRef.current;
const nx = nbX(y), ny = nbY(y);
let n = 0;
for (let k = 0; k < 6; k++) {
const ax = x + nx[k], ay = y + ny[k];
if (inside(ax, ay) && frozen[idx(ax, ay)]) n++;
}
return n;
}
function stick(x: number, y: number, now: number): void {
frozenRef.current[idx(x, y)] = 1;
tStickRef.current[idx(x, y)] = now;
}
function aggregate(now: number, budget: number): void {
const rand = randRef.current, frozen = frozenRef.current, distC = distCRef.current;
let stuck = 0, attempts = 0;
while (stuck < budget && attempts < budget * 9) {
attempts++;
const ang = rand() * Math.PI * 2;
const rr = maxRRef.current + 6 + rand() * 16;
let x = Math.round(CX + Math.cos(ang) * rr);
let y = Math.round(CY + Math.sin(ang) * rr * 0.95);
let steps = 0;
while (steps < 460) {
steps++;
const dir = (rand() * 6) | 0;
const bx = nbX(y), by = nbY(y);
x += bx[dir]; y += by[dir];
if (!inside(x, y)) break;
if (frozen[idx(x, y)]) { x -= bx[dir]; y -= by[dir]; continue; }
const n = frozenNb(x, y);
if (n > 0) {
let p = n === 1 ? 1 : n === 2 ? 0.5 : 0.13;
const dist = distC[idx(x, y)];
p *= 0.35 + 0.65 * Math.min(1, dist / (maxRRef.current + 4));
if (dist < rMax && rand() < p) {
stick(x, y, now); stuck++;
if (dist > maxRRef.current) maxRRef.current = dist;
break;
}
}
}
}
if (maxRRef.current >= rMax - 1.5) grownRef.current = true;
}
function reshuffle(now: number): void {
const rand = randRef.current, frozen = frozenRef.current, distC = distCRef.current;
for (let i = 0; i < RESHUFFLE_RATE * 10; i++) {
const x = (rand() * GW) | 0, y = (rand() * GH) | 0;
const id = idx(x, y);
if (!frozen[id]) continue;
const n = frozenNb(x, y);
if (n >= 5 || n === 0) continue;
if (distC[id] < maxRRef.current * 0.55) continue;
if (rand() < 0.35) frozen[id] = 0;
const nx2 = nbX(y), ny2 = nbY(y);
const k = (rand() * 6) | 0;
const ax = x + nx2[k], ay = y + ny2[k];
if (inside(ax, ay) && !frozen[idx(ax, ay)] && frozenNb(ax, ay) > 0) stick(ax, ay, now);
}
}
function rgba(c: RGB, a: number): string { return "rgba(" + c[0] + "," + c[1] + "," + c[2] + "," + a + ")"; }
function repaintGrids(now: number): void {
const sharpCv = sharpCvRef.current, softCv = softCvRef.current, col = colRef.current;
if (!sharpCv || !softCv || !col) return;
const stx = sharpCv.getContext("2d"), ftx = softCv.getContext("2d");
if (!stx || !ftx) return;
const frozen = frozenRef.current, tStick = tStickRef.current, distC = distCRef.current;
const imgS = stx.createImageData(GW, GH), pxS = imgS.data;
const imgF = ftx.createImageData(GW, GH), pxF = imgF.data;
for (let y = 0; y < GH; y++) {
for (let x = 0; x < GW; x++) {
const id = y * GW + x, o = id * 4;
if (!frozen[id]) { pxS[o + 3] = 0; pxF[o + 3] = 0; continue; }
const age = now - tStick[id];
const k = Math.min(1, age / 850);
const ang = Math.atan2(y - CY, x - CX);
const tint: RGB = (ang > -0.5 && ang <= 0.5) || (ang > Math.PI - 0.5 || ang <= -Math.PI + 0.5) ? col.lilac
: ang > 0.5 && ang <= 2.1 ? col.mint : col.pink;
const lift = frozenNb(x, y) <= 2 ? 24 : 0;
const R = Math.min(255, col.core[0] + (tint[0] - col.core[0]) * k * 0.55 + lift);
const G = Math.min(255, col.core[1] + (tint[1] - col.core[1]) * k * 0.55 + lift);
const B = Math.min(255, col.core[2] + (tint[2] - col.core[2]) * k * 0.55 + lift);
pxS[o] = R; pxS[o + 1] = G; pxS[o + 2] = B; pxS[o + 3] = 255;
if (distC[id] <= dofCells) { pxF[o + 3] = 0; }
else {
pxF[o] = R; pxF[o + 1] = G; pxF[o + 2] = B; pxF[o + 3] = 255;
pxS[o + 3] = 0;
}
}
}
stx.putImageData(imgS, 0, 0);
ftx.putImageData(imgF, 0, 0);
}
function repaintGrain(): void {
const grainCv = grainCvRef.current;
if (!grainCv) return;
const gtx = grainCv.getContext("2d");
if (!gtx) return;
const rand = randRef.current;
const gImg = gtx.createImageData(W, H), gPx = gImg.data;
for (let i = 0; i < gPx.length; i += 4) {
const v = 10 + ((rand() * 26) | 0);
gPx[i] = v; gPx[i + 1] = v; gPx[i + 2] = v + 4; gPx[i + 3] = 14;
}
gtx.putImageData(gImg, 0, 0);
}
function initMotes(): void {
const col = colRef.current;
if (!col) return;
const rand = randRef.current;
const cols: RGB[] = [col.core, col.lilac, col.mint, col.pink];
const motes = motesRef.current;
for (let i = 0; i < 46; i++) {
motes.push({
x: rand() * W, y: rand() * H,
vx: 0.12 + rand() * 0.5, vy: -0.05 - rand() * 0.16,
r: 0.7 + rand() * 1.5, ph: rand() * Math.PI * 2,
col: cols[(rand() * cols.length) | 0],
});
}
}
function stepMotes(now: number): void {
const motes = motesRef.current;
for (let i = 0; i < motes.length; i++) {
const mo = motes[i];
mo.x += mo.vx * (0.7 + 0.3 * Math.sin(now / 900 + mo.ph));
mo.y += mo.vy;
if (mo.x > W + 6) { mo.x = -6; mo.y = Math.random() * H; }
if (mo.y < -6) { mo.y = H + 6; mo.x = Math.random() * W * 0.6; }
}
}
function draw(now: number): void {
const ctx = ctxRef.current, col = colRef.current;
const sharpCv = sharpCvRef.current, softCv = softCvRef.current, grainCv = grainCvRef.current;
if (!ctx || !col || !sharpCv || !softCv || !grainCv) return;
ctx.globalCompositeOperation = "source-over";
ctx.globalAlpha = 1; ctx.filter = "none";
ctx.fillStyle = rgba(col.ink, 1);
ctx.fillRect(0, 0, W, H);
const key = ctx.createRadialGradient(CX * CELL, CY * CELL, 0, CX * CELL, CY * CELL, 210);
key.addColorStop(0, rgba(col.lamp, 0.20 + 0.035 * Math.sin(now / 760)));
key.addColorStop(0.55, rgba(col.lilac, 0.05));
key.addColorStop(1, rgba(col.lilac, 0));
ctx.fillStyle = key; ctx.fillRect(0, 0, W, H);
const rimX = W * (0.5 + 0.34 * Math.sin(now / 2900));
const rim = ctx.createRadialGradient(rimX, -30, 0, rimX, -30, 190);
rim.addColorStop(0, rgba(col.mint, 0.06 + 0.035 * Math.sin(now / 1250 + 1.2)));
rim.addColorStop(1, rgba(col.mint, 0));
ctx.fillStyle = rim; ctx.fillRect(0, 0, W, H);
repaintGrain();
ctx.globalAlpha = 0.9;
ctx.drawImage(grainCv, 0, 0);
ctx.globalAlpha = 1;
ctx.globalCompositeOperation = "lighter";
ctx.filter = "blur(7px)";
ctx.globalAlpha = 0.30 + 0.07 * Math.sin(now / 880);
ctx.imageSmoothingEnabled = true;
ctx.drawImage(sharpCv, 0, 0, W, H);
ctx.drawImage(softCv, 0, 0, W, H);
ctx.filter = "blur(2.6px)";
ctx.globalAlpha = 0.9;
ctx.drawImage(softCv, 0, 0, W, H);
ctx.filter = "none"; ctx.globalAlpha = 1;
ctx.globalCompositeOperation = "source-over";
ctx.imageSmoothingEnabled = false;
ctx.drawImage(sharpCv, 0, 0, W, H);
ctx.globalCompositeOperation = "lighter";
const motes = motesRef.current;
for (let i = 0; i < motes.length; i++) {
const mo = motes[i];
const tw = 0.45 + 0.55 * Math.sin(now / 260 + mo.ph * 3);
const a = (mo.r > 1.6 ? 0.10 : 0.30) * tw;
if (mo.r > 1.6) {
const g = ctx.createRadialGradient(mo.x, mo.y, 0, mo.x, mo.y, mo.r * 4);
g.addColorStop(0, rgba(mo.col, a));
g.addColorStop(1, rgba(mo.col, 0));
ctx.fillStyle = g;
ctx.fillRect(mo.x - mo.r * 4, mo.y - mo.r * 4, mo.r * 8, mo.r * 8);
} else {
ctx.fillStyle = rgba(mo.col, a);
ctx.beginPath();
ctx.arc(mo.x, mo.y, mo.r, 0, Math.PI * 2);
ctx.fill();
}
}
ctx.globalCompositeOperation = "source-over";
const vg = ctx.createRadialGradient(W / 2, H / 2, 95, W / 2, H / 2, 250);
vg.addColorStop(0, rgba(col.ink, 0));
vg.addColorStop(1, rgba(col.ink, 0.50 + 0.05 * Math.sin(now / 1500)));
ctx.fillStyle = vg;
ctx.fillRect(0, 0, W, H);
}
useEffect(() => {
const root = rootRef.current, cv = cvRef.current;
if (!root || !cv) return;
const ctx = cv.getContext("2d");
if (!ctx) return;
ctxRef.current = ctx;
sharpCvRef.current = document.createElement("canvas");
sharpCvRef.current.width = GW; sharpCvRef.current.height = GH;
softCvRef.current = document.createElement("canvas");
softCvRef.current.width = GW; softCvRef.current.height = GH;
grainCvRef.current = document.createElement("canvas");
grainCvRef.current.width = W; grainCvRef.current.height = H;
function tokRGB(name: string): RGB {
const s = getComputedStyle(root!).getPropertyValue(name).trim();
const hx = s.length === 4
? s.charAt(1) + s.charAt(1) + s.charAt(2) + s.charAt(2) + s.charAt(3) + s.charAt(3)
: s.slice(1);
return [parseInt(hx.slice(0, 2), 16), parseInt(hx.slice(2, 4), 16), parseInt(hx.slice(4, 6), 16)];
}
colRef.current = {
ink: tokRGB("--flake-ink"), lamp: tokRGB("--flake-lamp"), core: tokRGB("--flake-core"),
lilac: tokRGB("--flake-lilac"), mint: tokRGB("--flake-mint"), pink: tokRGB("--flake-pink"),
};
randRef.current = makePRNG(0x31909d);
frozenRef.current = new Uint8Array(GW * GH);
tStickRef.current = new Float32Array(GW * GH).fill(-1);
const distC = distCRef.current;
for (let yy = 0; yy < GH; yy++) {
for (let xx = 0; xx < GW; xx++) {
distC[yy * GW + xx] = Math.hypot(xx - CX, yy - CY);
}
}
motesRef.current = [];
maxRRef.current = 2;
grownRef.current = false;
initMotes();
stick(CX, CY, -9000);
const nx0 = nbX(CY), ny0 = nbY(CY);
for (let k0 = 0; k0 < 6; k0++) {
const ax0 = CX + nx0[k0], ay0 = CY + ny0[k0];
if (inside(ax0, ay0)) stick(ax0, ay0, -9000);
}
const reduce = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
let t0 = -1;
function frame(nowRaw: number): void {
if (t0 < 0) t0 = nowRaw;
const now = nowRaw - t0;
if (!grownRef.current) aggregate(now, sticksPerFrame);
else reshuffle(now);
stepMotes(now);
repaintGrids(now);
draw(now);
rafRef.current = requestAnimationFrame(frame);
}
if (reduce) {
aggregate(0, 4000);
repaintGrids(2000);
draw(2000);
} else {
rafRef.current = requestAnimationFrame(frame);
}
return () => cancelAnimationFrame(rafRef.current);
// eslint-disable-next-line react-hooks/exhaustive-deps
}, [sticksPerFrame, rMax, dofCells]);
const vars: Vars = { "--duration": duration, "--easing": easing, "--color": color };
return (
<main className={styles.stage}>
<div className={styles.cd} ref={rootRef} style={vars}>
<p className={styles.hint}>
<svg className={styles.ico} viewBox="0 0 256 256" aria-hidden="true"><g fill="none" stroke="currentColor" strokeWidth={14} strokeLinecap="round"><path d="M128 26v204" /><path d="M43 74l170 128" /><path d="M213 74L43 202" /><path d="M106 40l22 18 22-18" /><path d="M106 216l22-18 22 18" /><path d="M40 106l18 22-18 22" /><path d="M216 106l-18 22 18 22" /></g></svg>
<span>검은 무대에 중앙 조명을 깔고 결정을 크게 키우면 현미경 매크로의 한 컷이 됩니다 — 잔광 줄기와 부유 입자가 프레임을 계속 살아 움직이게 합니다</span>
</p>
<div className={styles.field} ref={fieldRef} role="application" aria-label={FIELD_LABEL} tabIndex={0}>
<canvas className={styles.cv} ref={cvRef} width={W} height={H}></canvas>
</div>
<div className={styles.bar}>
<span className={styles.meta}>초점 거리 <b className={styles.val}>1.00</b> · 얕은 심도</span>
<span className={styles.metaDim}>createRadialGradient · ImageData · requestAnimationFrame</span>
</div>
</div>
</main>
);
}09 Macro-photo scene — one flake in shallow depth of field on a dark stage — Measured area 36.536% · moving frames 23/23Original by GODRICH · SCSS and React ship in the zip · Snowflake Generator, 9 Ways (DLA, No Library)
The post this demo lives in
Snowflake Generator, 9 Ways (DLA, No Library)No library, no WebGL — repeat one moment, a wandering particle touching the crystal and sticking, and a six-fold snowfla See all demos in this post
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