04散らばった文字を順番に押すと線がつながって描かれる確認
文字を4つ、揺れる位置に置き、押す順番が合っていれば前の文字から今の文字まで線が補間で伸びる。順番が違えば、ここまでつないだ線が最初の文字まで巻き戻る。
使いどころ順番クリック確認・簡単な人確認ゲーム
GLYPH_NHIT_RJITTERLINE_LERP
<main class="stage">
<div class="cp is-demo" id="cp">
<canvas class="cp__canvas" data-role="canvas" width="480" height="300" tabindex="0" aria-label="散らばった文字を順番に押すと線がつながって描かれる確認"></canvas>
<p class="cp__status" data-role="status" aria-live="polite">デモを準備中</p>
<button class="cp__btn" data-role="btn" type="button">一時停止</button>
</div>
</main>@use "../../../../site/static/demo-tokens" as *;
@include stage($stage-ink);
.cp {
position: relative;
width: min(92vw, calc(160vh - 12.8vw));
aspect-ratio: 480 / 300;
margin: 0 auto;
border-radius: $r-card;
overflow: hidden;
box-shadow: $shadow-raised;
background: $subject-ink;
}
.cp__canvas {
display: block;
width: 100%;
height: 100%;
touch-action: none;
}
.cp__canvas:focus-visible {
outline: 2px solid rgba(255, 255, 255, .85);
outline-offset: -6px;
}
.cp__status {
position: absolute;
left: $sp-3;
top: $sp-3;
max-width: 62%;
margin: 0;
padding: $sp-1 $sp-3;
border-radius: $r-pill;
background: rgba(255, 255, 255, .85);
color: $subject-ink;
font-weight: 500;
font-size: 11px;
line-height: 1.4;
pointer-events: none;
}
.cp__btn {
position: absolute;
right: $sp-3;
bottom: $sp-3;
margin: 0;
padding: $sp-1 $sp-3;
border: 0;
border-radius: $r-pill;
background: rgba(255, 255, 255, .85);
color: $subject-ink;
font-family: inherit;
font-weight: 500;
font-size: 12px;
line-height: 1.4;
cursor: pointer;
}
.cp__btn:focus-visible {
outline: 2px solid #ffffff;
outline-offset: 2px;
}
@media (max-width: 340px) {
.cp__btn { font-size: 10px; padding: $sp-1 $sp-2; }
.cp__status { font-size: 10px; }
}
@media (prefers-reduced-motion: reduce) {
.cp { cursor: default; }
}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);
}
.cp {
position: relative;
width: min(92vw, 160vh - 12.8vw);
aspect-ratio: 480/300;
margin: 0 auto;
border-radius: 16px;
overflow: hidden;
box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
background: #17141a;
}
.cp__canvas {
display: block;
width: 100%;
height: 100%;
touch-action: none;
}
.cp__canvas:focus-visible {
outline: 2px solid rgba(255, 255, 255, 0.85);
outline-offset: -6px;
}
.cp__status {
position: absolute;
left: 12px;
top: 12px;
max-width: 62%;
margin: 0;
padding: 4px 12px;
border-radius: 999px;
background: rgba(255, 255, 255, 0.85);
color: #17141a;
font-weight: 500;
font-size: 11px;
line-height: 1.4;
pointer-events: none;
}
.cp__btn {
position: absolute;
right: 12px;
bottom: 12px;
margin: 0;
padding: 4px 12px;
border: 0;
border-radius: 999px;
background: rgba(255, 255, 255, 0.85);
color: #17141a;
font-family: inherit;
font-weight: 500;
font-size: 12px;
line-height: 1.4;
cursor: pointer;
}
.cp__btn:focus-visible {
outline: 2px solid #ffffff;
outline-offset: 2px;
}
@media (max-width: 340px) {
.cp__btn {
font-size: 10px;
padding: 4px 8px;
}
.cp__status {
font-size: 10px;
}
}
@media (prefers-reduced-motion: reduce) {
.cp {
cursor: default;
}
}(function () {
const root = document.getElementById("cp");
if (!root)
return;
const W = 480;
const H = 300;
const PI2 = Math.PI * 2;
const FIXED_DT = 16;
const IDLE_TICKS = 150;
const BTN_PAUSE = '一時停止';
const BTN_PLAY = '再生';
const BTN_NEXT = '次の場面';
// 파스텔 팔레트 - 어두운 판 위에 밝은 색을 얹어 명도 차로 읽힌다
const BG = [29, 26, 44];
const PANEL = [44, 40, 68];
const MINT = [126, 226, 192];
const SKY = [124, 196, 255];
const LILAC = [190, 164, 255];
const PINK = [255, 160, 190];
const PEACH = [255, 208, 168];
const CREAM = [255, 244, 224];
const CHARSET = 'ABCDEFGHJKLMNPQRSTUVWXYZabdefghmnqrt23456789';
function clamp(v, lo, hi) { return v < lo ? lo : (v > hi ? hi : v); }
function lerp(a, b, k) { return a + (b - a) * k; }
function smooth(x) { const c = clamp(x, 0, 1); return c * c * (3 - 2 * c); }
function easeOutBack(x) { const c = clamp(x, 0, 1) - 1; return 1 + c * c * (2.7 * c + 1.7); }
function rgba(c, a) {
return 'rgba(' + Math.round(c[0]) + ',' + Math.round(c[1]) + ',' + Math.round(c[2]) + ',' + clamp(a, 0, 1).toFixed(3) + ')';
}
function mix(a, b, k) {
return [lerp(a[0], b[0], k), lerp(a[1], b[1], k), lerp(a[2], b[2], k)];
}
// 시드 고정 난수 - 같은 시드면 언제나 같은 수열 (선형 합동 방식)
function lcg(seed) {
let s = seed >>> 0;
return function () {
s = (Math.imul(s, 1664525) + 1013904223) >>> 0;
return s / 4294967296;
};
}
// 정수 두 개와 시드로 0 이상 1 미만의 값을 만드는 해시 (같은 입력은 늘 같은 값)
function hash2(x, y, seed) {
let h = (Math.imul(x | 0, 374761393) + Math.imul(y | 0, 668265263) + Math.imul(seed | 0, 1442695041)) | 0;
h = Math.imul(h ^ (h >>> 13), 1274126177);
h ^= h >>> 16;
return (h >>> 0) / 4294967296;
}
// 시드로 뜻 없는 글자열을 만든다
function glyphStr(seed, n) {
const r = lcg(seed * 7919 + 13);
let s = '';
for (let i = 0; i < n; i += 1) {
s += CHARSET.charAt(Math.floor(r() * CHARSET.length));
}
return s;
}
function rrect(ctx, x, y, w, h, r) {
const rr = Math.max(0, Math.min(r, w / 2, h / 2));
ctx.beginPath();
ctx.moveTo(x + rr, y);
ctx.lineTo(x + w - rr, y);
ctx.arcTo(x + w, y, x + w, y + rr, rr);
ctx.lineTo(x + w, y + h - rr);
ctx.arcTo(x + w, y + h, x + w - rr, y + h, rr);
ctx.lineTo(x + rr, y + h);
ctx.arcTo(x, y + h, x, y + h - rr, rr);
ctx.lineTo(x, y + rr);
ctx.arcTo(x, y, x + rr, y, rr);
ctx.closePath();
}
function mount(root, make) {
const canvas = root.querySelector('[data-role="canvas"]');
const statusEl = root.querySelector('[data-role="status"]');
const btnEl = root.querySelector('[data-role="btn"]');
if (!canvas || !statusEl || !btnEl) {
return function () { return; };
}
const ctx = canvas.getContext('2d');
if (!ctx) {
return function () { return; };
}
const dpr = Math.min(window.devicePixelRatio || 1, 2);
canvas.width = Math.round(W * dpr);
canvas.height = Math.round(H * dpr);
ctx.setTransform(dpr, 0, 0, dpr, 0, 0);
const reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
const inp = { idle: 99999, focus: false, key: false };
const scene = make(inp, reduce);
let paused = false;
let rafId = 0;
let lastTs = -1;
let accMs = 0;
let lastLabel = '';
let lastLabelTick = -999;
let lastLive = 'polite';
let tickN = 0;
let clk = 0;
let wasAuto = true;
const cleaners = [];
function listen(target, type, fn) {
target.addEventListener(type, fn);
cleaners.push(function () { target.removeEventListener(type, fn); });
}
function show() {
scene.draw(ctx);
// 시연이 혼자 돌 때는 낭독을 끄고, 사람이 만지는 동안은 값이 바뀌어도 0.7초에 한 번만 갱신한다
const live = (reduce || inp.idle <= IDLE_TICKS) ? 'polite' : 'off';
if (live !== lastLive) {
lastLive = live;
statusEl.setAttribute('aria-live', live);
}
const t = scene.label();
if (t !== lastLabel && (reduce || live === 'off' || tickN - lastLabelTick >= 44)) {
lastLabel = t;
lastLabelTick = tickN;
statusEl.textContent = t;
}
}
// 고정 간격 한 틱 - 입력이 없으면 시연 스크립트가 같은 입구로 입력을 대신 넣는다
function advance() {
inp.idle += 1;
tickN += 1;
const a = inp.idle > IDLE_TICKS;
if (a && !wasAuto) {
scene.reset();
clk = 0;
}
wasAuto = a;
if (a) {
clk += 1;
scene.auto(clk);
if (clk >= scene.CYCLE) {
clk = 0;
scene.reset();
}
}
scene.step();
}
// 움직임 줄이기: 틱을 몰아서 돌린 뒤 한 번만 그린다 (중간 보간 장면은 화면에 나오지 않는다)
function settle(n) {
for (let i = 0; i < n; i += 1) {
inp.idle = 0;
tickN += 1;
scene.step();
}
show();
}
function tick(ts) {
if (lastTs < 0) {
lastTs = ts;
}
const frameDt = Math.min(ts - lastTs, 160);
lastTs = ts;
if (!paused) {
accMs += frameDt;
while (accMs >= FIXED_DT) {
advance();
accMs -= FIXED_DT;
}
show();
}
rafId = requestAnimationFrame(tick);
}
function point(e) {
const r = canvas.getBoundingClientRect();
return [clamp((e.clientX - r.left) * W / r.width, 0, W), clamp((e.clientY - r.top) * H / r.height, 0, H)];
}
btnEl.textContent = reduce ? BTN_NEXT : BTN_PAUSE;
if (reduce) {
root.classList.remove('is-demo');
for (let i = 0; i < scene.REDUCE_TICKS; i += 1) {
advance();
}
show();
}
listen(btnEl, 'click', function () {
if (reduce) {
if (scene.next) {
scene.next();
show();
return;
}
const n = Math.round(scene.CYCLE / 3);
inp.idle = 99999;
wasAuto = true;
for (let i = 0; i < n; i += 1) {
advance();
}
show();
return;
}
paused = !paused;
if (paused) {
root.classList.remove('is-demo');
}
else {
root.classList.add('is-demo');
}
btnEl.textContent = paused ? BTN_PLAY : BTN_PAUSE;
});
listen(canvas, 'focus', function () { inp.focus = true; if (reduce) {
show();
} });
listen(canvas, 'blur', function () { inp.focus = false; inp.key = false; if (reduce) {
show();
} });
listen(canvas, 'pointerdown', function (e) {
const p = point(e);
inp.idle = 0;
inp.key = false;
try {
canvas.setPointerCapture(e.pointerId);
}
catch (err) { /* 캡처가 안 되는 환경은 그냥 넘어간다 */ }
scene.down(p[0], p[1]);
if (reduce) {
settle(30);
}
});
listen(canvas, 'pointermove', function (e) {
const p = point(e);
inp.idle = 0;
inp.key = false;
scene.move(p[0], p[1]);
if (reduce) {
settle(30);
}
});
listen(canvas, 'pointerup', function (e) {
const p = point(e);
inp.idle = 0;
scene.up(p[0], p[1]);
if (reduce) {
settle(30);
}
});
listen(canvas, 'keydown', function (e) {
inp.idle = 0;
inp.key = true;
if (scene.key(e.key)) {
e.preventDefault();
}
if (reduce) {
settle(30);
}
});
if (!reduce) {
rafId = requestAnimationFrame(tick);
}
return function () {
cancelAnimationFrame(rafId);
for (let i = 0; i < cleaners.length; i += 1) {
cleaners[i]();
}
};
}
const GLYPH_N = 4; // 순서대로 눌러야 하는 글리프 수
const HIT_R = 26; // 누른 점이 글리프 중심에서 이만큼 안이면 맞춘 것
const JITTER = 6; // 글리프가 제자리에서 떨리는 폭 (px)
const LINE_LERP = 0.16; // 선 머리가 한 틱에 남은 거리의 이만큼씩 자란다
const TXT_NEXT = '次の文字 {k} / {n}';
const TXT_REWIND = '順番が違うので最初まで巻き戻す';
const TXT_DONE = '順番どおりにすべてつないだ';
// PURE-BEGIN
// 서로 minDist 이상 떨어진 글리프 자리를 시드로 뽑는다 (영역은 가로 44~436, 세로 116~268)
function placeGlyphs(seed, n, minDist) {
const r = lcg(seed * 613 + 17);
const pts = [];
let guard = 0;
while (pts.length < n && guard < 400) {
guard += 1;
const x = 44 + r() * 392;
const y = 116 + r() * 152;
let ok = true;
for (let i = 0; i < pts.length; i += 1) {
const dx = pts[i][0] - x;
const dy = pts[i][1] - y;
if (dx * dx + dy * dy < minDist * minDist) {
ok = false;
}
}
if (ok) {
pts.push([x, y]);
}
}
return pts;
}
// 0 부터 n-1 까지를 시드로 섞은 눌러야 할 순서
function clickOrder(seed, n) {
const r = lcg(seed * 211 + 5);
const a = [];
for (let i = 0; i < n; i += 1) {
a.push(i);
}
for (let i = n - 1; i > 0; i -= 1) {
const j = Math.floor(r() * (i + 1));
const t = a[i];
a[i] = a[j];
a[j] = t;
}
return a;
}
// 선 머리를 목표 쪽으로 한 걸음 보간한다
function growStep(v, lerpK) { return Math.min(1, v + (1 - v) * lerpK + 0.012); }
const make = (inp, reduce) => {
let seed = 5;
let base = [];
let chars = '';
let order = [];
let chain = [];
let seg = [];
let att = null;
let rewind = false;
let done = false;
let t = 0;
let kcur = 0;
function setup() {
base = placeGlyphs(seed, GLYPH_N, 92);
chars = glyphStr(seed + 40, GLYPH_N);
order = clickOrder(seed, GLYPH_N);
chain = [];
seg = [];
att = null;
rewind = false;
done = false;
}
setup();
function pos(i) {
const w = t * 0.08;
return [base[i][0] + JITTER * Math.sin(w + i * 2.1) + JITTER * 0.4 * Math.sin(w * 3.7 + i), base[i][1] + JITTER * Math.cos(w * 1.2 + i * 1.3) + JITTER * 0.4 * Math.cos(w * 4.1 + i * 2)];
}
function click(i) {
if (rewind || i < 0) {
return;
}
if (done) {
// 다 이은 판을 다시 누르면 새 판으로 넘어간다
seed += 1;
setup();
return;
}
const want = order[chain.length];
if (i === want) {
chain.push(i);
if (chain.length > 1) {
seg.push(0);
}
if (chain.length === GLYPH_N) {
done = true;
}
}
else if (!chain.includes(i)) {
att = { from: chain.length ? chain[chain.length - 1] : -1, to: i, t: 1 };
rewind = true;
}
}
function hit(x, y) {
let best = -1;
let bd = HIT_R * HIT_R;
for (let i = 0; i < GLYPH_N; i += 1) {
const p = pos(i);
const d = (p[0] - x) * (p[0] - x) + (p[1] - y) * (p[1] - y);
if (d <= bd) {
bd = d;
best = i;
}
}
return best;
}
function sorted() {
const idx = [];
for (let i = 0; i < GLYPH_N; i += 1) {
idx.push(i);
}
idx.sort((a, b) => base[a][0] - base[b][0]);
return idx;
}
const scene = {
CYCLE: 134,
REDUCE_TICKS: 110,
reset() { seed += 1; setup(); },
auto(clk) {
// 둘째 글리프까지 잇다가 일부러 틀려 되감기를 보이고 다시 순서대로 잇는다
if (clk === 8) {
click(order[0]);
}
if (clk === 20) {
click(order[1]);
}
if (clk === 32) {
click(order[3]);
}
if (clk === 62) {
click(order[0]);
}
if (clk === 74) {
click(order[1]);
}
if (clk === 86) {
click(order[2]);
}
if (clk === 98) {
click(order[3]);
}
},
step() {
t += 1;
if (rewind) {
// 끝 선부터 한 줄씩 되감아 처음 글리프까지 돌아간다
if (seg.length > 0) {
const k = seg.length - 1;
seg[k] -= 0.1;
if (seg[k] <= 0) {
seg.pop();
chain.pop();
}
}
else {
chain = [];
}
if (att) {
att.t -= 1 / 24;
if (att.t <= 0) {
att = null;
}
}
if (seg.length === 0 && !att) {
chain = [];
rewind = false;
}
}
else if (seg.length > 0) {
const k = seg.length - 1;
seg[k] = growStep(seg[k], LINE_LERP);
}
},
draw(ctx) {
ctx.fillStyle = rgba(BG, 1);
ctx.fillRect(0, 0, W, H);
ctx.fillStyle = rgba(PANEL, 1);
rrect(ctx, 14, 46, W - 28, 52, 14);
ctx.fill();
// 순서 안내 줄 - 눌러야 할 순서대로 글자가 늘어선다
ctx.font = 'bold 26px "Segoe UI", "Noto Sans KR", sans-serif';
ctx.textAlign = 'center';
ctx.textBaseline = 'middle';
for (let k = 0; k < GLYPH_N; k += 1) {
const cx = W / 2 + (k - (GLYPH_N - 1) / 2) * 84;
const got = k < chain.length;
ctx.fillStyle = rgba(got ? MINT : CREAM, got ? 1 : 0.9);
ctx.fillText(chars.charAt(order[k]), cx, 73);
if (k < GLYPH_N - 1) {
ctx.strokeStyle = rgba(CREAM, 0.45);
ctx.lineWidth = 2;
ctx.beginPath();
ctx.moveTo(cx + 24, 73);
ctx.lineTo(cx + 40, 73);
ctx.stroke();
}
}
// 이어진 선
ctx.lineCap = 'round';
for (let k = 0; k < seg.length; k += 1) {
const a = pos(chain[k]);
const b = pos(chain[k + 1]);
const f = clamp(seg[k], 0, 1);
ctx.strokeStyle = rgba(MINT, 0.9);
ctx.lineWidth = 5;
ctx.beginPath();
ctx.moveTo(a[0], a[1]);
ctx.lineTo(lerp(a[0], b[0], f), lerp(a[1], b[1], f));
ctx.stroke();
}
if (att && att.from >= 0) {
const a = pos(att.from);
const b = pos(att.to);
const f = Math.sin(Math.PI * (1 - att.t));
ctx.strokeStyle = rgba(PINK, 0.95);
ctx.lineWidth = 5;
ctx.setLineDash([8, 7]);
ctx.beginPath();
ctx.moveTo(a[0], a[1]);
ctx.lineTo(lerp(a[0], b[0], f), lerp(a[1], b[1], f));
ctx.stroke();
ctx.setLineDash([]);
}
// 글리프
ctx.font = 'bold 28px "Segoe UI", "Noto Sans KR", sans-serif';
for (let i = 0; i < GLYPH_N; i += 1) {
const p = pos(i);
const got = chain.includes(i);
const bad = att && att.to === i;
ctx.fillStyle = rgba(got ? mix(PANEL, MINT, 0.3) : PANEL, 1);
ctx.beginPath();
ctx.arc(p[0], p[1], 24, 0, PI2);
ctx.fill();
ctx.lineWidth = 3;
ctx.strokeStyle = rgba(bad ? PINK : (got ? MINT : LILAC), 1);
ctx.stroke();
ctx.fillStyle = rgba(CREAM, 1);
ctx.save();
ctx.translate(p[0], p[1] + 1);
ctx.rotate(Math.sin(t * 0.06 + i * 3) * 0.22);
ctx.fillText(chars.charAt(i), 0, 0);
ctx.restore();
}
if (inp.key && inp.focus) {
const p = pos(sorted()[kcur]);
ctx.strokeStyle = 'rgba(255,255,255,0.95)';
ctx.lineWidth = 2.5;
ctx.beginPath();
ctx.arc(p[0], p[1], 32, 0, PI2);
ctx.stroke();
}
},
label() {
if (rewind) {
return TXT_REWIND;
}
if (done) {
return TXT_DONE;
}
return TXT_NEXT.replace('{k}', String(chain.length + 1)).replace('{n}', String(GLYPH_N));
},
down(x, y) { click(hit(x, y)); },
move() { return; },
up() { return; },
key(k) {
if (k === 'ArrowRight' || k === 'ArrowDown') {
kcur = (kcur + 1) % GLYPH_N;
return true;
}
if (k === 'ArrowLeft' || k === 'ArrowUp') {
kcur = (kcur + GLYPH_N - 1) % GLYPH_N;
return true;
}
if (k === 'Enter' || k === ' ') {
click(sorted()[kcur]);
return true;
}
return false;
},
};
return scene;
};
return mount(root, make);
})();// CapOrderedGlyphClickTrace - vanilla 판(04-cap-ordered-glyph-click-trace) 의 React 포트. 같은 계산을 useEffect 안에서 돌린다.
import { useEffect, useRef } from "react";
import styles from "./CapOrderedGlyphClickTrace.module.scss";
const cx = (s: string): string => s.split(" ").map((n) => styles[n] ?? n).join(" ");
export default function CapOrderedGlyphClickTrace() {
const rootRef = useRef<HTMLDivElement | null>(null);
useEffect(() => {
const root = rootRef.current;
if (!root) return;
type RGB = [number, number, number];
interface Input { idle: number; focus: boolean; key: boolean; }
interface Scene {
CYCLE: number;
REDUCE_TICKS: number;
reset(): void;
auto(clk: number): void;
step(): void;
draw(ctx: CanvasRenderingContext2D): void;
label(): string;
down(x: number, y: number): void;
move(x: number, y: number): void;
up(x: number, y: number): void;
key(k: string): boolean;
next?(): void;
}
type Make = (inp: Input, reduce: boolean) => Scene;
const W = 480;
const H = 300;
const PI2 = Math.PI * 2;
const FIXED_DT = 16;
const IDLE_TICKS = 150;
const BTN_PAUSE = '멈춤';
const BTN_PLAY = '재생';
const BTN_NEXT = '다음 장면';
// 파스텔 팔레트 - 어두운 판 위에 밝은 색을 얹어 명도 차로 읽힌다
const BG: RGB = [29, 26, 44];
const PANEL: RGB = [44, 40, 68];
const MINT: RGB = [126, 226, 192];
const SKY: RGB = [124, 196, 255];
const LILAC: RGB = [190, 164, 255];
const PINK: RGB = [255, 160, 190];
const PEACH: RGB = [255, 208, 168];
const CREAM: RGB = [255, 244, 224];
const CHARSET = 'ABCDEFGHJKLMNPQRSTUVWXYZabdefghmnqrt23456789';
function clamp(v: number, lo: number, hi: number): number { return v < lo ? lo : (v > hi ? hi : v); }
function lerp(a: number, b: number, k: number): number { return a + (b - a) * k; }
function smooth(x: number): number { const c = clamp(x, 0, 1); return c * c * (3 - 2 * c); }
function easeOutBack(x: number): number { const c = clamp(x, 0, 1) - 1; return 1 + c * c * (2.7 * c + 1.7); }
function rgba(c: RGB, a: number): string {
return 'rgba(' + Math.round(c[0]) + ',' + Math.round(c[1]) + ',' + Math.round(c[2]) + ',' + clamp(a, 0, 1).toFixed(3) + ')';
}
function mix(a: RGB, b: RGB, k: number): RGB {
return [lerp(a[0], b[0], k), lerp(a[1], b[1], k), lerp(a[2], b[2], k)];
}
// 시드 고정 난수 - 같은 시드면 언제나 같은 수열 (선형 합동 방식)
function lcg(seed: number): () => number {
let s = seed >>> 0;
return function () {
s = (Math.imul(s, 1664525) + 1013904223) >>> 0;
return s / 4294967296;
};
}
// 정수 두 개와 시드로 0 이상 1 미만의 값을 만드는 해시 (같은 입력은 늘 같은 값)
function hash2(x: number, y: number, seed: number): number {
let h = (Math.imul(x | 0, 374761393) + Math.imul(y | 0, 668265263) + Math.imul(seed | 0, 1442695041)) | 0;
h = Math.imul(h ^ (h >>> 13), 1274126177);
h ^= h >>> 16;
return (h >>> 0) / 4294967296;
}
// 시드로 뜻 없는 글자열을 만든다
function glyphStr(seed: number, n: number): string {
const r = lcg(seed * 7919 + 13);
let s = '';
for (let i = 0; i < n; i += 1) {
s += CHARSET.charAt(Math.floor(r() * CHARSET.length));
}
return s;
}
function rrect(ctx: CanvasRenderingContext2D, x: number, y: number, w: number, h: number, r: number): void {
const rr = Math.max(0, Math.min(r, w / 2, h / 2));
ctx.beginPath();
ctx.moveTo(x + rr, y);
ctx.lineTo(x + w - rr, y);
ctx.arcTo(x + w, y, x + w, y + rr, rr);
ctx.lineTo(x + w, y + h - rr);
ctx.arcTo(x + w, y + h, x + w - rr, y + h, rr);
ctx.lineTo(x + rr, y + h);
ctx.arcTo(x, y + h, x, y + h - rr, rr);
ctx.lineTo(x, y + rr);
ctx.arcTo(x, y, x + rr, y, rr);
ctx.closePath();
}
function mount(root: HTMLElement, make: Make): () => void {
const canvas = root.querySelector('[data-role="canvas"]') as HTMLCanvasElement;
const statusEl = root.querySelector('[data-role="status"]') as HTMLElement;
const btnEl = root.querySelector('[data-role="btn"]') as HTMLButtonElement;
if (!canvas || !statusEl || !btnEl) {
return function () { return; };
}
const ctx = canvas.getContext('2d') as CanvasRenderingContext2D;
if (!ctx) {
return function () { return; };
}
const dpr = Math.min(window.devicePixelRatio || 1, 2);
canvas.width = Math.round(W * dpr);
canvas.height = Math.round(H * dpr);
ctx.setTransform(dpr, 0, 0, dpr, 0, 0);
const reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
const inp: Input = { idle: 99999, focus: false, key: false };
const scene = make(inp, reduce);
let paused = false;
let rafId = 0;
let lastTs = -1;
let accMs = 0;
let lastLabel = '';
let lastLabelTick = -999;
let lastLive = 'polite';
let tickN = 0;
let clk = 0;
let wasAuto = true;
const cleaners: Array<() => void> = [];
function listen<K extends keyof HTMLElementEventMap>(target: HTMLElement, type: K, fn: (e: HTMLElementEventMap[K]) => void): void {
target.addEventListener(type, fn);
cleaners.push(function () { target.removeEventListener(type, fn); });
}
function show(): void {
scene.draw(ctx);
// 시연이 혼자 돌 때는 낭독을 끄고, 사람이 만지는 동안은 값이 바뀌어도 0.7초에 한 번만 갱신한다
const live = (reduce || inp.idle <= IDLE_TICKS) ? 'polite' : 'off';
if (live !== lastLive) {
lastLive = live;
statusEl.setAttribute('aria-live', live);
}
const t = scene.label();
if (t !== lastLabel && (reduce || live === 'off' || tickN - lastLabelTick >= 44)) {
lastLabel = t;
lastLabelTick = tickN;
statusEl.textContent = t;
}
}
// 고정 간격 한 틱 - 입력이 없으면 시연 스크립트가 같은 입구로 입력을 대신 넣는다
function advance(): void {
inp.idle += 1;
tickN += 1;
const a = inp.idle > IDLE_TICKS;
if (a && !wasAuto) {
scene.reset();
clk = 0;
}
wasAuto = a;
if (a) {
clk += 1;
scene.auto(clk);
if (clk >= scene.CYCLE) {
clk = 0;
scene.reset();
}
}
scene.step();
}
// 움직임 줄이기: 틱을 몰아서 돌린 뒤 한 번만 그린다 (중간 보간 장면은 화면에 나오지 않는다)
function settle(n: number): void {
for (let i = 0; i < n; i += 1) {
inp.idle = 0;
tickN += 1;
scene.step();
}
show();
}
function tick(ts: number): void {
if (lastTs < 0) {
lastTs = ts;
}
const frameDt = Math.min(ts - lastTs, 160);
lastTs = ts;
if (!paused) {
accMs += frameDt;
while (accMs >= FIXED_DT) {
advance();
accMs -= FIXED_DT;
}
show();
}
rafId = requestAnimationFrame(tick);
}
function point(e: PointerEvent): number[] {
const r = canvas.getBoundingClientRect();
return [clamp((e.clientX - r.left) * W / r.width, 0, W), clamp((e.clientY - r.top) * H / r.height, 0, H)];
}
btnEl.textContent = reduce ? BTN_NEXT : BTN_PAUSE;
if (reduce) {
root.classList.remove('is-demo');
for (let i = 0; i < scene.REDUCE_TICKS; i += 1) {
advance();
}
show();
}
listen(btnEl, 'click', function () {
if (reduce) {
if (scene.next) {
scene.next();
show();
return;
}
const n = Math.round(scene.CYCLE / 3);
inp.idle = 99999;
wasAuto = true;
for (let i = 0; i < n; i += 1) {
advance();
}
show();
return;
}
paused = !paused;
if (paused) {
root.classList.remove('is-demo');
}
else {
root.classList.add('is-demo');
}
btnEl.textContent = paused ? BTN_PLAY : BTN_PAUSE;
});
listen(canvas, 'focus', function () { inp.focus = true; if (reduce) { show(); } });
listen(canvas, 'blur', function () { inp.focus = false; inp.key = false; if (reduce) { show(); } });
listen(canvas, 'pointerdown', function (e) {
const p = point(e);
inp.idle = 0;
inp.key = false;
try { canvas.setPointerCapture(e.pointerId); } catch (err) { /* 캡처가 안 되는 환경은 그냥 넘어간다 */ }
scene.down(p[0], p[1]);
if (reduce) { settle(30); }
});
listen(canvas, 'pointermove', function (e) {
const p = point(e);
inp.idle = 0;
inp.key = false;
scene.move(p[0], p[1]);
if (reduce) { settle(30); }
});
listen(canvas, 'pointerup', function (e) {
const p = point(e);
inp.idle = 0;
scene.up(p[0], p[1]);
if (reduce) { settle(30); }
});
listen(canvas, 'keydown', function (e) {
inp.idle = 0;
inp.key = true;
if (scene.key(e.key)) {
e.preventDefault();
}
if (reduce) { settle(30); }
});
if (!reduce) {
rafId = requestAnimationFrame(tick);
}
return function () {
cancelAnimationFrame(rafId);
for (let i = 0; i < cleaners.length; i += 1) {
cleaners[i]();
}
};
}
const GLYPH_N = 4; // 순서대로 눌러야 하는 글리프 수
const HIT_R = 26; // 누른 점이 글리프 중심에서 이만큼 안이면 맞춘 것
const JITTER = 6; // 글리프가 제자리에서 떨리는 폭 (px)
const LINE_LERP = 0.16; // 선 머리가 한 틱에 남은 거리의 이만큼씩 자란다
const TXT_NEXT = '다음 글리프 {k} / {n}';
const TXT_REWIND = '순서가 어긋나 처음으로 되감는다';
const TXT_DONE = '순서대로 모두 이었다';
// PURE-BEGIN
// 서로 minDist 이상 떨어진 글리프 자리를 시드로 뽑는다 (영역은 가로 44~436, 세로 116~268)
function placeGlyphs(seed: number, n: number, minDist: number): number[][] {
const r = lcg(seed * 613 + 17);
const pts: number[][] = [];
let guard = 0;
while (pts.length < n && guard < 400) {
guard += 1;
const x = 44 + r() * 392;
const y = 116 + r() * 152;
let ok = true;
for (let i = 0; i < pts.length; i += 1) {
const dx = pts[i][0] - x;
const dy = pts[i][1] - y;
if (dx * dx + dy * dy < minDist * minDist) { ok = false; }
}
if (ok) { pts.push([x, y]); }
}
return pts;
}
// 0 부터 n-1 까지를 시드로 섞은 눌러야 할 순서
function clickOrder(seed: number, n: number): number[] {
const r = lcg(seed * 211 + 5);
const a: number[] = [];
for (let i = 0; i < n; i += 1) { a.push(i); }
for (let i = n - 1; i > 0; i -= 1) {
const j = Math.floor(r() * (i + 1));
const t = a[i];
a[i] = a[j];
a[j] = t;
}
return a;
}
// 선 머리를 목표 쪽으로 한 걸음 보간한다
function growStep(v: number, lerpK: number): number { return Math.min(1, v + (1 - v) * lerpK + 0.012); }
// PURE-END
interface Attempt { from: number; to: number; t: number; }
const make: Make = (inp, reduce) => {
let seed = 5;
let base: number[][] = [];
let chars = '';
let order: number[] = [];
let chain: number[] = [];
let seg: number[] = [];
let att: Attempt | null = null;
let rewind = false;
let done = false;
let t = 0;
let kcur = 0;
function setup(): void {
base = placeGlyphs(seed, GLYPH_N, 92);
chars = glyphStr(seed + 40, GLYPH_N);
order = clickOrder(seed, GLYPH_N);
chain = [];
seg = [];
att = null;
rewind = false;
done = false;
}
setup();
function pos(i: number): number[] {
const w = t * 0.08;
return [base[i][0] + JITTER * Math.sin(w + i * 2.1) + JITTER * 0.4 * Math.sin(w * 3.7 + i), base[i][1] + JITTER * Math.cos(w * 1.2 + i * 1.3) + JITTER * 0.4 * Math.cos(w * 4.1 + i * 2)];
}
function click(i: number): void {
if (rewind || i < 0) { return; }
if (done) {
// 다 이은 판을 다시 누르면 새 판으로 넘어간다
seed += 1;
setup();
return;
}
const want = order[chain.length];
if (i === want) {
chain.push(i);
if (chain.length > 1) { seg.push(0); }
if (chain.length === GLYPH_N) { done = true; }
}
else if (!chain.includes(i)) {
att = { from: chain.length ? chain[chain.length - 1] : -1, to: i, t: 1 };
rewind = true;
}
}
function hit(x: number, y: number): number {
let best = -1;
let bd = HIT_R * HIT_R;
for (let i = 0; i < GLYPH_N; i += 1) {
const p = pos(i);
const d = (p[0] - x) * (p[0] - x) + (p[1] - y) * (p[1] - y);
if (d <= bd) { bd = d; best = i; }
}
return best;
}
function sorted(): number[] {
const idx: number[] = [];
for (let i = 0; i < GLYPH_N; i += 1) { idx.push(i); }
idx.sort((a, b) => base[a][0] - base[b][0]);
return idx;
}
const scene: Scene = {
CYCLE: 134,
REDUCE_TICKS: 110,
reset() { seed += 1; setup(); },
auto(clk) {
// 둘째 글리프까지 잇다가 일부러 틀려 되감기를 보이고 다시 순서대로 잇는다
if (clk === 8) { click(order[0]); }
if (clk === 20) { click(order[1]); }
if (clk === 32) { click(order[3]); }
if (clk === 62) { click(order[0]); }
if (clk === 74) { click(order[1]); }
if (clk === 86) { click(order[2]); }
if (clk === 98) { click(order[3]); }
},
step() {
t += 1;
if (rewind) {
// 끝 선부터 한 줄씩 되감아 처음 글리프까지 돌아간다
if (seg.length > 0) {
const k = seg.length - 1;
seg[k] -= 0.1;
if (seg[k] <= 0) { seg.pop(); chain.pop(); }
}
else {
chain = [];
}
if (att) { att.t -= 1 / 24; if (att.t <= 0) { att = null; } }
if (seg.length === 0 && !att) { chain = []; rewind = false; }
}
else if (seg.length > 0) {
const k = seg.length - 1;
seg[k] = growStep(seg[k], LINE_LERP);
}
},
draw(ctx) {
ctx.fillStyle = rgba(BG, 1);
ctx.fillRect(0, 0, W, H);
ctx.fillStyle = rgba(PANEL, 1);
rrect(ctx, 14, 46, W - 28, 52, 14);
ctx.fill();
// 순서 안내 줄 - 눌러야 할 순서대로 글자가 늘어선다
ctx.font = 'bold 26px "Segoe UI", "Noto Sans KR", sans-serif';
ctx.textAlign = 'center';
ctx.textBaseline = 'middle';
for (let k = 0; k < GLYPH_N; k += 1) {
const cx = W / 2 + (k - (GLYPH_N - 1) / 2) * 84;
const got = k < chain.length;
ctx.fillStyle = rgba(got ? MINT : CREAM, got ? 1 : 0.9);
ctx.fillText(chars.charAt(order[k]), cx, 73);
if (k < GLYPH_N - 1) {
ctx.strokeStyle = rgba(CREAM, 0.45);
ctx.lineWidth = 2;
ctx.beginPath();
ctx.moveTo(cx + 24, 73);
ctx.lineTo(cx + 40, 73);
ctx.stroke();
}
}
// 이어진 선
ctx.lineCap = 'round';
for (let k = 0; k < seg.length; k += 1) {
const a = pos(chain[k]);
const b = pos(chain[k + 1]);
const f = clamp(seg[k], 0, 1);
ctx.strokeStyle = rgba(MINT, 0.9);
ctx.lineWidth = 5;
ctx.beginPath();
ctx.moveTo(a[0], a[1]);
ctx.lineTo(lerp(a[0], b[0], f), lerp(a[1], b[1], f));
ctx.stroke();
}
if (att && att.from >= 0) {
const a = pos(att.from);
const b = pos(att.to);
const f = Math.sin(Math.PI * (1 - att.t));
ctx.strokeStyle = rgba(PINK, 0.95);
ctx.lineWidth = 5;
ctx.setLineDash([8, 7]);
ctx.beginPath();
ctx.moveTo(a[0], a[1]);
ctx.lineTo(lerp(a[0], b[0], f), lerp(a[1], b[1], f));
ctx.stroke();
ctx.setLineDash([]);
}
// 글리프
ctx.font = 'bold 28px "Segoe UI", "Noto Sans KR", sans-serif';
for (let i = 0; i < GLYPH_N; i += 1) {
const p = pos(i);
const got = chain.includes(i);
const bad = att && att.to === i;
ctx.fillStyle = rgba(got ? mix(PANEL, MINT, 0.3) : PANEL, 1);
ctx.beginPath();
ctx.arc(p[0], p[1], 24, 0, PI2);
ctx.fill();
ctx.lineWidth = 3;
ctx.strokeStyle = rgba(bad ? PINK : (got ? MINT : LILAC), 1);
ctx.stroke();
ctx.fillStyle = rgba(CREAM, 1);
ctx.save();
ctx.translate(p[0], p[1] + 1);
ctx.rotate(Math.sin(t * 0.06 + i * 3) * 0.22);
ctx.fillText(chars.charAt(i), 0, 0);
ctx.restore();
}
if (inp.key && inp.focus) {
const p = pos(sorted()[kcur]);
ctx.strokeStyle = 'rgba(255,255,255,0.95)';
ctx.lineWidth = 2.5;
ctx.beginPath();
ctx.arc(p[0], p[1], 32, 0, PI2);
ctx.stroke();
}
},
label() {
if (rewind) { return TXT_REWIND; }
if (done) { return TXT_DONE; }
return TXT_NEXT.replace('{k}', String(chain.length + 1)).replace('{n}', String(GLYPH_N));
},
down(x, y) { click(hit(x, y)); },
move() { return; },
up() { return; },
key(k) {
if (k === 'ArrowRight' || k === 'ArrowDown') { kcur = (kcur + 1) % GLYPH_N; return true; }
if (k === 'ArrowLeft' || k === 'ArrowUp') { kcur = (kcur + GLYPH_N - 1) % GLYPH_N; return true; }
if (k === 'Enter' || k === ' ') { click(sorted()[kcur]); return true; }
return false;
},
};
return scene;
};
return mount(root, make);
}, []);
return (
<div className={cx("cp") + " is-demo"} id="cp" ref={rootRef}>
<canvas className={cx("cp__canvas")} data-role="canvas" width="480" height="300" tabIndex={0} aria-label="흩어진 글리프를 순서대로 누르면 선이 이어져 그려지는 확인"></canvas>
<p className={cx("cp__status")} data-role="status" aria-live="polite">시연 준비 중</p>
<button className={cx("cp__btn")} data-role="btn" type="button">멈춤</button>
</div>
);
}04 散らばった文字を順番に押すと線がつながって描かれる確認 — 計測 累積面積 17.943% · 動いたフレーム 23/23GODRICH オリジナル · SCSS と React は zip に同梱 · css captcha 9パターン — 歪んだ文字・回転合わせ・ノイズの中の文字で人を確かめる場面
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