Gạch chân bút marker cho tiêu đề

Mọi thứ trên trang này đều có bản máy đọc. Đưa agent link JSON, hoặc thêm MCP server gimgs rồi bảo nó tìm motion template.

1. Tải JSON — trong đó có công thức cảnh quay (timing, easing, bảng tham số, lỗi hay gặp) và toàn bộ source TSX.
2. Clone repo video-shotcraft; component import fixture chung từ demos/_fixtures và helper từ assets/lib.
3. Đăng ký component thành <Composition> trong project Remotion rồi render bằng `npx remotion render`, hoặc dựng lại công thức bằng engine của bạn.

curl -s https://gimgs.net/motion/marker-underline-title.json

git clone https://github.com/Vincentwei1021/video-shotcraft
# component: demos/typography/marker-underline-title/MarkerUnderlineTitle.tsx
npx remotion render <CompositionId> out.mp4

claude mcp add --transport http gimgs https://gimgs.net/mcp
# then: search_motion_templates / get_motion_template("marker-underline-title")

Use the video-shotcraft shot recipe "Gạch chân bút marker cho tiêu đề" (Remotion composition, Apache-2.0) published on gimgs.net.
Recipe JSON (prompt = timing/easing/parameter table/pitfalls, files = TSX source): https://gimgs.net/motion/marker-underline-title.json
Raw TSX: https://gimgs.net/motion/marker-underline-title/template.html
Repository: https://github.com/Vincentwei1021/video-shotcraft  (component: demos/typography/marker-underline-title/MarkerUnderlineTitle.tsx; imports demos/_fixtures and assets/lib)
Spec: 1920x1080, 30 fps, 3.39s

1. Read the JSON and follow its "prompt" section (when to use, intention, parameter table, known pitfalls).
2. Adapt it for: <describe what you want>.
3. Either clone the repo, register the component as a <Composition> in a Remotion project and run npx remotion render <CompositionId> out.mp4 — or re-implement the recipe in your own engine (HTML/WAAPI works: keep the same timing and easing).

JSON · Markdown · llms.txt

// ===== demos/typography/marker-underline-title/MarkerUnderlineTitle.tsx =====
// marker-underline-title —— 白底大标题落定后，斜体 "new" 下方一道
// 马克笔下划线从左到右描画（粗细变化/端头圆润/微歪/边缘毛糙）。
// 对标 notion-ai.mp4 2.3–3.6s。与库内 draw-svg-trace 撞车，本版做马克笔质感。
import React, { useId } from 'react';
import { AbsoluteFill, interpolate, useCurrentFrame } from 'remotion';

const mulberry32 = (a: number) => () => {
  let t = (a += 0x6d2b79f5);
  t = Math.imul(t ^ (t >>> 15), t | 1);
  t ^= t + Math.imul(t ^ (t >>> 7), t | 61);
  return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
};

// 马克笔笔画：中轴微歪的路径 + 变宽轮廓，一次生成多边形
const buildStroke = (len: number, seed: number) => {
  const rand = mulberry32(seed);
  const N = 40;
  const top: string[] = [];
  const bot: string[] = [];
  // 预生成微歪偏移（低频）与毛糙（高频）
  const wob = Array.from({ length: N + 1 }, () => rand() - 0.5);
  for (let i = 0; i <= N; i++) {
    const t = i / N;
    const x = t * len;
    // 中轴：跟随斜体微上斜（左低右高，对照截图）+ 缓波
    const mid = 19 - t * 9 + Math.sin(t * Math.PI * 1.6 + 0.4) * 2.6 + wob[i] * 1.6;
    // 宽度：起笔略细→中段饱满→收笔收尖，加高频毛糙
    const wBase = 14 + Math.sin(t * Math.PI) * 6 - Math.max(0, t - 0.86) * 46;
    const w = Math.max(2.2, wBase + wob[i] * 3);
    top.push(`${x.toFixed(1)},${(mid - w / 2).toFixed(1)}`);
    bot.push(`${x.toFixed(1)},${(mid + w / 2).toFixed(1)}`);
  }
  return `M${top.join('L')}L${bot.reverse().join('L')}Z`;
};

export const MarkerUnderlineTitle: React.FC = () => {
  const frame = useCurrentFrame();
  // clipPath ID 按实例生成，多实例同场不串引（useId 的 «:» 在 url() 里非法，需清洗）
  const revealId = `reveal-${useId().replace(/[^a-zA-Z0-9]/g, '')}`;
  const LEN = 252;

  // 标题落定：整块从下方 30px 弹入（ease-out），24 帧内完成
  const enter = interpolate(frame, [0, 22], [0, 1], {
    extrapolateLeft: 'clamp', extrapolateRight: 'clamp',
  });
  const eo = 1 - Math.pow(1 - enter, 3);
  const titleY = (1 - eo) * 36;
  const titleOp = Math.min(1, enter * 1.6);

  // 下划线：标题落定停一拍后描画，10 帧从左到右（提速一档），ease-out
  const draw = interpolate(frame, [32, 42], [0, 1], {
    extrapolateLeft: 'clamp', extrapolateRight: 'clamp',
  });
  const drawE = 1 - Math.pow(1 - draw, 2.2);
  const path = buildStroke(LEN, 77);

  return (
    <AbsoluteFill style={{ background: '#f4f4f2', alignItems: 'center', justifyContent: 'center' }}>
      <div style={{
        opacity: titleOp, transform: `translateY(${titleY}px)`,
        fontFamily: '-apple-system, "Helvetica Neue", Arial, sans-serif',
        fontWeight: 700, fontSize: 118, color: '#191919',
        textAlign: 'center', lineHeight: 1.12, letterSpacing: '-0.02em',
      }}>
        <div>
          Meet the{' '}
          <span style={{ fontStyle: 'italic', position: 'relative', display: 'inline-block' }}>
            new
            {/* 马克笔下划线：clip 从左到右揭示，保留笔形本身的粗细变化 */}
            <svg
              width={LEN} height={44} viewBox={`0 0 ${LEN} 44`}
              style={{ position: 'absolute', left: -12, bottom: -20, overflow: 'visible' }}
            >
              <defs>
                <clipPath id={revealId}>
                  <rect x={0} y={-20} width={drawE * (LEN + 6)} height={60} />
                </clipPath>
              </defs>
              {draw > 0 && (
                <path d={path} fill="#111111" clipPath={`url(#${revealId})`} />
              )}
            </svg>
          </span>
        </div>
        <div>Notion AI</div>
      </div>
    </AbsoluteFill>
  );
};

1. Read the recipe
   Prompt = when to use, intention, parameter table with typical values and how each one feels, known pitfalls. Treat values as calibrated starting points.
2. Get the code
   tool: git
   git clone https://github.com/Vincentwei1021/video-shotcraft && cd video-shotcraft && npm install
3. Register + render
   tool: remotion
   npx remotion render <CompositionId> out.mp4 # component: demos/typography/marker-underline-title/MarkerUnderlineTitle.tsx
4. Or re-implement
   Port the timing/easing from the recipe to HTML + WAAPI (gimgs motion contract) or any engine; keep the same segment windows and easing.