timeline_check.mjs

// 时间轴核算：直接跑管线，按 app.js 的算法算"抬笔移动/停顿/绘制"三段时间// 用法: node dev/timeline_check.mjs dev/s2.raw [colors]import fs from 'node:fs';import path from 'node:path';import { fileURLToPath, pathToFileURL } from 'node:url';const here = path.dirname(fileURLToPath(import.meta.url));const root = path.resolve(here, '..');await import(pathToFileURL(path.join(root, 'js/pipeline.js')).href);const [rawPath, colorsArg] = process.argv.slice(2);const colors = colorsArg ? +colorsArg : 24;const buf = fs.readFileSync(rawPath);const W = buf.readInt32LE(0), H = buf.readInt32LE(4);const px = new Uint8ClampedArray(buf.buffer, buf.byteOffset + 8, W * H * 4);const res = await globalThis.ISP_PIPELINE.run(px, W, H, { colors, targetSec: 240 }, () => {});const S = res.strokes;const targetMs = 240000;function timeline(travelRule, capFrac) {  let ex = 0, ey = 0, raw = 0, prevPh = -1, jumped = 0;  const tr = new Float64Array(S.length);  const bt = new Float64Array(S.length);  for (let i = 0; i < S.length; i++) {    const tp = S[i].tp;    if (i > 0) {      const d = Math.hypot(tp[0] - ex, tp[1] - ey);      tr[i] = travelRule(d);      if (tr[i] > 0) jumped++;    }    const ph = S[i].ph === undefined ? 1 : S[i].ph;    if (prevPh >= 0 && ph !== prevPh) bt[i] = ph === 3 ? 700 : 420;    prevPh = ph;    ex = tp[tp.length - 2]; ey = tp[tp.length - 1];    raw += S[i].ms;  }  let sumT = 0; for (let i = 0; i < S.length; i++) sumT += tr[i];  const cap = targetMs * capFrac;  if (sumT > cap) { const sc = cap / sumT; for (let i = 0; i < S.length; i++) tr[i] *= sc; }  let nonPaint = 0; for (let i = 0; i < S.length; i++) nonPaint += tr[i] + bt[i];  const budget = Math.max(S.length * 3, targetMs - nonPaint);  const k = budget / raw;  let msPaint = 0;  for (let i = 0; i < S.length; i++) msPaint += Math.max(3, S[i].ms * k);  return { nonPaint: nonPaint / 1000, travel: tr.reduce((a, b) => a + b, 0) / 1000, jumped, msPaint: msPaint / 1000, total: (nonPaint + msPaint) / 1000 };}const phases = [0, 1, 2, 3].map((p) => S.filter((s) => s.ph === p).length);console.log(`${path.basename(rawPath)}  ${W}x${H}  笔数 ${S.length}  各阶段 ${phases.join('/')}`);const cur = timeline((d) => (d < 40 ? 0 : Math.min(200, 30 + (d - 40) * 0.35)), 0.2);console.log(`  现在:  移动 ${cur.travel.toFixed(0)}s(${cur.jumped}次抬笔)  停顿 ${(cur.nonPaint - cur.travel).toFixed(0)}s  绘制 ${cur.msPaint.toFixed(0)}s  → 总 ${cur.total.toFixed(0)}s`);const alt = timeline((d) => (d < 40 ? 0 : Math.min(200, 30 + (d - 40) * 0.35)), 0.12);console.log(`  收紧:  移动 ${alt.travel.toFixed(0)}s(${alt.jumped}次抬笔)  停顿 ${(alt.nonPaint - alt.travel).toFixed(0)}s  绘制 ${alt.msPaint.toFixed(0)}s  → 总 ${alt.total.toFixed(0)}s`);