ChronicleOfTheImmortalClan/scripts/gen-art.mjs

#!/usr/bin/env node
/**
 * gen-art.mjs — 程序化生成 SVG 素材（金碧山水/纹样/饰件），零外部资源。
 * 用法：node scripts/gen-art.mjs （产物写 src/renderer/assets/gen/*.svg）
 */
import { mkdirSync, writeFileSync } from 'node:fs'
import { dirname, join } from 'node:path'
import { fileURLToPath } from 'node:url'

const OUT = join(dirname(fileURLToPath(import.meta.url)), '../src/renderer/assets/gen')
mkdirSync(OUT, { recursive: true })

// ============ 1. 金碧山水全景（主背景） ============
function goldenLandscape() {
  const ridge = (y, amp, seed, opacity) => {
    const pts = []
    let x = -40
    let phase = seed
    while (x <= 1280) {
      const yy = y + Math.sin((x / 170) + phase) * amp + Math.sin((x / 71) + phase * 2.2) * amp * 0.3
      pts.push(`${x.toFixed(0)},${yy.toFixed(0)}`)
      phase += 0.35
      x += 80
    }
    return `<polygon points="${pts.join(' ')} 1300,760 -40,760" fill="#8a6d2f" opacity="${opacity}" />`
  }
  return `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 760" preserveAspectRatio="xMidYMax slice">
  <defs>
    <linearGradient id="sky" x1="0" y1="0" x2="0" y2="1">
      <stop offset="0" stop-color="#181208"/>
      <stop offset="0.65" stop-color="#241a10"/>
      <stop offset="1" stop-color="#38271a"/>
    </linearGradient>
    <radialGradient id="sun" cx="0.5" cy="0.5" r="0.5">
      <stop offset="0" stop-color="#f2cf7e" stop-opacity="0.9"/>
      <stop offset="0.5" stop-color="#c99a3d" stop-opacity="0.35"/>
      <stop offset="1" stop-color="#c99a3d" stop-opacity="0"/>
    </radialGradient>
    <filter id="blur2"><feGaussianBlur stdDeviation="2"/></filter>
    <filter id="blur6"><feGaussianBlur stdDeviation="6"/></filter>
  </defs>
  <rect width="1200" height="760" fill="url(#sky)"/>
  <circle cx="905" cy="150" r="130" fill="url(#sun)"/>
  <circle cx="905" cy="150" r="30" fill="#f6dd9d" opacity="0.75" filter="url(#blur2)"/>
  ${ridge(420, 46, 1.4, 0.10)}
  ${ridge(500, 52, 2.1, 0.15)}
  ${ridge(590, 46, 3.2, 0.22)}
  <g stroke="#cbb35f" stroke-width="1.6" opacity="0.35" fill="none" filter="url(#blur2)">
    <path d="M300 262 q16 -11 32 0 q16 -11 32 0"/>
    <path d="M250 288 q14 -10 28 0 q14 -10 28 0"/>
    <path d="M980 205 q13 -9 26 0 q13 -9 26 0"/>
  </g>
  <g stroke="#cbb35f" stroke-width="0.9" opacity="0.22">
    <path d="M60 620 h300 M60 640 h220 M60 660 h150" />
  </g>
  <rect x="0" y="700" width="1200" height="60" fill="#1c1409" opacity="0.4"/>
</svg>`
}

// ============ 2. 祥云纹带（分隔/装饰） ============
function cloudBand() {
  const cloud = (x, y, s, o) =>
    `<g transform="translate(${x},${y}) scale(${s})" fill="#cbb35f" opacity="${o}">
       <path d="M0 0 q14 -20 34 -18 q26 2 30 14 q18 -4 26 8 q4 12 -8 16 H8 q-14 -2 -8 -20z"/>
     </g>`
  let out = ''
  for (let i = 0; i < 6; i++) out += cloud(i * 200 - 20, ((i % 2) * 10) - 4, 0.9 + (i % 3) * 0.15, 0.5 - (i % 2) * 0.15)
  return `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 60">${out}</svg>`
}

// ============ 3. 回纹角饰（卡片角框） ============
function meanderCorner() {
  const sq = (x, y, s) => `<path d="M${x} ${y + s} h${s} v${s} h${-s * 0} z" fill="none" stroke="#b3913e" stroke-width="2"/>`
  let p = ''
  for (let i = 0; i < 4; i++) {
    p += `<path d="M${i * 8 + 0} 0 v${i * 8 + 0} M0 ${i * 8 + 0} h${i * 8 + 0}" />`
  }
  return `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 40 40">
    <g fill="none" stroke="#b3913e" stroke-width="1.6" opacity="0.7">
      <path d="M4 36 L4 4 L36 4" />
      <path d="M10 30 L10 10 L34 10" />
      <path d="M16 24 L16 16 L30 16" />
    </g>
  </svg>`
}

// ============ 4. 仙鹤（点缀） ============
function crane() {
  return `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 120 60">
    <g stroke="#e0cf9b" stroke-width="2.2" fill="none" opacity="0.7" stroke-linecap="round">
      <path d="M8 52 q22 -18 42 -16"/>
      <path d="M50 36 q14 12 30 14"/>
      <path d="M44 34 L22 22 M44 34 L70 20 M44 34 L52 14"/>
    </g>
    <circle cx="42" cy="33" r="2.4" fill="#e6b84c" opacity="0.9"/>
  </svg>`
}

// ============ 5. 星辰点缀层 ============
function starfield() {
  let p = ''
  for (let i = 0; i < 42; i++) {
    const x = ((i * 137) % 1200)
    const y = ((i * 83) % 420)
    const r = 0.6 + (i % 3) * 0.5
    const o = 0.12 + ((i * 7) % 5) * 0.09
    p += `<circle cx="${x}" cy="${y}" r="${r}" fill="#f4dc9a" opacity="${o}"/>`
  }
  return `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 460">${p}</svg>`
}

const out = {
  'landscape-gold.svg': goldenLandscape(),
  'cloud-band.svg': cloudBand(),
  'meander-corner.svg': meanderCorner(),
  'crane.svg': crane(),
  'starfield.svg': starfield()
}

for (const [name, svg] of Object.entries(out)) {
  writeFileSync(join(OUT, name), svg, 'utf-8')
  console.log('✓', name, `${svg.length} B`)
}
console.log('gen-art done →', OUT)