{
  "id": "city-commuter-bicycle",
  "type": "model",
  "title": "シティコミューターバイク",
  "titleEn": "City commuter bicycle",
  "description": "ダイヤモンドフレーム、スポーク車輪、連続したリンクチェーン、クランク、ブレーキ、泥よけと荷台を備えた街乗り自転車。 ゲーム・可視化向け。製造・構造設計・3Dプリント用途は未検証。 繰り返し部品は材質と構成単位ごとに統合済み。",
  "descriptionEn": "Unbranded commuter bicycle with diamond frame, cross-laced spokes, linked chain drive, cranks, pedals, rim brakes and cables, fenders, rear rack and lights. Static visualization assembly, not a rideable or engineering-validated design. For games and visualization; not validated for manufacture, structural engineering or 3D printing. Repeated static details are grouped by material and assembly; the procedural source retains the editable construction.",
  "category": "urban",
  "tags": [
    "city",
    "street",
    "original",
    "bicycle",
    "commuter",
    "transport",
    "自転車"
  ],
  "author": "Xenoah",
  "license": "CC-BY-4.0",
  "version": "1.0.0",
  "status": "public",
  "created": "2026-10-14",
  "updated": "2026-10-14",
  "thumbnail": "https://xenoah.github.io/meshcopia/assets/city-commuter-bicycle/thumbnail.png",
  "preview": "city-commuter-bicycle.glb",
  "unit": "m",
  "upAxis": "Y",
  "triangles": 78188,
  "dimensions": [
    1.825677,
    1.064924,
    0.647
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  "uv": "Per-component primitive or automatically unwrapped UVs. Overlapping between components; not a packed unique lightmap atlas. Solid-color PBR materials; no external textures. STL has no colors or UVs.",
  "provenance": {
    "method": "Original AI-agent-authored procedural city geometry",
    "tool": "Blender 4.3.2; Meshcopia city generator 1.0; Meshcopia attribute-preserving static grouping 1.0",
    "rights": "Original geometry and material design created for Xenoah Meshcopia under the owner request for CC-BY-4.0 publication. No third-party meshes, scans, brands, logos or font files.",
    "generatorUrl": "https://github.com/Xenoah/meshcopia/blob/main/scripts/city/civic_bicycle.py",
    "sourceSha256": "c66ef97bae7dd28d84adc334e03c7302a2b1a0c76e1ce38fdf3369a4d6085896",
    "stlSha256": "aeea7938637fb25af5f43f4b90d4781a91d5471b60f51cfe5d1e7e3f9733dd04",
    "staticGrouping": {
      "profile": "bicycle",
      "meshNodesBefore": 576,
      "meshNodesAfter": 73,
      "primitiveInstancesBefore": 576,
      "primitiveInstancesAfter": 73,
      "triangles": 78188,
      "materialsBefore": 11,
      "materialsAfter": 11,
      "sourceSha256": "9206cdf69ddbbf3d41f17da59fb848c68ada723bfebf6d6197c1a20a23821ab4",
      "groupedSha256": "c66ef97bae7dd28d84adc334e03c7302a2b1a0c76e1ce38fdf3369a4d6085896",
      "positionOperation": "translation baked to float32; validate roundoff bound",
      "normalUvMaterialOperation": "source float values/material JSON preserved; no normal recomputation",
      "geometrySimplification": false
    },
    "postprocessGeneratorUrl": "https://github.com/Xenoah/meshcopia/blob/main/scripts/city/civic_grouped_assets.py",
    "changes": "Repeated static details grouped by material and named assembly with original triangle-corner normals, UVs and material records preserved; no geometry simplification. Baseline GLB SHA-256: 9206cdf69ddbbf3d41f17da59fb848c68ada723bfebf6d6197c1a20a23821ab4."
  },
  "usages": [
    {
      "relationship": "original",
      "project": "Meshcopia",
      "sourceUrl": "https://github.com/Xenoah/meshcopia",
      "sourcePaths": [
        "scripts/city/civic_bicycle.py",
        "scripts/city/common.py",
        "scripts/city/civic.py",
        "scripts/city/civic_static_groups.py",
        "scripts/city/civic_grouped_assets.py"
      ],
      "selectors": [
        "city-commuter-bicycle"
      ],
      "context": "Original city asset created for this library. No external deployment or reuse claimed."
    }
  ],
  "pageUrl": "https://xenoah.github.io/meshcopia/assets/city-commuter-bicycle/",
  "manifestUrl": "https://xenoah.github.io/meshcopia/api/assets/city-commuter-bicycle.json",
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  "licenseUrl": "https://creativecommons.org/licenses/by/4.0/",
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      "schemaVersion": 1,
      "id": "city-commuter-bicycle",
      "assetVersion": "1.0.0",
      "packageVersion": "1.0.0",
      "contentPolicy": "fbx-required-textures-single-notice-v1",
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        "filename": "LICENSE.txt",
        "sha256": "5193ba1cb7b8edd2ba09f642f012ad98cafa23adc939f030e26e5328e3c2ed9f",
        "text": "City commuter bicycle by Xenoah / Meshcopia\nCopyright (c) 2026 Xenoah\nCC BY 4.0: https://creativecommons.org/licenses/by/4.0/\nSource: https://xenoah.github.io/meshcopia/assets/city-commuter-bicycle/\nProvided as-is, without warranties (license Section 5).\nChanges: Repeated static details grouped by material and named assembly with original triangle-corner normals, UVs and material records preserved; no geometry simplification.\nAdditional changes: Converted unchanged source GLB geometry to FBX, with documented compatible material/texture derivatives.\n"
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}