{
  "id": "city-tamping-rammer",
  "type": "model",
  "title": "小型の振動タンピングランマー",
  "titleEn": "Compact tamping rammer",
  "description": "狭い溝や道路補修現場の転圧作業を表す縦型ランマー。矩形の足、伸縮脚、蛇腹カバー、駆動ケース、エンジンと防振ハンドルを備えます。プレート転圧機とは異なる狭所用機器の静的形状です。 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。 外接寸法（X×Y×Z）0.460 × 1.171 × 0.480 m、26,308三角形。単位m・Y-up、水平中央の接地用原点、最下点Y=0。部品ごとの重複UV0と単色PBR材質を収録し、画像テクスチャ・UV2・コライダー・LOD・リグ・動作は付属しません。静的表示用でUnity/VRChat実機検証は未実施。STLはm・Y-up座標の形状のみで色・材質・UV・階層を含みません。",
  "descriptionEn": "A vertical tamping rammer for narrow trench and road-repair scenes, with a rectangular shoe, telescopic leg, protective bellows, gearbox, engine and isolated handle. This is a narrow-area tamping machine, functionally distinct from a plate compactor; no operational motion is included. For games and visualization; not validated for manufacture, structural engineering or 3D printing. Bounding dimensions (X×Y×Z): 0.460 × 1.171 × 0.480 m; 26,308 triangles. Metres, Y-up, horizontally centered placement origin with minimum Y=0, not an articulation or wall-mount pivot. Includes overlapping component UV0 and constant-color PBR materials, with no image textures, unique UV2, colliders, LOD, rig or runtime behavior. Static visualization only; Unity/VRChat editor and runtime tests have not been performed. STL uses metre-valued Y-up coordinates and contains geometry only, without color, materials, UVs or hierarchy.",
  "category": "urban",
  "tags": [
    "city",
    "street",
    "original",
    "rammer",
    "tamping",
    "construction",
    "ランマー"
  ],
  "author": "Xenoah",
  "license": "CC-BY-4.0",
  "version": "1.0.0",
  "status": "public",
  "created": "2026-10-14",
  "updated": "2026-10-14",
  "thumbnail": "https://raw.githubusercontent.com/Xenoah/meshcopia/19c77f5d75f69599aabb6e306a2cf1beb230b1f5/content/assets/city-tamping-rammer/preview.png",
  "preview": "city-tamping-rammer.glb",
  "unit": "m",
  "upAxis": "Y",
  "triangles": 26308,
  "dimensions": [
    0.46,
    1.171,
    0.48
  ],
  "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 original city expansion generator 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_expansion/frozen/batch-004/scripts/city_expansion/construction_machines.py",
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    "sourceRecipeSha256": "4d0e899c5719f36250a887a05f620cc9107549c4c7c836225d1e1e14e54cc0e2",
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    "alternateFormat": "STL triangulated from the exact reimported GLB, metre-valued Y-up coordinates. No printability or manufacture validation.",
    "stlSha256": "ea5dbaffeaa243bb625b1468f20c3afe7e1967b089054d2f0271c56d0da125de"
  },
  "usages": [
    {
      "relationship": "original",
      "project": "Meshcopia",
      "sourceUrl": "https://github.com/Xenoah/meshcopia",
      "sourcePaths": [
        "scripts/city_expansion/frozen/batch-004/scripts/city_expansion/construction_machines.py",
        "scripts/city_expansion/frozen/batch-004/scripts/city_expansion/common.py"
      ],
      "selectors": [
        "city-tamping-rammer"
      ],
      "context": "Original city asset created for this library. No external deployment or reuse claimed."
    }
  ],
  "pageUrl": "https://xenoah.github.io/meshcopia/assets/city-tamping-rammer/",
  "manifestUrl": "https://xenoah.github.io/meshcopia/api/assets/city-tamping-rammer.json",
  "attribution": "Compact tamping rammer by Xenoah / Meshcopia\nhttps://xenoah.github.io/meshcopia/assets/city-tamping-rammer/\nCC BY 4.0 — https://creativecommons.org/licenses/by/4.0/\nChanges: none. If modified, replace this line with a description of your changes.",
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        "filename": "LICENSE.txt",
        "sha256": "e6553fea0974febce2f17ae448057373d442a3da2490251547fb80370bb30778",
        "text": "Compact tamping rammer 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-tamping-rammer/\nProvided as-is, without warranties (license Section 5).\nChanges: none.\nAdditional changes: Converted unchanged source GLB geometry to FBX, with documented compatible material/texture derivatives.\n"
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}