City-Lifeline-Cockpit/tools/city-massing/house-library/library.json

{
  "schema_version": 1,
  "library": "county-residential-prototype-01",
  "seed": 20260918,
  "blender_version": "5.2.2 LTS",
  "blend_file": "house-library.blend",
  "authoring_coordinates": {
    "units": "metres",
    "unit_scale": 1,
    "up": "+Z",
    "front": "+Y",
    "origin": "nominal footprint centre at ground Z=0",
    "transforms": "identity"
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  "gltf_coordinates": {
    "up": "+Y",
    "front": "-Z",
    "from_blender_xyz": [
      "x",
      "z",
      "-y"
    ],
    "note": "Standard glTF axis conversion is already applied. Blender import restores Z-up; do not rotate twice."
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  "recommended_scale_xyz": {
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    "y": [
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    "z": [
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  "assembly": "Link joined_object from the blend, or import its GLB. Do not instance source collections together with joined objects. Foundation is opt-in below-ground geometry.",
  "validation_method": "Shell-level Blender bmesh checks: all edges and vertices manifold, contiguous winding, positive signed volume per connected shell; zero-area faces and degenerate loop triangles rejected. Decoded GLB POSITION/NORMAL/index buffers checked for finite positions, unit normals, valid indices, zero degenerate triangles and agreement of face winding with vertex normals. Export also checked for one mesh, embedded data, triangle count, and backface culling. Components intersect intentionally; no boolean-union or inter-component intersection-free certification.",
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      "base_color_srgb": "#E4DAC4",
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      "doubleSided": false
    },
    {
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    {
      "name": "Reveal_Shadow",
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      "name": "Stone_Base",
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    {
      "name": "Roof_Terracotta",
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    {
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      "name": "Roof_Slate",
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    {
      "name": "Roof_Membrane",
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  ],
  "preview": {
    "file": "preview.png",
    "individual_files": [
      "preview-house.png",
      "preview-slab.png",
      "preview-midrise.png",
      "preview-midrise-wide.png"
    ],
    "engine": "Cycles",
    "device": "CPU",
    "samples": 48,
    "contact_sheet_size_px": [
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      1080
    ],
    "note": "Three independently framed actual camera renders; panel scales differ to show architecture."
  },
  "limits": [
    "First reusable asset prototype; not a whole-city model or surveyed architecture.",
    "Joined meshes contain intersecting but individually closed solids, not a boolean-unioned interior model.",
    "Opaque tinted PBR glazing avoids alpha sorting and interior dependencies.",
    "No textures or external downloads. Material names are shared across all archetypes and LODs.",
    "No Cesium/runtime integration, terrain seating, or georeferencing is performed by this script."
  ],
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