{
  "version": "v2",
  "parameters": {
    "venue": "Kanagawa Prefectural Music Hall / ground-floor foyer only",
    "short_bays_m": [
      6.8,
      6.8
    ],
    "model_length_m": 30.6,
    "length_status": "Inferred from scaled official ground-floor plan; end entrance zones included",
    "main_installation_zone_y_m": [
      4.2,
      26.4
    ],
    "central_column_pitch_m": 4.534,
    "end_column_pitch_m": 2.265,
    "main_structural_length_m": 27.2,
    "height_glazing_side_m": 5.7,
    "height_hall_side_m": 3.1,
    "height_central_columns_m": 4.5032,
    "ceiling_profile_status": "Short window-side strip approximately level, then rake down toward hall. Heights estimated from scaled 2019 architect section and photos, not dimension-labelled.",
    "height_status": "Read approximately from the 10 m scale in 2019 architect seminar section; not dimension-labelled or surveyed",
    "section_source": "assets/references/venue/v2/maekawa_seminar_2019.pdf p7, 10 m graphic scale",
    "audience_count": 23,
    "dancer_count": 1,
    "exciter_count": 65,
    "exciter_status": "24 independent resonator panels + 3 instruments + 16 column-mounted + 16 suspended metal cylinder-mounted + 6 locker-mounted; proposed visual placement, not approved installation",
    "parametric_mini_count": 6,
    "parametric_panel_count": 2,
    "parametric_panel_status": "Generic board-style array proxy, 350 x 230 x 25 mm, not an exact Audfly Model B CAD model",
    "exciter_model_status": "62 DAEX25FHE-4 outer-envelope proxies; 3 instrument exciters simplified, violin uses a smaller generic proxy",
    "cpl4050_count": 2,
    "dcp100_count": 1,
    "amplifier_status": "Illustrative equipment proxy quantities only; not a channel allocation or wiring design",
    "live_foyer_musician_count": 0,
    "balloon_count": 90,
    "original_balloon_count": 30,
    "added_ceiling_balloon_count": 60,
    "version": "v2",
    "exciter_counts_by_host": {
      "independent_boards": 24,
      "instruments": 3,
      "columns": 16,
      "metal_cylinders": 16,
      "lockers": 6
    },
    "locker_compartment_count": 50,
    "locker_cabinet_layout": [
      {
        "columns": 2,
        "rows": 5
      },
      {
        "columns": 4,
        "rows": 5
      },
      {
        "columns": 4,
        "rows": 5
      }
    ],
    "locker_inside_dimensions_m": [
      0.35,
      0.3,
      0.42
    ],
    "locker_outer_height_m": 1.7,
    "locker_outer_status": "Inferred cabinet envelope from 2026 photos; internal dimensions documented by venue",
    "suspended_metal_cylinder_count": 8,
    "suspended_metal_cylinder_dimensions_m": {
      "diameter": 0.18,
      "height": 0.95
    },
    "suspended_metal_cylinder_status": "Observed vertical silver fixture, function unverified; likely lighting, not asserted to be a duct. Count, position and dimensions visually inferred",
    "stairs_status": "Two end stairs now oriented about 90 degrees apart, following plan and 2024 photos",
    "bench_status": "2017 circular benches removed; current 2024 rectangular window-side benches reconstructed",
    "hall_wall_status": "Repeated invented wood doors removed; green wall, paired circular vents, one shutter, white north WC entry, counters and 50 lockers follow 2024/2026 photographs",
    "gltf_coordinates": "Blender X,Y,Z maps to glTF X,Z,-Y; scene bounds glTF x0..13.6 y0..5.7 z-30.6..0",
    "source_photo": "assets/references/venue/v2/foyer_2019_nagata.jpg",
    "secondary_photo_sources": [
      "assets/references/venue/v2/foyer_2024_entry_wide.jpg",
      "assets/references/venue/v2/foyer_2024_stair_overlook.jpg",
      "assets/references/venue/v2/foyer_2024_stair_vending.jpg",
      "assets/references/venue/v2/cylinders_ceiling_2026_artdiary.jpg",
      "assets/references/venue/v2/locker_wall_2026_artdiary.jpg"
    ],
    "source_plan": "assets/references/venue/official_building_plans.pdf",
    "caveat": "Concept reconstruction, not a measured building model, construction plan, or acoustic simulation.",
    "column_positions_y_m": [
      1.7,
      3.965,
      8.499,
      13.033,
      17.567,
      22.101,
      26.635,
      28.9
    ],
    "column_position_status": "Traced from official plan; principal dimension text tentatively read as4534mm, end2265mm. Main axis27.2m fits arithmetic. Placement offset1.7m within approximate30.6m length; not measured.",
    "ceiling_balloon_positions_blender_m": [
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    "locker_bank_centres_blender_m": [
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    "axis_orientation": "Blender +Y runs from main entrance / transverse stair3 to north vending / longitudinal stair4; X0 glazed facade, X13.6 green wall",
    "permanent_fixture_order_entrance_to_north": [
      "timber counter",
      "timber counter",
      "green roll shutter",
      "20 lockers",
      "20 lockers",
      "drinking fountain",
      "10 lockers",
      "white WC entry and north stair4"
    ],
    "timber_counter_centres_y_m": [
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    ],
    "green_shutter_centre_y_m": 10.766,
    "north_wc_entry_centre_y_m": 27.7675,
    "layout_correction_basis": "Official north-vending location + official plan stairs3/4 + Nagata2019 and2024 photographs. Permanent fixtures reflected consistently; proposed exhibition positions retained.",
    "daylight_reference": "Nagata2019 foyer photograph: neutral concrete, direct daylight through glazed facade, floor bounce; render is proposal lighting.",
    "preset_coordinates": "Blender metres Z-up; convert [x,y,z] to glTF [x,z,-y]",
    "geometry_count_audit": {
      "original_balloons": 30,
      "added_ceiling_balloons": 60,
      "column_exciters": 16,
      "metal_cylinder_exciters": 16,
      "locker_exciters": 6,
      "independent_board_exciters": 24,
      "instrument_exciters": 3,
      "locker_compartments": 50,
      "audience": 23,
      "dancers": 1
    }
  },
  "presets": [
    {
      "id": "overview",
      "label": "全体を見渡す",
      "position": [
        31,
        -25,
        24
      ],
      "target": [
        6.8,
        15.3,
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      ]
    },
    {
      "id": "walk",
      "label": "ホワイエに立つ",
      "position": [
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        1.72
      ],
      "target": [
        8.7,
        17.6,
        2.4
      ]
    },
    {
      "id": "ceiling",
      "label": "天井の風船と銀色円筒",
      "position": [
        10.3,
        7.1,
        2.3
      ],
      "target": [
        5.4,
        18,
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      ]
    },
    {
      "id": "lockers",
      "label": "ロッカーの振動スピーカー",
      "position": [
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      ],
      "target": [
        13.14,
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    },
    {
      "id": "counters",
      "label": "木製カウンターは入口側",
      "position": [
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        4.35,
        1.5
      ],
      "target": [
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      ]
    },
    {
      "id": "columns",
      "label": "柱の振動スピーカー",
      "position": [
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      ],
      "target": [
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    },
    {
      "id": "cylinders",
      "label": "銀色円筒への取付案",
      "position": [
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      ],
      "target": [
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      ]
    }
  ]
}