{
  "_note": "Newbury exhibit scene definition. All coordinates in MILLIMETRES, world origin at one corner of the baseplate. X runs along the 1500mm length, Z along the 700mm depth, Y is height above the table surface. This maps 1:1 to the physical build so measured tape values drop straight in.",
  "world": {
    "units": "mm",
    "buildSize": { "x": 1500, "y": 600, "z": 700 },
    "origin": "front-left corner of baseplate, table surface = Y0",
    "upAxis": "Y"
  },
  "anchors": [
    {
      "id": "anchor-nw",
      "label": "North-West Ward",
      "fiducialType": "apriltag",
      "fiducialId": 0,
      "fiducialSizeMm": 40,
      "position": { "x": 120, "y": 30, "z": 120 },
      "rotationDeg": { "x": 0, "y": 0, "z": 0 },
      "note": "Measure precisely once installed; these are placeholders."
    },
    {
      "id": "anchor-ne",
      "label": "North-East Ward",
      "fiducialType": "apriltag",
      "fiducialId": 1,
      "fiducialSizeMm": 40,
      "position": { "x": 1380, "y": 30, "z": 120 },
      "rotationDeg": { "x": 0, "y": 0, "z": 0 },
      "note": "Placeholder."
    },
    {
      "id": "anchor-mid",
      "label": "Town Square Ward",
      "fiducialType": "apriltag",
      "fiducialId": 2,
      "fiducialSizeMm": 40,
      "position": { "x": 750, "y": 30, "z": 350 },
      "rotationDeg": { "x": 0, "y": 0, "z": 0 },
      "note": "Placeholder, mid-span for overlap coverage."
    },
    {
      "id": "anchor-sw",
      "label": "South-West Ward",
      "fiducialType": "apriltag",
      "fiducialId": 3,
      "fiducialSizeMm": 40,
      "position": { "x": 120, "y": 30, "z": 580 },
      "rotationDeg": { "x": 0, "y": 0, "z": 0 },
      "note": "Placeholder."
    },
    {
      "id": "anchor-se",
      "label": "South-East Ward",
      "fiducialType": "apriltag",
      "fiducialId": 4,
      "fiducialSizeMm": 40,
      "position": { "x": 1380, "y": 30, "z": 580 },
      "rotationDeg": { "x": 0, "y": 0, "z": 0 },
      "note": "Placeholder."
    }
  ],
  "spawns": [
    {
      "id": "spawn-graveyard",
      "ghostId": "lil-bo-pumpkins",
      "label": "Graveyard hover",
      "motion": "hover",
      "position": { "x": 300, "y": 180, "z": 250 },
      "hoverRadiusMm": 60,
      "hoverPeriodS": 6,
      "bobAmplitudeMm": 40,
      "bobPeriodS": 3,
      "yawDegPerS": 12
    },
    {
      "id": "spawn-square-patrol",
      "ghostId": "tragico",
      "label": "Town square patrol",
      "motion": "patrol",
      "path": [
        { "x": 600, "y": 200, "z": 350 },
        { "x": 900, "y": 240, "z": 350 },
        { "x": 900, "y": 200, "z": 450 },
        { "x": 600, "y": 240, "z": 450 }
      ],
      "patrolPeriodS": 16,
      "bobAmplitudeMm": 25,
      "bobPeriodS": 2.5,
      "faceTravel": true
    },
    {
      "id": "spawn-highschool",
      "ghostId": "samuel-mason",
      "label": "High school boss anchor",
      "motion": "hover",
      "position": { "x": 1200, "y": 220, "z": 300 },
      "hoverRadiusMm": 40,
      "hoverPeriodS": 8,
      "bobAmplitudeMm": 50,
      "bobPeriodS": 3.5,
      "yawDegPerS": -8
    }
  ]
}