{
  "units": "m",
  "axes": "x桥向 / y横向 / z向上",
  "spans": [
    30,
    30
  ],
  "width": 12,
  "girderY": [
    -4.8,
    -2.4,
    0,
    2.4,
    4.8
  ],
  "girderTop": 8.8,
  "girderBottom": 7,
  "web": 0.22,
  "flange": 2.4,
  "flangeThickness": 0.2,
  "bottomWidth": 0.65,
  "bottomThickness": 0.24,
  "pavementThickness": 0.12,
  "camera": {
    "verticalFov": 70,
    "aspect": 1.7777777777777777,
    "near": 0.05,
    "far": 70
  },
  "droneEnvelope": [
    1.31,
    1.31,
    0.52
  ],
  "scope": "五片连续T梁的教学模型；2×30m支点中心距，不是实桥复原",
  "stationCount": 190,
  "routeNodes": 219,
  "sampling": {
    "sampleCount": 3170,
    "visible": 3082,
    "overlap": 2536,
    "excludedContactOrBuried": 302,
    "stationCount": 190,
    "bySurface": {
      "梁底": {
        "total": 450,
        "visible": 450,
        "overlap": 450
      },
      "腹板": {
        "total": 852,
        "visible": 832,
        "overlap": 524
      },
      "翼缘底面": {
        "total": 852,
        "visible": 852,
        "overlap": 848
      },
      "马蹄": {
        "total": 300,
        "visible": 300,
        "overlap": 260
      },
      "桥面": {
        "total": 180,
        "visible": 180,
        "overlap": 144
      },
      "附属与下部": {
        "total": 536,
        "visible": 468,
        "overlap": 310
      }
    }
  },
  "rendering": "相机视场与覆盖计算共用70°垂直视角、16:9比例；右视窗等比例留边；无人机与视场图形仅在全桥视窗绘制",
  "limits": "无实桥定位、风场、飞控、碰撞动力学或裂缝检出模拟；路线净空仅按该教学模型及给定包络核验"
}