{
    "name": "root",
    "globalData": {
      "ambientCoeff": 0.5,
      "diffuseCoeff": 0.5,
      "specularCoeff": 0.5,
      "transparentCoeff": 0
    },
    "cameraData": {
      "position": [-3, -3, -3],
      "up": [0, 1, 0],
      "heightAngle": 30,
      "focus": [0, 0, 0]
    },
    "groups": [
      {
        "name": "root",
        "lights": [
          {
            "type": "directional",
            "color": [1, 1, 1],
            "direction": [10, 3, 0]
          }
        ],
        "primitives": [
          {
            "type": "cone",
            "diffuse": [1, 0, 0],
            "specular": [1, 1, 1],
            "shininess": 25
          }
        ]
      }
    ]
  }