{
  "params": {
    "material": {
      "type": "choice",
      "options": [
        "wood",
        "metal",
        "stone"
      ],
      "default": "wood",
      "label": "Material",
      "describe": "wood (planks with iron bands on two skids), metal (round-ended galvanised stock tank with a rolled rim), stone (heavy hewn granite with a touch of moss)."
    },
    "length": {
      "type": "range",
      "min": 1.2,
      "max": 3,
      "step": 0.1,
      "default": 2,
      "label": "Length",
      "describe": "Trough length in metres along X. It is about 0.7 m wide and 0.6 m tall."
    },
    "pump": {
      "type": "choice",
      "options": [
        "red",
        "green",
        "black",
        "none"
      ],
      "default": "green",
      "label": "Pump",
      "describe": "Paint of the hand pump at the right-hand end: red, green or black cast iron, or none for a plain trough."
    },
    "water": {
      "type": "range",
      "min": 0,
      "max": 1,
      "step": 0.05,
      "default": 0.85,
      "label": "Water",
      "describe": "Water level, 0 empty to 1 brimming."
    }
  },
  "presets": {
    "stable trough": {
      "material": "wood",
      "pump": "red"
    },
    "stock tank": {
      "material": "metal",
      "length": 2.6,
      "pump": "none"
    },
    "village fountain": {
      "material": "stone",
      "length": 1.6,
      "pump": "black"
    }
  },
  "night": null
}