{
  "params": {
    "cab": {
      "type": "choice",
      "options": [
        "long nose",
        "cab over"
      ],
      "default": "long nose",
      "label": "Cab",
      "describe": "long nose (American-style conventional with a long hood) or cab over (European flat-front cab sitting over the engine)."
    },
    "paint": {
      "type": "choice",
      "options": [
        "red",
        "blue",
        "white",
        "black",
        "green",
        "orange"
      ],
      "default": "red",
      "label": "Paint",
      "describe": "Tractor colour: red, blue, white, black, green or orange. Chrome grille, tanks and stacks either way."
    },
    "trailer": {
      "type": "toggle",
      "default": true,
      "label": "Trailer",
      "describe": "Couple the 13.6 m box trailer. Off shows the tractor unit alone (bobtail) with its fifth wheel visible."
    },
    "trailerPaint": {
      "type": "choice",
      "options": [
        "white",
        "silver",
        "red",
        "blue",
        "reefer white"
      ],
      "default": "white",
      "label": "Trailer colour",
      "describe": "Box trailer colour: white, silver (aluminium), red, blue, or reefer white (refrigerated trailer with a front cooling unit)."
    },
    "hitch": {
      "type": "range",
      "min": -45,
      "max": 45,
      "step": 5,
      "default": 0,
      "label": "Hitch angle",
      "describe": "Trailer angle on the kingpin in degrees, as when turning: positive swings the trailer tail to the left (+X), negative to the right."
    }
  },
  "presets": {
    "highway hauler": {
      "cab": "long nose",
      "paint": "red"
    },
    "european artic": {
      "cab": "cab over",
      "paint": "blue",
      "trailerPaint": "silver"
    },
    "reefer in a turn": {
      "cab": "long nose",
      "paint": "white",
      "trailerPaint": "reefer white",
      "hitch": 25
    }
  },
  "night": {
    "headlight": {
      "zone": "headlight",
      "color": "#fff4c8",
      "intensity": 1.2,
      "describe": "Headlights glow."
    },
    "taillight": {
      "zone": "taillight",
      "color": "#ff2a2a",
      "intensity": 1,
      "describe": "Tail lights glow red."
    },
    "marker": {
      "zone": "marker",
      "color": "#ffad2e",
      "intensity": 1.5,
      "describe": "Amber marker lights on the cab roof and along the trailer glow."
    }
  }
}