{
  "params": {
    "style": {
      "type": "choice",
      "options": [
        "sarsen",
        "menhir",
        "recumbent"
      ],
      "default": "sarsen",
      "label": "Style",
      "describe": "sarsen (dressed rectangular uprights with lintels and an inner horseshoe of five trilithons, like the most famous English henge), menhir (a ring of rough unshaped stones of uneven height) or recumbent (a Scottish-style ring rising to one huge horizontal slab flanked by the two tallest stones)."
    },
    "count": {
      "type": "range",
      "min": 6,
      "max": 30,
      "step": 1,
      "default": 20,
      "label": "Stones",
      "describe": "Number of stones in the ring (the sarsen style adds its five inner trilithons and heel stone on top of this)."
    },
    "radius": {
      "type": "range",
      "min": 4,
      "max": 16,
      "step": 0.5,
      "default": 10,
      "label": "Radius",
      "describe": "Radius of the ring in metres. The famous sarsen ring is about 15 m; many menhir rings are 5 to 10 m. Stones get narrower when packed closely."
    },
    "ruin": {
      "type": "range",
      "min": 0,
      "max": 1,
      "step": 0.05,
      "default": 0.3,
      "label": "Ruin",
      "describe": "0 is as built. Higher values lean stones over, topple them flat, remove some entirely and drop lintels to the ground. 0.3 to 0.5 is how most survive today."
    },
    "seed": {
      "type": "range",
      "min": 1,
      "max": 60,
      "step": 1,
      "default": 8,
      "label": "Seed",
      "describe": "Reshuffles the shape, height, shade and lichen of every stone and which ones have fallen."
    }
  },
  "presets": {
    "great henge": {
      "style": "sarsen",
      "count": 30,
      "radius": 15,
      "ruin": 0.45,
      "seed": 8
    },
    "highland ring": {
      "style": "recumbent",
      "count": 11,
      "radius": 8,
      "ruin": 0.15,
      "seed": 21
    },
    "moorland menhirs": {
      "style": "menhir",
      "count": 14,
      "radius": 9,
      "ruin": 0.35,
      "seed": 4
    }
  },
  "night": null
}