{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "description": "Reproducing http://robslink.com/SAS/democd91/pyramid_pie.htm",
  "background": "white",
  "padding": 5,
  "width": 200,
  "height": 200,
  "data": [
    {
      "name": "source_0",
      "values": [
        {"category": "Sky", "value": 75, "order": 3},
        {"category": "Shady side of a pyramid", "value": 10, "order": 1},
        {"category": "Sunny side of a pyramid", "value": 15, "order": 2}
      ]
    },
    {
      "name": "data_0",
      "source": "source_0",
      "transform": [
        {
          "type": "stack",
          "groupby": [],
          "field": "value",
          "sort": {"field": ["order"], "order": ["ascending"]},
          "as": ["value_start", "value_end"],
          "offset": "zero"
        },
        {
          "type": "filter",
          "expr": "isValid(datum[\"value\"]) && isFinite(+datum[\"value\"])"
        }
      ]
    }
  ],
  "marks": [
    {
      "name": "marks",
      "type": "arc",
      "style": ["arc"],
      "from": {"data": "data_0"},
      "encode": {
        "update": {
          "outerRadius": {"value": 80},
          "fill": {"scale": "color", "field": "category"},
          "description": {
            "signal": "\"value: \" + (format(datum[\"value\"], \"\")) + \"; category: \" + (isValid(datum[\"category\"]) ? datum[\"category\"] : \"\"+datum[\"category\"]) + \"; order: \" + (isValid(datum[\"order\"]) ? datum[\"order\"] : \"\"+datum[\"order\"])"
          },
          "x": {"signal": "width", "mult": 0.5},
          "y": {"signal": "height", "mult": 0.5},
          "innerRadius": {"value": 0},
          "startAngle": {"scale": "theta", "field": "value_end"},
          "endAngle": {"scale": "theta", "field": "value_start"}
        }
      }
    }
  ],
  "scales": [
    {
      "name": "theta",
      "type": "linear",
      "domain": {"data": "data_0", "fields": ["value_start", "value_end"]},
      "range": [2.35619449, 8.639379797],
      "zero": true
    },
    {
      "name": "color",
      "type": "ordinal",
      "domain": ["Sky", "Shady side of a pyramid", "Sunny side of a pyramid"],
      "range": ["#416D9D", "#674028", "#DEAC58"]
    }
  ],
  "legends": [
    {
      "columns": 1,
      "legendX": 200,
      "legendY": 80,
      "orient": "none",
      "fill": "color",
      "symbolType": "circle"
    }
  ]
}