{
  "name": "extrude",
  "type": "function",
  "groups": ["GeometryGroup"],
  "description": "Returns an extruded version of the input (Multi-)Curve or (Multi-)Linestring geometry with an extension specified by x and y.",
  "arguments": [{
    "arg": "geometry",
    "description": "a curve or linestring geometry"
  }, {
    "arg": "x",
    "description": "x extension, numeric value"
  }, {
    "arg": "y",
    "description": "y extension, numeric value"
  }],
  "examples": [{
    "expression": "geom_to_wkt(extrude(geom_from_wkt('LineString(1 2, 3 2, 4 3)'), 1, 2))",
    "returns": "'Polygon ((1 2, 3 2, 4 3, 5 5, 4 4, 2 4, 1 2))'"
  }, {
    "expression": "geom_to_wkt(extrude(geom_from_wkt('MultiLineString((1 2, 3 2), (4 3, 8 3))'), 1, 2))",
    "returns": "'MultiPolygon (((1 2, 3 2, 4 4, 2 4, 1 2)),((4 3, 8 3, 9 5, 5 5, 4 3)))'"
  }],
  "tags": ["curve", "version", "extension", "input", "specified", "extruded", "linestring", "multi"]
}