{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "Wall.schema.json",
  "title": "Wall",
  "x-merge": "Map",
  "type": "object",
  "description": "One segment chain of a `Map`'s vision and movement mesh.\n\nWalls are what make line of sight work: each is a polyline whose `type` says whether it stops\nvision, movement, or both. Doors additionally carry a `door` state that can change during\nplay, so opening one changes what the party can see.\n\nUnlike the other map objects a wall is a plain `Codable` value, not a Realm object \u2014 the whole\nmesh is stored encoded in `Map/walls` because a detailed map carries thousands of segments\nand they are always loaded together. The derived geometry (`points`, `path`, `hitPath`,\nwall segments) is cached and must be discarded with `invalidate()` after editing `data`.\n\n- SeeAlso: `Map/walls`, `Map/lineOfSight`, `WallType`",
  "properties": {
    "id": {
      "type": "string",
      "description": "The unique identifier for this wall.\n\nA UUID string generated when the wall is created."
    },
    "data": {
      "type": "array",
      "items": {
        "type": "number"
      },
      "description": "The wall's vertices, as a flat list of alternating x and y coordinates.\n\nStored flat rather than as points to keep the encoded mesh compact.\n\n## Examples\n- `[100, 200, 340, 200]` \u2014 a single segment from (100, 200) to (340, 200)\n\n- Note: Edit through `update(_:)`, which also invalidates the cached geometry.\n- SeeAlso: `points`"
    },
    "color": {
      "type": "string",
      "description": "An override for the color the wall is drawn in while editing.\n\nDefaults to the color of its `type` when absent."
    },
    "type": {
      "$ref": "WallType.schema.json",
      "description": "What this wall blocks.\n\n`nil` behaves as `WallType/normal`.\n\n- SeeAlso: `WallType`"
    },
    "side": {
      "$ref": "#/$defs/Side",
      "description": "Which side of the wall blocks; `nil` behaves as `Side/both`."
    },
    "door": {
      "$ref": "#/$defs/DoorState",
      "description": "The door's state, for walls of type `WallType/door` or `WallType/secretDoor`.\n\n- SeeAlso: `DoorState`"
    },
    "generated": {
      "type": "boolean",
      "description": "Whether this wall was produced by automatic wall detection rather than drawn by hand.\n\nLets generated walls be cleared in bulk without disturbing the user's own."
    }
  },
  "required": [
    "id",
    "data"
  ],
  "additionalProperties": false,
  "$defs": {
    "Side": {
      "title": "Side",
      "description": "Which side of a wall blocks.\n\nA one-sided wall lets a creature see out but not in \u2014 useful for balconies, cliff edges and\none-way windows.",
      "type": "string",
      "enum": [
        "both",
        "left",
        "right"
      ]
    },
    "DoorState": {
      "title": "DoorState",
      "description": "The state of a door wall.",
      "type": "string",
      "enum": [
        "closed",
        "open",
        "locked"
      ]
    }
  }
}