# `AshNeo4j.Type.Box`
[🔗](https://github.com/diffo-dev/ash_neo4j/blob/v0.7.0/lib/type/box.ex#L5)

Ash type for an axis-aligned bounding box. v1 supports WGS-84 2D only.

A Box is two `%Bolty.Types.Point{}` corners — `sw` (south-west, lower-left)
and `ne` (north-east, upper-right) — matching Neo4j's `point.withinBBox`
signature exactly.

Stored on the node as a 4-Point vertex array `[sw, se, ne, nw]` (CCW from
SW per GeoJSON convention), plus 4 scalar Point companion properties
(`<prop>.bbSW`, `<prop>.bbSE`, `<prop>.bbNE`, `<prop>.bbNW`) written by
the data layer for indexed bounding-box queries. The same on-disk shape
will be used by `AshNeo4j.Type.Polygon` when it lands — a Box is a
4-vertex straight-sided polygon that happens to be axis-aligned. No
data migration when Polygon ships.

    attribute :bounds, AshNeo4j.Type.Box

    Place |> Ash.create!(%{
      name: "Sydney bbox",
      bounds: %AshNeo4j.Type.Box{
        sw: Bolty.Types.Point.create(:wgs_84, 151.0, -34.0),
        ne: Bolty.Types.Point.create(:wgs_84, 151.5, -33.5)
      }
    })

Antimeridian-crossing boxes (where `sw.x > ne.x`) are rejected in v1.
See [ash_neo4j#45](https://github.com/diffo-dev/ash_neo4j/issues/45).

# `t`

```elixir
@type t() :: %AshNeo4j.Type.Box{ne: Bolty.Types.Point.t(), sw: Bolty.Types.Point.t()}
```

# `companions`

Derives the 4 scalar bbox companion properties (`bbSW`, `bbSE`, `bbNE`, `bbNW`)
from a dumped 4-Point array. Called by the data layer's runtime property
assembly to write companion properties alongside the main vertex array.
Same shape that Polygon will use — for Box the companions are the polygon
vertices themselves.

# `handle_change?`

# `prepare_change?`

---

*Consult [api-reference.md](api-reference.md) for complete listing*