fov

kiln-core/src/map_file.rs

@@ -64,6 +64,17 @@ pub struct MapHeader {
     /// Name of the board-level script in the `[scripts]` table, if any.
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub board_script_name: Option<String>,
+    /// When `true`, this is a "dark" board: front-ends reveal only cells within
+    /// the player's field of view. Absent ⇒ `false` (fully lit); omitted from
+    /// the saved TOML when `false`. See [`Board::dark`](crate::board::Board::dark).
+    #[serde(default, skip_serializing_if = "is_false")]
+    pub dark: bool,
+}
+
+/// serde `skip_serializing_if` predicate: omit a `bool` field when it is `false`
+/// (so the common non-dark board doesn't emit a `dark = false` line).
+fn is_false(b: &bool) -> bool {
+    !*b
 }
 
 /// Serde form of the board floor attribute (`floor = { … }` in `[map]`).
@@ -401,6 +412,7 @@ impl TryFrom<MapFile> for Board {
             next_object_id,
             portals,
             board_script_name: mf.map.board_script_name,
+            dark: mf.map.dark,
             load_errors,
             registry: HashMap::new(),
         };
@@ -671,6 +683,7 @@ impl From<&Board> for MapFile {
                 height: board.height,
                 floor: floor_to_spec(&board.floor),
                 board_script_name: board.board_script_name.clone(),
+                dark: board.dark,
             },
             grid,
             triggers,