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-rw-r--r--src/newgrf_spritegroup.h7
1 files changed, 4 insertions, 3 deletions
diff --git a/src/newgrf_spritegroup.h b/src/newgrf_spritegroup.h
index b6dc71d62..d1c13ca43 100644
--- a/src/newgrf_spritegroup.h
+++ b/src/newgrf_spritegroup.h
@@ -349,9 +349,10 @@ struct ResolverObject {
bool upper_halftile; ///< Are we resolving sprites for the upper halftile?
} routes;
struct {
- const struct Station *st;
- byte airport_id;
- TileIndex tile;
+ const struct Station *st; ///< Station of the airport for which the callback is run, or NULL for build gui.
+ byte airport_id; ///< Type of airport for which the callback is run
+ byte layout; ///< Layout of the airport to build.
+ TileIndex tile; ///< Tile for the callback, only valid for airporttile callbacks.
} airport;
} u;