Cache current value of snow line height

2021-02-21 22:02:58 +00:00
parent f595696e97
commit 2e20da40ed
6 changed files with 29 additions and 2 deletions
--- a/src/landscape.h
+++ b/src/landscape.h
@@ -28,11 +28,18 @@ struct SnowLine {

 bool IsSnowLineSet();
 void SetSnowLine(byte table[SNOW_LINE_MONTHS][SNOW_LINE_DAYS]);
-byte GetSnowLine();
+byte GetSnowLineUncached();
+void UpdateCachedSnowLine();
 byte HighestSnowLine();
 byte LowestSnowLine();
 void ClearSnowLine();

+inline byte GetSnowLine()
+{
+	extern byte _cached_snowline;
+	return _cached_snowline;
+}
+
 int GetSlopeZInCorner(Slope tileh, Corner corner);
 Slope GetFoundationSlope(TileIndex tile, int *z = nullptr);