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-rw-r--r--src/newgrf_commons.cpp46
1 files changed, 45 insertions, 1 deletions
diff --git a/src/newgrf_commons.cpp b/src/newgrf_commons.cpp
index f95ad985c..ec4810461 100644
--- a/src/newgrf_commons.cpp
+++ b/src/newgrf_commons.cpp
@@ -17,8 +17,10 @@
#include "industrytype.h"
#include "newgrf.h"
#include "newgrf_commons.h"
+#include "clear_map.h"
#include "station_map.h"
#include "tree_map.h"
+#include "tunnelbridge_map.h"
#include "core/mem_func.hpp"
/** Constructor of generic class
@@ -284,7 +286,49 @@ uint32 GetTerrainType(TileIndex tile)
{
switch (_settings_game.game_creation.landscape) {
case LT_TROPIC: return GetTropicZone(tile);
- case LT_ARCTIC: return GetTileZ(tile) > GetSnowLine() ? 4 : 0;
+ case LT_ARCTIC: {
+ bool has_snow;
+ switch (GetTileType(tile)) {
+ case MP_CLEAR:
+ has_snow = IsSnowTile(tile);
+ break;
+
+ case MP_RAILWAY: {
+ RailGroundType ground = GetRailGroundType(tile);
+ has_snow = (ground == RAIL_GROUND_ICE_DESERT);
+ break;
+ }
+
+ case MP_ROAD:
+ has_snow = IsOnSnow(tile);
+ break;
+
+ case MP_TREES: {
+ TreeGround ground = GetTreeGround(tile);
+ has_snow = (ground == TREE_GROUND_SNOW_DESERT || ground == TREE_GROUND_ROUGH_SNOW);
+ break;
+ }
+
+ case MP_TUNNELBRIDGE:
+ has_snow = HasTunnelBridgeSnowOrDesert(tile);
+ break;
+
+ case MP_STATION:
+ case MP_HOUSE:
+ case MP_INDUSTRY:
+ case MP_UNMOVABLE:
+ /* These tiles usually have a levelling foundation. So use max Z */
+ has_snow = (GetTileMaxZ(tile) > GetSnowLine());
+ break;
+
+ case MP_WATER:
+ has_snow = (GetTileZ(tile) > GetSnowLine());
+ break;
+
+ default: NOT_REACHED();
+ }
+ return has_snow ? 4 : 0;
+ }
default: return 0;
}
}