src/landscape.cpp, src/tile_map.h: fix bug which makes assert fail

2 files changed, 20 insertions, 12 deletions

diff --git a/src/landscape.cpp b/src/landscape.cpp
index b921deef2..ac9040e16 100644
--- a/src/landscape.cpp
+++ b/src/landscape.cpp
@@ -35,6 +35,7 @@
 #include <array>
 #include <list>
 #include <set>
+#include "layer_func.h"
 
 #include "table/strings.h"
 #include "table/sprites.h"
@@ -835,17 +836,23 @@ void RunTileLoop()
 
 void InitializeLandscape()
 {
-	for (uint y = _settings_game.construction.freeform_edges ? 1 : 0; y < MapMaxY(); y++) {
-		for (uint x = _settings_game.construction.freeform_edges ? 1 : 0; x < MapMaxX(); x++) {
-			MakeClear(TileXY(x, y), CLEAR_GRASS, 3);
-			SetTileHeight(TileXY(x, y), 0);
-			SetTropicZone(TileXY(x, y), TROPICZONE_NORMAL);
-			ClearBridgeMiddle(TileXY(x, y));
+	uint maxx = LayerMaxX();
+	uint maxy = LayerMaxY();
+	uint sizex = MapSizeX();
+	uint layersize = LayerSize();
+
+	FOR_ALL_LAYERS(layer) {
+		for (uint y = _settings_game.construction.freeform_edges ? 1 : 0; y < LayerMaxY(); y++) {
+			for (uint x = _settings_game.construction.freeform_edges ? 1 : 0; x < LayerMaxX(); x++) {
+				MakeClear(layer * layersize + TileXY(x, y), CLEAR_GRASS, 3);
+				SetTileHeight(layer * layersize + TileXY(x, y), 0);
+				SetTropicZone(layer * layersize + TileXY(x, y), TROPICZONE_NORMAL);
+				ClearBridgeMiddle(layer * layersize + TileXY(x, y));
+			}
+			MakeVoid(layer * layersize + TileXY(LayerMaxX(), y));
 		}
+		for (uint x = 0; x < LayerSizeX(); x++) MakeVoid(TileXY(x, LayerMaxY()));
 	}
-
-	for (uint x = 0; x < MapSizeX(); x++) MakeVoid(TileXY(x, MapMaxY()));
-	for (uint y = 0; y < MapSizeY(); y++) MakeVoid(TileXY(MapMaxX(), y));
 }
 
 static const byte _genterrain_tbl_1[5] = { 10, 22, 33, 37, 4  };
diff --git a/src/tile_map.h b/src/tile_map.h
index 4bd584539..c191ab904 100644
--- a/src/tile_map.h
+++ b/src/tile_map.h
@@ -14,6 +14,7 @@
 #include "map_func.h"
 #include "core/bitmath_func.hpp"
 #include "settings_type.h"
+#include "layer_func.h"
 
 /**
  * Returns the height of a tile
@@ -110,10 +111,10 @@ static inline bool IsInnerTile(TileIndex tile)
 {
 	assert(tile < MapSize());
 
-	uint x = TileX(tile);
-	uint y = TileY(tile);
+	uint x = LayerX(tile);
+	uint y = LayerY(tile);
 
-	return x < MapMaxX() && y < MapMaxY() && ((x > 0 && y > 0) || !_settings_game.construction.freeform_edges);
+	return x < LayerMaxX() && y < LayerMaxY() && ((x > 0 && y > 0) || !_settings_game.construction.freeform_edges);
 }
 
 /**