diff options
| -rw-r--r-- | src/heightmap.cpp | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/heightmap.cpp b/src/heightmap.cpp index 93cfa0a62..acbb202e2 100644 --- a/src/heightmap.cpp +++ b/src/heightmap.cpp @@ -364,8 +364,16 @@ static void GrayscaleToMapHeights(uint img_width, uint img_height, byte *map) assert(img_row < img_height); assert(img_col < img_width); - /* Colour scales from 0 to 255, OpenTTD height scales from 0 to 15 */ - SetTileHeight(tile, map[img_row * img_width + img_col] / 16); + /* The height in 1/255ths. */ + uint heightmap_height = map[img_row * img_width + img_col]; + + /* The height in 1/255ths of the maximum height. */ + heightmap_height *= _settings_game.construction.max_heightlevel; + + /* Scaling should not alter the coastline, thus values in the interval ]0..1] result in a heightlevel of 1 */ + if (IsInsideMM(heightmap_height, 1, UINT8_MAX)) heightmap_height = UINT8_MAX; + + SetTileHeight(tile, heightmap_height / UINT8_MAX); } /* Only clear the tiles within the map area. */ if (IsInnerTile(tile)) { |