Index: src/heightmap.cpp
===================================================================
--- src/heightmap.cpp (revision 27039)
+++ src/heightmap.cpp (working copy)
@@ -364,16 +364,16 @@
assert(img_row < img_height);
assert(img_col < img_width);
- /* The height in 1/256ths. */
uint heightmap_height = map[img_row * img_width + img_col];
- /* The height in 1/256ths of the maximum height. */
- heightmap_height *= (1 + _settings_game.construction.max_heightlevel);
+ if (heightmap_height > 0) {
+ /* 0 is sea level.
+ * Other grey scales are scaled evenly to the availble height levels > 0.
+ * (The coastline is independent from the number of height levels) */
+ heightmap_height = 1 + (heightmap_height - 1) * _settings_game.construction.max_heightlevel / 255;
+ }
- /* Scaling should not alter the coastline, thus values in the interval ]0..1] result in a heightlevel of 1 */
- if (IsInsideMM(heightmap_height, 1, 256)) heightmap_height = 256;
-
- SetTileHeight(tile, heightmap_height / 256);
+ SetTileHeight(tile, heightmap_height);
}
/* Only clear the tiles within the map area. */
if (IsInnerTile(tile)) {