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(svn r26998) -Change: account for the map size when determining the maximum height of the landscape; a 24 high mountain at 64x64 leaves barely any usable space, but on a 4096x4096 it's just a "small" bump (ic111)

release/1.5
rubidium 2014-10-12 10:55:49 +00:00
parent 92553c9c6b
commit caf3bda626
1 changed files with 31 additions and 10 deletions
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41
src/tgp.cpp
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@ -226,13 +226,34 @@ static const amplitude_t _amplitudes_by_smoothness_and_frequency[4][TGP_FREQUENC
/** Desired water percentage (100% == 1024) - indexed by _settings_game.difficulty.quantity_sea_lakes */
static const amplitude_t _water_percent[4] = {20, 80, 250, 400};
/** Desired maximum height - indexed by _settings_game.difficulty.terrain_type */
static const int8 _max_height[4] = {
6, ///< Very flat
9, ///< Flat
12, ///< Hilly
15, ///< Mountainous
};
/**
* Gets the maximum allowed height while generating a map based on
* mapsize, terraintype, and the maximum height level.
* @return The maximum height for the map generation.
*/
static height_t TGPGetMaxHeight()
{
/**
* Desired maximum height - indexed by:
* - _settings_game.difficulty.terrain_type
* - min(MapLogX(), MapLogY()) - MIN_MAP_SIZE_BITS
*
* It is indexed by map size as well as terrain type since the map size limits the height of
* a usable mountain. For example, on a 64x64 map a 24 high single peak mountain (as if you
* raised land 24 times in the center of the map) will leave only a ring of about 10 tiles
* around the mountain to build on. On a 4096x4096 map, it won't cover any major part of the map.
*/
static const int max_height[4][MAX_MAP_SIZE_BITS - MIN_MAP_SIZE_BITS + 1] = {
/* 64 128 256 512 1024 2048 4096 */
{ 3, 3, 5, 5, 5, 5, 5 }, ///< Very flat
{ 4, 4, 6, 10, 10, 10, 10 }, ///< Flat
{ 6, 9, 15, 25, 31, 31, 31 }, ///< Hilly
{ 7, 12, 23, 42, 78, 85, 85 }, ///< Mountainous
};
int max_height_from_table = max_height[_settings_game.difficulty.terrain_type][min(MapLogX(), MapLogY()) - MIN_MAP_SIZE_BITS];
return I2H(min(max_height_from_table, _settings_game.construction.max_heightlevel));
}
/**
* Check if a X/Y set are within the map.
@ -623,7 +644,7 @@ static void HeightMapAdjustWaterLevel(amplitude_t water_percent, height_t h_max_
* Transform the height map into new (normalized) height map:
* values from range: h_min..h_water_level will become negative so it will be clamped to 0
* values from range: h_water_level..h_max are transformed into 0..h_max_new
* where h_max_new is 4, 8, 12 or 16 depending on terrain type (very flat, flat, hilly, mountains)
* where h_max_new is depending on terrain type and map size.
*/
FOR_ALL_TILES_IN_HEIGHT(h) {
/* Transform height from range h_water_level..h_max into 0..h_max_new range */
@ -800,7 +821,7 @@ static void HeightMapNormalize()
{
int sea_level_setting = _settings_game.difficulty.quantity_sea_lakes;
const amplitude_t water_percent = sea_level_setting != (int)CUSTOM_SEA_LEVEL_NUMBER_DIFFICULTY ? _water_percent[sea_level_setting] : _settings_game.game_creation.custom_sea_level * 1024 / 100;
const height_t h_max_new = I2H(_max_height[_settings_game.difficulty.terrain_type]);
const height_t h_max_new = TGPGetMaxHeight();
const height_t roughness = 7 + 3 * _settings_game.game_creation.tgen_smoothness;
HeightMapAdjustWaterLevel(water_percent, h_max_new);
@ -932,7 +953,7 @@ void GenerateTerrainPerlin()
for (int x = 0; x < _height_map.size_x; x++) MakeVoid(x);
}
int max_height = _settings_game.construction.max_heightlevel;
int max_height = H2I(TGPGetMaxHeight());
/* Transfer height map into OTTD map */
for (int y = 0; y < _height_map.size_y; y++) {