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Feature: setting to indicate snow coverage for arctic climate (replaces snow line height)

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Setting the snow coverage (in % of the map) makes a lot more sense
to the human, while still allowing the niche player to set (by
finding the correct %) a snow line height they like. This makes for
easier defaults, as it decoupled terrain height from amount of snow.

Maps can never be 100% snow, as we do not have sprites for coastal
tiles.

Internally, this calculates the best snow line height to approach
this coverage as close as possible.
This commit is contained in:
Patric Stout
2021-03-24 14:48:12 +01:00
committed by Patric Stout
parent 7a886cb4d4
commit cafe4eed6e
12 changed files with 124 additions and 56 deletions
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8
src/tgp.cpp
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@@ -237,14 +237,6 @@ static height_t TGPGetMaxHeight()
int map_size_bucket = std::min(MapLogX(), MapLogY()) - MIN_MAP_SIZE_BITS;
int max_height_from_table = max_height[_settings_game.difficulty.terrain_type][map_size_bucket];
/* Arctic needs snow to have all industries, so make sure we allow TGP to generate this high. */
if (_settings_game.game_creation.landscape == LT_ARCTIC) {
max_height_from_table += _settings_newgame.game_creation.snow_line_height;
/* Make flat a bit more flat by removing "very flat" from it, to somewhat compensate for the increase we just did. */
if (_settings_game.difficulty.terrain_type > 0) {
max_height_from_table -= max_height[_settings_game.difficulty.terrain_type - 1][map_size_bucket];
}
}
/* Tropic needs tropical forest to have all industries, so make sure we allow TGP to generate this high.
* Tropic forest always starts at 1/4th of the max height. */
if (_settings_game.game_creation.landscape == LT_TROPIC) {