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Feature: setting to indicate desert coverage for tropic climate

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This is an indication value; the game tries to get as close as it
can, but due to the complex tropic rules, that is unlikely to be
exact.

In the end, it picks a height-level to base the desert/tropic
line on. This is strictly seen not needed, as we can convert any
tile to either. But it is the simplest way to get started with
this without redoing all related functions.
This commit is contained in:
Patric Stout
2021-03-24 16:38:36 +01:00
committed by Patric Stout
parent cafe4eed6e
commit 70bc55cfd6
9 changed files with 194 additions and 33 deletions
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11
src/tgp.cpp
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@@ -236,17 +236,6 @@ 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];
/* 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) {
max_height_from_table += CeilDiv(_settings_game.construction.max_heightlevel, 4);
/* 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];
}
}
return I2H(std::min<uint>(max_height_from_table, _settings_game.construction.max_heightlevel));
}