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Don't spread temperate trees uphill if above lower snow line in arctic

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Jonathan G Rennison
2023-07-17 23:20:22 +01:00
parent 11bf8e22d7
commit 0538ead472
1 changed files with 7 additions and 0 deletions
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7
src/tree_cmd.cpp
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@@ -978,11 +978,18 @@ static void TileLoop_Trees(TileIndex tile)
} }
} else { } else {
const TreeType tree_type = GetTreeType(tile); const TreeType tree_type = GetTreeType(tile);
const TileIndex old_tile = tile;
tile += TileOffsByDir((Direction)(Random() & 7)); tile += TileOffsByDir((Direction)(Random() & 7));
if (!CanPlantTreesOnTile(tile, false)) return; if (!CanPlantTreesOnTile(tile, false)) return;
/* Don't spread temperate trees uphill if above lower snow line in arctic */
if (_settings_game.game_creation.landscape == LT_ARCTIC && IsInsideMM(tree_type, TREE_TEMPERATE, TREE_SUB_ARCTIC)) {
const int new_z = GetTileZ(tile);
if (new_z >= LowestTreePlacementSnowLine() && new_z > GetTileZ(old_tile)) return;
}
// Don't plant trees, if ground was freshly cleared // Don't plant trees, if ground was freshly cleared
if (IsTileType(tile, MP_CLEAR) && GetClearGround(tile) == CLEAR_GRASS && GetClearDensity(tile) != 3) return; if (IsTileType(tile, MP_CLEAR) && GetClearGround(tile) == CLEAR_GRASS && GetClearDensity(tile) != 3) return;