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Add setting for if/when towns can build tunnels

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This commit is contained in:
Jonathan G Rennison
2022-10-10 18:01:44 +01:00
parent 7e6f7ebba6
commit 1e4912cf78
6 changed files with 37 additions and 0 deletions
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4
src/town_cmd.cpp
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@@ -1426,6 +1426,8 @@ static bool GrowTownWithTunnel(const Town *t, const TileIndex tile, const DiagDi
{
assert(tunnel_dir < DIAGDIR_END);
if (_settings_game.economy.town_build_tunnels == TTM_FORBIDDEN) return false;
Slope slope = GetTileSlope(tile);
/* Only consider building a tunnel if the starting tile is sloped properly. */
@@ -1439,6 +1441,8 @@ static bool GrowTownWithTunnel(const Town *t, const TileIndex tile, const DiagDi
/* There are two conditions for building tunnels: Under a mountain and under an obstruction. */
if (CanRoadContinueIntoNextTile(t, tile, tunnel_dir)) {
if (_settings_game.economy.town_build_tunnels != TTM_ALLOWED) return false;
/* Only tunnel under a mountain if the slope is continuous for at least 4 tiles. We want tunneling to be a last resort for large hills. */
TileIndex slope_tile = tile;
for (uint8 tiles = 0; tiles < 4; tiles++) {