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-rw-r--r--src/tunnelbridge_cmd.cpp7
1 files changed, 6 insertions, 1 deletions
diff --git a/src/tunnelbridge_cmd.cpp b/src/tunnelbridge_cmd.cpp
index 5a038caf9..1f80a3c4d 100644
--- a/src/tunnelbridge_cmd.cpp
+++ b/src/tunnelbridge_cmd.cpp
@@ -505,6 +505,8 @@ CommandCost CmdBuildTunnel(TileIndex start_tile, uint32 flags, uint32 p1, uint32
int tiles_coef = 3;
/** Number of tiles from start of tunnel */
int tiles = 0;
+ /** Number of tiles at which the cost increase coefficient per tile is halved */
+ int tiles_bump = 25;
for (;;) {
end_tile += delta;
@@ -517,7 +519,10 @@ CommandCost CmdBuildTunnel(TileIndex start_tile, uint32 flags, uint32 p1, uint32
}
tiles++;
- if (tiles == 25 || tiles == 50 || tiles == 100 || tiles == 200 || tiles == 400 || tiles == 800) tiles_coef++;
+ if (tiles == tiles_bump) {
+ tiles_coef++;
+ tiles_bump *= 2;
+ }
cost.AddCost(_price.build_tunnel);
cost.AddCost(cost.GetCost() >> tiles_coef); // add a multiplier for longer tunnels