@@ -499,6 +499,12 @@ CommandCost CmdBuildTunnel(TileIndex sta
}
end_tile = start_tile;
/** Tile shift coeficient. Will decrease for very long tunnels to avoid exponential growth of price*/
int tiles_coef = 3;
/** Number of tiles from start of tunnel */
int tiles = 0;
for (;;) {
end_tile += delta;
end_tileh = GetTileSlope(end_tile, &end_z);
@@ -509,8 +515,11 @@ CommandCost CmdBuildTunnel(TileIndex sta
return_cmd_error(STR_5003_ANOTHER_TUNNEL_IN_THE_WAY);
tiles++;
if (tiles == 25 || tiles == 50 || tiles == 100 || tiles == 200 || tiles == 400 || tiles == 800) tiles_coef++;
cost.AddCost(_price.build_tunnel);
cost.AddCost(cost.GetCost() >> 3); // add a multiplier for longer tunnels
cost.AddCost(cost.GetCost() >> tiles_coef); // add a multiplier for longer tunnels
/* Add the cost of the entrance */