/**
* Is there a tunnel in the way in the given direction?
* @param tile the tile to search from.
* @param z the 'z' to search on.
* @param dir the direction to start searching to.
* @return true if and only if there is a tunnel.
*/
public static bool IsTunnelInWayDir(this TileIndex tile, int z, DiagDirection dir)
{
TileIndexDiff delta = TileOffsByDiagDir(dir);
int height;
do
{
tile -= delta;
if (!TileMap.IsValidTile(tile))
{
return(false);
}
height = TileMap.GetTileZ(tile);
} while (z < height);
return(z == height && IsTunnelTile(tile) && GetTunnelBridgeDirection(tile) == dir);
}
/**
* Gets the other end of the tunnel. Where a vehicle would reappear when it
* enters at the given tile.
* @param tile the tile to search from.
* @return the tile of the other end of the tunnel.
*/
public static TileIndex GetOtherTunnelEnd(this TileIndex tile)
{
DiagDirection dir = GetTunnelBridgeDirection(tile);
TileIndexDiff delta = TileOffsByDiagDir(dir);
int z = TileMap.GetTileZ(tile);
dir = ReverseDiagDir(dir);
do
{
tile += delta;
} while (
!IsTunnelTile(tile) ||
GetTunnelBridgeDirection(tile) != dir ||
TileMap.GetTileZ(tile) != z
);
return(tile);
}
