Function GetSingleSignalState

src/rail_map.h:372–375

* Get the state of a single signal * @param t the tile to get the signal state for * @param signalbit the signal * @return the state of the signal */

 * @return the state of the signal
 */
inline SignalState GetSingleSignalState(Tile t, uint8_t signalbit)
{
	return (SignalState)HasBit(GetSignalStates(t), signalbit);
}

/**
 * Set whether the given signals are present (Along/AgainstTrackDir)