Function GetAxisForNewRoadWaypoint

src/waypoint_cmd.cpp:128–142

* Get the axis for a new road waypoint. This means that if it is a valid * tile to build a waypoint on it returns a valid Axis, otherwise an * invalid one. * @param tile the tile to look at. * @return the axis for the to-be-build waypoint. */

 * @return the axis for the to-be-build waypoint.
 */
Axis GetAxisForNewRoadWaypoint(TileIndex tile)
{
	/* The axis for existing road waypoints is easy. */
	if (IsRoadWaypointTile(tile)) return GetDriveThroughStopAxis(tile);

	/* Non-plain road type, no valid axis for waypoints. */
	if (!IsNormalRoadTile(tile)) return INVALID_AXIS;

	RoadBits bits = GetAllRoadBits(tile);

	if ((bits & ROAD_Y) == 0) return AXIS_X;
	if ((bits & ROAD_X) == 0) return AXIS_Y;

	return INVALID_AXIS;
}

extern CommandCost ClearTile_Station(TileIndex tile, DoCommandFlags flags);