Function UpdateStatusAfterSwap

src/train_cmd.cpp:1612–1641

* Updates some variables after swapping the vehicle. * @param v swapped vehicle */

 * @param v swapped vehicle
 */
static void UpdateStatusAfterSwap(Train *v)
{
	/* Reverse the direction. */
	if (v->track != TRACK_BIT_DEPOT) v->direction = ReverseDir(v->direction);

	/* Call the proper EnterTile function unless we are in a wormhole. */
	if (v->track != TRACK_BIT_WORMHOLE) {
		VehicleEnterTile(v, v->tile, v->x_pos, v->y_pos);
	} else {
		/* VehicleEnter_TunnelBridge() sets TRACK_BIT_WORMHOLE when the vehicle
		 * is on the last bit of the bridge head (frame == TILE_SIZE - 1).
		 * If we were swapped with such a vehicle, we have set TRACK_BIT_WORMHOLE,
		 * when we shouldn't have. Check if this is the case. */
		TileIndex vt = TileVirtXY(v->x_pos, v->y_pos);
		if (IsTileType(vt, MP_TUNNELBRIDGE)) {
			VehicleEnterTile(v, vt, v->x_pos, v->y_pos);
			if (v->track != TRACK_BIT_WORMHOLE && IsBridgeTile(v->tile)) {
				/* We have just left the wormhole, possibly set the
				 * "goingdown" bit. UpdateInclination() can be used
				 * because we are at the border of the tile. */
				v->UpdatePosition();
				v->UpdateInclination(true, true);
				return;
			}
		}
	}

	v->UpdatePosition();
	v->UpdateViewport(true, true);
}

/**
 * Swap vehicles \a l and \a r in consist \a v, and reverse their direction.