Method blockage

src/Battlescape/TileEngine.cpp:1670–1783

* Calculates the amount this certain wall or floor-part of the tile blocks. * @param startTile The tile where the power starts. * @param part The part of the tile the power needs to go through. * @param type The type of power/damage. * @param direction Direction the power travels. * @return Amount of blockage. */

 * @return Amount of blockage.
 */
int TileEngine::blockage(Tile *tile, const int part, ItemDamageType type, int direction, bool checkingFromOrigin)
{
	int blockage = 0;

	if (tile == 0) return 0; // probably outside the map here
	if (tile->getMapData(part))
	{
		bool check = true;
		int wall = -1;
		if (direction != -1)
		{
			wall = tile->getMapData(MapData::O_OBJECT)->getBigWall();

			if (checkingFromOrigin &&
				(wall == Pathfinding::BIGWALLNESW ||
				wall == Pathfinding::BIGWALLNWSE))
			{
				check = false;
			}
			switch (direction)
			{
			case 0: // north
				if (wall == Pathfinding::BIGWALLWEST ||
					wall == Pathfinding::BIGWALLEAST ||
					wall == Pathfinding::BIGWALLSOUTH ||
					wall == Pathfinding::BIGWALLEASTANDSOUTH)
				{
					check = false;
				}
				break;
			case 1: // north east
				if (wall == Pathfinding::BIGWALLWEST ||
					wall == Pathfinding::BIGWALLSOUTH)
				{
					check = false;
				}
				break;
			case 2: // east
				if (wall == Pathfinding::BIGWALLNORTH ||
					wall == Pathfinding::BIGWALLSOUTH ||
					wall == Pathfinding::BIGWALLWEST)
				{
					check = false;
				}
				break;
			case 3: // south east
				if (wall == Pathfinding::BIGWALLNORTH ||
					wall == Pathfinding::BIGWALLWEST)
				{
					check = false;
				}
				break;
			case 4: // south
				if (wall == Pathfinding::BIGWALLWEST ||
					wall == Pathfinding::BIGWALLEAST ||
					wall == Pathfinding::BIGWALLNORTH)
				{
					check = false;