Fixed Conflict with Witchery Mod

* Changed DDTeleporter to stop us from generating exits to Witchery's
Spirit World - this would cause people to lose their items upon leaving
the dimension.
* Changed GatewayGenerator to stop us from generating gateways or rift
clusters in the Spirit World

src/main/java/StevenDimDoors/mod_pocketDim/core/DDTeleporter.java

@@ -46,6 +46,7 @@ public class DDTeleporter
 	private static final int MAX_ROOT_SHIFT_CHANCE = 100;
 	private static final int START_ROOT_SHIFT_CHANCE = 0;
 	private static final int ROOT_SHIFT_CHANCE_PER_LEVEL = 5;
+	private static final String SPIRIT_WORLD_NAME = "Spirit World";
 	
 	public static int cooldown = 0;
 	
@@ -644,9 +645,7 @@ public class DDTeleporter
 			for (int attempts = 0; attempts < 10; attempts++)
 			{
 				NewDimData selection = roots.get( random.nextInt(roots.size()) );
-				if (selection.id() != END_DIMENSION_ID &&
+				if (selection != current.root() && isValidForDungeonExit(selection, properties))
-					selection.id() != properties.LimboDimensionID &&
-					selection != current.root())
 				{
 					return generateSafeExit(selection, link, properties);
 				}
@@ -657,6 +656,19 @@ public class DDTeleporter
 		return generateSafeExit(current.root(), link, properties);
 	}
 	
+	private static boolean isValidForDungeonExit(NewDimData destination, DDProperties properties)
+	{
+		// Prevent exits to The End and Limbo
+		if (destination.id() == END_DIMENSION_ID || destination.id() == properties.LimboDimensionID)
+		{
+			return false;
+		}
+		// Prevent exits to Witchery's Spirit World; we need to load the dimension to retrieve its name.
+		// This is okay because the dimension would have to be loaded subsequently by generateSafeExit().
+		World world = PocketManager.loadDimension(destination.id());
+		return (world != null && !SPIRIT_WORLD_NAME.equals(world.provider.getDimensionName()));
+	}
+	
 	private static boolean generateSafeExit(NewDimData destinationDim, DimLink link, DDProperties properties)
 	{
 		// A safe exit attempts to place a Warp Door in a dimension with

src/main/java/StevenDimDoors/mod_pocketDim/world/gateways/GatewayGenerator.java

@@ -32,6 +32,7 @@ public class GatewayGenerator implements IWorldGenerator
 	private static final int OVERWORLD_DIMENSION_ID = 0;
 	private static final int NETHER_DIMENSION_ID = -1;
 	private static final int END_DIMENSION_ID = 1;
+	private static final String SPIRIT_WORLD_NAME = "Spirit World";
 	
 	private ArrayList<BaseGateway> gateways;
 	private BaseGateway defaultGateway;
@@ -58,12 +59,14 @@ public class GatewayGenerator implements IWorldGenerator
 	public void generate(Random random, int chunkX, int chunkZ, World world, IChunkProvider chunkGenerator, IChunkProvider chunkProvider)
 	{
 		// Don't generate rifts or gateways if the current world is a pocket dimension or the world is remote.
-		// Also don't generate anything in the Nether or The End.
+		// Also don't generate anything in the Nether, The End, or in Witchery's Spirit World.
+		// We only match against Spirit World using hashing to speed up the process a little (hopefully).
 		int dimensionID = world.provider.dimensionId;
 		if (world.isRemote
 			|| (world.provider instanceof PocketProvider)
 			|| (dimensionID == END_DIMENSION_ID)
-			|| (dimensionID == NETHER_DIMENSION_ID))
+			|| (dimensionID == NETHER_DIMENSION_ID)
+			|| (world.provider.getDimensionName().hashCode() == SPIRIT_WORLD_NAME.hashCode()))
 		{
 			return;
 		}