Improve how a unloaded LodWorld is handled

src/main/java/com/backsun/lod/builders/LodBuilder.java

@@ -27,7 +27,7 @@ import net.minecraft.world.server.ServerWorld;
  * (specifically: Lod World, Dimension, Region, and Chunk objects)
  * 
  * @author James Seibel
- * @version 3-27-2021
+ * @version 4-01-2021
  */
 public class LodBuilder
 {
@@ -59,7 +59,7 @@ public class LodBuilder
 	
 	public void generateLodChunkAsync(IChunk chunk, LodWorld lodWorld, DimensionType dim)
 	{
-		if (lodWorld == null)
+		if (lodWorld == null || !lodWorld.getIsWorldLoaded())
 			return;
 			
 		// is this chunk from the same world as the lodWorld?

src/main/java/com/backsun/lod/objects/LodWorld.java

@@ -9,14 +9,15 @@ import net.minecraft.world.DimensionType;
  * This stores all LODs for a given world.
  * 
  * @author James Seibel
- * @version 03-31-2021
+ * @version 04-01-2021
  */
 public class LodWorld
 {
 	private String worldName;
 	
 	private Map<DimensionType, LodDimension> lodDimensions;
-	
+	/** If true then the LOD world is setup and ready to use */
+	private boolean isWorldLoaded = false;
 	
 	public LodWorld()
 	{
@@ -32,6 +33,7 @@ public class LodWorld
 	{
 		worldName = newWorldName;
 		lodDimensions = new Hashtable<DimensionType, LodDimension>();
+		isWorldLoaded = true;
 	}
 	
 	/**
@@ -43,6 +45,7 @@ public class LodWorld
 	{
 		worldName = "No world loaded";
 		lodDimensions = null;
+		isWorldLoaded = false;
 	}
 	
 	
@@ -76,6 +79,10 @@ public class LodWorld
 	}
 	
 	
+	public boolean getIsWorldLoaded()
+	{
+		return isWorldLoaded;
+	}
 	
 	public String getWorldName()
 	{

src/main/java/com/backsun/lod/proxy/ClientProxy.java

@@ -22,7 +22,7 @@ import net.minecraftforge.eventbus.api.SubscribeEvent;
  * and is the starting point for most of this program.
  * 
  * @author James_Seibel
- * @version 03-31-2021
+ * @version 04-01-2021
  */
 public class ClientProxy
 {
@@ -64,7 +64,7 @@ public class ClientProxy
 		}
 		
 		
-		if (mc == null || mc.player == null || lodWorld == null)
+		if (mc == null || mc.player == null || !lodWorld.getIsWorldLoaded())
 			return;
 		
 		LodDimension lodDim = lodWorld.getLodDimension(mc.player.world.getDimensionType());