Added CreateSpawnPosition event Closes #1053

src/main/java/net/minecraftforge/event/ForgeEventFactory.java

@@ -21,6 +21,7 @@ import net.minecraft.item.ItemStack;
 import net.minecraft.world.Explosion;
 import net.minecraft.world.World;
 import net.minecraft.world.WorldServer;
+import net.minecraft.world.WorldSettings;
 import net.minecraft.world.biome.BiomeGenBase;
 import net.minecraft.world.storage.IPlayerFileData;
 import net.minecraft.world.storage.SaveHandler;
@@ -240,4 +241,9 @@ public class ForgeEventFactory
         */
         MinecraftForge.EVENT_BUS.post(new ExplosionEvent.Detonate(world, explosion, list));
     }
+
+    public static boolean onCreateWorldSpawn(World world, WorldSettings settings)
+    {
+        return MinecraftForge.EVENT_BUS.post(new WorldEvent.CreateSpawnPosition(world, settings));
+    }
 }

src/main/java/net/minecraftforge/event/world/WorldEvent.java

@@ -5,13 +5,14 @@ import java.util.List;
 
 import net.minecraft.entity.EnumCreatureType;
 import net.minecraft.world.World;
+import net.minecraft.world.WorldSettings;
 import net.minecraft.world.biome.BiomeGenBase.SpawnListEntry;
 import cpw.mods.fml.common.eventhandler.Cancelable;
 import cpw.mods.fml.common.eventhandler.Event;
 
 /**
  * WorldEvent is fired when an event involving the world occurs.<br>
- * If a method utilizes this {@link Event} as its parameter, the method will 
+ * If a method utilizes this {@link Event} as its parameter, the method will
  * receive every child event of this class.<br>
  * <br>
  * {@link #world} contains the World this event is occuring in.<br>
@@ -31,8 +32,8 @@ public class WorldEvent extends Event
      * WorldEvent.Load is fired when Minecraft loads a world.<br>
      * This event is fired when a world is loaded in
      * WorldClient#WorldClient(NetHandlerPlayClient, WorldSettings, int, EnumDifficulty, Profiler),
-     * MinecraftServer#loadAllWorlds(String, String, long, WorldType, String), 
-     * DimensionManager#initDimension(int), 
+     * MinecraftServer#loadAllWorlds(String, String, long, WorldType, String),
+     * DimensionManager#initDimension(int),
      * and ForgeInternalHandler#onDimensionLoad(Load). <br>
      * <br>
      * This event is not {@link Cancelable}.<br>
@@ -49,10 +50,10 @@ public class WorldEvent extends Event
     /**
      * WorldEvent.Unload is fired when Minecraft unloads a world.<br>
      * This event is fired when a world is unloaded in
-     * Minecraft#loadWorld(WorldClient, String), 
-     * MinecraftServer#deleteWorldAndStopServer(), 
-     * MinecraftServer#stopServer(), 
-     * DimensionManager#unloadWorlds(Hashtable<Integer, long[]>), 
+     * Minecraft#loadWorld(WorldClient, String),
+     * MinecraftServer#deleteWorldAndStopServer(),
+     * MinecraftServer#stopServer(),
+     * DimensionManager#unloadWorlds(Hashtable<Integer, long[]>),
      * ForgeInternalHandler#onDimensionUnload(Unload). <br>
      * <br>
      * This event is not {@link Cancelable}.<br>
@@ -69,7 +70,7 @@ public class WorldEvent extends Event
     /**
      * WorldEvent.Save is fired when Minecraft saves a world.<br>
      * This event is fired when a world is saved in
-     * WorldServer#saveAllChunks(boolean, IProgressUpdate), 
+     * WorldServer#saveAllChunks(boolean, IProgressUpdate),
      * ForgeInternalHandler#onDimensionSave(Save). <br>
      * <br>
      * This event is not {@link Cancelable}.<br>
@@ -113,4 +114,19 @@ public class WorldEvent extends Event
             }
         }
     }
+
+    /**
+     * Called by WorldServer when it attempts to create a spawnpoint for a dimension.
+     * Canceling the event will prevent the vanilla code from running.
+     */
+    @Cancelable
+    public static class CreateSpawnPosition extends WorldEvent
+    {
+        public final WorldSettings settings;
+        public CreateSpawnPosition(World world, WorldSettings ws)
+        {
+            super(world);
+            this.settings = ws;
+        }
+    }
 }