Added CreateSpawnPosition event Closes #1053

patches/minecraft/net/minecraft/world/WorldServer.java.patch

@@ -179,7 +179,15 @@
      protected void func_72963_a(WorldSettings p_72963_1_)
      {
          if (this.field_73066_T == null)
-@@ -726,7 +769,7 @@
+@@ -681,6 +724,7 @@
+         }
+         else
+         {
++            if (net.minecraftforge.event.ForgeEventFactory.onCreateWorldSpawn(this, p_73052_1_)) return;
+             this.field_72987_B = true;
+             WorldChunkManager worldchunkmanager = this.field_73011_w.field_76578_c;
+             List list = worldchunkmanager.func_76932_a();
+@@ -726,7 +770,7 @@
  
      protected void func_73047_i()
      {
@@ -188,7 +196,7 @@
  
          for (int i = 0; i < 10; ++i)
          {
-@@ -763,6 +806,7 @@
+@@ -763,6 +807,7 @@
              }
  
              this.field_73020_y.func_73151_a(p_73044_1_, p_73044_2_);
@@ -196,7 +204,7 @@
              ArrayList arraylist = Lists.newArrayList(this.field_73059_b.func_152380_a());
              Iterator iterator = arraylist.iterator();
  
-@@ -791,6 +835,7 @@
+@@ -791,6 +836,7 @@
          this.func_72906_B();
          this.field_73019_z.func_75755_a(this.field_72986_A, this.field_73061_a.func_71203_ab().func_72378_q());
          this.field_72988_C.func_75744_a();
@@ -204,7 +212,7 @@
      }
  
      public void func_72923_a(Entity p_72923_1_)
-@@ -851,6 +896,7 @@
+@@ -851,6 +897,7 @@
          Explosion explosion = new Explosion(this, p_72885_1_, p_72885_2_, p_72885_4_, p_72885_6_, p_72885_8_);
          explosion.field_77286_a = p_72885_9_;
          explosion.field_82755_b = p_72885_10_;
@@ -212,7 +220,7 @@
          explosion.func_77278_a();
          explosion.func_77279_a(false);
  
-@@ -941,19 +987,23 @@
+@@ -941,19 +988,23 @@
              this.field_73061_a.func_71203_ab().func_148537_a(new S2BPacketChangeGameState(8, this.field_73017_q), this.field_73011_w.field_76574_g);
          }
  
@@ -240,7 +248,7 @@
          }
      }
  
-@@ -1002,6 +1052,11 @@
+@@ -1002,6 +1053,11 @@
          }
      }
  

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;
+        }
+    }
 }