Solved Block Dragon Eggs from falling

I've looked through the api docs and have tried many different things, but I can't seem to disable dragon eggs from falling. Is there a way to do it, and how so?

 

It's not BlockPhysicsEvent is it?

 

Yeah it is that but I'm not sure how to check if it's a Dragon Egg that's falling.

This doesn't work:

Code:

    @EventHandler
    public void onDragonEggFall(BlockPhysicsEvent event){
        if(getConfig().getBoolean("DragonEgg.BlockFall") == true){
            if(event.getChangedType() == Material.DRAGON_EGG){
                event.setCancelled(true);
            }
        }
    }

This also doesn't work:

Code:

    @EventHandler
    public void onDragonEggFall(BlockPhysicsEvent event){
        if(getConfig().getBoolean("DragonEgg.BlockFall") == true){
            if(event.getChangedTypeId() == 122){
                event.setCancelled(true);
            }
        }
    }

Any suggestions?

 

what I would do:

Code:

@EventHandler
public void onRightClick(PlayerInteractEvent e){
    Action action = e.getAction();
    Block clicked = e.getClickedBlock();
    Material type = clicked.getType();
    
        if(action == Action.RIGHT_CLICK_BLOCK){
            if(type == Material.DRAGON_EGG){
            
                if(getConfig().getBoolean("DragonEgg.BlockFall") == true){
                    e.setCancelled(false);
                } else{
                    e.setCancelled(true);
                }
            }
        }
    }

Prevents even right clickig the egg to stop it from moving.

 

Try this, make sure you check the block, not the changedtype.

Code:

@EventHandler
public void onBlockPhysicsEvent(BlockPhysicsEvent event) {
  if(event.getBlock().getTypeId() == 122) {
    if(getConfig().getBoolean("DragonEgg.BlockFall")){
      event.setCancelled(true);
    }
  }
}

 

I already knew that and it's not what I was asking help for in this thread.

Now if you place the dragon egg on a block, break the block underneath, it won't fall. But if you place the dragon egg on the side of a block it will still fall.

 

Interesting. My guess would be that when you place a block that is effected by gravity you're actually spawning a falling entity, which doesn't fire a BlockPhysicsEvent.

 

Here's what I'd do.. prevent the damn thing from dropping haha.

Code:

@EventHandler
public void onEnderDragonDeath(EntityDeathEvent event) {
if (!(event.getEntity() instanceof EnderDragon)) {
return;
}
if (getConfig().getBoolean("DragonEgg.BlockFall")) {
event.getDrops().clear();
}
}

Edit:

I don't actually know if this will work haha.

 

I don't want to clear the drops of the ender dragon, I just want to stop dragon eggs from being affected by gravity.

So do you have any idea how I would stop dragon egg specific entities from falling? Dragon Egg doesn't seem to be an entity, so I'm clueless.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

It would be a FallingBlockEntity, this issue has been around for over 5 months and its priority is marked as minor.

There was a work around posted in this thread. It involved placing a block under it (only if the egg was placed on top of fire, water, or air) whenever BlockPlaceEvent was fired and then 2 ticks later changing the block back to normal.

 

How would I get the block underneath the placed block?
EDIT: Never mind

 

YoFuzzy3
Hey here's a class that would stop DragonEggs from falling.

Code:

import java.lang.reflect.Method;
import java.util.Random;

import net.minecraft.server.Block;
import net.minecraft.server.BlockDragonEgg;
import net.minecraft.server.World;

public class ModifiedBlockDragonEgg extends BlockDragonEgg{
  public ModifiedBlockDragonEgg(int i, int j) {
    super(i, j);
  }
  @Override
  public void b(World world, int i, int j, int k, Random random) {
    world.setTypeId(i, j, k, this.id);
  }
  public static void enable() {
    try {
      Method c = Block.class.getDeclaredMethod("c", float.class);
      Method b = Block.class.getDeclaredMethod("b", float.class);
      Method a = Block.class.getDeclaredMethod("a", net.minecraft.server.StepSound.class);
      Method af = Block.class.getDeclaredMethod("a", float.class);
      c.setAccessible(true);
      b.setAccessible(true);
      a.setAccessible(true);
      af.setAccessible(true);
      Block.byId[Block.DRAGON_EGG.id] = null;
      Block mde = (ModifiedBlockDragonEgg)(new ModifiedBlockDragonEgg(122, 167)).b("dragonEgg");
      mde = (Block)c.invoke(mde, 3.0F);
      mde = (Block)b.invoke(mde, 15.0F);
      mde = (Block)a.invoke(mde, Block.h);
      mde = (Block)af.invoke(mde, 0.125F);
      Block.byId[Block.DRAGON_EGG.id] = mde;
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  public static void disable() {
    Block.byId[Block.DRAGON_EGG.id] = null;
    Block.byId[Block.DRAGON_EGG.id] = Block.DRAGON_EGG;
  }
}

You would add this to onEnable()

Code:

ModifiedBlockDragonEgg.enable();

and you would add this in onDisable()

Code:

ModifiedBlockDragonEgg.disable();

 

It works perfectly, thanks so much! ..But can you explain how it works?

 

The class ModifiedBlockDragonEgg extends BlockDragonEgg and overrides method b(World world, int i, int j, int k, Random random).

Originally something along the lines of this happens when a DragonEgg spawns

Code:

public void b(World world, int i, int j, int k, Random random) {
  l(world, i, j, k);
}
private void l(World world, int i, int j, int k) {
  if ((BlockSand.canFall(world, i, j - 1, k)) && (j >= 0)) {
    byte b0 = 32;
    if ((!BlockSand.instaFall) && (world.d(i - b0, j - b0, k - b0, i + b0, j + b0, k + b0))) {
      EntityFallingBlock entityfallingblock = new EntityFallingBlock(world, i + 0.5F, j + 0.5F, k + 0.5F, this.id, world.getData(i, j, k));
      world.addEntity(entityfallingblock);
    }
    else {
      world.setTypeId(i, j, k, 0);
      while ((BlockSand.canFall(world, i, j - 1, k)) && (j > 0)) {
        j--;
      }
      if (j > 0) {
        world.setTypeId(i, j, k, this.id);
      }
    }
  }
}

By overriding b(World world, int i, int j, int k, Random random) the method which spawns the EntityFallingBlock is never called.

The enable method uses some reflection to setup the ModifiedBlockDragonEgg instance and replaces the original BlockDragonEgg with the modified one. The disable method sets the modified BlockDragonEgg back to the original.

 

one4me
Well thank you very much for the help!
I've added you as one of the authors to my little plugin.
http://dev.bukkit.org/server-mods/dragoneggs/