Can I use NBTTagCompound at blocks? I wan't to change the spawning entity in a monster spawner. How can I do that?

func_145881_a

on a

TileEntityMobSpawner

will give you the

MobSpawnerBaseLogic

. That has methods for setting the Entity to spawn.

How do I get the TileEntityMobSpawner?

(TileEntityMobSpawner) spawner = (TileEntityMobSpawner)world.getTileEntity(x,y,z)

(TileEntityMobSpawner) spawner = (TileEntityMobSpawner)world.getTileEntity(x,y,z)

 

w.setBlock(x, y, z, Blocks.mob_spawner);
TileEntityMobSpawner spawner = (TileEntityMobSpawner) w.getTileEntity(x, y, z);
MobSpawnerBaseLogic logic = spawner.func_145881_a();
logic.setEntityName("Witch");
logic.updateSpawner();

 

This (used in the PlayerInteractEvent) works, but when I right click on the spawner, it dissapers. Looks like, Minecraft doesn't accept the "setBlock()"...

Can you post the method in which you call that code?

Can you post the method in which you call that code?

 

@SubscribeEvent
public void onPlayerInteract(PlayerInteractEvent e){
	if(e.action == Action.RIGHT_CLICK_BLOCK){	
		EntityPlayer p = e.entityPlayer;			
		ItemStack items = p.inventory.getCurrentItem();
		if(items == null) return;
		Item item = items.getItem();
		String name = item.getUnlocalizedName();
		if(name.equals(Blocks.mob_spawner.getUnlocalizedName())){
			World w = e.world;
			int x = e.x;
			int y = e.y;
			int z = e.z;
			Block b = e.world.getBlock(x, y, z);
			if(!b.getUnlocalizedName().equalsIgnoreCase(Blocks.tallgrass.getUnlocalizedName())){
				switch(e.face){
				case 0: y--; break;
				case 1: y++; break;
				case 2: z--; break;
				case 3: z++; break;
				case 4: x--; break;
				case 5: x++; break;
				}
			}					
			w.setBlock(x, y, z, Blocks.mob_spawner);
			TileEntityMobSpawner spawner = (TileEntityMobSpawner) w.getTileEntity(x, y, z);
			MobSpawnerBaseLogic logic = spawner.func_145881_a();
			logic.setEntityName("Witch");
			logic.updateSpawner();
		}			
	}
}

First of all: Don't compare via unlocalized names. To get a Block from an Item use

Block.getBlockFromItem

. Then: don't call updateSpawner, why do you call that? Don't just randomly call methods...

Also make sure to only do this on the server (world.isRemote is false).

 

I don't now what you mean

 

I removed the updateSpawner and changed the comparation stuff. But how can I fix the world.setBlock() ? This has not to do with the MobSpawner. I tested the world.setBlock() with an other block and it dissapears at all when I click on it

 

What do you mean with "Also make sure to only do this on the server" ?

#push