[1.8] Tile Entity check if entity is on top of block

[Brickfix]

Hi,

as the title says, I am looking for a way to get an entity on top of a block during the TileEntity update function,

but the method I got here is returning null all the time. I copied out of the world class and modified it a bit, did I do something wrong?

I want to know if there is a chicken on top of the block, and do something according to this ...

 

public Entity getEntityAboveBlock()
    {
	AxisAlignedBB aabb = new AxisAlignedBB(this.pos, this.pos.add(0, 1, 0));
	List list = this.worldObj.getEntitiesWithinAABB(EntityChicken.class, aabb);
        Entity entity1 = null;
        double d0 = Double.MAX_VALUE;

        for (int i = 0; i < list.size(); ++i)
        {
            Entity entity2 = (Entity)list.get(i);

            if ( IEntitySelector.NOT_SPECTATING.apply(entity2))
            {
                

            	double d1 = this.pos.distanceSq(entity2.posX, entity2.posY, entity2.posZ);
            	
                if (d1 <= d0)
                {
                    entity1 = entity2;
                    d0 = d1;
                }
            }
        }

        return entity1;
    }

 

I would need the same to check for items, but I got no clue on how to do this

 

Thanks for any help (:

[TheGreyGhost]

The logic looks roughly right.

 

Have you tried debugging it using breakpoints or System.out.println, eg

System.out.println("Found entities count:"+list.size()):

etc

 

-TGG

[Brickfix]

Jup, I did so.

 

It always returned null as an entity, and the listsize was always 0

[jabelar]

You may need to think through the math of the getEntitiesWithinAABB() function.  I looked up the call hierarchy and I'm suspicious that if the AABB you start with has minX = maxX, etc, which it will in your case, that maybe the code won't find anything.  Like maybe you should try expanding the AABB a bit bigger to see if that finds the entity.

 

If you get stuck you could consider the opposite approach.  You can handle the LivingUpdateEvent and check for your tile entity underneath the entity.  I think code like this should work for that:

	public Block findBlockUnderEntity(Entity parEntity)
{
    int blockX = MathHelper.floor_double(parEntity.posX);
    int blockY = MathHelper.floor_double(parEntity.getEntityBoundingBox().minY)-1;
    int blockZ = MathHelper.floor_double(parEntity.posZ);
    return parEntity.worldObj.getBlockState(new BlockPos(blockX, blockY, blockZ)).getBlock();
}

[Brickfix]

Thanks, the aabb was the problem. I had to set it to pos.add(1,2,1) and it works without a problem. Thanks for pointing it out