EntityItem onUpdate() NullPointerException

[ss7]

Hello,

 

I'm trying to render a

EntityItem

above a

Block

and that works, but i want it to rotate, so i call item.onUpdate() in my

updateEntity()

of my

TileEntity

. The problem is, that the game crashes with a NullPointerException, even if i check for item != null. Here is the full crash log:

 

http://gw.minecraftforge.net/BGXq

 

But when i look at the error line there is only

this.worldObj.theProfiler.startSection("entityBaseTick");

but i think that this has nothing to do with it.

 

Here is my

updateEntity()

:

 

 

if (inventory[0] != null)
	{
		enabled = worldObj.isBlockIndirectlyGettingPowered(xCoord, yCoord, zCoord);
	}

	else
	{
		enabled = false;
	}

	if (item != null && enabled)
	{
		item.onUpdate();
	}

 

 

I hope you can help!

 

PS: As you can see i really like this Teletype function

 

ss7

[Draco18s]

Because you're using a "fake" EntityItem that isn't added to the world, the EntityItem is causing a NPE when it attempts to access its world object (which is null):

 

public void onEntityUpdate()
    {
        this.worldObj.theProfiler.startSection("entityBaseTick");

 

It's cashing at "this.worldObj.theProfiler" because "worldObj" is null.

[Draco18s]

Are you sure you are not creating the Entity with a null world?

 

He totally is, because he's never spawning it in the world (he's doing the same thing I'm doing right now, except he wants it to rotate, and I don't).

[Draco18s]

He totally is, because he's never spawning it in the world (he's doing the same thing I'm doing right now, except he wants it to rotate, and I don't).

There is a difference between the entity having a null world and the entity not being spawned into the world. You can totally construct an entity with a valid world, but never spawn it.

 

Touche.  Just checked my code and I am setting a world object, but I suspect he isn't.

As that's the only reason that line would crash.

[ss7]

Hello,

 

And!..........You will wonder......i am giving it the

worldObj

of the

TileEntity

! So i thought the problem would be that the

TileEntity's

worldObj

is not initialized, but i made a test with a bool that is true when it initialized the EntityItem, but that's also not working.

 

It's working sometimes, but not always.

 

ss7

[Draco18s]

I'd suggest just updating the entity's rotation/age/etc. through your TE's update, rather than calling the EntityItem's update function.

That would give you better control over the animation (e.g. rotating but not bobbing).  I'm actually using that for some animation one of of my blocks right now: tweaking the Entity's age, then using that value in the render process.

[ss7]

Hello,

 

I'm trying to adjust the

rotationYaw

of the

EntityItem

but it doesn't seem to work, it's just not rotating.

I was even looking at the

onUpdate()

method of

EntityItem

but it also set's no rotationYaw.

 

ss7

[Draco18s]

I'm trying to adjust the

rotationYaw

of the

EntityItem

but it doesn't seem to work, it's just not rotating.

I was even looking at the

onUpdate()

method of

EntityItem

but it also set's no rotationYaw.

 

Based on some trouble I had the other day, item entity's rotation is based on age.

[ss7]

Hello,

 

OK, now i'm incrementing the item's age every tick. That works sometimes for one full 360° rotation, but then it resets to the initial rotation. I've tried setting also the rotationYaw, but that doesn't worked. How have you done that?

 

ss7

[ss7]

Hello,

 

Should i change the item's age only on the server side or client side or both?

 

ss7