Hello everyone

 

This is my first post here, so my apologies in advance if I do anything wrong! So, I've been following a few tutorials and things seem to go pretty smooth. The only problem that I have is when I set the blockbounds of a block inside the AxisAlignedBB function. In the crash log I get 'Unreported exception thrown'.

Here is my full crash thingie that I get in the Eclipse console:

 

 

[13:01:05] [Client thread/FATAL]: Unreported exception thrown!
java.lang.NullPointerException
at com.jstylezzz.allincluded.block.UICopperCable.getCollisionBoundingBoxFromPool(UICopperCable.java:40) ~[uICopperCable.class:?]
at net.minecraft.world.World.canPlaceEntityOnSide(World.java:3647) ~[World.class:?]
at net.minecraft.item.ItemBlock.func_150936_a(ItemBlock.java:172) ~[itemBlock.class:?]
at net.minecraft.client.multiplayer.PlayerControllerMP.onPlayerRightClick(PlayerControllerMP.java:383) ~[PlayerControllerMP.class:?]
at net.minecraft.client.Minecraft.func_147121_ag(Minecraft.java:1519) ~[Minecraft.class:?]
at net.minecraft.client.Minecraft.runTick(Minecraft.java:2034) ~[Minecraft.class:?]
at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1029) ~[Minecraft.class:?]
at net.minecraft.client.Minecraft.run(Minecraft.java:951) [Minecraft.class:?]
at net.minecraft.client.main.Main.main(Main.java:164) [Main.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_31]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_31]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_31]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_31]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.11.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.11.jar:?]
at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:78) [start/:?]
at GradleStart.main(GradleStart.java:45) [start/:?]
[13:01:05] [Client thread/INFO] [sTDOUT]: [net.minecraft.client.Minecraft:displayCrashReport:388]: ---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 1/25/15 1:01 PM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at com.jstylezzz.allincluded.block.UICopperCable.getCollisionBoundingBoxFromPool(UICopperCable.java:40)
at net.minecraft.world.World.canPlaceEntityOnSide(World.java:3647)
at net.minecraft.item.ItemBlock.func_150936_a(ItemBlock.java:172)
at net.minecraft.client.multiplayer.PlayerControllerMP.onPlayerRightClick(PlayerControllerMP.java:383)
at net.minecraft.client.Minecraft.func_147121_ag(Minecraft.java:1519)
at net.minecraft.client.Minecraft.runTick(Minecraft.java:2034)
at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1029)
at net.minecraft.client.Minecraft.run(Minecraft.java:951)
at net.minecraft.client.main.Main.main(Main.java:164)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:78)
at GradleStart.main(GradleStart.java:45)

 

 

 

It only happens when the following function is not commented out:

this.setBlockBounds(11*pixel/2, 11*pixel/2, 11*pixel/2-(cable.connections[3] !=null?(11*pixel/2):0), 1-11*pixel/2, 1-11*pixel/2, 1-11*pixel/2);

 

The whole callback is as follows

public AxisAlignedBB getCollisionBoundingBoxFromPool(World world, int x, int y, int z)
{
	TileEntityCable cable = (TileEntityCable) world.getTileEntity(x, y, z);
	float pixel = 1F/16;
	this.setBlockBounds(11*pixel/2, 11*pixel/2, 11*pixel/2-(cable.connections[3] !=null?(11*pixel/2):0), 1-11*pixel/2, 1-11*pixel/2, 1-11*pixel/2);
	return AxisAlignedBB.getBoundingBox((double)x+minX, (double)y+minY,(double)z+minZ, (double)x+maxX, (double)y+maxY, (double)z+maxZ);
}

 

Note, that Minecraft only crashes if I place the block down. If a block is already placed down in the world, it does not make minecraft crash, but it also doesn't change the blockbounds.

 

I'm sure that there is something that I'm doing wrong, but I really can't seem to find out what it is..

 

I hope someone here knows what's going on, all the help is much appreciated.

Thanks in advance!

 

EDIT: lol, I'm sorry for those posts (which I removed again), it seems I pressed the wrong button

cable.connections

is null.

But the ':0' thing at the end should set that thingie to '0' if it is null right?

(cable.connections[3] !=null?(11*pixel/2):0)

 

 

No, the

connections

array is null, so when trying to access

connections[3]

, it will throw a NPE.

Ah I see, thanks for the heads up I'm not really sure what I should change though, the 'connections' is basically this

public ForgeDirection [] connections = new ForgeDirection[6];

//and then

public void updateConnections() //Called on updateEntity
{
	if(worldObj.getTileEntity(xCoord, yCoord+1, zCoord) instanceof TileEntityCable) connections[0] = ForgeDirection.UP;
	else connections[0] = null;

	if(worldObj.getTileEntity(xCoord, yCoord-1, zCoord) instanceof TileEntityCable) connections[1] = ForgeDirection.DOWN;
	else connections[1] = null;

	if(worldObj.getTileEntity(xCoord, yCoord, zCoord-1) instanceof TileEntityCable) connections[2] = ForgeDirection.NORTH;
	else connections[2] = null;

	if(worldObj.getTileEntity(xCoord+1, yCoord, zCoord) instanceof TileEntityCable) connections[3] = ForgeDirection.EAST;
	else connections[3] = null;

	if(worldObj.getTileEntity(xCoord, yCoord, zCoord+1) instanceof TileEntityCable) connections[4] = ForgeDirection.SOUTH;
	else connections[4] = null;

	if(worldObj.getTileEntity(xCoord-1, yCoord, zCoord) instanceof TileEntityCable) connections[5] = ForgeDirection.WEST;
	else connections[5] = null;

}

 

Is there a way to get around that NPE?

 

Thanks for the answers so far

if connections[x] != null 
    do it with the connection
else
    do something else

?

Then the only other thing that can be null on that line is

cable

. Can you post your full block class?

Sure I can

package com.jstylezzz.allincluded.block;

import net.minecraft.block.Block;
import net.minecraft.block.BlockContainer;
import net.minecraft.block.material.Material;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.world.World;

import com.jstylezzz.allincluded.AllIncluded;
import com.jstylezzz.allincluded.entity.TileEntityCable;

public class UICopperCable extends BlockContainer {

public UICopperCable() {
	super(Material.cloth);
	setStepSound(Block.soundTypeStone);
	setCreativeTab(CreativeTabs.tabBlock);
	setCreativeTab(AllIncluded.allIncluded);
	setBlockName("uiCopperCable");
	setBlockTextureName("allincluded:uiCopperCable");
	setHardness(1.0f);
	useNeighborBrightness=true;
	float pixel = 1F/16;
	setBlockBounds(11*pixel/2, 11*pixel/2, 11*pixel/2, 1-11*pixel/2, 1-11*pixel/2, 1-11*pixel/2);

}

public TileEntity createNewTileEntity(World world, int i)
{
	return new TileEntityCable();
}

public AxisAlignedBB getCollisionBoundingBoxFromPool(World world, int x, int y, int z)
{
	TileEntityCable cable = (TileEntityCable) world.getTileEntity(x, y, z);
	float pixel = 1F/16;
	float f = 0;
	if(cable.connections[3] == null) f = 0;
	else f = 11*pixel/2;

	this.setBlockBounds(11*pixel/2,  11*pixel/2, 11*pixel/2-(f), 1-11*pixel/2, 1-11*pixel/2, 1-11*pixel/2);
	return AxisAlignedBB.getBoundingBox((double)x+minX, (double)y+minY,(double)z+minZ, (double)x+maxX, (double)y+maxY, (double)z+maxZ);
}

public int getRenderType(){
	return -1;
}
public boolean isOpaqueCube(){
	return false;
}
public boolean renderAsNormalBlock()
{
	return false;
}
}

 

Here is the UICopperCable class.

 

if connections[x] != null 
    do it with the connection
else
    do something else

?

 

I tried something like this, but it still doesn't like it very much. Thanks anyways!

You need to have the

public boolean hasTileEntity(int meta)

in your block class and make it return true.

I added

public boolean hasTileEntity(int meta)
{
return true;
}

 

into the UICopperCable class file. It still crashes when I place down the block though. Is there anything else a tileEntity block should have in it's class that I missed?

Ah, now I see the issue. You have called your method

createNewTileEntity

while it should be

createTileEntity

. In the future, add the

@Override

annotation to all your methods you expect to override a method, as it will throw an error if the method doesn't exist in one of the super classes.

Ah, thanks a lot for looking I think we nearly solved this problem, yey

 

I added the override

@Override
public TileEntity createNewTileEntity(World world, int i)
{
	return new TileEntityCable();
}

 

When I change createNewTileEntity to createTileEntity it gives me an error, so I tried it like I paste above. It still crashes on me though

Thanks for helping me, and sorry for being so difficult!

So this is giving you an error?

@Override
public TileEntity createTileEntity(World world, int meta)
{
    return new TileEntityCable();
}

It should work if it's like that. You still have the

hasTileEntity

method?

Yeah, I still have it. This is what Eclipse says: 'The type UICopperCable must implement the inherited abstract method ITileEntityProvider.createNewTileEntity(World, int)'. It has the option to add the unimplemented method, but that just adds the createNewTileEntity thing that we just changed..