Save Entity Data on tile entity

[email protected] · November 13, 2015

I have this "AlienCell" that is a tileEntity. I want to capture any entity that hits the block.I already have it setup, It crashes when saving though.

TileEntity

public class TileEntityAlienCell extends TileEntity {
public boolean empty=true;
public Entity mob;
@Override
public void readFromNBT(NBTTagCompound compound) {
	super.readFromNBT(compound);
	empty=compound.getBoolean("empty");
	if(!empty)
		mob=EntityList.createEntityFromNBT(compound.getCompoundTag("mob"), worldObj);

}

@Override
public void writeToNBT(NBTTagCompound compound) {
	super.writeToNBT(compound);
	NBTTagCompound EntityNBT=new NBTTagCompound();
	if(!empty)
		mob.writeToNBTOptional(EntityNBT);
	compound.setBoolean("empty", empty);
	compound.setTag("mob", EntityNBT);
        
}
}

Block

public class AlienCell extends BlockContainer {

public AlienCell() {
	super(Material.iron);
	this.setCreativeTab(Main.aliensTabTech);
	this.setHardness(12.0F);
	this.setCellBounds();

}

@Override
public void onEntityCollidedWithBlock(World worldIn, BlockPos pos, IBlockState state, Entity entityIn) {

	TileEntityAlienCell cell = (TileEntityAlienCell) worldIn.getTileEntity(pos);
	if (entityIn.ridingEntity == null && entityIn.riddenByEntity == null) {
		if (entityIn instanceof EntityPlayerMP) {

		} else {
			cell.mob.copyDataFromOld(entityIn);
			cell.empty=false;
		}
	}

}


public void setBlockBoundsBasedOnState(IBlockAccess worldIn, BlockPos pos) {
	this.setCellBounds();
}

private void setCellBounds() {
	this.setBlockBounds(-1.064F, 0.0F, -0.56F, 1.06F, 2.85F, 1.25F);
}

public int getRenderType() {
	return -1;
}

public boolean isOpaqueCube() {
	return false;
}

public boolean renderAsNormalBlock() {
	return false;
}

@Override
public TileEntity createNewTileEntity(World p_149915_1_, int p_149915_2_) {
	return new TileEntityAlienCell();
}

}

Crash

---- Minecraft Crash Report ----

// Ouch. That hurt

Time: 11/12/15 4:58 PM

Description: Colliding entity with block

java.lang.NullPointerException: Colliding entity with block

at com.madmodding.space.blocks.AlienCell.onEntityCollidedWithBlock(AlienCell.java:57)

at net.minecraft.entity.Entity.doBlockCollisions(Entity.java:924)

at net.minecraft.entity.Entity.moveEntity(Entity.java:850)

at net.minecraft.entity.EntityLivingBase.moveEntityWithHeading(EntityLivingBase.java:1699)

at net.minecraft.entity.EntityLivingBase.onLivingUpdate(EntityLivingBase.java:2026)

at net.minecraft.entity.EntityLiving.onLivingUpdate(EntityLiving.java:449)

at net.minecraft.entity.EntityAgeable.onLivingUpdate(EntityAgeable.java:173)

at net.minecraft.entity.EntityLivingBase.onUpdate(EntityLivingBase.java:1828)

at net.minecraft.entity.EntityLiving.onUpdate(EntityLiving.java:273)

at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:2031)

at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:758)

at net.minecraft.world.World.updateEntity(World.java:1997)

at net.minecraft.world.World.updateEntities(World.java:1823)

at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:587)

at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:775)

at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:669)

at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:171)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:540)

at java.lang.Thread.run(Unknown Source)

A detailed walkthrough of the error, its code path and all known details is as follows:

---------------------------------------------------------------------------------------

-- Head --

Stacktrace:

at com.madmodding.space.blocks.AlienCell.onEntityCollidedWithBlock(AlienCell.java:57)

-- Block being collided with --

Details:

Block: space:alienCell

Block location: World: (-640,4,-1553), Chunk: (at 0,0,15 in -40,-98; contains blocks -640,0,-1568 to -625,255,-1553), Region: (-2,-4; contains chunks -64,-128 to -33,-97, blocks -1024,0,-2048 to -513,255,-1537)

Stacktrace:

at net.minecraft.entity.Entity.doBlockCollisions(Entity.java:924)

-- Entity being checked for collision --

Details:

Entity Type: Villager (net.minecraft.entity.passive.EntityVillager)

Entity ID: 230623

Entity Name: Villager

Entity's Exact location: -639.50, 4.67, -1553.29

Entity's Block location: -640.00,4.00,-1554.00 - World: (-640,4,-1554), Chunk: (at 0,0,14 in -40,-98; contains blocks -640,0,-1568 to -625,255,-1553), Region: (-2,-4; contains chunks -64,-128 to -33,-97, blocks -1024,0,-2048 to -513,255,-1537)

Entity's Momentum: 0.00, 0.04, 0.06

Entity's Rider: ~~ERROR~~ NullPointerException: null

Entity's Vehicle: ~~ERROR~~ NullPointerException: null