Hey guys,

 

I have some trouble checking the block below my custom block, I'm checking to see if the block is a stair/slab block or something else. If the block below is a stair/slab, I need it to add a true boolean property to my custom block, and false for everything else.

 

I have tried the code below, and that worked for checking if the block below was a stair, but not if it was a slab. Any help would be very much appreciated.

 

 

 

@Override
public IBlockState onBlockPlaced(World world, BlockPos pos, EnumFacing facing, float hitX, float hitY, float hitZ, int meta, EntityLivingBase placer)
{
IBlockState state = super.onBlockPlaced(world, pos, facing, hitX, hitY, hitZ, meta, placer);
Block block_under = world.getBlockState(pos.down()).getBlock();
if(block_under instanceof BlockSlab) //I have also tried to use BlockHalfWoodSlab, and the other variants of BlockSlab, still didn't work
{
	state = state.withProperty(SLAB_STAIR, true);
}
if(block_under instanceof BlockStairs)
{
	state = state.withProperty(SLAB_STAIR, true);
}
else
	state = state.withProperty(SLAB_STAIR, false);
return state;
}

 

 

 

Also as a little side question, is it in anyway possible to check and see if the stair/slab is the bottom variant, if so, how would I go about doing that?

This is something that should be done in getActualState, take a look at BlockFence for an example.

 

Cool thanks. However this still doesn't make the BlockSlab work. Any idea why, or how I can make it see slabs below?

New updated code

 

 

public IBlockState getActualState(IBlockState state, IBlockAccess world, BlockPos pos)
{
Block block_under = world.getBlockState(pos.down()).getBlock();
if(block_under instanceof BlockSlab)
{
	state = state.withProperty(SLAB_STAIR, true);
}
if(block_under instanceof BlockStairs)
{
	state = state.withProperty(SLAB_STAIR, true);
}
else
	state = state.withProperty(SLAB_STAIR, false);
        return state;
}

 

 

Would need to see more of your code and a more detailed explanation of what's not working.

 

Whole class

 

 

public class ChimneyBlock extends Block
{
public static final PropertyBool SLAB_STAIR = PropertyBool.create("slab_stair");

protected static final double pixel = 1/16D;
protected static final AxisAlignedBB CHIMNEY_BLOCK_AABB = new AxisAlignedBB(2*pixel, 0.0D, 2*pixel, 14*pixel, 1.0D, 14*pixel);
protected static final AxisAlignedBB CHIMNEY_BLOCK_AABB2 = new AxisAlignedBB(2*pixel, -0.5D, 2*pixel, 14*pixel, 1.0D, 14*pixel);

public ChimneyBlock(String name)
{
	super(Material.ROCK);
	this.setUnlocalizedName(name);
	this.setRegistryName(name);
	this.setCreativeTab(CreativeTabs.DECORATIONS);
	this.setDefaultState(this.blockState.getBaseState().withProperty(SLAB_STAIR, Boolean.valueOf(false)));
}

@Override
public boolean isOpaqueCube(IBlockState state)
{
	return false;
}

@Override
public boolean isFullCube(IBlockState state)
{
	return false;
}

@Override
@SideOnly(Side.CLIENT)
    public BlockRenderLayer getBlockLayer()
{
        return BlockRenderLayer.CUTOUT;
}

@Override
public AxisAlignedBB getBoundingBox(IBlockState state, IBlockAccess source, BlockPos pos)
{
	if ((Boolean)state.getValue(SLAB_STAIR).booleanValue() == true)
        {
		return CHIMNEY_BLOCK_AABB2;
        }
	else
        	return CHIMNEY_BLOCK_AABB;
}

@Override
@Nullable
    public AxisAlignedBB getCollisionBoundingBox(IBlockState blockState, World worldIn, BlockPos pos)
{
        return CHIMNEY_BLOCK_AABB;
}

@Override
@SideOnly(Side.CLIENT)
public void randomDisplayTick(IBlockState stateIn, World worldIn, BlockPos pos, Random rand)
{
	for (int i = 0; i < 3; ++i)
	{
		double d0 = (double)pos.getX() + rand.nextDouble();
		double d1 = (double)pos.getY() + rand.nextDouble() * 0.5D + 1.0D;
		double d2 = (double)pos.getZ() + rand.nextDouble();
		worldIn.spawnParticle(EnumParticleTypes.SMOKE_LARGE, d0, d1, d2, 0.0D, 0.0D, 0.0D, new int[0]);
	}
}

@Override
public IBlockState getActualState(IBlockState state, IBlockAccess world, BlockPos pos)
{
	Block block_under = world.getBlockState(pos.down()).getBlock();
	if(block_under instanceof BlockSlab)
	{
		state = state.withProperty(SLAB_STAIR, true);
	}
	if(block_under instanceof BlockStairs)
	{
		state = state.withProperty(SLAB_STAIR, true);
	}
	else
		state = state.withProperty(SLAB_STAIR, false);
        return state;
    }

@Override
public IBlockState onBlockPlaced(World world, BlockPos pos, EnumFacing facing, float hitX, float hitY, float hitZ, int meta, EntityLivingBase placer)
{
	IBlockState state = super.onBlockPlaced(world, pos, facing, hitX, hitY, hitZ, meta, placer);
	return state;
}

@Override
public int getMetaFromState(IBlockState state)
{
	int i = 0;
        
        if (((Boolean)state.getValue(SLAB_STAIR)).booleanValue())
        {
            i |= 8;
        }
        return i;
}

@Override
public IBlockState getStateFromMeta(int meta)
{
	return getDefaultState().withProperty(SLAB_STAIR, Boolean.valueOf((meta) > 0));
}

@Override
protected BlockStateContainer createBlockState()
{
	return new BlockStateContainer(this, new IProperty[] {SLAB_STAIR});
}
}

 

 

 

What's not working is, that when I have a slab below my custom block, is doesn't set it's property to true, as the stair does. And I really don't know why.

Regarding my little side question, I was wondering if anyone here knows if this is possible, and maybe how to do it?

Also as a little side question, is it in anyway possible to check and see if the stair/slab is the bottom variant, if so, how would I go about doing that?

if(block_under instanceof BlockSlab)

{

state = state.withProperty(SLAB_STAIR, true);

}

if(block_under instanceof BlockStairs)

{

state = state.withProperty(SLAB_STAIR, true);

}

else

state = state.withProperty(SLAB_STAIR, false);

        return state;

    }

Ok, let's walk through this assuming there is a slab below.

[*]

block_under

is a

BlockSlab

so execute the if statement: set

state

to

state.withProperty(SLAB_STAIR, true)

.

[*]

block_under

is not a

BlockStair

, so execute the else branch: set

state

to

state.withProperty(SLAB_STAIR, false)

.

End result:

SLAB_STAIR

is set to

false

.

 

I see now... I should use else if on the second if statement, or put both in the same one, right?

Also as a little side question, is it in anyway possible to check and see if the stair/slab is the bottom variant, if so, how would I go about doing that?

BlockSlab

and

BlockStairs

has a property

HALF

, which you can check.

 

I think I understand this, but how would I get the property from block_under? I mean is there a "simple" way of getting it?

 

I know I'm asking a lot here, and I want to thank you for your patience and help

I see now... I should use else if on the second if statement, or put both in the same one, right?

else-if is the correct solution, yes.

 

I think I understand this, but how would I get the property from block_under? I mean is there a "simple" way of getting it?

You need to keep the

IBlockState

, not the

Block

(i.e. don't immediately call

getBlock

). Then you can access all

IBlockState

methods, like

getValue

.

 

I see, thank you