[1.10] DeleteBlock after 20sec?

terraya · November 15, 2016

Hello@All ,

im asking myself, what would be the function if i would set a block, and after 20sec it should get deleted.

	world.setBlockState(new BlockPos(x +1, y +1, z +1), Blocks.GLASS.getDefaultState());

and to delete i would use

worldIn.destroyBlock(pos, true);

but how to make a delay?

Jay Avery · November 15, 2016

There are a few different ways you could do this.

I think you could use

World#scheduleUpdate

when your block is placed. Then you can just set the delay for the update, and destroy your block in its

updateTick

method. (I've never done this, but it seems to be how redstone components get their updates)

Otherwise, you could create a simple TileEntity for your block which just counts ticks and destroys the block once the limit is reached.

If you are okay with the timing being slightly random, you could instead set

setTickRandomly

to true, and then have your block destroy itself in

updateTick

. Random ticks happen roughly once a minute but there's a lot of random variation.

terraya · November 15, 2016

There are a few different ways you could do this.

I think you could use
World#scheduleUpdate
when your block is placed. Then you can just set the delay for the update, and destroy your block in its
updateTick
method. (I've never done this, but it seems to be how redstone components get their updates)

Otherwise, you could create a simple TileEntity for your block which just counts ticks and destroys the block once the limit is reached.

If you are okay with the timing being slightly random, you could instead set
setTickRandomly
to true, and then have your block destroy itself in
updateTick
. Random ticks happen roughly once a minute but there's a lot of random variation.

hmm sound a bit hard, isnt it?

i was thinking about "Fire" ... i want to take a look on how it work/look like .. :3

becouse it disappear after couple of seconds too so maybe there is an easyer way ?

Jay Avery · November 15, 2016

Look at

BlockFire

- it uses several of these techniques together. It has

setTickRandomly

, then an

updateTick

method which sometimes destroys the block right away and sometimes uses

World#scheduleUpdate

to create fixed duration until the next update.

terraya · November 15, 2016

Look at
BlockFire
- it uses several of these techniques together. It has
setTickRandomly
, then an
updateTick
method which sometimes destroys the block right away and sometimes uses
World#scheduleUpdate
to create fixed duration until the next update.

it look harder then it is ...

bcuz i see additional functions like "canCatchFire" etc and im not so hard into coding ...

i mean, i learned all i know by small tutorials (only minecraft) :3

Draco18s · November 15, 2016

How fire works:

Every time it receives a block update tick, it increments its metadata value by 1.

When it reaches 15 (or its raining, or some other checks) it deletes itself.

terraya · November 15, 2016

How fire works:

Every time it receives a block update tick, it increments its metadata value by 1.

When it reaches 15 (or its raining, or some other checks) it deletes itself.

public void onBlockUpdate()
{
  if (this.ticks <= 0)
  {
    this.ticks = 15;
    //DeleteBlock
  }
  else
  {
    this.ticks -= 1;
  }
}

terraya · November 15, 2016

Blocks are singleton-like, you have to store any data that should not be shared between all of the block in the blockstate ("metadata").

i have found what you mean:

my code looks now like this, but somehow it still doesnt work .. x-x

public class BlockUpdateFireBlockClass extends BlockBush{

    public static final PropertyInteger AGE = PropertyInteger.create("age", 0, 15);
    
public BlockUpdateFireBlockClass (String name,int light, Material materialIn){
	super (materialIn);

	this.setBlockUnbreakable();
	this.setLightLevel(light);
	this.setUnlocalizedName(name);
	this.setTickRandomly(true);	

}

    @SideOnly(Side.CLIENT)
    @Override
    public BlockRenderLayer getBlockLayer()
    {
        return BlockRenderLayer.TRANSLUCENT;
    }
    
    @Override
    public void onEntityCollidedWithBlock(World worldIn, BlockPos pos, IBlockState state, Entity entityIn)
    {
        entityIn.attackEntityFrom(DamageSource.cactus, 5.0F); 
        entityIn.setFire(10);
    }
    
    /**
     * Convert the given metadata into a BlockState for this Block
     */
    public IBlockState getStateFromMeta(int meta)
    {
        return this.getDefaultState().withProperty(AGE, Integer.valueOf(meta));
    }

    /**
     * Convert the BlockState into the correct metadata value
     */
    public int getMetaFromState(IBlockState state)
    {
        return ((Integer)state.getValue(AGE)).intValue();
    }

    protected BlockStateContainer createBlockState()
    {
        return new BlockStateContainer(this, new IProperty[] {AGE});
    }
    
    @Override
    public boolean isOpaqueCube(IBlockState state)
    {
        return false;
    }
    
    @Override
    public boolean isFullCube(IBlockState state)
    {
        return false;
    }

    @Override
    public AxisAlignedBB getCollisionBoundingBox(IBlockState blockState, World worldIn, BlockPos pos)
    {
        return NULL_AABB;
    }
    
    public int quantityDropped(Random random)
    {
        return 0; //Returns 0 item drop on destruction
    }
    
    @Override
    public boolean canPlaceBlockAt(World worldIn, BlockPos pos)
    {
        IBlockState soil = worldIn.getBlockState(pos.down());
        return super.canPlaceBlockAt(worldIn, pos) && soil.getBlock().canSustainPlant(soil, worldIn, pos.down(), net.minecraft.util.EnumFacing.UP, this);
    }
    
    @Override
    protected boolean canSustainBush(IBlockState state)
    {
        return true;
    }
    
    @Override
    public boolean canBlockStay(World worldIn, BlockPos pos, IBlockState state)
    {
        if (state.getBlock() == this) 
        {
            IBlockState soil = worldIn.getBlockState(pos.down());
            return soil.getBlock().canSustainPlant(soil, worldIn, pos.down(), net.minecraft.util.EnumFacing.UP, this);
        }
        return this.canSustainBush(worldIn.getBlockState(pos.down()));
    }

    protected boolean canDie(World worldIn, BlockPos pos)
    {
        return worldIn.isRainingAt(pos) || worldIn.isRainingAt(pos.west()) || worldIn.isRainingAt(pos.east()) || worldIn.isRainingAt(pos.north()) || worldIn.isRainingAt(pos.south());
    }

    public boolean requiresUpdates()
    {
        return false;
    }

    }

Jay Avery · November 15, 2016

Blocks are singleton-like, you have to store any data that should not be shared between all of the block in the blockstate ("metadata").

i have found what you mean:

my code looks now like this, but somehow it still doesnt work .. x-x

public class BlockUpdateFireBlockClass extends BlockBush{

    public static final PropertyInteger AGE = PropertyInteger.create("age", 0, 15);
    
public BlockUpdateFireBlockClass (String name,int light, Material materialIn){
	super (materialIn);

	this.setBlockUnbreakable();
	this.setLightLevel(light);
	this.setUnlocalizedName(name);
	this.setTickRandomly(true);	

}

    @SideOnly(Side.CLIENT)
    @Override
    public BlockRenderLayer getBlockLayer()
    {
        return BlockRenderLayer.TRANSLUCENT;
    }
    
    @Override
    public void onEntityCollidedWithBlock(World worldIn, BlockPos pos, IBlockState state, Entity entityIn)
    {
        entityIn.attackEntityFrom(DamageSource.cactus, 5.0F); 
        entityIn.setFire(10);
    }
    
    /**
     * Convert the given metadata into a BlockState for this Block
     */
    public IBlockState getStateFromMeta(int meta)
    {
        return this.getDefaultState().withProperty(AGE, Integer.valueOf(meta));
    }

    /**
     * Convert the BlockState into the correct metadata value
     */
    public int getMetaFromState(IBlockState state)
    {
        return ((Integer)state.getValue(AGE)).intValue();
    }

    protected BlockStateContainer createBlockState()
    {
        return new BlockStateContainer(this, new IProperty[] {AGE});
    }
    
    @Override
    public boolean isOpaqueCube(IBlockState state)
    {
        return false;
    }
    
    @Override
    public boolean isFullCube(IBlockState state)
    {
        return false;
    }

    @Override
    public AxisAlignedBB getCollisionBoundingBox(IBlockState blockState, World worldIn, BlockPos pos)
    {
        return NULL_AABB;
    }
    
    public int quantityDropped(Random random)
    {
        return 0; //Returns 0 item drop on destruction
    }
    
    @Override
    public boolean canPlaceBlockAt(World worldIn, BlockPos pos)
    {
        IBlockState soil = worldIn.getBlockState(pos.down());
        return super.canPlaceBlockAt(worldIn, pos) && soil.getBlock().canSustainPlant(soil, worldIn, pos.down(), net.minecraft.util.EnumFacing.UP, this);
    }
    
    @Override
    protected boolean canSustainBush(IBlockState state)
    {
        return true;
    }
    
    @Override
    public boolean canBlockStay(World worldIn, BlockPos pos, IBlockState state)
    {
        if (state.getBlock() == this) 
        {
            IBlockState soil = worldIn.getBlockState(pos.down());
            return soil.getBlock().canSustainPlant(soil, worldIn, pos.down(), net.minecraft.util.EnumFacing.UP, this);
        }
        return this.canSustainBush(worldIn.getBlockState(pos.down()));
    }

    protected boolean canDie(World worldIn, BlockPos pos)
    {
        return worldIn.isRainingAt(pos) || worldIn.isRainingAt(pos.west()) || worldIn.isRainingAt(pos.east()) || worldIn.isRainingAt(pos.north()) || worldIn.isRainingAt(pos.south());
    }

    public boolean requiresUpdates()
    {
        return false;
    }

    }

Why do you extend

BlockBush

?

In any case, you still haven't overridden

updateTick

, so although the block is getting random updates it's not doing anything when they arrive.

terraya · November 15, 2016

as written above, i extend "BlockBush" becouse its has to be a block where you should be able to walk through

terraya · November 15, 2016

anyways ... after watching MORE and MORE through the vanilla code...

as diesieben sayd ... its here :

    /**
     * How many world ticks before ticking
     */
    public int tickRate(World worldIn)
    {
        return 30;
    }

    public void updateTick(World worldIn, BlockPos pos, IBlockState state, Random rand)
    {
        if (worldIn.getGameRules().getBoolean("doFireTick"))
        {
            if (!this.canPlaceBlockAt(worldIn, pos))
            {
                worldIn.setBlockToAir(pos);
            }

            Block block = worldIn.getBlockState(pos.down()).getBlock();
            boolean flag = block.isFireSource(worldIn, pos.down(), EnumFacing.UP);

            int i = ((Integer)state.getValue(AGE)).intValue();

            if (!flag && worldIn.isRaining() && this.canDie(worldIn, pos) && rand.nextFloat() < 0.2F + (float)i * 0.03F)
            {
                worldIn.setBlockToAir(pos);
            }
            else
            {
                if (i < 15)
                {
                    state = state.withProperty(AGE, Integer.valueOf(i + rand.nextInt(3) / 2));
                    worldIn.setBlockState(pos, state, 4);
                }

                worldIn.scheduleUpdate(pos, this, this.tickRate(worldIn) + rand.nextInt(10));

                if (!flag)
                {
                    if (!this.canNeighborCatchFire(worldIn, pos))
                    {
                        if (!worldIn.getBlockState(pos.down()).isSideSolid(worldIn, pos.down(), EnumFacing.UP) || i > 3)
                        {
                            worldIn.setBlockToAir(pos);
                        }

                        return;
                    }

                    if (!this.canCatchFire(worldIn, pos.down(), EnumFacing.UP) && i == 15 && rand.nextInt(4) == 0)
                    {
                        worldIn.setBlockToAir(pos);
                        return;
                    }
                }

                boolean flag1 = worldIn.isBlockinHighHumidity(pos);
                int j = 0;

                if (flag1)
                {
                    j = -50;
                }

                this.tryCatchFire(worldIn, pos.east(), 300 + j, rand, i, EnumFacing.WEST);
                this.tryCatchFire(worldIn, pos.west(), 300 + j, rand, i, EnumFacing.EAST);
                this.tryCatchFire(worldIn, pos.down(), 250 + j, rand, i, EnumFacing.UP);
                this.tryCatchFire(worldIn, pos.up(), 250 + j, rand, i, EnumFacing.DOWN);
                this.tryCatchFire(worldIn, pos.north(), 300 + j, rand, i, EnumFacing.SOUTH);
                this.tryCatchFire(worldIn, pos.south(), 300 + j, rand, i, EnumFacing.NORTH);

                for (int k = -1; k <= 1; ++k)
                {
                    for (int l = -1; l <= 1; ++l)
                    {
                        for (int i1 = -1; i1 <= 4; ++i1)
                        {
                            if (k != 0 || i1 != 0 || l != 0)
                            {
                                int j1 = 100;

                                if (i1 > 1)
                                {
                                    j1 += (i1 - 1) * 100;
                                }

                                BlockPos blockpos = pos.add(k, i1, l);
                                int k1 = this.getNeighborEncouragement(worldIn, blockpos);

                                if (k1 > 0)
                                {
                                    int l1 = (k1 + 40 + worldIn.getDifficulty().getDifficultyId() * 7) / (i + 30);

                                    if (flag1)
                                    {
                                        l1 /= 2;
                                    }

                                    if (l1 > 0 && rand.nextInt(j1) <= l1 && (!worldIn.isRaining() || !this.canDie(worldIn, blockpos)))
                                    {
                                        int i2 = i + rand.nextInt(5) / 4;

                                        if (i2 > 15)
                                        {
                                            i2 = 15;
                                        }

                                        worldIn.setBlockState(blockpos, state.withProperty(AGE, Integer.valueOf(i2)), 3);
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }

Jay Avery · November 15, 2016

Right. But BlockBush also does a bunch of other stuff which you probably don't want, like checking for soil underneath the block and various other methods associated with plants. If all you want is for the block to be passable by the player, then all you need to do is (in your class extending

Block

, not

BlockBush

) override

getCollisionBoundingBox

to return

NULL_AABB

.

terraya · November 15, 2016

Right. But BlockBush also does a bunch of other stuff which you probably don't want, like checking for soil underneath the block and various other methods associated with plants. If all you want is for the block to be passable by the player, then all you need to do is (in your class extending
Block
, not
BlockBush
) override
getCollisionBoundingBox
to return
NULL_AABB
.

tried it already but its not working, or i maybe tried it wrong x), anyways, thanks!

Jay Avery · November 15, 2016

anyways ... after watching MORE and MORE through the vanilla code...

as diesieben sayd ... its here :

    /**
     * How many world ticks before ticking
     */
    public int tickRate(World worldIn)
    {
        return 30;
    }

    public void updateTick(World worldIn, BlockPos pos, IBlockState state, Random rand)
    {
        if (worldIn.getGameRules().getBoolean("doFireTick"))
        {
            if (!this.canPlaceBlockAt(worldIn, pos))
            {
                worldIn.setBlockToAir(pos);
            }

            Block block = worldIn.getBlockState(pos.down()).getBlock();
            boolean flag = block.isFireSource(worldIn, pos.down(), EnumFacing.UP);

            int i = ((Integer)state.getValue(AGE)).intValue();

            if (!flag && worldIn.isRaining() && this.canDie(worldIn, pos) && rand.nextFloat() < 0.2F + (float)i * 0.03F)
            {
                worldIn.setBlockToAir(pos);
            }
            else
            {
                if (i < 15)
                {
                    state = state.withProperty(AGE, Integer.valueOf(i + rand.nextInt(3) / 2));
                    worldIn.setBlockState(pos, state, 4);
                }

                worldIn.scheduleUpdate(pos, this, this.tickRate(worldIn) + rand.nextInt(10));

                if (!flag)
                {
                    if (!this.canNeighborCatchFire(worldIn, pos))
                    {
                        if (!worldIn.getBlockState(pos.down()).isSideSolid(worldIn, pos.down(), EnumFacing.UP) || i > 3)
                        {
                            worldIn.setBlockToAir(pos);
                        }

                        return;
                    }

                    if (!this.canCatchFire(worldIn, pos.down(), EnumFacing.UP) && i == 15 && rand.nextInt(4) == 0)
                    {
                        worldIn.setBlockToAir(pos);
                        return;
                    }
                }

                boolean flag1 = worldIn.isBlockinHighHumidity(pos);
                int j = 0;

                if (flag1)
                {
                    j = -50;
                }

                this.tryCatchFire(worldIn, pos.east(), 300 + j, rand, i, EnumFacing.WEST);
                this.tryCatchFire(worldIn, pos.west(), 300 + j, rand, i, EnumFacing.EAST);
                this.tryCatchFire(worldIn, pos.down(), 250 + j, rand, i, EnumFacing.UP);
                this.tryCatchFire(worldIn, pos.up(), 250 + j, rand, i, EnumFacing.DOWN);
                this.tryCatchFire(worldIn, pos.north(), 300 + j, rand, i, EnumFacing.SOUTH);
                this.tryCatchFire(worldIn, pos.south(), 300 + j, rand, i, EnumFacing.NORTH);

                for (int k = -1; k <= 1; ++k)
                {
                    for (int l = -1; l <= 1; ++l)
                    {
                        for (int i1 = -1; i1 <= 4; ++i1)
                        {
                            if (k != 0 || i1 != 0 || l != 0)
                            {
                                int j1 = 100;

                                if (i1 > 1)
                                {
                                    j1 += (i1 - 1) * 100;
                                }

                                BlockPos blockpos = pos.add(k, i1, l);
                                int k1 = this.getNeighborEncouragement(worldIn, blockpos);

                                if (k1 > 0)
                                {
                                    int l1 = (k1 + 40 + worldIn.getDifficulty().getDifficultyId() * 7) / (i + 30);

                                    if (flag1)
                                    {
                                        l1 /= 2;
                                    }

                                    if (l1 > 0 && rand.nextInt(j1) <= l1 && (!worldIn.isRaining() || !this.canDie(worldIn, blockpos)))
                                    {
                                        int i2 = i + rand.nextInt(5) / 4;

                                        if (i2 > 15)
                                        {
                                            i2 = 15;
                                        }

                                        worldIn.setBlockState(blockpos, state.withProperty(AGE, Integer.valueOf(i2)), 3);
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }

Yes... like I've been saying all along, the

updateTick

method is what you need to use if you want your block to act on random ticks.

terraya · November 15, 2016

just tryed to extend a normal block with:

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

it does work to "jump" into the block from "above" but from the sites it block me ..

well anyways, i removed some functionalitys from "BlockBush" , so it work as i wanted already.

thanks@All!

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[1.10] DeleteBlock after 20sec?

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