Greetings,-

 

I am trying to have my block "emulate" being so hot it sets nearby wooden structure on fire.

 

I have looked trough BlockFire and BlockLiquid in attempt to figure out how it's done, but to no success.

 

Am I looking in the right classes even? 

Well I had forgotten to enable ticking on the block... Now to figure out the following error: 

Spoiler

Caused by: java.lang.IllegalArgumentException:

Cannot get property PropertyInteger{name=age, clazz=class java.lang.Integer, values=[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]} as it does not exist in BlockStateContainer{block=ppextreme:tungstenlight, properties=[]}

    at net.minecraft.block.state.BlockStateContainer$StateImplementation.getValue(BlockStateContainer.java:204) ~[BlockStateContainer$StateImplementation.class:?]

 

Set the flag setTickRandomly(true); in your block.

 

Then Override randomTick in your block class.

Create a x,y,z for loop around your block using the givens BlockPos : pos.getX() pos.getY() and pos.getZ() as your origin.

Use worldIn.getBlockState(pos) == Blocks.AIR.getDeraultState() to check if a block is air.
You can then check the block underneath it for not being air using almost the same code in order to get blocks with air over them around your block.

Once you found such a block set it aflame using worldIn.setBlockState(pos, Blocks.FIRE.getDefaultState())

 

BUT WAIT! That sets all blocks on fire every time a random tick happens!

 

Use the given `random` to only set a couple blocks aflame like this:

if (random.nextFloat() < 0.1f) {
    worldIn.setBlockState(pos, Blocks.FIRE.getDefaultState());
}

 

Where the floating point number is the chance of a block catching fire.

Edited September 5, 20178 yr by Busti
Formatting

29 minutes ago, PlayPrey said:

Well I had forgotten to enable ticking on the block... Now to figure out the following error: 

  Hide contents

Caused by: java.lang.IllegalArgumentException:

Cannot get property PropertyInteger{name=age, clazz=class java.lang.Integer, values=[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]} as it does not exist in BlockStateContainer{block=ppextreme:tungstenlight, properties=[]}

    at net.minecraft.block.state.BlockStateContainer$StateImplementation.getValue(BlockStateContainer.java:204) ~[BlockStateContainer$StateImplementation.class:?]

 

As it says, the property "age" doesn't exist in the block "ppextreme:tungstenlight". Does your block have a property called "age", and are you returning the proper block state container in the block's createBlockState method?

1 hour ago, Busti said:

Use worldIn.getBlockState(pos) == Blocks.AIR.getDeraultState() to check if a block is air.

Actually you use use .isAir() instead. Mods may add blocks that they wish to be treated as air (for example, Greg's Lighting's spotlight, which creates a column of blocks that are light sources, but should otherwise be treated as air).

Good point @Draco18s