Detecting Redstone Power

I want to call an event when some random block starts being powered by redstone but REDSTONE_CHANGE events are only called when redstone dust/torches/switches and the like change power state. Does anyone have any good way of doing this?

 

Well, for RainbowWool I just bruteforced - every REDSTONE_CHANGE event, I checked all the blocks around if they were a wool type. You're probably best off doing that and seeing if it's a specific material, or you could do random checks every so often on set blocks, and use block.isPowered().

 

Can you tell me what the difference is between block.isBlockPowered() and block.isBlockIndirectlyPowered()?

 

Ummmm... I'm not exactly sure, to be honest. Check the commit logs/javadocs, I guess.

 

The javadocs are useless :S

I've worked it out I think. isBlockPowered() is what you'd expect. isBlockIndirectlyPowered() is like asking "if I replaced this block with redstone dust, would that dust be powered"

Thanks for your help btw.

 

That's OK. Maybe you could help me with hooking into minecraft.server classes? I'm trying to make a workbench plugin, but I can't find out how to tell when it's open, or what it has...

 

Found it.

You would tell when its open simply by detecting when they right clicked on a work bench.

You can tell what is in it with the following:

Code:

((CraftPlayer)somePlayer).getHandle().activeContainer.a.a

That variable holds an array of 9 ItemStacks.

But note: these are of type net.minecraft.server.ItemStack and are NOT the same as the bukkit ones. To get data from them, access the public variables type, amount, data and durability.

For detecting closing of the crafting bench use:

Code:

if( ((CraftPlayer)somePlayer).getHandle().activeContainer == null)

Hope that answers your question.

 

How do I get the result (What comes out)? You're so good at finding the code that does stuff .

 

Thanks

Code:

((CraftPlayer)somePlayer).getHandle().activeContainer.b.a[0]

--- merged: Feb 21, 2011 1:43 PM ---
(And if you want to thank me in your plugin thread I wont complain )

 

Of course . Just remind me if I forget (I probably won't). One last question - how would I check when it is changed? Would I just have to keep checking every so often till its closed?

 

Yeah. There doesn't seem to be an event being called for that. Just make a separate thread and loop inside of there with 50ms sleeps until they close it and there shouldn't be any problems.

 

What if a whole heap of players are opening workbenches. Lag?

 

So long as you make sure to do the looping within a separate thread and so long as you remember to Sleep(50) every time you go round the loop and so long as you remember to make the thread stop when they close the workbench, there is unlikely to be any effect. It's not like whatever you're doing is going to be that processor intensive, right?

 

Not really, but I'm a cautious guy . I haven't done much threading/concurrency in Java yet - just learnt to start coding for bukkit. What would I use to accomplish threading? A timer/scheduled executor service/bukkit schedule?

 

Everything I know about threads I learnt here: http://download.oracle.com/javase/tutorial/essential/concurrency/index.html

Shout up if you have questions or want an example of a plugin that uses threading (I have one).

 

Thanks for the link and your help . I'm assuming the threaded plugin is InfiniteLava?

 

No. It's an unreleased plugin I made for playing midi files.
http://www.youtube.com/watch?v=ha2MBUGiFU0
(The playing of the notes is done within a separate thread)

 

That's an awesome plugin. I'd love to see the source, if it's not too much trouble. Definitely getting credit for your time .

 

I'll send you a message with a link so it doesn't get nicked

 

Don't worry, I won't do anything evil . Are you still working on it?

 

Well, I just made it as a proof of concept and its not especially usable just yet. I might finish and release it. I think the author of craftbook has something similar planned for craftbook though, so I don't want to release it and then it immediately be overshadowed by craftbooks version if you know what I mean.

 

I see. You could release it targeted for those who don't want all of craftbook's features, just the MIDI bit? Yours looks pretty easy to set up too.

 

I have so many ideas for plugins I want to make. So many!

 

The activecontainer.a.a field is not visible .

 

Ah. Try activecontainer.a.getContents()

 

activecontainer.a itself is not visible, sorry if that wasn't clear.

 

Ah. Right. You need to cast it as a ContainerWorkbench like this:

Code:

((ContainerWorkbench)((CraftPlayer)somePlayer).getHandle().activeContainer).a.getContents()

 

ItemStack result = ((ContainerWorkbench)ep.activeContainer).b
.getContents()[0]; - This would get the result? Thank you SO MUCH for going through the code. I can never find anything in that mess .

 

It should do, yes.
--- merged: Feb 21, 2011 7:34 PM ---

Sorry. I just looked into this more closely and to detect when they are no longer using the bench you need to check for:

Code:

playerStuff.activeContainer == playerStuff.defaultContainer

rather than null as I said previously.