Final location of a falling anvil?

Hi guys, i'm doing a traps plugin but i get stuck in the falling alvils, i can create an anvil over player to hurt him, but how can i delete the anvil when falls? i don't know how to fill a variable with the anvil final location or something

Code:

Block playerlocation = playerlocation.getLocation().add(0, +5, 0).getBlock();
 
then
 
            playerlocation.setType(Material.ANVIL);
 
then???
 
location???.setType(Material.Air);

Thanks!

 

Code:

new BukkitRunnable() {
                            public void run() {
                                if (fblock.getVelocity().equals(new Vector(0, 0, 0))) {
                                    plugin.getServer().getPluginManager().callEvent(new PlagueSpreadEvent(fblock.getLocation().getBlock(), event.getSource()));
                                    this.cancel();
                                }
                            }
                        }.runTaskTimer(plugin, 1 * 20, 1 * 20);

This is the code I use to find the final location of a falling block.

 

https://github.com/Bukkit/CraftBukkit/commit/8ab8744ebde4eb5c348e6a47826091a5a355ec8b
So when spawning: Save the UUID.
When the event fires compare UUIDs and if they match you have the block!

Ofc. this needs garbage collecting as some FallingBlocks may be removed before firering the event, but same goes for the solution above.

BTW: What is a BukkitRunnable? Did I miss something?

 

Another way:
Every time you spawn an anvil, save what chunk it is in an arraylist.

Then loop through all the blocks in the chunk, and if its an avil, set it to air!



Heres how you loop through a chunk:

for (int x = 0; x < 16; x++) {
for (int z = 0; z < 16; z++) {
for (int y = 0; y < 128; y++) {
//Code
}
}
}

 

skipperguy12 Well, that solution would create memory leaks + be inefficient. Why periodically check 65536 blocks (per chunk!) if you could just relax and wait for the event to be called?

 

Yes... the chunk sollution has a bit bad performance, but is an option, i don't understand how to do the UUID thing XD

 

Goty_Metal
UUID uuid = yourSpawnedFallingBlock.getUniqueId();
Then just save it, to a HashMap, for example:
map.add(uuid);
later on, check:

Code:java

if(map.contains(entity.getUniqueId())
{
    // Match!
    ...
    map.remove(entity.getUniqueId());
}

WAIT... Actually I see you don't spawn the anvil as FallingBlock, you just place it as normal block. Spawn it as entity instead! Something like
FallingBlock fb = world.spawnFallingBlock(loc, Material.ANVIL, (byte)0);

 

Its an abstract class that implements Runnable, implemented in the Bukkit API. It contains methods to call it like you normally do, and also a method that allows you to cancel the task (so you can easily cancel a repeated task from the inside)

 

fireblast709 Wow, thanks. I really must have missed this. Let's just hope it's not that long there.

 

V10lator know it myself for a short time as well ;3. I am actually wondering when it was implemented, as it is pretty useful

 

Ok i'm doing with the spawn thing you said,, what's the byte value??? thanks!

Can't add it in a hashmap, it says "the method add UUID is underfined for the type map"

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Goty_Metal The byte value is the blocks data. As most blocks don't have (use) data 0 should be fine.

//EDIT: For a map it's put, but a map has key -> value pairs, which isn't needed here. Use a HashSet instead.

 

Sorry it's true maps/hashmaps it's put, and add for hashsets, thanks

Ok i get it to work, i spawned and deleted it from hashset and transformed into air (deleted the block) after seconds... the huge problem is the spawned block doesn't make damage (as a normal alvil does).

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Goty_Metal Damn, I hoped this wouldn't happen... Let me check NMS code... Okay, there is a boolean but it's not accessible through bukkits API. So first off complain here: https://github.com/Bukkit/CraftBukkit/commit/8f12382e8efc8c39a919af9180dd884caf3720ff Then kick out the bukkit.jar from your build path and add the craftbukkit.jar. Then cast to CB block, then get the NMS block, then use a setter there to manipulate. Should look something like this:

Code:java

FallingBlock anvil = world.spawnFallingBlock(loc, Material.ANVIL, (byte)0);
((CraftFallingSand)anvil).getHandle().e(true);
set.add(e.getUniqueId());
...

To explain the one magic line: First we cast to CraftFallingSand (yes, the name is old and deprecated...) then we get the NMS EntityFallingBlock with getHandle() and finally we call it's e function to manipulate the boolean.

 

I think.. it could be simple to get the player damaged like:

jug.damage(5);

XD

 

Goty_Metal then we need a FlyingBlockMoveEvent to pass the moment a anvil reaches a player (it can hit you above the ground, too).

 

I just calculated the time the anvil takes to reach the player, so the "effect" is like the damage comes from the anvil, working fine, i hope bukkit add egain this function you said before

 

Goty_Metal The function is there, you can use it if you want to but be warned that you leave the bukkit API!

 

Well i mean, to use it in the standart bukkit api XD thanks