Sending/Creating BossBar

Since there is no BossBar function in PocketMine yet, you have to create this function yourself. Here's a tutorial on how to do it.

I know there is already PLUGINS that have been created such as PocketEssential's OR XenialDan's BossBarAPI. This, however is a completely different tutorial.

First you need to create your Main class, which you can do as such;

Spoiler: Main class

PHP:

use pocketmine\plugin\PluginBase;
use /** YOUR BOSSBAR CLASS THAT WE CREATE OURSELF*/

PHP:

class Main extends PluginBase {

//This is our main class named "Main".
//We now create our function named "getBossBar()" which just returns our BossBar class.

public function getBossBar(){
return new BossBar($this);
}

We now need to create another class named BossEventPacket.

Spoiler: BossEventPacket Class

PHP:

use pocketmine\network\protocol\DataPacket;
use pocketmine\network\protocol\Info;
use pocketmine\utils\Binary;

class BossEventPacket extends DataPacket{

    const BOSS_EVENT_PACKET = 0x4a;

    const NETWORK_ID = self::BOSS_EVENT_PACKET;
      public $eid;
    public $type;

    public function decode(){

    }

    public function encode(){
        $this->reset();
        $this->putEntityId($this->eid);
        $this->putUnsignedVarInt($this->type);

Now we shall create our BossBar class. This class will be named "BossBar".

Spoiler: BossBar class

PHP:

class BossBar {

   private $plugin;

   public function __construct(Main $plugin){
$this->plugin = $plugin;
}
//We have now created our constructor and we are 'linked' to the Main class.

//Now, stuff gets complicated!

//We will create 2 functions. "addBar", and "setTitle"

use pocketmine\item\Item;
use pocketmine\network\mcpe\protocol\AddPlayerPacket;
use BossEventPacket;
//Our BossEventPacket class.
//Make sure the path is right
use pocketmine\network\mcpe\protocol\MovePlayerPacket;
use pocketmine\network\mcpe\protocol\SetEntityDataPacket;
use pocketmine\Player;
use pocketmine\network\mcpe\protocol\RemoveEntityPacket;
use pocketmine\Server;
use pocketmine\network\mcpe\protocol\AddEntityPacket;
use pocketmine\entity\Entity;
use pocketmine\utils\UUID;

public function addBar(array $players = null){
        if(empty($players)){
            $players = $this->plugin->getPlayers();
        }
        $eid = Entity::$entityCount++;
        $aepkt = new AddEntityPacket();
        $aepkt->metadata = [Entity::DATA_LEAD_HOLDER => [Entity::DATA_TYPE_LONG, -1], Entity::DATA_FLAG_SILENT => [Entity::DATA_TYPE_BYTE, 1], Entity::DATA_SCALE => [Entity::DATA_TYPE_FLOAT, 0],
            Entity::DATA_BOUNDING_BOX_WIDTH => [Entity::DATA_TYPE_FLOAT, 0], Entity::DATA_BOUNDING_BOX_HEIGHT => [Entity::DATA_TYPE_FLOAT, 0]];
        $aepkt->eid = Entity::$entityCount++;
        $aepkt->type = 52;
        $aepkt->yaw = 0;
        $aepkt->pitch = 0;
        foreach($players as $player){
            $ppkt = clone $aepkt;
            $ppkt->x = $player->x;
            $ppkt->y = $player->y;
            $ppkt->z = $player->z;
            $player->dataPacket($ppkt);
        }
        $pk = new BossEventPacket();
        $pk->state = 0;
        $pk->eid = Entity::$entityCount++;
        Server::getInstance()->broadcastPacket($players, $pk);
        return $eid;
    }


    public function setTitle(int $eid, string $string){
        $players = $this->plugin->getServer()->getOnlinePlayers();
        $pk = new SetEntityDataPacket();
        $pk->metadata = [Entity::DATA_NAMETAG => [Entity::DATA_TYPE_STRING, $string]];
        $pk->eid = $eid;
        Server::getInstance()->broadcastPacket($players, $pk);
        $pkt = new BossEventPacket();
        $pkt->eid = $eid;
        $pkt->state = 500;
        Server::getInstance()->broadcastPacket($players, $pkt);

//We have now created our BossBar. Please read the code to try and understand how this works.
//We can set the text by calling setTitle as such;

/** public function (your function)*/
$this->setTitle(11000,"BossBar Created!")

I hope this has helped you understand. Please give me a like if you have learnt something (anything). Just thought this needed to be out there. It's very complex, however.

I would recommend people to also study PocketEssential's or XenialDan's BossBarAPI.

You should also use a task to repeat the BossBar.

 

I know, I really didn't explain it properly. I'm very sorry. How can I make this into a library?

 

I cannot understand this... please edit & give more explanation. I like that you have put effort into this though!

 

Code:

PocketMine-MP Crash Dump Fri May 5 20:59:52 BST 2017

Error: Class Core\Packets\BossEventPacket contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (pocketmine\network\mcpe\protocol\DataPacket::handle)
File: /plugins/NewCore/src/Core/Packets/BossEventPacket
Line: 28
Type: E_ERROR

THIS CRASH WAS CAUSED BY A PLUGIN
BAD PLUGIN: Core v3.0

Code:
[19]
[20]     }
[21]
[22]     public function encode()
[23]     {
[24]         $this->reset();
[25]         $this->putEntityId($this->eid);
[26]         $this->putUnsignedVarInt($this->type);
[27]     }
[28] }
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38] 

??? This i get after I join my server

 

You do realise that you don't have to include a file that is in the same directory!?

 

Not It is in another folder

 

Look at the original post by @Lowkey.

PHP:

use BossEventPacket;


This tells me that BossEventPacket.php is in the same directory as the BossBar class

 

It is still crashing

 

Read what I said under it! I said you need to make sure your path is right.

 

PHP:

use path\to\BossEventPacket;


 

No need, people would get confused.

 

Eeks! No .php in use statements!

 

LOL

 

My path to BossEventPacket is right so?

 

It would be good if you could update this to reflect the changes in the latest API.

 

Does this plugin have any commands?

 

can I just copy it? Hehe and add some new features?