Tutorial Create a sphere/hemisphere off of particles.

The last thread I made on creating a sphere of particles wasn't that good. It was based on lines and looked... well, not that good. (Also was a performance killer).
About around 2 weeks ago, I and @Skullex were working on creating several particle effects by referring to mostly bukkit plugins. That day itself, I had figured out a much better way of making something what you can actually call a sphere.

Firstly, we will be adding the particle on random places rather than in a line, like in my old post. I've already ported a function for it. This function will provide us the base of our sphere's circumference.

PHP:

    public static function getRandomVector() : Vector3
    {
        $x = 0; $y = 0; $z = 0;
        $x = rand()/getrandmax() * 2 - 1;
        $y = rand()/getrandmax() * 2 - 1;
        $z = rand()/getrandmax() * 2 - 1;
        $v = new Vector3($x, $y, $z);
        return $v->normalize();
    }


Now that that's done, we need to select a region for our (hollow) sphere. This was easier than I'd ever expect. As simple as:

PHP:

Vector3::multiply(CircleRadius);


To make it hollow, all you need to do is get the modulus of Vector3::$y.
That's it. I've attached an image of what the result looks like.

Spoiler: Full code

This code should be ran in a repeating task (delay: 1 tick, recommended).

Arguments:
Location $location: The center of the sphere.
bool $sphere: Whether to create a sphere or a hemisphere. [true = sphere, false = hemisphere].

PHP:

    private $radius = 3;
    private $particles = 50;
    private $location, $level;
    private $sphere = false;

    public function __construct(Location &$location, bool $sphere)
    {
        $this->level = $location->getLevel();
        $this->location = &$location;
        $this->sphere = $sphere;
    }

    private static function getRandomVector() : Vector3
    {
        $x = 0; $y = 0; $z = 0;
        $x = rand()/getrandmax() * 2 - 1;
        $y = rand()/getrandmax() * 2 - 1;
        $z = rand()/getrandmax() * 2 - 1;
        $v = new Vector3($x, $y, $z);
        return $v->normalize();
    }

    public function onRun($tick) {
        for ($i = 0; $i < $this->particles; ++$i) {
            $vector = self::getRandomVector()->multiply($this->radius);
            if (!$this->sphere) {
                $vector->y = abs($vector->getY());
            }
            $this->level->addParticle(new FlameParticle($this->location->add($vector->x, $vector->y, $vector->z)));
            $this->location->add($vector->x, $vector->y, $vector->z);
        }
    }


Spoiler: Image

 

Absolutely amazing... I thought this was only possible on Nukkit!

 

True, should've had a thought about that.

 

my baa.d

 

It dosn't work

 

Why? Any error or why

 

No i join at my Server with the Code

 

WTF and what dont work show your code

 

This Code dosn't work

PHP:

use pocketmine\plugin\PluginBase;
use pocketmine\math\Vector3;
use pocketmine\level\particle\FlameParticle;;

class Main extends PluginBase {

    private $radius = 3;
    private $particles = 50;
    private $location, $level;
    private $sphere = false;

    public function __construct(Location &$location, bool $sphere)
    {
        $this->level = $location->getLevel();
        $this->location = &$location;
        $this->sphere = $sphere;
    }

    private static function getRandomVector() : Vector3
    {
        $x = 0; $y = 0; $z = 0;
        $x = (float)rand()/(float)getrandmax() * 2 - 1;
        $y = (float)rand()/(float)getrandmax() * 2 - 1;
        $z = (float)rand()/(float)getrandmax() * 2 - 1;
        $v = new Vector3($x, $y, $z);
        return $v->normalize();
    }

    public function onRun($tick) {
        for ($i = 0; $i < $this->particles; ++$i) {
            $vector = self::getRandomVector()->multiply($this->radius);
            if (!$this->sphere) {
                $vector->y = abs($vector->getY());
            }
            $this->level->addParticle(new FlameParticle($this->location->add($vector->x, $vector->y, $vector->z)));
            $this->location->add($vector->x, $vector->y, $vector->z);
        }
    }
}

 

and have you registred task in main file?

 

No, how can i register tasks?