Load chunk

How can I load all chunks in an radius from coords?

 

Does someone know that?

 

PHP:

// We have $x, $z
// Example:
$x = $player->getX() >> 4; // take 'X' chunk coordinate
$z = $player->getZ() >> 4; // take 'Z' chunk coordinate
$radius = 15;
for ($chunkX = -$radius; $chunkX <= $radius; $chunkX++){
    for ($chunkZ = -$radius; $chunkZ <= $radius; $chunkZ++){
        // if distance <= raduis than load chunk
        if (sqrt($chunkX*$chunkX + $chunkZ*$chunkZ) <= $radius) $level->loadChunk($chunkX + $x, $chunkZ + $z);
    }
}

 

Thanks

 

And do u know how to check if $player is in a radius of 5 blocks from coords?

 

https://en.wikipedia.org/wiki/Euclidean_distance

PHP:

// We have $p - Player and $b - Block
$distance = sqrt(($p->x - $b->x)*($p->x - $b->x) + ($p->y - $b->y)*($p->y - $b->y) + ($p->z -
$b->z)*($p->z - $b->z));
if ($distance <= 5) {
    // todo
}


 

Ok thanks.
Now I tried to knockback the player from $b ($b is a sign)
How can I do it? I tried this:

PHP:

$direction = $player->getDirectionVector();
                                        $x = $direction->getX();
                                        $y = $direction->getY();
                                        $z = $direction->getZ();
                                       
                                        for ($i = 1; $i <= 10; $i++)
                                        {
                                            $player->knockBack($player, 0, $x, $z, -1);
                                        }

 

https://github.com/iTXTech/Genisys/blob/master/src/pocketmine/entity/Living.php#L140