pocketmine\math\AxisAlignedBB::contract PHP Метод

    public function contract($x, $y, $z)
    {
        $this->minX += $x;
        $this->minY += $y;
        $this->minZ += $z;
        $this->maxX -= $x;
        $this->maxY -= $y;
        $this->maxZ -= $z;
        return $this;
    }