pocketmine\math\AxisAlignedBB::calculateZOffset PHP Метод

    public function calculateZOffset(AxisAlignedBB $bb, $z)
    {
        if ($bb->maxX <= $this->minX or $bb->minX >= $this->maxX) {
            return $z;
        }
        if ($bb->maxY <= $this->minY or $bb->minY >= $this->maxY) {
            return $z;
        }
        if ($z > 0 and $bb->maxZ <= $this->minZ) {
            $z1 = $this->minZ - $bb->maxZ;
            if ($z1 < $z) {
                $z = $z1;
            }
        }
        if ($z < 0 and $bb->minZ >= $this->maxZ) {
            $z2 = $this->maxZ - $bb->minZ;
            if ($z2 > $z) {
                $z = $z2;
            }
        }
        return $z;
    }