pocketmine\entity\Minecart::getNearestRail PHP Method

    public function getNearestRail()
    {
        $minX = Math::floorFloat($this->boundingBox->minX);
        $minY = Math::floorFloat($this->boundingBox->minY);
        $minZ = Math::floorFloat($this->boundingBox->minZ);
        $maxX = Math::ceilFloat($this->boundingBox->maxX);
        $maxY = Math::ceilFloat($this->boundingBox->maxY);
        $maxZ = Math::ceilFloat($this->boundingBox->maxZ);
        $rails = [];
        for ($z = $minZ; $z <= $maxZ; ++$z) {
            for ($x = $minX; $x <= $maxX; ++$x) {
                for ($y = $minY; $y <= $maxY; ++$y) {
                    $block = $this->level->getBlock($this->temporalVector->setComponents($x, $y, $z));
                    if (in_array($block->getId(), [Block::RAIL, Block::ACTIVATOR_RAIL, Block::DETECTOR_RAIL, Block::POWERED_RAIL])) {
                        $rails[] = $block;
                    }
                }
            }
        }
        $minDistance = PHP_INT_MAX;
        $nearestRail = null;
        foreach ($rails as $rail) {
            $dis = $this->distance($rail);
            if ($dis < $minDistance) {
                $nearestRail = $rail;
                $minDistance = $dis;
            }
        }
        return $nearestRail;
    }