pocketmine\entity\Entity::checkObstruction PHP Method

    protected function checkObstruction($x, $y, $z)
    {
        $i = Math::floorFloat($x);
        $j = Math::floorFloat($y);
        $k = Math::floorFloat($z);
        $diffX = $x - $i;
        $diffY = $y - $j;
        $diffZ = $z - $k;
        if (Block::$solid[$this->level->getBlockIdAt($i, $j, $k)]) {
            $flag = !Block::$solid[$this->level->getBlockIdAt($i - 1, $j, $k)];
            $flag1 = !Block::$solid[$this->level->getBlockIdAt($i + 1, $j, $k)];
            $flag2 = !Block::$solid[$this->level->getBlockIdAt($i, $j - 1, $k)];
            $flag3 = !Block::$solid[$this->level->getBlockIdAt($i, $j + 1, $k)];
            $flag4 = !Block::$solid[$this->level->getBlockIdAt($i, $j, $k - 1)];
            $flag5 = !Block::$solid[$this->level->getBlockIdAt($i, $j, $k + 1)];
            $direction = -1;
            $limit = 9999;
            if ($flag) {
                $limit = $diffX;
                $direction = 0;
            }
            if ($flag1 and 1 - $diffX < $limit) {
                $limit = 1 - $diffX;
                $direction = 1;
            }
            if ($flag2 and $diffY < $limit) {
                $limit = $diffY;
                $direction = 2;
            }
            if ($flag3 and 1 - $diffY < $limit) {
                $limit = 1 - $diffY;
                $direction = 3;
            }
            if ($flag4 and $diffZ < $limit) {
                $limit = $diffZ;
                $direction = 4;
            }
            if ($flag5 and 1 - $diffZ < $limit) {
                $direction = 5;
            }
            $force = lcg_value() * 0.2 + 0.1;
            if ($direction === 0) {
                $this->motionX = -$force;
                return true;
            }
            if ($direction === 1) {
                $this->motionX = $force;
                return true;
            }
            if ($direction === 2) {
                $this->motionY = -$force;
                return true;
            }
            if ($direction === 3) {
                $this->motionY = $force;
                return true;
            }
            if ($direction === 4) {
                $this->motionZ = -$force;
                return true;
            }
            if ($direction === 5) {
                $this->motionZ = $force;
                return true;
            }
        }
        return false;
    }