cDbScan::cDbScan(list<cPoint> data, float eps, int minpts)
{
    while(data.size() > 0)
    {
        list<cPoint> cluster_list;
        cluster_list.push_back(*data.begin());
        data.erase(data.begin());

        for(list<cPoint>::iterator it = cluster_list.begin();it != cluster_list.end();it++)
        {
            for(list<cPoint>::iterator main_it = data.begin();main_it != data.end();main_it++)
            {

                if((*it).dist2(*main_it) < eps*eps)
                {
                    cluster_list.push_back(*main_it);
                    data.erase(main_it);
                }
            }
        }

        if(cluster_list.size() >= minpts)
        {
            this->push_back(cCluster(cluster_list));
        }

        cluster_list.empty();
    }
}