/** Remove all edges of nodes which corresponding face has not been seen in any texture view. */
void
isolate_unseen_faces(UniGraph * graph, ST const & data_costs) {
int num_unseen_faces = 0;
for (std::uint32_t i = 0; i < data_costs.cols(); i++) {
ST::Column const & data_costs_for_face = data_costs.col(i);
if (data_costs_for_face.size() == 0) {
num_unseen_faces++;
// get all the adjacent facets of the i-the facet // each facet is corresponding to
// the a node in the UnifindGraph
std::vector<std::size_t> const & adj_nodes = graph->get_adj_nodes(i);
for (std::size_t j = 0; j < adj_nodes.size(); j++)
graph->remove_edge(i, adj_nodes[j]);
}
}
std::cout << "\t" << num_unseen_faces << " faces have not been seen by a view." << std::endl;
}
