Method merge

src/svgfill/src/svgfill.cpp:498–525

	}

	void merge(const std::vector<int>& edge_indices) {
		if (edge_indices.empty()) {
			return;
		}

		std::list<Halfedge_handle> to_remove;
		auto eit = edge_indices.begin();
		size_t n = 0;
		for (auto it = arr.edges_begin(); it != arr.edges_end(); ++it, ++n) {
			if (n == *eit) {
				++eit;
				to_remove.push_back(it);
				if (eit == edge_indices.end()) {
					break;
				}
			}
		}
		
		for (auto& h : to_remove) {
			/*
			auto v0 = h->source()->point();
			std::cout << CGAL::to_double(v0.cartesian(0)) << " " << CGAL::to_double(v0.cartesian(1)) << std::endl;
			auto v1 = h->target()->point();
			std::cout << CGAL::to_double(v1.cartesian(0)) << " " << CGAL::to_double(v1.cartesian(1)) << std::endl << std::endl;
			*/
			arr.remove_edge(h);
		}
	}

	size_t num_edges() {
		return arr.number_of_edges();