Function compute_vertex_lookup_grid

tools/Wires/Misc/SymmetryOperators.cpp:10–22

namespace SymmetryOperatorsHelper {
    HashGrid::Ptr compute_vertex_lookup_grid(const MatrixFr& vertices,
            Float cell_size) {
        const size_t num_vertices = vertices.rows();
        const size_t dim = vertices.cols();
        HashGrid::Ptr grid = HashGrid::create(cell_size, dim);

        VectorI v_indices(num_vertices);
        for (size_t i=0; i<num_vertices; i++)
            v_indices[i] = i;

        grid->insert_multiple(v_indices, vertices);
        return grid;
    }

    DupletMap<size_t> create_edge_lookup_map(const MatrixIr& edges) {
        DupletMap<size_t> edge_map;