Method compute_and_drop_zero_dim

src/MeshFactory.cpp:170–192

}

void MeshFactory::compute_and_drop_zero_dim() {
    const size_t num_vertices = m_mesh->get_num_vertices();
    if (num_vertices == 0) return;
    int zero_dim = m_mesh->get_geometry()->project_out_zero_dim();
    if (zero_dim < 0) return;
    const char axis[3] = {'X', 'Y', 'Z'};
    std::cerr << "Dropping " << axis[zero_dim]
        << " coordinate because flat geometry." << std::endl;
    std::vector<std::string> attr_names = m_mesh->get_attribute_names();
    for (auto itr = attr_names.begin(); itr != attr_names.end(); itr++) {
        VectorF& attr = m_mesh->get_attribute(*itr);
        if (attr.size() == num_vertices * 3) {
            VectorF reduced_attr(num_vertices * 2);
            for (size_t i=0; i<num_vertices; i++) {
                reduced_attr[i*2  ] = (zero_dim == 0) ?
                    attr[i*3+1] : attr[i*3];
                reduced_attr[i*2+1] = (zero_dim == 2) ?
                    attr[i*3+1] : attr[i*3+2];
            }
            m_mesh->set_attribute(*itr, reduced_attr);
        }
    }
}