Method with_attribute

src/IO/PLYWriter.cpp:43–45

using namespace PLYWriterHelper;

void PLYWriter::with_attribute(const std::string& attr_name) {
    m_attr_names.push_back(attr_name);
}

void PLYWriter::write_mesh(Mesh& mesh) {
    p_ply ply = ply_create(m_filename.c_str(),