+ // generate points
+ string_list pt_materials = obj.get_pt_materials();
+ group_list pts_v = obj.get_pts_v();
+ group_list pts_n = obj.get_pts_n();
+ for ( i = 0; i < (int)pts_v.size(); ++i ) {
+ material = pt_materials[i];
+ vertex_index = pts_v[i];
+ normal_index = pts_n[i];
+ cout << "# usemtl " << material << endl;
+ cout << "pt ";
+ for ( j = 0; j < (int)vertex_index.size(); ++j ) {
+ cout << vertex_index[j] << "/" << normal_index[j] << " ";
+ }
+ cout << endl;
+ }
+