Function GetAttributes

Common/DataModel/vtkDataSetAttributesFieldList.cxx:253–276

* returns a vector of FieldInfo* where the index is the attribute type and * value is the FieldInfo that will be flagged as that attribute type. * To determine this, we look at the AttributeTypes information accumulated for * inputs and mark an attribute as such only if its tagged as an attribute on * all inputs consistently. */

 * all inputs consistently.
 */
std::array<const detail::FieldInfo*, vtkDataSetAttributes::NUM_ATTRIBUTES> GetAttributes(
  const std::multimap<std::string, FieldInfo>& mmap)
{
  std::array<const detail::FieldInfo*, vtkDataSetAttributes::NUM_ATTRIBUTES> attrs;
  std::fill(attrs.begin(), attrs.end(), nullptr);
  for (auto& pair : mmap)
  {
    const FieldInfo* finfo = &pair.second;

    // check if this field is consistently marked as an attribute in all inputs.
    std::array<bool, vtkDataSetAttributes::NUM_ATTRIBUTES> accumulated_attrs;
    std::fill(accumulated_attrs.begin(), accumulated_attrs.end(), true);
    for (const auto& inattrs : finfo->AttributeTypes)
    {
      std::transform(accumulated_attrs.begin(), accumulated_attrs.end(), inattrs.begin(),
        accumulated_attrs.begin(), std::logical_and<>());
    }

    std::transform(attrs.begin(), attrs.end(), accumulated_attrs.begin(), attrs.begin(),
      [&](const detail::FieldInfo* prev, bool isattr)
      { return isattr && prev == nullptr ? finfo : prev; });
  }
  return attrs;
}

template <typename Container, typename ForwardIt, typename UnaryPredicate>
void remove_if(Container& cont, ForwardIt first, ForwardIt second, UnaryPredicate p)