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// ------------------------------------------------------------------------
//
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2005 - 2025 by the deal.II authors
//
// This file is part of the deal.II library.
//
// Part of the source code is dual licensed under Apache-2.0 WITH
// LLVM-exception OR LGPL-2.1-or-later. Detailed license information
// governing the source code and code contributions can be found in
// LICENSE.md and CONTRIBUTING.md at the top level directory of deal.II.
//
// ------------------------------------------------------------------------
#include <deal.II/base/thread_management.h>
#include <deal.II/fe/mapping_q1.h>
#include <deal.II/hp/fe_values.h>
#include <memory>
#include <numeric>
DEAL_II_NAMESPACE_OPEN
namespace hp
{
namespace
{
/**
* Given a quadrature collection, create a vector of quadrature collections
* with each containing one quadrature rule from the input collection.
*/
template <int q_dim>
std::vector<QCollection<q_dim>>
translate(const QCollection<q_dim> &q_collection)
{
std::vector<QCollection<q_dim>> q_collections;
q_collections.reserve(q_collection.size());
for (unsigned int q = 0; q < q_collection.size(); ++q)
q_collections.emplace_back(q_collection[q]);
return q_collections;
}
/**
* Given a vector of quadrature collections, extract the first quadrature
* rule of each collection and construct with these a new collection.
*/
template <int q_dim>
QCollection<q_dim>
translate(const std::vector<QCollection<q_dim>> &q_collections)
{
QCollection<q_dim> result;
for (unsigned int q = 0; q < q_collections.size(); ++q)
result.push_back(q_collections[q][0]);
return result;
}
} // namespace
// -------------------------- FEValuesBase -------------------------
template <int dim, int q_dim, typename FEValuesType>
FEValuesBase<dim, q_dim, FEValuesType>::FEValuesBase(
const MappingCollection<dim, FEValuesType::space_dimension>
&mapping_collection,
const FECollection<dim, FEValuesType::space_dimension> &fe_collection,
const QCollection<q_dim> &q_collection,
const UpdateFlags update_flags)
: fe_collection(&fe_collection)
, mapping_collection(&mapping_collection)
, q_collection(q_collection)
, q_collections(translate(q_collection))
, fe_values_table(fe_collection.size(),
mapping_collection.size(),
q_collection.size())
, present_fe_values_index(numbers::invalid_unsigned_int,
numbers::invalid_unsigned_int,
numbers::invalid_unsigned_int)
, update_flags(update_flags)
{}
template <int dim, int q_dim, typename FEValuesType>
FEValuesBase<dim, q_dim, FEValuesType>::FEValuesBase(
const MappingCollection<dim, FEValuesType::space_dimension>
&mapping_collection,
const FECollection<dim, FEValuesType::space_dimension> &fe_collection,
const std::vector<QCollection<q_dim>> &q_collections,
const UpdateFlags update_flags)
: fe_collection(&fe_collection)
, mapping_collection(&mapping_collection)
, q_collection(translate(q_collections))
, q_collections(q_collections)
, fe_values_table(fe_collection.size(),
mapping_collection.size(),
q_collection.size())
, present_fe_values_index(numbers::invalid_unsigned_int,
numbers::invalid_unsigned_int,
numbers::invalid_unsigned_int)
, update_flags(update_flags)
{}
template <int dim, int q_dim, typename FEValuesType>
FEValuesBase<dim, q_dim, FEValuesType>::FEValuesBase(
const FECollection<dim, FEValuesType::space_dimension> &fe_collection,
const QCollection<q_dim> &q_collection,
const UpdateFlags update_flags)
: FEValuesBase(
dealii::hp::StaticMappingQ1<dim, FEValuesType::space_dimension>::
mapping_collection,
fe_collection,
q_collection,
update_flags)
{}
template <int dim, int q_dim, typename FEValuesType>
FEValuesBase<dim, q_dim, FEValuesType>::FEValuesBase(
const FECollection<dim, FEValuesType::space_dimension> &fe_collection,
const std::vector<QCollection<q_dim>> &q_collection,
const UpdateFlags update_flags)
: FEValuesBase(
dealii::hp::StaticMappingQ1<dim, FEValuesType::space_dimension>::
mapping_collection,
fe_collection,
q_collection,
update_flags)
{}
template <int dim, int q_dim, typename FEValuesType>
FEValuesBase<dim, q_dim, FEValuesType>::FEValuesBase(
const FEValuesBase<dim, q_dim, FEValuesType> &other)
: EnableObserverPointer(other)
, fe_collection(other.fe_collection)
, mapping_collection(other.mapping_collection)
, q_collection(other.q_collection)
, q_collections(other.q_collections)
, fe_values_table(other.fe_values_table.size(0),
other.fe_values_table.size(1),
other.fe_values_table.size(2))
, present_fe_values_index(other.present_fe_values_index)
, update_flags(other.update_flags)
{
// We've already resized the `fe_values_table` correctly above, but right
// now it just contains nullptrs. Create copies of the objects that
// `other.fe_values_table` stores
Threads::TaskGroup<> task_group;
for (unsigned int fe_index = 0; fe_index < other.fe_values_table.size(0);
++fe_index)
for (unsigned int m_index = 0; m_index < other.fe_values_table.size(1);
++m_index)
for (unsigned int q_index = 0; q_index < other.fe_values_table.size(2);
++q_index)
if (other.fe_values_table[fe_index][m_index][q_index].get() !=
nullptr)
task_group += Threads::new_task([&, fe_index, m_index, q_index]() {
fe_values_table[fe_index][m_index][q_index] =
std::make_unique<FEValuesType>((*mapping_collection)[m_index],
(*fe_collection)[fe_index],
q_collections[q_index],
update_flags);
});
task_group.join_all();
}
template <int dim, int q_dim, typename FEValuesType>
FEValuesType &
FEValuesBase<dim, q_dim, FEValuesType>::select_fe_values(
const unsigned int fe_index,
const unsigned int mapping_index,
const unsigned int q_index)
{
AssertIndexRange(fe_index, fe_collection->size());
AssertIndexRange(mapping_index, mapping_collection->size());
AssertIndexRange(q_index, q_collections.size());
// set the triple of indices that we want to work with
present_fe_values_index = {fe_index, mapping_index, q_index};
// first check whether we already have an object for this particular
// combination of indices
if (fe_values_table(present_fe_values_index).get() == nullptr)
fe_values_table(present_fe_values_index) =
std::make_unique<FEValuesType>((*mapping_collection)[mapping_index],
(*fe_collection)[fe_index],
q_collections[q_index],
update_flags);
// now there definitely is one!
return *fe_values_table(present_fe_values_index);
}
template <int dim, int q_dim, typename FEValuesType>
void
FEValuesBase<dim, q_dim, FEValuesType>::precalculate_fe_values(
const std::vector<unsigned int> &fe_indices,
const std::vector<unsigned int> &mapping_indices,
const std::vector<unsigned int> &q_indices)
{
AssertDimension(fe_indices.size(), mapping_indices.size());
AssertDimension(fe_indices.size(), q_indices.size());
Threads::TaskGroup<> task_group;
for (unsigned int i = 0; i < fe_indices.size(); ++i)
{
const unsigned int fe_index = fe_indices[i],
mapping_index = mapping_indices[i],
q_index = q_indices[i];
AssertIndexRange(fe_index, fe_collection->size());
AssertIndexRange(mapping_index, mapping_collection->size());
AssertIndexRange(q_index, q_collections.size());
task_group +=
Threads::new_task([&, fe_index, mapping_index, q_index]() {
fe_values_table[fe_index][mapping_index][q_index] =
std::make_unique<FEValuesType>(
(*mapping_collection)[mapping_index],
(*fe_collection)[fe_index],
q_collections[q_index],
update_flags);
});
}
task_group.join_all();
}
template <int dim, int q_dim, typename FEValuesType>
void
FEValuesBase<dim, q_dim, FEValuesType>::precalculate_fe_values()
{
const unsigned int size = fe_collection->size();
std::vector<unsigned int> indices(size);
std::iota(indices.begin(), indices.end(), 0);
precalculate_fe_values(/*fe_indices=*/indices,
/*mapping_indices=*/
(mapping_collection->size() > 1) ?
indices :
std::vector<unsigned int>(size, 0),
/*q_indices=*/
(q_collections.size() > 1) ?
indices :
std::vector<unsigned int>(size, 0));
}
} // namespace hp
namespace hp
{
// -------------------------- FEValues -------------------------
template <int dim, int spacedim>
FEValues<dim, spacedim>::FEValues(
const MappingCollection<dim, spacedim> &mapping,
const FECollection<dim, spacedim> &fe_collection,
const QCollection<dim> &q_collection,
const UpdateFlags update_flags)
: hp::FEValuesBase<dim, dim, dealii::FEValues<dim, spacedim>>(mapping,
fe_collection,
q_collection,
update_flags)
{}
template <int dim, int spacedim>
FEValues<dim, spacedim>::FEValues(
const FECollection<dim, spacedim> &fe_collection,
const QCollection<dim> &q_collection,
const UpdateFlags update_flags)
: hp::FEValuesBase<dim, dim, dealii::FEValues<dim, spacedim>>(fe_collection,
q_collection,
update_flags)
{}
template <int dim, int spacedim>
template <bool lda>
void
FEValues<dim, spacedim>::reinit(
const TriaIterator<DoFCellAccessor<dim, spacedim, lda>> &cell,
const unsigned int q_index,
const unsigned int mapping_index,
const unsigned int fe_index)
{
// determine which indices we should actually use
unsigned int real_q_index = q_index, real_mapping_index = mapping_index,
real_fe_index = fe_index;
if (real_q_index == numbers::invalid_unsigned_int)
{
if (this->q_collections.size() > 1)
real_q_index = cell->active_fe_index();
else
real_q_index = 0;
}
if (real_mapping_index == numbers::invalid_unsigned_int)
{
if (this->mapping_collection->size() > 1)
real_mapping_index = cell->active_fe_index();
else
real_mapping_index = 0;
}
if (real_fe_index == numbers::invalid_unsigned_int)
real_fe_index = cell->active_fe_index();
// some checks
AssertIndexRange(real_q_index, this->q_collections.size());
AssertIndexRange(real_mapping_index, this->mapping_collection->size());
AssertIndexRange(real_fe_index, this->fe_collection->size());
// now finally actually get the corresponding object and initialize it
this->select_fe_values(real_fe_index, real_mapping_index, real_q_index)
.reinit(cell);
}
template <int dim, int spacedim>
void
FEValues<dim, spacedim>::reinit(
const typename Triangulation<dim, spacedim>::cell_iterator &cell,
const unsigned int q_index,
const unsigned int mapping_index,
const unsigned int fe_index)
{
// determine which indices we should actually use
unsigned int real_q_index = q_index, real_mapping_index = mapping_index,
real_fe_index = fe_index;
if (real_q_index == numbers::invalid_unsigned_int)
real_q_index = 0;
if (real_mapping_index == numbers::invalid_unsigned_int)
real_mapping_index = 0;
if (real_fe_index == numbers::invalid_unsigned_int)
real_fe_index = 0;
// some checks
AssertIndexRange(real_q_index, this->q_collections.size());
AssertIndexRange(real_mapping_index, this->mapping_collection->size());
AssertIndexRange(real_fe_index, this->fe_collection->size());
// now finally actually get the corresponding object and initialize it
this->select_fe_values(real_fe_index, real_mapping_index, real_q_index)
.reinit(cell);
}
// -------------------------- FEFaceValues -------------------------
template <int dim, int spacedim>
FEFaceValues<dim, spacedim>::FEFaceValues(
const hp::MappingCollection<dim, spacedim> &mapping,
const hp::FECollection<dim, spacedim> &fe_collection,
const hp::QCollection<dim - 1> &q_collection,
const UpdateFlags update_flags)
: hp::FEValuesBase<dim, dim - 1, dealii::FEFaceValues<dim, spacedim>>(
mapping,
fe_collection,
q_collection,
update_flags)
{}
template <int dim, int spacedim>
FEFaceValues<dim, spacedim>::FEFaceValues(
const hp::MappingCollection<dim, spacedim> &mapping,
const hp::FECollection<dim, spacedim> &fe_collection,
const std::vector<hp::QCollection<dim - 1>> &q_collection,
const UpdateFlags update_flags)
: hp::FEValuesBase<dim, dim - 1, dealii::FEFaceValues<dim, spacedim>>(
mapping,
fe_collection,
q_collection,
update_flags)
{}
template <int dim, int spacedim>
FEFaceValues<dim, spacedim>::FEFaceValues(
const hp::FECollection<dim, spacedim> &fe_collection,
const hp::QCollection<dim - 1> &q_collection,
const UpdateFlags update_flags)
: hp::FEValuesBase<dim, dim - 1, dealii::FEFaceValues<dim, spacedim>>(
fe_collection,
q_collection,
update_flags)
{}
template <int dim, int spacedim>
FEFaceValues<dim, spacedim>::FEFaceValues(
const hp::FECollection<dim, spacedim> &fe_collection,
const std::vector<hp::QCollection<dim - 1>> &q_collection,
const UpdateFlags update_flags)
: hp::FEValuesBase<dim, dim - 1, dealii::FEFaceValues<dim, spacedim>>(
fe_collection,
q_collection,
update_flags)
{}
template <int dim, int spacedim>
template <bool lda>
void
FEFaceValues<dim, spacedim>::reinit(
const TriaIterator<DoFCellAccessor<dim, spacedim, lda>> &cell,
const unsigned int face_no,
const unsigned int q_index,
const unsigned int mapping_index,
const unsigned int fe_index)
{
// determine which indices we
// should actually use
unsigned int real_q_index = q_index, real_mapping_index = mapping_index,
real_fe_index = fe_index;
if (real_q_index == numbers::invalid_unsigned_int)
{
if (this->q_collections.size() > 1)
real_q_index = cell->active_fe_index();
else
real_q_index = 0;
}
if (real_mapping_index == numbers::invalid_unsigned_int)
{
if (this->mapping_collection->size() > 1)
real_mapping_index = cell->active_fe_index();
else
real_mapping_index = 0;
}
if (real_fe_index == numbers::invalid_unsigned_int)
real_fe_index = cell->active_fe_index();
// some checks
AssertIndexRange(real_q_index, this->q_collections.size());
AssertIndexRange(real_mapping_index, this->mapping_collection->size());
AssertIndexRange(real_fe_index, this->fe_collection->size());
// now finally actually get the corresponding object and initialize it
this->select_fe_values(real_fe_index, real_mapping_index, real_q_index)
.reinit(cell, face_no);
}
template <int dim, int spacedim>
template <bool lda>
void
FEFaceValues<dim, spacedim>::reinit(
const TriaIterator<DoFCellAccessor<dim, spacedim, lda>> &cell,
const typename Triangulation<dim, spacedim>::face_iterator &face,
const unsigned int q_index,
const unsigned int mapping_index,
const unsigned int fe_index)
{
const auto face_n = cell->face_iterator_to_index(face);
reinit(cell, face_n, q_index, mapping_index, fe_index);
}
template <int dim, int spacedim>
void
FEFaceValues<dim, spacedim>::reinit(
const typename Triangulation<dim, spacedim>::cell_iterator &cell,
const unsigned int face_no,
const unsigned int q_index,
const unsigned int mapping_index,
const unsigned int fe_index)
{
// determine which indices we
// should actually use
unsigned int real_q_index = q_index, real_mapping_index = mapping_index,
real_fe_index = fe_index;
if (real_q_index == numbers::invalid_unsigned_int)
real_q_index = 0;
if (real_mapping_index == numbers::invalid_unsigned_int)
real_mapping_index = 0;
if (real_fe_index == numbers::invalid_unsigned_int)
real_fe_index = 0;
// some checks
AssertIndexRange(real_q_index, this->q_collections.size());
AssertIndexRange(real_mapping_index, this->mapping_collection->size());
AssertIndexRange(real_fe_index, this->fe_collection->size());
// now finally actually get the corresponding object and initialize it
this->select_fe_values(real_fe_index, real_mapping_index, real_q_index)
.reinit(cell, face_no);
}
template <int dim, int spacedim>
void
FEFaceValues<dim, spacedim>::reinit(
const typename Triangulation<dim, spacedim>::cell_iterator &cell,
const typename Triangulation<dim, spacedim>::face_iterator &face,
const unsigned int q_index,
const unsigned int mapping_index,
const unsigned int fe_index)
{
const auto face_n = cell->face_iterator_to_index(face);
reinit(cell, face_n, q_index, mapping_index, fe_index);
}
// -------------------------- FESubfaceValues -------------------------
template <int dim, int spacedim>
FESubfaceValues<dim, spacedim>::FESubfaceValues(
const hp::MappingCollection<dim, spacedim> &mapping,
const hp::FECollection<dim, spacedim> &fe_collection,
const hp::QCollection<dim - 1> &q_collection,
const UpdateFlags update_flags)
: hp::FEValuesBase<dim, dim - 1, dealii::FESubfaceValues<dim, spacedim>>(
mapping,
fe_collection,
q_collection,
update_flags)
{}
template <int dim, int spacedim>
FESubfaceValues<dim, spacedim>::FESubfaceValues(
const hp::FECollection<dim, spacedim> &fe_collection,
const hp::QCollection<dim - 1> &q_collection,
const UpdateFlags update_flags)
: hp::FEValuesBase<dim, dim - 1, dealii::FESubfaceValues<dim, spacedim>>(
fe_collection,
q_collection,
update_flags)
{}
template <int dim, int spacedim>
template <bool lda>
void
FESubfaceValues<dim, spacedim>::reinit(
const TriaIterator<DoFCellAccessor<dim, spacedim, lda>> &cell,
const unsigned int face_no,
const unsigned int subface_no,
const unsigned int q_index,
const unsigned int mapping_index,
const unsigned int fe_index)
{
// determine which indices we should actually use
unsigned int real_q_index = q_index, real_mapping_index = mapping_index,
real_fe_index = fe_index;
if (real_q_index == numbers::invalid_unsigned_int)
{
if (this->q_collections.size() > 1)
real_q_index = cell->active_fe_index();
else
real_q_index = 0;
}
if (real_mapping_index == numbers::invalid_unsigned_int)
{
if (this->mapping_collection->size() > 1)
real_mapping_index = cell->active_fe_index();
else
real_mapping_index = 0;
}
if (real_fe_index == numbers::invalid_unsigned_int)
real_fe_index = cell->active_fe_index();
// some checks
AssertIndexRange(real_q_index, this->q_collections.size());
AssertIndexRange(real_mapping_index, this->mapping_collection->size());
AssertIndexRange(real_fe_index, this->fe_collection->size());
// now finally actually get the corresponding object and initialize it
this->select_fe_values(real_fe_index, real_mapping_index, real_q_index)
.reinit(cell, face_no, subface_no);
}
template <int dim, int spacedim>
void
FESubfaceValues<dim, spacedim>::reinit(
const typename Triangulation<dim, spacedim>::cell_iterator &cell,
const unsigned int face_no,
const unsigned int subface_no,
const unsigned int q_index,
const unsigned int mapping_index,
const unsigned int fe_index)
{
// determine which indices we should actually use
unsigned int real_q_index = q_index, real_mapping_index = mapping_index,
real_fe_index = fe_index;
if (real_q_index == numbers::invalid_unsigned_int)
real_q_index = 0;
if (real_mapping_index == numbers::invalid_unsigned_int)
real_mapping_index = 0;
if (real_fe_index == numbers::invalid_unsigned_int)
real_fe_index = 0;
// some checks
AssertIndexRange(real_q_index, this->q_collections.size());
AssertIndexRange(real_mapping_index, this->mapping_collection->size());
AssertIndexRange(real_fe_index, this->fe_collection->size());
// now finally actually get the corresponding object and initialize it
this->select_fe_values(real_fe_index, real_mapping_index, real_q_index)
.reinit(cell, face_no, subface_no);
}
} // namespace hp
// explicit instantiations
#include "hp/fe_values.inst"
DEAL_II_NAMESPACE_CLOSE
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