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/**
* file field.hh
*
* @author Till Junge <till.junge@epfl.ch>
*
* @date 07 Sep 2017
*
* @brief header-only implementation of a field for field collections
*
* @section LICENCE
*
* Copyright (C) 2017 Till Junge
*
* µSpectre is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3, or (at
* your option) any later version.
*
* µSpectre is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Emacs; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef FIELD_H
#define FIELD_H
#include <string>
#include <utility>
#include <typeinfo>
#include <vector>
#include <algorithm>
#include <Eigen/Dense>
#include <cmath>
#include <memory>
#include <type_traits>
namespace muSpectre {
namespace internal {
/* ---------------------------------------------------------------------- */
template <class FieldCollection>
class FieldBase
{
protected:
//! constructor
//! unique name (whithin Collection)
//! number of components
//! collection to which this field belongs (eg, material, system)
FieldBase(std::string unique_name,
size_t nb_components,
FieldCollection & collection);
public:
using collection_t = FieldCollection;
//! Copy constructor
FieldBase(const FieldBase &other) = delete;
//! Move constructor
FieldBase(FieldBase &&other) noexcept = delete;
//! Destructor
virtual ~FieldBase() noexcept = default;
//! Copy assignment operator
FieldBase& operator=(const FieldBase &other) = delete;
//! Move assignment operator
FieldBase& operator=(FieldBase &&other) noexcept = delete;
/* ---------------------------------------------------------------------- */
//!Identifying accessors
//! return field name
inline const std::string & get_name() const;
//! return field type
//inline const Field_t & get_type() const;
//! return my collection (for iterating)
inline const FieldCollection & get_collection() const;
//! return my collection (for iterating)
inline const size_t & get_nb_components() const;
//! return type_id of stored type
virtual const std::type_info & get_stored_typeid() const = 0;
virtual size_t size() const = 0;
//! initialise field to zero (do more complicated initialisations through
//! fully typed maps)
virtual void set_zero() = 0;
//! give access to collections
friend FieldCollection;
protected:
/* ---------------------------------------------------------------------- */
//! allocate memory etc
virtual void resize(size_t size) = 0;
const std::string name;
const size_t nb_components;
const FieldCollection & collection;
private:
};
/* ---------------------------------------------------------------------- */
//! declaraton for friending
template <class FieldCollection, typename T, Dim_t NbComponents>
class FieldMap;
/* ---------------------------------------------------------------------- */
template <class FieldCollection, typename T, Dim_t NbComponents>
class TypedFieldBase: public FieldBase<FieldCollection>
{
friend class FieldMap<FieldCollection, T, NbComponents>;
public:
constexpr static auto nb_components{NbComponents};
using Parent = FieldBase<FieldCollection>;
using Parent::collection_t;
using Scalar = T;
using Base = Parent;
//using storage_type = Eigen::Array<T, Eigen::Dynamic, NbComponents>;
using StoredType = Eigen::Array<T, NbComponents, 1>;
using StorageType = std::vector<StoredType,
Eigen::aligned_allocator<StoredType>>;
TypedFieldBase(std::string unique_name,
FieldCollection& collection);
virtual ~TypedFieldBase() = default;
//! return type_id of stored type
virtual const std::type_info & get_stored_typeid() const;
//! initialise field to zero (do more complicated initialisations through
//! fully typed maps)
inline void set_zero() override final;
inline void push_back(const StoredType & value);
template< class... Args>
inline void emplace_back(Args&&... args);
size_t size() const override final;
protected:
inline T* get_ptr_to_entry(const size_t&& index);
inline T& get_ref_to_entry(const size_t&& index);
inline virtual void resize(size_t size) override final;
StorageType array;
};
} // internal
/* ---------------------------------------------------------------------- */
template <class FieldCollection, typename T, Dim_t order, Dim_t dim>
class TensorField: public internal::TypedFieldBase<FieldCollection,
T,
ipow(dim,order)>
{
public:
using Parent = internal::TypedFieldBase<FieldCollection,
T,
ipow(dim,order)>;
using Base = typename Parent::Base;
using Field_p = typename FieldCollection::Field_p;
using component_type = T;
//! Copy constructor
TensorField(const TensorField &other) = delete;
//! Move constructor
TensorField(TensorField &&other) noexcept = delete;
//! Destructor
virtual ~TensorField() noexcept = default;
//! Copy assignment operator
TensorField& operator=(const TensorField &other) = delete;
//! Move assignment operator
TensorField& operator=(TensorField &&other) noexcept = delete;
//! accessors
inline Dim_t get_order() const;
inline Dim_t get_dim() const;
//! factory function
template<class FieldType, class CollectionType, typename... Args>
friend typename FieldType::Base& make_field(std::string unique_name,
CollectionType & collection,
Args&&... args);
protected:
//! constructor protected!
TensorField(std::string unique_name, FieldCollection & collection);
private:
};
/* ---------------------------------------------------------------------- */
template <class FieldCollection, typename T, Dim_t NbRow, Dim_t NbCol=NbRow>
class MatrixField: public internal::TypedFieldBase<FieldCollection,
T,
NbRow*NbCol>
{
public:
using Parent = internal::TypedFieldBase<FieldCollection,
T,
NbRow*NbCol>;
using Base = typename Parent::Base;
using Field_p = std::unique_ptr<internal::FieldBase<FieldCollection>>;
using component_type = T;
//! Copy constructor
MatrixField(const MatrixField &other) = delete;
//! Move constructor
MatrixField(MatrixField &&other) noexcept = delete;
//! Destructor
virtual ~MatrixField() noexcept = default;
//! Copy assignment operator
MatrixField& operator=(const MatrixField &other) = delete;
//! Move assignment operator
MatrixField& operator=(MatrixField &&other) noexcept = delete;
//! accessors
inline Dim_t get_nb_row() const;
inline Dim_t get_nb_col() const;
//! factory function
template<class FieldType, class CollectionType, typename... Args>
friend typename FieldType::Base& make_field(std::string unique_name,
CollectionType & collection,
Args&&... args);
protected:
//! constructor protected!
MatrixField(std::string unique_name, FieldCollection & collection);
private:
};
/* ---------------------------------------------------------------------- */
//! convenience alias
template <class FieldCollection, typename T>
using ScalarField = TensorField<FieldCollection, T, 1, 1>;
/* ---------------------------------------------------------------------- */
// Implementations
namespace internal {
/* ---------------------------------------------------------------------- */
template <class FieldCollection>
FieldBase<FieldCollection>::FieldBase(std::string unique_name,
size_t nb_components_,
FieldCollection & collection_)
:name(unique_name), nb_components(nb_components_),
collection(collection_) {}
/* ---------------------------------------------------------------------- */
template <class FieldCollection>
inline const std::string & FieldBase<FieldCollection>::get_name() const {
return this->name;
}
/* ---------------------------------------------------------------------- */
template <class FieldCollection>
inline const FieldCollection & FieldBase<FieldCollection>::
get_collection() const {
return this->collection;
}
/* ---------------------------------------------------------------------- */
template <class FieldCollection>
inline const size_t & FieldBase<FieldCollection>::
get_nb_components() const {
return this->nb_components;
}
/* ---------------------------------------------------------------------- */
template <class FieldCollection, typename T, Dim_t NbComponents>
TypedFieldBase<FieldCollection, T, NbComponents>::
TypedFieldBase(std::string unique_name, FieldCollection & collection)
:FieldBase<FieldCollection>(unique_name, NbComponents, collection){
static_assert
((std::is_arithmetic<T>::value ||
std::is_same<T, Complex>::value),
"Use TypedFieldBase for integer, real or complex scalars for T");
static_assert(NbComponents > 0,
"Only fields with more than 0 components");
}
/* ---------------------------------------------------------------------- */
//! return type_id of stored type
template <class FieldCollection, typename T, Dim_t NbComponents>
const std::type_info & TypedFieldBase<FieldCollection, T, NbComponents>::
get_stored_typeid() const {
return typeid(T);
}
/* ---------------------------------------------------------------------- */
template<class FieldCollection, typename T, Dim_t NbComponents>
void
TypedFieldBase<FieldCollection, T, NbComponents>::
set_zero() {
std::fill(this->array.begin(), this->array.end(), T{});
}
/* ---------------------------------------------------------------------- */
template <class FieldCollection, typename T, Dim_t NbComponents>
size_t TypedFieldBase<FieldCollection, T, NbComponents>::
size() const {
return this->array.size();
}
/* ---------------------------------------------------------------------- */
template <class FieldCollection, typename T, Dim_t NbComponents>
T* TypedFieldBase<FieldCollection, T, NbComponents>::
get_ptr_to_entry(const size_t&& index) {
return &this->array[std::move(index)](0, 0);
}
/* ---------------------------------------------------------------------- */
template <class FieldCollection, typename T, Dim_t NbComponents>
T& TypedFieldBase<FieldCollection, T, NbComponents>::
get_ref_to_entry(const size_t && index) {
return this->array[std::move(index)](0, 0);
}
/* ---------------------------------------------------------------------- */
template <class FieldCollection, typename T, Dim_t NbComponents>
void TypedFieldBase<FieldCollection, T, NbComponents>::
resize(size_t size) {
this->array.resize(size);
}
/* ---------------------------------------------------------------------- */
template <class FieldCollection, typename T, Dim_t NbComponents>
void TypedFieldBase<FieldCollection, T, NbComponents>::
push_back(const StoredType & value) {
this->array.push_back(value);
}
/* ---------------------------------------------------------------------- */
template <class FieldCollection, typename T, Dim_t NbComponents>
template <class... Args>
void TypedFieldBase<FieldCollection, T, NbComponents>::
emplace_back(Args&&... args) {
this->array.emplace_back(std::move(args...));
}
} // internal
/* ---------------------------------------------------------------------- */
//! Factory function, guarantees that only fields get created that are
//! properly registered and linked to a collection.
template<class FieldType, class FieldCollection, typename... Args>
typename FieldType::Base &
make_field(std::string unique_name,
FieldCollection & collection,
Args&&... args) {
auto && ptr = std::unique_ptr<FieldType>{
new FieldType(unique_name, collection, args...)};
auto& retref = *ptr;
collection.register_field(std::move(ptr));
return retref;
}
/* ---------------------------------------------------------------------- */
template <class FieldCollection, typename T, Dim_t order, Dim_t dim>
TensorField<FieldCollection, T, order, dim>::
TensorField(std::string unique_name, FieldCollection & collection)
:Parent(unique_name, collection) {}
/* ---------------------------------------------------------------------- */
template <class FieldCollection, typename T, Dim_t order, Dim_t dim>
Dim_t TensorField<FieldCollection, T, order, dim>::
get_order() const {
return order;
}
/* ---------------------------------------------------------------------- */
template <class FieldCollection, typename T, Dim_t order, Dim_t dim>
Dim_t TensorField<FieldCollection, T, order, dim>::
get_dim() const {
return dim;
}
/* ---------------------------------------------------------------------- */
template <class FieldCollection, typename T, Dim_t NbRow, Dim_t NbCol>
MatrixField<FieldCollection, T, NbRow, NbCol>::
MatrixField(std::string unique_name, FieldCollection & collection)
:Parent(unique_name, collection) {}
/* ---------------------------------------------------------------------- */
template <class FieldCollection, typename T, Dim_t NbRow, Dim_t NbCol>
Dim_t MatrixField<FieldCollection, T, NbRow, NbCol>::
get_nb_col() const {
return NbCol;
}
/* ---------------------------------------------------------------------- */
template <class FieldCollection, typename T, Dim_t NbRow, Dim_t NbCol>
Dim_t MatrixField<FieldCollection, T, NbRow, NbCol>::
get_nb_row() const {
return NbRow;
}
} // muSpectre
#endif /* FIELD_H */
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