Reference documentation for deal.II version Git 6177fad8a5 2019-03-23 23:27:20 +0100
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Public Types | Public Member Functions | Static Public Attributes | Private Attributes | List of all members
Functions::IncrementalFunction< dim, RangeNumberType > Class Template Reference

#include <deal.II/base/incremental_function.h>

Inheritance diagram for Functions::IncrementalFunction< dim, RangeNumberType >:
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Public Types

using time_type = typename Function< dim, RangeNumberType >::time_type
 
- Public Types inherited from Function< dim, RangeNumberType >
using time_type = typename FunctionTime< typename numbers::NumberTraits< RangeNumberType >::real_type >::time_type
 
- Public Types inherited from FunctionTime< numbers::NumberTraits< RangeNumberType >::real_type >
using time_type = numbers::NumberTraits< RangeNumberType >::real_type
 

Public Member Functions

 IncrementalFunction (Function< dim, RangeNumberType > &base)
 
virtual RangeNumberType value (const Point< dim > &p, const unsigned int component=0) const override
 
virtual void vector_value (const Point< dim > &p, Vector< RangeNumberType > &values) const override
 
void set_decrement (const time_type delta_t)
 
- Public Member Functions inherited from Function< dim, RangeNumberType >
 Function (const unsigned int n_components=1, const time_type initial_time=0.0)
 
virtual ~Function () override=0
 
Functionoperator= (const Function &f)
 
virtual void value_list (const std::vector< Point< dim >> &points, std::vector< RangeNumberType > &values, const unsigned int component=0) const
 
virtual void vector_value_list (const std::vector< Point< dim >> &points, std::vector< Vector< RangeNumberType >> &values) const
 
virtual void vector_values (const std::vector< Point< dim >> &points, std::vector< std::vector< RangeNumberType >> &values) const
 
virtual Tensor< 1, dim, RangeNumberType > gradient (const Point< dim > &p, const unsigned int component=0) const
 
virtual void vector_gradient (const Point< dim > &p, std::vector< Tensor< 1, dim, RangeNumberType >> &gradients) const
 
virtual void gradient_list (const std::vector< Point< dim >> &points, std::vector< Tensor< 1, dim, RangeNumberType >> &gradients, const unsigned int component=0) const
 
virtual void vector_gradients (const std::vector< Point< dim >> &points, std::vector< std::vector< Tensor< 1, dim, RangeNumberType >>> &gradients) const
 
virtual void vector_gradient_list (const std::vector< Point< dim >> &points, std::vector< std::vector< Tensor< 1, dim, RangeNumberType >>> &gradients) const
 
virtual RangeNumberType laplacian (const Point< dim > &p, const unsigned int component=0) const
 
virtual void vector_laplacian (const Point< dim > &p, Vector< RangeNumberType > &values) const
 
virtual void laplacian_list (const std::vector< Point< dim >> &points, std::vector< RangeNumberType > &values, const unsigned int component=0) const
 
virtual void vector_laplacian_list (const std::vector< Point< dim >> &points, std::vector< Vector< RangeNumberType >> &values) const
 
virtual SymmetricTensor< 2, dim, RangeNumberType > hessian (const Point< dim > &p, const unsigned int component=0) const
 
virtual void vector_hessian (const Point< dim > &p, std::vector< SymmetricTensor< 2, dim, RangeNumberType >> &values) const
 
virtual void hessian_list (const std::vector< Point< dim >> &points, std::vector< SymmetricTensor< 2, dim, RangeNumberType >> &values, const unsigned int component=0) const
 
virtual void vector_hessian_list (const std::vector< Point< dim >> &points, std::vector< std::vector< SymmetricTensor< 2, dim, RangeNumberType >>> &values) const
 
std::size_t memory_consumption () const
 
- Public Member Functions inherited from FunctionTime< numbers::NumberTraits< RangeNumberType >::real_type >
 FunctionTime (const numbers::NumberTraits< RangeNumberType >::real_type initial_time=numbers::NumberTraits< RangeNumberType >::real_type(0.0))
 
virtual ~FunctionTime ()=default
 
numbers::NumberTraits< RangeNumberType >::real_type get_time () const
 
virtual void set_time (const numbers::NumberTraits< RangeNumberType >::real_type new_time)
 
virtual void advance_time (const numbers::NumberTraits< RangeNumberType >::real_type delta_t)
 
- Public Member Functions inherited from Subscriptor
 Subscriptor ()
 
 Subscriptor (const Subscriptor &)
 
 Subscriptor (Subscriptor &&) noexcept
 
virtual ~Subscriptor ()
 
Subscriptoroperator= (const Subscriptor &)
 
Subscriptoroperator= (Subscriptor &&) noexcept
 
template<typename ConstCharStar = const char *>
std::enable_if< std::is_same< ConstCharStar, const char * >::value >::type subscribe (std::atomic< bool > *const validity, ConstCharStar identifier=nullptr) const
 
void subscribe (std::atomic< bool > *const validity, const char *&&identifier) const =delete
 
void unsubscribe (std::atomic< bool > *const validity, const char *identifier=nullptr) const
 
unsigned int n_subscriptions () const
 
template<typename StreamType >
void list_subscribers (StreamType &stream) const
 
void list_subscribers () const
 
template<class Archive >
void serialize (Archive &ar, const unsigned int version)
 

Static Public Attributes

static const unsigned int dimension = dim
 
- Static Public Attributes inherited from Function< dim, RangeNumberType >
static const unsigned int dimension = dim
 

Private Attributes

Function< dim, RangeNumberType > & base
 
time_type delta_t
 
Vector< RangeNumberType > values_old
 
Threads::Mutex mutex
 

Additional Inherited Members

- Static Public Member Functions inherited from Subscriptor
static ::ExceptionBaseExcInUse (int arg1, std::string arg2, std::string arg3)
 
static ::ExceptionBaseExcNoSubscriber (std::string arg1, std::string arg2)
 
- Public Attributes inherited from Function< dim, RangeNumberType >
const unsigned int n_components
 

Detailed Description

template<int dim, typename RangeNumberType = double>
class Functions::IncrementalFunction< dim, RangeNumberType >

This class represents an incremental function. That is, given an arbitrary function f, this class will return f(t) - f(t - delta_t), where f(t) denotes the function evaluated at time t and, likewise, f(t - delta_t) denotes the function evaluated at time t - delta_t. The decrement delta_t is set by the method set_decrement(). The main application of this class is to transform a given Dirichlet boundary condition function into incremental form, as is required by some implementations of non-linear solution schemes.

Author
Denis Davydov, Jean-Paul Pelteret, 2018

Definition at line 45 of file incremental_function.h.

Member Typedef Documentation

◆ time_type

template<int dim, typename RangeNumberType = double>
using Functions::IncrementalFunction< dim, RangeNumberType >::time_type = typename Function<dim, RangeNumberType>::time_type

The scalar-valued real type used for representing time.

Definition at line 57 of file incremental_function.h.

Constructor & Destructor Documentation

◆ IncrementalFunction()

template<int dim, typename RangeNumberType >
Functions::IncrementalFunction< dim, RangeNumberType >::IncrementalFunction ( Function< dim, RangeNumberType > &  base)

Constructor which wraps a given function base.

Note
This class stores a non-constant reference to base and will call base.set_time() during evaluation in order to evaluate the base class at any arbitrary time. It is guaranteed that the temporal state of base is returned to its original settings after each function evaluation in this class.

Definition at line 26 of file incremental_function.cc.

Member Function Documentation

◆ value()

template<int dim, typename RangeNumberType >
RangeNumberType Functions::IncrementalFunction< dim, RangeNumberType >::value ( const Point< dim > &  p,
const unsigned int  component = 0 
) const
overridevirtual

Return the value of the function at the given point.

Unless there is only one component (i.e. the function is scalar), you should state the component you want to have evaluated. By default, the value of the first component is computed.

Reimplemented from Function< dim, RangeNumberType >.

Definition at line 50 of file incremental_function.cc.

◆ vector_value()

template<int dim, typename RangeNumberType >
void Functions::IncrementalFunction< dim, RangeNumberType >::vector_value ( const Point< dim > &  p,
Vector< RangeNumberType > &  values 
) const
overridevirtual

Return all components of a vector-valued function at a given point.

It is required that the values vector have the correct size before this function is called.

Reimplemented from Function< dim, RangeNumberType >.

Definition at line 79 of file incremental_function.cc.

◆ set_decrement()

template<int dim, typename RangeNumberType = double>
void Functions::IncrementalFunction< dim, RangeNumberType >::set_decrement ( const time_type  delta_t)

Set the time decrement.

It is expected that this value be positive.

Definition at line 38 of file incremental_function.cc.

Member Data Documentation

◆ dimension

template<int dim, typename RangeNumberType = double>
const unsigned int Functions::IncrementalFunction< dim, RangeNumberType >::dimension = dim
static

Export the value of the template parameter as a static member constant. This is sometimes useful in the context of template programming.

Definition at line 52 of file incremental_function.h.

◆ base

template<int dim, typename RangeNumberType = double>
Function<dim, RangeNumberType>& Functions::IncrementalFunction< dim, RangeNumberType >::base
private

A reference to the function being wrapped.

Definition at line 103 of file incremental_function.h.

◆ delta_t

template<int dim, typename RangeNumberType = double>
time_type Functions::IncrementalFunction< dim, RangeNumberType >::delta_t
private

The time decrement.

Definition at line 108 of file incremental_function.h.

◆ values_old

template<int dim, typename RangeNumberType = double>
Vector<RangeNumberType> Functions::IncrementalFunction< dim, RangeNumberType >::values_old
mutableprivate

An auxiliary vector to store values.

Definition at line 113 of file incremental_function.h.

◆ mutex

template<int dim, typename RangeNumberType = double>
Threads::Mutex Functions::IncrementalFunction< dim, RangeNumberType >::mutex
mutableprivate

Thread mutex for supporting evaluation in multi-threaded contexts.

Definition at line 118 of file incremental_function.h.


The documentation for this class was generated from the following files: