ptems::FixedFractionMarking Struct Reference

Functor object that can be passed to FEMesh::Adapt(Func, bool) to perform Fixed Fraction marking for refinement of elements based on refining/coarsening a set fraction of the largest/smallest error indicators. More...

#include <ptems/refinements.hpp>

Public Member Functions
template<typename Estimators >
	FixedFractionMarking (const Estimators &estimators, double refinePercent, double coarsenPercent=0)
	Create a functor for performing Fixed Fraction marking. More...
AdaptationType	operator() (std::size_t element) const
	Functor operator to compute the adaptation type for the specifeid element. More...

Detailed Description

Functor object that can be passed to FEMesh::Adapt(Func, bool) to perform Fixed Fraction marking for refinement of elements based on refining/coarsening a set fraction of the largest/smallest error indicators.

Given a mesh \(\mathcal{T}_h\) and per-element error indicators \(\eta_K\), \(K\in\mathcal{T}_h\), this marking strategy marks \(\theta_R #\mathcal{T}_h\) elements for refinement with the largest values of \(\eta_K\) and marks \(\theta_C #\mathcal{T}_h\) elements for coarsening with the smallest values of \(\eta_K\), where \(\theta_R\in(0,1)\) and \(\theta_C\in[0,1)\) are percentages.

Constructor & Destructor Documentation

FixedFractionMarking()

template<typename Estimators >

ptems::FixedFractionMarking::FixedFractionMarking ( const Estimators &  estimators, double  refinePercent, double  coarsenPercent = 0  )

inline

Create a functor for performing Fixed Fraction marking.

Exceptions

std::invalid_argument	If estimators.empty() is true
std::invalid_argument	If refinePercent is not in \([0,1]\)
std::invalid_argument	If coarsenPercent is not in \((0,1)\)
std::invalid_argument	If refinePercent+coarsenPercent is greater than 1.

Template Parameters

Estimators

Type of the list of estimators. Must by an STL-like container supporting empty(), size(), begin(), end(), and operator[](std::size_t)

Parameters

estimators	List of error indicators \(\eta_K\) (one per element) to use for Dörfler marking.
refinePercent	The constant \(\theta_R\) denoting the percentage of the elements with the largest error indicators to mark for refinement. Must be in range \((0,1)\).
coarsenPercent	The constant \(\theta_C\) denoting the percentage of the elements with the smallest error indicators to mark for refinement. Must be in range \([0,1)\) and refinePercent+coarsenPercent must be less than 1.

Member Function Documentation

operator()()

AdaptationType ptems::FixedFractionMarking::operator() ( std::size_t  element ) const

inline

Functor operator to compute the adaptation type for the specifeid element.

Parameters

element

Index of the element to get the adaptation type for

Returns

Adaptation type (Refine, coarsen, or none)

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The documentation for this struct was generated from the following file:

• ptems/refinements.hpp