hp3D::RefineOrRaise< F, G > Class Template Reference
Refines element or raises its polynomial degree. More...
#include <hpExtension.hh>
Public Member Functions | |
| virtual void | operator() (const concepts::Cell &cell) throw (concepts::MissingFeature) |
| Application operator. More... | |
| virtual void | operator() (const concepts::Element< F > &elm) throw (concepts::MissingFeature) |
| Application operator. More... | |
| RefineOrRaise (const concepts::Vector< F > &solution, const Real theta, concepts::AdaptiveSpace< G, concepts::AdaptiveAdjustP< 3 > > &spc) | |
| Constructor. More... | |
Protected Member Functions | |
| virtual std::ostream & | info (std::ostream &os) const |
| Returns information in an output stream. More... | |
Private Member Functions | |
| bool | regression_ (concepts::Array< F > &coeff, const uint p) const |
| Makes the regression test. More... | |
| Real | transCoeff_ (const uint i, const uint j) const |
| Returns the ith coefficient of the jth shape function in a Legendre expansion. More... | |
Private Attributes | |
| concepts::Array< F > | coeff_ |
| Elementwise coefficients of the shape functions. More... | |
| concepts::Array< F > | legendre_ |
| Legendre coefficients. More... | |
| concepts::Array< F > | regr_ |
| Temporary space for the log linear regression. More... | |
| const concepts::Vector< F > & | solution_ |
| Vector of the variable to plot. More... | |
| concepts::AdaptiveSpace< G, concepts::AdaptiveAdjustP< 3 > > & | spc_ |
| Space. More... | |
| const Real | theta_ |
| Decision parameter. More... | |
Detailed Description
template<typename F, typename G = typename concepts::Realtype<F>::type>
class hp3D::RefineOrRaise< F, G >
Refines element or raises its polynomial degree.
The decision is based on a log linear regression to find out if the Legendre coefficients of the solution decrease exponentially.
The parameter theta is used to control this decision. If 
is less than theta, the element's polynomial degree is raised, otherwise it is refined. m is the slope of the fitted line in the regression. This decision is taken anisotropic!
Definition at line 40 of file hpExtension.hh.
Constructor & Destructor Documentation
◆ RefineOrRaise()
| hp3D::RefineOrRaise< F, G >::RefineOrRaise | ( | const concepts::Vector< F > & | solution, |
| const Real | theta, | ||
| concepts::AdaptiveSpace< G, concepts::AdaptiveAdjustP< 3 > > & | spc | ||
| ) |
Constructor.
- Parameters
-
solution Solution vector theta Decision parameter spc Space (is used for the refinements)
Member Function Documentation
◆ info()
|
protectedvirtualinherited |
Returns information in an output stream.
Reimplemented from concepts::OutputOperator.
Reimplemented in concepts::CellEdgeIntegral< F >, concepts::CellFaceIntegral< F >, concepts::CellIntegral< F >, concepts::PRefinement< F, dim >, concepts::HRefinement< F, dim >, hp3D::APrioriRefinement, hp2D::APrioriRefinement, graphics::VertexList, graphics::MatrixBaseElementFormulaCell< F, G >, graphics::MatrixCounterCell, graphics::BaseMeshCell, graphics::BaseFormulaCell< F, G >, graphics::BaseElementFormulaCell< F, G >, graphics::BaseDataCell< F, G >, graphics::BaseOutputCell< F >, graphics::BaseOutputCell< typename concepts::Realtype< F >::type >, and graphics::BaseOutputCell< Real >.
◆ operator()() [1/2]
|
inlinevirtual | ||||||||||||||
Application operator.
This application operator has to be overloaded to post process a mesh.
- Parameters
-
cell Current cell
Implements concepts::CellPostprocess< F >.
Definition at line 52 of file hpExtension.hh.
◆ operator()() [2/2]
|
virtual | ||||||||||||||
Application operator.
This application operator has to be overloaded to post process a space.
- Parameters
-
elm Current element
Implements concepts::CellPostprocess< F >.
◆ regression_()
|
private |
Makes the regression test.
The coefficients in coeff are one dimensional, ie. 3D coefficients are collapsed to 1D using
![\[ |\hat a_i| = \left( \sum_{j=0}^{n_y} \sum_{k=0}^{n_z} |a_{ijk}|^2 \frac{2}{2j+1} \frac{2}{2k+1} \right)^{1/2} \]](form_577.png)
before calling this function.
- Parameters
-
coeff 1D coefficients, will be overwritten p Polynomial degree
- Returns
- true if the coefficients seem to decrease exponentially, ie. increasing p is recommended
◆ transCoeff_()
|
private |
Returns the ith coefficient of the jth shape function in a Legendre expansion.
![\[ a_{ij} = \frac{2i+1}{2} \int_{-1}^1 \psi_j(x) L_i(x) \, dx \]](form_576.png)
Member Data Documentation
◆ coeff_
|
private |
Elementwise coefficients of the shape functions.
Definition at line 56 of file hpExtension.hh.
◆ legendre_
|
private |
Legendre coefficients.
Definition at line 58 of file hpExtension.hh.
◆ regr_
|
private |
Temporary space for the log linear regression.
Definition at line 60 of file hpExtension.hh.
◆ solution_
|
private |
Vector of the variable to plot.
Definition at line 62 of file hpExtension.hh.
◆ spc_
|
private |
Definition at line 64 of file hpExtension.hh.
◆ theta_
|
private |
Decision parameter.
Definition at line 66 of file hpExtension.hh.
The documentation for this class was generated from the following file:
- hp3D/hpExtension.hh