dune-pdelab  2.7-git
l2volumefunctional.hh
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1 // -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 // vi: set et ts=4 sw=2 sts=2:
3 #ifndef DUNE_PDELAB_LOCALOPERATOR_L2VOLUMEFUNCTIONAL_HH
4 #define DUNE_PDELAB_LOCALOPERATOR_L2VOLUMEFUNCTIONAL_HH
5 
6 #include <vector>
7 
8 #include <dune/common/exceptions.hh>
9 #include <dune/common/fvector.hh>
10 
11 #include <dune/geometry/type.hh>
12 
13 #include <dune/localfunctions/common/interfaceswitch.hh>
14 
19 
20 namespace Dune {
21  namespace PDELab {
25 
35  template<typename F>
38  {
39  public:
40  // residual assembly flags
41  enum { doLambdaVolume = true };
42 
48  L2VolumeFunctional (const F& f, unsigned int quadOrder)
49  : f_(f), quadOrder_(quadOrder)
50  {}
51 
52  // volume integral depending only on test functions
53  template<typename EG, typename LFSV, typename R>
54  void lambda_volume (const EG& eg, const LFSV& lfsv, R& r) const
55  {
56  // Define types
57  using FESwitch = FiniteElementInterfaceSwitch<typename LFSV::Traits::FiniteElementType>;
58  using BasisSwitch = BasisInterfaceSwitch<typename FESwitch::Basis>;
59  using Range = typename BasisSwitch::Range;
60 
61  // Reference to cell
62  const auto& cell = eg.entity();
63 
64  // get geometry
65  auto geo = eg.geometry();
66 
67  // Initialize vectors outside for loop
68  std::vector<Range> phi(lfsv.size());
69  typename F::Traits::RangeType y(0.0);
70 
71  // loop over quadrature points
72  for (const auto& ip : quadratureRule(geo,quadOrder_))
73  {
74  // evaluate shape functions
75  FESwitch::basis(lfsv.finiteElement()).
76  evaluateFunction(ip.position(),phi);
77 
78  // evaluate right hand side parameter function
79  f_.evaluate(cell,ip.position(),y);
80 
81  // integrate f
82  auto factor = r.weight() * ip.weight() * geo.integrationElement(ip.position());
83  for (size_t i=0; i<lfsv.size(); i++)
84  r.rawAccumulate(lfsv,i,y*phi[i]*factor);
85  }
86  }
87 
88  protected:
89  const F& f_;
90 
91  // Quadrature rule order
92  unsigned int quadOrder_;
93  };
94 
96  } // namespace PDELab
97 } // namespace Dune
98 
99 #endif // DUNE_PDELAB_LOCALOPERATOR_L2VOLUMEFUNCTIONAL_HH
For backward compatibility – Do not use this!
Definition: adaptivity.hh:28
QuadratureRuleWrapper< QuadratureRule< typename Geometry::ctype, Geometry::mydimension > > quadratureRule(const Geometry &geo, std::size_t order, QuadratureType::Enum quadrature_type=QuadratureType::GaussLegendre)
Returns a quadrature rule for the given geometry.
Definition: quadraturerules.hh:117
Default flags for all local operators.
Definition: flags.hh:19
A local operator that tests a function against a test function space defined on the entire grid.
Definition: l2volumefunctional.hh:38
L2VolumeFunctional(const F &f, unsigned int quadOrder)
Constructor.
Definition: l2volumefunctional.hh:48
@ doLambdaVolume
Definition: l2volumefunctional.hh:41
unsigned int quadOrder_
Definition: l2volumefunctional.hh:92
void lambda_volume(const EG &eg, const LFSV &lfsv, R &r) const
Definition: l2volumefunctional.hh:54
const F & f_
Definition: l2volumefunctional.hh:89