5#ifndef DUNE_LOCALFUNCTIONS_RAVIARTTHOMAS1_CUBE2D_LOCALINTERPOLATION_HH
6#define DUNE_LOCALFUNCTIONS_RAVIARTTHOMAS1_CUBE2D_LOCALINTERPOLATION_HH
11#include <dune/localfunctions/common/localinterpolation.hh>
37 for (
size_t i=0; i<4; i++)
38 sign_[i] = (s[i]) ? -1.0 : 1.0;
54 template<
class F,
class C>
58 typedef typename LB::Traits::RangeFieldType
Scalar;
59 typedef typename LB::Traits::DomainFieldType Vector;
61 auto&& f = Impl::makeFunctionWithCallOperator<typename LB::Traits::DomainType>(ff);
64 fill(out.begin(), out.end(), 0.0);
69 for (
auto&& qp : rule1)
71 Scalar qPos = qp.position();
72 typename LB::Traits::DomainType localPos = {0.0, qPos};
75 out[0] += (y[0]*n_[0][0] + y[1]*n_[0][1])*qp.weight()*sign_[0];
76 out[1] += (y[0]*n_[0][0] + y[1]*n_[0][1])*(2.0*qPos - 1.0)*qp.weight();
78 localPos = {1.0, qPos};
80 out[2] += (y[0]*n_[1][0] + y[1]*n_[1][1])*qp.weight()*sign_[1];
81 out[3] += (y[0]*n_[1][0] + y[1]*n_[1][1])*(1.0 - 2.0*qPos)*qp.weight();
83 localPos = {qPos, 0.0};
85 out[4] += (y[0]*n_[2][0] + y[1]*n_[2][1])*qp.weight()*sign_[2];
86 out[5] += (y[0]*n_[2][0] + y[1]*n_[2][1])*(1.0 - 2.0*qPos)*qp.weight();
88 localPos = {qPos, 1.0};
90 out[6] += (y[0]*n_[3][0] + y[1]*n_[3][1])*qp.weight()*sign_[3];
91 out[7] += (y[0]*n_[3][0] + y[1]*n_[3][1])*(2.0*qPos - 1.0)*qp.weight();
96 for (
auto&& qp : rule2)
98 auto qPos = qp.position();
101 out[8] += y[0]*qp.weight();
102 out[9] += y[1]*qp.weight();
103 out[10] += y[0]*qPos[1]*qp.weight();
104 out[11] += y[1]*qPos[0]*qp.weight();
110 std::array<typename LB::Traits::RangeFieldType, 4> sign_;
113 std::array<typename LB::Traits::DomainType, 4> n_;
static const QuadratureRule & rule(const GeometryType &t, int p, QuadratureType::Enum qt=QuadratureType::GaussLegendre)
select the appropriate QuadratureRule for GeometryType t and order p
Definition: quadraturerules.hh:266
First order Raviart-Thomas shape functions on the reference quadrilateral.
Definition: raviartthomas1cube2dlocalinterpolation.hh:27
RT1Cube2DLocalInterpolation(std::bitset< 4 > s=0)
Make set number s, where 0 <= s < 16.
Definition: raviartthomas1cube2dlocalinterpolation.hh:35
void interpolate(const F &ff, std::vector< C > &out) const
Interpolate a given function with shape functions.
Definition: raviartthomas1cube2dlocalinterpolation.hh:55
constexpr GeometryType cube(unsigned int dim)
Returns a GeometryType representing a hypercube of dimension dim.
Definition: type.hh:472
typename Overloads::ScalarType< std::decay_t< V > >::type Scalar
Element type of some SIMD type.
Definition: interface.hh:235
Dune namespace.
Definition: alignedallocator.hh:13