/usr/include/dune/localfunctions/lagrange/pk2d/pk2dlocalinterpolation.hh is in libdune-localfunctions-dev 2.5.0-2.
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The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | // -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_Pk2DLOCALINTERPOLATION_HH
#define DUNE_Pk2DLOCALINTERPOLATION_HH
#include <vector>
namespace Dune
{
template<class LB>
class Pk2DLocalInterpolation
{
/** \brief The number of degrees of freedom */
enum {N = LB::N};
/** \brief Export the element order */
enum {k = LB::O};
private:
static const int kdiv = (k == 0 ? 1 : k);
public:
template<typename F, typename C>
void interpolate (const F& f, std::vector<C>& out) const
{
typename LB::Traits::DomainType x;
typename LB::Traits::RangeType y;
typedef typename LB::Traits::DomainFieldType D;
out.resize(N);
int n=0;
for (int j=0; j<=k; j++)
for (int i=0; i<=k-j; i++)
{
x[0] = ((D)i)/((D)kdiv); x[1] = ((D)j)/((D)kdiv);
f.evaluate(x,y);
out[n] = y;
n++;
}
}
};
}
#endif
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