/usr/include/dune/localfunctions/lagrange/interpolation.hh is in libdune-localfunctions-dev 2.2.1-2.
This file is owned by root:root, with mode 0o644.
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 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | #ifndef DUNE_LAGRANGEBASIS_INTERPOLATION_HH
#define DUNE_LAGRANGEBASIS_INTERPOLATION_HH
#include <vector>
#include <dune/geometry/topologyfactory.hh>
#include <dune/localfunctions/lagrange/lagrangecoefficients.hh>
namespace Dune
{
template< template <class,unsigned int> class LP,
unsigned int dim, class F >
struct LagrangeInterpolationFactory;
// LocalLagrangeInterpolation
// --------------------------
template< template <class,unsigned int> class LP,
unsigned int dim, class F >
class LocalLagrangeInterpolation
{
typedef LocalLagrangeInterpolation< LP,dim,F > This;
public:
typedef LP<F,dim> LagrangePointSet;
typedef typename LagrangePointSet::Field Field;
static const unsigned int dimension = LagrangePointSet::dimension;
private:
friend class LagrangeInterpolationFactory<LP,dim,F>;
const LagrangePointSet &lagrangePoints_;
explicit LocalLagrangeInterpolation ( const LagrangePointSet &lagrangePoints )
: lagrangePoints_( lagrangePoints )
{}
const LagrangePointSet *points () const
{
return &lagrangePoints_;
}
public:
template< class Function, class Fy >
void interpolate ( const Function &function, std::vector< Fy > &coefficients ) const
{
typedef typename LagrangePointSet::iterator Iterator;
coefficients.resize( lagrangePoints_.size() );
unsigned int index = 0;
const Iterator end = lagrangePoints_.end();
for( Iterator it = lagrangePoints_.begin(); it != end; ++it )
{
typename Function::RangeType val;
function.evaluate( field_cast<typename Function::DomainType::field_type>(it->point()), val );
field_cast( val, coefficients[ index++ ] );
}
}
template< class Matrix, class Basis >
void interpolate ( const Basis &basis, Matrix &coefficients ) const
{
typedef typename LagrangePointSet::iterator Iterator;
coefficients.resize( lagrangePoints_.size(), basis.size( ) );
unsigned int index = 0;
const Iterator end = lagrangePoints_.end();
for( Iterator it = lagrangePoints_.begin(); it != end; ++it )
basis.template evaluate<0>( it->point(), coefficients.rowPtr( index++ ) );
}
const LagrangePointSet &lagrangePoints () const
{
return lagrangePoints_;
}
};
// LocalLagrangeInterpolationFactory
// ---------------------------------
template< template <class,unsigned int> class LP,
unsigned int dim, class F >
struct LagrangeInterpolationFactoryTraits
{
typedef LagrangeCoefficientsFactory<LP,dim,F> LagrangePointSetFactory;
typedef typename LagrangePointSetFactory::Object LagrangePointSet;
typedef typename LagrangePointSetFactory::Key Key;
typedef const LocalLagrangeInterpolation< LP,dim,F > Object;
typedef LagrangeInterpolationFactory<LP,dim,F> Factory;
static const unsigned int dimension = dim;
};
template< template <class,unsigned int> class LP,
unsigned int dim, class F >
struct LagrangeInterpolationFactory :
public TopologyFactory< LagrangeInterpolationFactoryTraits< LP,dim,F > >
{
typedef LagrangeInterpolationFactoryTraits< LP,dim,F > Traits;
typedef typename Traits::Key Key;
typedef typename Traits::Object Object;
template< class Topology >
static Object *createObject ( const Key &key )
{
const typename Traits::LagrangePointSet *lagrangeCoeff
= Traits::LagrangePointSetFactory::template create< Topology >( key );
if ( lagrangeCoeff == 0 )
return 0;
else
return new Object( *lagrangeCoeff );
}
template< class Topology >
static bool supports ( const typename Traits::Key &key )
{
return true;
}
static void release( Object *object)
{
Traits::LagrangePointSetFactory::release( object->points() );
delete object;
}
};
}
#endif // #ifndef DUNE_LAGRANGEBASIS_INTERPOLATION_HH
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