volumetricPenaltyFunctions.hh

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/*   This file is part of the C++-library RFFGen.                              */
/*   Copyright 2015 Lars Lubkoll                                               */
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/*   RFFGen is free software: you can redistribute it and/or modify            */
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#ifndef RFFGEN_EXAMPLES_VOLUMETRIC_PENALTY_FUNCTIONS_HH
#define RFFGEN_EXAMPLES_VOLUMETRIC_PENALTY_FUNCTIONS_HH

#include "../LinearAlgebra/determinant.hh"
#include "../CMath/log.hh"
#include "../CMath/pow.hh"
#include "../generate.hh"

namespace RFFGen
{
  template <class Inflation, class Compression, class Matrix>
  auto volumetricPenalty(double d0, double d1, const Matrix& A)
  {
    auto det = LinearAlgebra::Determinant<Matrix>(A);
    auto f = ( d0*Inflation(det()) + d1*Compression(det()) ) << det;
    auto g = f - f.d0();
    return g;
  }

  template <class Matrix>
  auto volumetricQuadAndLog(double d0, double d1, const Matrix& A)
  {
    return volumetricPenalty< CMath::Pow<2> , CMath::LN >(d0,d1,A);
  }

  template <class Matrix>
  auto volumetricHartmannNeff(double d0, double d1, const Matrix& A)
  {
    return volumetricPenalty< CMath::Pow<5> , CMath::Pow<-5> >(d0,d1,A);
  }
}

#endif // RFFGEN_EXAMPLES_VOLUMETRIC_PENALTY_FUNCTIONS_HH