Stokhos_SparseGridQuadrature.hpp

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// @HEADER
// *****************************************************************************
//                           Stokhos Package
//
// Copyright 2009 NTESS and the Stokhos contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef STOKHOS_SPARSEGRIDQUADRATURE
#define STOKHOS_SPARSEGRIDQUADRATURE

#include "Stokhos_ConfigDefs.h"
#ifdef HAVE_STOKHOS_DAKOTA

#include "Stokhos_Quadrature.hpp"
#include "Stokhos_ProductBasis.hpp"
#include "Teuchos_RCP.hpp"
#include "pecos_global_defs.hpp"

namespace Stokhos {

  template <typename ordinal_type, typename value_type>
  class SparseGridQuadrature : public Quadrature<ordinal_type,value_type> {
  public:


    SparseGridQuadrature(
      const Teuchos::RCP<const ProductBasis<ordinal_type,value_type> >& product_basis, 
      ordinal_type sparse_grid_level = 0,
      value_type duplicate_tol = 1.0e-12,
      ordinal_type growth_rate = Pecos::SLOW_RESTRICTED_GROWTH);

    virtual ~SparseGridQuadrature() {}

    virtual ordinal_type size() const { return quad_weights.size(); }


    virtual const Teuchos::Array< Teuchos::Array<value_type> >& 
    getQuadPoints() const;


    virtual const Teuchos::Array<value_type>& 
    getQuadWeights() const;


    virtual const Teuchos::Array< Teuchos::Array<value_type> > & 
    getBasisAtQuadPoints() const;

    virtual std::ostream& print(std::ostream& os) const;

  private:

    // Prohibit copying
    SparseGridQuadrature(const SparseGridQuadrature&);

    // Prohibit Assignment
    SparseGridQuadrature& operator=(const SparseGridQuadrature& b);

    static void getMyPoints( int order, int dim, double x[] );
  
    static void getMyWeights( int order, int dim, double w[] );

  protected:

    Teuchos::Array< Teuchos::RCP<const OneDOrthogPolyBasis<ordinal_type,value_type> > > coordinate_bases;

    Teuchos::Array< Teuchos::Array<value_type> > quad_points;

    Teuchos::Array<value_type> quad_weights;

    Teuchos::Array< Teuchos::Array<value_type> >  quad_values;

    static SparseGridQuadrature *sgq;

  }; // class SparseGridQuadrature

} // namespace Stokhos

// Include template definitions
#include "Stokhos_SparseGridQuadratureImp.hpp"

#endif // HAVE_STOKHOS_DAKOTA

#endif // STOKHOS_SPARSEGRIDQUADRATURE