FourierSingleModePoints.cpp

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///////////////////////////////////////////////////////////////////////////////
//
// File: FourierSingleModePoints.cpp
//
// For more information, please see: http://www.nektar.info
//
// The MIT License
//
// Copyright (c) 2006 Division of Applied Mathematics, Brown University (USA),
// Department of Aeronautics, Imperial College London (UK), and Scientific
// Computing and Imaging Institute, University of Utah (USA).
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
// Description: 1D Non Evenly-Spaced Fourier Points for stability analysis
//
///////////////////////////////////////////////////////////////////////////////
 
#include <boost/core/ignore_unused.hpp>
 
#include <LibUtilities/BasicUtils/ErrorUtil.hpp>
#include <LibUtilities/Foundations/FourierSingleModePoints.h>
#include <LibUtilities/Foundations/ManagerAccess.h> // for PointsManager, etc
#include <LibUtilities/LinearAlgebra/NekMatrix.hpp>
 
namespace Nektar
{
namespace LibUtilities
{
bool FourierSingleModePoints::initPointsManager[] = {
    PointsManager().RegisterCreator(PointsKey(0, eFourierSingleModeSpaced),
                                    FourierSingleModePoints::Create)};
 
void FourierSingleModePoints::v_CalculatePoints()
{
    // Allocate the storage for points
    PointsBaseType::v_CalculatePoints();
    unsigned int npts = m_pointsKey.GetNumPoints();
 
    if (npts == 1)
    {
        m_points[0][0] = 0.25;
    }
    else
 
    {
        ASSERTL0(npts == 2,
                 "Fourier points for single mode analysis should be 2");
 
        m_points[0][0] = 0.0;
        m_points[0][1] = 0.5;
    }
}
 
void FourierSingleModePoints::v_CalculateWeights()
{
    // Allocate the storage for points
    PointsBaseType::v_CalculateWeights();
 
    unsigned int npts = m_pointsKey.GetNumPoints();
    // Here I need to insert the weight for the new point distribution
    for (unsigned int i = 0; i < npts; ++i)
    {
        m_weights[i] = 1.0;
    }
}
 
void FourierSingleModePoints::v_CalculateDerivMatrix()
{
 
    Points<NekDouble>::v_CalculateDerivMatrix();
}
 
std::shared_ptr<Points<NekDouble>> FourierSingleModePoints::Create(
    const PointsKey &key)
{
    std::shared_ptr<Points<NekDouble>> returnval(
        MemoryManager<FourierSingleModePoints>::AllocateSharedPtr(key));
 
    returnval->Initialize();
 
    return returnval;
}
 
std::shared_ptr<NekMatrix<NekDouble>> FourierSingleModePoints::CreateMatrix(
    const PointsKey &pkey)
{
    int numpoints = pkey.GetNumPoints();
    Array<OneD, const NekDouble> xpoints;
 
    PointsManager()[pkey]->GetPoints(xpoints);
 
    /// Delegate to function below.
    return GetI(numpoints, xpoints);
}
 
const std::shared_ptr<NekMatrix<NekDouble>> FourierSingleModePoints::v_GetI(
    const PointsKey &pkey)
{
    ASSERTL0(pkey.GetPointsDim() == 1,
             "Fourier Points can only interp to other 1d point distributions");
 
    return m_InterpManager[pkey];
}
 
const std::shared_ptr<NekMatrix<NekDouble>> FourierSingleModePoints::v_GetI(
    const Array<OneD, const NekDouble> &x)
{
    int numpoints = 1;
 
    /// Delegate to function below.
    return GetI(numpoints, x);
}
 
const std::shared_ptr<NekMatrix<NekDouble>> FourierSingleModePoints::v_GetI(
    unsigned int numpoints, const Array<OneD, const NekDouble> &x)
{
    Array<OneD, NekDouble> interp(GetNumPoints() * numpoints);
 
    CalculateInterpMatrix(numpoints, x, interp);
 
    NekDouble *t    = interp.data();
    unsigned int np = GetNumPoints();
    std::shared_ptr<NekMatrix<NekDouble>> returnval(
        MemoryManager<NekMatrix<NekDouble>>::AllocateSharedPtr(numpoints, np,
                                                               t));
 
    return returnval;
}
 
void FourierSingleModePoints::CalculateInterpMatrix(
    unsigned int npts, const Array<OneD, const NekDouble> &xpoints,
    Array<OneD, NekDouble> &interp)
{
    boost::ignore_unused(npts, xpoints, interp);
}
 
} // end of namespace LibUtilities
} // end of namespace Nektar