BLPoints.cpp

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///////////////////////////////////////////////////////////////////////////////
//
// File: BLPoints.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 boundary layer points
//
///////////////////////////////////////////////////////////////////////////////
 
#include <boost/core/ignore_unused.hpp>
 
#include <LibUtilities/BasicUtils/ErrorUtil.hpp>
#include <LibUtilities/Foundations/BLPoints.h>
#include <LibUtilities/Foundations/ManagerAccess.h>
#include <LibUtilities/Foundations/Points.h>
 
namespace Nektar
{
namespace LibUtilities
{
bool BLPoints::initPointsManager[] = {
    PointsManager().RegisterCreator(PointsKey(0, eBoundaryLayerPoints),
                                    BLPoints::Create),
    PointsManager().RegisterCreator(PointsKey(0, eBoundaryLayerPointsRev),
                                    BLPoints::Create)};
 
void BLPoints::v_CalculatePoints()
{
    // Allocate the storage for points.
    PointsBaseType::v_CalculatePoints();
    unsigned int npts = m_pointsKey.GetNumPoints();
 
    // Derived power coefficient.
    NekDouble r = m_pointsKey.GetFactor();
    ASSERTL0(r != NekConstants::kNekUnsetDouble,
             "Must set factor in BLPoints key");
 
    if (fabs(r - 1.0) < 1e-6)
    {
        NekDouble tmp = 2.0 / (npts - 1.0);
        for (unsigned int i = 0; i < npts; ++i)
        {
            m_points[0][i] = -1.0 + i * tmp;
        }
    }
    else
    {
        NekDouble a    = 2.0 * (1.0 - r) / (1.0 - pow(r, (double)(npts - 1)));
        m_points[0][0] = -1.0;
 
        for (unsigned int i = 1; i < npts; ++i)
        {
            m_points[0][i] = m_points[0][i - 1] + a * pow(r, (double)(i - 1));
        }
 
        m_points[0][npts - 1] = 1.0;
    }
 
    if (m_pointsKey.GetPointsType() == eBoundaryLayerPointsRev)
    {
        std::vector<NekDouble> tmp(npts);
        for (unsigned int i = 0; i < npts; ++i)
        {
            tmp[i] = -m_points[0][npts - 1 - i];
        }
 
        for (unsigned int i = 0; i < npts; ++i)
        {
            m_points[0][i] = tmp[i];
        }
    }
}
 
void BLPoints::v_CalculateWeights()
{
}
 
void BLPoints::v_CalculateDerivMatrix()
{
    //// Allocate the derivative matrix.
    Points<NekDouble>::v_CalculateDerivMatrix();
}
 
std::shared_ptr<Points<NekDouble>> BLPoints::Create(const PointsKey &key)
{
    std::shared_ptr<Points<NekDouble>> returnval(
        MemoryManager<BLPoints>::AllocateSharedPtr(key));
 
    returnval->Initialize();
 
    return returnval;
}
 
std::shared_ptr<NekMatrix<NekDouble>> BLPoints::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>> BLPoints::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>> BLPoints::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>> BLPoints::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 BLPoints::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